Heating furnaces

Details Heating furnaces Heating furnaces

1988-03-04

1990-10-23

Yuen, Henry C.

Heating

Advancing structure flexing, looping or coiling sheet, web...

432194, 432249, F27B 928, F27B 700

Patent

active

049647997

ABSTRACT:
A heating furnace comprises a horizontal body portion, a source of heat located at an intermediate portion of the body portion for forming hot gas which circulates in the body portion by natural convection, a gas discharge port formed in the wall of the body portion, a gas collecting hood connected to the lower end of an exhaust cylinder, and a horizontal conveyor for conveying an article to be heated through the furnace. The opposite ends of the body portion act as the inlet and outlet ports as well as gas discharge ports. In one embodiment, upper half portions of the inlet and outlet ports are covered by shielding plates. In another embodiment the opposite ends of the body portion are inclined downwardly to form the inlet and outlet ports near or below the bottom surface of the furnace. In still another modification, air curtains are formed at the inlet and outlet ports.

REFERENCES:
patent: 1832226 (1931-11-01), Loesche
patent: 2160610 (1939-05-01), Witting
patent: 3514084 (1970-05-01), Morin
patent: 4385945 (1983-05-01), Compton et al.
patent: 4586899 (1986-05-01), Takahashi

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