Vacuum roll transfer apparatus

Details Vacuum roll transfer apparatus Vacuum roll transfer apparatus

1991-03-18

1992-10-06

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

34122, F26B 1316

Patent

active

051520788

ABSTRACT:
A vacuum roll transfer apparatus is disclosed for drying a web extending through a single tier dryer section of a paper machine. The apparatus includes a rotatable perforate shell having a first and a second end. A stationary duct is disposed within and along the length of the shell between the ends of the shell. The duct is connected to a source of partial vacuum and the shell defines a plurality of holes along the length thereof such that in use of the apparatus, when the duct is connected to the source of partial vacuum, a partial vacuum is generated within a chamber defined between the shell and the duct. A flow restricting arrangement is disposed within the duct for generating a greater vacuum level adjacent to at least one of the ends of the shell for facilitating threading of a tail of the web.

REFERENCES:
patent: 2714342 (1955-08-01), Beachler
patent: 4483083 (1984-11-01), Chance
patent: 4882854 (1989-11-01), Wedel et al.
patent: 5031338 (1991-07-01), Wedel

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