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:
Dec. 29, 1998
Filed:
Jul. 21, 1997
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
Embodiments of a material-moving electrophotography roller are shown and described, each embodiment having an outer surface having ridges. The ridges may extend in right-handed or left-handed orientation, or in other angled (non-radial and non-horizontal) manner. The ridges lie in such a pattern so that the ridges move material radially over the roller or against a restrictive surface, and so that there are no gaps in the contact between the ridges and the material or the restrictive surface during a revolution of the roller. The roller is preferably made of a shaft covered by a sleeve or tube of non-disintegrating material with external ridges. The ridged tube is twisted and secured to the shaft so that the ridges run preferably and substantially at a 45.degree.-75.degree. angle from perpendicular to the roller axis. Alternatively, a monofilament line or other non-disintegrating cord may be wrapped and secured around a cylinder to create the ridges and troughs necessary for material movement and for distribution of the time of engagement of the ridges on material or surfaces.