Dryer section of a paper machine including cylinder groups with

Details Dryer section of a paper machine including cylinder groups with Dryer section of a paper machine including cylinder groups with

1995-03-24

1996-09-10

Sollecito, John M.

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

34111, 34454, 162207, F26B 1102

Patent

active

055533930

ABSTRACT:
A dryer section of a paper machine including cylinder groups provided with single-wire draw having smooth-faced heated drying cylinders against which a web to be dried enters into direct contact, and reversing rolls. The groups with single-wire draw have a drying wire which is guided in a loop by guide rolls as well as by the drying cylinders and the reversing rolls so that the drying cylinders are placed outside the wire loop, and the reversing rolls are situated in gaps between the drying cylinders inside the drying-wire loop. In order to optimize the drying capacity calculated per unit of length of the dryer section in the machine direction, as the drying makes progress, a different ratio of the drying cylinder diameter to the reversing roll diameter is employed, so that, in the first group or groups in the initial end of the dryer section, the ratio is higher than the corresponding ratio in the groups in the middle area of the dryer section. In the group or groups in the final end of the dryer section, a diameter ratio is used that is higher than the ratio in the middle area of the dryer section.

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patent: 5241761 (1993-09-01), Hauser
patent: 5279050 (1994-01-01), Tormanen

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