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US 4,787,754 AGranted
Reclosable flexible bags having fastener profiles attached to exterior walls thereof and a method of making same
AssigneeMobil Oil Corporation
InventorFox J. Herrington
Life of this patent
Estimating the term…
Abstract
This invention provides a reclosable flexible bag having a tape of greater thickness around its opening portion. On the surfaces of the tape facing the bag, fastener profiles are provided to seal the bag by pinching the bag walls therebetween.
Claims13
A reclosable flexible bag comprising:
- a pouch having front and back walls and a pouch opening at the upper edge thereof;
- a first fastener profile comprising a first tape having first and second edges and a protrusion disposed along the first edge and extending from the surface of the tape;
- a second fastener profile comprising a second tape having first and second edges and a substantially C-shaped member disposed along the first edge and extending from the surface of the tape;
- the second edges of the first and second tapes being affixed to the exterior of the walls of the pouch and parallel to the pouch opening so that upon closing, the protrusion and C-shaped members interlock, with the front and back walls being interposed therebetween.
1 more element
A method of manufacturing a plurality of reclosable flexible bags comprising:
- advancing a double web of thermoplastic film material having a first wall and a second wall;
- advancing a first fastener profile into proximity with the top portion of the exterior of the first wall, the first fastener profile comprising a first tape having first and second edges and a protrusion disposed along the first edge and extending from the surface thereof;
- advancing a second fastener profile into proximity with the top portion of the exterior of the second wall, the second fastener profile comprising a second tape having first and second edges and a substantially C-shaped member disposed along the first edge and extending from the surface thereof;
- affixing the second edges of the first and second tapes to the upper edge of the double web so that when the fastener profiles interlock, the first and second walls are interposed therebetween;
- sealing transversely across the web at intervals to form a pluraltiy of interconnected bags.
2 more elements
Dependencies are inferred from the claim text.