image forming apparatus
An image and image carrier technology, which is applied to the electrical recording process using the charge pattern, equipment and instruments for the electric recording process using the charge pattern, and can solve developer splashing, developer image dislocation, and horizontal lines in the transferred image and other problems to achieve the effect of suppressing image defects
Active Publication Date: 2020-07-03
KYOCERA DOCUMENT SOLUTIONS INC
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Problems solved by technology
When an airflow is generated in the space, the developer is splashed at the developing nip, and the developer image carried on the image bearing surface of the photosensitive drum is misaligned.
As a result, image defects such as horizontal lines occur in the transferred image on the sheet.
Method used
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Embodiment Construction
[0014] Next, an image forming apparatus according to an embodiment of the present invention will be described with reference to the drawings. figure 1 It is a diagram schematically showing the configuration of an image forming apparatus 1 according to an embodiment of the present invention. For example, the image forming apparatus 1 is a printer, a copy machine, a facsimile machine, or a digital multifunction machine having these functions. In the following description, the term "sheet" refers to copy paper, coated paper, OHP sheet, thick paper, postcard, tracing paper, and other sheet materials subjected to image forming processing, or any Handled flake material.
[0015] The image forming apparatus 1 is provided with an image forming unit 20 , a fixing unit 30 , a sheet conveyance path 40 , and a sheet conveyance guide 50 in an apparatus main body 10 .
[0016] The image forming unit 20 forms a developer image (toner image) on the sheet P, and includes a photosensitive dru...
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The image forming apparatus of the present invention includes: an image carrier having an image-carrying surface rotatable around an axis extending in a first direction; a developing unit for supplying a developer to the image-carrying surface to form a developer image; a transfer unit for carrying the image The developer image on the surface is transferred to the transfer surface of the sheet; the pre-transfer conveyance path conveys the sheet from the developing unit to the transfer unit; the guide member forms the side of the pre-transfer conveyance path that faces the transfer surface, It includes: a plate-shaped guide body having a guide surface facing parallel to the transfer surface of the conveyed sheet; The direction of the curved portion bulged toward the outside of the pre-transfer conveyance path, and the top edge of the downstream side of the top end is arranged facing the image carrier, and the front end of the sheet conveyed along the guide surface and the image carrier In the abutting state, the leading end edge of the leading end portion is provided at a position with a gap therebetween with respect to the transfer surface of the sheet.
Description
technical field [0001] The present invention relates to an image forming apparatus for transferring a developer image onto a sheet. Background technique [0002] An image forming device for transferring a developer image to a sheet includes: a photosensitive drum having an image bearing surface for bearing a developer image; a developing roller forming a developing nip facing the image bearing surface; surface contact to form a transfer nip; and a registration roller pair that conveys the sheet to the transfer nip. In the developing nip, a developer is supplied from the developing roller to the image bearing surface to form a developer image, and the sheet passes through the transfer nip to transfer the developer image on the image bearing surface to the surface of the sheet. As such an image forming apparatus, an apparatus having a guide is known. The guide is disposed near the upstream of the transfer nip in the sheet conveyance direction, and guides the sheet conveyed b...
Claims
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IPC IPC(8): G03G15/16
CPCG03G15/1605G03G15/6558G03G2215/00675G03G15/16G03G15/6529
Inventor 中村新渡边刚史
Owner KYOCERA DOCUMENT SOLUTIONS INC