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:
Mar. 21, 1978
Filed:
Dec. 27, 1976
Joseph Po-Wah Ku, Foster City, CA (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A dot matrix printer including a single printhead having two columns of print wires, the wires in one column being used to print only odd numbered dot columns on a record member and the wires in the other column being used to print only even numbered dot columns on the record member. In one embodiment the wire columns are spaced apart a distance equal to an even number multiple of the space between two adjacent dot columns and the wires in each column are then energized alterntely as the printhead traverses the dot column positions. In another embodiment the wire columns are spaced apart an odd number multiple of the space between two adjacent dot columns and the wires in each column are then energized simultaneously as the printhead traverses the record member.