Transferring a web from a pick-up fabric to a flow-through dryin

Details Transferring a web from a pick-up fabric to a flow-through dryin Transferring a web from a pick-up fabric to a flow-through dryin

1978-07-06

1980-03-25

Fisher, Richard V.

Paper making and fiber liberation

Processes and products

Running or indefinite length work forming and/or treating...

34 16, 34 23, 34115, 34116, 34122, 34123, 162290, 162306, 162364, D21F 518

Patent

active

041949471

ABSTRACT:
A method and apparatus in a paper making machine for transferring a web from a pick-up fabric to a flow-through drying wire for transport of the wire supported web to a flow-through dryer cylinder including passing a section of the flow-through drying wire over the web supported by the pick-up fabric thereby defining a sandwich structure of the drying wire, the web and the pick-up fabric. A first vacuum is applied by a first vacuum member on the sandwich structure from the flow-through drying wire side over a narrow first detaching zone. The direction of the pick-up fabric with respect to the flow-through drying wire is deviated and a second vacuum is applied by a second vacuum member over a second detaching zone subsequent to the first detaching zone in the direction of web travel from the drying wire side thereof thereby securing the web on the flow-through drying wire. The pick-up fabric may thus comprise either a felt or wire structure.

REFERENCES:
patent: 2537129 (1951-01-01), Goodwillie
patent: 3303576 (1967-02-01), Sisson
patent: 3560333 (1971-02-01), Douglas et al.
patent: 3816941 (1974-06-01), Holik et al.
patent: 3821068 (1974-06-01), Shaw
patent: 4036684 (1977-07-01), Schmitt et al.
patent: 4055461 (1977-10-01), Turunen
"Fortschritte in der Durchstromtrockungstechnik," Das Papier, No. 10a, 1976, pp. 118-127.

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