JPS61273988A - Copy sheet - Google Patents

Abstract

PURPOSE:To attain to enhance the efficiency of copy work, by bonding an ink sheet, wherein an ink layer is formed to a support, and a transfer sheet in such a state that the ink layer is closely adhered to the transfer sheet. CONSTITUTION:An ink layer 41b is formed to the single surface of a film 41a being an ink sheet support to constitute an ink sheet 41 and a transfer sheet 42 such as a plastic film or paper is closely adhered to the side of the ink layer 41b to constitute a copy sheet 43. In performing duplication, a manuscript is superposed to the copy sheet 43' and closely adhered thereto by closing a press plate 29 and, after transfer printing was performed by a flash lamp 31, the manuscript is removed. Then, a recovery roll 27 is driven to release the transfer sheet from the ink sheet in a release part 33 to take up the same. The released transfer sheet is superposed to a re-transfer sheet 18 and subsequently melted and transferred by the heat from a heating roll 19.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to copy sheets used in thermal transfer copying.

BACKGROUND TECHNOLOGY Conventionally, when copying an original using the thermal transfer method, as shown in FIGS. 8 and 9, an ink sheet 4 is sandwiched between the original l and transfer paper 5 and the ink sheet 4 is brought into close contact with the original l. The ink on the ink sheet 4 is melted by the heat generated when the light beam is absorbed by the image area 3 of the original 1 and transferred onto the transfer paper 5.

In addition, with the conventional thermal transfer method described above, double-sided originals and
Since there is a drawback that books etc. cannot be copied, the inventor of the present invention invented a novel copying method as shown in FIGS. 6 and 7. Below is this copying method ′(:
To explain this, in FIG. 6, the light source 11 side (two intermediate transfer sheets) 12 is placed, and the ink layer 14 is placed on one side of the film 13 (support) on the intermediate transfer sheet (12). The ink sheet 15 on which
The ink layer 14 is superimposed on the intermediate transfer sheet 12 in the direction in which it is joined, and the original image 16a that has been copied is placed on the ink sheet 15 (-) so that the original image area 16a is the supporting frame 13 of the ink sheet 15. Lay them on top of each other so that they are facing each other, and make sure that they are in close contact with each other so that no air pockets are formed between them.
For illustrative purposes, the sheets are shown separated from each other).

When flash exposure is performed using a light source 11 such as a xenon lamp in this state, the light ray α passes through the intermediate transfer sheet 12 and the ink sheet 15 and reaches the original 16 . This manuscript 1
A part of the light ray a that reaches the document 16 is scattered in the background part (for example, the white part) and a part is transmitted and does not generate heat, but in the image part (for example, the black part) 16a, the light ray a is absorbed and generates heat. The heat β generated in the image area 16a is transmitted to the ink layer 14 through the ink support film 13 and melts the ink in the portion facing the one-stroke high area 16m. Then, this melted ink 17 is transferred to a certain intermediate transfer sheet 12 in contact state C, forming a mirror image of the image area 16a.

Next, the intermediate transfer sheet 12 on which the mirror image 12a has been formed is peeled off from the ink sheet 5, and as shown in FIG. The ink on the intermediate transfer sheet 12 is melted and transferred to the transfer sheet 18 by overlapping the sheets (plain paper) and passing between the heating roller 9 and the pressure roller 220. Manuscript】
6 copies can be obtained.

Here, in the conventional copying method, the ink sheet 4 and the transfer paper 5 are used in the copying method by the inventor of the present invention (in the above-mentioned copying method, the intermediate transfer sheet 12 and i) are used.

A clear copy image cannot be obtained unless the ink sheets 15 are brought into close contact with each other so that no gaps such as air pockets are formed.

It is very troublesome to stack sheets and remove air between them each time you copy.

Furthermore, it is quite difficult to completely remove air bubbles formed between the sheets. In particular, when copying is carried out through continuous processing, the inefficiency of the work is a major problem.

Purpose This invention was made in order to solve the problems in the copying method using the thermal transfer method as described above.
The object of the present invention is to provide a copying sheet in which an ink sheet and a transfer sheet for directly transferring the ink of the ink sheet are brought into close contact with each other in advance, thereby improving the efficiency of copying work.

Structure This invention is characterized in that an ink sheet having an ink layer formed on a support and a transfer sheet are joined together with the ink layer in close contact with the transfer sheet.

The present invention will be explained below based on embodiments shown in the drawings. In FIG. 1, polyethylene terephthalate, polyethylene terephthalate,
An ink layer 41b is formed on one side of a film 41a, which is a film-like ink sheet support made of polypropylene, polyester, etc., to constitute an ink layer 4t, and a plastic film is placed on the ink layer 41b side of the ink layer 41. Further, a copy sheet 43 is formed by closely adhering a transfer sheet 42 such as paper. The ink sheet 41 and the transfer sheet 42 are tightly adhered to each other, and there are no air bubbles between the sheets. Therefore, the bonding surfaces of the ink sheet 41 and the transfer sheet 42 are attracted to each other. They do not peel off from each other when handled.

The ink material for ink sheet 4] can be any common ink material.
For example, dyes or pigments may be dispersed in wax, and in this case, the dye may be sublimable. When using a leuco dye, a clay layer is provided on the receiving surface of the transfer sheet 42 to develop color. In addition, Figures 6 to 7
In the case of a method in which transfer is performed from the transfer sheet 42 to another as in the method explained in the drawings, a clay layer may be provided on the transfer surface where the transfer is performed.

In the above-mentioned copying sheet 43, the thickness of the ink sheet 41 is preferably 3 to 10μ, since heat must be transmitted through the ink sheet 41 when copying is performed using the copying method shown in FIG. A polyethylene terephthalate film with a thin layer is good, and a thin layer is also convenient when discarding it. Furthermore, the thickness of the ink layer 4lb is preferably thin in order to prevent heat diffusion within the ink layer and damage to the melted part of the ink due to pressure, but if it is too thin, the color density will be low. Normally, a tolerance of 2 to 5 μ is good.

Transfer sheet 42 to another sheet (for example, paper) Heat: It is affected by heat, so it is necessary to appropriately select the surface energy level, bendability, smoothness, etc. For this reason, it is better to use a plastic film as a transfer sheet.In the above cases , as a retransfer body,
PPO paper (usually about 60 to 110 microns) is good.

When the copying sheet 43 is used in the copying method shown in FIG. 8 and FIG.
Lay them together so that they are in close contact with each other.

Thermal transfer is performed by exposure from this original side.

In addition, when using the copying method shown in Figs. 6 and 7, as described above, the original is
They are overlapped so that they are in close contact with each other by 411 m, and thermal transfer is performed by exposure from the transfer sheet 42 side.

When copying as described above, the copy sheet 43 is in the form of a sheet, and C2 may be used to copy each sheet. However, when copying is performed in a continuous process, It is convenient to make it into a continuous roll as shown in Figure 2). In the case of a lid made by continuous processing, there are parts where the curvature of the copy sheet 43' changes during conveyance, so it is best to have a uniform adhesion 1 as shown in FIG.
This can cause friction between the transfer sheet and the transfer sheet, putting extra load on the sheet, causing distortion in the ink layer, and even causing air bubbles to form even though they were initially in close contact. This may cause problems with the transcription of images such as

In order to solve this problem, as shown in FIG. 4, only the ink sheet 4r is made into a continuous roll.
If a sheet-shaped transfer sheet 4τ is brought into close contact with this ink sheet 4r.

It is possible to prevent stress from occurring between both sheets. The easiest way to bring the ink sheet and transfer sheet into close contact is to use electrostatic adsorption, but there are also other methods, such as a method in which a liquid is held between the two sheets (using the surface tension of the two sheets), A light adhesion method using low-molecular wax or other methods may be used.

Such a roll-shaped copy sheet 43' is similar to the above-mentioned 21!
In addition to the invention of the copying method shown in FIGS. 6 and 7, this invention is used in a novel copying apparatus as shown in FIG. 3 invented by the present inventors.

The copy sheet is guided from a supply roll 22 rotatably mounted in the casing 21 to an intermediate roller 23, whereupon the copy sheet 43' is conveyed onto the contact glass 25, and further guided to an intermediate roller 26. Wrap around the recovery roll 27 96tllJ5":fx-vlbz6・
1. A pressure plate 29 having an elastic body 28 on its lower surface is attached to the upper part of the contact glass 25 so as to be openable and closable.A flash lamp 31 connected to a capacitor 30 is attached to the lower part of the contact glass 25. A reflector plate 32 is arranged around the flash lamp 31 to reflect the light beam of the flash lamp 31 toward the contact glass 25 .

An intermediate portion 1:' between the intermediate row 226 and the collecting roll 27 is provided with a peeling portion 33 for peeling the transfer sheet of the copy sheet 43' from the ink sheet. , 'This peeled part 33
The ink sheet from which the transfer sheet has been peeled off is taken up by a recovery roll 27 (two rolls).

The transfer sheet peeled off from the ink sheet is:
The heating roller 19 and the pressure roller 20I = the position before being bitten: the paper is fed from the paper feed cassette 36; it is overlapped with the transfer paper 18 for retransfer fed by the roller 37, The paper is held between the pressure roller 20 and conveyed while being pressurized and heated, and is ejected into a paper ejection tray 35 by a pair of ejection rollers 34.

, When making copies, contact glass 2
5-゛, Place the original face down on top of the copy sheet 4, which has been fed upwards and stopped. In this state□.

-, the image side of the original is on the support side of the ink sheet (:,
・ Being faced with. Then, close the pressure plate 29 and move to the original 1., :3, 1″fEL”t””’4y-)43’
“4I0pa (・ Next, Flash Ranzo 31
After the transfer is performed, the pressure from the pressure plate 29 is released and the original is removed.Then, the collection roll 27 is driven to transport the copy sheet 4. , peeling part 3
At step 3, the transfer seeds are removed from the ink sheet and the ink sheet is wound up on a recovery roll 27. At this time, as can be seen from the drawing, the ink sheet is shaped so that the transfer sheet is peeled off at an acute angle, so image deterioration is unlikely to occur during peeling.1゜The transfer sheet peeled off from the ink sheet is At the position in front of the pair of heating roller 19 and pressure roller 220, the retransfer sheet 18 is fed by the rotation of the paper feed roller 237.
After being superimposed on each other, they are bitten by a heating roller 19 and a pressure roller 20 which are synchronously driven to rotate. Then, the ink on the transfer sheet is melted and transferred onto the retransfer sheet (1g) by the heat from the heating port 19 and fixed thereon.
□In sheet 35::#Papered.

Then, when the peeling of the transfer sheet is completed in the peeling section 33, the drive of the paper feed roll 22 and the collection roll 27 is stopped, and as the transfer sheet 1B is discharged into the paper discharge tray 35. Then, a new copy sheet is unwound from the supply roll 22 and placed on the contact glass 25 to wait, allowing the next copy to be made in succession.

In addition, when separating the ink sheet and the transfer sheet, it is easier if the ink layer is not in contact with the leading edge of the transfer sheet, and therefore, as shown in FIG. If the ink layer in the gap 43g and the tip 42''1 of the transfer sheet 42'' is removed so that the tip of the transfer sheet 42'' protrudes from the ink layer, for example, as described above, In the copying machine (FIG. 3), the ink sheet and transfer sheet can be easily separated.

, 2. Furthermore, by forming a narrow part without an ink layer not only at the leading edge of the transfer sheet but also around it, when exposed to flash light, the ink around and around the transfer sheet will melt and stain the contact glass 25. It is possible to prevent dripping or oozing ink from staining the conveying system members in the copying apparatus.

Effects As described above, the copying sheet according to the present invention has a transfer sheet and an ink sheet with an ink layer formed on one side in close contact with each other in advance, which is an important requirement when performing thermal transfer. Since the adhesion between the transfer sheet and the ink sheet is maintained, it is necessary to overlay the transfer sheet and ink sheet each time you make a copy and bleed air between the sheets to prevent air bubbles from remaining between the sheets! This method has excellent effects such as making it possible to improve the efficiency of copying work, and making it possible to perform continuous copying.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the present invention. FIG. 2 is a diagram showing another embodiment of the invention, and FIG. 3 is a diagram showing another embodiment of the invention.
A copying device that uses the copy sheet shown in the figure. Fig. 4 is a side view showing another embodiment of Fig. 1, and Fig. 5 is a side view showing another embodiment of Fig. 3.
FIG. 114 is a side view showing another embodiment, FIGS. 6 and 7 are explanatory views showing an example of a thermal transfer method, and FIGS. tR8 and 9 are explanatory views showing a conventional example of a thermal transfer method. 41.4I'... Ink sheet 41m... Ink support 41b... Ink layer 42.42', 42
”...transfer sheet 'y' P16 7 folding fan

Claims (1)

[Scope of Claims] 1. A copying sheet characterized in that a transfer member for transferring ink is laminated in close contact with the ink layer side of an ink film having an ink layer formed on a support film. 2. A copying sheet according to claim 1, characterized in that sheet-like transfer members are closely laminated on a continuous ink film with a predetermined gap between them. 3. The ink layer in a portion corresponding to the gap between the disposed transfer bodies and/or at least a part of the periphery of the transfer bodies is removed. Copy sheet.