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. 17, 1978
Filed:
Sep. 20, 1976
Applicant:
Inventors:
Pierre Cougoul, Saint Medard en Jalles, FR;
Marc Saunier, Saint Medard en Jalles, FR;
Jean Lucien Tranchant, Vert le Petit, FR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C06B / ;
U.S. Cl.
CPC ...
264 / ; 149 96 ; 264 / ;
Abstract
Screw extruder and process utilizing same for the production of extrusions formed of compositions based on plasticized nitrocellulose. Process comprises at least one sequence of the following main operations carried out in corresponding zones in the extruder: (i) mixing and shearing the constituents of the composition to effect gelatinization thereof; (ii) retarding the forward movement of the composition by throttling; and (iii) drying the gelatinized composition by evaporation under a reduced pressure prior to extrusion of the composition from the outlet die of the extruder.