Heat-sealing wheels for forming a longitudinal weld or seal in s

Details Heat-sealing wheels for forming a longitudinal weld or seal in s Heat-sealing wheels for forming a longitudinal weld or seal in s

1998-02-27

1999-08-10

Sells, James

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

With work feeding or handling means

156582, 1565831, 100334, 100160, B30B 1500

Patent

active

059353791

ABSTRACT:
A heat seal wheel for use with a heat sealing apparatus associated with a continuous packaging machine, for forming a longitudinal seal in a flat sheet of flexible film. The heat seal wheel is characterized by a planar heater comprising a laminar resistive heating element sandwiched in between a top layer and a bottom layer of a thermally conductive and electrically insulative material. The top layer is bonded to the bottom surface a bearing disk, in contact with and supporting a rotating heat seal wheel for conductively heating the seal wheel and producing a heat seal in the seams of a moving web of plastic film.

REFERENCES:
patent: 4746391 (1988-05-01), Heyse et al.
patent: 4808150 (1989-02-01), Herrington et al.
patent: 5411625 (1995-05-01), Focke et al.

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