| 摘要 |
A method and apparatus for transferring a web (10) from a forming fabric (12) in a forming section of a paper making machine to a transfer felt or fabric (16) is disclosed including directing the web carrying forming fabric (12) in a substantially longitudinal direction adjacent an underside of a transfer shoe (30) in a transfer zone (T) said web being positioned between the forming fabric (12) and the transfer shoe (30) having a substantially planer lead-in surface (38) and a arcuate exiting surface (40) of a predetermined radius (R1), the lead-in surface (38) including an arcuate trailing edge (42) having a predetermined radius (R2) less than that of the arcuate exiting surface (R1) with the trailing edge (42) and the exiting surface being separated by a suction opening (36), directing the transfer felt (16) in a substantially longitudinal direction adjacent the underside of the transfer shoe (30) with the transfer felt (16) being positioned between the web (10) and the transfer shoe (30), the transfer felt (16) entering the transfer zone (T) at an angle with respect to the forming wire (12), creating a nip region adjacent the arcuate trailing edge (42) where the transfer felt (16) is pressed against the web (10) in a concentrated area for initiating the transfer of the web from the forming fabric (12) to the transfer felt (16) applying a suction to the web (10) through the transfer felt (16) adjacent the suction opening (36) whereby the web (10) is transferred from the forming fabric (12) to the transfer felt (16) and directing the transfer felt (16) and transferred web (10) over the arcuate exiting surface (40) and away from the forming fabric (12) such that a greater transfer force is realized in the transfer zone (T) than with previous transfer devices.
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