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. 17, 1981
Filed:
Dec. 28, 1979
Stanley E Rose, Phoenix, AZ (US);
Robert G Fulks, Phoenix, AZ (US);
Genrad, Inc., Concord, MA (US);
Abstract
A high speed print head system includes a print head pivotally and resiliently coupled to a frame which is laterally movable on a carriage system. The print head includes an elongated nose piece having therein a plurality of print rods which can be controllably forced beyond the end of the nose piece to impact a ribbon and paper supported by a platen to produce dots on the paper. The pivotal and resilient coupling is achieved by means of a flexure having first and second opposed connection points connected to the frame and third and fourth opposed connection points connected to the print head. Two permanent magnets are rigidly attached to the frame substantially above the axis of the elongated nose piece and substantially symmetrically with respect to the elongated nose piece. A pair of electromagnets rigidly attached to the print head opposite the respective permanent magnets are controllably energized to produce continuously variable forces between the frame and the print head. The continuously variable forces produce continuously variable pivoting of the print head about its neutral position, whereby high resolution character printing can be effected with a minimum dot overlap, and consequently with a minimum number of dot printing operations.