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:
Aug. 19, 2008
Filed:
Jul. 27, 2001
John H. Schneider, Frankfort, IL (US);
John H. Schneider, Frankfort, IL (US);
Illinois Tool Works Inc., Glenview, IL (US);
Abstract
The method of forming a tamper-evident plastic bag or similar container includes providing a zipper with interlocking first and second profiles with respective first and second flanges. The second flange is longer than the first flange. A distal portion (with respect to the interlocking elements of the profiles) of the second flange is sealed to the web thereby forming a transport seal to carry the zipper with the web through a form, fill and seal machine. At the form fill and seal machine hard seals are formed between the web and the first flange and a proximal portion of the second flange. The transport seal is a peel seal or alternatively the second flange is formed with a frangible section between the distal and proximal portions and the transport seal is a hard seal. In both cases the second flange provides tamper evidence and/or a hermetic barrier for the completed bag.