Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1987-07-08
1988-11-22
Bennet, Henry A.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 39, 34 68, 432209, 432148, F26B 330
Patent
active
047855525
ABSTRACT:
A housing open at both ends has opposed concaved radiant emitter walls which are disposed on opposite sides of a conveyor for defining a drying chamber through which the conveyor moves freshly coated objects. Heated air from a closure is fed to outer cavities in the housing and this air passes inwardly through nozzle ports in partition plates to impinge and heat the walls. A major portion of the air returns to be reheated in the closure. Fresh air is introduced, in heat exchanging relationship to the heated air, to ducts which discharge into the drying chamber. Overhead fans selectively circulate turbulent or laminar air in the drying chamber. Air is withdrawn from both the drying chamber and the outer cavities via over head exhaust ducts. A computer and sensors control the temperature of the emitter walls by controlling the heating of the heated air. The computer and a sensor in the drying chamber controls the temperature of the air in the drying chamber to the same or a lower temperature than the wall temperature. Methods of drying paint or other coatings are disclosed wherein the ambient temperature of the air is controlled as to velocity and temperature and the temperature of radiant walls is controlled.
REFERENCES:
patent: 3813216 (1974-05-01), Baur et al.
patent: 4546553 (1985-10-01), Best
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