JPH0534146B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Technical Field> The present invention relates to a recording method for a color recording device, that is, a color recording device of a transfer type thermal type in which an ink film tape is heated with a thermal head to melt the ink and transferred to recording paper. It is something.

<Prior Art> Recently, compact and low-cost color hard copy devices have been actively developed, and the most popular type of device is a transfer-type thermal recording device.

This recording device uses a line-type thermal head to heat an ink film tape to melt the ink and transfer it to recording paper (plain paper), which prints yellow (Y), magenta (M), cyan (C), and Black (B)
The colors are recorded by overlapping each screen in this order (screen sequential method).

That is, the ink film tape has the above-mentioned Y, M, and C.
(Furthermore, it is a roll of tape arranged side by side in the order of B).While the tape is advanced in one direction, the recording paper is returned to the previous position each time the color changes, and it is sequentially arranged screen by screen. It is recorded by overlapping colors.

As this type of device, one having a configuration as shown in FIG. 2 has been proposed.

That is, the recording paper 2 is placed near both ends of the drive roller 21 which is connected to the drive source via the drive pulley 22.
Protrusions 21A and 21B are formed to fit into opening rows 23A and 23B provided along both sides of the recording paper 3, and the rotation of the roller 21 moves the recording paper 3 forward or backward.

The recording paper 23 touches the drive roller 21 on the way.
The paper is fed by a paper feed sprocket 24 that is linked to
It is designed to be sent upward from the bottom of the drive roller 21 via this sprocket 24.

Then, the ink film tape 26 is pulled out from the supply roll 25 on which the ink film tape 26 is wound, passes the drive roller 21 along the paper 23 below the recording paper 23, and is wound around the take-up roller 27. be equipped. Roller 2 on this winding side
7 is connected to a drive motor 28.

In addition, a line-type thermal head 29 is arranged near the bottom of the drive roller 21, and presses the ink film tape 26 onto the recording paper 23 on the drive roller 21 during recording, and heats the ink film tape as appropriate. 26 ink is transferred onto paper 23.

In such a recording device, as described above, when performing a recording operation by sequentially overlapping Y, M, and C (or even B) on each screen, the recording paper is moved forward and backward three (or four) times. At this time, if paper feeding accuracy is poor, color misregistration occurs, which is an important problem.

In other words, for example, in a 10 dot/mm device, the paper feeding accuracy for 3 (or 4) repetitions is ±0.05 mm.
(Color shift)...One dot or less is required.

However, although the above-mentioned tractor feed system is effective against paper skew, it is difficult to obtain the above-mentioned fine feeding accuracy because the protrusions must be inserted into the holes in the recording paper. Ta.

In addition, there are devices that feed the paper using a platen roller separate from the tractor feed, but with this method, the paper tends to skew or slide, resulting in misalignment, and it is also difficult to obtain the paper feeding accuracy as described above. was difficult.

<Purpose> The present invention provides a recording method for a color recording device that does not shift the position of the paper even if the paper is fed back and forth several times, in other words, does not cause color shift when recording with colors superimposed on each screen. It provides:

<Example> FIG. 1 is a diagram showing the configuration of main parts of a recording apparatus according to the present invention, in which 1 is a platen roller connected to a drive source, and 2 is a feeder disposed in contact with the platen roller 1. A roller 3 is a conveying means, which is arranged near the platen roller 1 and parallel to the roller 1, and serves as a drive source for winding the recording paper 4 fed by the platen roller 1 and the feed roller 2. These are connected rotating drums, and paper clamps 3A are disposed at predetermined locations on the circumferential surface of the drums to lock and hold the leading edge of the recording paper 4.

Reference numeral 5 denotes a line-type thermal head, which is provided below the platen roller 1 so as to move toward and away from the roller 1. After the recording paper 4 is fed by the platen roller 1 and the feed roller 2,
It passes between the thermal head 5 on the lower side of the roller 1 and is guided to the circumferential surface of the rotating drum 3 via a guide roller 6.

The leading end of the recording paper 4 is locked by a paper clamp 3A, and the recording paper 4 is sequentially wound around the circumferential surface of the drum 3 by rotation of the rotary drum 3 in the direction of arrow A. Therefore, the size of this drum 3 is set so that it can wind up exactly one screen's worth of recording paper 4.

Reference numeral 7 denotes an ink film tape, which is pulled out from a supply reel (not shown), passes between the platen roller 1 and the thermal head 5 below the recording paper 4, and is further passed through the guide roller 6. It is configured to be wound onto a take-up reel (not shown) disposed below via the holder. This ink film tape 7 is yellow (Y),
Magenta, cyan (C), and black (B) are sequentially arranged on a screen-by-screen basis, and are fed in one direction during recording.

Next, the operation of this configuration will be explained. When setting the recording paper 4, the thermal head 5 is set at a position apart from the circumferential surface of the platen roller 1, and in this state, the recording paper 4 is fed by the platen roller 1 and the feed roller 2. The recording paper 4 is fed through the underside of the platen roller 1 and the leading edge of the recording paper 4 is locked in the paper clamp 3A of the rotating drum 3. At this time, the rotating drum 3 is set at the initial position as shown in the figure by an initial position setting means (not shown).

After setting the recording paper 4 as described above and setting the ink film tape 7,
As shown in the figure, the thermal head 5 is connected to the platen roller 1 via the ink film tape 7 and the recording paper 4.
to start the recording operation.

During this recording, the recording paper 4 is rotated by rotating the rotary drum 3 in the direction of arrow A in synchronization with recording scanning.
Record one screen while feeding the paper. At this time, the ink film tape 7 is also sequentially fed. Note that during this recording, the platen roller 1 is rotated freely or driven to such an extent that the recording paper 4 does not loosen.

In this way, for example 1 for yellow
When the screen recording is finished, the rotating drum 3 is stopped and the thermal head 5 is moved to the platen roller 1.
The recording paper 4 and the ink film tape 7 are released from being pressed against each other.

Then, with the rotary drum 3 in a state where it can freely rotate, the platen roller 1 is rotated in the opposite direction to the paper feeding direction to return the recording paper 4 to its original position. Also, ink film tape 7
Align it with the next color, for example magenta.

When the recording paper 4 returns to the initial printing start position, the driving of the platen roller 1 is stopped, and the rotating drum 3 is also stopped at the initial setting position. Note that when the recording paper 4 is returned, the rotating drum 3 may also be rotated at a constant speed in the direction of arrow B to the initial setting position.

When the return operation of the recording paper 4 is completed in this manner, the thermal head 5 is pressed against the platen roller 1 via the ink film tape 7 and the recording paper 4, and the recording operation is performed in the same manner as described above.

The above actions are shown in cyan (and even black).
Do the same for Y, M, C (and B)
The predetermined recording is completed by sequentially superimposing the colors on a screen-by-screen basis.

When this series of recording is completed, the paper clamp 3A of the rotating drum 3 is released, the recording paper 4 is removed from the drum 3, and the recording paper 4 is ejected.

<Effects> As described above, in the present invention, even if the recording paper is repeatedly moved back and forth, the recording paper is fed from the initial position during recording, and there is no paper slippage, so the repeatable paper feeding accuracy is improved. It is possible to prevent color shift, which has been a problem in the past, and to obtain high-quality recorded images.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of a recording apparatus according to the present invention, and FIG. 2 is a diagram showing the configuration of a conventional apparatus. 1: platen roller, 2: feed roller, 3: rotating drum, 3A: paper clamp, 4: recording paper, 5: thermal head, 7: ink film tape.

Claims (1)

[Scope of Claims] 1. A recording method for a color recording device in which a thermal head heats an ink tape to transfer the ink to a recording paper, and each color is sequentially recorded screen by screen, with the thermal head moving from the platen roller. A process in which the recording paper is held between a platen roller and a feed roller that is in contact with the platen roller in a separated state, and the platen roller is rotated in the normal direction to convey the recording paper. a step of setting the conveying means placed at the initial position, and clamping the front end of the recording paper sandwiched and conveyed by the platen roller and the feed roller to a clamp mechanism provided on the conveying means; and transferring the thermal head. pressing the transfer ink tape and recording paper to a platen roller, feeding the recording paper in the paper feeding direction by a conveying means, and heating the transfer ink tape by a thermal head;
The process involves transferring one screen of ink onto recording paper, separating the thermal head from the platen roller, and
The process of reversing the platen roller to return the recording paper sandwiched between the platen roller and the feed roller, and stopping the reversing operation of the platen roller when the conveying means reaches the initial position is repeated as necessary, and the steps are sequentially different. A recording method for a color recording device characterized by recording in multiple colors on recording paper.