JPS6230050A - Recording device - Google Patents

Abstract

PURPOSE:To obtain a recording device enabling gradation recording by forming a plural kind of holes having different shapes and size to a film and changing the calorific values of each heating element for a thermal head. CONSTITUTION:When holes 2 are made sufficiently smaller than the size of heating elements 4, there are three kinds of different size in diameters thereof and a recording device is constituted by using a film having three kinds of the holes having these different diameters, the quantities of ink held by the holes 2a, 2b, 2c of three kinds differ, and energy required for ejecting ink from several hole differs. Accordingly, the quantity of ink ejected per a unit area can be altered by varying energy applied to the heating elements 6, thus enabling gradation recording.

Description

Detailed Description of the Invention (Industrial Field of Application) This invention supplies ink to a film in which micropores are formed, and heats a thermal head to eject the ink from the micropores to record on a recording medium. This relates to a recording device that performs.

[Conventional technology]

A conventional device of this type is shown in FIG. In the figure, 1 is a film, 2 is a hole formed on the film 1, 3 is a thermal head, 4 is an ink supply mechanism, 5 is a film feeding mechanism, and 6 is a heating element. Here hole 2
They all have the same shape and are similar to the same rhinoceros melon.

Next, the operation will be explained.

A film l having a large number of holes is supplied with ink to its holes 2 by an ink supply mechanism 4', and a film transport mechanism 5
Recording is performed by jetting the recording medium onto the heating element recording medium of the thermal head 3.

[Problem that the invention seeks to solve]

Since the conventional recording apparatus is configured as described above, the energy required to eject ink from each hole 2 is the same, and therefore even if the energy applied to the heating element is changed, the energy required to eject ink from each hole 2 is the same. There are only two possible ink ejection states: all ejected or no ink ejected.Therefore, there were problems such as gradation recording always required some kind of treatment such as dithering. .

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a recording device that can perform gradation recording.

[Means for solving problems]

In the recording device according to the present invention, the film has a plurality of types of holes having different shapes or sizes.

[Effect]

In this invention, since a plurality of types of holes having different shapes or sizes are provided in the film, when the energy applied to the heating element changes, the state of ink ejection changes accordingly.

〔Example〕

Examples of the present invention will be described below.

FIG. 1 shows a recording apparatus according to an embodiment of the present invention, in which 1 is a film, 2 is a hole formed on the film 1, 3 is a thermal head, 4 is an ink supply mechanism, and 5 is a film feed mechanism. The mechanism, 6 is a heating element 2. Here, the hole 2 is sufficiently smaller than the size number of the heating element 6, and there are three types of diameters with different sizes. 2b and 2C.

Next, the effects will be explained.

As shown in Fig. 1, when a recording device is constructed using a film having three types of holes with different diameters, each of the three types of holes 2a, 2b, and 2C holds a different amount of ink. The energy required to eject ink from the pores is different.

Therefore, by changing the energy applied to the heating element 6, the amount of ink ejected per unit area can be varied in four stages, thereby making it possible to perform gradation recording.

In addition, although the above example shows a case where the shape of the hole is round and the size is three types, the shape or size of the hole is not limited to these. It's okay.

〔Effect of the invention〕

As described above, according to the recording device according to the present invention, since the film is provided with a plurality of types of holes having different shapes or sizes, it is possible to record gradations by changing the amount of energy applied to the heating element. There is.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a recording device according to an embodiment of the present invention;
FIG. 2 is a block diagram of a conventional recording apparatus. DESCRIPTION OF SYMBOLS 1... Film, 2... Hole formed on the film, 3... Thermal head, 4... Ink supply mechanism,
5... Film feeding mechanism, 6... Heating element. In the drawings, the same reference numerals indicate the same or equivalent parts. Figure 1 1 °7//mumu2 Jmu3゛gu7πμto//4°l〉7741-;d) jlA 5,'71/AMi9din1 6: cold gf child

Claims (2)

[Claims] (1) A film having a large number of holes impregnated with liquid ink, a film transport mechanism that transports the film, an ink supply mechanism that supplies ink to the film, and a film that is in contact with one side of the film and heats the film. In a recording device equipped with a thermal head that ejects ink therein onto a recording medium, the film has a plurality of types of holes having different shapes or sizes, and the amount of heat generated by each heating element of the thermal head is varied. A recording device characterized in that it performs gradation recording by. (2) The recording device according to claim 1, wherein the plurality of types of holes are arranged so that adjacent hole types are combined to equalize the area ratio per unit area. .