Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1997-10-14
2000-03-14
Ip, Sikyin
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148712, 266255, 432 2, C22F 116
Patent
active
060367938
ABSTRACT:
The present invention provides a method of heat-treating an oxygen-sensitive workpiece to minimize any oxidation of the workpiece, as well as an improved door seal specially suited for use with oxygen-sensitive products. In the method, an oven has an oven chamber and an outer housing, with an enclosure being defined therebetween. The workpiece is placed in the oven chamber and the chamber is sealed. Heated inert gas is circulated within the enclosure to heat the oven chamber and to hold it at a desired treatment temperature. The oven chamber is then cooled to a threshold temperature of the workpiece using inert gas. The chamber is then cooled further by circulating aerobic gas, preferably ambient air, within the enclosure. Another embodiment of the invention provides an oven with a housing forming an oven chamber, the oven chamber having a door opening in one of said walls. The oven also has a heated door and an inflatable seal carried by either the door or the housing, the seal extending about the area of contact between the door and the housing, the seal being filled with a nitrogen-containing gas.
REFERENCES:
patent: 3198503 (1965-08-01), Eichelberg et al.
patent: 3431002 (1969-03-01), Melgaard
patent: 3788651 (1974-01-01), Brown et al.
patent: 4208572 (1980-06-01), Melgaard
patent: 4460332 (1984-07-01), Lawler et al.
patent: 4722151 (1988-02-01), Westwell
patent: 5300453 (1994-04-01), Okamura et al.
Product Brochures (210), Despatch Oven Company, Chemical Drying, Sterilizing and Clean Room Ovens, published in the United States at least as early as Dec. 6, 1993.
Product Brochure (209), Despatch Industries, Inc., "Burn-In Ovens", published in the United States at least as early as Dec. 6, 1993.
Catalog 600-284, Despatch Industries Inc., "Laboratory Oven and Environmental Chamber Catalog", published in the United States at least as early as Dec. 6, 1993 (believed to have been published in 1984).
Larson Louis A.
Melgaard Hans L.
Despatch Industries Limited Partnership
Ip Sikyin
LandOfFree
Method of heat treating oxygen-sensitive products does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of heat treating oxygen-sensitive products, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of heat treating oxygen-sensitive products will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-165219