Ricoh Company, Ltd.

Motokazu Tamaoki

Hiroshi Kubo

Hitoshi Hattori

Hiroshi Fukano

An automatic document feeder includes a controller that compares an input original length that is received from a main operating unit and an actual original length that is calculated based on a detection result from a registration sensor arranged, on a conveying path, downstream of a separation feeding unit. The controller sets, when a result of the comparison indicates that the input original length and the actual original length are not equal, a larger value between the input original length and the actual original length as a jam determining value. The controller controls a jam detection based on the set jam determining value.

Automatic document feeder with jam determination control

A document feeder including an operation panel configured to receive a feed start signal and a mode of operation designation from an operator; a stacking device configured to hold a stack of documents; a sensor configured to sense the stack of documents set on the stacking device; a motor configured to raise a leading edge portion of the stack of documents to a preselected position; and a controller configured to start the motor at a time dependent on the mode of operation designated by the operator.

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Gifu, Japan

Motokazu Tamaoki