JPS59127033A - thermal copying device - Google Patents

Abstract

PURPOSE:To reduce the size of a main capacitor and to realize a small-sized machine, and to take a copy of even a book as an original, by moving a flash discharge tube as a light source and irradiating a thermal copying member divisionally. CONSTITUTION:While the thermal copying member consisting of an original 2 and a thermal sheet 3 is brought into press contact with an infrared transmissive base plate 4 by a pressure plate 1, the xenon discharge tube 6 in a light source box 5 emits light at a position A firstly to expose the thermal copying member at this part and then moves to a position B and emits light again to expose the thermal copying member at this part, thus exposing the thermal copying member uniformly at positions A, B, C and D in order. Consequently, the thermal copying member is exposed uniformly because the light source box 5 moves to turn on the xenon discharge tube 6 divisionally, and a large-capacity main capacitor is unnecessary to reduce the size of the machine, which is manufacture at low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermal copying apparatus that performs one-part flash exposure.

Concave - Conventionally, in a thermal copying apparatus in which an infrared lamp is moved as an exposure light source to expose the entire surface of a thermal copying member,
It is very difficult to control the amount of heat applied to the thermal copying member and the speed of movement of the infrared lamp, making it difficult to obtain proper exposure. To overcome this drawback, if a flash discharge tube is used, the amount of heat rays generated during a flash is almost the same each time, so it is easy to control the amount of heat rays, and it is possible to obtain appropriate exposure. It has the advantage of higher resolution than thermal copying devices that use lamps, but it requires a large amount of energy to fog the entire surface of the thermal copying material using a flash discharge tube, so the main capacitor As the capacity increases, the device becomes larger and more expensive.

-'' - Hajime The present invention was made in consideration of these drawbacks.
The purpose is to provide a thermal copying device that can reduce the capacitance of the main capacitor by moving the flash discharge tube that is the light source and dividing the thermal copying member and irradiating it with flash light, thereby making the device more compact. It is something to do.

~Natsuzo~ The configuration of the present invention will be described below based on an embodiment.

The figure shows a schematic configuration diagram of a thermal copying apparatus according to an embodiment of the present invention, in which 1 is a suppression plate, 2 is a document, 3 is a thermal sheet,
4 is an infrared transmitting substrate (for example, glass), 5 is a light source box, 6 is a xenon discharge tube, and 7 is a light source irradiation window.

In the thermal copying apparatus of this embodiment configured as described above, the xenon discharge tube 6 of the light source box 5 is first pressed while the thermal copying member consisting of the original 2 and the thermal sheet 3 is pressed onto the infrared transmitting substrate 4 by the pressing plate 1. At position 1iffiA, light is emitted to expose this part of the thermal copying member, then move to position 2, and the xenon discharge tube is emitted again to expose this part 9 of the heat-sensitive copying member, and so on. , B, C, and D, uniform exposure is obtained. After completing this series of exposures, the light source box 5 is moved to position A.
Returning to , the movement of the light source box 5 is performed by motor control.

In this embodiment, the light source box 5 is moved in this way, and the xenon discharge tube 6 is divided to emit light, so that the thermal copying member can be uniformly exposed, and a large-capacity main capacitor is not required. This has the advantage that the device can be miniaturized and manufactured at low cost.

In the above embodiment, the original 2 with a heat ray absorption image and the heat sensitive sheet 3 were used as the thermal copying member, but a thermal copying member in which a transfer paper and an original with a heat ray absorption image are stacked on plain paper, or plain paper A thermal copying member in which a thermal sheet having a thermally transferred image and a heat ray absorbing sheet are stacked can be used.

As is clear from the above description, the present invention allows the main capacitor to be made smaller by moving the flash discharge tube and irradiating the thermal copying member in parts, thereby making the apparatus smaller. It has the advantage of being inexpensive, and it also has the advantage of being able to make copies even if the manuscript is a book.

[Brief explanation of drawings]

The figure is a schematic diagram of a thermal copying apparatus according to an embodiment of the present invention. ...pressing plate, 2...manuscript, 3...thermal sheet, 4
...Infrared transmitting substrate (e.g. glass), 5...Light'
source box, 6...xenon discharge tube. 7...Light source irradiation window. Patent applicant Ricoh Co., Ltd.

Claims (1)

[Claims] In a flash-type thermosensitive copying device that obtains copies by irradiating a flash light onto a heat-sensitive copying member that performs copying by selective absorption of heat rays or selectively copies images through full-scale absorption of heat rays, a flash light source is used as a light source. A thermal copying apparatus characterized in that the thermal copying member is irradiated with flash light in parts by moving a discharge tube.