Vented lead blade

Details Vented lead blade Vented lead blade

D - Textiles, Paper

21

F

D21F 1/54 (2006.01) D21F 1/00 (2006.01) D21F 1/10 (2006.01) D21F 1/48 (2006.01) D21F 9/00 (2006.01) D21F 9/02 (2006.01)

Patent

CA 2356804

A vented lead blade to be located in a papermaking machine so that the stock jet impinges the forming fabric at, or near to, its trailing edge, serves to bend the forming fabric before it enters the forming section, has grooves to vent a substantial proportion of any air trapped in the wedge shaped space between the surface of the forming fabric and the surface of the stock jet, and at least some of any liquid carried with the air. The vented lead blade enables the forming fabric to be positioned so that the angle of impingement of the stock jet onto the forming fabric can be minimized to substantially zero; facilitates reduction of the unsupported length of the stock jet; and can be used in an open surface forming section with a single forming fabric, or in the forming section of a two fabric papermaking machine.

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