(under subclass 317) Apparatus wherein the cycle of operation includes rotating a closure member relative to a receptacle in one direction and then in the other direction.
(1) Note. Included here are devices which operate on a receptacle and a previously placed or juxtaposed closure member, inasmuch as the reverse rotation is considered an assembling operation rather than a mere tightening or loosening for Class 81, subclasses 3.1+.
(2) Note. Included here are devices wherein a reverse rotation is for the disclosed, but unclaimed, purpose of facilitating filling or evacuating a receptacle.
