JPS60192681A - Printer - Google Patents

Abstract

PURPOSE:To contrive both high speed and low running cost, by a construction wherein the first and second cartridges are provided, and either one of them is selectively driven. CONSTITUTION:A cartridge 3 enclosing a monocolor ink sheet 10 and a cartridge 4 enclosing a tricolor ink sheet 11 provided with yellow, magenta and cyan inks are disposed in upper-lower relationship, and the ink sheets are taken up respectively by take-up shafts 12, 13 while exerting a back tention thereto by a shaft 9. When printing in black and white in response to an external command (a), a taking-up mechanism 6 is stopped while a taking-up mechanism 5 is driven by a selecting and driving part 7 to take up the monocolor ink sheet 10. On the other hand, a head base 12 is moved and placed in front of the sheet 10 by a controlling means 8. When printing in colors, operations opposite to the above are conducted.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to at least a resistive layer that generates heat when energized and
The present invention relates to a printing device using a transfer sheet having a colored ink layer whose viscosity is reduced.

[Prior art]

In a conventional printing device that uses at least a transfer sheet that has a resistance layer that generates heat when energized and a colored ink layer whose viscosity decreases when heated, it is possible to print a color image.

Two methods were used to print black and white characters.

Before explaining the answer, the principle of the above printing method will be explained. As shown in FIGS. 1A and 1H, a transfer sheet having a layer 40 that generates heat due to a small amount of common electricity and a colored layer 41 whose viscosity decreases due to heat is used to connect a bottle electrode 421141 or a bottle electrode with 451M+ is applied to perform transfer printing on the paper 44 (46 in FIG. 2B is the base material). In this method, as shown in FIG. 2A.

As shown in B, since the heat generation distribution can be created, the transfer temperature threshold *) Since the V dot 47 is quite steep, it is possible to modulate the area of the transfer dot by applying energy. .

Therefore, the printing characteristics of this method can be said to be similar to the normal halftone dot printing method, which uses 2-silver density, constant screen line number (dot pitch), and expresses gradation by dot area modulation.

The curve in FIG. 3 is the printing characteristic of this method. Although the applied energy can be varied depending on the voltage and the voltage application time, it is preferable to keep the voltage constant and modulate only the pulse width, from the viewpoint of compatibility with thermal processing and digital circuits.

Due to this printing principle, there are two methods for enabling both color image printing and black and white color image printing, which are explained below.

The first method uses a transfer sheet that sequentially holds colored ink layers of four colors, yellow-magenta, cyan, and black, at a pitch equal to the line width. An example of this is shown in Figure 4. The disadvantage of this method is that if only black and white printing is performed continuously, the entire color printing area becomes wasted, resulting in a four times higher running cost.

The second method uses a transfer sheet containing only the three colors yellow, magenta, and cyan, and overlaps the six colors to produce equivalent black and white printing.The disadvantage of this method is that it takes five times as long. However, sharp, high-density printing cannot be expected due to the relationship between register storage and color blemish.

〔the purpose〕

The present invention eliminates these drawbacks and aims to provide a printing device that is compatible with high speed and running cost.

〔overview〕

The printing device of the present invention uses a transfer sheet having at least a resistance layer that generates heat when energized and a colored ink layer whose viscosity decreases when heated. A first cartridge that holds a transfer sheet, a second cartridge that holds a color transfer sheet that sequentially holds colored ink layers of three colors, and a relative relationship between the head substrate and the first and second cartridges. a first winding mechanism that winds up the first cartridge; a second winding mechanism that winds up the second cartridge; and a first winding mechanism that winds up the second cartridge. a selection drive unit that drives one of the two winding mechanisms, and selects either the first or second cartridge based on an external command and places it in front of the head substrate; The cartridge on the side is driven by a selection drive section.

〔Example〕

The present invention will be described in detail below based on examples.

A head substrate 2 on which an electrode array 1 is mounted as shown in FIG. 6 is used, and the structure is as shown in FIG. 5.

A first cartridge 5 holding a single color ink sheet 10 and three color ink sheets 1 of yellow, magenta and cyan.
The second cartridges 4 holding the ink sheets 1 are stacked in two stages, and the ink sheets are wound up by the winding shafts 12 and 13 while applying pack tension by the shaft 9.

For example, if you want to print in black and white using an external command,
the second winding mechanism 6 is stopped by the selection drive section 7;
At the same time, the first winding mechanism 5 is driven to wind up the monochromatic ink sheet.

On the other hand, since an external command instructs to print in a single color, the control means 8 moves the head substrate 12 to place it in front of the monochrome ink F-) 10.

12 and 13 are drive shafts that drive the second cartridge 4 and the first cartridge 3, respectively.

Conversely, when performing color printing, the above operations are performed in reverse.

〔effect〕

As described above, according to the present invention, it is possible to provide a printing device that can perform incandescent printing at high speed and at low running cost, and can also perform color printing immediately upon external command.

[Brief explanation of the drawing]

Figure 1 (a) * (b), Figure 2 (a) (a), (b), (c), (b) (a), (b), (c), Figure 6,
FIG. 4 is an explanation of a conventional printing apparatus, and FIGS. 5 and 6 are explanations of an actual travel example according to the present invention. 1 is an electrode array, 2 is a head substrate, 6 is a first cartridge, 4 is a second cartridge, 5 is a second winding mechanism, 6 is a first winding mechanism, 7 is a selection drive unit, and 8 is a control means. Above Figure 1 (α) (υλ Figure 21 Figure 40 Figure 5I\1\1''S6 Figure

Claims (1)

[Claims] A printing device that uses a transfer sheet that has at least a resistance layer that generates heat when energized and a colored ink layer whose viscosity decreases when heated, includes a head substrate on which an electrode array is mounted, and a monochrome transfer sheet. A relative positional relationship between a first cartridge holding a color transfer sheet, a second cartridge holding a color transfer sheet holding colored ink layers of three colors in order, and the head substrate and the first and second cartridges. ;l
a first winding mechanism that winds up the first cartridge; a 20th winding mechanism that winds up the second cartridge;
It has a selection drive section that drives either one of the winding and retrieval mechanisms of "J2, and the said first or first one" 717
'1 Cart I+-) Suno [4th edition 11-Lending MoejlJ
A printing device characterized in that the cartridge is placed in front of a substrate and the cartridge on the side to be selected is driven by a selection drive section.