JP2848170B2 - Paper feed mechanism of line type thermal transfer printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Heretofore, skew correction means of a paper feeding mechanism of a line type thermal transfer printer of this type corrects skew by causing the front end portion of a printing medium to collide and bend.

[0003]

The skew correction means of the paper feeding mechanism of the conventional line type thermal transfer printer is used when the rigidity of the medium to be printed is high, or when the ink film is previously stretched on a recording paper such as POP paper. In the case of (1), it is not possible to cause an appropriate bending, and the hip is broken and cannot be fed to the feed roller.

[0004]

A paper feed mechanism of a line type thermal transfer printer according to the present invention comprises a feeding means for feeding a print-receiving medium from a storage portion thereof, and a leading end portion of the print-receiving medium which collides with the paper and deflects. Skew correction means for performing skew correction by causing skew, and a plate moving in the print medium traveling direction for selectively changing the amount of deflection depending on the type of the print medium.
Guide means that is shaped like

[0005]

Next, the present invention will be described with reference to the drawings. Referring to FIG. 1 showing a configuration of an 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 end of the paper 1 traveling along the guide frame 4 collides with the feed roller 5 and skew is corrected by causing deflection. The slide plate 10 travels the paper 1 by selectively changing the amount of deflection depending on the type of the paper 1. The paper 1 is then transferred and recorded on the platen roller 7 by the thermal head 8 with the ink of the ink film 6, and is discharged by the feed roller 9.

FIG. 2 is a view showing a sheet running state near the guide frame 4 and the feed roller 5. The details of the paper traveling state will be described with reference to FIG. If the stiffness of the paper 1 is weak, the slide plate 10 does not move in the paper traveling direction, and the paper 1 collides with the feed roller 5 at the leading end thereof, and a moderate deflection 15 is generated. This makes paper 1
Is corrected. When the stiffness of 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 from the feed roller 5 but generates a flexure 16 and collides the leading end of the paper 1 with the feed roller 5. , The skew is corrected.

FIG. 3 is a view showing the configuration of the guide frame 4 and the slide plate 10. As shown in FIG. Referring to FIG. 3, the guide frame 4 has a fixed base 12 for holding a shaft 11 for moving the 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. On the surface of the slide plate 10, a rack 14 with which the gear 13 meshes is provided. Thus, when the gear 13 rotates, the slide plate 10 moves back and forth.

[0009]

As described above, according to the present invention,
The print-receiving medium is fed from the storage unit, the leading end of the print-receiving medium collides, and the skew is corrected by causing the deflection, and without causing the deflection selectively depending on the type of the print-receiving medium. By running the print-receiving medium, it is possible to reduce the occurrence of paper feed failure due to the type of paper.

[Brief description of the drawings]

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

FIG. 2 is a diagram illustrating a paper 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]

 DESCRIPTION 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 Fixed base 13 Gear 14 Rack

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B65H 5/36 B65H 9/00-9/20 B65H 29/52 B41J 13/00-13/32

Claims (1)

(57) [Claims] A feeding means for feeding a print-receiving medium from a storage section thereof; a skew correction means for correcting a skew of the print-receiving medium by causing a front end of the print-receiving medium to collide and bend; A plate-like member that moves in the printing medium traveling direction in which the deflection amount is selectively changed according to the type of printing medium.
Line type thermal transfer printer of the paper feed mechanism, characterized in that it comprises a guide means that.