Flexible bags – With closure – Rib and groove
Patent
1998-08-18
2000-03-07
Garbe, Stephen P.
Flexible bags
With closure
Rib and groove
24587, B65D 3324
Patent
active
060331135
ABSTRACT:
An improved zipper closure for plastic bags and other plastic containers is provided with fillets along uppermost and lowermost interlocking fingers of the zipper to prevent escape gaps from forming between the two sides of the zipper closure through which air or liquid would otherwise leak, especially at the bag's side seal locations. Conventional heat dies are used in combination with excess quantities of plastic material, either integrally formed, or, alternatively, co-extruded with, the zipper closure to form the fillets, thereby eliminating the need for use of a pressure differential-producing die to manufacture plastic bags without escape gaps.
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CTI Industries Corporation
Garbe Stephen P.
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