JPH0446755B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a double-sided thermal transfer machine used to accurately perform thermal transfer printing on both sides of cards and the like.

(Prior art) Conventionally, in order to perform thermal transfer on both the front and back sides of an object to be transferred such as a card, thermal transfer is performed on one surface of the transfer sheet, the transfer sheet is reversed, and the same thermal transfer is performed on the back side. It was necessary to perform Therefore, in order to match the printing positions on the front and back sides, it is necessary to accurately align the transfer foil during each printing, which requires a special alignment device and makes the transfer machine expensive.
There were problems in that the handling was complicated and defective products were likely to be produced.

(Problems to be solved by the invention) The present invention solves these conventional problems,
It was completed with the aim of being a double-sided thermal transfer machine that can perform accurate thermal transfer on both the front and back sides of an object to be transferred without using a special alignment device.

(Means for Solving the Problems) The present invention, which has been made to achieve the above object, includes a foil hooking unit that sends out a transfer foil on which a printed pattern for the front side and a printed pattern for the back side are printed side by side; There is a foil folding section that folds the transfer foil sent out from the foil hooking section onto both the front and back sides of the transfer sheet, folds it in half, and cuts it into two sheets, the front and back. The present invention is characterized by comprising a thermal transfer section that performs the following steps.

(Embodiments) Next, the present invention will be described in detail with reference to illustrated embodiments.

In FIG. 1, which is a front view of the entire apparatus, and FIG. 2, which is a plan view thereof, 1 is a sheet supply section that supplies a transfer sheet 2, and 3 is a foil hooking section that sends out a transfer foil 4. Conventionally, general transfer foil 4 has a printed pattern for thermal transfer formed in a single row, but the transfer foil 4 used in the double-sided thermal transfer machine of the present invention has a third
As shown in the figure, a printed pattern 5 for the front side and a printed pattern 6 for the back side are printed side by side.
In this embodiment, the transfer sheet 2 is fed horizontally,
The transfer foil 4 is sent out in a vertical state.

7 is the transfer foil 4 sent out from the foil hanging part 3.
This is the folded part of the foil. As shown in FIG. 3, the foil folding section 7 is a part where the transfer foil 4 is folded in half from the center at point A along both the front and back sides of the transfer sheet 2 and cut vertically. Although only the form of the transfer foil 4 is shown, it will be clear to those skilled in the art that a core bar and rollers for cutting and bending are used. The transfer sheet 2 with the cut transfer foil 4 attached to both the front and back sides in this manner is then sent to the thermal transfer section 8. In this embodiment, the thermal transfer section 8 includes a low temperature transfer section 8a and a high temperature transfer section 8b, and thermally transfers the printed patterns 5 and 6 onto both the front and back surfaces of the transfer sheet 2 at the same time. Reference numeral 9 denotes a foil scrap winding unit, which takes the transferred foil scraps to upper and lower rollers 10 and 1.
0. This is the part to be wound up respectively. Note that 11 is a dancer roll portion for adjusting the tension of the transfer sheet 2;
2 is a trimming press section, and 13 is a product winding section.

(Function) The sheet supply unit 1 configured as described above is
It is a conventional method to overlap the transfer sheet 2 supplied from the transfer sheet 2 and the transfer foil 4 sent out from the foil hanging section 3, and transfer and print the printed pattern of the transfer foil 4 on the surface of the transfer sheet 2 in the thermal transfer section 8. There is no difference from a thermal transfer machine. However, in the present invention, the foil hanging portion 3
A printed pattern 5 for the front side and a printed pattern 6 for the back side are printed side by side on the transfer foil 4 sent out from the transfer foil 4, and the transfer foil 4 is cut in half at the foil folding part 7 while being cut in half. Since thermal transfer is performed at the same time after being applied to both the front and back sides of the transfer sheet 2, the printed pattern 5 for the front side and the printed pattern 6 for the back side are always at the same position on the front and back sides of the transfer sheet 2 without any positional deviation. Transfer printing will be performed. Therefore, according to the thermal transfer machine of the present invention, there is no need for a special alignment device to accurately align the printed pattern 6 on the back side with respect to the printed pattern 5 on the front side, and special care is not required during printing. However, there are many advantages such as there is almost no risk of producing defective products.

(Effects of the Invention) As is clear from the above description, the present invention is capable of accurately performing thermal transfer on both the front and back sides of a transfer target without using a special alignment device, and the device can be used at a low cost. It has many advantages, such as being easy to manufacture, requiring no special techniques for printing operations, and eliminating misalignment. Therefore, the present invention is suitable for performing accurately aligned thermal transfer printing on both the front and back sides of cards, etc., and has an extremely large contribution to the industry.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a perspective view showing the folded state of the transfer foil at the foil folding portion. 2...Transfer sheet, 3...Foil hanging part, 4...
Transfer foil, 5... printed pattern for the front side, 6... printed pattern for the back side, 7... foil folded part, 8... thermal transfer part.

Claims (1)

[Claims] 1 A foil hooking section 3 that sends out a transfer foil 4 on which a printed pattern 5 for the front side and a printed pattern 6 for the back side are printed side by side, and a transfer foil 4 fed out from this foil hooking section 3.
A foil bending section 7 that folds the foil along both the front and back sides of the transfer sheet 2 and cuts it into two sheets, the front and back, and a thermal transfer section 8 that simultaneously performs thermal transfer on both the front and back sides of the transfer sheet 2 in this state. A double-sided thermal transfer machine featuring the following features: