JPS63158551A - Pressure carrying method - Google Patents

Abstract

PURPOSE:To prevent the generation of wrinkles at the time of carrying by pressure a sheet material such as a photosensitive material, an image receiving material, etc., by pressing the sheet material against one pressure roller over the width direction of the sheet material in the upstream from an inserting and holding part in the carrying direction of the sheet material, allowing the sheet material to adhere closely to the pressure roller and guiding it to the inserting and holding part. CONSTITUTION:A photosensitive material S and image receiving paper C are curved by a guide plate 183, and thereafter, the whole area in the width direction is pressed against a pressure nip roller 82 by a blade 184. The blade 184 has elasticity of nylon, etc. desirably, consists of a material whose friction coefficient is small, and fixed to a supporting plate 186 swingably around a supporting point 185. Also, the supporting plate 186 is energized by, for instance, a spring 187, by which the blade 184 generated pressing force. As for the center angle of a pressing part of the blade 184 and an inserting and holding part of pressure nip rollers 80, 82, it is sufficient that it is within a range of 10-50 deg., and 30+ or -5 deg. is preferable. Also, as for the pressing force by the blade 184, it is sufficient that it is <=500g/cm<2>, and 100-300g/cm<2> is preferable. In such a way, no wrinkle is generated at the time of pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for conveying sheet materials under pressure, and more particularly, the present invention relates to a method for conveying sheet materials under pressure. After imagewise exposure of the coated photosensitive material 11,
The present invention relates to a pressurized conveyance method for an image forming apparatus in which the photosensitive material and the image-receiving material are superimposed and an image obtained on the photosensitive material is transferred to the image-receiving material under pressure.

(Technical background of the invention and its problems) As an example of an image recording material using microcapsules encapsulating a photosensitive composition, for example, Japanese Patent Application Laid-Open No. 57-1798
A system is known in which a synthetic polymer resin wall capsule containing a vinyl compound, a photopolymerization initiator, and a colorant precursor is supported on a support L, as disclosed in Japanese Patent No. 36. The image recording method using this system is to imagewise harden the microcapsules by exposure to light, rupture the unhardened microcapsules by applying pressure, and obtain a color image from the released colorant precursor. The method is characterized in that high quality images can be obtained through simple dry processing. However, this system has the drawback of significantly lower photosensitivity than systems using silver halide.

A patent application filed by Betsuto Motoyama filed in 1986 to improve these shortcomings and provide a new recording material that has high photosensitivity and can produce high-quality images through simple dry processing.
It is disclosed in the specification of No. 117089. This recording material includes at least a photosensitive silver halide, a reducing agent, and
Coated with a polymerizable compound and a color image-forming substance,
At least the polymerizable compound and the color image forming material are comprised of a photosensitive composition encapsulated in the same microcapsule.

Regarding the image recording method of recording images using this photosensitive material, Japanese Patent Application No. 60-1212 filed by the present applicant
It is disclosed in the specification of No. 84. This image recording method is
First, a latent image is formed by imagewise exposure, and then development is performed by heating, and the polymerizable compound in the area where the latent image exists is polymerized to produce a high molecular compound, thereby hardening the microcapsules. Then, the image-receiving material having an image-receiving layer to which the color image-forming substance can be transferred is stacked and pressurized to rupture at least a portion of the microcapsules in the area where the latent image does not exist, and the color image-forming substance is transferred to the image-receiving material. to obtain an image on an image-receiving material.

Then, using the above-mentioned photosensitive material, this photosensitive material is subjected to imagewise exposure, heat development is performed, and then the image recording material is overlaid with an image-receiving material and pressed, and an image is obtained on the image-receiving material by transfer, which is automatically performed. The device is disclosed, for example, in Japanese Patent Application No. 51896/1989 filed by the present applicant.

In this type of apparatus, the photosensitive material i4 after heat development is superimposed on the image-receiving material, and a pressure transfer device, for example,
A high pressure of 0.00 kg/cd is applied to transfer the image on the photoreceptor material to the receiver material.

[Problem that the invention seeks to solve]

The overlaid photosensitive material and image-receiving material are, for example, sandwiched between a pair of pressure rollers and conveyed under pressure, but the pressure is so high that wrinkles occur in the photosensitive material or the image-receiving material during pressurized conveyance. There is a problem.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide a pressurized conveyance method that does not cause wrinkles when conveying sheet materials such as photosensitive materials and image-receiving materials under pressure.

[Means and operations for solving the problem] The above object of the present invention is to provide a method for conveying notebook material under pressure by sandwiching it between a pair of pressure rollers, in which a sheet material is conveyed upstream from the nipping part in the sheet material conveyance direction. This is achieved by a pressurized conveyance method characterized in that the sheet material is pressed against one pressure roller across the width direction, and the sheet material is brought into close contact with the pressure roller and guided to the nipping section.

In other words, before a pair of pressure rollers that rotate and sandwich the sheet material sandwich the sheet material, the sheet material is pressed against one of the pressure rollers and brought into close contact with the other pressure roller, so that the sheet material is integrated with the pressure roller. and is guided to the holding part. Therefore, since the sheet material is conveyed under pressure by the pressure roller without loosening, it is possible to prevent the occurrence of wrinkles during pressurization.

The sheet material in the present invention is, for example, a photosensitive material t4 for obtaining a visible image by transferring an image obtained by using an imagewise exposure point to an image receiving material f4 having an image receiving layer under pressure.

In this case, preliminary heat development or lW
It may also include a step of performing formal development.

An example of such a material is a type of material in which a polymerizable compound is imagewise cured by imagewise exposure, and then a visible image is obtained by applying pressure, as disclosed in Japanese Patent Application Laid-Open No. 57-1991 filed by the present applicant. The material disclosed in Japanese Patent No. 179836 is mentioned. This material has a synthetic polymer resin wall capsule containing a vinyl compound, a photopolymerization initiator, and a colorant precursor supported on a support.

In addition, the silver halide is contained and subjected to post-thermal development to give imagewise exposure to develop the silver halide, the polymerizable compound is simultaneously cured in correspondence with this development, and then pressure is applied to form a visible image. An example of the type of material that can be obtained is the material disclosed in Japanese Patent Application No. 121284/1984 filed by the present applicant. The material disclosed in Japanese Patent Application No. 60-121284 is one in which a color image-forming substance is transferred to an image-receiving material t-1 having an image-receiving layer after thermal development to obtain an image on the image-receiving material. , at least a photosensitive silver halide, a reducing agent, a polymerizable compound, and a color image-forming substance are coated on a support, and at least the polymerizable compound and the color image-forming substance are encapsulated in the same microcapsule. It is something that

Note that the image recording device equipped with a pressure transfer device for carrying out the method of the present invention is a heat developing device when using a type of photosensitive material that performs heat development before applying pressure to fix the image. When using a type that does not perform heat development, it means a type that does not have a heat development device.

[Embodiment]

Embodiments of the present invention will be described below, taking as an example the case where a type of photosensitive material that undergoes heat development before pressure transfer is used.

FIG. 1 is a sectional view of an image recording apparatus equipped with a pressure transfer device for carrying out the method of the present invention.

The image recording apparatus includes a document supporting glass plate 2 attached to the upper surface of a housing 1 so as to be slidable back and forth in the direction of the arrow. That is, the glass plate 2 is moved back and forth in the direction of the arrow with the document placed face down.

At the bottom of the glass plate 2, there is a reflector 6 for illuminating the original.
An additional illumination lamp 8 is provided, and a fiber lens array 10 for forming an original image on a photosensitive material S at a predetermined position is provided.

A photosensitive material cartridge I4 containing a photosensitive material roll 12 wound with a photosensitive material S is removably attached to the side of the housing 1. At the outlet 16 of the photosensitive material S of the photosensitive material cartridge 14, a pair of material feed-out rollers 21 and 22 housed in the magazine connection dark box 20 are arranged, whereby the photosensitive material S wound around the photosensitive material roll 12 is delivered to a predetermined position. It can sometimes be extended a certain length and then retracted as desired.

When the leading edge of the photosensitive material S advances, the photosensitive material feeding rollers 21 and 22 move away from each other as shown by imaginary lines to facilitate the advance of the photosensitive material S. A cutter unit 23 for cutting the photosensitive material S and a guide plate 24 are disposed in front of the magazine connection dark box 20 (hereinafter, the term "front" refers to the downstream side in the traveling direction of the photosensitive material, etc.).

In front of the guide plate 24, an exposed photosensitive material support roller 26 and two photosensitive material nip rollers 28, 30 pressed against the exposed photosensitive material support roller 26 are arranged. The photosensitive material S guided by the guide plate 24 is brought into close contact with the exposed photosensitive material support roller 26 by the photosensitive material nip rollers 28.30.
Fiber lens array 1 at position 32 between 30
0 provides imagewise exposure of the original.

In front of the exposed photosensitive material support roller 26, a heat developing device 40 that heats and develops the exposed photosensitive material S is arranged. The heat developing device 40 includes a developing housing 42 having a heat insulating effect, and is disposed within the developing housing 42, and has a diameter of about 120 mm.
An endless belt 50 is supported by a heating roller 44 that is heated to °C and four heald support rollers 46, 47, 48, and 49, and is wound around the outer circumference of an arc of about 270 °C of the heating roller 44, and the support roller 49. The nip roller 52 is pressed against the nip roller 52.

The heat developing device 40 further includes an exposed photosensitive material support roller 26.
A guide device 54 guides the photosensitive material S fed from above onto the heating roller 44 and separates the photosensitive material 4S from the heating roller 44 after being heated and developed; a vertical guide device 58 for guiding the optical material S to the outlet 56;
6 is provided with a sensitive material leading edge detection sensor 60.

Directly below the outlet 56, a pair of pressure rollers 62, 64,
A photosensitive material receiving paper stacking device comprising a nip roller 66 pressed against a pressure roller 64, and a guide member 68 that guides the photosensitive material S sent by the pressure roller 64 and the nip roller 66 to the contact portion of the pressure rollers 62 and 64. 70 are arranged.

An image-receiving paper supply device 72 is disposed on the side of the photosensitive image-receiving paper stacking device 70 . The image-receiving paper supply device 72 includes an image-receiving paper cartridge 7 that pivotally supports an image-receiving paper roll 71 on a support base.
3 is removably attached to the housing L. Installed receiver paper cartridge.

A pair of feed rollers 74 and 76, a cutter unit 77, and a guide plate 78 are arranged inside the shifter 3.

(Below the three-material image-receiving paper stacking device 70, there are a pair of pressure nip rollers 80, 82, and a pressure nip roller 80.
A transfer device 88 is provided which includes backup rollers 84 and 86 for making the pressure applied to the roller 82 uniform in the axial direction. Pressure nip roller 80.82 weighs approximately 500kg
They are pressed together by a pressure of /cd.

A photoreceptor paper peeling device 9o is provided below the transfer device 88. The sensitive material receiving paper peeling device 9o includes a guide member 92, a first feed roller 94, a second feed roller 96, and a first
A guide roller 98.1o is arranged so as to press only the photosensitive material S at both outer end portions on the feed roller 94.

It consists of a peeling belt 102 wrapped around.

? , 11 A sensitive material disposal section 104 is located on one side of the separation device 90.
is provided, and a fixing device 106 is provided on the other side. The sensitive material disposal section 104 includes a guide member 108 , a pair of feed rollers 110 and 112 , and a disposal box 114 .
The guide member 10 is sent from the edge separating device 90.
The photosensitive material S guided by 8 is sent to the feed roller 110.
2, it is thrown into the waste box 114.

The fixing device 106 includes a guide member 120 provided with an irradiation opening 121 and an ultraviolet irradiation lamp 12 with a reflection member 122.
4 and a pair of feed rollers 126 and 128, the image receiving paper C sent from the peeling M device 90 and guided by the guide member 120 is irradiated with ultraviolet light for about 5 seconds to perform fixing.

In front of the fixing device 106, an image-receiving paper ejecting member 107 is provided, which includes an additional ejecting tray 130 that receives the image-receiving paper C and protrudes from the housing 1.

The image recording device further includes a control device connected to the illumination lamp 8, the photosensitive material feeding roller 2L22, the cutter unit 23, the document support glass plate 2, the photosensitive material leading edge detection sensor 60, and the photosensitive material receiving paper stacking device 70! f (not shown)
is provided, and the following operations are performed. That is, in the operation preparation stage of the image recording apparatus, so-called copy preparation stage, the leading end of the photosensitive material S is placed in the magazine connection dark box 20.

Next, press the copy start button (not shown).
The photosensitive material feeding rollers 21 and 22 operate to feed the photosensitive material S, and just before the leading edge of the photosensitive material S reaches the position 32, the illumination lamp 8 is turned on to illuminate the document.

When the leading end reaches position 32, the document supporting glass plate 2 moves, and the photosensitive material S is fed accordingly, and the document image is projected onto the photosensitive material S for imagewise exposure. on the other hand,
When the photosensitive material S is fed by an amount equal to the length of the document in the moving direction, the cutter unit 23 is activated to cut the photosensitive material S. Thereafter, the photosensitive material feeding rollers 21 and 22 are rotated in a direction to retract the photosensitive material S so that the leading end of the photosensitive material S is within the magazine connection dark box 20.

The cut and imagewise exposed photosensitive material S is transferred to a heat developing device 4
0, is brought into pressure contact with a heating roller 44 by an endless belt 5o, heated at about 120° C., and developed. The passage of the leading edge of the developed photosensitive material S through the outlet 56 is detected by the sensitive material leading edge detection sensor 6o.

On the other hand, in the receiving paper supply device 72, the receiving paper C is fed out from the receiving paper cartridge 73 in synchronization with the pressing of the copy start button or the timing of exposure start, and is cut into a predetermined length by the cutter unit 77.
The image-receiving paper C is stopped after being fed to a position where its leading end is nipped by the pressure roller 64 and the nip roller 66.

In the photosensitive image-receiving paper stacking device 70, the small and medium-sized image-receiving paper C is located at the center of the wider photosensitive material S in the width direction, and the leading edge of the photosensitive material S is aligned with the leading edge of the image-receiving paper C. Alternatively, they are superimposed so that they are several millimeters ahead of each other, and sent to a transfer device 88 where they are pressed with a pressure of about 500 kg/ct and transferred onto image receiving paper.

The photosensitive material S after transfer is peeled off from the image receiving paper C by a peeling belt 102 in a peeling device 90 and sent to a photosensitive material disposal section 104.
sent to. On the other hand, the image receiving paper C is sent to the fixing device 106, where it is irradiated with ultraviolet light for about 5 seconds to be fixed.
Thereafter, it is sent to the take-out tray 130 by the feed rollers 126,']2B.

The image recording device described above cuts the photosensitive material S and the image receiving paper C into predetermined lengths and then stacks them together. The photosensitive material S and the image receiving paper C are conveyed in a web form to the stacking device 70 and stacked. The photosensitive material S and the image receiving paper C may be cut into a predetermined length at the same time in front of the device 7o. In addition, photosensitive material S
Either one of the image receiving paper C and the image receiving paper C may be conveyed in the form of a sheet.

FIG. 2 is an internal side view of the transfer device 88. The superimposed photosensitive material S and image receiving paper C are conveyed by a pair of conveying rollers 18.
1.182, and guided by a bent or curved guide plate 183 to the nip portion of the pressure nip rollers 80.82. Here, the photosensitive material S and the image-receiving paper C are not directly conveyed to the nipping portion of the pressure nip rollers 80 and 82, but are curved by the guide plate 183 and guided to the nipping portion along the circumferential surface of the pressure nip roller 82. Further, after the photosensitive material S and the image receiving paper C are curved by the guide plate 183, the entire width direction is pressed by the blade 184 by the nip roller 8.
It is pressed against 2. The blade 184 is preferably made of an elastic material such as nylon and has a small coefficient of friction, and is fixed to a support plate 186 that is swingable about a fulcrum 185. The support plate 186 is biased by, for example, a sub and ring 187, so that the blade 1
A pressing force is generated at 84. The central angle between the pressing part of the blade 184 and the nipping part of the pressure nip roller 80.82 may be in the range of 10 to 50 degrees, preferably 30 degrees.
5° is good, and the pressing force by the blade 184 is 500°.
g/aj or less, preferably 100~
300 g/d is good.

The photosensitive material S and the image-receiving paper C guided along the circumferential surface of the pressure nip roller 82 are pressed against the pressure nip roller 82 by the blade 184 and guided to the nipping section while being in close contact with the pressure nip roller 82. Wrinkles do not occur when pressurized.

Note that the spring 187 is not limited to the coil spring shown in the drawings, but may use other urging means to generate the pressing force.Furthermore, the blade 184 may be formed of an elastic material,
By fixing the blade 184 in a cantilevered manner without using the blade 87, a predetermined pressing force can be generated only by the elastic force of the blade 187. Further, the blade 184 is not limited to nylon, and may be formed of other plastic resin or metal as long as the coefficient of friction is small.

Further, the blade 184 may be in contact with either side of the photosensitive material S or the image receiving paper C.

Further, in this embodiment, since the carrying-in direction and the carrying-out direction of the photosensitive material S and the image-receiving paper C are parallel to each other, the photosensitive material 148 and the image-receiving paper C are curved by the bent or curved guide plate 183 and placed on the pressure nip roller 82. Although it is guided, photosensitive material S
By carrying in the image-receiving paper C substantially parallel to the blade 184, the photosensitive material S and the image-receiving paper C can be guided to the pressure nip roller 82 without being curved.

Although the embodiment described above is a transfer device that transfers an image on a photosensitive and pressure-sensitive thermal development material to an image receiving paper under pressure, the present invention can be applied to any device that conveys a sheet material under pressure. For example, the present invention can also be applied to a pressure fixing device of an electrophotographic device.

C Effects of the Invention] According to the present invention, the sheet material conveyed between a pair of pressure rollers that are in pressure contact with each other is pressed against one of the pressure rollers across the width direction, and brought into close contact with the circumferential surface of the pressure roller. Since the sheet material is guided to the nipping part by the pressure roller, the sheet material is pressed at the nipping part while being integrated with one of the pressure rollers without loosening, and wrinkles in the sheet material can be reliably prevented during pressurized conveyance. .

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an image recording apparatus having a pressure transfer device according to an embodiment of the present invention, and FIG. 2 is a side view of the pressure transfer device according to an embodiment of the present invention. Symbols in the figure: S...Photosensitive material C...Receiver paper l...Housing 2...Glass plate 6...Reflector 8...Illumination lamp 10...Fiber lens array 12... Sensitive material roll 14...Sensitive material cartridge 16...Outlet 20...Magazine connection dark box 21.
22...Sensitive material feeding roller 23...Cutter unit 24...Guide plate 26
...Exposure window material support roller 28.30...Sensitive material nip roller 32...Exposure position 40...Heat developing device 42...Developing housing 4
4... Heating roller 46.47.48.49... Heald support roller 50.
...Endless belt 52...Nip roller 54...Guide device 56...Outlet 58...Vertical guide device 60...Unfinished material tip detection sensor 62.64...Pressure port'y 66... Nip roller 68...Guide member 70...Sensitive material image-receiving paper stacking device 71...Receiving paper roll 72...Receiving paper supply device 7
3... Receiving paper cartridge 74, 76... Feeding roller 77... Counter unit 78... Guide plate 80
．． 82... Pressure nip roller 84. 86... Backup roller 88... Transfer device 90... Sensitive material receiving paper peeling device 9
2... Guide member 94... First feed roller 96.
...Second feed roller 98.100...Guide roller 1
02... Peeling heat 104... Sensitive material disposal section 106.
...Fixing device 107...Receiving paper take-out section 108.
...Guide member 110.112...Feed roller 11
4... Waste box 120... Guide member 121
...Opening 122...Reflecting member 124...Lamp 126.128...Feeding roller 130...Ejecting tray 181.182...Conveyance roller 183...Guide plate 184...Blade 185.・Fulcrum 186・
...Support plate 187...Spring

Claims (1)

[Claims] In a method of conveying a sheet material under pressure by sandwiching it between a pair of pressure rollers, upstream from the nipping part in the sheet material conveyance direction,
Press the sheet material across the width against one pressure roller,
A pressurized conveyance method characterized in that the sheet material is brought into close contact with a pressure roller and guided to a nipping section.