Image forming apparatus
A kind of equipment and image technology, which is applied to the equipment of the electric recording process using the charge pattern, the electric recording process using the charge pattern, and the electric recording technique, etc., which can solve the problem of image quality degradation, deviation of the accuracy of the transfer equipment and the fixing equipment, and the like. Record material transport quality degradation and other problems, to achieve the effect of easy fine-tuning and low cost requirements
Active Publication Date: 2009-05-20
RICOH KK
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Problems solved by technology
[0003] For such an image forming device, if the relative positional accuracy of the transfer device and the fixing device deviates, problems such as deterioration of recording material conveyance quality due to curling or wrinkling, or deterioration of image quality due to color deviation may occur.
Method used
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[0035] Hereinafter, best embodiments of the present invention will be described with reference to the drawings.
[0036] figure 1 Shown is an overall schematic configuration of a color printer as an example of an image forming apparatus according to the present invention. In the color printer shown in the figure, in the lower part of the image forming apparatus body 1, paper feeding cassettes 12A and 12B for storing paper 11 as a recording material are provided. image forming unit 3. In the image forming section 3, there are: image forming units 8Y, 8M, 8C, 8C having photoreceptor drums 10Y, 10M, 10C, 10K as image carriers; The intermediate transfer unit 7 of the transfer belt 7A; the writing unit 15 for performing optical writing on each photoreceptor drum; the fixing device 30 for fixing the unfixed toner image T on the paper; and the like. Here, the flexible intermediate transfer belt 7A is wound around three rollers 4 , 5 , and 6 as shown in the figure. Then, a transpo...
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The invention provides an image forming apparatus that responses to low cost requirement for the imaging forming apparatus recently and improves relative position precision between a transfer apparatus and a fixation apparatus to solve a problem of recording material convey quality and image quality caused by undesirable relative position precision. Its configuration is that images on a immediate transfer body (image bearing body) 7A is transferred to paper (recording material) 11 passing a transfer position P at a transfer apparatus 50, and are fixed to paper by a fixation apparatus 30 when the transfer images pass through fixation clamp N. The transfer apparatus of the image forming apparatus is provided with a bump 55 and the fixation apparatus is provided with a bump 56 protruded. Further a micro-adjusting device that adjusts slightly parallel between the transfer position and the fixation clamp is set when setting a relative position determining device A that determines the relative position between the transfer apparatus and the fixation apparatus when the bump 55 contacts the bump 56 protruded.
Description
technical field [0001] The present invention relates to image forming devices such as copiers, facsimile machines, printers, plotters, and their multifunction machines. In detail, after the image on the photoreceptor or the intermediate transfer body is transferred to the recording material passing the transfer position by the transfer device, the transferred image is held by the fixing nip. A fixing device is an electrophotographic image forming device that fixes a recording material. Background technique [0002] For example, in an image forming apparatus using an electrophotographic method, after charging and writing on a drum-shaped or belt-shaped photoreceptor to form an electrostatic latent image as the drum-shaped or belt-shaped photoreceptor rotates, a toner is applied by a developing device. After being visualized, a toner image is formed on the photoreceptor, and after the toner image is transferred by a transfer device at a transfer position directly or indirectl...
Claims
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IPC IPC(8): G03G15/00G03G15/20G03G15/16
CPCG03G15/2064G03G2221/1639G03G15/657G03G2221/1642G03G15/161G03G15/1605
Inventor 江原正尚山口嘉纪岩谷直毅
Owner RICOH KK