Patent ID: 8047528
Filing Date: 2011-11-01
Classification: B65H

Abstract:
1. An image forming apparatus comprising: a sheet conveying path that conveys a sheet, which is fed from a paper feeding cassette by a paper feeding roller, to registration rollers with conveying rollers and conveys the sheet to a printing position with the registration rollers; a variable-speed registration motor that drives the registration rollers; a variable-speed conveyance motor that drives the conveying rollers; a variable-speed paper feeding motor that drives the paper feeding roller; and a control unit that performs driving control for the registration motor, the conveyance motor, and the paper feeding motor, wherein the sheet conveying path has a conveying path portion, the conveying path portion having a distance between the registration rollers and an initial conveying roller to which the sheet is fed from the paper feeding roller that is shorter than a conveyed length of an A4 size sheet, the control unit has an inter-sheet changing mode for setting sheet conveying speed by the registration rollers to different conveying speed in a period until a leading end of the sheet reaches the printing position, and the control unit drives, in the inter-sheet changing mode, the conveying rollers concurrently with sheet conveying speed during sheet conveyance by the registration rollers.