Quench devices, glass tempering furnaces, and methods of utilizi

Glass manufacturing – Processes – Glass preform treating

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Details

65350, 65351, 198790, C03B 2700

Patent

active

043009379

ABSTRACT:
Primary and secondary quench sections and radiant electrical heaters for a roller hearth glass tempering furnace having a roller track supporting the endless conveyor drive belts, and adjustable locators for conveyor roller spacing. At least the primary quench section includes high flow, low suction air cooling devices. The heating zone size may conform to the size of the glass part being treated. Optionally, the glass part may be reciprocated five inches or less in either direction while being heated or cooled. Fully adjustable roller and drive belt support systems control the horizontal plane of the track and thus maintain a more level conveyor bed. A unitized zone construction allows for future increase or decrease in product output, simply by installation of one or more heating zones and lengthening of drive belts. A wear-resistant, disposable Teflon and/or silicone axle can be used. The furnace incorporates soft, heat-resistant fabric belts which are Teflon and/or silicone rubber coated.

REFERENCES:
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patent: 2528865 (1950-11-01), Dale
patent: 3344903 (1967-10-01), Holm
patent: 3672861 (1972-06-01), Ritter, Jr. et al.
patent: 3806331 (1974-04-01), Bezombes
patent: 3994711 (1976-11-01), McMaster
patent: 4028086 (1977-06-01), Rahrig et al.
patent: 4133667 (1979-01-01), Nitschke
patent: 4167997 (1979-09-01), Revells
patent: 4204845 (1980-05-01), Shields et al.
Heat Technology, Fall 1979, pp. 3-18, Selas Corp. of America, Box 200, Dresher, PA 19025

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