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