Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1982-01-18
1983-11-01
Paschall, M. H.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219358, 219493, 219388, 53509, 53556, H05B 102
Patent
active
044131720
ABSTRACT:
In a skin packaging machine, a method and apparatus for maintaining a film heating oven at a low temperature wherein during a very short repeating duty cycle, e.g., less than a minute, the power to the oven heaters is applied for a short period and is shut down for the remainder of the period through solid state relay switching.
REFERENCES:
patent: 3627983 (1971-12-01), Pickering
patent: 3666921 (1972-05-01), Shevlin
patent: 4010412 (1977-03-01), Forman
patent: 4046991 (1977-09-01), Sefton et al.
Nordson Corporation
Paschall M. H.
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