Thermal insulation bag for vacuum-packaging micropowder material

Details Thermal insulation bag for vacuum-packaging micropowder material Thermal insulation bag for vacuum-packaging micropowder material

1986-03-25

1987-05-05

Moy, Joseph Man-Fu

Special receptacle or package

Laminate sheet packet

Cover of plural lamina

206484, 2065248, B65D 7300

Patent

active

046625216

ABSTRACT:
A thermal insulating unit includes a sealed inner gas-permeable bag containing an insulating micropowdered material, such inner bag having two major surfaces parallel to each other. Two multilayer sheets are respectively disposed on opposite sides of the gas-permeable bag and overlap the same, each sheet being formed of an innermost layer and an outermost layer of a thermoweldable plastic and an intermediate metal layer. The metal layer has smaller dimensions than the plastic layers such that each metal layer wholly covers only its corresponding inner-bag major surface. The four plastic layers are peripherally heat-sealed, the resulting outer bag having been evacuated. A device is provided on each metal layer for fixing such layer to and positioning it with respect to its respective two plastic layers.

REFERENCES:
patent: 4014433 (1977-03-01), Cerwin
patent: 4135022 (1979-01-01), Glick
patent: 4236652 (1980-12-01), Beguhn
patent: 4268531 (1981-05-01), Whiting, Jr.

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