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:
Jul. 03, 1984
Filed:
Mar. 15, 1982
Applicant:
Inventor:
William Witkowski, Harborcreek, PA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A63B / ; B29D / ;
U.S. Cl.
CPC ...
273 / ; 264 451 ; 264D / ;
Abstract
An injection molded bowling pin with a core of thermoplastic plus a blowing agent and a solid skin of thermoplastic per se injected into the mold at one and the same time. The bowling pin is molded by a process wherein a foam material for forming the core is surrounded by and in contact with a nonfoam material and both materials are simultaneously injected into a mold cavity having the shape of a bowling pin. The skin and core may be of the same or of different thermoplastic. The bowling pin is a unitary structure of superior strength and finish with the foamed core and solid skin fused together.