Abstract: A barrel-type finishing machine provides the fully automatic functions which permit the finishing process such as surface finishing, radiusing, gloss polishing, etc., and other associated operations to be performed for each succeeding cycle of the sequence of those operations. The machine includes a dual barrel structure consisting of an upper stationary container of a cylindrical shape and a lower rotary shallow container of a tray shape which are partly or wholly movable up and down relative to each other; and an annular mass receptacle trough surrounding close to the dual barrel structure and including means for causing the mass receptacle trough to be moved up and down, means for separating the mass into workpieces and abrasive media, means for returning the abrasive media for reuse, and vibration generating means for placing the mass collector conduit under vibration, means may be included for controlling the toroidal flow of the mass inside the dual-barrel structure by producing a centrifugal force.

Abstract: A vibratory barrel finishing machine comprises a single or multiple barrel arrangement of an elongated elliptical form in plan view including semicircular barrel sections at the opposite ends thereof and straight longitudinal barrel sections running in parallel and connecting between the opposite semi-circular barrel sections, the semi-circular barrel sections having descending-slope path in the direction of the flow of a mass (a mixture of unfinished workpieces and abrasive media) and straight barrel sections having ascending-slope path in the direction of the mass flow. The machine further includes workpiece guide means or workpiece advance control means which both provides the constant and smooth travel of the mass, particularly around the corners of the barrel structure, thus preventing the individual workpieces from impingement each other.

Abstract: A vibratory plating method carried out by placing only workpieces and a plating liquid in a plating container, and applying an electric current across the plating liquid while vibrating the plating container so as to cause the workpieces to be plated as the workpieces are rolled and moved independently of one another along the plating container. By this plating method, workpieces can be plated uniformly in a very short period of time at a high current density and with a small amount of plating liquid. Moreover, it eliminates troublesome steps of manually suspending and removing workpieces from hangers.

Abstract: A method for finishing workpieces which are caused to flow in a helical motion together with abrasive media within a circular vibratory finishing tub in the form of a hollow annulus closed at both ends, and more particularly for vibratory finishing of workpieces together with abrasive media in a heavily compressed condition and for separating the mass (a mixture of workpieces and abrasive media) into workpieces and abrasive media.