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:
Apr. 18, 2000
Filed:
Aug. 21, 1998
Applicant:
Inventors:
Barry Gene Calvert, Covington, VA (US);
Richard Eric Nordgren, Daleville, VA (US);
Assignee:
Westvaco Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B65B / ;
U.S. Cl.
CPC ...
53300 ; 533293 ; 533294 ;
Abstract
Using induction heaters, two rotating metal bands are heated to a target temperature, continuously sensed by infrared temperature probes and then compressed on either side of a mated pair of paperboard carton flanges in an extended nip. The mated paperboard flange area is then heated by conduction from the metal bands to the activation temperature of the coating material to form a uniform bond between the paperboard surfaces.