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. 07, 1986
Filed:
Mar. 18, 1985
Frank H Bell, Logan, UT (US);
Morton Thiokol, Inc., Chicago, IL (US);
Abstract
A roll calendered sheet propellant features thin sheets of solid propellant which have been consolidated by the calendering operation. After calendering, the sheet propellant is roll-printed or 'coined' with a pattern, which forms propellant flakes after ignition in a gun/cannon system. The printed pattern consists of a designed flake geometry, for example, of contiguous diamond or square shapes providing flame communicating paths therebetween. The formation of propellant flakes depends upon a characteristic of propellants, specifically that they burn faster in zones of high residual stress. By varying the design of the roll printer, the printed pattern, in a two-sided printed sheet configuration, may include a cut in the pattern of the order of 15 to 40% of the propellant sheet uncut web depth. After roll printing, the propellant may be cut to length and rolled for insertion into a shell or cartridge case.