초록

A method and apparatus for cleaning and conditioning a fabric in which pressurized fluid is directed into a restricted and diminishing passageway formed by the fabric and a member forming an extended nip therewith so that the fluid is forced through the fabric.

대표청구항 ▼

A method of cleaning and conditioning a fabric with pressurized fluid from a Coanda nozzle comprising: positioning a generally smoothly curved Coanda fluid flow attachment foil surface adjacent to a slit defining element to form an elongated slit; directing said fluid in a predetermined direction un

A method of cleaning and conditioning a fabric with pressurized fluid from a Coanda nozzle comprising: positioning a generally smoothly curved Coanda fluid flow attachment foil surface adjacent to a slit defining element to form an elongated slit; directing said fluid in a predetermined direction under pressure through said slit whereby fluid attaches to said foil surface after passage through said slit and whereby said fluid deviates from the predetermined direction and flows along the curvature of said surface due to the Coanda effect away from said slit and ambient air is entrained with said fluid as the fluid flows along the curvature of the foil surface; disposing said fabric closely adjacent to said foil surface and in registry with at least a portion of said surface whereby said fabric and said surface define a restricted and diminishing passageway terminating at an extended nip between said fabric and said surface; moving said fabric relative to said surface and in a path of movement spaced away from said slit and generally at right angles thereto; directing the combined fluid and ambient air flow into said passageway along said foil surface toward said extended nip and thereby creating pressure differentials at said fabric in the vicinity of said nip and passageway with said fluid and ambient air; and utilizing the pressure differentials created by said fluid and ambient air to condition said fabric and remove foreign matter from said fabric. In combination: a fabric movable along a predetermined path of movement in a predetermined direction; and a Coanda nozzle positioned along said predetermined path of movement and closely adjacent to said fabric, said Coanda nozzle extending generally at right angles to the direction of fabric movement and in at least partial registration with said fabric, said Coanda nozzle including a generally smoothly curved Coanda fluid flow attachment foil surface for defining an extended nip with said fabric and for further defining with said fabric a restricted and diminishing passageway terminating at said nip and communicating with ambient air, said Coanda nozzle additionally including a slit defining element defining an elongated slit with said generally smoothly curved Coanda fluid flow attachment foil surface generally at right angles to said fabric and spaced from said fabric, said slit defining element and said generally smoothly curved Coanda fluid flow attachment surface cooperable to direct pressurized fluid exiting from said slit and ambient air entrained thereby along said surface due to the Coanda effect whereby pressure differentials will be created at the fabric in the vicinity of said passageway and nip by the combined fluid and ambient air and at least a portion of said fluid will be forced through said fabric to expel foreign matter therefrom.