image forming apparatus
An image and image carrier technology, which is applied to the electrical recording process using charge graphics, equipment and instruments using the electrical recording process using charge graphics, etc., and can solve the problems of increased transport load, transfer offset, and reduced transfer magnification, etc. problems, achieve the effect of reducing the conveying load, suppressing jitter, and suppressing the reduction of transfer magnification
Active Publication Date: 2022-03-15
KYOCERA DOCUMENT SOLUTIONS INC
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Problems solved by technology
[0005] On the other hand, if the gap between the upper and lower pre-transfer guides arranged on the upstream side of the transfer nip with respect to the paper conveying direction is narrowed to suppress the vibration of the paper, paper with strong stiffness such as thick paper can be conveyed. When the conveying load becomes larger, there may be transfer defects such as lower transfer ratio and transfer offset.
Method used
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Embodiment Construction
[0036] Embodiments of the present invention will be described below with reference to the drawings. figure 1 It is a side sectional view showing the internal structure of the image forming apparatus 100 according to the first embodiment of the present invention. figure 2 yes means figure 1 A partial enlarged view of the paper transport path from the alignment roller pair 13 to the fixing device 15 in . Such as figure 1 As shown, in an image forming apparatus (for example, a monochrome printer) 100 , an image forming unit P that forms a monochrome image through the steps of charging, exposure, development, and transfer is disposed. In the image forming part P along the rotation direction of the photosensitive drum 5 ( figure 1 The counterclockwise direction) is equipped with a charging device 4, an exposure device (laser scanning unit, etc.) 7, a developing device 8, a transfer roller 14, a cleaning device 19, and a static elimination device (not shown).
[0037] The charg...
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The invention provides an image forming device. The image forming apparatus includes: an image carrier, a transfer member, a registration roller pair, and a transport guide. The conveyance guides include a first conveyance guide and a second conveyance guide facing faces of the image carrier side and the transfer member side of the recording medium conveyed from the registration roller counter to the transfer nip. The second conveyance guide has: a main body portion having a convex portion protruding most toward the first conveyance guide side in the recording medium conveyance path from the registration roller pair to the transfer nip, and formed adjacent to the downstream side of the convex portion. a stepped portion; an elastic member protruding toward the first conveyance guide side than a plane passing through the downstream-side end portion of the convex portion and the downstream-side end portion of the stepped portion; and a film member covering the main body portion together with the elastic member The opposite surface of the first conveying guide.
Description
technical field [0001] The present invention relates to an image forming apparatus such as a copying machine, a printer, and a facsimile machine, and more particularly, to a method for stabilizing a transport state of a recording medium upstream of an image carrier and a transfer member. Background technique [0002] In an image forming apparatus using electrophotography, a toner image is formed by attaching toner to an electrostatic latent image formed on an image carrier such as a photosensitive drum, and the toner image is transferred to a sheet-shaped object such as paper. After the medium is recorded, the toner image on the paper is fixed by a fixing device (fixing section). [0003] In such an image forming apparatus, since units such as a photosensitive drum and a developing device are densely packed from the viewpoint of saving space, the airtightness around the photosensitive drum becomes high. In the above structure, for example, when the front end of the paper en...
Claims
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IPC IPC(8): G03G15/16
CPCG03G15/16G03G15/1665G03G15/165G03G15/657G03G2215/00409G03G2215/00451G03G2215/00679
Inventor 冈本季明
Owner KYOCERA DOCUMENT SOLUTIONS INC