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. 18, 1980
Filed:
May. 29, 1979
Applicant:
Inventor:
William G Atkinson, London, CA;
Assignee:
Somerville Belkin Industries Limited, London, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ; B32B / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
428 80 ; 427285 ; 427288 ; 427401 ; 428542 ; 428194 ;
Abstract
A tearing edge is formed at an edge of a paperboard blank according to the present invention by arranging a plurality of paperboard blanks in a stack with the edges which are to be reinforced disposed in a common plane and applying a clamping force to the stack of blanks and applying to the edges which are to be reinforced a coating fluid of a type which is at least semi-rigid when set and allowing the coating to set to form a rigidifying edge and thereafter releasing the clamping force to permit separation of the blanks from the stack.