JPS59192587A - Thermal transfer recorder - Google Patents

Abstract

PURPOSE:To obtain a thermal transfer recorder capable of feeding a recording medium while stopping an ink sheet and thereby reducing the waste of the ink sheet and the number of times of replacement of the ink sheet, by providing a mechanism for retracting a back-up roll from a recording position. CONSTITUTION:The back-up roll 5' is pressed against a thermal head 4 by a lever 9 and a spring 10. The back-up roll 5' can be retracted from the pressed position through the lever 9 by rotating a cam 11 by a motor 12. When performing normal recording, the ink sheet 2 and the recording medium 1 are fed by pressing the back-up roll 5' against the thermal head 4 and a driving roll 7. When a non-recorded part having a length of not less than a predetermined value is generated on the recording medium, the motor 12 is rotated by a signal from a controlling circuit to retract the back-up roll 5', whereby only the recording medium 1 can be fed by a discharging roll 13 in the condition in which the feed of the ink sheet 2 is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermal transfer recording device that performs thermal transfer recording using an ink sheet.

A schematic diagram of a conventional heat transfer recording device of this type is shown in FIG. The recording medium 1 is overlapped with the ink sheet 2 and sent to the recording section 3. In the recording section 3, the recording medium 1 is placed between the thermal head 4 and the backup roll 5.
and ink sheet 2 are sent. The thermal head 4 is compressed by a backup roll 5 by a spring 6. The thermal head 4 has normally 94 to 16 resistors in the direction perpendicular to the recording medium feeding, and the ink on the ink sheet 2 is transferred to the recording medium 1 by selectively heating the resistors. A desired record can be obtained by transfer. By rotating the drive roll 7 at a predetermined speed, the back-up roll 5 is driven at a predetermined speed, and the ink sheet 2 and recording medium 1 sandwiched therebetween are fed at a predetermined speed. The used ink sheet 2 that has passed through the pick-up roll section is wound up by a winding roll 8, and is then rolled up onto the recording medium 1.
is discharged outside the apparatus composed of the ink sheet 2.

In the above method, drive roll and nototsuku atsufu.

Since the ink sheet 2 and the paper 1 are fed simultaneously with the roll 5, even when only a few lines are recorded on one page, the ink sheet 2 is fed at least by the length of the recording paper, which is wasteful. Replacing ink sheet 2? !
- It was necessary to perform the ink sheet frequently. An object of the present invention is to provide a thermal transfer recording device in which the waste of ink sheets and the number of replacements are reduced.

In the present invention, waste of ink sheets is reduced by having a mechanism wk for retracting the backup roll from the recording position.

According to the present invention, the recording medium can be fed in the recording section while the ink sheet is stopped. Therefore, the ink sheet is not sent unnecessarily.

Next, the present invention will be described in detail with reference to FIG. 2, which shows an embodiment of the present invention. In this embodiment, the backup roll 5' is pressed against the thermal head 4 by a lever 9 and a spring 10. cam 11 to motor 12
By rotating the backup roll 5' at , the backup roll 5' can be retracted from the crimping position via the lever.

When performing normal recording, the backup roll 5 is pressed against the thermal head 4 and the drive roll 7 to feed the ink sheet 2 and the recording medium l. If a non-recorded portion of a certain length or more occurs on the recording medium, By rotating the motor 12 in response to a signal from the control circuit and retracting the backup roll 5', only the recording paper 1 can be fed to the discharge roll 13 while the ink sheet 2 is stopped.

In this embodiment, the drive roll 7 drives the back up roll 5', but the drive roll 7 is
It may be directly driven by a motor or the like.

As described above, the present invention has the effect of preventing wasteful feeding of ink sheets and reducing the number of times of ink sheet replacement by retracting the backup roll.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a conventional method of a thermal transfer recording apparatus, and FIG. 2 is a schematic diagram showing an embodiment of the present invention.

Claims (1)

[Claims] In an apparatus that performs recording by bringing an ink sheet and a recording medium together and bringing them into contact with a thermal head using a backup roll and selectively heating a resistor, the apparatus includes a means for retracting the backup roll from a recording position. Features of thermal transfer recording device.