Image forming apparatus with guide member guiding image...

Details Image forming apparatus with guide member guiding image... Image forming apparatus with guide member guiding image...

Filed on

2006-08-29

Date issued

2006-08-29

Examiner

Chen, Sophia S. (Department: 2852)

Patent Class

Electrophotography

SubClass

Image formation

SubSubClass

Transfer

Other Related Categories

C399S308000, C399S388000

Type

Reexamination Certificate

Status

active

Patent number

07099615

Description

ABSTRACT:
An image forming apparatus is capable of preventing toner on an intermediate transfer medium from being scattered toward a sheet and hence capable of effecting printing with favorable image quality that is free from noise and contamination. A sheet transported from a regist roller is guided toward a transfer belt serving as an intermediate transfer medium along a guide member and then guided to the transfer nip between the transfer belt and a secondary transfer roller via the upper end edge of the guide member. The sheet already comes into close contact with the transfer belt at a position upstream of the transfer nip. Consequently, even if an electric field for transfer emitted from the secondary transfer roller extends as far as the periphery of the transfer nip, no part of toner on the transfer belt will be scattered toward the sheet.

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patent: 6493534 (2002-12-01), Sawanaka et al.
patent: 6512904 (2003-01-01), Sato et al.
patent: 6516179 (2003-02-01), Sawai et al.
patent: 2004/0253025 (2004-12-01), Matsuura
patent: 2-176779 (1990-07-01), None
patent: 06-214470 (1994-08-01), None
patent: 10-177307 (1998-06-01), None

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