JPS6099659A - Multicolor recorder - Google Patents

Abstract

PURPOSE:To minimize the color deviation of a recording image by repeating a printing several times under controlling the printing position based on a detection signal of a marking which is attached onto a recording paper at a specified interval. CONSTITUTION:A marking is printed at a specified interval with a thermal head 20 on a margin besides the printing area. Images in all colors of yellow, magenta and cyan are printed synchronizing a pulse generated detecting the marking printed on a recording paper 25 with a position detecting means 40. Thus, the relative positional accuracy can be elevated in the printing of each color on the recording paper.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a multicolor recording device that prints overlappingly multiple times to obtain a multicolor recorded image. Regarding Y, in particular,
The present invention relates to a multicolor recording device using heat-melting ink or heat-melting ink.

Conventional configuration and its problems When performing multicolor recording using this type of recording device,
There is a problem in that the color shift of the image occurs over a considerable area, making it difficult to obtain a recorded image with little color shift. This problem will be explained below by taking as an example a thermal transfer multicolor recording device using heat-melting V1 ink.

FIG. 1 shows a (1111) view of a conventional thermal transfer multicolor recording device, where 1 is a thermal head and a heating element 11 is shown.
are arranged on a plurality of lines perpendicular to the drawing, and can be moved to the position indicated by the dotted line 1A.

2I'i An ink sheet coated with heat-melting ink, 3 a take-up roll for the ink sheet 2, 4 a supply roll for the ink sheet 2, 6 a recording paper, and 6 an I' of the recording paper 6! A supply roll 7 is a platen roller that brings the ink sheet 2 and the recording paper 6 into close contact with each other and transfers it to the Maruhenote 1 by pressing, and 8 is a suppression roller that presses the recording paper 6 against the platen roller 7. The operation of the conventional recording apparatus configured as described above will be described next.

The recording principle of the thermal transfer multicolor recording device is simple, as shown in FIG. In response to this, the heating element 11 of the thermal head 1 is made to generate heat, the ink sheet 2 is heated, and the heat-melting ink applied to the ink sheet 2 is melted and transferred onto the recording paper 6. A plan view of the ink sheet 2 is shown in FIG. Heat-melting ink is applied in each color: Y is yellow, M is magenta, and C is cyan. . Therefore, the ink sheet 2 is run only in one direction as shown by arrow A, and the recording paper 6 is moved in the direction of the arrow during printing, and after each color print is completed, the original ('+' is replaced with When returning the recording paper 5 to the original powdered candy before printing, the thermal head 1 is moved to the position indicated by the dotted line 1A, and only the recording paper is removed by the platen roller 7 and the suppression roller 8. With the recording paper 5 sandwiched in, it is rewound to its original position before printing.In this way, the heat-melting ink of each color is repeatedly superimposed from the ink sheet 2 onto the recording paper 6 for transfer printing. In such recording devices, alignment between the first printed color and the later printed color is an important problem, and this misalignment is especially called color blurring.Causes of color misalignmentUS, Based on the accuracy of position reproducibility when the recording paper 5 is moved back and forth,
However, it is thick. In recent years, there has been a strong demand for high-density, high-quality multicolor images in thermal transfer multicolor recording devices.
It is necessary to reduce color shift as much as possible. However, in the case of the conventional example shown in FIG. 1, the recording paper 5 is caused to travel by frictional force, and slips are likely to occur between the recording paper 6 and the platen roller 7. In particular, move the thermal head 1 to the position indicated by the dotted line 1A, and move the print Mi+ to the position jtL -
When returning it with (bamboo), the pressure roller 8 that presses the recording paper 5 against the platen 7 breaks down, and the frictional force U between the recording paper 5 and the platen roller 7 is very weak, causing slipping. Therefore, due to these slips, etc., uneven feeding of the recording paper 5 occurs, making it difficult to perform highly accurate positioning when the recording paper 5 is moved back and forth, and over a considerable range. Color shifts occurred throughout the process, making it difficult to obtain high-density, high-quality multicolor images.

OBJECTS OF THE INVENTION The present invention attempts to solve the problems of the prior art as described above, and aims to suppress color shift in recorded images to an extremely small level.

Structure of the Invention The present invention provides a recording paper driving means for reciprocating the recording paper;
a recording device that prints on the recording paper in a plurality of overlapping manners; a marking device that applies position detection markings to the recording paper -1-;
f4-! jL fC? - Ki7ri' % coating - J-Z+
(1'r, Irj l/Q output means, i1
To the IJ recorder? li, - again d, multiple markings! (fixed)
The markings applied to the recording paper 1 at intervals of ")" and "-)" are detected by the position detecting means, and the printing f+ device 4 on the recording paper is controlled based on the detection signal of the markings. By repeatedly printing tν several times using a recording means, the recording of each printing and the printing position on the paper are aligned, and color shift is attempted to be minimized. .

DESCRIPTION OF EMBODIMENTS FIG. 3 shows a schematic configuration of a first embodiment of the present invention. 20
is a thermal head, which has a plurality of heating elements 214 arranged in a line in a direction perpendicular to the drawing, and can be moved up to the position indicated by the dotted line 2A. 22 ((Ink sheet 1 coated with J1% meltable ink, 23 is Ink sheet 2
2 is a take-up reel of 24 pieces, a supply roll for the ink sheet 22, and a platen roller 27, which are connected to each other by a motor 32 by a one-way clutch. The ink sheet 22 and the recording paper 25 are brought into close contact with each other and are pressed against the thermal pad 1-20. Reference numeral 10 denotes a printing circuit that drives the thermal head in accordance with a recording signal to perform thermal transfer recording. Reference numeral 28 denotes a suppression roller that allows the recording paper 25 to be wound around the platen roller 27.
Thermal head 20. (Nkusi 1-22.

Ink sheet take-up reel 23. Ink sheet supply reel 24. Platen roller 27. W pressure roller 28. The printing circuit 10 constitutes a recording means, and can perform recording by causing a heating element 21 of a thermal head 2° to generate heat in response to a recording signal, melting and transferring the heat-melting ink of an ink sheet onto a recording paper 26. . 30 is a capstan, 4o is a pinch roller, the recording paper 26 is sandwiched between the capstan 30 and the pinch roller 31, and the capstan 30 is rotated by a motor 32 to cause the recording paper 25 to travel. This constitutes a recording paper driving means. The thermal head 2Q is a marking means that prints one or more markings on the recording paper 26 at regular intervals in the running direction of the recording paper 260 in order to detect the position of the recording paper 25. It also serves as FIG. 6 shows the first embodiment of the present invention.
This shows the state of a recorded image when recording is performed according to the embodiment, and as shown in the figure, a marking M can be printed in the margin of the recording paper 26 other than the printing area E.

FIG. 6 shows a plan view of the ink sheet 22 according to the first embodiment of the present invention, and as shown in the figure, Y
is yellow, M is magenta, and C is cyan, and a part of the edge of the sheet is coated with BL.
It is coated with black heat-melting ink shown in . 1
- Using the area coated with the black thermofusible ink indicated by BL, markings M as shown in FIG. 6 are printed by the thermal head 20.

4o is a position detecting means which generates a Noculus signal when it detects a marking M printed on the recording paper 26 by the therma/l head 20 as shown in FIG. 6o is a printing timing control means, which prints the print timing in synchronization with the /clueless signal of the position detection means.
Reference numeral 26 is a supply roll for the recording paper 25, which controls the printing circuit 1o so as to start printing at the same time.

Next, the operation of the first embodiment of the present invention will be explained in more detail. FIG. 4 shows a timing chart of the operation of the first embodiment of the present invention.

When a start button (not shown) is pressed, the device starts operating, the motor 32 rotates at a predetermined speed, and the pinch roller
31 and the recording paper 26 sandwiched by the capstan 3o are run in the direction of arrow B, and by the thermal head 2o,
As shown in FIG. 6, markings M are started to be printed in the margins other than the printing area E, and a plurality of markings are printed at predetermined intervals (FIG. 6). At this time, since the platen roller is connected to the motor 32 via a one-way clutch, the platen roller is in a completely free state and rotates while being pulled by the recording paper 26. At the same time, the position detection means 40 starts operating, and the marking M printed by the thermal head 21 travels a distance t shown in FIG. 3, and as shown in FIGS.
・When printing. At a time point delayed by 11 degrees from the point, the position 1iji' detection unit 4 degrees is reached, and the position detecting means 40) detects the marking M and generates a pulse. The print timing control means 60 is based on this position detection means 4.
o is generated and the printing circuit Jo is activated so that the thermal head 2o starts printing the yellow image in synchronization with the pulse.
i system i! # (Figure 6C) and the first marking M
After detecting , a predetermined printing is performed at a size at which the next marking M is detected, and each time a marking M is detected, this operation is sequentially repeated 7 to complete the first printing of the yellow image. Further, the ink sheet 22 is sequentially wound up by the ink sheet winding roll 2311ζ. Next, the thermal head 20 is moved to the position indicated by the dotted line 2A, and the motor 32 is reversed. At this time, the ink sheet 22 is stopped without running. The capstan 3o and the pinch a-no 31 rotate in the opposite direction,
The recording paper 26 is run in the direction opposite to arrow B. At this time,
The platen roller 27 is connected to the motor 32 via a one-way clutch, and rotates so as to run the recording paper 26 in the direction opposite to arrow B. The speed of the outer circumference of the platen roller is lower than the running speed of the recording paper 250. wazu power・
Due to the high speed, the recording paper 26, which is sandwiched between the suppression roller 2'8 and the platen roller 27, runs in the opposite direction of the arrow B while being constantly under tension. The suppression force between the suppression port and No. 28 is weak, so this platen roller 2 is always
The recording paper 26 slips between the capstan 3o and the pinch roller 31, and does not slip at all between the capstan 3o and the pinch roller 31. It is determined by the rotation speed. After the recording paper 25 is run to the position before printing the marking M, the motor 32 is rotated normally again to run the recording paper 25 in the direction of arrow B.

At the same time, the position detection means 4o starts operating and generates a pulse when it detects the marking M, just like when printing a yellow image, and the timing control means 50 controls the printing circuit 10 by controlling π11 and r1. Seal IVI' detection means 40
0 starts printing a magenta image by the thermal head 20 in synchronization with the generated pulse, and after detecting the marking M, IIFi performs a predetermined printing at the distance to detect the next marking M, and prints the magenta image. Finish printing. The cyan image is printed in exactly the same way as the magenta image, in which the position detection means 40 detects and generates the marking M, and is sequentially performed in synchronization with the zoko pulse. Therefore, as explained above, when double-image recording is performed using the multicolor recording apparatus according to the first embodiment of the present invention, all colors of yellow, magenta, and cyan can be
! Since the position detection means 40 detects the marking M printed on the recording paper 25 and prints the ji image in synchronization with the generated pulse, the relative positional accuracy of printing each color on the recording paper becomes extremely high, and the color This means that there is almost no noise J′1, and a high-resolution, high-quality image can be obtained. In the first embodiment of the present invention, the position detecting means 40 is arranged at a place where the recording paper 26 is wrapped around the capstan 30.
Therefore, 1;I is IJ paper 25/koruntari, ]ll,
Make sure that the capstan 3o and The pinch roller 31 runs in a state where it is pulled out from the pinched state by the thermal head 20 and platen roller 27, and tension is always at work during printing. There is no slack or vibration. Therefore, the position detection means 40
30, highly accurate dog detection can be performed as in the first embodiment, no matter where the thermal head is placed in the traveling path of the recording paper 260 with a length of 20 inches.

FIG. 6 shows a second embodiment of the invention. 6
0 is a recording paper drive control means, and the position detection means 40 is
The motor 32 is controlled based on the pulses generated by detecting the markings printed by the thermal head 20, and the other configurations are exactly the same as the first embodiment of the present invention. In the first embodiment of the present invention, the position detection means 40 or the marking 6 (.
+ L-k II, BLACK (-) The printing start rhythm is made to coincide with the generated pulse, but in the second embodiment of the present invention shown in FIG. 7, the position detection means Based on the pulse generated by
The speed of the motor 32 is controlled by the motor 60. In other words, is the running speed of the recording paper 25 during printing for each color detected by marking? The motor 3 is operated by the recording paper drive means 6o so that the time at mark 1 [the marking is to be shifted, and the next marking is detected after detecting the marking] is constant.
In other words, the number of insects traveling on the recording paper 25 is controlled. At this time, the printing circuit 10 causes the thermal head 20 to perform transfer printing at a constant printing speed.

The relative positional accuracy of the magenta and cyan images on the recording paper 25 is extremely high, and even when using the apparatus according to the second embodiment of the present invention, color shift occurs as in the first embodiment of the present invention. This means that it is possible to obtain a high-density, high-quality recorded image with less lag.

As described above, the present invention includes a recording paper driving means for reciprocating a recording paper, a recording means for printing on the recording paper by overlapping it a plurality of times, and a recording means for printing by overlapping the recording paper a plurality of times on the recording paper. A recording means for printing, a marking means for applying a marking for position detection on the recording paper, and a position detection means for detecting the marking given on the recording paper, and the recording paper is detected by the marking means.
(2) attaching one or more markings at predetermined intervals;
The position detecting means detects a marking given on the recording paper, and the marking is applied to the recording means while controlling the printing position on the recording paper based on the detection signal of the marking.
: By repeating printing multiple times, the printing position on the recording paper is aligned for each printing time. When this is done, all printed images of each color are printed at the same position on the recording paper with high positional accuracy based on the detection signal that detects the same marking. [Quality] 2. It is possible to see 11 images of recorded images.

[Brief explanation of drawings]

FIG. 1 is a principle diagram of a conventional multicolor recording device, FIG. 2 is a plan view of an ink sheet used in the same device, and FIG. 3 is a principle diagram of a multicolor recording device according to a first embodiment of the present invention. , Fig. 4 is a timing chart for explaining the device, Fig. 6 is a diagram showing an image on recording paper when recording is performed using the same device, and Fig. 6 is an example of an ink sheet used in the device. The plan view shown in FIG. 7 is a principle diagram of a multicolor recording apparatus according to a second embodiment of the present invention. 2o...Thermal head, 21...Heating element, 22...Ink sheet, 23...
Ink sheet take-up roll, 24... Ink sheet take-up roll, 25... Recording paper, 26...
...Recording paper supply roll, 27...Platen roller, 28...Press roller, 30...
Capstan, 31...Pinch roller-132.
...Motor, 10...Print circuit, 4o
60. Print timing control means, 60. Recording paper, drive control means. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3? 6 Figure 4 - First line b Figure 5 Figure 6 L Figure 7

Claims (1)

Scope of Claims: (1) A recording paper drive means for reciprocating the recording paper in a recording direction and a reversal direction opposite to the recording direction; a recording means for printing overlappingly a plurality of times on the recording paper; a marking means for applying rigid force to one or more position detection markings on the recording paper at predetermined intervals; and a position for detecting the rigidly applied markings on the recording paper. A multicolor recording device comprising a detection means. (2) The first aspect of the present invention further comprises a print timing control means for controlling the printing timing by controlling the recording means based on the detection signal of the marking on the recording paper detected by the position detection means. The multicolor recording device described in Section 1. (3) 1W on the recording paper detected by the position detection means
The method according to claim 1, further comprising a recording paper drive control means for controlling the recording paper drive means to control the position of the recording paper based on the detection signal of the marking obtained by te. Color recording device. (4) Claims 1, 2, or 3 in which the recording head and the marking means are constituted by the same recording head.
The multicolor recording device described in Section 1. (6) The recording paper driving means causes the recording paper to run in the recording direction, and the marking means places one or more markings on the recording paper at predetermined intervals, and at the same time, the position detection means causes the recording paper to move on the recording paper. A rigid marking is detected, the recording means is controlled by the printing timing control means, the first printing is started in synchronization with the detection signal of the marking detected by the position detection means, and the next detection is performed from the detected marking. 3. The multicolor recording device according to claim 2, wherein the first printing is completed by sequentially performing predetermined printing in the marking grooves. (6) After the recording paper is driven by the recording paper driving means in the reversing direction for a predetermined distance to the position before the first printing, the recording paper is run again in the recording direction, and the position detection means is used to record the recording paper. One or more markings made on the paper are detected, the recording means is controlled by the printing timing control means, and printing is started in synchronization with the detection signal of the markings detected by the position detection means. The multicolor recording device according to claim 3, wherein the multicolor recording device performs second and subsequent printing by sequentially performing predetermined printing from the detected marking to the next detected marking. (7) At least a pinch roller and a capstan constitute a recording paper driving means, and the pinch roller and the capstan pinch and run the recording paper, and the recording paper is moved between the recording means and the recording paper driving means. 2. The multicolor recording apparatus according to claim 1, further comprising position detecting means arranged on the recording paper travel path. (8) The multicolor recording apparatus according to claim 7, wherein the position detection means is arranged on the recording paper travel path near the capstan.