JPH0353955A - Perfecting printer - Google Patents

Abstract

PURPOSE:To obtain a printer capable of printing on the both surfaces of paper at the same time by a method wherein a first printing part consisting of a printing head conducting printing on one surface of fed paper and a platen and a second printing part consisting of a printing head conducting printing on the other surface thereof and a platen are provided, and the first printing part and the second printing part are disposed so that the printing positions thereof are shifted to each other. CONSTITUTION:The perfecting printer is provided with a first printing part 13 consisting of a printing head 11 disposed so as to apply printing on one surface 10a of fed paper 10 and a platen 12 disposed so as to face the printing head 11 across the paper 10 and a second printing part 16 consisting of a printing head 14 disposed so as to apply printing on the other surface 10b of the paper 10 and a platen 15 disposed so as to face the printing head 14 across the paper 10. The first printing part 13 and the second printing part 16 are spaced a distance l from each other so as not to interfere with each other. Therefore, printing can be simultaneously applied on the both surfaces of paper using the first printing part 13 and the second printing part 16.

Description

[Detailed Description of the Invention] [Summary] Regarding a print printer used as an output device for a computer, etc., the purpose is to be able to print on both sides of a sheet of paper at the same time. A first printing section consisting of a platen, and a second printing section consisting of a dot and a platen are provided for printing on the other side, and the first printing section and (1) the second printing section. are arranged so that their printing positions are shifted from each other.

[Industrial application field]

The present invention relates to a print printer used as an output device for electronic computers and the like.

[Conventional technology]

FIG. 2 is a diagram for explaining the printing section of a conventional printer. In the figure, 1 is a print head, 2 is a platen,
3 is paper. Printing is carried out by a printing head l while paper 3 is conveyed so as to pass between a print head l and a platen 2.

[Problems to be Solved by the Invention] In order to reduce the amount of paper used, improve the efficiency of document storage, etc., it is thought that the need for printing on both sides of paper will increase in the future.

However, the conventional printer described above has a problem in that in order to print on both sides of a sheet of paper, it is necessary to print on one side, then turn the sheet over and (2) re-set it.

In view of the above conventional problems, an object of the present invention is to provide a printing printer that can simultaneously print on both sides of a sheet of paper without having to turn the sheet over.

[Means to solve the problem]

In order to achieve the above object, the print printer of the present invention includes a first printing section l3 consisting of a print head 11 and a platen 12 that print on one side of the paper 10 being conveyed;
Print head 14 and platen 15 that print on the other side
A second printing section 16 is provided, and the first printing section 13 and the second printing section 16 are arranged with their printing positions shifted from each other.

[For production]

The first printing section 13 and the second printing section 16 can simultaneously print on both sides of the paper. Therefore, there is no need to turn the paper over, and printing can be done in a time close to A compared to printing on one side at a time (3).

〔Example〕

FIG. 1 is a diagram showing an embodiment of the present invention.

As shown in FIG. 1, this embodiment includes a print head 11 arranged so as to be able to print on one side 10a of a conveyor belt 10 being conveyed, and a print head 11 with the retainer 10 sandwiched between the print head 11. A first printing section 13 is provided which includes platens 12 arranged to face each other. Also, the other side 10b of the paper 10? The print head 14 is arranged so as to be able to perform this printing, and the print head 14 is equipped with a printing head 1.
A second printing section 16 is provided which includes a platen 15 and a platen 15 arranged to face each other with 0 interposed therebetween. and the first
The printing section 13 and the second printing section 16 are arranged at a distance l apart from each other so as not to interfere with each other.

In addition, the print head 11.14 uses a dot impact method,
A thermal transfer method or the like is used. Further, although the platen 12.15 is shown in the form of a roller in the figure, it may have another shape.

(4) In this embodiment configured as described above, the first printing section 13 and the second printing section 16 can simultaneously print on both sides 10a and 10b of the rug 10. Note that during printing, a line feed is performed when both print heads II and 14 finish printing one line, and printing on both sides is performed in synchronization. Also the first
The printing section 13 is provided with a pressure roller 17 that presses the paper 10 on the platen 12, and the platen 12 is set as a driving roller, and the platen l5 of the second printing section 16 is set as a driven roller, so that the paper 10 is forced by the platen l2. If you transport it properly,
The paper 10 does not slacken between the first printing section 13 and the second printing section 16.

〔Effect of the invention〕

As explained above, according to the present invention, by providing two print heads, it is possible to print on both sides at a speed close to the speed at which one side of paper is printed, and it is possible to save paper and printing time. This also contributes to improving the efficiency of document storage.

[Brief explanation of drawings]

(5) FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram for explaining the printing section of a conventional printer. In the figure, 10 is paper, 11.14 is a print head, 12.15 is a platen, l3 is a first printing section, 16 is a second printing section, and 17 is a pressure roller.

Claims (1)

[Claims] 1. A first printing unit (13) consisting of a print head (11) and a platen (12) that print on one side of the paper (10) being conveyed, and a print head (13) that prints on the other side.
4) and a second printing section (16) consisting of a platen (15).
A double-sided printing printer characterized in that the first printing section (13) and the second printing section (16) are arranged with printing positions shifted from each other.