Method for reducing the variance in the forces needed to open reclosable plastic bags from within and from without
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 24, 1996
Issued Date -
N/A
app pub date -
Nov 10, 1994
filing date -
Dec 28, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method for substantially reducing the variance in results obtained in pull tests on reclosable plastic bags, wherein the forces needed to open the bags from within and from without are measured and compared, by controlling the attachment point of the bag wall to the base of the zipper profile requires the use of selectively placed preferential seal areas. These seal areas are provided by disposing an interlayer between each profile and its respective bag wall. The interlayers include a strip of material having a lower melting point than those of the profiles and the bag walls and having a preselected width greater than any possible lateral displacement, or 'float', of the profiles that may occur in the sealing apparatus. Where the strip does not take up the entire width of the interlayer, it has a preselected, constant width and runs parallel to the zipper profiles. The lower melting point of the material of the strip, and the width of the strip, ensure that the seal location on the profiles remains fixed.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully