Presses – Methods – With heating or cooling
Patent
1990-04-20
1992-03-10
Hornsby, Harvey C.
Presses
Methods
With heating or cooling
100 93P, 100 93RP, 100151, 1565835, 425371, B30B 1534, B30B 1300
Patent
active
050943081
ABSTRACT:
A method and device for heating the pressure belt of a press, in which the press pressure is exerted by a gas-filled pressure chamber on the working run of pressure belt and heat transfer is increased by a high circulation rate of the pressure medium in pressure chamber, to create a situation in which a large quantity of heat can be transferred even in the lower pressure ranges. Steam is mixed with a gaseous pressure medium, e.g. air, before it enters the pressure chamber and the back of the pressure belt is exposed to the steam-air mixture in the vicinity of pressure chamber, whereupon the steam condenses wholly or partially on the colder back of the pressure belt in the zone adjacent to the entrance. The heat of condensation thus released results in intensive heating of the pressure belt in this zone and hence of the workpiece.
REFERENCES:
patent: 2135763 (1938-01-01), Nicholson
patent: 2437680 (1948-03-01), Cornelius
patent: 2459295 (1949-01-01), Skoog
patent: 2909804 (1959-10-01), Means
patent: 3580795 (1971-05-01), Eichenlaub
patent: 3734669 (1973-05-01), Ettel
patent: 4311550 (1982-01-01), Kerttula
patent: 4334468 (1982-06-01), Guttinger et al.
patent: 4794855 (1989-01-01), Okajima et al.
Firma Theodor Hymmen
Gerrity Stephen F.
Hornsby Harvey C.
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