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:
Nov. 23, 1993
Filed:
May. 20, 1991
Denis J Stemmle, Webster, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A scanner has a frame assembly containing a carriage movably mounted in the frame assembly for scanning movement in a scanning path in a first direction along the length of the frame assembly, which includes at least one sheet transport path and a roll to index a sheet through the path in a direction transverse to the first direction. The scanning carriage is driven in the scanning path by a lead screw rotatably engaged with the scanning carriage for scanning movement along the length of the lead screw and a reversible motor. In a preferred embodiment the scanning carriage supports a reading head and/or a printing head for reading an image on a document and printing an image on a copy sheet and the pitch of the threads of the lead screw are selected so than an integer multiple of steps of a stepper motor provides a linear displacement of the carriage of one pixel width and a clock pulse generator simultaneously drives the stepper motor and the reading and/or printing heads.