Couch press transfer apparatus and method

Details Couch press transfer apparatus and method Couch press transfer apparatus and method

D - Textiles, Paper

21

F

D21F 2/00 (2006.01)

Patent

CA 2064043

Apparatus for transferring a newly formed paper web (W) from the forming fabric (16) over a couch roll (38) in a paper- making machine includes a transfer roll (60) which guides a pick-up felt (F-P) into nipping engagement with the paper web (W) over the couch roll (38). The nip (N-P) is located intermediate the circumferentially spaced ends of a vacuum zone (68) on the sur- face of the couch roll (38). The web (W) with the forming fabric (16) on one side and the pick-up felt (F-P) on the other side is guided onto the transfer roll surface by the forming fabric (16) downstream of the nip (N-P) and is transferred onto the pick-up felt (F-P). The transfer roll (60) has a vacuum zone (68) located downstream of where it is wrapped by the forming fabric (16). The application of pressure on the web (W) over the couch roll (38) prior to, and in conjunction with, the nip (N-P) operates to further dewater the web (W) as well as to facilitate its transfer to the pick-up felt (F-P).

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