Heating system in the manufacture of printed circuit boards, ass

Heating – Processes of heating or heater operation – Continous strip – strand or web passed longitudinally through...

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432 11, 432 59, 432230, 432234, F27D 312

Patent

active

049732439

ABSTRACT:
Printed circuit boards, assemblies and the like are heated uniformly from edge to edge or to a desired lateral temperature profile while being conveyed through a heating area. The conveying systems reliably conveys circuit boards and the like through the heating area without dropping them. A rail heater is provided to heat rails supporting conveyors having pins to hold circuit boards and the like. A control for the rail heaters controls the temperature of the rails so the circuit boards are positively supported on the conveyors and have a uniform temperature profile or desired temperature profile from edge to edge.

REFERENCES:
patent: 3857690 (1974-12-01), Zappia
patent: 4306856 (1981-12-01), Arippol
patent: 4321031 (1982-03-01), Woodgate
patent: 4338078 (1982-07-01), Lampkin
patent: 4486172 (1984-12-01), Dunning
patent: 4504008 (1985-03-01), Kent et al.
patent: 4832249 (1989-05-01), Ehler

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