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:
Jul. 02, 1991
Filed:
Jan. 12, 1990
Applicant:
Inventors:
Michael J McMahon, Palatine, IL (US);
Hugo Boeckmann, Arlington Heights, IL (US);
Assignee:
Illinois Tool Works, Inc., Glenview, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65B / ; B65B / ; B31B / ;
U.S. Cl.
CPC ...
53451 ; 531333 ; 533891 ; 53412 ; 53551 ; 226179 ; 493214 ;
Abstract
A method and a mechanism for making plastic film bags having a reclosable zipper including wrapping a continuous supply of film over a forming tube to form a seam joining the edges of the film and cross-seaming the film, supporting the supply roll of film with the film doubled and a zipper at the doubled edge; guiding the location of the zipper in the film so that the film is properly positioned as it is fed forwardly to be wrapped over the forming tube and means unfolding the film as it is fed forwardly to open the doubled film to be fed to the forming tube as a flat sheet.