JPS63159852A - Peeling and separating device for heat developing transfer sheet - Google Patents

Abstract

PURPOSE:To exactly peel off photosensitive and image receiving sheets by holding the center projecting part of one sheet by a first separating means and moving it in the direction separated from the other sheet, and moving the other sheet in the opposite direction by a second separating means. CONSTITUTION:A photosensitive sheet 1 and an image receiving sheet 2 which have ended a heat developing transfer pass through between holding rollers 3, 4, and the center projecting part 1A of the photosensitive sheet 1 is bitten by carrying rollers 5A, 5B. Both side tip parts of the image receiving sheet 2 reach the lower part of separators 6A, 6B, the sheets 1, 2 stop temporarily, and thereafter, the rollers 5A, 5B insert and hold the projecting part 1A and ascend, and the separators 6A, 6B descend and depress the tip part of the sheet 2. In such a way, the separation of the sheets 1, 2 is started, the sheets 1, 2 are carried, and also, separated continuously, and both sheets 1, 2 are peeled off exactly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for peeling and separating stacked thermal development transfer sheets from each other.

[Conventional technology]

Diffusion transfer type thermal development, in which a color image is obtained by separating a silver image and a dye by releasing a diffusible dye through heat development and transferring this dye to an image-receiving element, requires a photosensitive element, an image-receiving element, a There have already been many technical disclosures regarding developing methods and devices, and a typical example is a method in which the surface of the dye fixing layer and the surface of the photosensitive layer are brought together between a pair of rollers that can uniformly heat and apply pressure. This is carried out by passing an image receiving element and a heat-developable photosensitive element overlapping each other.

Next, both overlapping elements are uniformly heated and thermally developed, and the dye released from the heat-developable photosensitive element is transferred to the dye-fixing layer by the heat development, and then the two sheets are peeled off to form an image-receiving layer. can be formed on the element.

In this way, when the heat development transfer sheets in the superposed state are finally peeled and separated, it is quite difficult to separate them because the adhesion between the two sheets is quite large. Therefore, JP-A-61-1
8951, as an automatic peeling device, as shown in FIG. When it reaches the top of the peeling roller 80, the peeling roller 80 is flipped up and the photosensitive sheet) N
is peeled off from the image receiving sheet P. At this time, the image receiving sheet P
Regarding, in order to counteract the peeling force of the photosensitive sheet N,
A pair of sandwiching rolls 81 .
It is designed to be clamped and supported by 82.

[Problem that the invention seeks to solve]

Although the preceding device described in the above publication is superior in that it enables automatic peeling compared to manual peeling, it is necessary to support the image-receiving sheet P when flipping up the peeling roller 80. Therefore, clamping rolls are required.

Since the exit position of this nipping roll is the starting point for peeling off both sheets P and N, the image receiving sheet P is separated from the photosensitive sheet N.
It is necessary to make it wider and to constantly hold the extra parts on both sides during transportation.

In this case, the image receiving sheet is made extra wide just for peeling, which increases the cost of the sheet material and is not economical.

Therefore, the main object of the present invention is to provide a peeling and separating device for thermal development transfer sheets that can reliably peel and separate photosensitive/image-receiving sheets, and that can effectively utilize the entire sheet for thermal development transfer processing, thereby reducing sheet material costs. It is about providing.

[Means for solving problems]

The above purpose is to make the leading edge of the central part of one of the photosensitive sheet and the image receiving sheet protrude forward from the leading edge of the side parts, and also to cause the leading edge of the central part of the one sheet to protrude forward from the leading edge of the central part of the other sheet. An apparatus for peeling and separating the stacked sheets after thermal development transfer is performed by stacking the sheets in a position in which the sheets protrude from each other and the leading edge of the side part is set back from the leading edge of the side part of the other sheet; a first separating means for grasping the central protrusion of the other sheet and moving it in a direction away from the other sheet; This is achieved by providing second separating means for relatively guiding the sheets in relation to each other on the exit side of the member that presses the non-mating surfaces of both sheets.

[For production]

In the present invention, when the first separation means grasps the central protrusion of one sheet and moves it in a direction away from the other sheet, the second separation means moves the other sheet in a direction away from the other sheet. , so both sheets separate. In this case, the starting point for separating the other sheet is the position of the holding member provided upstream of the second separating means, so the holding member supports the other sheet, and the second separating means holds the other sheet on one side. It is sufficient to have the function of guiding the sheet in the direction of separation from the sheet, and therefore, even if both sheets have the same width, separation is possible. This effect will be explained in more detail in Examples below.

〔Example〕

The present invention will be explained in more detail below based on examples.

The present invention relates to an apparatus for separating a stacked sheet in which a photosensitive element and an image receiving element are superimposed and thermal development transfer is performed by applying heat to at least one of the elements.

In this case, as shown in FIG. 1A, the photosensitive sheet (element)
1 and the image receiving sheet (element) 2 have the same width, and the shape of the photosensitive sheet 1 is such that the center tip 1a of the photosensitive sheet 1 protrudes more forward than the side tip 1b to form a central protrusion IA. put. Also, both seats 1 and 2
When stacking, the center tip 1a of the photosensitive sheet 1 is placed in a position where it protrudes forward from the (center) tip 2a of the image-receiving sheet 2, and the side tip 1b is set back from the (side) tip 2a. .

On the other hand, as shown in FIGS. 2 to 4, the overlapping sheets discharged from the thermal development transfer process are conveyed and held between pressing rollers 3 and 4, which function as pressing members, so that both sheets 1.degree. 2 are sandwiched. Conveying rollers 5A and 5B as first separating means are arranged on the exit side, and wedge-shaped separators 6A and 6 as second separating means are disposed on both sides of both sheets 1 and 20.
Place B. The conveyance rollers 5A, 5B and the separators 6A, 6B are movable upward and downward from the conveyance line of the sea 1-1.2, as indicated by white arrows in FIG.

Under this configuration, both sheets 1 and 2 are separated in the order shown in FIGS. 2 to 4.

That is, as shown in FIG. 2, both sheets 1 which have been thermally developed and transferred
．． 2 passes through the presser roller 3.4, the central protrusion IA of the photosensitive sheet 1 is caught between the conveyance rollers 5A and 5B, and the leading ends of both sides of the image receiving sheet 2 reach below the separators 6A and 6B, and preferably the sheet ) 1.2 is temporarily stopped, then
As shown in FIG.
The separators 6A and 6B are lowered and push down the leading ends of the image receiving sheet 2 on both sides. As a result, the photosensitive sheet 1 and the image-receiving sheet 2 begin to be separated from each other at the exit of the photosensitive sheet 1 and the image-receiving sheet 2, using the press rollers 3 and 4 as press members that resist the peeling force, and thereafter, as shown in FIG.
Separation continues with the conveyance speed increased.

Incidentally, in the above example, the wedge-shaped separators 6A and 6B are used as the second separation means, but other plate-like members, small rollers, etc. may be used. It may be a pair of conveying rollers that sandwich the front and back surfaces of the leading ends of the image receiving sheet 2 on both sides.

Moreover, other suitable chuck means may be used instead of the conveyance rollers 5A and 5B. Furthermore, both the first separating means and the second separating means may have only a guiding function, such as a wedge-shaped separator, but in this case, at least one of the two means has at least one sheet. In order to increase the peeling force, it is desirable to attach, for example, a pair of conveying rollers on the downstream side of the separator, which feed the separator forward while pinching the tip of the separator.

Incidentally, in the above example, the photosensitive sheet and the image-receiving sheet may be reversed, but if the central protrusion is provided on the image-receiving sheet side, it is disadvantageous in terms of the aesthetic appearance of the finished product. In this case, by making perforations along the side tips or the like, the unnecessary central protruding portion can be cut off after peeling. Further, although the center tip corresponding to the central protrusion IA of the image receiving sheet 2 in the above example may be located behind the center tip 1a, it is not necessarily on the same line as the side tips of the image receiving sheet 2. There's no need. The photosensitive sheet and the image-receiving sheet may be continuous sheets or short individual sheets. In any case, it is necessary for the separation device to operate at an appropriate timing based on the position of the leading edge of the stacked sheets, so an optical sensor, microswitch, etc. is installed to detect the leading edge of the stacked sheets. It is better to keep it. Moreover, since at least one of the first separating means and the second separating means only needs to move the leading edge of the corresponding sheet in the direction of separation, the separators 6A and 6B in the above example may be fixed in position. good. Also, depending on the slight misalignment between both sheets,
Unnecessary linear transfer may occur near the edges of the finished image due to transfer of the edges of the photosensitive sheet. In order to prevent this, the width of the photosensitive sheet can be set wider than the width of the image receiving sheet within the necessary minimum range.

The photosensitive element in the present invention can be obtained by coating and drying a material containing a dye-providing polymer, silver halide, and an organic silver salt on a support using a hydrophilic binder as a binder.

The image-receiving element also includes an image-receiving layer containing a polymer for fixing the heat-transferable dye that diffuses and migrates from the heat-developable photosensitive element. You can get it by cloth.

As a method for thermal development transfer and peeling and separation of both elements, when both elements are continuous sheets, for example, the method shown in FIG. 5 can be adopted. In the example shown in FIG. 5, the photosensitive element and the image receiving element are opposite to those in the above example.

To explain this, the roll-shaped heat-developable photosensitive element 10 is
Guided by the guide roller 11, it reaches the exposure position and C
Image exposure is performed by TR12. On the other hand, the image receiving element 13 is preheated by a flat heater 14A at a stage before being superimposed on the exposed photosensitive element 10 from the surface opposite to the superimposed surface of the image receiving element 13. Preferably, the photosensitive element 10 is also preheated by the flat heater 14B before it is overlapped with the image receiving element 13.

The photosensitive element 10 and image receiving element 13 that have been preheated are
The sheets are overlapped by a pair of heating rollers 15 and 16 and brought into close contact with each other by heating and pressure, and as the heating rollers 15 and 16 rotate, they are guided by guide plates 17 and 17 and supplied to the thermal development transfer section.

The thermal development transfer section includes, for example, a pair of upper and lower belt conveyors 1.
8.19 and both elements 10. from the back of one belt.
The heat block 20 may be configured to provide heat to the heat block 13.

On the outlet side of this heat-development transfer section, the peeling and separating device of the above example is provided, and after separation, the photosensitive element 10 is wound up on a take-up roll 21, and the image receiving element 13 is moved between the conveying rollers 5A, 5B and 22. 23 to a cutting position, where it is cut into a predetermined length by a cutter 24 and accumulated in a sheet shape in a storage section 25.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to reliably separate stacked sheets, and even if the widths of both sheets are the same, the entire width of the sheet can be used for thermal development transfer, and the previous device Material costs can be reduced compared to the conventional case.

[Brief explanation of the drawing]

Figures 1A and 1B are perspective views of the shape and overlapping state of photosensitive/image-receiving sheets according to the present invention, Figures 2 to 4 are front views sequentially showing the separation process, and Figure 5 is a thermal developing device. FIGS. 6(a) and 6(b) are perspective views of an example of a conventional device. l...Photosensitive sheet (element), 2...Image receiving sheet (element), IA...Central protrusion, 3, 4...Press roller (member), 5A, 5B...Transport roller (first 1 separation means), 6A, 6B... separator (second separation means), 1
0...Photosensitive element, 13...Image receiving element. Patent applicant: Konishiroku Photo Industry Co., Ltd. Agent: Yoshihisa Nagai, Figure 1A

Claims (1)

[Claims] (1) Among a photosensitive sheet and an image-receiving sheet, the leading edge of the central part of one of the sheets protrudes forward from the leading edge of the side parts, and the leading edge of the central part of one of the sheets projects forward from the leading edge of the central part of the other sheet. , and an apparatus for peeling and separating the stacked sheets after thermal development transfer is performed by stacking the sheets in a position where the leading edge of the side part is set back from the leading edge of the side part of the other sheet; a first separating means for grasping the protrusion and moving it in a direction away from the other sheet; and a first separation means for grasping the side tip of the other sheet and moving it in a direction away from the other sheet; A peeling and separating device for thermal development transfer sheets, characterized in that second separating means for relatively guiding the sheets in relation to each other are provided on the exit side of a pressing member that presses the non-matching surfaces of both sheets.