JP2641563B2 - Transfer method of color ink - Google Patents

Description

The present invention relates to a method for transferring color ink, and more particularly, to selectively transferring a plurality of color ink layers formed on an ink ribbon.
The present invention relates to a method for transferring color ink for performing desired printing by transferring to an OHP sheet.

[Conventional technology]

Conventionally, a multi-color ink ribbon having a plurality of ink layers formed thereon is used to select an ink layer of each color of the ink ribbon and transfer the ink layer to one or two layers on OHP paper. Accordingly, thermal printers that perform color printing of a desired color are often used.

FIG. 5 shows a transfer means of a color ink layer by such a conventional thermal printer. The color ink ribbon has a yellow ink layer 1a, a magenta ink layer 1b, a cyan ink layer 1c, and a black ink layer. By sequentially arranging the layers 1d and detecting a marker formed at a boundary portion between these ink layers with a sensor, the ink layer 1 of a desired color of the color ink ribbon can be selected.

Then, according to desired print information, the ink layer 1 of a specific color of the color ink ribbon is selected and pressed against the OHP paper 2 to selectively generate heat from the heating element of the thermal head. OH
By transferring the ink layer 1 of a plurality of colors to the same location on the paper as necessary, the desired color can be printed. For example, if you want to perform vermilion printing, transfer the yellow ink layer 1a, then duplicate the magenta ink layer 1b on it,
When an overhead project device projects light so as to transmit light to the yellow and magenta ink layers 1a and 1b, it is colored in vermilion.

[Problems to be solved by the invention]

However, in the conventional thermal printer, as described above, for example, when two types of ink layers such as a yellow ink layer 1a and a magenta ink layer 1b are overlap-transferred, the printing direction of the overlap transfer portion is When a black ink layer is transferred to an adjacent dot immediately after, the two ink layers are equivalent between the overlap-transferred ink layers 1a and 1b and the transfer portion of the black ink layer 1d. Is formed, the black ink layer 1d is not properly pressed against the OHP paper 2,
As shown in FIG. 5, the ink layers 1a and 1
A blank portion 3 is formed between b and the black ink layer 1d, so that proper color printing cannot be performed, and there is a problem that a printing defect occurs.

The present invention has been made in view of these points, and even when a black ink layer is transferred adjacent to an overlapping transfer portion, a color ink which can transfer the black ink layer to paper properly. It is an object of the present invention to provide a transfer method.

[Means for solving the problem]

In order to achieve the above object, the color ink transfer method according to the present invention is configured such that yellow, magenta, cyan, and black ink layers are sequentially arranged on a color ink ribbon,
A color ink transfer method for performing color printing of a desired color by selecting an ink layer of a desired color and transferring the same to a sheet and, if necessary, overlappingly transferring the ink layers of a plurality of colors to the same location on the sheet. In the case where two black ink layers of yellow, magenta, and cyan are stacked and transferred immediately after the black ink layer is stacked adjacent to the black ink layer, the black ink layer is stacked at a position where the black ink layer is to be transferred.
One of the color ink layers is transferred, and then the black ink layer is overlap-transferred onto the ink layer.

(Operation)

According to the present invention, at the transfer position of the black ink layer,
Since the black ink layer is transferred after the ink layer of one of the two colors laminated immediately before is transferred in advance, the overlapping transfer portion between the two types of ink layers and the black ink layer are transferred. The level difference between the transfer portion of the layer and the transfer portion becomes one layer as in the case of the normal transfer, and the black ink layer can be transferred by appropriately pressing the black ink layer against the paper. It is possible to perform appropriate printing.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

FIGS. 1 and 2 show an embodiment of a thermal printer to which the color ink transfer method according to the present invention is applied. The thermal printer is provided in front of an elongated flat platen 4 fixed to a frame of a printer (not shown). Is provided with a guide shaft 5 extending in parallel with the platen 4, and a carriage 6 is attached to the guide shaft 5 by the platen 4.
Is reciprocally reciprocable along. The carriage 6 is provided with a head mounting base 7 which is freely movable toward and away from the platen 4. A thermal head 8 is mounted on a surface of the head mounting base 7 which faces the platen 4. ing.

On the upper surface of the carriage 6, a delivery bobbin 9 and a take-up bobbin 10 are rotatably erected. On the take-up bobbin 10, a ribbon drive motor 11 disposed in the carriage 6 is provided. It is connected.

A drive pulley is provided near both ends of the guide shaft 5.
A drive pulley 12 is connected to a carriage drive motor 14 that can be driven in both forward and reverse directions. A drive belt 15 having both ends connected to the carriage 6 is wound around the drive pulley 12 and the driven pulley 13. The drive belt 14 is rotated through the drive pulley 12 by rotating the carriage drive motor 14. By driving 15,
The carriage 6 is driven to reciprocate along the guide shaft 5.

A ribbon cassette 17 containing a color ink ribbon 16 therein is mounted on the upper surface of the carriage 6 so as to be engaged with the delivery bobbin 9 and the take-up bobbin 10. The ribbon 16 is guided such that an intermediate portion thereof is exposed to the outside from the ribbon cassette 17 and is located on the front side of the thermal head 8.

This color ink ribbon 16 is, as shown in FIG.
On the base layer 18 made of a long plastic film,
A yellow ink layer 1a, a magenta ink layer 1b, a cyan ink layer 1c, and a black ink layer 1d are sequentially arranged via a release layer or the like (not shown). A black or silver marker 19 formed in a width corresponding to the color of the layer 1 is formed. And
By detecting each of the markers 19 by a sensor (not shown), the ink layer 1 of a desired color of the color ink ribbon 16 can be selected.

 Next, the operation of the present embodiment will be described.

In the thermal printer, first, the head mount 7 is moved in the direction of the platen 4, and the thermal head 8 is pressed against the platen 4 via the color ink ribbon 16 and the OHP paper 2 respectively. Thereafter, the ribbon drive motor 11 is driven to rotate the winding bobbin 10,
The carriage 6 is moved along the platen 4 by winding the color ink ribbon 16 and driving the carriage drive motor 14 to drive the drive belt 15 via the drive pulley 12.

In this state, the ink layer 1 of a specific color of the color ink ribbon 16 is selected according to the desired print information, is opposed to the thermal head 8, and the heating element of the thermal head 8 is selectively heated to thereby form the ink layer. 1 is partially melted and transferred to the OHP paper 2 and, if necessary, the ink layers 1 of a plurality of colors are overlap-transferred to the same location on the OHP paper 2 to perform color printing of a desired color.

At this time, in this embodiment, the transfer positions of the ink layers 1 of each color are analyzed in advance based on the color print information, and immediately after the two layers of the ink layers 1 of yellow, magenta, and cyan are stacked and transferred. When laminating the black ink layer 1d at a position adjacent to the printing direction of the above, one of the two colors is extraly transferred to a position where the black ink layer 1d is to be transferred, and then an extra The black ink layer 1d is overlap-transferred onto the ink layer 1 of the transferred color.

FIG. 4 shows an example of this, and the yellow ink layer
When laminating 1a and magenta ink layer 1b and adjoining black ink layer 1d, extraly transfer yellow ink layer 1a transferred in the previous order to the position of black ink layer 1d, Thereafter, the magenta ink layer 1b and the black ink layer 1d are laminated and transferred to predetermined positions on the ink layer 1a.

When the color ink ribbon 16 is fed in an idle manner to select the ink layer 1 of a desired color, the thermal head 8 is separated from the platen 4.

Therefore, in the present embodiment, the step between the overlapping transfer portion of the two types of ink layers 1a and 1b and the transfer portion of the black ink layer 1d becomes one layer as in the normal transfer, and The ink layer 1d can be appropriately pressed against the OHP paper 2 and transferred. As a result, it is possible to prevent the occurrence of a blank portion or the like, and to perform appropriate printing. In particular, the present embodiment is extremely effective because the black ink layer 1d remains black even when laminated with another color.

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified as needed.

〔The invention's effect〕

As described above, the color ink transfer method according to the present invention employs a method of transferring a black ink layer to a transfer position of a black ink layer, and before transferring any one of the two previously stacked ink layers to the black ink layer. Is transferred, so that the level difference between the overlapping transfer portion of the ink layer and the transfer portion of the black ink layer becomes one layer as in the normal transfer, and the black ink layer is properly transferred. In this case, it is possible to transfer the paper by pressing it against OHP paper, to prevent the occurrence of a blank portion or the like due to the step, and to achieve effects such as proper printing.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a thermal printer to which the color ink transfer method according to the present invention is applied, and FIG.
FIG. 3 is a perspective view of a part of the color ink ribbon of FIG. 1, FIG. 4 is a partial longitudinal sectional view showing a transfer state of an ink layer according to the present invention, FIG. FIG. 4 is a partial longitudinal sectional view showing a state of transfer of an ink layer by a conventional transfer unit. 1 ... ink layer, 2 ... OHP paper, 4 ... platen, 6
... Carriage, 8 ... Thermal head, 9 ... Sending bobbin, 10 ... Winding bobbin, 11 ... Ribbon driving motor, 12 ... Driving pulley, 14 ... Carriage driving motor, 15 ... Driving belt , 16 ... ink ribbon, 17 ... ribbon cassette.

Claims (1)

(57) [Claims] An ink layer of each color of yellow, magenta, cyan, and black is sequentially arranged on a color ink ribbon,
A color ink transfer method for performing color printing of a desired color by selecting an ink layer of a desired color and transferring the same to a sheet and, if necessary, overlappingly transferring the ink layers of a plurality of colors to the same location on the sheet. In the case where two black ink layers of yellow, magenta, and cyan are stacked and transferred immediately after the black ink layer is stacked adjacent to the black ink layer, the black ink layer is stacked at a position where the black ink layer is to be transferred.
A method for transferring color ink, comprising transferring an ink layer of any one of the color ink layers, and then transferring the black ink layer over the ink layer.