JPH0448636B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a means for peeling off a base film from a transfer surface after thermal transfer of a thermal transfer medium to a transfer object.

Prior Art In the conventional foil stamping method, the base film of the thermal transfer medium is peeled off from the transfer surface by instantly moving the base film upward immediately after thermal transfer. In this case, when the adhesive strength between the base film and the transfer layer is strong, there is a drawback that the transfer layer lifts due to the uncured adhesive.

Purpose The present invention has been proposed in order to improve the defects of the above-mentioned conventional technology, and is to remove the base film from the transfer surface without causing lifting of the transfer layer in the step of peeling off the base film after thermal transfer. An object of the present invention is to provide a method for peeling off a film.

Structure The present invention provides a method for peeling off a tape-shaped base film supporting a transfer layer from an object to be transferred, immediately after thermally transferring a thermal transfer medium to the object to be transferred.
After the rolled-up side of the transferred base film is clamped with clamp rolls at a position away from the surface of the transferred object, the transferred base film between the clamped portion and the surface of the transferred object is peeled off in a direction perpendicular to the peeling direction. A peeling method for a thermal transfer medium is provided, which is characterized in that a peeling bar is advanced toward the unpeeled side parallel to the surface of a transferred object while being pressed by a bar, and one embodiment thereof is shown in FIG. Based on the description of the device.

In the figure, 1 is a transfer target and 2 is a transfer layer, and the figure shows a transfer layer that has already been thermally transferred to the transfer target 1.
Reference numeral 3 denotes a tape-shaped base film that supports the transfer layer 2 at the portion where it is stacked on the transfer object 1, but the transfer layer 2 does not exist at the portion where it is peeled off from the surface of the transfer object 1. 4, presser rollers 5 on both sides,
A base film peeling bar pivotally supported by 5,
The presser rollers 5, 5 are arranged so that when the presser rollers 5, 5 roll in the longitudinal direction of the tape-shaped base film 3 on the surface of the transfer object 1, a gap is created between the periphery of the peeling bar 4 and the surface of the transfer object 1. 5 and the peeling bar 4 have different diameters. Further, the interval between the presser rollers 5, 5 is approximately equal to the width of the base film 3. 6,6 is
After clamping the transferred base film 3 with the clamp roll, the clamp roll moves slightly downward so as to approach the surface of the transferred object 1 to create a certain amount of "sag" in the base film 3 after thermal transfer, and then removes the base film peeling bar. Based on the movement of 4, the base film 3
While the base film 3 is peeled off from the transfer target 1, the base film 3 is held against the tensile force applied to the base film 3.

The device described above generally operates as follows. That is, after the tape-shaped base film 3 supporting the transfer layer 2 is transferred to face a predetermined position on the surface of a new object 1 to be transferred, the two are overlapped and pressed from the base film side with a hot press to form the transfer layer. 2 onto the transfer target 1, and when the hot press moves away from the thermal transfer position, the transferred base film 3 is clamped by the clamp rolls 6, 6, and then moved slightly toward the surface of the transfer target 1. A certain amount of slack is caused in the transferred base film 3 lying between the clamp rolls 6, 6 and the transferred object 1. Next, the base film peeling bar 4 is separated from the surface of the transferred object 1 by a certain distance, and from the transferred base film winding side to the transfer layer supply side, that is,
Move towards the hot press stamp position.
As a result, the base film 3 is peeled off in the lateral direction between the part that is adhered to the surface of the transfer object 1 and the part that is clamped by the clamp rolls 6, 6 based on the operation of the hot press. Since the base film is pushed and pulled by the bar 4, the base film near the peeling bar 4 is bent in an S-shape, and the direction in which the base film 3 is pulled in order to peel off the transferred base film 3 from the transfer target 1 is the same as the transfer direction. The base film 3 is peeled off in a direction 180° opposite to the surface, and the peeling angle θ formed between the surface of the transferred object 1 and the base film 3 approaches 180°. will be held. In this way, by moving the peeling bar 4 further toward the transfer layer supply side while holding the base film 3 between the clamp rolls 6, 6, the transferred base film 3 can be peeled off from the transfer target 1. A predetermined length of the base film 3 can be peeled off from the surface of the transfer target 1 without changing the amount. At this time, in order to peel off the transferred base film 3 from the surface of the transferred object, the base film is pulled 180 degrees in the opposite direction to the peeling surface, so that the peeling is performed in a direction perpendicular to the transferred object. There is no strong action, and the phenomenon of pulling up the transfer layer on the transfer target at right angles due to peeling off the base film 3 does not occur, so even if the base film has strong adhesive strength, it does not occur in the past. There is no risk of pock-like bubbles forming on the surface of the transfer layer.

When the peeling of a predetermined length of the base film 3 is completed, the peeling bar 4 moves to return to the old position, and the clamp rolls 6, 6 also release the clamp of the base film 3 and return to the old position at the same time. The base film 3 is wound up by a take-up reel (not shown), and the unused base film 3 is transferred to the lower surface of the hot press.

After the steps described above, one cycle of thermal transfer operation is completed.

In the above-mentioned apparatus, on both sides of the peeling bar 4 there are presser rollers 5 whose diameter is slightly larger than that of the peeling bar 4;
5 is provided, and when the peeling bar 4 moves on the surface of the transfer object 1, the presser rollers 5, 5 simultaneously move while pressing the surface of the transfer object 1, thereby removing the transfer object. 1 in a fixed position against the tensile force accompanying the peeling of the base film, and the distance between the base film peeling bar 4 and the surface of the transfer target 1 is always kept constant. The peeling state is maintained under the same conditions.

By doing so, the base film 3 can be peeled off from the relatively thin transfer object 1 without any trouble.

Note that instead of the presser rollers 5, 5, the transfer target 1 is exposed as the base film 3 is peeled off.
Further, it will be more effective if the presser plate is moved back and forth so as to follow and constantly press the portion of the surface of the transfer layer 2 close to the location where the film is peeled off.

Effect When peeling the base film and transfer layer after thermal transfer in conventional thermal transfer methods, pock-like bubbles may occur on the surface of the transfer layer due to uncured adhesive, so stable thermal transfer cannot be achieved. I couldn't do it. By adopting the method of the present invention, the peeling angle between the transfer layer and the base film can be maintained at an angle close to 180° at all times, so there is no need to apply a pulling force to the transfer layer in a direction perpendicular to the transfer surface. When the base film is peeled off, stable peeling of the base film is realized without generating bubbles as described above on the surface of the transfer layer. The method of the present invention is suitably applied to thermal transfer means for magnetic passbooks or magnetic slips.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a main part of a mechanism for peeling off a thermally transferred base film from a transfer target in a thermal transfer device, and shows means for realizing the method of the present invention. DESCRIPTION OF SYMBOLS 1...Transfer object, 2...Transfer layer, 3...Base film, 4...Base film peeling bar, 5...
...presser roll, 6...clamp roll.

Claims (1)

[Claims] 1. Immediately after thermal transfer of the thermal transfer medium to the transfer target,
In the method of peeling off the tape-shaped base film that supported the transfer layer and the transferred object, after the rolled-up side of the transferred base film is clamped with clamp rolls at a position away from the surface of the transferred object,
The transferred base film between the pinching part and the surface of the transferred object is pressed by a peeling bar perpendicular to the peeling direction, and the peeling bar is advanced parallel to the surface of the transferred object toward the unpeeled side. A method for peeling a thermal transfer medium, characterized by: 2. A method for peeling a thermal transfer medium according to claim 1, characterized in that when the transfer target is made of a thin material, the transferred base film is peeled off while pressing the surface of the transfer target.