US 7,320,465 B2
Paper feeding unit and image forming apparatus using the same
In-sik Seo, Suwon-si (Korea, Republic of); and Yong-whan Park, Suwon-si (Korea, Republic of)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (Korea, Republic of)
Filed on Feb. 02, 2005, as Appl. No. 11/47,587.
Claims priority of application No. 10-2004-0041263 (KR), filed on Jun. 07, 2004.
Prior Publication US 2005/0269760 A1, Dec. 08, 2005
Int. Cl. B65H 3/06 (2006.01)
U.S. Cl. 271—119  [271/121; 271/266; 271/273] 18 Claims
OG exemplary drawing
 
7. An image forming apparatus, comprising:
a paper feeding cassette to accommodate paper;
a paper feeding unit to separate the paper from the paper feeding cassette into individual sheets of paper and to feed an individual sheet of paper;
a developing unit to form a predetermined toner image and to transcribe the toner image on the paper fed by the paper feeding unit;
a fixing unit to fuse and fix the toner image transcribed on the paper; and
a paper discharge unit to eject the paper printed with an image,
wherein the paper feeding unit includes:
a pickup roller to pick up paper accommodated in a paper feeding cassette;
a first feed roller to feed the picked up paper in a required direction; and
a reverse roller to prevent a plurality of sheets of paper from being fed by rotating in an opposite direction to a rotation direction of the first feed roller and to separate the paper into individual sheets of paper,
wherein the first feed roller comprises a contact section to contact the reverse roller to feed and separate paper and a planar non-contact section to cause the first feed roller to be separated from the reverse roller and the paper, and wherein the first feed roller feeds the paper by making a one-time rotation at a paper entering time point between the first feed roller and reverse roller and stops rotating with the planar non-contact section facing the reverse roller and goes into a waiting mode with the reverse roller separated from the first feed roller.