Process for forming bubble-pack

Details Process for forming bubble-pack Process for forming bubble-pack

1996-12-13

1998-12-29

Loney, Donald

Stock material or miscellaneous articles

Structurally defined web or sheet

Nonplanar uniform thickness material

156147, 156290, 1563084, B32B 312, A63B 3900

Patent

active

058538569

ABSTRACT:
A process for producing bubble-pack. Bulges are formed in a first sheet by a combination of mechanical pressure, vacuum and air pressure, without using the high temperatures associated with the prior art processes. A second sheet is sealed to the first sheet, opposite the bulges, by contacting the sheets and heating them only along the area of contact. The process of the present invention is suitable for forming bubble-pack from a wider variety of materials, notably HDPE, and bubble-pack with a lower weight per unit area, than are the prior art processes.

REFERENCES:
patent: 3195686 (1965-07-01), Johnson
patent: 3294387 (1966-12-01), Chavannes
patent: 4412879 (1983-11-01), Ottaviano
patent: 4417936 (1983-11-01), Gaffney

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