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:
Feb. 12, 1985
Filed:
Jul. 18, 1983
Andre C Bouchard, Peabody, MA (US);
Harold H Hall, Jr, Marblehead, MA (US);
GTE Products Corporation, Stamford, CT (US);
Abstract
A method of forming a protective coating on a glass envelope of a photoflash lamp. The method comprises the steps of orienting the lamp within a mold member such that the external surfaces of the lamp's glass envelope do not contact the internal surfaces of the mold, depositing a quantity of powdered thermoplastic or thermosetting resin within the mold such that the resin surrounds the entirety of the glass envelope's external surfaces, simultaneously applying pressure and heat to the powdered material to cause it to liquify, and thereafter cooling the liquified material to form a light-transmitting, solid polymer member having the glass envelope located therein. Pressures within the range of about 500 to 8000 pounds per square inch were possible without fracturing the glass envelopes or adversely effecting the components therein. The finished product is ideally suited as one component of a multilamp photoflash device for use with many of today's cameras.