The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 13, 2008
Filed:
Jun. 10, 2004
Kazuo Ueda, Fukushima-ken, JP;
Hisashi Takahashi, Fukushima-ken, JP;
Hideshi Takahashi, Fukushima-ken, JP;
Yuji Inada, Fukushima-ken, JP;
Kazuo Ueda, Fukushima-ken, JP;
Hisashi Takahashi, Fukushima-ken, JP;
Hideshi Takahashi, Fukushima-ken, JP;
Yuji Inada, Fukushima-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
Projections 4-formed on a circumferential surface of a roller portion of the sheet feed roller comprise straight grain projections whose projecting direction faces to the rotation direction of the roller portion, and reverse grain projections that are formed in a direction opposite to the surfaces of the straight grain projections. The straight grain projections are formed so as to be adjacent to each other in the axial direction of the roller portion, that is, in the direction of arrow B and are also formed in two or more rows in the circumferential direction of the roller portion, that is, in the direction of arrow A. The reverse grain projections are formed so as to be adjacent to each other in the axial direction of the straight grain projections and are also formed in the circumferential direction.