Guide roll apparatus for a dryer of a paper machine drying secti

Details Guide roll apparatus for a dryer of a paper machine drying secti Guide roll apparatus for a dryer of a paper machine drying secti

1987-05-26

1989-11-28

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

34117, F26B 1300, F26B 1330

Patent

active

048828548

ABSTRACT:
A guide roll apparatus is disclosed for guiding a contiguous web and web-supporting felt through a drying section of a paper machine. The apparatus includes a rotatable guide roll having an outer cylindrical surface defining a first and a second edge portion and a central portion disposed between the edge portions. The first edge portion defines a first plurality of air flow channels such that in use of the apparatus, when the web and felt are guided around the rotatable guide roll, air entrapped between the first edge portion and the felt wrapped around the first edge portion is permitted to flow through the first plurality of channels away from the felt so that fluttering of the web during guidance around the first edge portion is inhibited. The apparatus also includes a second edge portion which defines a second plurality of air flow channels such that in use of the apparatus, when the web and the felt are guided around the rotatable guide roll, air entrapped between the second edge portion and the felt wrapped around the second edge portion is permitted to flow through the second plurality of channels away from the felt so that fluttering of the web during guidance around the second edge portion is inhibited.

REFERENCES:
patent: 3345757 (1967-10-01), Daane
patent: 3868780 (1975-03-01), Soininen et al.
patent: 4202113 (1980-05-01), Kankaanpaa
patent: 4359827 (1982-11-01), Thomas
patent: 4441263 (1984-04-01), Vedenpaa
patent: 4516330 (1985-05-01), Eskelinen et al.
patent: 4677762 (1987-07-01), Futcher

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