JPS63284550A - Pressure developing device - Google Patents

Abstract

PURPOSE:To enable exertion of a specified pressurizing force over the entire width of a sheet to be pressure-developed and to eliminate unequal development by subjecting the sheet to the pressure development while moving small-diameter press rollers in the direction intersecting with the feed direction of the sheet surface. CONSTITUTION:The sheet to be pressure-developed consisting of photosensitive microcapsule paper 13 subjected to a prescribed exposing process and color developing paper 14 is moved along a platen face 8 in the direction orthogonal with the moving direction of a pair of the small diameter press rollers 5. A pair of chains 6 are moved by driving of a motor 2 at this time, and the rollers 5 pass on the paper surface according to the movement thereof, but the rollers 5 are pressed by roller pressing rails 7 and, therefore, the latent image of the microcapsule paper 13 is eventually pressure-developed on the color developing paper 14. The pressurizing force uniform in the transverse direction of the sheet is thereby obtd. and the generation of the unequal development is obviated; in addition, the travel length of the rollers is required only in the transverse direction of the sheet and, therefore, the size of the device is reduced.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention is a method of stacking a photosensitive microcapsule paper on which a latent photoimage has been formed after a predetermined exposure process and a color developer paper coated with a color developer. This invention relates to a pressure developing device that forms an image on a color developing paper by applying pressure together.

[Prior Art] As shown in FIG. 4, a conventional pressure developing device of this type has small-diameter pressure rollers 21 and 21 attached to both ends of an arm 20 that is longer than the width of the sheet of paper. A pressure developing device is known that obtains the necessary pressing force with a relatively small force by applying the pressing force to the paper surface while rotating.

[Problems to be Solved by the Invention] In the above-mentioned pressure developing device, the small diameter pressure roller rotates and moves even in a plane area that is not actually involved in pressure development, so the device becomes large and the width of the paper increases. There is a problem in that the force applied to the paper is uneven between the edges and the center.

[Object of the Invention] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a compact pressure developing device that applies a uniform pressing force in the width direction of the paper being pressed. purpose.

[Means for Solving the Problems] In order to achieve this object, the pressure developing device of the present invention has a pressure developing device in which a sheet surface pressure roller is applied to a surface of an image sheet to be pressed that is sent in a certain direction along a platen surface. The pressure roller is arranged to be movable in a direction intersecting the sheet feeding direction, and a drive source is connected to the pressure roller to guide the movement of the pressure roller and urge the pressure roller against the sheet surface. The gist is that the device is equipped with a pressure rail that presses and biases the device.

[Function] According to the present invention having the above configuration, since the small-diameter pressure roller performs pressure development on the surface of the sheet to be pressed and developed while moving in a direction intersecting the feeding direction of the sheet, the surface of the sheet to be pressed is developed. A constant pressing force is applied to the surface of the pressure development sheet over its entire width, thereby avoiding the problems of uneven development and uneven development.

[Embodiment] An embodiment of the present invention will be described below with reference to Figs. An endless chino 6 is stretched between both sprockets 3 and 4.As shown in Fig. 2 or 3, two driving sprockets 3 and two driven sprockets 4 are provided. Two endless chains 6 are also mounted in parallel with a small interval between them.An appropriate number (two in this embodiment) of endless chains 6 are inserted at regular intervals between the endless chains 6, 6. A small diameter pressure roller 5°5 is mounted on the shaft.

Each of the small diameter pressure rollers 5, 5 has a rotating double structure as shown in FIG. That is, the inner rotating body 1 is rotatably attached to a base shaft 10 that is mounted between the chines 6, 6, and the outer rotating body 12 is also rotatably attached to the outer periphery of the inner rotating body 1. Furthermore, a roller presser rail 7 is connected to the support frame 1 via an elastic member 9.
is provided protrudingly, and the outer rotating body 12 of the small diameter pressure roller 5 is loosely fitted into the concave groove 7a of the roller presser rail 7, and the circumferential surface of the inner rotating body 11 is brought into contact with the roller presser rail 7. The small diameter pressure roller 5 is configured to be pressed against the surface of the platen 8 by the elastic force of the roller presser rail 7 via the elastic member 9. Note that the drive shaft 1
A drive motor 2 is connected to the drive motor 5.

However, in the pressure developing device configured in this way, the pressurized developing sheet consisting of the photosensitive microcapsule paper 13 and the color developing paper 14 that have undergone a predetermined exposure process moves the surface of the platen 8 in the direction indicated by the arrow in FIG. direction (direction perpendicular to the moving direction of the small diameter pressure rollers 5, 5). At that time, the motor 2 is driven to move the chenos 6, 6 in the direction of the arrow in FIG.
Since the roller 5 rotates while being pressed onto the paper surface by the roller presser rail 7, the microcapsule paper 13
The upper latent image is developed under pressure on the color developer paper 14.

[Effects of the Invention] According to the pressure developing device of the present invention, a uniform pressing force can be obtained in the width direction of the pressurized development sheet, so that a high-quality image without uneven development can be obtained. Furthermore, since it is sufficient to ensure a path length for the small-diameter pressure roller to move across the sheet in the width direction, the diameter of the apparatus can also be reduced.

[Brief explanation of the drawing]

FIG. 1 is a front view of a device according to an embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is an enlarged sectional view taken along the line A-A in FIG.
FIG. 4 is a schematic configuration diagram of a conventional device. 1; Support frame, 2; Drive motor, 3; Main drive sprocket, 4; Driven sprocket, 5: Pressure roller, 6:
Cheno, 7; Roller presser rail, 8; Platen, 9; Elastic member, 13; Microcapsule paper, 14; Color developer

Claims (1)

[Claims] A sheet surface pressure roller is disposed on the surface of the pressurized development sheet that is fed in a certain direction along the platen surface, so as to be movable in a direction intersecting the sheet feeding direction, and a drive source is attached to the pressure roller. A pressure developing device characterized in that it is equipped with a press rail that is connected to the press rails, guides the movement of the press roller, and elastically presses the press roller against the sheet surface.