Claims
- 1. A sealed container comprising a flexible sheet material closing off the interior of the container from the ambient atmosphere, said sheet material being resistant to tearing, said container having an opposed pair of walls formed by said sheet material, each of said walls including an inner surface and an outer surface, said container comprising a releaseably sealed mouth portion formed between said walls and of a predetermined length, each of said walls including a first layer on said entire inner surface, said first layer comprising at least two plastic material layers permanently adhered to each other, a portion of one of said first layers at said mouth portion on one of said walls being disposed opposite to a corresponding portion of the first layers at said mouth of the other of said walls, said mouth portion being sealed by the application of a predetermined amount of energy thereto, whereupon portions of the same plastic layer of each of said first layers join in releaseable engagement with each other to form an air-tight interfacial seal therebetween for the entire predetermined length of said mouth portion, said interfacial seal being readily openable by peeling said engaging portions of said first layers from each other to provide ready access to the interior of said container through said mouth portion without tearing said sheet material, said container additionally comprising at least one permanently sealed seam formed by the application of energy in excess of said predetermined amount to other abutting portions of said first layers of said walls.
- 2. The container of claim 1 wherein one of said layers comprises a blend of polyethylene and ionomer.
- 3. The container of claim 2 wherein said first layer comprises a layer of polyethylene and a layer of said blend of polyethylene and ionomer.
- 4. The container of claim 1 wherein said releaseable seal of said layers at said mouth is formed by a heat seal therebetween.
- 5. The container of claim 4 wherein said permanently sealed seam is formed by a heat seal.
BACKGROUND OF THE INVENTION
This application is a continuation-in-part of my co-pending U.S. patent application Ser. No. 496,770 filed on May 20, 1983, now U.S. Pat. No. 4,518,087 entitled Sealed Flexible Container with Non-Destructive Peelable Opening, whose disclosure is incorporated by reference herein.
US Referenced Citations (11)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
496770 |
May 1983 |
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