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:
Sep. 09, 1997
Filed:
Feb. 02, 1996
Hiroyuki Nagatani, Tokyo, JP;
Isamu Nakabayashi, Kanagawa, JP;
NEC Corporation, Tokyo, JP;
Abstract
A sheet feed mechanism includes first, second, and third feed rollers, first and second servo motors, a reverse roller, a torque limiter, a pick-up roller, and a plurality of photoelectric sensors. The first, second, and third feed rollers are respectively mounted on a feed path of sheets including mail pieces, on an upstream side of the first feed roller in the feed direction, and on the upstream side of the second feed roller in the feed direction, and are respectively rotated by the one-way clutches in only a feed direction. The first and second servo motors respectively drive the first and second feed rollers, and the second feed roller independently. The reverse roller is pressed against by the first feed roller through the feed path, and is driven to rotate in a counter feed direction. The torque limiter constantly applies a predetermined driving torque to the reverse roller in the counter feed direction. The pick-up roller is arranged on a downstream side of the first feed roller in the feed direction, and is constantly rotated to feed the sheet to a downstream transport path. The plurality of photoelectric sensors are sequentially arranged on the feed path between the first feed roller and the pick-up roller.