Patent ID: 8282092

Claim:
An image forming apparatus comprising: a sheet conveying path that conveys sheets, which are fed from paper feeding cassettes in plural stages by paper feeding rollers, to registration rollers with conveying rollers corresponding to the respective paper feeding cassettes and conveys the sheets to a printing position with the registration rollers; a variable-speed registration motor that drives the registration rollers; conveyance motors that drive the respective conveying rollers, at least some of which, including those that drive conveying rollers of an upper stage side paper feeding cassette, are variable-speed conveyance motors; paper feeding motors that drive the paper feeding rollers; and a control unit that performs driving control for the registration motor, the conveyance motors, and the paper feeding motors, and varies conveying speed of the sheets conveyed to the registration rollers according to a sheet size of a sheet to be fed and a stage position of the paper feeding cassette selected from the paper feeding cassettes.