Abstract: Workpieces vertically suspended on carrier bars in side-by-side relation are dipped into an electrolyte bath which has a plurality of electric contact plates of alternating polarity spaced along one side. Electric energy is applied to the workpieces from the plates through the carrier bars and the successive work pieces serve as electrodes of opposite polarity, the polarities reversing as the individual carrier bars are advanced from plate to plate.

Abstract: Method for producing colored anodic oxide films on aluminum-based alloy materials comprising steps of subjecting the material having an oxide film thereon to a coloring electrolytic treatment in a bath of electrolyte containing water soluble nickel salt and boric acid. The material is applied with alternating voltage pulses having negative pulse duration which is the same as or greater than duration of positive voltage pulse.

Abstract: A method for inexpensively producing a colored anodized film on aluminum or aluminum alloy material by electrolyzing the aluminum material in a sulphuric acid bath in the presence of a resistivity agent selected from trivalent aluminum ions and oxalic acid, by applying thereto a pulsating electric current having a peak voltage of 25 to 45 volts and a pulse duration of 5 to 70 milliseconds (m.sec.) and a ratio of pulse frequency to pulse duration of between 2 and 7.

Abstract: Aluminum or aluminum alloy scraps or wastes are broken into chips and extruded under a high temperature to produce extruded structural profiles. The method is characterized by the fact that the interior of the extruder is evacuated prior to or simultaneously with the extrusion step so as to exhaust air entrapped in the body of the chips. There is also disclosed apparatus suitable for performing the method.

Abstract: Disclosed is a window sash assembly for use on an exterior surface at a window opening. The assembly comprises a rectangular framework formed by an upper horizontal frame member, a lower horizontal frame member and a pair of vertical frame members. The framework includes a window covering portion facing the window opening and at least one window panel housing portion on the exterior wall surface alongside the window opening. The sash assembly includes at least a pairof window panels which are retractable into the window panel housing portion to fully open the window opening.

Abstract: Aluminum or aluminum alloy scraps or wastes are broken into chips and extruded under a high temperature to produce extruded structural profiles. The method is characterized by the fact that the interior of the extruder is evacuated prior to or simultaneously with the extrusion step so as to exhaust air entrapped in the body of the chips. There is also disclosed apparatus suitable for performing the method.

Abstract: Method for producing extruded structural profiles from aluminum or aluminum alloy scrap materials. The scrap materials are compacted under room temperature or under heat suitable for hot extrusion into a cylindrical body which is of such a dimension that is suitable for insertion into an extruder. The compacted body has an average density which is 70 to 86 percent of that of aluminum, and includes longitudinal air passages. Suction pressure is applied to the interior of the extruder during extruding process for removing air entrapped in the body, which may otherwise cause voids in the extruded products.

Abstract: An apparatus for electrolytically processing aluminium material comprising rectifier means for supplying a pulse power to the electrodes, at least one of which is the aluminium material to be processed, and controller means for supplying a control signal to the rectifier means to enable the same to produce from a multi-phase AC power a pulse power balanced between the phases. The electrodes are connected with each other by a by-pass circuit which is controlled such that the electrodes are short-circuited by the by-pass circuit during the quiescent time of the pulse power to enable the electric charge stored in the electrolytic bath to be discharged rapidly to prevent the trailed natural discharge through the electrolytic path from interfering with the rise of the next pulse, thus preventing the deformation of the pulse waveform supplied to the electrodes.

Abstract: Surface treating apparatus comprising treating bath means; a carrier bar having devices for vertically suspending workpieces; lifting means provided at the sides of the bath means for vertically conveying the carrier bar and dipping said workpieces into and out of said bath means, the lifting means also including means for conveying the carrier bar in a substantially horizontal direction; loading means rotatable between a horizontal and a vertical position and adapted to removably receive the carrier bar having workpieces attached in the horizontal position for loading the carrier bar onto the lifting means in the vertical position; unloading means rotatable between a horizontal and a vertical position and adapted to receive the carrier bar supporting finished workpieces in the vertical position, the workpieces being released from the carrier bar when the unloading means is in a horizontal position; and returning conveyor means between the loading and unloading means so that the carrier bar moves from the loa