Patent ID: 7005040
Filing Date: 2006-02-28
Classification: D21F

Abstract:
1. A vented impingement shoe, for use in a papermaking machine, located adjacent to a point of impingement of a stock jet ejected from a head box slice onto a moving forming fabric, the impingement shoe having (i) a leading edge located upstream of the point of impingement; (ii) a trailing edge; (iii) a machine side surface adapted to be releasably secured by a securing means to the papermaking machine; and (iv) a paper side surface, having predetermined cross-machine direction and machine direction profiles adapted to support the forming fabric in sliding contact; wherein the paper side surface includes a plurality of vents which begin substantially adjacent to the leading edge and end substantially adjacent to the trailing edge, and extend from the paper side surface and through the machine side surface of the impingement shoe.