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US 5,181,610 AGranted
Flexible container with nonstick interior
AssigneeInternational Paper Company
InventorsJames R. Quick, Robert L. Gordon
Life of this patent
Estimating the term…
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AssigneeInternational Paper Company
InventorsJames R. Quick, Robert L. Gordon
Estimating the term…
A pouch for the packaging of products having a pressure sensitive adhesive thereon, such as sanitary napkins. The pouch is formed of paper of plastic film coated on one side with a layer of silicone, the pouch construction being such that the silicone coating defines the interior surfaces of the pouch. Due to the nonstick characteristic of the silicone coating, the usual protective liner for the adhesive on the packaged product can be omitted. The side seams of the pouch are formed by the application of heat or ultrasonic energy in combination with mechanical deformation of the paper or film to produce embossments in the seam areas. The side seams may be comprised of two or three layers of material. The nature of these side seams may be such that the pouch may be opened by peeling apart the seams, or the seams may be sealed so tightly that the pouch can be opened only by tearing the material.
A pouch for the packaging of products having a pressure sensitive adhesive thereon, the pouch formed of at least one sheet having a silicone coating on a surface thereof, said silicone coating covering at least a portion of the interior surfaces of the pouch, the pouch having at least one edge seam which at least partially surrounds the interior of the pouch, said seam including the lamination of two overlapped edge zones, at least one said overlapped edge zone having a silicone coating, said edge seam including a plurality of discrete embossments, said embossments deforming both of said overlapped edge zones.
Dependencies are inferred from the claim text.