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:
Mar. 16, 1982
Filed:
Dec. 08, 1980
Applicant:
Inventor:
Thomas F Moran, Aurora, OH (US);
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264 406 ; 219311 ; 219438 ; 219441 ; 219328 ; 264295 ; 264322 ; 264339 ; 219439 ; 219530 ; 219535 ; 432 10 ;
Abstract
The method and apparatus disclosed herein provide a stratified heat bath for use in the heating stage of thermoplastic deformation. It allows for heating of central sections of the thermoplastic lengths in order to render said lengths susceptible to deformation without heating the end sections or tangents of said lengths, permitting the ends to retain their original shape. In the case of tubular lengths, such as lengths of PVC pipe, the invention provides for more rapid heating than in the prior art.