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. 03, 1998
Filed:
Sep. 04, 1997
Applicant:
Inventor:
David Harvey, Oxon, GB;
Assignee:
Crown Cork & Seal Technologies Corporation, Alsip, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72 58 ; 72 62 ;
Abstract
A method and apparatus for the reshaping of containers is described. A mold having at least three parts is used to hold the container blank. Pressurized air supplied to the cavity of the container causes it to expand to take on the shape of the mold chamber. Whilst this operation is taking place, the mold parts move towards each other under the action of pistons which load both ends of the mold and container, thus preventing longitudinal tension in the container wall. The mold parts are initially spaced from each other by gaps or split lines which are reduced by the movement of the mold parts towards each other but are never completely closed up.