JPH0216549A - image forming device - Google Patents

Abstract

PURPOSE:To use the device in high-humidity environment without any trouble by feeding a current to a 1st recording medium and heating it, and thus lowering the humidity of the recording medium itself. CONSTITUTION:A conductive member is fitted on the reverse surface of the 1st recording medium 74 or the support member for the 1st recording medium 74 is made of the conductive material; and electrodes 300a and 300b are arranged where the conductive member abuts on the passage for the 1st recording medium 74. Therefore, the conductive member on the reverse surface of the recording medium 74 abuts on the electrodes 300a and 300b provided on the passage for the medium to supply a current and then heat is generated to dry the 1st recording medium 74. Consequently, the 1st recording medium itself is dried and the device is usable even in high-temperature, high-humidity environment without any trouble.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an image forming apparatus that forms an image on an m-recording medium.

[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 over the formed latent image and pressure is applied, and then the developer paper is heated to form a 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.

[Problems to be Solved by the Invention] However, when pressure fixing is performed in a state where the outside air is hot and humid, the binder carried on the photosensitive pressure-sensitive sheet and the binder carried on the color developing paper fuse together, The photosensitive pressure sensitive sheet and the color developing paper are in an adhesive state. If the adhesive in this state is forcibly removed, the components supported on the photosensitive pressure sensitive sheet will be peeled off from the sheet and adhered to the developing paper, making it impossible to obtain a good developed image.

Similarly, when heat fixing is performed in a hot and humid environment, there is a problem in that the developer paper sticks to the surface of the heat roller.

The present invention has been made to solve the above problems,
It is an object of the present invention to provide an image forming apparatus that can be used without problems in a high humidity environment by lowering the humidity of the recording medium itself by passing a current through and heating the first recording medium.

[Means for Solving the Problems] A first recording medium that carries a first component on its surface and is capable of forming a latent image; a second component that reacts with the first component is carried on its surface; When the first component and the second component react, the second recording medium on which the latent image is visualized;
An image forming apparatus comprising: a latent image forming means for forming a latent image on a recording medium; and a developing means for developing the latent image by bringing the first recording medium and the second recording medium in close contact with each other. , a conductive member is attached to the back surface of the first recording medium, or a supporting member of the first recording medium is made of a conductive material, and the conductive member in the path of the first recording medium abuts. Electrodes were placed in the area.

[Function] In the present invention having the above configuration, the conductive member on the back surface of the first recording medium and the electrode provided in the path of the medium come into contact and a current flows, generating heat. The recording medium dries.

[Example] Hereinafter, an example embodying the present invention will be described with reference to the drawings. In the following embodiments, an embodiment will be described in which a photosensitive and pressure-sensitive paper capable of color printing, which is proposed in US Pat. No. 4,399,209, is used as the photosensitive paper. When using other photosensitive paper, it is necessary to make some changes to the fixing system, but the exposure system can be used as is.

This light-sensitive pressure-sensitive paper is a microcapsule paper whose mechanical strength changes when exposed to light, and which carries microcapsules containing a dye precursor (first component) on its surface. recording medium) and a color developer (second component) that reacts with the dye precursor inside the destroyed microcapsules.
and a color developer paper (second recording medium) that carries .

FIG. 1 shows the internal structure of a recording device according to the present invention. This device includes an exposure light source section A, an exposure section B1 a pressure development section C1 a heat fixing section D1, a storage cartridge section E for photosensitive and pressure sensitive recording sheets.
1. It is generally composed of a color developing paper insertion section F and a drive section G.

The main body 1 of the apparatus has a front cover 4 and a rear cover 5 provided on the upper edge of a housing 2 so as to be openable and closable, and an upper cover 6 is detachably attached to the front cover 4.

The exposure light source section A includes a halogen lamp 9 that is an exposure light source located near one side of the housing 2, and a reflector 1 on the back side.
It is placed horizontally surrounded by 0. A filter box 11 is provided in front of the halogen lamp 9, and a light diffusing plate 14 having a curved surface shape is further provided in front of the filter box 11.
is placed.

The filter box 11 is configured such that a filter case 12 for a color filter 169 device can be inserted therein. A shirt cover plate 1 is provided on the front of the filter box 11.
5 is provided so that it can be opened and closed (rotated) freely. When the filter case 12 is not set in the filter box 11, the shirt cover plate 15 stands up, and the front surface of the filter box 11 is closed.

Next, to explain the configuration of the exposure section B, the light diffusing plate 14
A transparent support 29 is disposed above. A pressure plate 31 formed of a mounting board 33 and a rubber pressure plate 34 affixed to the lower surface of the mounting board 33 is disposed above the transparent support 29 with a slight interval therebetween. A frame 35 is disposed above the pressing plate 31, and a rotation operating shaft 36, 36 is attached to the lower surface of the frame 35. The mooring pins 38 and 38 disposed at the tips of the swinging rods 37, 37 provided at the ends of the shaft 36 are attached to the mounting base plate 33.
The frame frame 35 suspends the press plate 31 by being moored to a hook 32 provided on the upper surface of the frame 35 . A light-transmissive document table (not shown) is inserted between the transparent support body 29 and the pressing plate 31 through document table insertion openings (not shown) provided on both sides of the main body 1. It has become.

Therefore, a document table insertion guide frame 54 is provided between the transparent support body 29 and the pressing plate 31. Further, a photosensitive and pressure sensitive recording sheet 74 is arranged so as to be conveyable between the document table and the pressing plate 31.

It should be noted that an exposure slit tube 47 for re-exposure of the surface of the photosensitive pressure sensitive recording sheet is arranged to the left of the suppression plate 31 on the exit side of the exposure section B. Further, a sheet guiding guide plate 51 disposed on the exit side of the exposure table B is used when a roll paper-like photosensitive and pressure sensitive recording sheet is inserted into the apparatus main body 1. It is formed in an arc shape so that it is automatically guided toward part C.

Next, the pressure developing section C will be explained. The pressure developing section C
A pair of pressure developing rollers 60 and 61 are arranged facing each other so as to be able to approach each other apart from each other. and one pressure developing roller 61
is pressed to the stopper 62 position via a load spring 63, and the other pressure developing roller 60 is pressed against the backup roller 6.
4. The roller is urged toward the pressure developing roller 60 via an opening/closing roller 65 and an opening/closing cam roller 66.

Next, to explain the structure of the heat fixing section, the heat fixing section disposed above the pressure developing section C includes a pair of heat fixing rollers 68 and 69 and a sheet of the heat fixing rollers 68 and 69. It is also constituted by a pair of delivery rollers 70, 71 arranged at the delivery side positions. In this case, one of the heat fixing rollers 68 has a built-in heater 72 for heating the roller, and a thermistor (not shown) is attached to the surface of the roller, and the temperature of the heater 72 is determined by a temperature measurement signal from the thermistor. It is now under control.

Next, the configuration of the photosensitive and pressure sensitive recording sheet storage cartridge section E will be explained. The cartridge section E disposed on the frame frame 35 includes a photosensitive and pressure sensitive recording sheet storage cassette 7.
5 is installed. In the cassette 75, an uncoiler 76 for a rolled photosensitive and pressure sensitive recording sheet 74 is disposed, and a coil rough 7 is disposed to the left of the uncoiler 76. To explain the conveyance path of the sheet, the photosensitive pressure sensitive recording sheet 74 unwound and pulled out from the uncoiler 76 passes between the guide roller 39a10 and the drawer roller 408 described above, and passes between the press plate 31 which is the exposure section B and the document table. , and then passed between the guide roller 39b10 and the drawer roller 40b and sent between the pressure developing rollers 60 and 61,
Furthermore, the photosensitive and pressure sensitive recording sheet is wound up by the recoiler 77 via a feeding roller 78. This feed roller 78 regulates the amount of feed of the photosensitive and pressure sensitive recording paper sheet. Further, an electrode 300a is disposed on the cartridge side of the guide roller 39a, and another electrode 300b is disposed on the pressure developing section side of the guide roller 39b.

Next, the configuration of the color developer paper insertion section F will be described. A sheet guiding guide plate 80 is provided that extends into the device body 1 from the color developer paper insertion lower 9 provided on the left side of the device body 1. A stopper 82 is provided at the back of the sheet guide plate 80 to temporarily stop the leading end of the color developing paper, and the end thereof is curved toward the entrance side of the pressure developing rollers 60 and 61. ing. A recessed hole 83 is provided in the middle of the sheet guiding guide plate 80, and a developer paper feed roller 84 can move freely into and out of the recessed hole 83, and can come into contact with a pinch roller 85 disposed above it. will be installed on the That is, the feed roller 84 is connected to the pressure spring 86.
The support tube 87 is pivoted at the tip of the support tube 87 which is rotationally biased by a release arm 89, and is pressed and biased toward the pinch roller 85.
is inserted.

FIG. 2 shows a photosensitive and pressure sensitive recording sheet 74 according to the first embodiment of the present invention.
An enlarged partial cross-section is shown. A conductive layer 303 is disposed on the surface of the paper support 302, and microcapsules 3 are further disposed thereon.
01 are stacked. The microcapsule 301 consists of an outer shell 304 and a liquid component 305 inside thereof. The liquid component 305 contains a dye precursor that develops color by reacting with a color developer (not shown) and a photocurable substance that cures in response to visible light.

As the conductive layer 303, since the microcapsules are of a type that hardens in response to visible light, a material that absorbs visible light over all wavelengths and is conductive is used. Carbon black is an example of such a material. The conductive layer 30 is formed by dissolving or dispersing such a material in a binder that attaches the microcapsules 301 to the support 302 and applying it to the back surface of the support 302.
3 is formed.

Next, the operation of this embodiment will be explained. First, when the power is turned on, when the heater 72 reaches a certain temperature (not shown)
, the ready lamp lights up. Although it may be done before the ready lamp lights up, the document 56 is set on the document table and inserted into the main body, and the color filter is set in the filter case 12 and inserted into the filter box 11. The shirt shirt plate 15 rotates in the direction of arrow a in FIG. 1, and the front surface of the filter box 11 is opened. Then, the pressing plate 31 is lowered, and the photosensitive and pressure sensitive recording sheet 74 is brought into close contact with the surface of the document. In this state, the electrodes 300a and 300b are in contact with the conductive layer 303 on the back side of the photosensitive pressure-sensitive recording sheet 74, and a voltage is applied between both electrodes to heat the unexposed photosensitive pressure-sensitive recording sheet 74 on the exposed surface. . When a current flows through the halogen lamp 9, the light from the halogen lamp 9 passes through the color filter 169, is diffused by the light diffusion plate 14, and is irradiated onto the original through the transparent support 29. The light that has passed through the original illuminates the surface of the photosensitive and pressure sensitive recording sheet 74. After exposure, the developer paper is inserted along the sheet guide plate 80 until it stops at the stopper 82. After the color developer paper is inserted, the color developer paper is sent between the pressure developing rollers 60 and 61 by transmitting the motor driving force to the feed roller 84. At this time, the photosensitive pressure sensitive recording sheet 74 is also fed by the photosensitive pressure sensitive sheet feeding roller 78 and wound up by the recoiler 77 at a synchronized speed. While the load is applied to the photosensitive and pressure sensitive recording sheet 74, the developer paper is transferred to the photosensitive and pressure sensitive recording sheet 7.
The pressure developing roller 60 is superimposed on the exposed surface of No. 4.
, 61. Therefore, the photosensitive pressure sensitive recording sheet 74
The uncured microcapsules on the exposed surface of the paper are crushed, and an image is realized on the surface of the color-developing paper through a color reaction between the dye precursor in the capsules and the developer on the surface of the color-developing paper. After the pressure development is completed, the developer paper is sent between heat fixing rollers 68 and 69.

On the other hand, the photosensitive pressure sensitive recording sheet 74 that has been subjected to pressure development is sent out by a photosensitive pressure sensitive sheet feeding roller 78 and wound up by a recoiler 77.

On the other hand, the color developing paper in the heat fixing section is heated between heat fixing rollers 68 and 69 to develop color. And the feed roller 70.7
1, the temperature is lowered, and the paper is discharged from the outlet 164 in a state where curling is prevented.

Next, FIG. 3 shows a photosensitive and pressure sensitive recording sheet 306 of the second embodiment.
shows. The photosensitive and pressure sensitive recording sheet 306 of this embodiment has the same microcapsules 308 as the microcapsules 301 of the first embodiment laminated on the surface of a support 307, but the difference from the first embodiment is that the support 307 does not have a structure in which the conductive layer 303 is applied to the back surface, but the support body 307 itself is formed of a material to which a conductive material is added. Since this embodiment is configured in this way, it is possible to obtain the same effects as in the first embodiment.

Note that the present invention is not limited to the above-mentioned embodiments,
Various modifications are possible. For example, the electrodes may be provided on both sides of the pressure developing roller 61.

[Effects of the Invention] As detailed above, in the image forming apparatus of the present invention, the first
By drying the recording medium itself, it can be used without problems even in high temperature and humidity.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an embodiment embodying the present invention, and FIG. 2 is a cross-sectional view of a photosensitive recording medium used in the embodiment.
FIG. 3 is a diagram corresponding to FIG. 2 of another embodiment. In the figure, 9 is a light source (latent image forming means), 60.61 is a pressure developing roller (developing device), 74 is a light-sensitive pressure-sensitive recording sheet (first recording member), 84.85 is a feed roller, 30
0a and 300b are electrodes, and 303 is a conductive layer.

Claims (1)

[Claims] 1. A first component that supports a first component on its surface and is capable of forming a latent image.
a recording medium, a second component that reacts with the first component is supported on the surface, and when the first component and the second component react, a second component on which the latent image is visualized; A recording medium, a latent image forming means for forming a latent image on the first recording medium, and a developing means for developing the first recording medium and the second recording medium on which the latent image is formed by bringing them into close contact with each other. In the image forming apparatus, a conductive member is attached to the back surface of the first recording medium, or a supporting member of the first recording medium is made of a conductive material, and in the path of the first recording medium. An image forming apparatus characterized in that an electrode is disposed in a portion where the conductive member contacts.