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:
Nov. 05, 1996
Filed:
Apr. 26, 1995
Applicant:
Inventors:
Bangshu Cao, Chapel Hill, NC (US);
Thomas A Shepard, Apex, NC (US);
Assignee:
Becton, Dickinson and Company, Franklin Lakes, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; F16L / ;
U.S. Cl.
CPC ...
428 357 ; 428 3691 ; 428215 ; 428910 ; 138137 ; 138141 ; 138D / ; 128767 ; 604187 ; 26432812 ;
Abstract
A molding process includes flowing a polymer melt into the cavity of a mold which includes a core pin. After the mold is filled and skin layers of solidified polymer have formed adjacent the mold wall and core pin wall, the core pin is spun transversely to the direction of polymer melt flow. The invention includes hollow articles of improved mechanical properties made by the process.