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:
Aug. 22, 1978
Filed:
May. 27, 1976
Frank Henning Blitchington, Richmond, VA (US);
George David Hudson, Richmond, VA (US);
Western Electric Company, Inc., New York, NY (US);
Abstract
A continuous flexible web includes a flat flexible insulation substrate, copper cladding on at least one major surface of the substrate and a film of photoresist material adhesively bonded longitudinally to the copper cladding. Prepunched holes are formed in and through the web to ultimately provide through-hole connections between printed circuits formed on opposite sides of the substrate. Successive sections of the web are indexed through an apparatus where the sections are positioned adjacent to a circuit pattern master and exposed to resist-developing ultraviolet rays. A photocell system cooperates with through-slots formed selectively in the web to precisely align the web sections with the circuit pattern master prior to exposure to the ultraviolet rays.