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US 6,572,267 B1Granted
Gussetted packages
AssigneesSealstrip Corporation, SIG Pack, Inc.
InventorHarold M. Forman
Life of this patent
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AssigneesSealstrip Corporation, SIG Pack, Inc.
InventorHarold M. Forman
Estimating the term…
Gussetted packages having openable and reclosable interlocking seals, the seals having male and female portions, snap detents, and formed transversely to the direction of film flow. The packaging film is provided at package length intervals with thermoformable strips secured thereto transversely to the running length of the film, and is fed to a modified standard vertical form, fill and seal packaging machine with gussets forming tooling where the film is formed into a bag with the thermoformable strips inside at the upper end of the bag, product deposited into the bag, the bag sealed, the reclosable interlocking seal formed, and the bag severed from the next bag being formed. The reclosable seal provides auditory and tactile indications of seal closing. Some packages are formed with the thermoformable strips in the gusset, and some are formed with the gusset free of strip material.
In a flexible gussetted package formed from a continuous web of substantially constant thickness packaging material characterized by having front and rear faces and at least one gussetted side extending between said front and rear faces, a repeatably openable and reclosable interlocking seal operative to open and close said package body to provide and prevent respectively access to the package interior, said reclosable interlocking seal extending through said front and rear faces and at least one gussetted side of said package and comprising in combination, inner and outer interlocking portions, the inner and outer portions of said seal in at least said front and rear faces of said package each comprising one thickness of said flexible packaging material secured to one thickness of at least one discrete strip of substantially constant thickness flexible material, said at least one strip having length and width, said strip width defining the strip ends, said strip length having top and bottom edges and being greater than said strip width, said at least one strip being secured to said packaging material along the strip top edge and being substantially unsecured along its bottom edge.
A flexible gussetted package formed from at least one thickness of a continuous web of substantially constant thickness flexible packaging material and at least one discrete strip of substantially constant thickness flexible material, having a closed body with opposite ends and at least one package body end seal, characterized by,
Dependencies are inferred from the claim text.