Abstract: A low-density non woven abrasive article formed of a multiplicity of continuous, crimped, thermoplastic organic filaments having a portion of the filaments entangled with one another and having an organic thermoset binder which binds at least some of the filaments at points where they contact, performs well as a scouring article. The filaments of the article may further have abrasive particles adhesively bound thereto by the binder. The web of the low-density article is produced by entangling a plurality of substantially parallel, continuous, crimped, thermoplastic organic filaments, preferably by needlepunching, and coating the entangled web with a binder precursor solution or slurry.

Abstract: An automatic surface treating work wheel having controlled speed and pressure for finishing the surfaces of various materials to achieve desired finish results. The pressure is controlled by a counterbalance system using two air pressurized pneumatic cylinders.

Abstract: A positioning apparatus for supporting and guiding a tool to effectuate a work function on a predetermined area of a stationary surface. The apparatus comprises a support guide frame which is displaceably connected to a displaceable base. The base is displaceable and positioned to a stationary location relative to the predetermined area. The support guide frame has a pair of spaced-apart side arms each connected at a rear end thereof to the base by a respective pivotal telescopic coupling. The telescopic coupling permits each side arm to be indendently displaced axially and pivotally to one another in parallel vertical planes. A transverse guide beam is secured to the side arms and is axially displaceable relative thereto. A tool carriage is secured to the guide beam and controllably displaced therealong. The carriage has a telescopic support member axially displaceable in a vertically pivotal bushing.