JPS602391A - Heat transfer type printer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a thermal transfer printer with an improved means for separating a recording paper and an ink sheet.

BACKGROUND ART In general, as shown in FIG. 1, a recording head is used in which an ink sheet 1 and recording paper (plain paper) 2 are fed in steps in the sub-scanning direction, and a plurality of recording elements are arranged in one line in the main-scanning direction. In a thermal transfer printer, in which the ink sheet 1 and the recording paper 2 are brought into pressure contact between the ink sheet 1 and the platen row 24, recording is performed sequentially by thermal transfer according to each line of data. A separation claw (or separation roller) 5 is provided at a location not far from the basket, and peels off the ink sheet 1 and recording paper 2 that are in close contact with each other after recording according to the movement of the grating roller 4 as it rotates! I try to let them do it. Also, at that time, the peeled ink sheet 1
The ink sheet 1 is wound onto the take-up roll 6 side with an appropriate tension so as not to loose the length.

However, in such conventional thermal transfer printers, the ink sheet 1 and the recording paper 2 are fed in steps according to recording and are peeled off in a state where the peeling operation is intermittent. During this period, there is a problem that the recording surface is disturbed due to absenteeism, resulting in periodic ink unevenness in the form of lines.Also, when the ink sheet 1 and the recording paper 2 are separated, the ink sheet Since the winding of step 1 is performed intermittently, the ink sheet is suddenly pulled during winding and a large amount of stress is instantaneously applied to the peeled part, which causes part of the transfer ink to peel off and cause dots to fall out. Purpose of the present invention (This invention was made in consideration of the above points, and it prevents the recording surface from being disturbed or missing dots when the ink sheet and recording paper are peeled off after transfer.) DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

In the thermal transfer printer according to the present invention, as shown in FIG. In a method in which a single sheet of recording paper 2 is brought into pressure contact between a recording sheet 3 and a platen roller 4 and is fed in steps by the rotation of the platen roller 4, recording is performed sequentially by thermal transfer line by line. A guide plate 10 is provided to guide the transport of the ink sheet 1 and the recording paper 2 by a length of at least one page while keeping the ink sheet 1 and recording paper 2 in close contact with each other. C is pulled out at an acute angle and wound onto the take-up roll 6, and the corner portion A of the guide plate 1° where the window 11 is formed acts as a separating claw to separate the ink sheet 1 and the recording paper 2. I am trying to get them to do this. The peeled recording paper 2 is linearly fed on a guide plate lo and discharged onto a tray 12. Sensors 81 and 82 are provided on the output side of the guide plate 10, respectively, to detect the edges of the recording paper 2. The recording head 3 is placed in the recording position with a constant pressure applied by the spring 13, and the motor M
The recording head 3 can be removed from the recording position by driving the cam 14 by the IFC. Further, the driving force of the motor M2 is constantly applied to the take-up roll 6 via a sliding mechanism (not shown) consisting of a helical spring or the like on its shaft, so that the ink sheet 1 does not sag when the recording head 3 is loaded. The ink sheet 1 can be wound onto the take-up roll 6 with an appropriate tension so as not to cause any damage.

In the thermal transfer printer configured as described above, especially in the present invention, the ink sheet 1 and the recording paper 2 after transfer are
When peeling off the ink sheet, wind up the ink sheet using the conventional process 5.
Instead of intermittent vCh according to the step feed by rotation of the platen row 24, the recording head 3?
Il- Technique 5 for taking a means to cause the ink sheet 1 to be smoothly separated from the recording paper 2 by causing the motor M2 to continuously wind up the ink sheet 1 in the detached state. It depends on what you have done.

That is, first, the recording head 3 is placed in its recording position, and with the ink sheet 1 and the fed recording paper 2 in pressure contact with each other, the ink sheet 1 is fed in steps one line at a time by frictional movement caused by the rotation of the platen roller 4. Meanwhile, recording by thermal transfer is performed one after another. The ink sheet 1 and the recording paper 2 that have passed through the transfer stand are sent onto the guide plate 10 while remaining in close contact with each other. At that time, the ink sheet 1 is moved by the motor M2.
However, since the ink sheet 1 is restrained at the recording position, the sliding mechanism acts appropriately to prevent the ink sheet 1 from becoming sagging (as it is being wound At the point when the recording for one page is completed and the rear end of the record g2 is detected by the sensor S1 (the leading edge of the record g2 reaches the window 11 in the guide plate lO),
), a system controller (not shown) is configured to cause the recording head 3 to be removed in accordance with the sensor output. Then, the restraint of the ink sheet 1 at the edge recording position is released, and the ink sheet 1-1 is continuously wound up by the motor M2 without any action of the sliding mechanism, as shown in FIG. Then, the ink 7-t 1 and the recording paper 2 are successively separated from each other at the corner portion A of the guide plate '10.

Note that sensor S1 detects the trailing edge of the recording paper 2 by tracking the white level state at the margin of the recording paper 2 and detecting the trailing edge of the recording paper 2 when the white level changes to the black level of the ink sheet 1. I'll let you judge, I'll give it a 5. Also,
Instead of tripping the recording head 3 9iJ after the trailing edge of the recording paper 2, the leading edge of the recording paper 2 is connected to the sensor S1.
After the detection, a control means may be taken to perform a predetermined step If to determine that the tip has reached the peeling position 1fK and cause the recording head 3 to be tripped.Finally, 1 The recording paper 2 is separated by ψ1 for one page.
When the trailing edge is detected by the sensor S2, the system controller causes the recording head 3 to be inserted in accordance with the sensor output to start the arrow recording cycle. The paper is discharged onto the tray 12.

In this way, in the present invention, the recording surface is disturbed in order to maintain a constant state of peeling between the ink sheet 1 and the recording paper 2 while winding the ink sheet 1 continuously rather than intermittently. Furthermore, since there is no sudden change in the tension of the ink sheet 1 that is being wound up during peeling, the transfer ink does not peel off and dots or the like do not occur. This is a process that can maintain high quality transferred images and images.Also,
In the thermal transfer printer according to the present invention, since the separation position between the ink sheet 1 and the recording paper 2 is separated from the recording position by at least one page length, the ink sheet 1 and the recording paper 2 are fused and transferred to the recording paper 2 side at the time of separation. The ink is sufficiently solidified, and the ink sheet 1 is
Combined with bending the chisel at an acute angle with respect to the recording paper 2 and pulling it, it is possible to effectively prevent the transfer ink from being peeled off during peeling. moreover,
When the ink sheet 1 and the recording paper 2 after transfer are sent along the guide plate 1o until they reach the separation position, the ink sheet 1 is If partial lifting occurs between the recording paper 2 and the recording paper 2, there is a high possibility that the transfer ink will peel off. A potential of one polarity is applied to the guide plate 10, and a precept of the other polarity is applied to the recording paper g2 being conveyed thereon via the brush 15, so that the suction force due to seikan qi is applied to the recording paper 2 and the guide plate 10. The device is designed to be able to take appropriate measures to keep the ink sheet 1 and the recording paper 2 in close contact with each other and convey them in a single state.

As described above, in the thermal transfer printer according to the present invention, an ink sheet and a single sheet of recording paper are brought into pressure contact between a recording head and a platen roller, and are fed step by step by the rotation of the platen roller, line by line. In a system that sequentially records by thermal transfer, there is a means for transporting the ink sheet and recording paper after transfer by at least the length of the recording paper, and a means for transporting the ink sheet and the recording paper by at least the length molecules of the recording paper, and a means to convey the recording paper when the leading edge of the recording paper reaches the peeling position. The ink sheet is provided with a detection means and a means for forcibly pulling the ink sheet with a constant force by at least the length of the recording paper in accordance with the detection output to separate the ink sheet and the recording paper. This method has the excellent advantage that the ink sheet and the recording paper can be separated after transfer without disturbing the recording surface or causing missing dots.

[Brief explanation of the drawing]

FIG. 1 is a simplified diagram showing the configuration of a recording head and platen roller portion of a conventional thermal transfer printer, and FIG. 2 is a simplified configuration diagram showing an embodiment of a thermal transfer printer according to the present invention.
FIG. 3 is an enlarged view of the peeled part between the ink sheet and the recording paper in the same embodiment. 1... Ink sheet 2... Recording paper 3... Recording head 4... Platen roller 10... Guide plate 11... Window 14... Cam 15... Brush
81, 82...Sensor applicant Kiyoshi Torii

Claims (1)

[Claims] In a system where an ink sheet and a single sheet of recording paper are pressed into contact between a recording head and a platen roller, and each line is sequentially recorded by thermal transfer while being fed in steps by the rotation of the platen roller, after the transfer means for transporting the ink sheet and the recording paper by at least the length of the recording paper; a means for detecting when the leading edge of the recording paper has reached the peeling position; ff: A thermal transfer printer characterized by being provided with a means for forcibly pulling the ink sheet and recording paper by a constant force by the length of ff.