JPS5914988A - Thermal paper - Google Patents

Abstract

PURPOSE:To provide thermal paper capable of performing multicolor printing through the imagewise heating due to thermal head without carrying out such an operation that paper is transferred at every one color and a color is developed each time under heating by the thermal head, obtained by coating paper with paints forming colors under heating partially at every each color. CONSTITUTION:For example, color forming paints converted to various colors under heating are applied to parts (a-c) encircled by broken lines and every each item. Sheet 7 coated with the color forming paints are put in a ticket stocker 8 and sent out by a delivery roller 9 to be passed under a thermal head 11 corresponding to a platen 10. Because each paper 7 imagewise heated by the head 11 is subjected to color forming treatment beforehand, only a heated part forms a color and a character, a symbol or a figure are subjected to multicolor printing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to thermal paper for printing in multiple colors using a thermal printer.

Previously, printing with thermal printers was limited to black and white printing, but with the spread of thermal printers, admission tickets9
There is a growing demand for multicolor printing on train tickets and other printed materials.

In order to meet this demand, the following thermal multicolor printing methods are currently being developed.

(1) Transfer method using color ribbon This method will be explained with reference to the drawings. In Figure 1, 1 is paper, 2 is a platen, 3 is a color ribbon, 4 is a thermal head, and 5
6 is a ribbon winder, and 6 is a cutter. color ribbon 3
As shown in FIG. 2, Y is yellow, C is cyan, and M is magenta, and inks of these three primary colors are applied in a band shape on the ribbon.

In this color transfer method, ink applied to a color ribbon 3 is heated by a thermal head 4.

In the case of multicolor printing, it is transferred to paper 1.

-The paper is reversed every time a color is transferred to transfer the 9th color. For example, first, yellow Y is transferred, then the paper is reversed and 5th order cyan C is transferred, and then the paper is reversed again and magenta M is transferred. It's amazing.

It is necessary to transfer the paper back and forth at least three times.

As described above, instead of feeding the paper back and forth three times, there is also a method of rotating the paper three times and performing color transfer. That is,
As shown in Figure 3, the platen 2 has a mechanism that can hold one sheet of paper, rotates the sheet together with the platen three times, and during that time heats the paper with the thermal head 4 according to the color print signal. , transfer the three primary colors of Majienda color ink.

By the way, in the conventional method as described above, the paper has to be reversed or rotated for each color and heated by a thermal head each time, so the mechanism is complicated and it takes a long time to issue tickets. There were drawbacks.

The present invention aims to eliminate the above-mentioned drawbacks, and provides thermal paper in which a paint that develops color when heated is applied to the paper surface, and then colored by a thermal head. be.

Hereinafter, one embodiment of the present invention will be explained with reference to the drawings.

In the area enclosed by the dashed line on the paper, as shown in the example below.

Each item is coated with coloring paint that changes colors when heated. Figure 4 shows the ticket. A is black, 9 tickets are red, and C is blue. Figure 5 shows the boarding pass, where A is black, 9 is red, and No is blue.

Apply black paint to the second part, green to the first part, and red to the first part (3). Figure 6 shows the delivery card, with 9 black holes for A, red for E, blue for C, H, green for 2 and T, and black or blue colored paint applied for H.

Then, as shown in FIG. 7, a sheet of paper coated with a 9-color paint is placed in a 7-ft paper stocker 8, sent out by a delivery roller 9, and passed under a thermal head 11 corresponding to a platen 10. Since the sheet of paper heated pixel-wise by the thermal head 11 has been color-developed in advance, only the heated areas develop color.

Characters, symbols, 9 figures, etc. are printed in multiple colors.

In the above example, the case where the ticket pieces are processed one by one is described, but as shown in FIG.

The present invention can also be applied to the case where roll paper is coated vertically or, as shown in FIG. 9, when coated horizontally. In both figures, 9 For example, A is black and 1 is red.

The first part is painted blue, and the second part is painted green.

As mentioned above. In the case of multicolor printing, the thermal paper according to the present invention does not perform transfer using a color ribbon, but instead coats the paper with coloring paint and heats the paper pixel-wise with a thermal head (4) Multicolor printing This is possible because the process of applying colored paint can be easily done in advance.

Compared to conventional methods, this method has extremely superior advantages in that it does not require a complicated mechanism and takes less time to issue tickets.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an example of a conventional thermal multicolor printing device, Fig. 2 is a plan view showing the configuration of a color ribbon, and Fig. 3 is an explanatory diagram showing another example of a conventional thermal multicolor printing device. It is. 4 to 6 show examples of tickets using thermal paper according to the present invention, and FIG. 4 shows a ticket,
Figure 5 shows the boarding pass, and Figure 6 shows the payment card. Figure 7 shows an embodiment of a thermal multicolor printing device using thermal paper according to the present invention, Figures 8 and 9 show examples of thermal paper according to the present invention, and Figure 8 shows a roll. FIG. 9 is a perspective view of paper coated with coloring paint in the vertical direction; FIG. 9 is a perspective view of roll paper coated with coloring paint in the horizontal direction. 2.10 Nibraten. 4.11: Thermal head. I99 Ro, Honey, Ho, He, To, Chi: Coloring paint.

Claims (1)

[Claims] 1. Thermal paper is characterized in that a paint that develops color when heated is partially applied onto the paper in different colors, and heated pixel-wise by a thermal head to enable multicolor printing.