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:
Apr. 16, 1991
Filed:
Oct. 23, 1989
Applicant:
Inventors:
Helmut Kaeufer, Mettmann, DE;
Christian Kipfelsberger, Hepberg, DE;
Karl-Heinz Leyrer, Bobfingen, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B29C / ;
U.S. Cl.
CPC ...
264230 ; 264296 ; 264325 ; 264345 ;
Abstract
A method and apparatus forms a plastic part having a shape memory which has been formed to a second shape from an initial shape by the application of pressure to cause molecular orientations which are subsequently fixed by being cooled to a desired temperature and, when subjected to subsequent energy such as heating, will eliminate the molecular orientation and create a restoring force to return the part to the initial shape.