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:
Oct. 31, 1995
Filed:
May. 03, 1994
Keng S Chia, Singapore, SG;
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A sheet advancement system is provided which includes a roller arrangement having first and second rollers coupled to afford selected in-phase and out-of-phase relative rotational orientation thereof. Each roller includes a periphery with gripping and non-gripping surface regions, the gripping surface regions being configured to rotationally engage a sheet and the non-gripping surface regions being configured to clear the sheet. The rollers thus are joined in either a grip orientation wherein substantially continuous roller-directed sheet advancement is accommodated, or a pass orientation wherein the rollers permit unobstructed passage of the sheet. In the grip orientation, the rollers are out of phase, providing substantially continuous gripping region engagement of the sheet. In the pass orientation, the rollers are in phase, allowing for rotational adjustment of the rollers such that the non-gripping regions (or pass regions) of the rollers may be arranged to face the sheet so as to allow the sheet to pass beneath the rollers without roller drag.