Edge seal for vacuum preheater

Details Edge seal for vacuum preheater Edge seal for vacuum preheater

1998-06-01

1999-12-07

Bennett, Henry

Drying and gas or vapor contact with solids

Process

Freeze-drying

34417, 34634, 34646, F26B 506

Patent

active

059962461

ABSTRACT:
Flexible edge sealing membranes cooperate with the heating surface of a vacuum preheater and a web moving over the surface (1) to minimize air loss in the portions of the heating surface not covered by the web, (2) to prevent differential heating of the edges of the web induced by unrestricted air flow, and (3) to provide reduced friction contact with the edge portions of the web.

REFERENCES:
patent: 3929551 (1975-12-01), Frantzen
patent: 4825255 (1989-04-01), Iaia, Jr. et al.
patent: 5424805 (1995-06-01), Leonhart et al.
patent: 5501762 (1996-03-01), Marscke et al.
patent: 5600900 (1997-02-01), Marschke
patent: 5706994 (1998-01-01), Welch et al.
patent: 5857605 (1999-01-01), Welch et al.

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