Hot-gas-filtering fabric of spaced uncrimped support strands and

Details Hot-gas-filtering fabric of spaced uncrimped support strands and Hot-gas-filtering fabric of spaced uncrimped support strands and

1992-01-30

1993-01-19

Hart, Charles

Gas separation

Two or more separators

Plies or layers of different characteristics or orientation

55523, 55527, 55DIG30, 139420B, 139420C, B01D 4600

Patent

active

051804093

ABSTRACT:
A fabric for filtering particulate matter from a stream of hot gases, e.g., from a diesel engine, has an unknotted weave of flexible, incompressible, uncrimped, spaced support yarns and flexible, lofty, fully crimped, fill yarns. During the weaving process, the fill yarns are pulled tightly against the support yarns so that they do not slip or shift. For greater assurance of good filtering, a filter employs multiple layers of the fabric, with the support yarns of each layer extending orthogonally to those of adjacent layers. For uses involving prolonged exposure to high temperature, both the support yarns and fill yarns can be continuous-filament ceramic yarns such as alumina-boria-silica yarns. For lower temperatures, the yarns can be primarily glass.

REFERENCES:
patent: 4066106 (1978-01-01), Graham
patent: 4205971 (1980-06-01), Abthoff et al.
patent: 4261392 (1981-04-01), Westhead
patent: 4324572 (1982-04-01), Erdmannsdorfer et al.
patent: 4491517 (1985-01-01), Janovac
patent: 4543113 (1985-09-01), Forester et al.
patent: 4605585 (1986-08-01), Johansson
Hardenberg et al., "Experiences in the Development of Ceramic Fiber Coil Particulate Traps," SAE Technical Paper Series, International Congress and Exposition, Detroit, MI, Feb. 23-27, 1987, pp. 67-78.

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