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WO1993001978A1 - Procede et dispositif de conditionnement et de scellement au moyen d'un film extensible et avec scellement transversal - Google Patents

Procede et dispositif de conditionnement et de scellement au moyen d'un film extensible et avec scellement transversal Download PDF

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Publication number
WO1993001978A1
WO1993001978A1 PCT/US1992/005544 US9205544W WO9301978A1 WO 1993001978 A1 WO1993001978 A1 WO 1993001978A1 US 9205544 W US9205544 W US 9205544W WO 9301978 A1 WO9301978 A1 WO 9301978A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
sealing
product
side edges
packaging
Prior art date
Application number
PCT/US1992/005544
Other languages
English (en)
Inventor
Martin Siegel
Original Assignee
Weldotron Of Delaware, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weldotron Of Delaware, Inc. filed Critical Weldotron Of Delaware, Inc.
Publication of WO1993001978A1 publication Critical patent/WO1993001978A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/06—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it
    • B65B9/073—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it the web having intermittent motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/221—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip
    • B29C65/224—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip being a resistive ribbon, a resistive band or a resistive strip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/38—Impulse heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B29C65/7451—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/133—Fin-type joints, the parts to be joined being flexible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • B29C66/81811—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8183—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal conducting constructional aspects
    • B29C66/81831—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal conducting constructional aspects of the welding jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8187—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects
    • B29C66/81871—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects of the welding jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/16—Applying or generating heat or pressure or combinations thereof by rotary members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/303—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes reciprocating along only one axis
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7371—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73715—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable heat-shrinkable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • B29C66/81417—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled being V-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8185—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps comprising means for compensating for the thermal expansion of the welding jaws or of the clamps

Definitions

  • the present invention concerns the field of sealing and packaging apparatuses and methods, and particularly the field of stretch film sealing and packaging.
  • Stretch film sealing and packaging is widely used to package various food products ranging from produce to fresh meat.
  • Stretch film is extensible but resilient, enabling it to be wrapped tightly around a package, and can self-adhere by heat and/or pressure.
  • Such films can be made, for example, from polyethylene, polyvinyl chloride, butadiene rubber, and the like.
  • Such machinery typically includes a vacuum port to pull the trailing flap of film downward, enabling a lower transverse rod moving faster than the conveyor belt on which the package is moving to fold the flap underneath the package.
  • a second vacuum port pulls down the front flap which is folded under the package by a roller or similar means. The package is then transferred to a heated belt or pad to seal the film flaps to the bottom of the package.
  • stretch/shrink film has recently been developed which has characteristics of both stretch and heat shrink films. That is, it has a certain measure of resilience and self-adherence while also having the ability to shrink when subjected to heat.
  • Such film is manufactured by the Cryovac Division of .R. Grace.
  • Conventional stretch wrapping and shrink wrapping machines often do not take full advantage of the properties of stretch/shrink film.
  • the former machines generally do not provide for shrinkage, since the seal of the front and rear flaps on the bottom of the package would be weakened thereby, while the latter generally do not provide for stretching of the film around the product.
  • OBJECTS AND SUMMARY OF THE INVENTION It is therefore an object of the present invention to overcome the shortcomings of prior art stretch film sealing and packaging apparatuses and methods. It is a further object of the invention to conserve film in stretch wrapping applications.
  • a sealing and packaging apparatus comprises a film forming means [section] for forming stretch or stretch/shrink film tightly around a product, and a longitudinal sealing means [section] disposed adjacent to the film forming means [section] for making a longitudinal seal in the side edges of the film along the length of the product.
  • the longitudinal seal is formed bv first tacking the side edges together, then thermal sealing them together, and then chilling the seal.
  • a cross sealer is disposed adjacent to the longitudinal sealing means [section] for cross sealing the film at the front and rear of the product.
  • the cross sealer makes hermetic seals and the film forming [section] means has a protruding pre-stretch member which engages the film and pre-stretches and pre-forms it [in initiation of] as an initial step in forming the film around the product.
  • the film used is stretch/shrink film, a device for heat shrinking the film around the product [is] may be disposed adjacent to the cross sealer.
  • a method of sealing and packaging [an item] a product in film comprises the steps of dispensing the film, forming the film around the item, bringing the side edges of the film together in a longitudinal seam, and sealing the longitudinal seam by first tacking the side edges together then heat sealing the edges together to form the longitudinal seal, and then chilling the seal.
  • the film is cross sealed at the ends of the product [item] .
  • the cross seal is preferably hermetic[, and the step of sealing the longitudinal seam preferably includes making a tack seal in the seam, thermally sealing the seam, and quickly cooling the seam] .
  • FIG. 1 is a perspective view of an example of a sealing and packaging apparatus according to the present invention
  • FIG. 2 is a side elevational view of the sealing and packaging apparatus of FIG. 1;
  • FIG. 3 is a top plan view of the sealing and packaging apparatus of FIG. 1;
  • FIG. 4 is a schematic side view along line 4-4 in FIG. 3;
  • FIG. 5 is a top view along line 5-5 in FIG. 2;
  • FIG. 6 is a side view along line 6-6 in FIG. 5;
  • FIG. 7 is a side view along line 7-7 in FIG. 5;
  • FIG. 8 is a side view along line 8-8 in FIG. 5; and
  • FIG. 9 is a side view in cross section of an example of a cross seal section used in the sealing and packaging apparatus of FIG. 1.
  • Figs. 1 to 3 the present invention is shown in connection with a machine 10 which seals and packages products 11 (shown in Fig. 2) in stretch or stretch/shrink film.
  • Products 11 move from an upstream end of the machine 10 (i.e. , from the left hand side in FIG. 2 ) to a downstream end (i.e.. to the right hand side in FIG. 2) .
  • the machine 10 forms stretch film around the product .11 and makes a longitudinal thermal lap seal under the product, and makes hermetic cross seals in the film upstream and downstream of the product [at the front and rear] instead of folding large flaps of film under the product.
  • the cross seals made by the machine 10 are much less susceptible to leakage than folding flaps of film on the bottom of the product [package] , and also reduce the amount of film needed. Additionally, the footprint of the machine 10 is relatively small since no machinery for folding down flaps is required.
  • the machine 10 comprises a product infeed means [section] 10a, a film dispensing means [section] 10b, a film forming means [section] 10c, a longitudinal seal means [section] lOd, a cross seal means [section] lOe, and a package outfeed [section] means lOf.
  • a control panel 21 displays information and receives input from the operator.
  • a product loading table 12, supported by stanchions 13, is disposed in the product infeed [section] means 10a.
  • the loading table 12 comprises two side platforms 12a and 12b and an infeed conveyor 14, which comprises a flighted chain lug conveyor in the preferred embodiment.
  • the side platforms 12a, 12b are side adjustable by means of a handle 15 in order to accommodate differing widths of products 11 [packages] placed on the infeed conveyor 14.
  • Control buttons 16, comprising, e.g., start, stop, reset, and emergency stop buttons, are disposed on the end of the loading table 12.
  • a photo cell pair 19, which detects the beginning and ending of the products .11 as they go through the infeed conveyor 14, is placed on the loading table for proper indexing of the products with any printing on the packaging film.
  • the means [sections] 10b, 10c, lOd, lOe, and lOf of the machine 10 are mounted on a support housing 17, which supports the operative components of the machine 10 and houses machinery such as drive motors and the like.
  • a film roll 18 dispensing single wound stretch film 20 is supported above the machine 10 by a mounting assembly 22, comprising a free wheeling support roller 22a and a drive roller 22b.
  • the drive roller 22b rotates under the power of a motor (not shown) , unwinding the film 20 from the film roll 18 at an appropriate speed.
  • the motor speed is adjustable.
  • Guide rods 24 are disposed on the side of the film roll 18 and operate to center the [latter] film roll on the mounting assembly 22.
  • a handle 26 disposed at the end of the support roller 22a (Figs. 1 to 3) adjusts the guide rods
  • a pinch roller 28 is pressed against the drive roller 22b to guide the film out of the film dispensing section 10b.
  • a bottom transport belt 29 disposed on the housing 17 moves the product 11 from the infeed conveyor 14 through the film forming means 10c.
  • Two opposing protruding members, preferably pre-stretch rollers 30 are disposed just below the pinch roller 28 to pre-stretch the film 20 and shape the tube of film formed around the product 11.
  • Film feeding belts 32 comprising upper feeding belts 32a and lower feeding belts 32b constructed of, e.g., polycord, are disposed adjacent to the pre-stretch rollers 30 and are driven by rollers 34.
  • the feeding belts 32 are sloped downwardly as they proceed downstream [from their intake end] such that they catch [the] side edges of the film 20 at a [above the] level [of] above the top of the product 11 and force [them] the side edges downstream [forward] and vertically downward, stretching the film and making it taut, and aiding in the formation of a film tube around the product 11.
  • the film feeding belts 32 have an output end
  • edge guides 38 having intake ends 138 located at the upstream ends of the guides cooperate with the feeding belts 32 in guiding the film around the product 11.
  • the edge guides 38 comprise diagonal slots cut into plates 39 located downstream of [forwardly adjacent to] the product transport belt 29 and the feeding belts 32.
  • the edge guides 38 are oriented diagonally inward such that [while] the[ir] intake ends 138 are located adjacent to the feeding belts 32 and are relatively widely spaced from each other[, e]_.
  • Each edge guide 3JJ. approaches the other culminating in an intersection 43.
  • the intake ends 138 of the edge guides 38 are located at the output ends 132 [outtake] of the feeding belts 32 such that they receive the film edges from the feeding belts [latter].
  • the edge guides 38 guide the edges together under the product, surrounding the product with film.
  • Film centering belts 40 having upstream ends and downstream ends, are driven by rollers 41 located at the upstream ends. [at their intake end, ] The upstream end of the film centering belts 40 are [also] disposed at the [outtake] output ends 132 of the feeding belts 32, underneath the edge guides 38, and cooperate with the edge guides [latter] by catching the side edges of the film under the product and bringing them together for sealing [in] by the longitudinal seal [section] means lOd.
  • the film forming [section] means 10c may be modified by, e.g., locating the feeding belts 32 lower and placing the edge guides 38 adjacent to the feeding belts 32. In this manner, the feeding belts 32 themselves would take the film edges significantly below the product while the edge guides 38 simultaneously bring the film edges together.
  • the product transport belt 29 introduces the product 11 into the longitudinal seal [section] means lOd, where side package transport belts 46 disposed on either side of the product 11 move the product without interfering with the longitudinal sealing taking place on the bottom of the product.
  • the side belts 46 also keep the film 20 taut around the top and sides of the product.
  • the plates 39 support the product through the seal section lOd, while a center edge guide slot 42 emerging from the intersection 43 of the edge guides 38 guides the edges of the film through the seal [section] means lOd.
  • the edges of the film are brought together at the intersection 43 [outtake end of the centering belts 40].
  • a lap seal is then made on the edges of the film [in] by; the longitudinal sealing [section] means lOd.
  • the belts 40 are driven also by a tack seal roller assembly 50, which comprises a drive roller 50a and an idler roller 50b ⁇ _ [pressed]
  • the drive roller 50a and the idler roller 50b press the belts 40 against each other beneath the intersection 3. thereby pressing the film edges together and forming a tack seal.
  • a chill roller assembly 54 is disposed [forwardly] downstream and adjacent to the seal roller assembly 52 and comprises a drive roller 54a and an idler roller 54b, each with a peripheral surface, 55a and 55b respectively.
  • One or both of the rollers 54a, 54b is cooled to chill the thermal seal made in the film by the thermal seal assembly 52 in order to approximate a hermetic impulse seal.
  • rollers 54a, 54b are slanted to tilt [angle] the sealed edges of the film up, away from vertical.
  • a roller 53 is disposed just [forward] downstream of the chill roller assembly 54 to tilt [turn] the lap seal to horizontal, folding [90 degrees, laying] it flat against the bottom of the product 11.
  • the center edge guide slot 42 terminates above the roller 53, and is curved [angled] slightly to one side at its downstream end to help guide the lap seal against the product.
  • the roller assemblies 50, 52, and 54 can comprise various types of rollers, including those having a flat sealing flange or multiple sealing flanges, or those having a combination seal, flange and knife for cutting excess film during sealing.
  • the number and/or location of the rollers can also be varied.
  • Some illustrative types of rollers which can be used in the roller assemblies are disclosed in my U.S. patent application entitled “SEALING AND PACKAGING METHOD AND APPARATUS,” serial no. 07/725.009 filed on July 2. 1991 [or about the filing date of this application] and commonly assigned to the assignee hereof, the contents of which are hereby incorporated by reference as though fully set forth herein. That application also discloses a planetary sealing method suitable for use in the present invention.
  • the cross sealer 55 preferably is of the box motion type, meaning that it moves downstream with the movement of the product 11 during sealing, and back upstream after sealing to begin the next seal. Thus the continuous movement of the product 11 through the machine 10 is not interrupted.
  • the inner rollers 49 supporting the conveyor belt 47 move back and forth with the cross sealer 55 to allow the conveyor belt 47 to move the product forward while accommodating the lateral movement of the cross sealer 55.
  • the cross sealer 55 which produces a hermetic cross seal, comprises a pair of upper U-shaped seal bars 56a and 56b and a pair of lower U-shaped seal bars 58a and 58b.
  • Rods 57a and 57b extend from the bottom of seal bars 58a and 58b, respectively, into the machine 10.
  • Springs 61a and 61b are mounted between the seal bars 58a and 58b and the machine 10 on the rods 57a and 57b.
  • Sealing element assemblies 62a and 62b are mounted in the upper seal bars 56a and 56b, and sealing element assemblies 64a and 64b are mounted in the lower seal bars 58a and 58b.
  • Each of the sealing element assemblies 62a f 62b, 64a, 64b has a cooling passage 65 through which flows cooling liquid.
  • Sealing elements 66 comprising nichrome ribbons in the preferred embodiment, are disposed in opposing relationship on each of the element assemblies 62a, 62b [and] , 64a, 64b.
  • Each sealing element 66 is spring loaded at the ends of the element assembly upon which it is mounted (spring loading not shown) , to allow for thermal expansion of the elements 66 during sealing.
  • the sealing elements 66 are coated with a suitable material, such as TEFLON, to keep them from sticking to the film [14] 2J) during sealing.
  • a barrier [film] (not shown) made of polyamide or other suitable material is placed between the sealing elements 66 and the element assemblies 62a, 62b and 64a, 64b.
  • Polyamide [film] barrier electrically insulates the elements 66 from the element assemblies 62a, 62b and 64a, 64b, but thermally conducts, allowing the element assemblies to act as heat sinks to cool the elements 66 quickly in order effectively to carry out impulse sealing.
  • a blade 74 is vertically disposed between the upper seal bars 62a and 62b for cutting the film between the seal bars after sealing is completed.
  • An air cylinder assembly 76 is attached to the blade 74 to lower and raise the blade
  • a proximity switch or like device (not shown) is provided to keep the upper element assemblies 62a and 62b from inadvertently pressing against the lower element assemblies 64a and 64b before the seal bars 56a, 56b and 58a, 58b are in sealing position, as is known in the art.
  • the conveyor belt 47 conveys the package to the package outfeed [section] means lOf.
  • the front and rear cross seals are made close to the product 11 so that no large flaps of film are left at the front and rear of the product.
  • Packaging is now complete, since the flaps of film at the cross seals are small such that they need not be folded onto the product either for aesthetic or functional reasons.
  • the flaps can of course be thus folded, if desired, by any suitable means known in the art. Since no large excess flaps of film are used, the use of the machine 10 results in a considerable savings in film.
  • the package is preferably conveyed by the outfeed means [section] lOf to a heat shrink tunnel 200 or similar apparatus to further tighten the film around the product by shrinkage. Since the cross seals are thermal seals, they will be strong enough to withstand this procedure.
  • the infeed conveyor 14 carries a series of products 11 into the film forming means [section] 10c.
  • Film 20 is dispensed from the roll of film 18 through the pinch roller 28, and the film is made taut and is formed by the pre-stretch rollers 30.
  • the products 11 are inserted under the film, and the feeding belts 32 tighten the film and bring it down on the top and upper sides of the products 11.
  • the edge guides 38 and film centering belts 40 then guide the edges of the film under the product, and a lap seal [takes place] is formed [in] by the longitudinal sealing means [section] lOd. After the lap seal is [per]formed and the seal turned against the products 11, the products 11 are encased in a tube of film 20.
  • the products are then conveyed to the cross seal means [section] lOe.
  • a cross seal is then [per]formed in front of the product.
  • the upper seal bars 56a and 56b are lowered into sealing position onto the lower seal bars 58a and 58b, and the air cylinder assembly 72 presses the upper element assemblies 62a and 62b against the lower element assemblies 64a and 64b, pressing the layers of film between the upper and lower sealing elements 66, which are cool when they are first brought together.
  • the elements are then pulsed for a preset duration and allowed to cool, and the element assemblies 62a, 62b and 64a, 64b and seal bars 56a, 56b and 58a, 58b are separated after the blade 74 cuts the film 2) between the cross seals.
  • the product then moves through the cross sealer 5_5 [50] and the rear cross seal is made.
  • the cross seal means [section] lOe takes up little space, and thus the footprint of the machine 10 is considerably less than if machinery was added to fold front and rear flaps under the package.
  • a heat shrink tunnel 200 may be added if stretch/shrink film is used. If desired, a presser may be employed adjacent to the cross sealer to press any excess air out of the package before the final seal is made.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)

Abstract

Dispositif (10) de conditionnement et de scellement au moyen d'un film extensible comprenant un élément d'amenée du produit (10a), un distributeur de film (10b), une section de constitution du film (10c), un élément de scellement longitudinal (10d) et un élément de scellement transversal (10e). Le produit (11) est amené vers la section de constitution du film (10c) où le film (20) provenant du distributeur de film (10b) est placé autour dudit produit (11). L'élement de scellement longitudinal (10d) constitue ensuite un scellement à recouvrement dans le film (20) à la base du produit (11), et l'élément de scellement transversal (10e) forme des scellements transversaux aux parties avant et arrière dudit produit (11). Les scellements transversaux permettent d'éliminer la nécessité de placer des grands plis de film sur le produit (11), afin d'empêcher les fuites, ce qui permet d'économiser le film (20).
PCT/US1992/005544 1991-07-25 1992-07-02 Procede et dispositif de conditionnement et de scellement au moyen d'un film extensible et avec scellement transversal WO1993001978A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US73599691A 1991-07-25 1991-07-25
US735,996 1991-07-25

Publications (1)

Publication Number Publication Date
WO1993001978A1 true WO1993001978A1 (fr) 1993-02-04

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DE102006001594A1 (de) * 2006-01-11 2007-07-12 Beck Packautomaten Gmbh & Co. Folien-Verpackungsmaschine für Packgutstücke wechselnder Größe
US20140047796A1 (en) * 2012-08-15 2014-02-20 Air-Bag Packing Co., Ltd. Continuous sealing device and storing and feeding table thereof
CN113788198A (zh) * 2021-11-15 2021-12-14 新沂久盛纺织科技有限公司 一种服装包装封口机

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006001594A1 (de) * 2006-01-11 2007-07-12 Beck Packautomaten Gmbh & Co. Folien-Verpackungsmaschine für Packgutstücke wechselnder Größe
US20140047796A1 (en) * 2012-08-15 2014-02-20 Air-Bag Packing Co., Ltd. Continuous sealing device and storing and feeding table thereof
US9566757B2 (en) * 2012-08-15 2017-02-14 Air-Bag Packaging Co., Ltd. Continuous sealing device and storing and feeding table thereof
CN113788198A (zh) * 2021-11-15 2021-12-14 新沂久盛纺织科技有限公司 一种服装包装封口机

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