Circular strip means and images former
A technology of endless belt and rotary shaft, which is applied to devices using optical methods, electrical recording technology using charge graphics, and equipment using electrical recording technology using charge graphics, which can solve the problem of static electricity on the surface of the ring belt and difficult to set marks The number of problems, the detection side and the detected side are too close to achieve the effect of reducing the impact of static electricity, improving detection accuracy, and improving miniaturization
Inactive Publication Date: 2007-05-09
RICOH KK
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Problems solved by technology
[0010] In the method where the shaft end is D-shaped and a light transmission sensor is used, it is also difficult to reduce the size of the detection mechanism. At the same time, when adjusting the detection accuracy, it is difficult to set the number of markers arbitrarily.
[0011] Marks are set around the photosensitive drum, and in the photo-interrupter detection method, due to the fear of changes in the photosensitive characteristics of the photosensitive drum, the detection side and the detected side cannot be too close, so the detection accuracy is difficult to improve
In addition, since the mark is electrified, it will have an electrostatic effect on the surface of the endless belt.
[0012] In addition, in the conventional technology, the detection part is in the environment where the toner and dust float, which will cause the toner and dust to adhere for a long time, resulting in low detection accuracy.
Method used
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[0058] Below, the first embodiment of the present invention will be described in detail with reference to Fig. 1-Fig. , the present invention is not limited thereto.
[0059]First, an outline configuration of a color printer as an image forming apparatus will be described with reference to FIG. 1 . In the central part of the apparatus body, a transfer belt assembly 10 as an endless belt device including an intermediate transfer belt 11 as an endless belt and four image stations are disposed.
[0060] Each image station is respectively provided with a photoreceptor drum 20Y, 20C, 20M, 20Bk as an image carrier, and a dedicated charging device 30Y, 30C, 30M, 30Bk, and a developing device 50Y, 50C, 50M, 50Bk are arranged around it. Cleaning devices 40Y, 40C, 40M, 40Bk. In the present invention, the symbol Y represents yellow, C represents cyan, M represents magenta, and Bk represents black.
[0061] On the upper part of the apparatus body, a toner bottle set 9 for replenishing ...
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An image forming device with ring shaped belt is prepared as using driven roller, driving roller and entrance roller to support intermediate reprinting belt commonly; forming identification on peripheral surface of rotary shaft on entrance roller; setting transducer on frame of reprinting belt component; containing front end of said rotary shaft in bearing of transducer frame; positioning identification and reflective transducer both fixed in transducer frame and making them surround around detection unit to not let toner and powder enter into detection unit.
Description
technical field [0001] The present invention relates to an endless belt device and image forming devices such as copiers, printers, facsimile machines and plotters equipped with the endless belt device. The endless belt device is provided with an endless belt, and the endless belt can be used as an image carrier, or can also be used as a conveying belt, and is used to carry the medium for forming an image, or can also be press-contacted with the medium. Background technique [0002] For example, in a tandem color image forming apparatus in which several photoreceptors are arranged side by side as image carriers, the endless belt serves as an intermediate transfer body, and the toner images formed on each photoreceptor are sequentially superimposed and transferred on the intermediate transfer body. On the endless belt, the superimposed toner image is transferred to the recording medium at one time to obtain a color image. [0003] As described above, in the endless belt syst...
Claims
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Inventor 斋藤大享武市隆太古屋政治中山贵裕
Owner RICOH KK