Induction sealing machine and package wrapper useful therewith

Details Induction sealing machine and package wrapper useful therewith Induction sealing machine and package wrapper useful therewith

1989-10-17

1991-09-17

Sipos, John

Package making

Closing packages and filled receptacles

Including provision for pleat of cover overhang

533713, 533767, 533873, 1563797, 219 1053, B65B 5118

Patent

active

050482602

ABSTRACT:
An apparatus for induction-sealing a package having sides formed of overlaying flaps with a thermoplastic material between the flaps serving as the adhesive has independently adjustable platens that bear against counter-rotating conveyor belts for applying varying pressure to the package sides to be sealed. A special package wrapper is also disclosed which is formed of a laminate having the thermoplastic material printed on a layer of printing ink. When heated, the thermoplastic material seeps through the ink to bond with a polyolefin layer below and thereby seals overlying package flaps together.

REFERENCES:
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patent: 4637199 (1987-01-01), Steck et al.
patent: 4707213 (1987-11-01), Mohr et al.
Kresnosky, "Improving the Induction Sealing Process Through Sealing Coiling Design", Apr. 1987; pp. 42-45.

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