JPH0214431Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of application of the invention) This invention is a type of printer in which an ink roller is brought into pressure contact with a type mask having a type surface for multiple digits, and in particular a type mask for preventing unnecessary stains on paper. The present invention relates to a paper dust removal mechanism for a printer equipped with a paper dust removal mechanism.

(Background of the invention) A conventional ink roller printer has a structure as shown in FIG. That is, the type drum 1 has a plurality of character faces 11 having characters on the outer periphery for a plurality of digits, and grooves 12 are formed between each character face 11 (between the digits).
An ink roller 2 for applying ink to the letters on the letter surface 11 is pressed into contact with the letter drum 1, and a hammer 3 is disposed opposite the letter drum 1 so as to face each letter surface 11. Furthermore, when printing a predetermined character on a predetermined character surface 11 by driving the hammer 3 of a predetermined digit, the paper 4 comes into contact with the type drum 1 and the ink of the adjacent digit is discarded onto the groove 12 of the type drum 1. 4, the comb teeth portion 51 of the comb-shaped type mask is arranged so as to slightly protrude from the type face 11, and the lower part of the base 52 of this type mask 5 is fixed to a frame (not shown). has been done.

Since the type mask 5 has the comb teeth portion 51 in this manner, paper powder 41 tends to remain on the groove bottom surface 54 of the groove 53 of the comb tooth portion 51, as shown in FIG. If the paper powder 41 remains on the groove bottom surface 54, it attracts ink applied to the typeface 11 and stains the paper 4, which is a drawback.

(Purpose of the invention) An object of the invention is to provide a paper dust removal mechanism for a printer that can remove paper dust that remains on the groove bottom surface of a type mask.

(Embodiment of the invention) An embodiment of the invention will be described below with reference to FIGS. 3 and 4. Note that the same or equivalent members as in FIG. 1 are given the same reference numerals, and their explanations will be omitted. The paper 4 is guided by a guide plate (not shown) and passes along a course between the hammer 3 and the type mask 5. A comb-shaped thin plate 6 having spring properties is provided on the surface of the base 52 of the type mask 5 on the side opposite to the paper course side.
The base 61 of is fixed. Comb tooth portion 6 of thin plate 6
2 protrudes from the base 61 toward the paper course side through the vicinity of the groove bottom surface 54 of the groove 53 of the type mask 5.

In this way, since the comb tooth portion 62 of the thin plate 6 is disposed in the groove 53 of the type mask 5, even if paper dust remains in the groove 53 of the type mask 5, it will not be removed when the paper 4 is attached to or removed from the printer. , the thin plate 6 swings from the position shown by the solid line when the paper is loaded to the position shown by the two-dot chain line when there is no paper.
Any paper powder that remains will be automatically removed.

In the above embodiment, the thin plate 6 is fixed to the type mask 5, but it may be fixed to another suitable fixing part.

(Effect of the invention) As is clear from the above description, according to the invention, the comb teeth of the type mask protrude from the side opposite to the paper course side to the paper course side through the vicinity of the groove bottom surface of the comb tooth portion of the type mask. Since a thin plate is provided, paper dust remaining on the bottom surface of the groove of the type mask is removed by the thin plate. Therefore, it does not attract ink,
Paper stains are prevented.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of a conventional printer, FIG. 2 is a perspective view of a type mask, FIG. It is a perspective view showing a thin plate. 1...Type drum, 11...Type surface, 12...
Groove, 2... Ink roller, 3... Hammer, 4...
... Paper, 5 ... Type mask, 51 ... Comb tooth section, 5
3...Groove, 54...Groove bottom, 6...Thin plate, 62...
...Comb tooth part.

Claims (1)

[Scope of utility model registration request] A type drum having type characters on its outer periphery and grooves formed between the digits so that the type surface is arranged for a plurality of digits; an ink roller that applies ink to the type drum; In a printer equipped with a hammer, and a comb-shaped type mask placed in a groove of the type drum so as to slightly protrude from the type surface, the type mask is removed from the side opposite to the paper course side of the type mask. A paper dust removal mechanism for a printer, characterized in that a thin plate is disposed so as to protrude toward the paper course side through the vicinity of the bottom surface of the groove of the comb tooth portion.