SU369538A1 - ELECTROPHOTOGRAPHIC DEVICE MANAGING DEVICE - Google Patents

Description

This invention relates to rotary electrophotographic apparatuses with cascade development. Developing devices of the electrophotographic apparatus are known, which consist of a bucket conveyor that feeds the developer from the upper bunker to the surface of the electrophotographic cylinder, the buffer tank, collects the excess of the developer and carrier, and the limiting plate. directing the developer to the lower buffer bin. In these devices, the bounding plate is set at a distance of 2-3 mm from the surface of the electrophotographic cylinder so as not to scratch the latter. But its installation at such a distance leads to a quench of pro Vitel. In addition, the known devices occupy a large area around the perimeter of the cylinder. In order to protect the electrophotographic layer from mechanical damage and eliminate spillage of the developer, in the proposed device, the plate is parallel to the generator surface of the cylinder and is movably mounted, has limiters at its ends to maintain a constant gap between it and the cylinder, and is provided with a spring-loaded rod to press the stops to the cylinder and their removal from the cylinder and a spring to press against the body of the development unit. The limiters on the movable plate are adjustable. The drawing shows a diagram of the proposed device. The device consists of a subframe of a restrictive plate 1, a body 2 of a knockout unit, flat springs 3 p 4, a rod 5, a guide bushing 6, a cam 7, springs 8, limiters 9 and 10, an electrophotographic cylinder 11, washers 12, a photo-polypropylene layer 13 and spring 14. The device operates as follows. The movable plate, which is pressed against the body of the development unit with the help of flat springs 3 and 4 fixed to it, is freely mounted on the rod 5. The guide sleeve 6 is rigidly fixed in the body of the development unit. If the rod 5 is placed in direction P with the help of the cam 7, then under the action of the first spring 8 the plate will move until the stops 9 and 10, locked on the plate, come into contact with the non-working sections of the electrophotographic cylinder 11. If the rod 5 is moved further so that the plate is free from action washers 12, the limiters are pressed to the electrophotographic cylinder by a spring 8 and not to any oscillations of the cylinder (nanrnmer, due to the ellipticity of the cylinder or its eccentricity) the gap between the photoconductor The outer layer 13 and the movable plate I, which is an extension of the lower side of the development unit, is kept constant. Its value, d, depending on the developer used, is set in advance by limiters 9 and 10 such that there is no spilling of the protractor and carrier, as well as the scratching of the electrophotographic cylinder during operation of the device.

If the rod is released from the action of the cam 7, then under the action of the spring 14, the plate will move up to the stop from the limiter by means of the spring 4 and 3, which also have the guide plates for the moving plate. At the same time, the distance to the surface of the tsiliidr is 3-5 mm, which excludes damage to the layer 13 when the cylinder is removed or installed //.

Subject invention

1. A developing electrophotographic apnarat device, consisting of a vertical hopper, a conveyor belt, a lower bunker and a limiting plate that guides the excess of the developer and the carrier from the electrophotographic cylinder to the lower bunker, characterized in that, in order to protect the electrophotographic layer from mechanical damage and elimination of the requested pro- cider, the plate is laid parallel to the generator surface of the cylinder and set in motion, has limiters at its ends to maintain a constant Zor between it and cylinder, Double side not provided with a rod for pressing podiruzhinenny.m limiters to cylinder and retraction of the cylinder and a spring for pressing to the housing assembly manifestations.

2. Device for and. 1, characterized in that the limiting plate on the movable plate is made regulator: 1 operable11.

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