JPS59147370A - Form separating device of copying machine - Google Patents

Abstract

PURPOSE:To eliminate damages to a photosensitive body due to form separation by separating a form from the photosensitive body by aerodynamic force. CONSTITUTION:When a form 3 is sent to transfer a visible image on the photosensitive body 1, the image is transferred to the form 3 by a transfer corotron 2. Then, when the form 3 reaches the position of a negative pressure generator 5, air is blown out of a nozzle 6. Consequently, air tends to flow along a wall surface, so the air blown out of the nozzle 6 flows away from the form 3. Therefore, negative pressure is produced over the form 3, which is drawn upwardly to be separated from the photosensitive body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper peeling device for peeling paper from a photoreceptor of a copying machine.

Conventional paper stripping devices of this type have a wedge-shaped device called a stripper finger that is applied directly to the surface of the photoconductor to remove the paper, which can damage the photoconductor with the stripper finger. One of the causes of poor copy quality
It is one.

The present invention has been developed in view of the above-mentioned problems, and by using ink to peel paper from a photoreceptor using air force,
It is an object of the present invention to provide a paper peeling device for a copying machine that can eliminate damage to a photoreceptor due to paper peeling.

Embodiments of the present invention will be described below based on the drawings.

In the figure, 1 is a photoreceptor, 2 is a transfer corotron, and while the photoreceptor 1 rotates in the direction of the arrow, a copy latent image is developed with toner at a position not shown in the figure and becomes a visible image 9. In turn, the image is transferred by the corotron 2 onto a sheet 3 fed between the transfer corotron 2 and the photoreceptor 1.

The transferred paper 3 is sent to a transport 4 at the same speed as the rotational circumferential speed of the photoreceptor 1, and is then discharged to the outside via a fixing device.

Reference numeral 5 denotes a negative pressure generating device provided between the transfer corotron 2 and the transport 4, and this negative pressure generating device 5
an air blowing nozzle 6 provided toward the moving direction of the
It consists of an upper guide wall 7 extending from the nozzle 6.

This guide wall 7 is formed in an arc shape in a direction away from the photoreceptor 1.

In the above sequence, when the paper 3 is sent to transfer the visible image on the photoreceptor 1, it is transferred onto the paper 3 by the transfer corotron 2. Thereafter, when the paper 3 reaches the position of the negative pressure generator 5, air is blown out from the nozzle 6. In this case, since air (fluid) tends to flow along the wall surface, the air blown out through the nozzle 6 flows in a direction away from the paper 3. Therefore, a negative pressure is applied to the upper side (back side) of the paper 3, and the paper 3 is pulled upward and separated from the photoreceptor 1.

The present invention is as described above, and the paper 3 is separated from the photoreceptor 1 by applying negative pressure to the upper side of the paper that has been sent together with the photoreceptor 1 through the transfer corotron 2. This eliminates damage to the photoreceptor 1, and the life of the expensive photoreceptor 1 can be extended.

[Brief explanation of drawings]

The drawings are cross-sectional views showing essential parts of embodiments of the present invention. 1 is a photoreceptor, 2 is a transfer corotron, 3 is paper, 4 is a transport, 5 is a negative pressure generator, 6 is a nozzle, and 7 is a guide wall. Applicant Fuji Xerox Co., Ltd. Agent Patent Attorney Masaaki Yonehara Patent Attorney Tadashi Hamamoto

Claims (1)

[Claims] A copying machine in which a visible image developed on a photoconductor 1 is transferred onto a sheet of paper 3 that moves along with 10 rotations of the photoconductor by a transfer corotron 2, and the sheet of paper 3 after transfer is discharged from a transport 4, Transcription corotron 2 and transport 4
an air blowing nozzle 6 provided between the nozzle 6 and the paper 3 in the moving direction of the paper 3; A paper peeling device for a copying machine, characterized in that it is provided with a negative pressure generating device comprising a guide wall 7 formed therein.