JPH06179275A - Paper feed mechanism of line thermal transfer printer - Google Patents

Abstract

PURPOSE:To provide an oblique running correction means capable of reducing the generation of paper feed trouble due to the kind of paper. CONSTITUTION:The paper feed mechanism of a line thermal transfer printer is equipped with a pick roller 3 feeding paper 1 from a drawer 2 and a guide frame 4 generating slackening in the paper by the rear-end collision of the leading end part of the paper to correct the oblique running of the paper. Further, a slide plate 10 selectively changing slackening quantity according to the kind of paper is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeding mechanism for a line type thermal transfer printer, and more particularly to a paper feeding mechanism for a line type thermal transfer printer having a skew feeding correcting means for a print medium.

[0002]

2. Description of the Related Art Conventionally, a skew feed correcting means of a paper feeding mechanism of a line type thermal transfer printer of this type corrects a skew feed by causing a tip end of a print medium to collide with another to cause a deflection.

[0003]

The skew feeding correcting means of the paper feeding mechanism of this conventional line type thermal transfer printer is used when the rigidity of the print medium is strong, or when the ink film is stretched on the recording paper in advance. In the case of (1), an appropriate amount of bending cannot be generated, the waist is bent, and the feed roller cannot be fed.

[0004]

In the paper feeding mechanism of the line type thermal transfer printer of the present invention, the feeding means for feeding the print medium from the storage portion and the tip end of the print medium collide with each other and bend. And a guide unit for selectively changing the amount of deflection according to the type of the print medium.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. Referring to FIG. 1 showing the configuration of one embodiment of the present invention,
In the paper feed mechanism of the line type thermal transfer printer of this embodiment, the pick roller 3 feeds the paper 1 from the drawer 2 into the apparatus. The leading edge of the sheet 1 traveling along the guide frame 4 collides with the feed roller 5 to cause a deflection, thereby correcting skew feeding. The slide plate 10 selectively changes the amount of deflection depending on the type of the sheet 1 to run the sheet 1. The paper 1 is then transferred and recorded with the ink of the ink film 6 by the thermal head 8 on the platen roller 7, and is ejected by the feed roller 9.

FIG. 2 is a diagram showing a paper traveling state in the vicinity of the guide frame 4 and the feed roller 5. Details of the paper traveling state will be described with reference to FIG. When the stiffness of the sheet 1 is weak, the slide plate 10 has not moved in the sheet traveling direction, so that the sheet 1 collides with the feed roller 5 at its leading end portion, and an appropriate deflection 15 is generated. This makes paper 1
Skew is corrected. When the paper 1 is strong, the slide plate 10 moves to the position shown in FIG. 2, so that the paper 1 does not come off the feed roller 5 and causes a bend 16 to hit the feed roller 5 at its tip. , Skewing is corrected.

FIG. 3 is a view showing the structure of the guide frame 4 and the slide plate 10. Referring to FIG. 3, the guide frame 4 has fixing bases 12 for holding a shaft 11 for moving a slide plate 10 on both sides. A gear 13 attached to the shaft 11 moves the slide plate 10 back and forth.

FIG. 4 is an enlarged view of the gear 13 and the slide plate 10. A rack 14 with which a gear 13 meshes is provided on the surface of the slide plate 10. As a result, when the gear 13 rotates, the slide plate 10 moves back and forth.

[0009]

As described above, according to the present invention,
The print medium is fed from its storage unit, and the front end of this print medium collides with the print medium to cause skewing, and skew correction is performed. Depending on the type of print medium, the print medium is not selectively deflected. By causing the print-receiving medium to travel, it is possible to reduce the occurrence of paper feeding troubles due to the type of paper.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an exemplary embodiment of the present invention.

FIG. 2 is a diagram illustrating a sheet traveling state near a guide frame and a feed roller.

FIG. 3 is a diagram showing a configuration of a guide frame and a slide plate.

FIG. 4 is an enlarged view of a gear and a slide plate.

[Explanation of symbols]

 1 Paper 2 Drawer 3 Pick Roller 4 Guide Frame 5 Feed Roller 6 Ink Film 7 Platen Roller 8 Thermal Head 9 Feed Roller 10 Slide Plate 11 Shaft 12 Fixing Base 13 Gear 14 Rack

Claims (2)

[Claims] 1. A feeding means for feeding a print medium from a storage portion thereof, a skew feed correcting means for correcting a skew by causing a front end of the print medium to collide with the print medium, and A paper feed mechanism for a line-type thermal transfer printer, comprising: a guide unit that selectively changes the amount of deflection according to the type of print medium. 2. The paper feed mechanism for a line type thermal transfer printer according to claim 1, wherein the guide means is a plate-like member which selectively moves in the print medium running direction.