JPS6013574A - Recorder - Google Patents

Abstract

PURPOSE:To record an image in colors with high resolution and little misregistration of colors, by providing a movable positioning means which is reciprocated over a recording length while holding the leading end of a recording paper when moving the paper for recording, and a driven roller which is rotated following up to the paper. CONSTITUTION:A thermal head 11 is moved to a position 11A while pinching the recording paper 15 by levers 25 of a movable unit 19, a platen roller 17 is rotated in the direction of an arrow B to remove a sag of the paper 15, and the unit 19 is moved to a position 19A by a wire 21 to perform initial positioning of the paper 15. Then, the head 11 is lowered to the position 11, an ink sheet 12 and the paper 15 are pressed against the roller 17, a driving clutch for the roller 17 is disengaged, and the head 11 is operated to generate heat while moving the unit 19A in the direction of an arrow C, whereby the sheet 12 is heated and thermal transfer recording in the first color for color recording is performed. Therafter, thermal transfer recording is repeated in the second color and the third color in a similar manner. Accordingly, reproducibility of recording position in plural times of recording is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a recording apparatus such as a thermal transfer recording type color printer using heat-melting ink or heat-sublimating ink.

Conventional configurations and their problems In recent years, CR has been developed using personal computers and CAD systems.
T-displays are rapidly becoming colorized. A color printer using a thermal transfer recording method is expected to be used as a hard copy device for these color systems, and efforts are being made to improve image quality.

A conventional recording apparatus will be described below, taking a thermal transfer recording type color printer using heat-melting ink as an example.

FIG. 1 shows a side view of a conventional thermal transfer recording type color printer, and 1 shows the thermal side.

In this case, it is assumed to be a line head, and it can be moved to the position indicated by the dotted line 1A. 2 is an ink sheet for thermal transfer recording coated with hot-melt ink; 3 is a take-up roll for the ink sheet 2; 4 is a supply roll for the ink sheet 2; 6 is a recording paper;
6 is a supply roll for the recording paper 5, and 7 is a platen roller that brings the ink sheet 2 and the recording paper 5 into close contact with each other and transfers them against the thermal head 1, the outer periphery of which is molded with a rubber material. 8 is a suppression roller that presses the recording paper 6 against the platen roller 7.

First, the operation of the conventional recording apparatus configured as described above will be explained. The principle of a color printer using a thermal transfer recording method is simple.As shown in Fig. 1, the ink sheet 2 and the recording paper 6 are brought into close contact with each other, and the thermal spatula 1-11' is pressed down, and the heat generated by the thermal head 1 causes the ink sheet 2 to be pressed. The ink sheet 2 is heated to melt the hot-melt ink applied to the ink sheet 2, and the recording paper 5 is transferred. A plan view of the ink sheet 2 is shown in FIG. Heat-melting inks of each color, Y for yellow, M for magenta, and C for cyan, are applied, and as shown in FIG. 1, yellow, magenta, and cyan are sequentially superimposed and transferred onto the recording paper 5.

Therefore, since the ink sheet 2 advances only in one direction as indicated by arrow A, the recording paper 5 must be returned to its original position each time the color changes. When returning the recording paper 5, the thermal head 1 is moved to the position indicated by the dotted line 1A, and only the recording paper 5 is rewound by the platen roller 7 and the pressure roller 8. In this way, the heat-melting ink of each color is repeatedly transferred and recorded from the ink sheet 2 to the recording paper 5.

In a recording device such as ``Two Sets'', alignment of the colors recorded first and the colors recorded later becomes an important issue.
This positional shift is particularly called color blurring. Most of the causes of color shift are due to the repositioning of the recording paper 6 when returning it to its original position and recording again. It is due to gender. In recent years, there has been an increasing demand for higher resolution image quality in thermal transfer recording type color printers. For this purpose, it is necessary to reduce color misregistration as much as possible, and the transport mechanism for the recording paper 5 is required to perform a highly accurate paper feeding operation. However, 41 in Figure 1
Like the 4-format printer, the mechanism for transporting the recording paper 5 is a roller drive system, which poses a problem in improving the precision of paper transport.

On the other hand, since the platen roller 7, which is a transfer roller in the conventional example, reciprocates the recording paper 5 by frictional force, slips are likely to occur. To avoid this, the pressing force of the suppression roller 8 and the thermal head 1 is increased, but it is difficult to maintain a stable frictional force because the surface of the platen row 27 is easily contaminated with paper scraps and the like. That's funny.

Further, since the heat-fusible ink is thick when it is transferred and recorded on the recording paper 6, this causes thickness unevenness and changes the paper feed amount. These unstable conditions differ not only in the longitudinal direction but also in the width direction of the recording paper 5, which affects the paper feeding amount unevenly, and as a result, deteriorates the reproducibility of the highly accurate position of the recording paper 5 during reciprocation. This has made it difficult to solve the problem of further reducing color shift in high-resolution color recording.

Purpose of the invention: The present invention solves the above-mentioned conventional problems.
It is an object of the present invention to provide a recording device that can be applied to a thermal transfer recording device or the like that can reduce color shift in order to obtain higher resolution image quality.

Structure of the Invention The present invention is a recording apparatus that includes movable positioning means that holds the front end of a recording sheet during recording movement and reciprocates over two recording lengths, and a driven roller that rotates following the recording sheet. . The reproducibility of the initial 1tJJ position, transport direction, and transport amount during reciprocal transport of recording paper is improved by using the rjJ dynamic positioning means and the driven roller, and color shift in color recording is drastically reduced. .

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described. FIG. 3 is a side view showing the configuration of a recording apparatus in an embodiment of the present invention. In the figure, 11 is a thermal head, and the dotted line 1
It is movable with a position dimension of 1A. 12 is an ink sheet for thermal transfer recording, 13 is a supply roll for the ink sheet 12, and 14 is a take-up roll. 15 is a recording paper, 16 is a supply roll for the recording paper 15, and 17 is a platen roller that presses the recording paper 16 and ink sheet 12 against the thermal head 11 in close contact with each other. In the opposite direction, it is separated from the drive source using a one-way clutch or the like, and can be rotated as a result of movement of the recording paper 16.

Note that the outer periphery of the platen row 217 is molded with a rubber material. 18 is a suppression roller that presses the recording paper 15 against the platen row 217; 19 is an id moving unit;
A guide stay 21 is movable to the position indicated by the dotted line 19A and movably supports the 20L/i moving unit 19, and 21 is a transfer wire that connects to the moving unit 19 and transports it.

Reference numeral 22 denotes a drive pulley for driving the transfer wire 21, which is rotationally controlled by the pulse motor 9 and causes the moving unit 19 to reciprocate. 23 and 24 are relay wires on which the transfer wire 22 is attached. 25 is provided in the mobile unit 19;
The holding lever is rotatable around the spindle pin 26, and holds the recording paper 15 over its entire width in the holding portion 25A. 27 is a tension spring that applies a small clamping force to the clamping lever 25; 28 is a release lever that pushes and rotates the clamping lever 25 to release the recording paper 15 from clamping;
It is rotatable around the support pin 29. 3o is an electromagnetic solenoid connected to and driven by the release lever 28.

The operation of the recording apparatus of one embodiment configured as described above will be described below. When recording starts, first, as shown in FIG.
Move to position A.

Next, torque is applied to the platen roller 17 in the direction of arrow B to rotate it, but at this time the recording paper 16 and the platen roller 1
7 means pickpocket 1. The recording paper 16 is not fed unless the moving unit 19 is moved. Due to this rotation of the platen roller 17, the recording paper 15 between the moving unit 19 and the thermal head 11 is loosened and is held and fixed by the moving unit 19 and the holding lever 25. Next, move unit 1 to the position indicated by dotted line 19A.
9 is moved by the transfer wire 21, and the moving unit 1
The rotation of the platen roller 17 in the direction of arrow B makes the recording paper 15 between the recording paper 9 and the platen roller 17 tight, and the recording paper 15 is positioned in its initial state. At this time, since the holding lever 25 holds and positions the recording paper 15 over its entire width, reliable positioning is achieved in both the longitudinal direction and the width direction. Next, the thermal head 11A (dotted line position) is lowered to the position indicated by the solid line 11, and the ink sheet 12 and recording paper 15 are placed on the platen roller 17.
, and after separating the driving position of the platen roller 17 via the clutch mechanism, while moving the moving unit 198 (dotted line position) in the direction of arrow C, a printing pulse is applied to the thermal head 11 to generate heat, Ink sheet 1
2 is heated to perform transfer recording of the first color of color recording, for example, yellow. At this time, the recording paper 15 is moved to a moving unit.

1-19A, the platen roller 17 is pulled in the direction of arrow C, and the platen roller 17 is driven to rotate in the direction opposite to the direction of arrow B to feed the paper. The ink sheet 12 is transported in the direction of the arrow by the frictional force with the recording paper 15, and is moved to the take-up roll 1.
4.

In this way, transfer recording of the first color yellow is performed at L2 until the moving unit 19A returns to the position indicated by the solid line 19,
When this is completed, the thermal head 11 is raised to the position indicated by the dotted line 11A. While holding the recording paper 15 between the moving unit 19, move the dotted line 19A again in the same manner as the first operation.
Then, similarly to the case of the first color yellow, the second color magenta is transferred and recorded, and after this is completed, the third color cyan is transferred and recorded in the same manner. After cyan transfer recording is completed, move unit 1.
9 is in the solid line position, the electromagnetic solenoid 30 is operated to release the clamping lever 26. Thereafter, the thermal head 11 is raised to the position indicated by the dotted line 11A, and the recording paper 15 is pulled out in the direction of arrow E, completing a series of color recording steps.

As described above, in this embodiment, the moving unit 19 that moves linearly is provided with the clamping lever 26, and when holding and fixing the recording paper 15 and transporting it back and forth, the platen roller 17 is driven to rotate in one direction and rotated in the other direction. Driven rotary type. This ensures the initial positioning of the recording paper 15 in the longitudinal direction, O/width direction in the 7th and 11th thermal direction, and also improves the paper feeding accuracy during recording by adjusting the frictional force of the rollers as in the past. Because it can be improved in a non-reliant way,
The reproducibility of transfer recording positions for the second and third colors in the color recording process can be greatly improved.

In addition, in one embodiment, the moving unit 19 and the clamping lever 26
Although the gripping lever 26 is configured to reciprocate linearly, the gripping lever 26
may be provided on a rotating member such as a drum and moved back and forth. Furthermore, although the holding lever 25 has been shown to hold the recording paper 16 over its entire width, it goes without saying that the holding lever 25 may hold the recording paper 16 at several locations including both ends in the width direction.

Effects of the Invention As described above, according to the recording apparatus of the present invention, there is provided a movable positioning means that reciprocates the recording length while holding the front end of the recording paper during recording movement, and a movable positioning means that rotates following the recording paper. By providing a driven roller, it is possible to improve the reproducibility of the recording position on the recording paper in multiple recordings, and to enable high-resolution color recording with little color shift, and its industrial curvature value is high.

[Brief explanation of the drawing]

FIG. 1 is a side view of a color recording device using a thermal transfer recording method in a conventional example, FIG. 2 is a plan view of an ink sheet for thermal transfer recording in a conventional example, and FIG. 3 is a side view of a recording device in an embodiment of the present invention. It is. 11.11A...Zamarhesod, 1st end...
...Platen roller, 19,19A...Movement unit, 25...Pinch lever. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3

Claims (1)

[Claims] a recording means for recording multiple times overlappingly on a reciprocating recording paper, a movable positioning means for holding a front end of the recording paper during recording movement and reciprocating at least a recording length, and pressing the recording paper into contact with each other; a driven roller that rotates following the recording paper, the driven roller is arranged at or near a recording position of the recording means, and the recording paper is stretched and transported in accordance with the movement of the movable positioning means. A recording device designed to