(under subclass 93) Device wherein the force utilized is the thrust of gaseous fluid.
(1) Note. The patents herein are for devices which utilize air pressure to facilitate adherence of the material to the material advancer.
SEE OR SEARCH THIS CLASS, SUBCLASS:
97.1+, for apparatus using fluid current to advance the material.
SEE OR SEARCH CLASS
242, Winding, Tensioning, or Guiding, 332.3, 417.1, 419.4, 538+, and 564.3+ for material feeding means or pneumatic structure for winding, tensioning, or unwinding elongated material.
