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:
Sep. 19, 1989
Filed:
Nov. 23, 1987
Applicant:
Inventors:
Peter Albrecht, Hamburg, DE;
Adolf Appel, Egestorf, DE;
Karl-Heinz Balkau, Oststeinbek, DE;
Claus Horwege, Hamburg, DE;
Wolfgang Reymann, Hamburg, DE;
Peter Rose, Potomac, MD (US);
Klaus Vogel, Barsbuttel, DE;
Walter Wiedenfeld, Hamburg, DE;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C / ; B29C / ; B29C / ;
U.S. Cl.
CPC ...
264521 ; 264296 ; 264322 ; 264534 ; 264573 ; 4253871 ; 425398 ; 425400 ; 425410 ; 425415 ; 425419 ; 425423 ;
Abstract
A process and an apparatus for forming a flange on the wall portion of a hollow body of thermoplastic material with an opening at one end provides that the end part of the wall portion which defines the opening is heated and contracted by means of a force acting on the end portion from the outside thereof over the periphery thereof, whereupon the contracted end part is subjected to a pressing operation to form a flange extending around the contracted end part.