Sheet material

Details Sheet material Sheet material

1982-02-23

1985-05-07

Thibodeau, Paul J.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

229 87F, 229 35R, 383 42, 383113, 428137, 428182, 428211, 4283184, 428332, 428511, B32B 2710, B65D 6502

Patent

active

045158401

ABSTRACT:
A laminated wrapping sheet material comprising a layer of paper bonded to a layer of thermoplastic film, is formed such that a layer of paper of 15-35 gsm gauge is discontinuously bonded to a layer of thermoplastic film of 8-35 microns such that pockets of air are defined between the layers.
The sheet material is useful in the construction of a captive flap bag formed of a paper-thermoplastic film laminate and comprising two superimposed walls with thermoplastic film on the inside, closed at the bottom and on each of the two side edges, and open at the top edge, at least one wall having a reflex internal flap along the top edge sealed at each of the side edges, to define an internal inverted pocket, the two walls not being sealed to each other in the region of the pocket or pockets.

REFERENCES:
patent: 3365116 (1968-01-01), Ludlow
patent: 3505083 (1970-04-01), Schelhorn
patent: 4263360 (1981-04-01), Adelman
patent: 4264672 (1981-04-01), Taylor-Brown et al.

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