JPH0195068A - Image forming device - 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] [Summary] The present invention relates to the structure of a thermal transfer type multicolor image forming device, and aims to improve efficiency when recording only black, which is the most common color, by connecting a thermal head to an ink ribbon and a medium. In a thermal transfer type image forming apparatus that presses a platen to form an image on the medium, ink ribbons are provided independently for each color of yellow, magenta, cyan, and black, and a thermal head is attached to each ink ribbon of each color. There are four corresponding ink ribbons and a first and second platen, with yellow, magenta, and cyan ink ribbons and thermal heads facing the first platen, and black ink ribbons and thermal heads facing the second platen. In the case of black monochrome recording, a bypass is provided to feed the medium directly from the hopper while the second platen and the black ink ribbon are in contact with each other.

[Industrial application field]

The present invention relates to the structure of a thermal transfer type multicolor image forming apparatus.

In recent years, there has been a strong demand for full-color recording, and image forming apparatuses of various types have been realized.

The thermal transfer multicolor image forming device can print yellow, magenta,
Four thermal heads corresponding to each color, cyan and black, are used to perform recording overlapping the medium, but there is a demand for increased efficiency when recording only black, which is the most common color.

[Conventional technology]

As shown in the side view of FIG. 2, in the image forming apparatus, ink ribbons IY, IM, and 1C11BL of each color of yellow, magenta, cyan, and black are placed in cassettes 2v- and 2, respectively.
M, 2c% 2! It is stored in the IL so that it can be drawn out.

Ink ribbons LYS 1M and 1C1BL for each color of yellow, magenta, cyan, and black are opposed by thermal heads 3 vs. 3M, 30% 3BL, respectively, and cassettes 2Y12M for each color of yellow, magenta, and cyan,
2c and thermal heads 3Y, 3i, 3. are combined as shown in the figure to face the first platen 4, and the black cassette 2BL and the thermal head 38L are the other one.
The second platen 5 faces the second platen 5 .

During recording, the medium 6 is fed out from the hopper 7 by a feeding roller 8, and is supplied between the first platen 4 and the ink ribbon IV.

Then, the ink on the ink ribbon 1v is dissolved by the thermal head 3V and transferred onto the medium 6, thereby performing yellow recording.

Thereafter, in the same manner, the medium 6 is sequentially sent between the platen 4 and each ink ribbon LM, 1 by rotation of the first platen 4, and recording of each color of magenta and cyan is performed.

After that, the medium 6 is transferred to the second platen 5 and the ink ribbon IB.
It is sent between the L and L, where black toning recording is performed.

In this way, the medium 6 on which all colors have been recorded is
The paper is discharged by the discharge roller 9 and stacked on the stacker IO.

In addition, recording of each color mentioned above is performed selectively only for the necessary colors.
The medium 6 passes through the portion of the color that is not recorded.

[Problem to be Solved by the Invention 1] Recording of each color on the medium is performed as described above, but when performing monochrome recording of only black with this apparatus, the medium passes through the platen 4 which is unnecessary for recording. There is a problem in that extra time is wasted to reach the platen 5 and the processing time becomes longer.

[Means for solving problems]

FIG. 1 is a side view of the image forming apparatus of the present invention.

In the present invention, ink ribbons are provided independently for each color of yellow 17, magenta 1, cyan 1c, and black IIIL, and the thermal heads 37.3.4.3c, 3
．． Four ink ribbons 17.18% 1C11BL of each color are provided, and a first and second platen 4.5 are provided, and yellow, magenta, and cyan ink ribbons 11.114.1c and a thermal head are provided. 3Y13
M and 3C are opposed to the first platen 4, and the black ink ribbon IBL and thermal head 3BL are opposed to the second platen 5. In the case of black monochrome recording, the medium 6
The bypass 1 feeds the ink directly from the hopper 7 while the second platen 5 and the black ink ribbon 11BL are in contact with each other.
1 was established.

[Effect]

In the case of black-only monochromatic recording, the media unloaded from the hopper is fed directly through the first platen, via a bypass, and directly between the second platen and the black ink ribbon. Ru.

〔Example〕

FIG. 1 shows an embodiment of the present invention.

Identical parts are designated by the same reference numerals throughout the design.

In the present invention, as in the prior art, ink ribbons are provided independently for each color of yellow IY% magenta IM, cyan Ls black IBL, and the thermal head 3Y% 31
4.3C13sL ink ribbon of each color, 1M□,
1C%11BL, respectively, and two first and second platens 4.5, yellow, magenta, and cyan ink ribbons 17, IM, 1c, and thermal heads 3y, 3Hz 3c are the first platens. 1 ml of black ink ribbon and thermal head 3 are placed on platen 4 of
゜ is configured to face the second platen 5.

In the case of monochromatic recording of only black, the medium 6 is brought into direct contact with the second platen 5 and the black ink ribbon 11BL from the flopper 7 without going through the first platen 4 in order to shorten the processing time. Bypass 1 for feeding between
1 was established.

The bypass 11 has one end 11a opened between the first platen 4 and the hopper 7, and the other end 11b opened midway between the first and second platens 4 and 5.

The medium 6 fed out from the hopper 7 is switched to the first recording medium by the switching means 12 provided at one end 11a of the bypass 11 in response to a manual instruction or other instruction means for multicolor recording or monochromatic black recording. platen 4 or second platen 5.

Therefore, in the case of black monochrome recording, the medium 6 is fed out from the hopper 7 and passed through the bypass 11 to the second platen 5.
After being sent to the county and recorded as black in the same county, they are stacked in stacker 10.

〔Effect of the invention〕

As explained above, according to the image forming apparatus of the present invention, in the case of monochromatic recording of only black, the medium is sent directly from the hopper to the black recording section, reducing the feeding time and the processing time accordingly. This has great economic and industrial effects.

[Brief explanation of the drawing]

FIG. 1 is a side view of an image forming apparatus according to the present invention, and FIG. 2 is a side view of a conventional image forming apparatus. In the figure, IV% IM, 10% 1BL is ink ribbon, 2Y,
2M% 21:, 2! IL is cassette, 3Y, 3M%
3cs 31L is the thermal head, 4 is the first platen, 5 is the second platen, 6 is the medium, 7
8 is a hopper, 8 is a feed roller, 9 is a discharge roller, 10 is a stacker, 11 is a bypass, 11a is one end, llb is the other end, and 12 is a switching means. q Leaf drawing Chinese-style washcloth L/') Monk, 1st page, Figure 2

Claims (1)

[Claims] In a thermal transfer type image forming apparatus that presses a thermal head against a platen via an ink ribbon and a medium to form an image on the medium, the ink ribbon is provided with yellow (1_Y) and magenta (1_Y).
The thermal head (3_Y, 3_M, 3_C, 3_B
_L) to each color ink ribbon (1_Y, 1_M, 1
_C, 1_B_L), and a first and second platen (4, 5), respectively, to print the yellow, magenta, and cyan ink ribbons (1_B_L).
Y, 1_M, 1_C) and the thermal head (3_Y
, 3_M, 3_C) have a black ink ribbon (1_B_L) and a thermal head (
3_B_L) is opposed to the second platen (5), and in the case of black monochrome recording, the medium (6) is directly transferred from the hopper (7) to the second platen (5) and the black ink ribbon ( An image forming apparatus characterized in that an image forming apparatus is provided with a bypass (11) for feeding the image while the image forming apparatus (1_B_L) is in contact with the image forming apparatus.