Liquid purification or separation – Filter – Within flow line or flow line connected close casing
Patent
1987-08-31
1989-10-31
Fisher, Richard V.
Liquid purification or separation
Filter
Within flow line or flow line connected close casing
210483, 210489, 2104931, 21049701, 383117, 493189, 493214, 493243, 493260, 493303, 493308, 55363, 55DIG5, 55DIG26, B01D 2912
Patent
active
048775266
ABSTRACT:
A flexible filter bag, the filter element of which is seamless and avoids prior leakage problems, is made by wrapping a flexible, preferably perforated, filtering fabric and a flexible nonfiltering transport material together onto a cylindrical mandrel to provide a tube. A thin metal ring is fitted into the tube, and the portion of the filtering fabric which extends beyond the edge of the transport material is folded inwardly around the ring to provide a cuff. A sleeve of a length about twice that of the tube is inserted into and pulled over the tube until the free ends of the sleeve are approximately coterminous with the ring-free end of the tube. The free ends of the sleeve and tube are gathered in the manner of a sausage casing and then subjected to pressure to form a seal, but the convolutions of the transport material terminate just short of the seal so as to avoid bunching at the seal.
REFERENCES:
patent: 1585246 (1926-05-01), Hay
patent: 2364069 (1944-12-01), Hahn
patent: 3006480 (1961-10-01), Russell
patent: 3037637 (1962-06-01), Bub
patent: 3457707 (1969-07-01), Fesco
patent: 4398931 (1983-08-01), Shevlin
patent: 4543113 (1985-09-01), Forester et al.
patent: 4545833 (1985-10-01), Tafara
patent: 4600512 (1986-07-01), Aid
The Random House College Dictionary, revised edition, 1980, Random House, Inc. New York, N.Y., p. 295.
Brizuela Corazon C.
Johnson Todd W.
Anderson David W.
Fisher Richard V.
Kirn Walter N.
Millard Wanda L.
Minnesota Mining and Manufacturing Company
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