Patent Number: 7,648,134

Title: Paper supply device and image forming apparatus having the same

Abstract: A paper supply device and an image forming apparatus, capable of always maintaining a constant pickup force regardless of the amount of loaded sheets of paper. The paper supply device includes a paper supply cassette, a pickup unit to pick up the paper, a paper supply plate and a press spring to bias the paper toward the pickup unit, a first restraining device to restrain the paper supply plate and to release the restraint of the paper supply plate, a second restraining device to permit the pickup unit to move vertically when the pickup unit picks up the paper and restricts the vertical movement of the pickup unit when the pickup unit does not pick up the paper, and an elastic member to bias the pickup unit toward the paper to provide the pickup unit with a pickup force when the pickup unit picks up the paper.

Inventors: Lim; Kwang Taek (Gwangmyeong-si, KR)

Assignee: Samsung Electronics Co., Ltd.

International Classification: B65H 3/06 (20060101); B65H 1/08 (20060101)

Expiration Date: 1/19/12018