JPS58111955A - Handling device for sheet in double side copying machine or the like - Google Patents

Abstract

PURPOSE:To prevent jamming in the stage of double side copying by providing a coveying path which returns the paper copied on one side to a paper feed section without passing through an intermediate tray. CONSTITUTION:In the case of copying plural sheets on double sides, the paper fed from a cassette 10 is copied on one side and after the paper passes through a pair of fixing rolls 13, the paper is inverted with an inverting path 15, and is fed to an intermediate tray 18 with discharge rolls 16. The paper copied on one side and stored in the tray 18 is again deliverd out with feed rolls 19 and is copied on the another side, then a flapper 14 is changed over to discharge the paper through the rolls 16 onto a discharge tray 22. In the case of copying only one sheet on one side, the paper copied on one side is fed through an auxiliary conveying path 21 by changing over a flapper 17 without passing the same through the tray 18; therefore, paper jamming is difficult to arise.

Description

DETAILED DESCRIPTION OF THE INVENTION This service is applicable to double-sided copying machines, double-sided printing machines, double-sided recording machines, and other machines equipped with a mechanism for conveying double-sided recording sheets (
The present invention relates to a sheet handling device for a double-frame copying machine (hereinafter simply referred to as a double-frame copying machine, etc.), and relates to a sheet conveyance path handling device.

Conventionally, in this type of device, a piece of sheet with INK marking is once led to an intermediate tray (a tray that stores single-sided recorded sheets) and inspected, and then the stacked sheets are aligned and separated again. Then, the paper is re-fed in the reverse direction, and the timing is 9%, so that writing can be done on both sides of the sheet.

Therefore, jams or skewed feeds often occur at this intermediate tray portion where the conveyance of one sheet is temporarily stopped (1) This has the disadvantage that the processing thereof is complicated.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a novel sheet handling device for a double-sided printer, which has been improved in view of these drawbacks.

Another object of the present invention is to provide a sheet handling device for a double-sided copying machine that can perform double-sided recording by selecting a sheet conveyance path to eliminate causes of sheet jamming, skewing, etc. as much as possible.

That is, the structure of the present invention that can achieve the above object is such that, after recording, it is stored and placed on an intermediate tray and fed again, so that it can be written on the other side of the sheet and recorded on both sides of the sheet. In a sheet handling device of a two-way copying machine that handles the conveyance of sheets, a sheet that has been recorded on one side is guided to a sheet feeding means and passed through the intermediate tray to be fed again to the recording section in order to record on the other side. This sheet handling device, such as a double-sided copying machine, is characterized by being able to transport a sheet by selecting another transport path.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. The figure is a cross section of an embodiment of the present invention.

In the figure, the light source 2 and the scanning mirror 3 scan the original placed on the original placing table 1, and the second frame 4 and the lens 5% move at 1/2 the speed of the scanning mirror 3.
y-6, 1lE4 Equipped with an optical system that forms an image on the photosensitive drum B via t-1-7, forms a toner image on the drum 8 by the developing device 9, and forms the toner image on the drum 8. At the same time, the transfer paper is separated and fed from the paper cassette 10 by the paper feeding tray 101, and further fed by the registration rollers 11 at the right timing.After being transferred, the transfer paper is transferred to the foot applicator 15 by the conveyor bell) 12. The toner image is fed, fixed onto the transfer paper, and then ejected. Any known configuration of the process may be used as appropriate. If the operator issues a command to obtain a double-sided copy by operating a key or the like (not shown), the copy paper is guided in the direction of the arrow by the transfer paper flap 14 and enters the reversing bus 15.

The paper discharge roller group 16F has a configuration of 1.5 rollers, and after the transfer paper has completely entered the reversing path 15, it is configured to apply a conveying force to the transfer paper in the direction of arrow B.1 At this point, the transfer paper is warped. be done.

Next, the operator must use the numeric keys (not shown), etc.
When the number of IIs is plural, the transfer paper is guided to the intermediate tray 18 by the 7 wrapper 17, temporarily stands by in the intermediate tray 18 until the required number of copy cycles are completed, and is loaded and stored, and then the operator In response to the second side copy command, the sheet is fed again to the copying process at the refeed roller 19. Here, as mentioned above, the intermediate tray 18 is required when a plurality of copies are required;
As mentioned above, providing discontinuous parts such as 60 may cause jams and reduce the reliability of the machine. Therefore, in this configuration, when the required number of parts is 1, the flapper 17 is switched and the intermediate The transfer paper is guided to a separate conveyance path 21 that does not involve the tray 18, and is always restrained by a conveyance loaf or a conveyance belt (not shown) between them. Make sure that the loop is formed in front of registration roller 11! When the paper is detected by an Italo switch or the like, the registration row 220 and the conveyance row 220 in front of the register stop and are ready for the second side copy command. The subsequent second side copy process is exactly the same as described above, and the paper is guided to the transfer paper tray 21 after the second side has been copied.

As explained above, in the present invention, the sheet conveyance path can be arbitrarily selected between passing through an intermediate tray and passing through another conveyance path without passing through the intermediate tray. For example, I must! When the number of copies is one, a conveyance path that does not pass through an intermediate tray allows for selective conveyance that prevents sheets from being skewed or jammed by 5%.

[Brief explanation of drawings]

The figure is a sectional view of an embodiment of the invention. 17 is a flapper, 118 is an intermediate tray, 2
1 is another conveyance path. Applicant Canon Co., Ltd.

Claims (1)

[Claims] After recording on one side of the sheet fed from the sheet storage section, it is stored and stacked on the -1 intermediate tray and fed again, so that it is recorded on the other side of the sheet and is printed on both sides of the sheet. In the sheet handling device of the 5-box copying machine Misaki, the scissors are used to guide the sheet feeding means to the sheet feeding means for recording on the other side of the sheet, and to feed the sheet again to the recording section. A sheet handling device, such as a screen copying machine, characterized in that a sheet can be transported by selecting another transport path that does not pass through a tray.