JPS5877366A - Color printer - Google Patents

Abstract

PURPOSE:To attain miniaturization and elimination of maintenance, and to improve the reliability, by converting picture information on an objective to be read into a picture signal different in color and driving a thermal line dot head in response to the picture sgnal different in color. CONSTITUTION:An original loaded on an original tray 2 is carried with a feeding roller 4 and scanned with a contact sensor scanner 5. The scanner 5 illuminates different colors at each scanning through a plurality of reciprocating carryings of the original, and picture signals corresponding to the complementary color to the illuminated color with the reflected right from the original can be obtained. According to the picture signals, an ink of a color to be corresponded to a thermal transfer paper 17 is superimposingly transferred to a transfer objective P with a thermal line dot head 16 using a thermal resistor in response to the picture signals.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a color printing device using a thermal transfer printing method.

Conventionally, there is a Fi1 electronic copying type color PPC as a color printing device, but it is large and expensive, and the cost of printed matter is also high.It is difficult to maintain and there is no one with high spindle quality.
Therefore, maintenance-free, low-cost thermal printing, which is widely used by Kashinka, is the solution.

Moreover, the transfer printing method has made it possible to print in color on plain paper, which was a disadvantage of thermal printing.
Nine-color printing using that method! Electricity is required.

This invention was made in view of the above circumstances.

The purpose is to provide a color printing device that is smaller, requires less maintenance, has improved flexibility, and can reduce costs.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 schematically shows the internal mechanism.A document mounting table 2 is fixed to the upper surface of the main body 1. FIG.

Then, the original placed on this original placing table 2 before the war and with one end inserted into the original insertion slot 3 is sent! 70-
24 in the direction of arrow a, the contact sensor scanner unit 5 scans the contact sensor.

By repeatedly transporting the document back and forth several times, this dense/@-h scan scanner section 5 emits a different color each time it is scanned, and uses the reflected light from the document to generate a signal corresponding to the complementary color of the emitted color. is obtained. Nine originals are ejected from an original ejection port 6 corresponding to the contact sensor scanner section 5. A detector 1 for detecting the leading edge and trailing edge of the original document is provided near the document insertion port 3, and a detector 8 for detecting the leading edge and trailing edge of the document is also provided near the document ejection port 6. is provided. The detector 1.8 is a well-known detector composed of, for example, a light emitting element and a light receiving element. The feed roller 4 is rotated by a pulse motor 9 provided in the main body 1, and the pulse motor 9 is driven in forward and reverse directions to move the arrows c and d.
It is designed to rotate in the direction. Note that the rotation of the feed roller 4 causes the document to reciprocate in the directions of arrows a and b.

On the other hand, the sheets P are stored in a paper feed cassette 10, are fed out one by one by a feeding roller 11, and are conveyed to a stacking drum 13 through a guide path 12. This winding drum 13 rotates in the direction of the arrow shown in the figure, and the paper P is first brought into close contact with the tension roller 14, and then the leading edge of the paper P is clipped to the winding roller 13 by the grip 15 and transferred to the transfer section. The above-mentioned grip 1 is for conveyance.
5 is adapted to be pushed down onto the winding drum 13 by a mechanism (not shown), and one end of the paper sheet P is held down at several locations by presser claws (not shown). The circumference of the winding drum 13 is larger than the length of the paper P. The free paper P is conveyed to the transfer section, and the ink on the transfer paper 11 is transferred by the action of the thermal head 160. It looks like this. And 1. The winding drum 13 is rotated until further ink is transferred, and the transfer is performed in the same manner. Thereafter, the sheet P on the first take-up drum AJj is separated by the action of the separating claw 18 and is discharged onto the sheet discharge tray 19. The separation claws 18 are provided to correspond to the gaps between the presser claws of the grip 15. The thermal head 16 is moved to the winding drum 1 by the action of the solenoid 320.
It becomes steeper from 3 onwards. A detector 2o for detecting the conveyance of the paper P is provided near the guide path 12, and the detector 2o is composed of, for example, a light emitting element and a light receiving element. ), the gripper 15 is driven by the solenoid 21.

The separating claw 18 is configured to be driven by a solenoid 22. The winding drum 13 is rotated by a pulse motor 23.
A timing disk 24 is provided on the rotation shaft 3.

One winding drum I is placed near the winding drum 13 by detecting the slit in the timing disk 24.
A detector 25 consisting of a light emitting element and a light receiving element is provided to detect the rotational position of J.

The transfer paper 11 is, for example, a condenser paper of several micrometers, and as shown in FIG. The back & 6 ink layers are repeatedly provided.

Then, the transfer paper 11 wound on the reel 26 is transferred to the roller 21. Feed roller 28. The winding reel 3 is guided to the take-up reel 30 via the roller 29.
It is designed to be wound up by o. Above roller 2
In the vicinity of 7, transfer paper 11 is placed in accordance with the transmission of the transfer paper 11.
Detector 3 that detects whether the color is zero, for example black
1 is provided, and this detector is composed of a 5xFi light emitting element and a light receiving element. Let's run.

The expenditure roller 11 is rotated by a pulse motor 33, and is rotated by a feed roller 28 and a winding reel 5olri pulse motor 34. .

3 and 4 show the contact (line) sensor scanner section 5, in which several sensors/
A large 1728-dot line head sensor section 42 and a drive control section 43 are provided, to which an external input/output lead wire 44 is connected. The line dot sensor section 42 is configured to change the scanning direction when the document is moving forward or backward.

Light from the LED array 45 is irradiated onto the document through the protective glass 46, and the reflected light is guided to the SELFOC lens 41 through the protective glass 46.
The reflected light is focused and travels for 1 line, i.e. 172
The light is guided to eight light receiving elements 48, and is converted into an electrical signal by the light receiving element section 48. The LED array 45 includes red light emitting LEDs 49. ..., green light emitting L
EDso, . . . , blue light-emitting LEDs 51°, . . . are provided in sufficient number to illuminate each line. The document contacting surface of the protective glass 46 is made convex, and both ends are low, making it easy to comb one sheet.

FIG. 5 shows the main part of the drive circuit of the LED array section 45. By switching the switches 61, 6jl, 65 in response to a control signal from a control section (not shown), the power supply voltage is applied to each of the light emitting LEDs 49, . . . go,...,51.
It is designed to supply... Each of the above light emitting LEDs
451. −.

50,...,51. -Resistor 64 for balancing the light amount for each color.・Axes are connected. Also, each light emitting L
ED and resistance64. . . . are connected in common to limiting resistors 6J and 4 when all the light-emitting LEDs are turned on.

6 to 8 show the thermal head 16, in which several tens/- of heating resistors 72 are arranged in a line shape for 1728 dots on a ceramic substrate 71.
3 is provided, and the heating resistor 72 is configured to be driven by a drive control section 75 in response to a signal from a lead section 74. As shown in FIG. 7, the heat generating concentration 73 includes a glaze layer 16 provided on a ceramic substrate 71, and a heat generating resistor 72 on the glaze layer 76. electrode 77
．． 77 and a protective film 78 are sequentially laminated. For example, in the transfer process of the thermal head 16, as shown in FIGS. 9(a) to 9(c), the ink surface of the transfer paper 17 and the paper P are overlapped, and the ink surface of the transfer paper 17 is By heating with the heating resistor 12, only the heated ink surface is separated and transferred onto the paper P.

FIG. 10 shows the electrical circuit of the thermal head 16.1. That is, the shift register 91 is a 1728-bit register to which serial print data and clock pulses are supplied from a control circuit (not shown).
- It is called PP circuit)! II, 91.・-V
It is composed of C. For example, the D-FF circuit 91
．． The print data crab is supplied to the data input terminal of the other D.
-The data input terminal of the FF circuit 91t... is connected to the D-
The set output of the FF circuit is supplied, and the D-FF circuit 911
A clock pulse is supplied to each clock pulse input terminal of *#'*... The output of the shift register 91, that is, the set output of the D-FF circuit 913... is a latch circuit. 920 set input end 116
-Mio P/r%Peng・Ri肂聂诂O! The second set input terminal is supplied with a seven-bit signal from the control circuit, and the clock pulse input terminal is supplied with a latch signal from the control circuit. The latch circuit 92 is a left register 91
It latches the contents of, and is composed of nine, for example, 1728 OFF circuits.

The output of the latch circuit 92, that is, the FF circuit 923.・・・
The set output is supplied to the set input terminal of the latch circuit 930, the reset input terminal of this latch circuit 93 is supplied with the reset signal from the control circuit, and the clock pulse input terminal is supplied with the latch signal from the control circuit. Supplied. The latch circuit 93 latches the contents of the latch circuit 92, and includes, for example, 1728 FF-paths 931.
* Consists of 931 m "". The outputs of the latch circuit 93, ie, the nine sets of FF circuits jlj, , -', are sent to an AND circuit 94. .

941. ... are supplied to the first input terminals of these AND circuits 94. ,... is connected to the second input terminal of the above F1i.
1 circuit 921. The set output of... is supplied, and the enable signal from the control circuit is supplied to the third input terminal. The above AND circuit 94. .

The output of ... is each 4A drive with inverter function.
915I,... These drivers 95
1.・- are respectively supplied with the logic '11 signal and the heating resistor 12.・It causes the shaft to generate heat.

FIG. 11 schematically shows the control circuit.

Said pulse motor 9.23.35. , t4, respectively.

III, #j, 90. Said solenoid 21, 12°32
Renoid dry A14.11 that energizes each
5.86. A cpuss that controls the entire system in response to reading signals from the contact sensor scanner unit 5, signals from the detectors F, g, and 20.11, and signals from the operating unit 81, and a ROM (ROM) in which a processing program is stored. Read only
Memory) consists of K such as 8g.

Next, in such a configuration, the copying operation will be explained with reference to the timing charts shown in FIGS. Insert one end into the document insertion slot 3, place it on the document table 2, and turn on the copy switch in the operation section 81.Then, the cpvsg starts feeding by driving the pulse motor 9 in the forward direction. By rotating the row 24 in the d direction and driving the pulse motor 33,
) Rotate the take-out roller 11.

As a result, the feed roller 4 rotates to cause the original parrot to look into the contact sensor scanner section 5, and the runaway roller 11 takes out one sheet of paper P from the paper feed cassette IO. Then, when the leading edge of the document faces the reading position of the close contact scanner unit 5.

The CPU 1& stops the rotation of the paper feed roller 4 by stopping the pulse motor 419. Nine.

When the paper P taken out by the take-out roller 41 is guided to the detector 20 by the guide path 12, the CPU &
& rotates the winding drum 13 by driving the pulse motor 23. Then, the paper P is transferred in close contact with the winding drum 13 by the winding drum 13 and the tight tension roller 14. Further, after a predetermined period of time has passed since the detector 20 detects the leading edge of the paper P, the CPU
By stopping the pulse motor 33, JtJi stops driving the extractor a-ra 11. Then, the paper Pd and the CPU 8g, which are tightly transferred to the winding drum 13, drive the solenoid driver 84 and grip 1! By activating i, its tip is attached to the winding drum 13 with the grip 15. (9) When the copying switch is turned on, the cpUaaFi pulse motor 34 is driven to rotate the feed roller 29 and take-up reel 30 and move the transfer paper 11. During this movement, the detector 31 detects the black part of the paper, and after detecting the leading edge of the black part, the paper is conveyed to the transfer section at a speed of 900 ms. The transfer paper 11 is stopped.

Then, the transport time for the leading edge of the paper P to be transported from the detector 20 to the transfer section has elapsed.

cpuss drives the pulse motor 9 in the forward direction and also drives the pulse motor 34. Then, the feed roller 4 rotates again.

Starting from the leading edge of the document, the contact sensor scanner unit 5 performs photoelectric conversion and supplies the document to the CPU 118. That is, total light emission L
ED49. ..., 50. By lighting up . Due to this.

The CPU ## drives the thermal head 16 in accordance with the output from the contact sensor scanner section 5, that is, a single signal (print data) for black. At this time, the feed roller 28 and the take-up reel 30 are rotated by the drive of the pulse motor 34, and the transfer paper 11 is also moved.

That is, serial print data from CPU ## is supplied to shift register 91. As a result, the left register 91 sequentially shifts the supplied print data 7 in accordance with the a clock pulse. Then, each time 1728 bits (for one line) of print data is supplied, the CPU
A latch signal from 8 is supplied to a latch circuit 92.

Then, the latch circuit 92 latches the contents of the left register 91. As a result, the current printed content and the previous printed content in the latch circuit 93 are AND circuit group '941.9
AND circuit 9 which was compared with 4m-... and printed this time
41. . . . holds true, and the AND circuit 94. ,-・
・Drives the driver circuit 951 corresponding to . As a result, driver circuit 95. ...Keand circuit 943
．． The heating resistor 72.・Printing is performed using −. ・Then, the latch circuit 93 is reset by the reset signal from CPU1#, and the AND circuit 94I@94. The gates of the driver circuits 951 . . . . . . . - is driven and heat generating resistor 12. ... generates a fever. Due to this heat generation, the corresponding black portion of the transfer paper 11 is transferred onto the paper P, resulting in dot printing.

A latch signal from CPUj& is then supplied to latch circuit 93. Then, the latch circuit 93 becomes the latch circuit 92.
Latch the contents of the latch. Thereafter, every time a latch signal is supplied from CPυ8a to the latch circuit 92, the heating resistor r corresponding to the current print content and the previous print content, which are latched by the latch circuit 92 in the same manner as described above, has a circular print width.
r, . . . generate heat, and printing is performed according to the image signal for black. In this way, when printing was performed last time and the heat generating resistor 12 is driven again this time, by shortening the heat generation time (1), the temperature change in heat generation (2) is prevented from becoming abnormally high. Then, by driving the thermal head 16, a nine-dot pattern is copied onto the paper P using the black portion of the transfer paper 1r in accordance with the image signal for the black color of the original. Then, after a predetermined period of time has passed since the trailing edge of the document passes the detector 1, that is, just before the trailing edge of the document passes the contact sensor scanner unit 5, the CPU 88 stops the pulse motor 9! 7. When the rotation of the feed roller 4 is stopped, the CPU #Jt stops the pulse motor 34, so that the transfer paper 17 is no longer transferred. Furthermore, at this time, the CPUgs drive the solenoid driver 86.

The solenoid 32 is energized and the thermal head IC is removed from the winding drum 13 to prevent the paper P on the first winding drum 13 from being torn by the thermal head 16.

Then, the leading edge of the paper P wound on the drum 13 again for several seconds corresponds to the transfer section again.

CPUJIJI rotates the feed roller 4 in the C direction by driving the pulse motor 9 in the opposite direction. As a result, the light is enhanced in the direction of the document tib. Next, the document is scanned by the contact sensor scanner unit 5 in order from the rear end in a scan direction opposite to the scan direction of the black portion, photoelectrically converted and supplied to the CPUJtJt.

In other words, #color light emitting LBD49. By lighting "", an image signal for magenta, which is a complementary color of green, is output. As a result, the CPU 88 drives the therma A, 11j according to the output from the contact sensor scanner section 5, that is, the image signal for magenta.At this time, the feed roller 28 and the take-up reel 30 are rotated by the drive of the pulse motor J4. The transfer paper 17 is also driven.

Then, using the black part of the transfer paper 17 and using the magenta part in the same way as the circle printing, +1ill information corresponding to magenta is printed in dots on the paper P, superimposed on the black dot print. Then, after a predetermined period of time has elapsed since the leading edge of the original passed the detector 8, and just before the leading edge of the original passes the contact sensor scanner section 5, the CPU && stops the pulse motor 9 to control the feed roller 4. Rotate.

Then, the nine sheets of paper P are wound again on the winding drum 13).
When the tip corresponds to the transfer part again.

CPUJIJI drives the pulse motor 9 in the forward direction to feed and rotate the cola 4 in the d direction. As a result, the original is conveyed in the direction of copying.

The original is photoelectrically converted by the contact sensor scanner unit 5 in order from the leading edge of the original and supplied to the CPUJ&.

That is, by lighting up the blue light-emitting LEDs, an image signal for yellow, which is a complementary color of blue, is output. Due to this.

The CPU && drives the thermal head 16 in accordance with the output from the contact sensor scanner section 5, that is, the image information signal for yellow. t Octopus and 1! , the transfer roller 28 and the take-up reel 30 are rotated by the drive of the rotation motor 34, and the transfer paper 11 is also moved.
Using the black part of , the yellow part is used to dot print the double-tube signal corresponding to yellow on the paper P in the same way as the nine printing.

Then, after a predetermined period of time has passed since the trailing edge of the document passes the detector 1, that is, just before the leading edge of the document passes the close-contact scanner section 5, the CPUIB stops the pulse motor 9 to rotate the feed roller 4. At the same time, the contact sensor scanner section 5 and the thermal head 16 are stopped.
stop the operation. Then, when the leading edge of the wound paper P on the first winding drum 13 corresponds to the transfer section again,
The CPUJtJt rotates the feed row 24 in the C direction by driving the pulse motor 9 in the opposite direction. As a result, the original is conveyed in the b direction. Next, the contact sensor scanner unit 5 scans the document from the rear end in a scan direction opposite to the scan direction for black, and the document is photoelectrically converted and supplied to the CPU 88 . That is, by lighting the red light-emitting LEDs 5J, . . . , an image signal for cyan, which is a complementary color of red, is output.

Due to this.

C, PU8JI is the thermal head 1 according to the output from the contact sensor scanner section 6, that is, the image quality signal for cyan.
6. Drive. At this time, the feed roller 28 and the winding roller 3 are driven by the pulse motor 34.
．． 0 rotates and the transfer paper 11 also moves. Therefore, similarly to the printing using the black portion of the transfer paper 12, the cyan portion is used to print dots of an image signal corresponding to cyan on the paper P.

Then, when the leading edge of the paper P wound up on the first winding drum 13 corresponds to the separating claw 111VC, the CPU 88 stops the solenoid driver 84 to stop the solenoid 2.
1 to release the grip 15 from holding the paper P. Also.

At this time, by driving the solenoid driver 85, the solenoid 22 is energized and the separating claw 1a is moved to the winding drum 1.
Closely related to 3. Due to this.

The nine sheets P attached to the winding drum 13 are separated from the winding drum 13 by a separating claw 18 and are discharged onto a paper discharge tray 19. Thereafter, when the rear edge of the document is detected by the detector 1, CPUJII# stops the pulse motor 9,
From this point on, the original for which color copying has been completed is placed on the original loading table 1.

As described above, the contact senna scanner unit 5 reads the original document repeatedly using different colorimetric methods, and the image on the colorimetric transfer paper is calculated based on the image density signal for the complementary color obtained for each S-print.
Since the printer prints on the paper P using a screwdriver, it can be done with an inexpensive and simple mechanism, and does not require complicated control.

This is a tonne that can improve reliability and eliminate maintenance.

In the above-mentioned embodiment, a case was described in which printing is performed using four colors of ink on the transfer paper, but the invention is not limited to this, and three or two colors can be used as necessary. Also,
The color order of the ink on the transfer paper is not particularly limited.

As described in detail above, according to the present invention, the image information on the object to be read is converted into measure signals for each different colorimetry, and the thermal resistor is used in accordance with the image information signals for each color. By driving the nine-line print head, the corresponding ink of the thermal transfer body is used to overlay the transfer onto the transfer material, resulting in miniaturization, maintenance-free operation, and improved reliability.Moreover, it is possible to reduce costs. It is possible to provide a color printing device that can measure the decrease in color.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention.
2 is a cross-sectional view showing the internal mechanism, FIG. 2 is a view showing the ink layer of paper, and FIG. 3 is an external perspective view of the contact sensor scanner section.
Figure 4 is a sectional view showing the line tod sensor section, Figure 5 is a diagram showing the drive circuit of the light emitting LED, Figure 6 is a plan view of the thermal head, Figure 7 is a sectional view of the hood thermal head, and Figure 8 is a sectional view of the hood thermal head. A cross-sectional view showing the heat generating part of the thermal head, Fig. 9 (11
~(c) are diagrams showing the type of transfer process, Figure 10 is an electrical circuit diagram of the thermal head, Figure 11 is a block diagram showing the overall schematic configuration, Figures 12(a)-1 and 13(a). ~(
fl is a timing chart for explaining the operation. 5...Contact sensor scanner part!・-Detector, 8...
・Detector %9...Pulse motor Jl, P...Paper (
Transfer material), 13... Winding drum, 11... Transfer paper (thermal transfer body), 20... Detector, 2J... Pulse motor. 25...Detector, 12...Detector, 77-axis pulse motor, 34...Pulse motor, 45...-L E D
Array, 49. So, 5J-axis light emitting LED, yz...
Heating resistor, sr--operation unit, a, s-CPtJlm
s・e+ ROM.

Claims (1)

[Claims] means for converting 1 information on an object to be read into 1 signal for each different color; a thermal transfer member on which ink of a color corresponding to the 1 signal obtained by this means is intercolored in a band-like manner; Thermal heating using a thermal resistor according to each signal
A color printing apparatus comprising: a transfer means for superimposing a transfer onto a transfer material using ink corresponding to the thermal transfer body by driving a line tod head.