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:
Feb. 22, 1994
Filed:
Jan. 14, 1993
Shigeaki Yamanashi, Yokohama, JP;
Toyo Saikan Kaisha, Ltd., Tokyo, JP;
Abstract
A curl forming method for a can end which enables satisfactory curl formation in a thin can end without occurrence of wrinkles and without occurrence of scratches on internal surfaces of the can end and which can make a can end thinner. A punched can end is pressed and bended from an open end of annular flange and an opposite side by a primary forming die having an inner diameter larger than a final curl diameter by 0 to 2.0 mm to effect a primary forming, and then it is pressed and bended from the side of the flange open end by a secondary forming punch having a forming surface 14 having a final shape of a curl.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile