JPH0611570B2 - Thermal transfer recording device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper holding function of a thermal transfer recording device in which an image receiving paper is wound around a drum and recording is performed by a recording head such as a thermal head.

2. Description of the Related Art In recent years, there has been an increasing demand for an apparatus for color hard copy of a display such as a CRT. Especially, an apparatus for sequentially recording on a receiving paper using a color transfer paper as a system requiring no maintenance. Is required.

The paper holding function of the conventional thermal transfer recording apparatus will be described below.

1 and 2 are schematic views of a conventional thermal transfer recording apparatus. Reference numeral 1 is an image receiving paper, the front end of which is held in pressure contact with a drum 3 by a paper holder 2 and wound. The paper holder 2 is normally urged by a spring member (not shown) in the substantially central direction of the drum 3. Reference numeral 9 denotes a rotatable pressing roller which is constantly urged by the spring (not shown) toward the drum 3 in a substantially central direction. Reference numeral 4 denotes a color transfer paper, on which cyan (C), yellow (Y), and magenta (M) inks are sequentially applied as shown in FIG. A plurality of heating elements 5 are arranged linearly (not shown).
It is a thermal head composed of. 7 and 8 are image receiving paper 1
Is an image receiving paper guide member for guiding the image receiving paper 1 when inserting or ejecting. The drum 3, which holds the front end of the image receiving paper 1 by the paper holder 2, rotates in the direction of arrow A and stops at the recording start position. Next, the thermal head 5 is used so that the ink-coated surface of the color transfer paper 4 contacts the image receiving paper 1.
Also, the image receiving paper 1 is sandwiched and pressed against the drum 3. After press contact, the drum 3 rotates in the direction of arrow A, and at the same time, the heating element 6 of the thermal head 5 generates heat in response to the signal, and the heat causes the ink applied to the color transfer paper 4 to melt or sublime.
It is transferred and recorded on the image receiving paper 1. When the recording of the first color (cyan) is completed, the thermal head 5 is separated from the drum 3, during which the drum 3 rotates in the direction of arrow A and stops at the same start position as the recording start position of the first color. Transfer paper 4 is indicated by arrow B until the second color (yellow) reaches the recording position.
It is wound in the direction. (The winding mechanism is not shown.) Again, the thermal head 5 presses the color transfer paper 4 and the image receiving paper 1 against each other in a sandwiched manner, and when the drum 3 rotates, the heating element 6 generates heat in response to the signal so that the first color is overlaid. The second color ink is transferred and recorded on the image receiving paper 1 by melting or sublimation. Similarly, the third color (magenta) is transferred and recorded. When recording is completed, the thermal head 5 separates from the drum 3,
The substantially rear end of the image receiving paper 1 is rotated in the arrow A direction until the position is pressed by the pressing roller 9, the drum 3 is rotated in the rear arrow C direction, and the rear end of the image receiving paper 1 is moved to the image receiving paper guide member 7. , 8, the image-receiving paper 1 for which recording has been completed is ejected, and the paper holder 2
The image receiving paper 1 can be taken out by releasing (the release mechanism is not shown).

However, in this conventional configuration, as shown in FIG. 1, the image receiving sheet 1 is released from the pressing force of the pressing roller 9 while the ink of the color transfer sheet 4 is being transferred and recorded on the image receiving sheet 1.
Therefore, since the rear end of the image receiving paper 1 becomes free, heat distribution in the thermal head 5, non-uniformity of the ink amount transferred by the thermal head 5 in the axial direction of the drum 3, The position of the image receiving paper 1 with respect to the drum 3 with respect to the axial direction of the drum 3 becomes unstable due to the non-uniformity of the pressing force with respect to the drum 3 with respect to the axial direction, and therefore the position of the drum 3 for transferring three colors differs with respect to the axial direction. It was a cause of color shift.

An object of the present invention is to prevent the trailing edge of the image receiving paper from being free from the drum during recording, and thus to eliminate color misregistration when transfer recording is performed by superposing three colors. is there.

The thermal transfer recording apparatus of the present invention comprises a drum around which an image receiving paper is wound, an image receiving paper guide member provided near the drum for guiding the image receiving paper to the drum, and a guide for the image receiving paper guide member. A paper holder for holding the front end of the received image receiving paper on the drum, a transfer paper coated with ink, and the image receiving paper are pressed and nipped between the drums, and recording is performed on the image receiving paper while rotating the drum. When recording on the image receiving paper by the recording head and the recording head is completed, a substantially rear end of the image receiving paper is pressed and sandwiched by the drum between the recording head and the image receiving paper guide member, and the image receiving paper is received. A rotatable roller located near a guide path of the image receiving sheet to the drum by the guide member, and when the image receiving sheet is ejected, the drum rotates in a direction opposite to the recording direction, and the roller receives the image receiving sheet. paper Substantially rear end is that is discharged by being guided by the receiving paper guide member.

Description of Embodiments FIG. 4 shows the configuration of an embodiment of the present invention. Reference numeral 11 denotes an image receiving paper, the front end of which is pressed against a drum 13 by a paper holder 12 and wound. The paper holder 12 is normally biased by a spring member (not shown) in the substantially central direction of the drum 13.
Reference numeral 19 denotes a rotatable pressing roller, which is constantly urged by a spring member (not shown) in the substantially central direction of the drum 13. 14
Is color transfer paper, and as shown in FIG. 3, cyan (C),
Yellow (Y) and magenta (M) inks are sequentially applied. Reference numeral 15 is a thermal head composed of a plurality of heating elements 16 arranged linearly. Reference numerals 17 and 18 denote image receiving paper guide members that guide the image receiving paper 11 when the image receiving paper 11 is inserted or ejected.

The pressing roller 19 is positioned so as to press the substantially rear end of the image receiving paper 11 to the drum 13 when the transfer recording of each color of the color transfer paper 14 is completed on the image receiving paper 11 by the thermal head 15.
Moreover, it is arranged at a position where the substantially rear end of the image receiving paper 11 is guided to the image receiving paper guide members 17 and 18.

The drum 13 holding the front end of the image receiving paper 11 rotates in the direction of arrow A and stops at the recording start position. Next, the color transfer paper 14 and the image receiving paper 11 are moved by the thermal head 15 so that the ink coated surface of the color transfer paper 14 contacts the image receiving paper 11.
Is clamped and pressed against the drum 13. After the pressure contact, the drum 13 rotates in the direction of arrow A, and at the same time, the heating element 16 of the thermal head 15 generates heat according to the signal, and the heat applied melts or sublimes the ink applied to the color transfer paper 14 and the image receiving paper 11 Will be transcribed and recorded. When the recording of the first color (cyan) is completed, the thermal head 15 is separated from the drum 13. At this time, the image receiving paper 11 has its substantially rear end pressed against the drum 13 by the pressing roller 19. Next, the drum 13 rotates in the direction of arrow A, stops at the same start position as the recording start position for the first color, and the color transfer paper 14 becomes the second color (yellow).
Is taken up in the direction of arrow B until is at the recording position. (The winding mechanism is not shown.) Again, the thermal head 15 presses the color transfer paper 14 and the image receiving paper 11 against each other while sandwiching them, and when the drum 13 rotates, heat is generated by the heating element 16 in response to a signal.
The second color ink is transferred and recorded on the image receiving paper 11 by being melted or sublimated so as to overlap with the color. Similarly, the third color (magenta) is transferred and recorded. When the recording is completed, the thermal head 15 is separated from the drum 13, the drum 13 is rotated in the direction opposite to the rear arrow A, the rear end of the image receiving paper 11 is guided between the image receiving paper guide members 17 and 18, and the recording is completed. The image receiving paper 11 is discharged, and the image receiving paper 11 can be taken out by releasing the paper holder 12 (the release mechanism is not shown).

As shown in FIG. 4, when the ink of the color transfer paper 4 is transferred and recorded on the image receiving paper 11, the back of the image receiving paper 11 pressed by the thermal head 15 is pressed by the pressing roller 19 until the recording transfer of each color is completed. It is constantly pressed by the drum 13.
Therefore, due to the heat distribution of the thermal head 15, the non-uniformity of the amount of ink transferred by the thermal head 15 in the axial direction with respect to the drum 13, the non-uniformity of the pressing force of the thermal head 15 with respect to the drum 13 in the axial direction, etc. The position of the paper 11 with respect to the axial direction of the drum 13 does not become unstable. Therefore, even if the three colors are sequentially transferred, the color is not shifted in the axial direction of the drum 13, a good image quality is obtained, and the effect is great.

When the recording is completed, the pressing roller 19 causes the image receiving paper 11
The image receiving paper 11 is at a position where the rear end of the image receiving paper 11 is pressed.
Since the substantially rear end of is disposed at a position to guide the image receiving paper guide members 17 and 18, and the thermal head 15 is disposed in the vicinity thereof, it can serve as both a discharge roller and a pressing roller, and its economic effect is great. It is a thing.

Further, since the rotation angle of the drum 13 from holding the image receiving paper 11 by the paper holder 2 to the start of recording and the rotation angle of the drum 13 from the end of recording to the start of discharge can be small, the recording time as a whole can be reduced. Can be shortened, and the effect is very large.

EFFECTS OF THE INVENTION As described above, according to the present invention, the rear of the image receiving sheet pressed against the drum by the thermal head is pressed by the pressing roller, so that the position of the image receiving sheet with respect to the drum in the axial direction of the drum is unstable. Therefore, even if the three colors are sequentially transferred, the color does not shift in the axial direction of the drum, and good image quality can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic view of a conventional thermal transfer recording apparatus at the time of recording, FIG. 2 is a schematic view of the apparatus at the time of discharging an image receiving paper, and FIG.
FIG. 4 is a plan view of a color transfer paper used in the apparatus, and FIG. 4 is a schematic view of the heat-sensitive transfer recording apparatus according to the embodiment of the present invention at the time of recording (a state where recording is completed). 1, 11 ... Image receiving paper, 2, 12 ... Paper holder, 3, 13
...... Drums, 4,14 …… Color transfer paper, 5,15 ……
Thermal head, 9, 19 '... Pressing roller.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Keiko Minamino 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) Reference JP 58-142887 (JP, A) (JP, U)

Claims (1)

[Claims] 1. A drum around which an image receiving paper is wound, an image receiving paper guide member provided near the drum for guiding the image receiving paper to the drum, and a front end of the image receiving paper guided by the image receiving paper guide member. A paper holder for holding the sheet on the drum, a recording head for holding the transfer paper coated with the ink and the image receiving sheet on the drum under pressure, and performing recording on the image receiving sheet while rotating the drum; When the recording on the image receiving paper by means of the above is completed, the substantially rear end of the image receiving paper is pressed and nipped by the drum between the recording head and the image receiving paper guide member, and the image receiving paper guide member moves the image on the drum. A rotatable roller located near the guide path of the image receiving paper, the drum rotates in a direction opposite to that at the time of recording when the image receiving paper is discharged, and the substantially rear end of the image receiving paper is moved by the roller. Receiving paper guide Thermal transfer recording apparatus characterized by being discharged while being guided by the wood.