Seal wire control for packaging machinery responsive to product

Details Seal wire control for packaging machinery responsive to product Seal wire control for packaging machinery responsive to product

1995-03-31

1997-01-28

Jeffery, John A.

Electric heating

Heating devices

Combined with pressure application means

219492, 219518, 1565832, 53477, 533759, H05B 102

Patent

active

055974996

ABSTRACT:
A seal wire heat control system for sealing thermoplastic film as adapted to control the duration of heat impulses applied to the sealing wire by remembering the past history of the sealing machine. The application of power to the sealing wire is provided by a series of power impulses, the duration of which is shortened incrementally as the apparatus continues to run and is lengthened incrementally when the apparatus sits at rest.

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