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:
Oct. 02, 2012
Filed:
Oct. 01, 2008
Applicants:
Michael C. Borwig, Swisher, IA (US);
John Welty, Walford, IA (US);
Inventors:
Michael C. Borwig, Swisher, IA (US);
John Welty, Walford, IA (US);
Assignee:
Mestek Machinery, Inc., Westfield, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 11/00 (2006.01); B21D 51/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
A ductmaking apparatus bends a metal web to form a duct blank having a lock seam with male and female portions. Prior to shearing off the duct blank, the apparatus bends the web to form a lock tab that secures the lock seam during subsequent handling of the duct blank.