JPH0472227B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for clearing jammed paper in a paper conveyance device of a copying machine.

[Conventional technology]

Generally, in a copying machine having a duplex tray that temporarily stores a sheet of paper that has been copied on one side during duplex copying, a jam may occur when one-sided copying of the sheet is performed. If this jam occurs, the operator removes the jammed paper, then restarts the paper conveyance device, ejects the untransferred paper remaining in the paper conveyance path to the catch tray where the copied paper is stored, and copies the paper. was continuing.

[Problem that the invention seeks to solve]

However, with such copying machines, copy paper with final transfer and normal copy paper that has been copied are mixed in the catch tray, which is confusing, and the mixed copy paper must be sorted out after copying is complete. There was a problem that it was very troublesome because it had to be done.

[Means for solving problems]

The present invention was made in view of the above problems, and
To provide a method for clearing jam paper by storing the final transfer paper in a double-sided tray after processing the jam paper, refeeding the final transfer paper from the double-sided tray after copying, and discharging the final transfer paper to a catch tray.

[Effect]

In the present invention, since the final transfer paper can be stored in the double-sided tray during copying, the normal copy paper on which copying has been performed and the copy paper with the final transfer can be kept separate.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to FIGS. 1 and 2.

FIG. 1 is a schematic diagram of a copying machine to which the jam paper clearing method of the present invention is applied. In Figure 1,
1 is a paper feed tray, and paper 2 is placed in this paper feed tray 1.
is stored. The paper 2 is sent to a paper transport path 4 by a paper feed roller 3. A photoreceptor belt 5 is adjacent to the paper transport path 4, and a plurality of paper transport rollers 6 and a paper detection sensor (not shown) are also arranged.

The surface of the photoreceptor belt 5 is exposed to light 8 reflected from the original 7 by a lamp (not shown) via an optical system 9, and an electrostatic latent image is formed on the surface by this exposure. The photoreceptor belt 5 rotates in the direction of the arrow, and the electrostatic latent image on the surface is developed by the developing device 10.

The developed electrostatic latent image is transferred to the paper 2 that has approached the photoreceptor belt 5 by the conveyance roller 6 by the transfer corotron 11. The transferred paper 2 is transferred by a conveyance path switching device 15 which has a guide pawl that rotates in the direction of arrow a or b by electromagnetic power, for example, and switches the conveyance path. It is on the a side, passes through the conveyance path 4A, and is stored in the catch tray 16. Further, in the case of double-sided copying, the guide claw is on the b side, and the paper passes through the conveyance path 4B and is stored in the double-sided tray 17.
The stored sheets 2 are fed to the general feed path 4 by the feed roller 18 in a first-in, first-out manner.

In the copying machine described above, when a jam occurs during one-sided copying, the present invention is configured to operate as shown in FIG. In this method, the conveyance of the transfer paper 21 into the double-sided tray is controlled.

That is, when the operator presses the clear button after processing the jam paper in step 100, the process proceeds to step 101 and the guide claw is set to the b side. Next, in step 102, the conveyance roller 6 is rotated, and the final transfer paper 21 in the conveyance path 4 passes through the conveyance path 4B and is discharged onto the double-sided tray 17 (step 103).
Then, in step 104, the presence or absence of paper is detected by a paper detection sensor (not shown) installed in the transport path 4. If there is paper, the process returns to step 102 and the paper is ejected to the double-sided tray 17 by the transport roller 6, and if there is no paper, the process returns to step 105. Then, the conveyance roller 6 is stopped.
Next, in step 106, set the guide claw to the a side,
Single-sided copying can continue. When the clear button is pressed again after copying is completed, the feed roller 18 and conveyance roller 6 of the duplex tray rotate, and the final transfer paper 21 stored in the duplex tray 17 is rotated.
is sent to the conveyance path 4, and the catch tray 1 is sent through the conveyance path 4A opened by the switching device 15.
6, the data is ejected without being copied, and the operation ends.

〔Effect of the invention〕

As described above, in the present invention, the late-transfer paper that is jammed is stored in the duplex tray, and after copying is completed, the late-transfer paper is taken out from the double-sided tray and discharged to the catch tray. , it is possible to easily separate the normal copy paper on which copies have been made by pressing a button by the operator.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a copying machine to which the present invention is applied, and FIG. 2 is a flowchart of the present invention. 2...Paper, 4...Paper transport path, 15...Switching device, 16...Catch tray, 17...Double-sided tray, 20...Jam paper, 21...Final transfer paper.

Claims (1)

[Claims] 1. In a copying machine that has a duplex tray that temporarily stores paper that has been copied on one side during duplex copying, when a jam occurs due to single-sided copying, the remaining transfer paper is stored in the duplex tray by a conveyance path switching device, and after copying is completed, A method for clearing jam paper, which comprises refeeding the final transfer paper from a double-sided tray and discharging it to a catch tray.