Multi-layer paper sheet forming system

Details Multi-layer paper sheet forming system Multi-layer paper sheet forming system

1994-07-14

1996-09-17

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162303, D21F 1104

Patent

active

055565131

ABSTRACT:
An improved multi-layer paper sheet forming system is disclosed, in which a degree of dispersion of fibers under the condition where a paper layer has been formed is large, thereby formation of a paper sheet is improved, moreover, bases of short wire cloth sections can be installed at the same level as a building floor and a complicated base of the shape of steps is not necessitated. The system comprises one endless felt loop and a plurality of short wire cloth sections disposed on the endless felt and provided with a dewatering instrument having, as dewatering elements, forming blades consisting of two zones, that is, a flat front half and a curved rear half. The short wire cloth section includes a forming roll having a large diameter and a breast roll having a small diameter, and the plurality of short wire cloth sections are disposed substantially at the same level. A movable return roll is equipped, which raises the felt between the adjacent short wire cloth sections so as to wrap around the short wire cloth so that an initial engagement point between the felt and the short wire cloth may come to an arbitrary position of the curved portion of the dewatering instrument existing at the upper portion of the short wire cloth section.

REFERENCES:
patent: 3573162 (1971-03-01), Brezinski
patent: 3772140 (1973-11-01), Kobayashi
patent: 4004968 (1977-01-01), Braun et al.
patent: 4154645 (1979-05-01), Kankaanpaa
patent: 4830709 (1989-05-01), Turner et al.
patent: 5445713 (1995-08-01), Kunihisa et al.

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