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:
Sep. 06, 1988
Filed:
Nov. 07, 1986
Applicant:
Inventor:
Philip P Su, Greenville, SC (US);
Assignee:
W. R. Grace & Co., Cryovac Div., Duncan, SC (US);
Primary Examiner:
Int. Cl.
CPC ...
B65B / ; B32B / ;
U.S. Cl.
CPC ...
83170 ; 83695 ; 53552 ; 53373 ; 53133 ; 493470 ; 493930 ;
Abstract
A bag and a method and apparatus for forming an easy open bag in a vertical form-fill-seal process wherein a bag is formed from a sheet of thermoplastic film and a heat seal betwee bags as they are filled serves as the top closure for the lower bag and a bottom closure for the upper bag, the easy open feature being provided by easy tear slots which are cut at acute angles in both the bottom seal of a bag and the top so that an opening corner of the bag may be torn in either the top or bottom of the bag.