Dry ice pelletizer

Details Dry ice pelletizer Dry ice pelletizer

1993-07-28

1995-01-31

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 35, F25J 100

Patent

active

053850238

ABSTRACT:
A dry ice pelletizer includes a ram structure that eliminates the need for piston rings to form the pellets thereby eliminating contamination of the pellets from piston ring wear products and piston/cylinder lubricants. The ram structure is pulled down into compression contact with dry ice snow formed in a snow chamber by a pair of hydraulic actuators coupled to a cross-head. The physical separation of the ram and the actuators further eliminates the source of contamination from hydraulic actuator fluid.

REFERENCES:
patent: 2153629 (1939-04-01), Kobold
patent: 2464089 (1949-03-01), Jones
patent: 3098361 (1963-01-01), Haase
patent: 3835657 (1974-09-01), Scudder
patent: 3901044 (1975-08-01), Vahl
patent: 3952530 (1976-04-01), Tyree, Jr.
patent: 4412852 (1983-11-01), Umino et al.
patent: 4780119 (1988-10-01), Brooke

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