Patent ID: 6848195
Filing Date: 2005-02-01
Classification: D21F,D21G

Abstract:
1. A blow box for supporting a web run in a paper machine, said blow box comprising: a structure; members arranged on said structure for maintaining a negative pressure in at least one negative pressure region between a wire in the paper machine and said structure of said blow box; and hinge members associated with said members, said hinge members being arranged on said structure, wherein said members comprise blowing members and blocking members, said blowing members ejecting air between said blocking member and said wire, each of said blocking members having a blocking surface facing said wire and a back surface facing away from said wire, said blocking members being arranged at least at one of a beginning and an end of said negative pressure space relative to a running direction of the wire, and each of said blocking members extending across at least a portion of said wire and hingably connected to said structure by corresponding ones of said hinge members such that said blocking member is pivotable about an articulation point of said corresponding one of said hinged members in response to a pressure different between a pressure acting on said blocking surface and a pressure acting on said back surface for maintaining a pressure difference between said negative pressure region and a region outside of said negative pressure region.