Electric heating – Heating devices – Combined with pressure application means
Reexamination Certificate
2005-04-19
2005-04-19
Walberg, Teresa J. (Department: 3742)
Electric heating
Heating devices
Combined with pressure application means
C156S311000
Reexamination Certificate
active
06881929
ABSTRACT:
A portable heat sealer for sealing heavy grade thermoplastic films comprises a plurality of adjacent, segmented heating elements positioned along the underside of a heated sealing bar. The segmented heating elements are under the control of a microprocessor for controlling the energy applied to the heated sealing bar to avoid the formation of hot spots and to obtain a strong seal. Each heating element is maintained in firm contact with the heated sealing bar by means of a tension spring. A thermoplastic film bag is placed on the heated sealing bar and a movable sealer jaw is lowered on top of the bag. A jaw switch is activated by the sealer jaw which turns-on power to the heat sealer. A latch32attaches to a clip on the end of the sealer jaws and secures the sealer jaw in place. Pilot lights are provided to indicate to an operator the cycles of “ready”, “heat” and “cool”.
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Idolon Technologies
Pearson & Pearson LLP
Walberg Teresa J.
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