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, 1981
Filed:
Nov. 21, 1979
Milburn H Kane, III, Round Rock, TX (US);
Thomas M Paulson, Lexington, KY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Erase apparatus for a typewriter utilizes a special double strike technique to permit quality erasures at normal character overstrike accuracies. The unwanted character is overstruck first slightly to one side and then slightly to the other side in the escapement direction. A preferred range to achieve apparently complete erasures occurs at sideshift distances between two and twenty percent of an average character escapement. In a presently preferred implementation, position codes are produced which cause the normal typewriter escapement apparatus to move the type carrier to the special striking positions for erasing.