Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1984-11-13
1986-10-07
Goldberg, E. A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
34225, F26B 1516
Patent
active
046161236
ABSTRACT:
A shrink oven which limits loss of heated air by controlled movements of the load and the door at the opening through which the load enters or leaves the oven. By automatically stopping the load in a flow-blocking relationship to the opening as it approaches and leaves the opening, and moving the door only when the load is in such a flow-blocking relationship, loss of heated air can be substantially reduced. Preferably further arrangements enable the air volume of the oven to be maintained constant as heated loads are removed and new loads are introduced. In an oven in which loads are introduced through a side entry door, move on a conveyor through the oven, and exit through another door, exiting and entry loads are synchronized in spacing and movement so that the rate of load displacment out of the oven at the exit is compensated by the rate of load displacement into the oven at the entry. Special arrangements prevent hot air loss around the sides of the oven during the exit and introduction phases. These include close-lying passage walls above and on both sides of the doors, for limiting the air conductance of the gaps about the loads. In another oven shown, a boundary wall of the oven, a movable top as shown, moves in synchronism with an entering or leaving load to increase and decrease air volume in opposite effect to that of an entering or exiting load, respectively.
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Engineering Drawing, Nutro.
Product Literature, Thimon, 12/83.
Goldberg E. A.
Walberg Teresa J.
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