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:
Dec. 24, 2002
Filed:
Feb. 09, 2001
Applicant:
Inventor:
Sven Melker Nilsson, Kållered, SE;
Assignee:
Kemira Metalkat Oy, , FI;
Primary Examiner:
Int. Cl.
CPC ...
B32B 3/28 ; B21D 1/310 ; B01J 3/504 ; F01N 3/28 ;
U.S. Cl.
CPC ...
B32B 3/28 ; B21D 1/310 ; B01J 3/504 ; F01N 3/28 ;
Abstract
A method for corrugating a metal foil ( ), which together with a longitudinally flat foil ( ) is intended to form a foil package pervious to liquid or gas, where the folds are made with a very small fold radius by rolling in at least two steps between rollers ( ) disposed in pairs, the fold radius ( ) being large and the fold height ( ) low in a first step, and after the final step, the fold radius ( ) is less than 10%, preferably 2 to 5% of the fold distance ( ), and the fold height ( ) is greater than after the first step.