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:
Jun. 20, 1989
Filed:
Feb. 17, 1988
Robert J Pavone, South Windsor, CT (US);
Bruce L Davidson, East Hartford, CT (US);
Henry F Berdat, Manchester, CT (US);
The Gerber Scientific Instrument Company, South Windsor, CT (US);
Abstract
An indexing system for selectively orienting one of a series of arcuately oriented different sized and/or shaped apertures formed around an aperture disc used in a photohead for exposing upon a photosensitive surface detailed graphic information using a light beam. The aperture disc has formed thereon, equidistantly spaced indicators in the form of slots allowing radiant energy generated by a light emitter to impede upon and energize a split cell photosensitive detector. A control system rotates an aperture wheel to a next selected position at a first volocity until a selected aperture is within the vicinity of the next selected position and subsequently rotates the aperture disc at a second slower velocity to precisely position the next selected position in registry with the light beam. A method for creating the aperture disc includes inscribing with a light beam upon a film, the pattern of the apertures and the indicators, developing the film as a master and contact printing copies of the images formed on the master.