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:
Jul. 10, 2001
Filed:
Jul. 05, 2000
Woo-yong Park, Suwon, KR;
Min-soo Lee, Euiwang, KR;
SamSung Electronics Co., Ltd., Suwon, KR;
Abstract
A transfer jam detecting apparatus for a wet type electrophotographic color printer capable of detecting various kinds of jams occurring at a transfer roller, including: a printed matter entrance sensor disposed on a front side of a transfer roll, for detecting an entrance of a printed matter into the transfer roll; a feed roll disposed by a shaft to be rotated in either direction on a transfer section printed matter guide disposed on a rear side of the transfer roll, the feed roll being passively rotated by the conveyed printed matter; a pressing roll assembly disposed on an upper portion of the feed roll, for pressing the printed matter in a manner that the feed roll is passively rotated by the conveyed printed matter; and feed roll rotational direction detecting section for detecting the presence of a jam by detecting the rotation and rotational direction of the feed roll. The feed roll rotational direction detecting section includes a rotational plate disposed on the shaft of the feed roll, and having a plurality of sensing holes; and a sensor disposed to receive the sensing holes of the rotational plate, for detecting the rotation and rotational direction of the rotational plate. Accordingly, all kinds of jams occurring at the transfer roll can be detected, precisely, and operation of the printer can be timely stopped. Since the kind of the jam is clearly indicated to a user, the user is enabled to prevent serious error in the related parts of the printer which is caused due to a wrap jam, and to remove the wrap-jammed printed matter easily.