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:
Jan. 18, 1977
Filed:
Jul. 30, 1974
Andre Herz, Nesles-la-Vallee, FR;
Minigrip, Inc., Orangeburg, NY (US);
Abstract
A method for making tubular plastic material having shaped interlocking profiles thereon for use in reclosable bags by cross-cutting and sealing the material to form the individual bags. The tubular material is made in different diameters of tubes to form bags of different depths, and the speed of delivery of the plastic material and the rate of inflation and delfation is controlled to determine the diameter of the tubing, while the plastic delivery to the profile portion of the die is separately controlled and maintained at a rate, so that, for different sizes and gauges of tubing, the profile will be maintained constant thereby obtaining a profile of optimum size and providing for bags which can be varied in size, but which can each accommodate the same closing and opening slider which fits over the profiles. This method of extruding profile tubes requires fewer changes in extrusion dies.