Heating – Work chamber having heating means – Having means by which work is progressed or moved mechanically
Patent
1987-06-08
1989-05-09
Yuen, Henry C.
Heating
Work chamber having heating means
Having means by which work is progressed or moved mechanically
432241, 432253, F27D 500
Patent
active
048284904
ABSTRACT:
The invention relates to an improved furnace oven for drying and firing porcelain dental workpieces. It has a plurality of worktables which can be inserted at a desired sequence into the muffle of the furnace oven. The workpiece to be processed is placed on, or prepared on one of the supports, the arm of such support is swung into a position beneath the opening of the muffle and lifted into the muffle. The furnace is of the vacuum type, and can be preprogrammed. It is possible to provide furnaces of this type where a number of programs can be prepared according to the number of supports and thus time is saved between the end of one firing cycle and the start of the next one with a new workpiece.
REFERENCES:
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patent: 2344035 (1944-03-01), Etten
patent: 2454253 (1948-11-01), Kniseton
patent: 2940745 (1960-06-01), Goiegel et al.
patent: 3463470 (1969-08-01), Green et al.
patent: 3836325 (1974-09-01), Nokamura et al.
patent: 3867093 (1975-02-01), Huttermann
patent: 4610628 (1986-09-01), Mizushina
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