Heating – Work chamber having heating means – Having means by which work is progressed or moved mechanically
Patent
1994-10-21
1996-10-22
Kwon, John T.
Heating
Work chamber having heating means
Having means by which work is progressed or moved mechanically
432 8, 432 59, 432144, 432148, F27B 900
Patent
active
055671519
ABSTRACT:
This invention discloses a furnace in which hot gases are discharged from heaters to provide uniform heating to printed circuit boards commonly used in the electronic industry. Outside air is prevented from flowing into the furnace, so as to reduce and to stabilize the concentration of oxygen. The furnace 1 is designed with an air tunnel 2 to separate it into upper and lower sections which are fitted with hot air blow type heaters 5a, 5b. The hot air discharged from the heaters in the upper and lower sections flow in opposite directions to create a counter-flow of gases. Each individual heater can produce its own hot air circuit. They are designed with the blowing outlet and suction inlet in the same structure with the blowing outlet fitted with a redirectional flow plate 18 which directs the hot air to the suction inlet.
REFERENCES:
patent: 2840361 (1958-06-01), Hermans
patent: 3050811 (1962-08-01), De Bartolomeis
patent: 4235591 (1980-11-01), Aebli
patent: 4469314 (1984-09-01), Takeuchi et al.
patent: 4715810 (1987-12-01), Ramsey et al.
patent: 5154338 (1992-10-01), Okuno et al.
Mizoguchi Naotake
Takahashi Tadao
Kwon John T.
Senju Metal Industry Company Limited
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