Hybrid high-velocity heated air/infra-red drying oven

Details Hybrid high-velocity heated air/infra-red drying oven Hybrid high-velocity heated air/infra-red drying oven

1987-06-25

1988-07-12

Schwartz, Larry I.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 41, 34 68, 219354, 219358, 219343, 219405, 219411, 219388, F26B 330

Patent

active

047560916

ABSTRACT:
A hybrid oven for drying a coating on a continuous web is disclosed, including a chamber, a plenum for collecting and delivering heated air at high velocity adjacent said chamber, a plurality of air impingement nozzles interconnecting said plenum and said chamber and directing heating air from the plenum to the web being dried, and one or more controllable infra-red heaters disposed between said air nozzles including at least one infra-red element, a sensor for providing a control signal relative to temperature and controller means for controlling power to the infra-red element. The sensor senses that the infra-red element is operating at less than a predetermined temperature and is providing less than a required infra-red output, whereby the controller provides a higher voltage until the predetermined infra-red output is reached.

REFERENCES:
patent: 3720002 (1973-03-01), Martin
patent: 4103277 (1978-07-01), Griffin et al.
patent: 4336279 (1982-06-01), Metzger
patent: 4531047 (1985-07-01), Canfield et al.
patent: 4665627 (1987-05-01), Wilde et al.

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