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. 30, 1979
Filed:
Mar. 27, 1978
Applicant:
Inventors:
Johan M Beijen, Amsterdam, NL;
Jacques G Du Chatinier, Amsterdam, NL;
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264550 ;
Abstract
The method of forming thin-walled cupped articles from unpigmented polypropylene sheet by plug-assisted fluid pressure forming of the sheet at a temperature 4.degree. to 15.degree. C. below its melting point is known to produce clear, oriented articles of good impact strength. The low temperature impact strength of these articles can be significantly improved with little or no sacrifice of clarity by making them from sheet produced from a blend of a crystalline propylene polymer with from 1 to 30% of low density polyethylene.