Device for guiding a sheet of fibrous material in a single-row d

Details Device for guiding a sheet of fibrous material in a single-row d Device for guiding a sheet of fibrous material in a single-row d

1997-01-29

1998-07-21

Bennett, Henry A.

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

34114, D21G 500

Patent

active

057820090

ABSTRACT:
A device for guiding a sheet of fibrous material to be dried and a support belt through a drying device. The device including an external suction box having first and second openings located adjacent a deflection roll and adjacent to a lift-off point associated with a first dryer cylinder, respectively. The external suction box also including a first and second aspiration conduit respectively associated with the first and second openings. The deflection roll may be aspirated by an external vacuum souce coupled to the external suction box. The fibrous sheet, through the support belt, may be assisted at the lift-off point by aspiration by a separate external vacuum source coupled to the second aspiration conduit.

REFERENCES:
patent: 3320677 (1967-05-01), Reitzel
patent: 4359828 (1982-11-01), Thomas
patent: 4441263 (1984-04-01), Vedenpaa
patent: 4905380 (1990-03-01), Eskelinen et al.
patent: 5068980 (1991-12-01), Muller
patent: 5086571 (1992-02-01), Hietanen
patent: 5115581 (1992-05-01), Viitanen
patent: 5341579 (1994-08-01), Schiel et al.
patent: 5477624 (1995-12-01), Haessner et al.
patent: 5515619 (1996-05-01), Kahl et al.
European Search Report and Annex, dated Jun. 17, 1997.

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