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:
Aug. 31, 1982
Filed:
Nov. 03, 1980
Roger G Teumer, Fairport, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A liquid drop (i.e. ink jet) printing system is disclosed of the type wherein many parallel drop streams are continuously generated. Selected drops from each stream are deflected laterally to address the multiple pixels of a segment of a raster image scan line. The scan line segments addressed by each stream collectively compose a full scan line of a raster image. The drops are deflected by electrostatic fields tilted relative to the scan line to compensate for drop placement errors due to the relative motion between a target and the drop generator. The tilted fields are created in the spaces between interleaved teeth of two electrode members resembling garden rakes. The teeth are triangular, in cross-section at least partially, to tilt the fields. In addition, a drop collection gutter is positioned adjacent each tooth of one of the rake members. The gutter collects drops from adjacent streams not intended for marking a target. The drops within adjacent streams are swept in opposite directions. The alternately tilted (clockwise and counterclockwise) deflection fields and the appropriate sweep direction are selected for a given target direction of travel. The rake members move apart during start up and shut down of the drop streams.