Method of making dual reuseable pouches
AssigneeZip-Pak Incorporated
InventorsDaniel P. McDonald, Donald L. Van Erden
Life of this patent
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Abstract
Dual flexible plastic pouches and a method of making the pouches where the pouches are reuseable and reclosable and have a double fastener strip arranged along the center between the pouches, the double strip is formed with a lower layer and upper pull flanges folded in from the edge of the lower layer with the pull flanges having reclosable rib and groove elements between the flanges and lower layer, an upper film web is juxtaposed over the lower web and bonded thereto over the peripheral edge to form pouches, the flanges are heat sealed to the upper web with a heat blocking thermal barrier between the flanges and lower layer of the fastener to prevent unintentional bonding.
Claims8
The method of making dual sealed reusable pouches for foodstuffs having a dual layer folded fastener strip having a continuous one-piece lower layer and a separated upper layer folded inwardly with interlocking fastener profiles for each pouch between the lower layer and upper layer comprising the steps:
- supplying a first lower foundation plastic film web of a size to form dual pouches;
- applying a dual plastic fastener strip having a continuous one-piece lower layer and a separated upper layer folded inwardly to form fastener pull flanges for each of the pouches;
- bonding the underside of the center of the lower layer of the fastener strip to the lower film web;
- applying a second upper plastic film web in juxtaposition over the lower layer and over the strip;
- and bonding an edge of the upper web to an edge of the lower web to form dual pouches and also bonding the upper web to the upper side of the strip layer along the center of the fastener strip so that dual pouches are formed separable by separating them along said center.
The method of making dual sealed reusable pouches for foodstuffs having a dual layer folded fastener strip having a continuous one-piece lower layer and a separated upper layer folded inwardly with interlocking fastener profiles for each pouch between the lower layer and upper layer comprising the steps:
- supplying a first lower foundation plastic film web of a size to form dual pouches;
- applying a dual plastic fastener strip having flange portions folded inwardly from the edge of the strip;
- bonding a lower layer of the fastener strip to the lower web;
- drawing the flanges away from the lower layer of the fastener strip to prevent inadvertent bonding thereto;
- applying a second upper plastic film web in juxtaposition over the lower layer and over the strip;
- and bonding an edge of the upper web to an edge of the lower web to form dual pouches and also bonding the upper web to the upper side of the strip layer along the center of the fastener strip so that dual pouches are formed separable by separating them along said center.
Dependencies are inferred from the claim text.