Enclosed extended nip press apparatus with inflatable seals and

Details Enclosed extended nip press apparatus with inflatable seals and Enclosed extended nip press apparatus with inflatable seals and

1989-07-06

1990-12-04

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

100153, 162361, D21F 308

Patent

active

049751522

ABSTRACT:
An enclosed extended nip press apparatus is disclosed for pressing water from a formed web. The apparatus includes a frame and a backing roll rotatably secured to the frame. A press member cooperates with a backing roll for defining therebetween an extended nip for the passage therethrough of the formed web. A press blanket extends in a closed loop through the nip, the blanket having a first and a second lateral edge and an inner and an outer surface. A first and a second head are rotatably secured to the press member with the first and second heads being disposed adjacent to and cooperating with the first and the second edges respectively of the blanket. The first and the second heads define first and second annular channels respectively for the reception therein of the first and the second lateral edges respectively of the blanket. A first and a second annular seal are disposed within respectively the first and the second channels with the seals contacting the respective edges of the blanket. A first and second plurality of barbs extend from the first and the second channels respectively such that the first plurality of barbs extend towards and engage the first lateral edge of the blanket and are disposed on the opposite surface of the blanket relative to the first seal. The second plurality of barbs extend towards and engage the second lateral edge of the blanket. The second plurality of barbs are disposed on the opposite surface of the blanket relative to the second seal so that during use of the apparatus, lateral movement of the edges of the blanket relative to the heads is inhibited.

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