Method and apparatus for uniformly drying moving webs

Details Method and apparatus for uniformly drying moving webs Method and apparatus for uniformly drying moving webs

1982-12-10

1985-02-12

Camby, John J.

Heating

Processes of heating or heater operation

Continous strip, strand or web passed longitudinally through...

34 48, 431 12, 431354, 432 37, 432 55, 432 59, F27B 928, F26B 1900, F23D 1340, F27D 1900

Patent

active

044988648

ABSTRACT:
A flame intensity controller for controlling the air/gas mixture introduced into a conveying and/or mixing tube. Plural heating arrays are transversely aligned to the direction of movement to dry the moving web. The controller selectively controls the heating intensity of each section of the heating arrays to thereby control the amount of drying experienced by each longitudinal section of the web. The controller may be a countercurrent air controller or a mechanical restrictor. The energy output of each section is controlled between adjustable upper and lower energy levels. However, the lower energy level is chosen to be sufficient to sustain combustion. The independent control of the dryer sections provides dramatic improvement in uniformity of the moisture "profile" across the web.

REFERENCES:
patent: 3214845 (1965-11-01), Huffman
patent: 3791049 (1974-02-01), Smith, Jr.

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