JPH0240656A - Image forming device - Google Patents

Abstract

PURPOSE:To form an image of good condition by discriminating the type of a developing paper and carrying out the heat fixing process by setting a copying condition appropriate for its characteristic. CONSTITUTION:The irradiating light from a halogenated lamp 3, after being reflected from an original, after being passed through a filter 8, a lens 9, and reflected by the two reflecting mirrors 11, is formed as an image on a micro capsule paper 37 positioned below an exposure plate 19. At this time, since the capsule paper 37 is traveled, in this case, to the right direction over the exposure plate 19, at the same speed as the traveling speed of the original platen glass 2, the image from the original is formed as a latent image on the capsule paper 37. With this leftward traveling of the original platen 2, a developing paper 38 is taken out from a developing paper cassette 32 by a half moon roller 33, and the already exposed latent image on the capsule paper 37 is developed and transferred on a developing paper 38. After that, the developing paper 38 is heat fixed by a heat fixing device 51 and afterwards emitted from a copying machine 40.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image forming apparatus that forms an image on a photosensitive recording medium based on predetermined image information.

[Prior Art] Conventionally, this type of image forming apparatus irradiates a document with light and forms an image of the reflected light or transmitted light on a photosensitive recording medium through an optical system such as a reflecting mirror, a filter, or a lens. A device is known that is configured to form a latent image or a visible image on the photosensitive recording medium. Specifically, U.S. Patent No. 4399
In the device using the photosensitive pressure sensitive recording medium (consisting of a photosensitive pressure sensitive sheet and color developer paper) proposed in the specification of No. 209,
A latent image is formed by exposure on a photosensitive pressure-sensitive sheet as a photosensitive recording medium, a developer paper is placed on the surface on which the latent image is formed and pressure is applied, and the developer paper is then heated to form the desired developer image. I was getting . This pressure processing is generally called pressure fixing, and a pressure roller is used. The heat treatment is generally called heat fixing, and a heat roller is used.

[Problem to be solved by the invention] However, because the same exposure, pressure, and heat fixing processes have been performed regardless of the characteristics of the color developing paper, images with insufficient transparency, haze, and resolution may be produced. .

The present invention was made in order to solve the above-mentioned problems, and aims to obtain a good image suitable for the characteristics of color developing paper.

[Means for Solving the Problems] In order to achieve this object, the image forming apparatus of the present invention includes a means for determining the type of color developer paper, and a means for setting copying conditions suitable for the characteristics of the color developer paper depending on the type of color developer paper. have the means to do so.

[Operations] According to the present invention having the above configuration, the type of color developing paper is determined, copying conditions suitable for its characteristics are set, and exposure, pressure and heat fixing processes are performed.

[Example] Hereinafter, in order to explain the present invention more specifically, an example will be given and explained.

FIG. 2 is a schematic sectional view of a photosensitive and pressure sensitive copying machine capable of full color copying. Incidentally, a photosensitive paper (consisting of microcapsule paper and developer paper) that enables such copying has been proposed in Japanese Patent Application Laid-Open No. 58-88739, and will not be described in detail here.

As shown in the figure, the photosensitive and pressure-sensitive copying machine 40 is composed of a document table glass 2 and a document table cover 1, the top plate of which is movable in the horizontal direction.A desired document is placed face down on the document table glass 2. Can be placed in any condition. A light source consisting of a halogen lamp 3 extending in a direction perpendicular to the direction of movement of the document table glass 2 and a semi-cylindrical reflecting mirror 4 arranged to surround it is fixed to the upper right side of the copying machine 40. Light is irradiated in a line toward the document table glass 2.

Therefore, the light emitted from the halogen lamp 3 can sequentially illuminate the entire surface of the document table glass 2 from the left end to the right end by moving the document table glass 2 in the left-right direction. The light emitted from the light source passes through the transparent original platen glass 2 and is reflected by the original placed on it. A document table cover 1 is provided to cover the document table.

In addition, in order to use the light emitted from the halogen lamp 3 to irradiate the original with high efficiency, a beam flap 5 is arranged to the left of the light source to reflect the light that is not directly directed toward the original and use it again to irradiate the original. .

A fan 6 and a louver 7 are provided to the right of the halogen lamp to draw air from the outside. As a result, air can be efficiently applied to the document table glass 2. halogen lamp 3
The light reflected from the original placed on the original platen glass 2 passes through the filter 8 and enters the lens 9. The filter 8 is used to change the light transmission characteristics according to the sensitivity characteristics of the microcapsule paper 37 and adjust the color tone of the copied image. The lens 9 is attached to a lens mounting plate 10, and allows minute angle adjustment with respect to the optical path.

The light focused by the lens 9 is redirected by two reflecting mirrors 11 by 180@, and is imaged on a microcapsule paper 37 closely positioned below the exposure table 19. The two reflecting mirrors 11 are fixed to a mirror mounting plate 12, and the optical path length and focus are adjusted by finely adjusting the mounting position of the mirror mounting plate 12.

On the other hand, a long microcapsule paper 37 is wound around the cartridge shaft 14 and housed in a removable cartridge 1°3 disposed below the platen glass 2. It reaches a winding shaft 25 via a roller and a pressure developing device 20.

That is, the microcapsule paper 37 coming out from the lower part of the cartridge 13 is transferred to the feed roller 15 and the Tyco roller 1.
7 and passes below one exposure stage, then is supplied to the pressure developing device 20. Thereafter, the microphone capsule paper 37 that has passed through the pressure developing device 20 is guided to a peeling roller 23 and a meandering adjustment roller 24, and then wound onto a winding seri shaft 25. The unexposed microcapsule paper 37 after leaving the cartridge 13 is maintained in an unexposed state by the light shielding cover 16.

The transport speed of the microcapsule paper 37 is controlled to be constant by the capsule paper feed roller 22, and is made to match the moving speed of the document platen glass 2, so that the microcapsule paper 37 is Latent images of predetermined lines of the document are sequentially formed.

Further, below the pressure developing device 20, a color developer paper cassette 32 is provided that accommodates a cut paper type color developer paper 38. The tip 32a of the developer paper cassette 32 differs depending on the type of developer paper, and a developer paper discriminator 50 fixed to the main body of the copying machine 40 determines the type of developer paper from the shape of the developer paper cassette 32. The color developer paper 38 is taken out one by one by the half-moon roller 33, the leading end of which is aligned by the color developer paper roller 34 and the registration gate 35, and then conveyed to the paper inlet of the pressure developing device 20.

Therefore, the pressure developing device 20 includes the microcapsule paper 37.
The color developer paper 38 and the color developer paper 38 are supplied in a state where they are in close contact with each other and are integrated. The pressure developing device 20 is composed of a small diameter roller 21 and a backup roller 31. The microcapsule surface on which the latent image of the microcapsule paper 37 is formed and the color developer paper 3
The roller 8 is sandwiched between the small-diameter roller 21 and the backup roller 31 while being in contact with the developer-coated surface of 8 on the inside, and pressure is applied thereto. This pressure destroys the unexposed microcapsules and forms an image on the developer paper 38.

The microcapsule paper 37 and the color developer paper 38 that have come out of the pressure developing device are conveyed by a capsule paper feed roller 22, and the microcapsule paper 37 and the color developer paper 38 are separated by a peeling roller 23 in an upward direction and a color developer paper 38 in an orthogonal direction. After color development is promoted by the heat fixing device to form an image on the color developing paper 38, the paper is conveyed to the paper discharge tray 27 with the image side facing up. Heat fixing device 5
1 is a heating section 2 having a heater 30 and a blower fan 29 inside.
8 and a group of color developing paper feed rollers arranged before and after the roller.

The separated microcapsule paper passes through a meandering adjustment roller 24 and is wound around a winding shaft 25.

The operation of the device configured as described above will be explained below.

Now, after opening the document table cover 1 and placing the document on the document table glass 2, when the start button (not shown) is pressed, first, the developer paper discriminating section 5 fixed to the main body side of the copying machine 40 is pressed.
0, the type of color developing paper is determined, and the light intensity of the halogen lamp 3, the moving speed of the original platen glass 2, the pressing force of the pressure developing device 20, the heat fixing temperature, etc. are set as copying conditions suitable for it. Furthermore, in a configuration in which thermal fixing is performed using hot air, the air volume, air speed, etc. of the blower fan 29 are optimized. For example, OH
In the case of P colored color paper, the heat fixing temperature is increased compared to that of white color development paper, or the temperature of the heater 30 is increased, and the air volume and speed of the blower fan 29 are set to be increased to increase transparency. Also, if the color developing paper is thick, the pressure should be increased. Next, the original platen glass 2 moves to the right in FIG. 2 and stops at a position where the left end of the original platen glass 2 faces the light source. Thereafter, with the halogen lamp 3 turned on, the document table glass 2 is moved to the left.

The light emitted from the halogen lamp 3 is reflected by the original, and then passes through the filter 8, the lens 9, and the two reflecting mirrors 1.
After being reflected by the light beam 1, an image is formed on the microcapsule paper 37 located below the exposure table 19. At this time, the microphone capsule paper 37 is moved to the right one step above the exposure table at the same speed as the moving speed of the document table glass 2, so the image on the document is formed as a latent image on the microcapsule paper 37. be done.

As the platen glass 2 moves to the left, the half-moon roller 33 takes out the developer paper 38 from the developer paper cassette 32 and supplies it to the pressure developing device 20 in a state where it is overlapped with the exposed microcapsule paper 37. The latent image on the capsule paper 37 is developed and transferred onto the developer paper 38.

Thereafter, the developing paper 38 is thermally fixed by the thermal fixing device 51 and then discharged from the copying machine 40 .

The microphone capsule paper 37 that has passed through the pressure developing device 20 is sequentially wound around the winding shaft 25. When the document platen glass 2 finishes moving to a position where its right end faces the light source, copying of the document is completed and the halogen lamp 3 is turned off.

Further, the copying conditions may be set by the user using a panel switch (not shown) instead of using the developing paper discriminator 50.

In addition to image forming apparatuses that utilize reflected light from a document as described above, devices that form images by exposing a document and a light-sensitive pressure-sensitive medium in close contact with each other, and color documents such as those shown in Japanese Patent Application No. 113877-1982. Of course, it can also be applied to an apparatus that forms an image by contact exposure using a color separation mask original plate.

[Effects of the Invention] According to the present invention having the above configuration, the type of color developing paper is determined, copying conditions suitable for its characteristics are set, and heat fixing processing is performed, so that a good image can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing only the main parts of an image forming apparatus according to the present invention, and FIG. 2 is a schematic diagram of the image forming apparatus. In the figure, 1 is a manuscript cover, 2 is a manuscript glass, 20 is a pressure developing device, 28 is a heating section, 29 is a blower fan, 30 is a heater, 37 is a microcapsule paper, 38 is a color developer paper,
40 is a copying machine, 50 is a color developing paper discrimination section, and 51 is a heat fixing device.

Claims (1)

[Scope of Claims] 1. A photosensitive pressure-sensitive medium whose surface layer supports photocurable microcapsules containing a dye precursor and a photosensitive substance, and a color developer capable of causing a color reaction with the dye precursor. In an image forming apparatus that obtains an image on a color developing medium using a color developing medium having a material supported on its surface layer, means for determining the type of the color developing medium and copying conditions suitable for the type of the color developing medium. An image forming apparatus comprising means for setting. 2. The image forming apparatus according to claim 1, wherein when the color developing medium is an OHP, at least one of the heat fixing temperature and the wind speed and air volume of the heat fixing fan is increased.