Patent ID: 8676065

Claim:
An image forming apparatus including a plurality of option cassettes, the image forming apparatus comprising: an image forming apparatus paper jam sensor unit to sense whether a paper jam occurs in the image forming apparatus; an option cassette paper jam sensor unit to sense whether the paper jam occurred in the at least one option cassette; a motor unit to stop driving the image forming apparatus and the plurality of option cassettes, when the paper jam is detected by the image forming apparatus paper jam sensor unit; and a control unit to leave a paper sheet on a transfer path of the plurality of option cassettes as is and to remove only a paper sheet jammed within the image forming apparatus, after the paper jam is detected by the image forming apparatus paper jam sensor unit; and a printing unit to resume printing starting from the paper sheet on the transfer path of the plurality of option cassettes if the paper sheet on the transfer path of the plurality of option cassettes is sensed by the option cassette paper jam sensor unit after the paper sheet jammed in the image forming apparatus is removed; wherein the control unit operates a motor to drive the image forming apparatus to remove the paper sheet jammed within the image forming apparatus while a motor to feed paper from the option cassettes is not operational after a door for the image forming apparatus has been opened and closed; wherein when the paper sheet jammed in the image forming apparatus is detected by the image forming apparatus paper jam sensor unit, only the paper sheet jammed in the image forming apparatus is removed by the motor unit, and the paper sheet on the transfer path of the plurality of option cassettes is used for printing by the printing unit, not to be removed.