Helical dryer belt with profiled permeability

Details Helical dryer belt with profiled permeability Helical dryer belt with profiled permeability

1984-11-02

1986-04-22

Schwartz, Larry I.

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

34123, 34243R, 139383A, 474260, 428222, F26B 1308

Patent

active

045833028

ABSTRACT:
A non-woven helical dryer belt is illustrated having a desired permeability profile which includes lateral zones 42 and 44 of reduced permeability and a medial zone 46 of increased permeability. The helical drive belt is made by joining a number of helix strips (20) together lengthwise and having the helix strips extend crosswise the fabric. A base monofilament element (40) extends across the entire width of the drive belt to impart a base permeability characteristic to the fabric. At opposing lateral edges of the fabric, an edge filler strip is inserted which reduces the permeability of the fabric in the lateral zones (42, 44). The height of the base and edge monofilament elements is made such that they do not overlap one another and are maintained in their side by side arrangement in the lateral zones of reduced permeability. A contoured monofilament edge element (C) is also disclosed which produces a very low permeability in the lateral zones (42, 44) by incorporating contoured edges (60) which protrude into the crevice spaces of the winding spaces to more fully block the air flow in the lateral zones.

REFERENCES:
patent: 3867766 (1975-02-01), Wagner
patent: 4381612 (1983-05-01), Shank
patent: 4490925 (1985-01-01), Smith

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