An enclosed extended nip press apparatus

Details An enclosed extended nip press apparatus An enclosed extended nip press apparatus

D - Textiles, Paper

21

F

D21F 3/02 (2006.01)

Patent

CA 2062728

An enclosed extended nip press apparatus (10) is disclosed for pressing water from a formed web (W). The apparatus (10) in- cludes a frame (12) and a back- ing roll (14) rotatably secured to the frame (12). A press member (16) cooperates with a backing roll (14) for defining therebe- tween an extended nip (N) for the passage therethrough of the formed web (W). A press blanket (18) extends in a closed loop through the nip (N), the blanket (18) having a first and a second lateral edge (20 22) and an inner and an outer surface (24, 26). A first and a second head (28, 30) are rotatably secured to the press member (16) with the first and second heads (28, 30) being disposed adjacent to and cooperating with the first and the sec- ond edges (20, 22) respectively of the blanket (18). The first and the second heads (28, 30) define first and second annular chan- nels (32, 34) respectively for the reception therein of the first and the second lateral edges (20, 22) respectively of the blanket (18). A first and a second annular seal (36, 38) are disposed within respectively the first and the second channels (32, 34) with the seals (36, 38) contacting the respective edges of the blanket (18). A first and second plurality of barbs (40, 42) extend from the first and the second channels (32, 34) respectively such that the first plurality of barbs (40) extend towards and engage the first lateral edge (20) of the blanket (18) and are disposed on the opposite surface (26) of the blanket (18) relative to the first seal (36). The second plurality of barbs (42) extend towards and engage the second lateral edge (22) of the blanket (18). The second plurality of barbs (42) are disposed on the opposite surface (26) of the blanket (18) relative to the second seal (38) so that during use of the appara- tus (10), lateral movement of the edges (20, 22) of the blanket (18) relative to the heads (28, 30) is inhibited.

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