JPH0615888A - Platen for ink jet printer - Google Patents

Abstract

PURPOSE:To achieve high quality printing by preventing the occurrence of stains in printing paper resulting from residual ink stuck on the print-receiving surface lying in opposition to a head in a platen for ink jet printer. CONSTITUTION:An ink reservoir 5b is disposed in the print-receiving surface of a platen 5 and the ink reservoir 5b is made up of a continuous groove.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a platen structure for a printer for printing characters, figures, etc. while moving an ink jet head in the row direction.

[0002]

2. Description of the Related Art In a printer having an ink jet head, the head 50 is mounted on a carriage 51, guided by a guide shaft 52, and driven along a platen 53, as shown in FIG. This driving is performed by a driving unit (not shown) via the timing belt 54, and printing is performed on the printing paper 60. Head 50
Power is supplied to the flexible cable 55. The print receiving surface 53a of the platen 53 disposed on the back side of the printing paper 60 was formed as a flat surface.

[0003]

The energization of the head is usually performed with the printing paper set, but it may be performed with the printing paper not set due to some operation error or abnormality. According to the conventional inkjet platen, since the print receiving surface is formed as a flat surface, the ink ejected from the head in such a case adheres to the print receiving surface of the platen. When a new printing paper is set, the ink adhering to the print receiving surface of the platen adheres to the leading end or the back surface of the printing paper, resulting in stains on the printing paper, which is a major obstacle to printing quality.

Therefore, an object of the present invention is to solve the above-mentioned obstacle and form a high-quality ink by forming an ink reservoir consisting of a groove continuously on the print receiving surface of the platen within the range of movement of the print head in the column direction. An object is to provide an ink jet printer of print quality.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, in the present invention, in a printer that prints on print paper while moving the print head along the platen, the print head is an inkjet system, and the platen is the print head. Is formed on the print receiving surface facing to, and the ink pool is continuously arranged at least within the range of movement of the print head in the digit direction.

[0006]

As described above, in the print receiving surface of the platen for an ink jet printer facing the print head, the ink reservoir portion consisting of the groove is continuously arranged within the range of movement of the print head in the digit direction, that is, within the print range. However, by using the ink receiving surface, the printing paper and the ink receiving surface can be brought into a non-contact state. Therefore, even if ink is ejected from the head when the printing paper is not set, the ink does not adhere to the platen surface.Therefore, even if the printing paper is newly set, the ink is adsorbed on the front or back surface of the printing paper. Ink stains do not occur.

[0007]

FIG. 1 is a perspective view of an embodiment of the present invention. The head 1 is mounted on a carriage 2 and has a guide shaft 3
Is supported by. The carriage 2 is fixed to a part of the timing belt 4 and is driven by a motor (not shown).
The directly rotated motor gear 6 and the belt drive gear 7,
It is reciprocally driven along the platen 5 via the pulley 8. Reference numeral 20 is a printing paper, and when the head 1 reciprocates from the right side to the left side in the drawing, a print drive signal is applied to the head 1 by the flexible cable 9 to print the character 10. The motor gear 6 drives the paper feed gear 11 which is supported by the paper feed gear shaft 12 by the bevel gear 6a. On the print receiving surface 5a of the platen 5, a reciprocating movement of the head 1, that is, an ink reservoir 5b formed by a U-shaped groove is continuously arranged within a print range in the digit direction.

FIG. 2 is a side sectional view of an example of the present invention.
Normally, when the print paper 20 is set, the print drive signal is applied to the head 1 to print the character 10, but the operator may perform the print operation without setting the print paper 20. In such a case, the ink ejected from the head 1 will adhere to the platen 5 because there is no print paper 20 that should be there. However, according to the present invention, the ejected ink adheres to the ink reservoir 5b. Therefore, after that, when the printing paper 20 is newly set, ink does not adhere to the leading end or the back surface of the printing paper 20 and good printing quality without ink stains is obtained. Although the groove has a U-shape, other shapes, for example, a U-shape, have the same effect.

[0009]

As described above, according to the platen for an ink jet printer of the present description, the platen is provided with the grooves continuously within the range of movement of the print head in the digit direction, and the ejected ink is discharged in the grooves. To receive. Therefore, even if the ink is ejected when the printing paper is not set, the ink adheres to the groove of the platen.There is no ink on the platen surface. It is possible to realize a platen for an inkjet printer, which does not adhere to the front and back surfaces and has good printing quality.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a side view of an embodiment of the present invention.

FIG. 3 is a perspective view of a conventional example.

[Explanation of symbols]

 1 head 2 carriage 3 guide shaft 5 platen 5a print receiving surface 5b ink reservoir 20 print paper 50 head 51 carriage 53 platen 60 print paper

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsumi Suzuki 3-5 Yamato, Suwa City, Nagano Seiko Epson Corporation (72) Inventor Toshiaki Watanabe 3-5 Yamato, Suwa City, Nagano Prefecture Seiko Epson Within the corporation

Claims (1)

[Claims] 1. A printer for printing on a print sheet while moving the print head along a platen, wherein the print head is an ink jet system, and a groove is formed on a print receiving surface facing the print head, and the groove is formed. A platen for an inkjet printer, wherein the platen is arranged continuously within at least a moving range of the print head in the digit direction.