WO1991011330A1 - A blanket for lining the cylinders of a printing system - Google Patents
A blanket for lining the cylinders of a printing system Download PDFInfo
- Publication number
- WO1991011330A1 WO1991011330A1 PCT/EP1990/002072 EP9002072W WO9111330A1 WO 1991011330 A1 WO1991011330 A1 WO 1991011330A1 EP 9002072 W EP9002072 W EP 9002072W WO 9111330 A1 WO9111330 A1 WO 9111330A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- blanket
- film
- elastomeric layer
- cylinders
- base
- Prior art date
Links
- 238000007639 printing Methods 0.000 title claims abstract description 20
- 229920002620 polyvinyl fluoride Polymers 0.000 claims abstract description 9
- -1 polyethylene Polymers 0.000 claims abstract description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 5
- 239000004698 Polyethylene Substances 0.000 claims abstract description 3
- 229920000728 polyester Polymers 0.000 claims abstract description 3
- 229920000573 polyethylene Polymers 0.000 claims abstract description 3
- 238000004073 vulcanization Methods 0.000 claims description 4
- 238000005097 cold rolling Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 2
- 229920000915 polyvinyl chloride Polymers 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 239000013536 elastomeric material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000007775 late Effects 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
- B41N10/02—Blanket structure
- B41N10/04—Blanket structure multi-layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
- B41N2210/02—Top layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
- B41N2210/14—Location or type of the layers in multi-layer blankets or like coverings characterised by macromolecular organic compounds
Definitions
- Printing machines usually include a large number of cylinders performing a variety of functions.
- many cylinders are arranged to act in direct contact with the paper, to either transfer ink thereto (impression cylinders) or perform some other functions, typically such as paper conveyance or feed-in functions (transport cylinders) and counteracting the pressure from the impression cylinders (pressure cylinders).
- the aforesaid cylinders are to perform different functions, they may be lined with the same blanket type, comprising a base and an elastomeric layer.
- This blanket which has been specifically developed to fit.
- the requirements of the impression cylinders is frequently employed on the pressure and transport cylinders as well, in order to provide similar mechanical and dynamic characteristics (specifically, deformabi Lity and peripheral velocity) for all the cylinder pairs acting on the paper and ensure, therefore, the highest possible paper handling and printing accuracy.
- the problem underlying this invention is to provide a lining blanket which is not easily fouled, and in any case, can be readily washed clean when used on pressure and transport cylinders without impairing the printing accuracy.
- a blanket for lining the cylinders of a printing system which comprises a base and an elastomeric layer and is characterized in that it further comprises an outer film on " its elastomeric layer side, said film having low affinity to printing ink.
- the film does not affect the elastic characteristics of the blanket, which depend on the base . and the elastomer layer, but reduces drastically the chances of ink particles and paper fibrous matter becoming stuck to the blanket.
- Said film can be formed from a suitable polymeric material, to be selected preferably from polyvinyl chloride (PVC), polyester, polyethylene, polyvinyl fluoride (PVF), and polytetrafluoroethylene (PTFE). It has been found that PVF yields excellent results.
- PVC polyvinyl chloride
- PVF polyvinyl fluoride
- PTFE polytetrafluoroethylene
- the film is applied to the elastomeric layer by a cold rolling process before subjecting the elastomeric layer to vulcanization. In this way, perfect adhesion of the film on the underlying elastomeric layer can be achieved.
- the f lm may be structurally independent of the elastomeric layer/base, assembly and be simply combined therewith during the cylinder preparation/assembly stage.
- FIGS 1 and 2 are fragmentary perspective views showing schematically two printing systems which employ rolls lined with the blanket of this invention.
- Figure 3 is a sectional view through a blanket according to the invention.
- FIG. 1 Shown schematically in Figure 1 is a detail view of a printing system S, in particular a roto-offset printing system comprising a unit S1 for printing in four colors on a side A of paper C, and a unit S2 for printing in a single color on the other side B of the paper C.
- a printing system S in particular a roto-offset printing system comprising a unit S1 for printing in four colors on a side A of paper C, and a unit S2 for printing in a single color on the other side B of the paper C.
- Each unit, S1 and S2 comprises impression cylinders R and pressure cylinders P lined with a blanket 2 in accordance with this invention.
- Figure 2 is instead a detail view of a different printing system S', in particular a flexographic printing system, comprising a unit S' for printing in a single color on the two sides A' and B' of paper C*, and a unit S2' for printing in four colors on just the side A".
- Each unit, S1', S2' comprises impression cylinders R' and pressure cylinders P 1 lined with the blanket 2.
- the blanket 2 comprises a base 3 and an elastomeric layer 4; the base 3 consists, in turn, of a plurality of plies 5 interleaved with layers 6 of an elastomeric material.
- One of the layers 6 may be a so-called compressible layer comprising a microporous structure with closed or open cells.
- the blanket 2 further comprises an outer film 10, applied onto the elastomericLayer 4 and formed from polyvinyl fluoride (PVF).
- PVF polyvinyl fluoride
- the blanket 2 For making the blanket 2, use is made, at an initial stage, of a conventional method whereby the base 3 and overlying elastomer
- That method includes sequential steps for coating the plies with elastomeric material, and the coupling of further plies together by a cold rolling process.
- the film 10 Prior to subjecting the base 3 with the layer 4 to vulcanization in order to stabi lize -the elastomeric layer 4, the film 10 is cold rolled thereon. Thereafter, the green blanket 2 is subjected to vulcanization, thereby accomplishing at one time stabilization of the elastomeric layer 4 and the anchoring of the film 10 thereon.
- the blanket 2 so obtained has an outward surface which has an extremely low affinity to printing ink and can be readily washed clean.
- the film 10 provides excellent resistance to surface abrasion, as well as excellent chemical resistance to the action of the solvents usually employed with printing systems.
Landscapes
- Printing Plates And Materials Therefor (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
Abstract
The blanket (2) comprises a base (3), an elastomeric layer (4), and an outer film (10) applied over the elastomeric layer (4); the film (10) has low affinity to printing ink and is formed from PVC, polyester, polyethylene, PTFE, or PVF, preferably from PVF.
Description
A blanket for lining the cylinders of a printing sys tem
DESCRIPTION Tec nipca_l_Fτ_eJ.d Thi s i nventi on re lates to a b lanket for li ni ng the cy li nders of a pri nt i ng system, compri si ng a base and an e lastomeri c layer .
______2_______
Printing machines usually include a large number of cylinders performing a variety of functions. In particular, many cylinders are arranged to act in direct contact with the paper, to either transfer ink thereto (impression cylinders) or perform some other functions, typically such as paper conveyance or feed-in functions (transport cylinders) and counteracting the pressure from the impression cylinders (pressure cylinders).
Even though the aforesaid cylinders are to perform different functions, they may be lined with the same blanket type, comprising a base and an elastomeric layer. This blanket, which has been specifically developed to fit. the requirements of the impression cylinders, is frequently employed on the pressure and transport cylinders as well, in order to provide similar mechanical and dynamic characteristics (specifically, deformabi Lity and peripheral velocity) for all the cylinder pairs acting on the paper and ensure, therefore, the highest possible paper handling and printing accuracy.
This option clashes, however, with the productivity of the system, due to the frequent stops necessary to clean the pressure and transport rolls, which pick up from the freshly printed paper large amounts of ink and paper fiber particles.
£i__i2§_.E_._2l________2_
The problem underlying this invention is to provide a lining blanket which is not easily fouled, and in any case, can be readily washed clean when used on pressure and transport cylinders without impairing the printing accuracy.
This problem is solved, according to the invention, by a blanket for lining the cylinders of a printing system, which comprises a base and an elastomeric layer and is characterized in that it further comprises an outer film on" its elastomeric layer side, said film having low affinity to printing ink.
The film does not affect the elastic characteristics of the blanket, which depend on the base . and the elastomer layer, but reduces drastically the chances of ink particles and paper fibrous matter becoming stuck to the blanket.
Said film can be formed from a suitable polymeric material, to be selected preferably from polyvinyl chloride (PVC), polyester, polyethylene, polyvinyl fluoride (PVF), and polytetrafluoroethylene (PTFE). It has been found that PVF yields excellent results.
Advantageously, the film is applied to the elastomeric layer by a cold rolling process before subjecting the elastomeric layer to vulcanization. In this way, perfect adhesion of the film on the underlying elastomeric layer can be achieved.
Alternatively, the f lm may be structurally independent of the elastomeric layer/base, assembly and be simply combined therewith during the cylinder preparation/assembly stage.
Further features and advantages of a blanket according to the invention will become apparent from the following detailed •• description of a preferred embodiment thereof, given with
reference to the accompanyi ng drawi ngs .
____________E__2Q_2______i___
In the drawings:
Figures 1 and 2 are fragmentary perspective views showing schematically two printing systems which employ rolls lined with the blanket of this invention; and
Figure 3 is a sectional view through a blanket according to the invention.
______2____2___________2_____________i2_
Shown schematically in Figure 1 is a detail view of a printing system S, in particular a roto-offset printing system comprising a unit S1 for printing in four colors on a side A of paper C, and a unit S2 for printing in a single color on the other side B of the paper C. Each unit, S1 and S2, comprises impression cylinders R and pressure cylinders P lined with a blanket 2 in accordance with this invention.
Figure 2 is instead a detail view of a different printing system S', in particular a flexographic printing system, comprising a unit S' for printing in a single color on the two sides A' and B' of paper C*, and a unit S2' for printing in four colors on just the side A". Each unit, S1', S2' comprises impression cylinders R' and pressure cylinders P1 lined with the blanket 2.
The blanket 2 comprises a base 3 and an elastomeric layer 4; the base 3 consists, in turn, of a plurality of plies 5 interleaved with layers 6 of an elastomeric material. One of the layers 6 may be a so-called compressible layer comprising a microporous structure with closed or open cells.
The blanket 2 further comprises an outer film 10, applied
onto the elastomericLayer 4 and formed from polyvinyl fluoride (PVF).
For making the blanket 2, use is made, at an initial stage, of a conventional method whereby the base 3 and overlying elastomer
That method includes sequential steps for coating the plies with elastomeric material, and the coupling of further plies together by a cold rolling process.
Prior to subjecting the base 3 with the layer 4 to vulcanization in order to stabi lize -the elastomeric layer 4, the film 10 is cold rolled thereon. Thereafter, the green blanket 2 is subjected to vulcanization, thereby accomplishing at one time stabilization of the elastomeric layer 4 and the anchoring of the film 10 thereon.
The blanket 2 so obtained has an outward surface which has an extremely low affinity to printing ink and can be readily washed clean. In addition, the film 10 provides excellent resistance to surface abrasion, as well as excellent chemical resistance to the action of the solvents usually employed with printing systems.
Claims
1. A blanket for lining the cylinders of a printing system, comprising a base (3) and an elastomeric layer (4), characterized in that it further comprises an outer film (10) on its elastomeric Layer (4) side, said film (10) having low affinity to printing ink.
2. A blanket according to Claim 1, characterized in that said film (10) is made of a material selected from a group including polyvinyl chloride (PVC), polyester, polyethylene, polyvinyl fluoride (PVF), and polytetrafLuoroethylene (PTFE).
3. A blanket according to Claim 2, characterized in that said material is PVF.
4. A blanket according to the preceding claims, characterized in that it is formed by cold rolling said film (10) over the elastomeric layer (4) prior to subjecting the elastomeric layer (4) to vulcanization.
5. A blanket according to the preceding claims, characterized in that the film (10) is structurally independent of the elastomeric layer (4)/ base (3) assembly and simply combined therewith during the cylinder making/assembling stage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT19172A IT1238678B (en) | 1990-01-26 | 1990-01-26 | FABRIC FOR COATING OF CYLINDERS OF A PRINTING PLANT, LOW AFFINITY FOR INK |
| IT19172A/90 | 1990-01-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1991011330A1 true WO1991011330A1 (en) | 1991-08-08 |
Family
ID=11155496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1990/002072 WO1991011330A1 (en) | 1990-01-26 | 1990-12-03 | A blanket for lining the cylinders of a printing system |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0511966A1 (en) |
| JP (1) | JPH05503890A (en) |
| AU (1) | AU6961891A (en) |
| IT (1) | IT1238678B (en) |
| WO (1) | WO1991011330A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0629514A1 (en) * | 1993-06-16 | 1994-12-21 | DeMoore, Howard W. | Low affinity coating blanket for rotary offset presses |
| FR2729100A1 (en) * | 1995-01-11 | 1996-07-12 | Reeves Bros Inc | PRINTING BLANKETS FOR METAL EFFECT INK |
| US5860360A (en) * | 1996-12-04 | 1999-01-19 | Day International, Inc. | Replaceable printing sleeve |
| EP0956973A3 (en) * | 1998-05-15 | 2000-02-23 | Heidelberger Druckmaschinen Aktiengesellschaft | Blanket for printing with full transfer of the ink |
| US6514888B1 (en) * | 1994-09-21 | 2003-02-04 | Yamauchi Corporation | Cushioning material for forming press |
| USRE38468E1 (en) | 1996-12-04 | 2004-03-23 | Day International, Inc. | Replaceable sleeve |
| DE102009043921A1 (en) | 2009-09-01 | 2011-03-03 | Contitech Elastomer-Beschichtungen Gmbh | Multilayer sheet and method for its production |
| US9868277B2 (en) | 2001-07-20 | 2018-01-16 | Printguard, Inc. | Anti-marking coverings for printing presses |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2227485A1 (en) * | 1971-06-07 | 1973-01-04 | Ricoh Kk | PRINT CYLINDERS FOR OFFSET PRINTING MACHINES |
| DE2718224A1 (en) * | 1976-05-28 | 1977-12-15 | Rubber Electronic Ind | PRINTING FELT AND PROCESS FOR ITS MANUFACTURING |
-
1990
- 1990-01-26 IT IT19172A patent/IT1238678B/en active IP Right Grant
- 1990-12-03 JP JP3501214A patent/JPH05503890A/en active Pending
- 1990-12-03 WO PCT/EP1990/002072 patent/WO1991011330A1/en not_active Application Discontinuation
- 1990-12-03 EP EP91900746A patent/EP0511966A1/en not_active Withdrawn
- 1990-12-03 AU AU69618/91A patent/AU6961891A/en not_active Abandoned
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2227485A1 (en) * | 1971-06-07 | 1973-01-04 | Ricoh Kk | PRINT CYLINDERS FOR OFFSET PRINTING MACHINES |
| DE2718224A1 (en) * | 1976-05-28 | 1977-12-15 | Rubber Electronic Ind | PRINTING FELT AND PROCESS FOR ITS MANUFACTURING |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0629514A1 (en) * | 1993-06-16 | 1994-12-21 | DeMoore, Howard W. | Low affinity coating blanket for rotary offset presses |
| US6514888B1 (en) * | 1994-09-21 | 2003-02-04 | Yamauchi Corporation | Cushioning material for forming press |
| DE19600736A1 (en) * | 1995-01-11 | 1996-07-18 | Reeves Bros Inc | Printing blankets for metallic effect printing inks |
| GB2296895A (en) * | 1995-01-11 | 1996-07-17 | Reeves Bros Inc | Printing blanket and method for use with platelet-like pigments |
| GB2296895B (en) * | 1995-01-11 | 1998-06-10 | Reeves Bros Inc | Printing blanket and method for use with platelet-like pigments |
| DE19600736C2 (en) * | 1995-01-11 | 2002-06-27 | Reeves Bros Inc | Use of a printing blanket for metallic effect printing inks in offset printing |
| FR2729100A1 (en) * | 1995-01-11 | 1996-07-12 | Reeves Bros Inc | PRINTING BLANKETS FOR METAL EFFECT INK |
| US5860360A (en) * | 1996-12-04 | 1999-01-19 | Day International, Inc. | Replaceable printing sleeve |
| US5983799A (en) * | 1996-12-04 | 1999-11-16 | Day International, Inc. | Replaceable sleeve |
| USRE38468E1 (en) | 1996-12-04 | 2004-03-23 | Day International, Inc. | Replaceable sleeve |
| EP0956973A3 (en) * | 1998-05-15 | 2000-02-23 | Heidelberger Druckmaschinen Aktiengesellschaft | Blanket for printing with full transfer of the ink |
| US9868277B2 (en) | 2001-07-20 | 2018-01-16 | Printguard, Inc. | Anti-marking coverings for printing presses |
| DE102009043921A1 (en) | 2009-09-01 | 2011-03-03 | Contitech Elastomer-Beschichtungen Gmbh | Multilayer sheet and method for its production |
| WO2011026731A1 (en) | 2009-09-01 | 2011-03-10 | Contitech Elastomer-Beschichtungen Gmbh | Multilayer sheet material and method for the production thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| IT9019172A0 (en) | 1990-01-26 |
| JPH05503890A (en) | 1993-06-24 |
| AU6961891A (en) | 1991-08-21 |
| EP0511966A1 (en) | 1992-11-11 |
| IT9019172A1 (en) | 1991-07-27 |
| IT1238678B (en) | 1993-09-01 |
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