JPS62105827A - Simplified double-sided type printer - Google Patents

Abstract

PURPOSE:To continuously type the double sides of a blank by swinging the sheet discharge side stocker of a printer for supplying a blank from the upper surface of a machine body and discharging the blank from the upper surface, and automatically overturning the discharged blank to return it to the blank supply position. CONSTITUTION:A blank supplied from a blank supply bed 10 is transferred by a platen 3 and auxiliary rollers 4, 5 while having the lower side typed by a printer 2, and sent between a blank discharge roller 6 and a blank discharge holder plate 7. Next, the blank passes through passages i, j and the rear end of the blank is dropped by its own weight as shown by the dotted line k and received in a stocker 9 to complete the one side typing. When both-side typing is needed, the stocker 9 is swung about a shaft 14 by a plunger 16 and shifted to a position shown by the dotted line in the drawing. The blank dropped through a passage k is overturned and transferred again between the auxiliary roller 4 and the platen 3 for typing 2. Thus, the back of blank can be also continuously typed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention is a printer that can automatically print on both sides of paper.

[Background of the invention]

The attached Japanese Patent Laid-Open Publication No. 2003-110000 realizes the same function as the present invention, and automatically prints on both sides of paper by passing through a complicated paper path. The present invention was devised in response to a demand for realizing the same functions as those in the attached Japanese Patent Application with a simple mechanism, and can be realized by adding two or three parts to an ordinary device as in this embodiment. However, the invention disclosed in the attached patent application is capable of detecting a large number of sheets that are printed on both sides of the paper continuously using an automatic paper feeder, but in the present invention, after the paper is automatically printed on both sides, the paper must be removed manually. Printing cannot be continued (printing only on the front side is possible) [Object of the Invention] An object of the present invention is to provide a mechanism that automatically prints on both sides of a sheet of paper.

[Summary of the invention]

゛) When the printer shown in the attached figure is installed with the side to be printed facing down on the paper feed tray 10, after the printing is done, the printer returns to the paper output side stocker 9 of the paper feed tray 1o with the printed side facing up. come. Therefore, the idea is that printing means that the paper has been turned over, and that if the paper is fed to the printing section again, it is possible to print on the back side as well. Therefore, the notation function is realized by making the stocker 9 movable and making it possible to select between the position of receiving discharged paper and the position of dropping it directly into the paper feed slot.6 [Embodiments of the Invention] Figure 2 shows an embodiment of the present invention. Although this embodiment is an example of a thermal transfer printer, it can be implemented with any printer shown in the claims.

Figure 1 shows a sectional view of the overall structure. The platen 3 and the auxiliary force rollers A, B, 4, and 5 move the paper (not shown) along the paper path a →
(t) ) , -* 04 d -) 6-4f →
g, the paper is further passed through the paper ejection roller 6 in the order of →i→j, and together with the film paper, is passed between the platen 3 and the head 2 for printing.

FIG. 2 is a detailed cross-sectional view of the main part of the paper path in the above embodiment. The paper discharge side stocker 9 is swingably fixed to left and right side plates (not shown) at a fulcrum 14, and a restoring force is elastically applied to one side by a spring 15 or the like, and a solenoid 10 or the like is applied to the opposite direction. The paper can be moved to the position 9' shown by the dashed-dotted line according to the command.0 When printing only on the normal surface, it is at the position 9 shown by the solid line, and the paper is placed on the paper feed tray 10 with the side to be printed facing down. The leading edge of the paper is set at the contact portion C between the platen 3 and the auxiliary roller 4 either by being manually dropped into the slit a or via the slit b of an automatic paper feeder (not shown).

In this state, the platen 3 is driven to move the paper along the path d.

The paper passes along el+f+g, and is being driven by the platen 3 and rotating at the same speed (or approximately the same circumferential speed) as the platen. The paper h-+i passes through the gap between the paper discharge roller 6 and the paper holding plate 7, and the leading edge bends under its own weight and climbs up with the side printed on the upper surface of the paper feed tray 10 facing upward. The trailing edge of the paper.

After passing through the printing section, the paper is driven by the paper ejection roller and returns to the paper ejection side stocker 9 through the broken paper path k. It falls into the valley and finishes printing on the surface. Thereafter, printing only on the front surface can be continued in the same manner. Therefore, if you wish to perform continuous printing on the front and back sides, 1. After completing the normal paper setting (from the time the leading edge of the paper is placed at position C until the end of front side printing and the trailing edge of the paper passes the paper ejection roller 6), command The solenoid 16 moves the paper discharge side stocker 9 to the chain paper 9'.
If the trailing edge of the paper is moved to position C, the trailing edge of the paper will pass through path k and fall to position C, which will become the leading edge of the paper for printing on the back side. Similarly, the command is released during printing on the back side, and the paper falls into the trough of the stocker 9 on the paper discharge side, and printing ends. After this, printing only on the front side can be continued as usual, but
When printing on the back side, the previous printed paper remaining in the troughs of the stocker on the paper output side becomes a hindrance and falls to section C, so there is no submergence. Therefore, when printing on both sides continuously, print the paper on the paper output side stocker 9 after printing on the front and back sides. It is necessary to input and remove the paper on which printing has been completed from the troughs each time.

〔Effect of the invention〕

According to the present invention, by adding the solenoid 16 and the return spring 15, it is possible to automatically form characters on both sides with a simple structure.

In this case, in the normal printing method, if the front side of the paper with printing on both sides is aligned in the normal direction (the direction in which the characters or pictures can be read correctly) and the top edges are stitched together, then when the paper is turned upward and opened, the previous page is The printing on the back side and the front side of the atrium are arranged so that they can be read in a continuous manner (see Figure 3).

However, in the case of right binding or left binding, the back side will be upside down, which is not practical.This is because if a part of the printed content can be stored in the memory of the host computer or this printer, printing will start from the end only when printing on the back side. Similarly, in the case of characters, by printing from the end of the sentence and rotating the characters by 180', it is possible to print in the normal front-back relationship even with right or left binding.

[Brief explanation of drawings]

FIG. 1 shows a sectional view of the overall structure of the present invention, and FIG. 2 shows a detailed sectional view of the paper path section. In Fig. 3, according to the present invention, 1... main body,
2... Thermal head, 3... Platen, 4.5.
...Auxiliary rollers A, B, 6... Paper ejection roller, 7...
Paper discharge presser plate, 8... Guide, 9... Paper discharge side stocker, 10... Paper feed tray, 12.13... Ink film supply 2 winding roller, 14... Fulcrum (paper discharge side stocker), 15... return spring, 16... solenoid.

Claims (1)

[Claims] 1. In various printers such as thermal printers that feed paper from the top of the machine and eject paper from the top, by swinging the stocker section on the paper ejection side, the ejected paper is automatically turned over and placed at the paper feeding position. Single-color and multi-color printers that have a structure that allows printing on the back side of paper continuously.