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:
Oct. 27, 1981
Filed:
May. 29, 1980
An Wang, Lincoln, MA (US);
Wang Laboratories, Inc., Lowell, MA (US);
Abstract
An impact printer head mechanism for printing on a print medium has a cylindrical print head with its axis perpendicular to the print line and a matrix of characters on its exterior surface in the form of a multi-turn helical row. A rotatably fixed screw thread cooperating with an internal screw thread on the print head is provided for supporting the print head for rotational and axial movement. A print head drive, including a gear cooperating with a spline on the print head, is provided for rotating the print head to simultaneously rotatably and axially move it to position a desired character relative to the print line. Operating means is provided for moving the print head relatively to the printing medium to cause a selected character to be printed.