Patent Number: 6,254,078

Title: Automatic document feeder for an image forming apparatus

Abstract: An ADF (Automatic Document Feeder) for an image forming apparatus includes a drive roller and a driven roller constituting document send-out means located downstream of a contact glass for sending out a document. The driven roller is movable into and out of contact with the drive roller. The driven roller is spaced from the drive roller when a document sensor does not sense the arrival of the leading edge of the document at the document send-out means. When the document sensor senses the leading edge of the document, the driven roller is moved toward the drive roller in order to convey the document in cooperation with the drive roller. The ADF insures accurate reading of the document without varying the document conveying speed at an image reading position.

Inventors: Taruki; Takashi (Kanagawa, JP)

Assignee: Ricoh Company, Ltd.

International Classification: G03G 15/00 (20060101); H04N 1/00 (20060101); H04N 1/193 (20060101); H04N 1/191 (20060101); H04N 1/12 (20060101); B65H 005/22 ()

Expiration Date: 07/03/2018