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:
Dec. 06, 1988
Filed:
Oct. 28, 1985
John L Wesley, Wayne, NJ (US);
Henry H George, Jr, Westfield, NJ (US);
Hoechst Celanese Corporation, Somerville, NJ (US);
Abstract
Improved melt spinning of friable, thermally sensitive organosilicon preceramic polymers is obtained by using externally-metered feed means for continuous feeding of the polymer to an extruder. Starve feeding by metering the feed at a rate less than that required to fill the feed screw flights prevents pulverizing and compaction of the friable polymer, leading to cross-linking of trapped polymer and solid plugging, which would cause the extruder to bind and cease to function. Metered feed can be obtained by either monitoring of screw loading or discharge pressure and adjustment of hopper feed rate or control based upon measured values of extruder speed or metering pump speed.