Abstract: A perfect binder wherein the grippers of a transporting unit advance discrete stacks of paper sheets along a horizontal path past a series of successive treating stations from a stack receiving location of the grippers are located in a common plane, and those portions of the stacks which require treatment extend downward beyond the respective undersides. A second unit of the perfect binder includes a set of treating devices (which can include aligning panels, milling tools, grinding tools, adhesive applicators and cover applicators) which are mounted on a platform beneath the path for the stacks and are individually adjustable toward or away from the common plane. In addition, the perfect binder is provided with an apparatus which can move the transporting unit and/or the second unit toward or away from the other unit in order to simultaneously alter the spacing of all treating devices relative to the common plane.

Abstract: A disposable hair clipping head assembly adapted for attachment to an electric clipper is disclosed. The assembly is characterized by a novel two-piece construction including fixed and movable members formed of synthetic plastic material. The fixed member includes a base and an integral spring having a portion thereof extending in parallel spaced relation from the base. One edge of the fixed member base contains a plurality of teeth. The movable member is arranged between the spring and base of the fixed member, with the spring serving to retain the movable member which is adapted for reciprocal movement relative to the base. One edge of the movable member also contains a plurality of teeth which are arranged adjacent the teeth of the fixed member. The fixed member also includes a pair of lugs integrally connected with the spring, the lugs being adapted for interlocking attachment to the electric clipper.

Abstract: An improved twist drill sharpening machine for sharpening two lip twist drills having a base, a chuck for chucking a drill bit W to be sharpened, and a grinding wheel spindle supported on the base, a grinding wheel fast on the spindle, the grinding wheel having a concave grinding surface profile on its periphery, an arrangement for moving the chuck and grinding wheel relative to each other so that the grinding wheel carries out metal removal grinding operations on the drill bit W for sharpening same, and the drill bit W being incrementally in-fed to the grinding wheel on an axis parallel to the grinding wheel axis while held disposed at an acute angle to the in-feed axis, an arrangement for flip-flopping the chuck and drill bit W through 180.degree. rotational arcs of travel during in-feed of the drill bit W, an arrangement for cushioning the chuck and drill bit W at the ends of the 180.degree.