Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Including hydrostatic or liquid pressure
Reexamination Certificate
2007-07-31
2007-07-31
Johnson, Christina (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Including hydrostatic or liquid pressure
C072S060000
Reexamination Certificate
active
10380284
ABSTRACT:
A method for hot hydrostatic pressing by means of working liquid which tends to become unstable within a transition time when in contact with a blank heated to a high working temperature and at a pressure lower than the liquid's stabilization pressure. The pressing of the blank heated to the high working temperature is carried out by raising the pressure of the working fluid to said stabilization pressure for a time shorter than the transition time. This is achieved by surrounding the heated blank by a cover adapted to delay the contact between the heated blank and the working liquid until the pressure in the working chamber is raised.
REFERENCES:
patent: 3698220 (1972-10-01), Nilsson et al.
patent: 3931382 (1976-01-01), Witkin
patent: 01269509 (1989-10-01), None
Chertkov Vitaly
Danieli Guy
Lugovskoy Victor
Magaziner Vladimir
Huson Monica A
Johnson Christina
MLC Extrusion Systems Ltd.
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