Patent ID: 7810808
Filing Date: 2010-10-12
Classification: B65H

Abstract:
1. An image forming apparatus comprising: an image forming unit that forms an image on a moving image carrier; a register roller that conveys a recording sheet onto which the image carrier transfers the image to a transfer position; a sheet feed roller that conveys the recording sheet toward the register roller; and a conveyance control unit that conveys the recording sheet to the transfer position at a right timing with the image formed on the image carrier by driving the sheet feed roller and the register roller in accordance with a series of control operations, wherein the conveyance control unit controls rotation-start timings of the register roller and the sheet feed roller in such a manner that the recording sheet is conveyed, by exclusively driving the sheet feed roller at a specific rotation-start timing, stopping the sheet feed roller at a specific stop timing after the specific rotation-start timing and causing the sheet feed roller to remain stopped for a specific time period to allow the recording sheet to be, at an end of said specific time period, in a state of being resiliently flexed against the register roller, driving the sheet feed roller to start rotation again after the end of said specific time period and at the right timing with the image formed on the image carrier, and after the sheet feed roller starts rotation again, driving the register roller at a rotation-start timing of the register roller at a time of starting a registering process to convey the recording sheet to the transfer position.