JPH04120532A - image forming device - Google Patents

Abstract

PURPOSE:To bite in a developing medium without soiling a pressurizing roll and outputting image to the whole developer medium by irradiating a photosensitive/pressure sensitive recording medium through the developing medium with ultra violet rays. CONSTITUTION:The developing medium 28 and the photosensitive/pressure sensitive recording medium 12 are superposed before pressure developing is carried out. After that, the photosensitive/pressure sensitive recording medium 12 is irradiated with the ultra violet rays from the developing medium 28 side by an ultra violet rays exposure unit 40. Because of this, a part of the capsule where the developing paper 28 is not superposed is hardened by being irradiated with the ultra violet rays, and since the ultra violet rays are cut off by the developing medium 28 in a part of the capsule where the developing medium 28 is superposed, image information (latent image) of the document formed on the photosensitive/pressure sensitive recording medium 12 is protected. Thus, the part of the micro capsule where there is a possibility of being pressurized is completely hardened, and sticking of soil to the pressurizing roll is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an image forming apparatus using a photosensitive recording medium having sensitivity characteristics in the visible light region and the ultraviolet light region.

[Prior Art] For example, when a light-sensitive pressure-sensitive recording paper as shown in U.S. Pat. No. 4,399,205 is used, the light-sensitive pressure-sensitive recording paper is irradiated with visible light having image information from a light source. A latent image is formed on the photosensitive and pressure sensitive recording paper. At this time, cyan has sensitivity peaks in six visible light components: red, green, and blue.

Magenta, Yello
Each of the capsules (w) reacts in accordance with the respective exposure amount to form a latent image on the photosensitive and pressure sensitive recording paper. By superimposing color developer paper on this and applying pressure, an image is realized on the surface of the color developer paper. A specific example of this is already known from Japanese Patent Laid-Open No. 58-88740.

In addition, when attempting to manufacture an image forming apparatus using such photosensitive and pressure sensitive recording paper, if the photosensitive and pressure sensitive recording paper is wound into a roll and placed inside the image forming apparatus, the photosensitive and pressure sensitive recording paper Roll-shaped photosensitive and pressure-sensitive recording paper is used because it can reduce costs by eliminating the need for a paper feeding mechanism.

[Problems to be Solved by the Invention] However, in the image forming apparatus using the above-mentioned photosensitive and pressure-sensitive recording paper, when trying to output an image on the entire color developer paper, usually cut paper is used as the color developer paper. , it is necessary to bite the developer paper in a pressure developing device. However, the microcapsules of the photosensitive and pressure-sensitive recording paper that have separated from the developer paper are destroyed when pressure is started from the area where there is no developer paper in order to engulf the developer paper, as the microcapsules mentioned above are not completely cured. This has the disadvantage of staining the pressure roller.

The present invention has been made in order to solve the above-mentioned problems, and is to completely harden the microcapsules in the part of the photosensitive pressure sensitive recording medium that protrudes from the color developing medium and is likely to be pressurized. An object of the present invention is to provide an image forming apparatus in which dirt does not adhere to a pressure roller.

[Means for Solving the Problems] In order to achieve this object, the image forming apparatus of the present invention has the following features:
After the photosensitive pressure sensitive recording medium is irradiated with image information to form a latent image, and before the photosensitive pressure sensitive recording medium is overlapped with the color developing medium and pressurized by the pressure mechanism, the photosensitive pressure sensitive recording medium and the color developing medium are separated. An exposure device is provided that irradiates ultraviolet rays from the developing medium side toward the photosensitive pressure-sensitive recording medium in a superimposed state.

[Operation] In the device configured as described above, the color developing medium and the light-sensitive pressure-sensitive recording medium are combined before pressure development, and then,
When ultraviolet rays are irradiated from the developing medium side toward the photosensitive pressure-sensitive recording medium, the capsules in the area where the developing paper does not overlap will be
The capsule is cured by being irradiated with ultraviolet rays, but the image information (latent image) of the document formed on the photosensitive and pressure-sensitive recording medium is removed because the ultraviolet rays are cut by the developing medium in the capsule where the developing medium overlaps. ) are protected.

[Example] DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments embodying the present invention.

In the photosensitive and pressure sensitive copying machine 1 of this embodiment, as shown in FIG.
and color developer paper 28 (hereinafter referred to as recording paper) are used.

In addition, the microcapsule paper 12 used in this example
The surface of the support is coated with microcapsules, and the microcapsules contain a dye precursor that reacts with a color developer described below. A color developer is coated on the surface of the support of the color developer paper 28 and develops color by reacting with a dye precursor.
It is described in the specification of No. 09, etc., and will be omitted here.

Next, the configuration will be explained with reference to FIG.

At the top of the copying machine 1, there is a document table glass 2 and a document table cover 3.
A desired original 4 is placed on the original platen glass 2.
is placed face down and the document table cover 3 is closed.

A halogen lamp 5a and a reflector 5b are provided below the document table glass 2 in the upper part of the copying machine 1.

A light source unit 5 equipped with a reflecting mirror 8 and the like is mounted on the document table glass 2.
It is disposed so as to be able to reciprocate along a shaft 13 that is constructed parallel to the above. The light source section 5 irradiates light onto the document table glass 2 in a line in a direction perpendicular to the movement direction. The irradiated light passes through the transparent platen glass 2,
The original 4 placed on top of this reflects the light downward.

A mirror portion 9 including reflective mirrors 9a and 9b is disposed below the document table glass 2 and is movable separately from the light source section 5, and the light reflected from the document 4 is reflected by the reflective mirrors 8.
The light beams 9a and 9b are reflected in this order and guided in parallel to the moving direction of the light source section 5.

Below the document platen glass 2, a projection lens 7, which is usually fixed, and a filter 6 for adjusting the color tone of the copied image are provided.
is provided, and the light reflected by the reflecting mirror 9b enters the projection lens 7. The light projected by the lens 7 is reflected by the reflective mirror portions 10a and 10b.

An exposure table 11 for exposing the microcapsule paper 12 is arranged on the right side of the reflection mirror 10b, and a reflection mirror 10c for switching the optical path is arranged between the reflection mirror 10b and the exposure table 11. ing. Image information on the original 4 is formed on the microcapsule paper 12 arranged along the exposure table 11 .

In addition, although the reflecting mirrors 10a and 10b are normally fixed, they are set when enlarging or reducing the size of the latent image formed on the microcapsule paper 12, and the optical path length is changed to change the projection magnification m. The structure is such that they can be moved together in the axial direction of the shaft 13 in order to change the angle.

On the other hand, a cartridge 15 is disposed in the center of the copying machine 1, and the elongated microcapsule paper 12 is housed in the cartridge 15, which is removable from the machine while being wound around the cartridge shaft 14.

With the cartridge 15 set at a predetermined position within the machine, the leading end of the microcapsule paper 12 is pulled out toward the exposure table 11.

Below the exposure table 11 is a feed roller 19. A dancer roller 21 for tension adjustment is provided.

To the right of the dancer roller 21 is a large diameter roller 2?
A pressure developing device 2 including a and a backup roller 22b
2 is disposed, and on the right side of the pressure developing device 22, a separation roller 23 is disposed for separating the microcapsule paper 12 and the color developing paper 28 that are in close contact with each other, as will be described later. A winding shaft 24 for fitting and holding the microcapsule paper 12 is disposed between the cartridge 15 and the winding shaft 23 . On the left side of the pressure developing device 22 is an ultraviolet exposure unit 4 that irradiates ultraviolet rays from the developer paper 28 side toward the microcapsule paper 12 with the developer paper 28 and microcapsule paper 12 in close contact with each other.
0, and an ultraviolet lamp 42 that does not have wavelengths in the visible light range is built in the ultraviolet exposure unit 4o (see FIG. 2).

Microcapsule paper 1 coming out from the top of cartridge 15
2 is guided by a tension roller 19 and passes above the exposure table 11, and then passes through a dancer roller 211 and a pressure developing device 2.
2 and further guided to a separation roller 23, and then wound onto a winding shaft 24. Note that the unexposed microcapsule paper 12 after leaving the cartridge 15 is maintained in an unexposed state by the light shielding cover. A paper feed cassette 29 containing developer paper 28 is installed below the pressure developing device 22 . A suction cup-type paper feeding mechanism 30 that sucks paper using negative pressure suction is arranged above the paper feeding cassette 29, and the developing paper 28 is taken out one by one by the paper feeding mechanism 30. . Between the paper feeding mechanism 30 and the pressure developing device 22, a feeding guide 31d1 and feeding rollers 31a, 31b, 31 are provided.
c is arranged, and the developing paper 28 is fed by a feed roller 31a,
31b, 31c, and a feed guide 31d, and are carried into the pressure developing device 22.

A separation chute 27, which will be described later, is disposed on the right side of the pressure developing device 22, a heat fixing device 32 is disposed on the right side of the separation chute 27, and a heat fixing device 32 is disposed on the right side of the heat fixing device 32. A paper discharge tray 33 is provided for storing the color developing paper 28 on which an image has been formed.

Furthermore, this copying machine has an autoloading function for automatically setting the microcapsule paper 12 on a predetermined transport path within the apparatus.

This is a function that automatically pulls out the leader film portion attached to the tip of the microcapsule paper 12 into the apparatus, transports it within the apparatus, and winds it around the winding shaft 24. As a result, the microcapsule paper 12 following the leader film section 18 is also wound around the winding shaft 24.
Setting into the device is also completed.

For this automatic loading, a half-moon roller 17 is provided between the roller 19 and the cartridge 15 for pulling out the leader film portion, and a separation chute 27 is rotatably attached for guiding the leader film to the winding shaft 24. It is being Around the winding shaft 24, a machining guide 25 and a machining guide 26 are arranged for winding the leader film.

Note that the microcapsule paper 12 used in this example
is sensitive to visible light in the red, green, and blue wavelength ranges.
Each of these capsules has photosensitive characteristics not only in the visible light region described above, but also in the ultraviolet region. In addition, the developer paper 28 is
Constructed to prevent UV rays from passing through.

Next, the operation of this copying machine will be explained.

When the cartridge 15 is set in the copying machine 1, autoloading is started.

The half-moon roller 17 rotates once to several times in the conveyance direction only when autoloading starts, and the leader film section 18
is sent out to roller 20. Thereafter, it stops, and subsequent conveyance is performed by driving the rollers 20.

The Makitori guide sea urchin 25, the Makitorigashi toshita 26, and the separation chute 27 rotate to the position indicated by the - dotted chain line, and the leader film part 18 attached to the tip of the microcapsule paper 12 is wound around the winding shaft 24. When the automatic loading is completed, the machining guide urchin 25, the machining guide sitter 261 and the separation chute 27 return to the positions indicated by solid lines and copying is possible.

When the copy start key is operated, the reflection mirror 8
, the halogen lamp 5 has a moving speed (1/m) V when the transport speed of the microcapsule paper 12 is v7 and the projection magnification m is
and move the reflection mirror 9a.

9b moves at a moving speed (1/2 m)V.

The conveyance speed of the microcapsule paper 12 is Miller County 8.9a.
, 9b is synchronized as described above,
Latent images of predetermined lines of the original 4 are sequentially formed on the microcapsule paper 12 as it passes through the exposure table 1. Note that the predetermined speed ratio is predetermined based on the set value of the magnification.

The microcapsule paper 12 on which the latent image has been formed is transported,
The topmost color developing paper 28 of the paper feed cassette 29 is fed to the paper feed mechanism 30.
, conveyed by feed rollers 31a, 31b, 310, etc.

After that, the microcapsule surface of the microcapsule paper 12 on which the latent image was formed and the developer-coated surface of the color developer paper 28 are
They are inserted into the ultraviolet exposure unit as a single unit with the two parts tightly attached on the inside. At this time, since all three types of microcapsules coated on the microcapsule paper 12 have photosensitivity in the ultraviolet region, they are completely exposed. However, since the color developer paper 28 does not transmit ultraviolet light [2], the portion of the microcapsule paper 12 that the color developer paper 28 is in close contact with is not irradiated with ultraviolet light, and the microcapsules in this portion are not exposed. The latent image formed on 12 is not destroyed. In other words, the latent image in the part of the microcapsule paper 12 that is in close contact with the developer paper 28 is protected, and the latent image in the part that is separated from the developer paper 28 is destroyed, and the microcapsules are completely exposed to light and hardened. .

Thereafter, the microcapsule paper 12 and the color developer paper 28 are fed to the pressure developing device 22, and the large diameter roller 22a
and is bitten by the backup roller 22b and pressure is applied. At this time, first, pressure is applied to the part of the microcapsule paper 12 that has been removed from the color developer paper 28 that has been exposed and completely cured in the ultraviolet exposure unit 40, and then the color developer paper 28 is bitten. Due to this pressure, the latent image formed on the microcapsule paper 12 is transferred onto the developer paper 28.

The microcapsule paper 12 and the color developer paper 28 that have come out of the pressure developing device 22 are separated by a separation roller 23, and then the color development of the color developer paper 28 is promoted by the heat roller 32a of the heat fixing device 32 to form an image. , the paper is delivered to the paper ejection tray 33 by the paper ejection roller 32b. Note that the separated microcapsule paper 12 is wound up on a winding shaft 24 via a separation roller 23e.

[Effects of the Invention] As is clear from the detailed description above, according to the present invention,
Since ultraviolet rays are irradiated onto the photosensitive pressure-sensitive recording medium through the color developing medium, it is possible to completely cure the microcapsules in the areas where the color developing medium is not in close contact with the color developing medium. It is possible to print an image on the entire color developing medium.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a photosensitive pressure-sensitive copying machine embodying the present invention, and FIG. 2 is a diagram showing the vicinity of an ultraviolet exposure unit. In the figure, 22 is a pressure developing device, 12 is a photosensitive pressure sensitive recording medium, 28 is a color developer paper, and 40 is an ultraviolet exposure unit.

Claims (1)

[Claims] 1. In an image forming apparatus using a light-sensitive pressure-sensitive recording medium that has photosensitive characteristics in the visible light region and embodies an image by overlapping it with a color developing medium and applying pressure, image information is irradiated onto the light-sensitive pressure-sensitive recording medium. After forming a latent image with the photosensitive pressure-sensitive recording medium and forming the latent image, and before superposing the color developing medium and applying pressure with a pressure mechanism, with the photosensitive pressure sensitive recording medium and the color developing medium superimposed,
An image forming apparatus comprising an exposure device that irradiates ultraviolet light from a developing medium side toward a photosensitive pressure-sensitive recording medium.