Abstract: A blast chamber contains a plurality of rotatable vertically disposed members with numerous holes therealong. Slidable brackets or yoke assemblies are secured to the vertical members at desired positions. in turn, blast wheels are secured to the mounting brackets. A large number of horizontal, vertical, and angular positions for each blast wheel results and permits the blast treatment of an object of almost any shape.
Abstract: The present invention provides a breathable fabric comprising a woven first layer and a woven second layer said first layer at spaced points both longitudinally and laterally of said fabric being interwoven with said second layer providing tie-in points of said first layer to said second layer, the spacing between the tie-in points being sufficiently close to provide that the layers are always in contact with each other over the whole area of the adjacent surfaces.