Abstract: This invention relates to an advance and release mechanism for strips of a screwdriver assembly that sequentially drives fasteners retained in a holding strip securing a plurality of fasteners in a row. The apparatus has a slide body with a lateral slot and an intersecting vertical bore. The lateral slot has a uniform transverse cross-section configured to slidingly receive the strip. A driver shaft including fastener driving bit means for engaging and driving a lead fastener in succession into said work piece is journalled and longitudinally slidably housed in the bore between an engaged position and a withdrawn position. Advance means are mounted to the body for incrementally forwardly advancing the fasteners of the strip within the lateral slot in succession and for aligning the lead fastener coaxially with the bore.
Abstract: A cushioning conversion machine (10) comprises a frame (36), conversion assemblies (50, 52, 54, 56) which convert a stock material into a cushioning product, and a length measuring device (12) which determines the length of the cushioning product as it is being produced. The conversion assemblies include a rotating assembly (54) and the angular movement of this assembly directly corresponds to the length of the cushioning product. The length measuring device (12) is positioned to monitor the angular movement of the rotating conversion assembly (54) and thus the length of the cushioning product. In the preferred embodiment, the rotating conversion assembly (54) is a gear assembly.
Abstract: An ophthalmic lens block and lens generating machine compression sleeve chuck are provided such that the block is of diameter suitable for the lens edging step of the lens generating process. The lens generating chuck consists of a plurality of concentric sleeves mounted on a hub of the spindle shaft and having lengthwise slots permitting compression of the sleeve onto the hub and the block. The sleeves are biased to telescope toward the lens so as to abut the front surface of the lens in a concentric pattern extending outwardly from the outer diameter of the block to support the front surface of the lens against the forces applied to the rear face of the lens during the cutting process. Thus, the combination of the block and the chuck is also suitable for the lens generating, fining and polishing steps of the lens generating process. Consequently, after polishing, the block is left on the lens.
Abstract: A soft sanding roller apparatus is provided with a soft compressible sanding sleeve and roller that allows a wide flat to form on the side of the sanding sleeve being pushed against a substrate, such as a piece of wood. The preferred sleeve is backed by a soft deformable layer, such as a soft foam layer, which allows the sanding sleeve to conform to the surface of the substrate without chattering or digging into the substrate. The sleeve has a bore diameter smaller than the uncompressed diameter of the soft foam layer so that the foam layer exerts an even force on the cylindrical sleeve to retain its cylindrical shape. The sleeve is driven by a connection such as a one-way clutch between the sanding sleeve and the foam layer on the roller. The roller is rotated in one direction by a motor to do sanding with the one-way clutch driving the sleeve. The sleeve is removed by turning it in a direction opposite to the sanding direction and pulling it axially against the force from the compressed foam layer.
Abstract: A grind-machining method of ceramic materials characterized in that a peripheral speed of a grinding wheel relative to a working surface is set to 50 to 300 m/sec, a feed stroke speed of the working surface of the grinding wheel in a working direction is set to 50 to 200 m/min, and preferably, a down-feed speed of the working surface of the grinding wheel in a direction orthogonal to the surface of the workpiece is set to 0.05 to 3 mm/min. The grind-machining method of ceramic materials can reduce a grinding force at the time of grinding of ceramic materials and residual defects due to machining, and at the same time, can accomplish high machining efficiency.
Abstract: Sharpening the cutting edge of a chipper knife having a chip-breaking shoulder in its underside remote from the cutting edge apex which is integral with the chipper knife is effected by removing a layer of material of uniform thickness from the underside of the cutting edge and thereby removing the bluntness of a dulled cutting edge and forming a resharpened cutting edge having the same wedge angle as the cutting edge prior to resharpening.
Abstract: A spring tightener includes a central tube assembly which includes a cylindrical guide tube having a lower end with a seat bushing having an axial thrust bearing in which a flange ring at the lower end of a threaded spindle is positioned for securing and rotatably supporting the spindle. A coupling tube is telescopically movable in the guide tube and the device includes a cam engageable with a slot of an adjacent tube for the positive locking guidance of these tubes. A threaded tube is connected to the outer end of the coupling tube and it is internally threaded and in threaded engagement with a spindle which is journalled in the seat bushing of the guide tube. A first pressure plate is provided with recesses which engage against outwardly extending radial fingers of the threaded tube and a second pressure plate is mounted over the cylindrical guide tube and bears against a bearing surface at the lower end of the guide tube.
Abstract: Apparatus for polishing a side of a thin, flat wafer of a semiconductor material includes first and second polishing heads which each hold a wafer against a wetted polishing surface and which each rotate and oscillate its respective wafer over the polishing surface. When the first polishing head is moved away from the polishing surface to clean, eject, and replace its wafer, the second polishing head occupies the space over the polishing surface normally occupied by the first polishing head so that the polishing surface is used substantially continuously, and not intermittently.
Abstract: An abrasive blasting apparatus is provided which comprises a blast nozzle arranged in a blast chamber for blasting, toward a workpiece, two different kinds of abrasive particles separately supplied from a first abrasive container and a second abrasive container. The abrasive particles falling to the bottom of the blast chamber are collected by an abrasive collector, and the collected abrasive particles are separated by an abrasive separating system into those of the first abrasive material and those of the second abrasive material. The two different portions of the abrasive particles are returned separately to the first and second abrasive containers through feedback conduits.
Abstract: In a grinding method wherein a rotating workpiece and a rotating grinding wheel are relatively moved toward and away from each other and wherein at least three of rough, fine and finish grinding step are performed successively at high, medium and low infeed rates respectively for grinding the workpiece, the grinding wheel is retracted to a back-off position at the end of the rough grinding step.
Abstract: Buffing apparatus including a buffing assembly including a stack of buffing wheels with or without spacers between the rings, compressed under high pressure. Each wheel includes a clinch ring which in turn secures an annulus of fabric extending radially therefrom. Each spacer includes a ring; they may be the remnants of used buffing wheels. The wheels and spacers, if any, are contiguous forming an inner cylindrical surface of the rings. Steel straps extend axially along this inner surface, the straps being secured by metal inert-gas welding to the rings at the ends of the stack. The pressure between the buffing wheels and any spacers of the stacks is so high as to suppress any tendency of the wheels or spacers to slip circumferentially with respect to each other when the stack is under high tangential force in use. The straps serve to be engaged by the keys of a drive shaft to drive the buffing apparatus.
Abstract: A container assembly for a sharpening stone which can be converted from a package for transport and display into a pedestal for supporting and exposing the sharpening stone for use. The assembly is formed of a sheet of polymeric material having a plurality of panels joined by living hinges. A generally box-shaped package can be formed for containing the sharpening stone by folding the panels in one direction and joining end flaps and panels by the use of detents. A pedestal for exposing the sharpening stone can be formed by folding the respective panels on the assembly in the opposite direction and joining into a box-shaped configuration with the use of the end flaps, panels and detents.
Abstract: A tool grinding machine which can grind the cutting edge of a punch without disassembling the punch body from the punch assembly and further can grind the cutting edge of the upper surface shoulder portion of the die. Further, the punch and die of various shapes can be ground easily by selecting an appropriate previously stored operation mode determined according to grinding conditions. The tool grinding machine is made up of a rotary table rotatably disposed on a slider supported on a base movable in the right and left direction; and a grinding tool disposed axially away from the rotary table and rotatable and movable in an axial direction of the rotary table, for a grinding workpiece fitted on the rotary table.
Abstract: A carriage 3 is movable in a feed direction A on guideways 1, and carries an ultrasonic machining device 4, 5 loaded with an adjustable force in the feed direction by a first fluid cylinder 7. A cylinder 15 is attached to the carriage, around which is looped 16 a rope 17. One end 18 of the rope is preloaded by spring 20 against a stop 21 which is attached to a frame 2. The other end 22 of the rope is attached to the piston rod 24 of a second cylinder 25. By means of the second cylinder the tool 5 can be lifted or retracted from the workpiece 6 during the machining operation, independently of the position of the carriage. After the tool has been lifted off, the tool touches down gently again on a renewed abrasive layer.
Abstract: A method and apparatus for improved control of polishing in chemical-mechanical polishing operations is provided. The polishing is controlled by applying different amounts of pressure to the surface of a substrate during polishing. A polishing pad which includes raised portions is used to apply the varying amounts of pressure. In addition, the position, size and height of the raised portions is used to affect the amount of pressure applied.
February 23, 1995
Date of Patent:
September 24, 1996
International Business Machines Corporation
Abstract: An abrasive blast cabinet includes a housing defining a blast chamber, a blast nozzle disposed in the blast chamber and connected to a source of an abrasive blast media for directing a flow of the blast media against a surface of an article to be cleaned, an elongated chute supported in the interior of the housing and having a first open end in fluid communication with a gas supply, a rotatable second open end in the vicinity of a work place for the article and an opening placed adjacent a window in the housing so that an operator located outside the blast chamber can direct his or her line of sight through the window and second rotatable open end and observe the article in the work place.
Abstract: A pneumatic mechanism for the application of uniform pressure to a mechanically adjustable spindle. The mechanism includes a support shelf with a double-acting piston attached at its non-pressure end to the support shaft. A cylinder receives the piston for telescopingly sliding movement of the piston relative to the cylinder. A lifting stop rod is connected to the pressure end of the piston and an externally threaded tube engages the pressure end of the piston and telescopingly receives the lifting stop rod. A worm wheel engages the threaded tube and a worm gear engages the worm wheel. A hand wheel is connected to the worm gear for rotating the worm gear and the worm wheel. An adjustable connection is provided between the lifting stop rod and the threaded tube permitting limited stop movement of the lifting stop rod by the piston relative to the threaded tube.
Abstract: An in-line sander comprising a sander body which houses a motor coupled to an in-line oscillating mechanism. The in-line oscillating mechanism is adapted and configured to move a sanding pad in a linear oscillating motion.A preferred pad is a profiled sanding pad coupled to the in-line oscillating mechanism. The profiled sanding pad has, in a plane substantially perpendicular to the linear oscillating motion of the sander, a particular cross sectional profile corresponding to a profile to be formed onto or to be sanded on a workpiece. The cross sectional configuration extends substantially consistently along the length of the pad, and the pad defines a sanding surface having a profile corresponding to the particular cross sectional profile. With such profiled sanding pads, sandpaper secured to the sanding surface of the pads will power sand the profile to be formed onto or to be sanded on a workpiece.
February 9, 1995
Date of Patent:
September 10, 1996
Donald R. Bosten, John R. Kriaski, Randy G. Cooper, John C. Smith
Abstract: A vertically stacked planarization machine includes two or more vertically stacked individual platens on which wafers are polished. The wafers are held by wafer holders which may rotate the wafers. The individual platens are also orbited in order to polish the wafers. The platens may have a top and bottom polishing pad for polishing multiple wafers. A single wafer holder, using hydraulic or pneumatic means, between two platens will hold and exert pressure on both a downward wafer and an upward wafer. The pressure exerted onto the top and bottom wafers by the dual wafer holder is designed to be equal to prevent any bowing of the platen. The platens are supported by three vertical members positioned at 120 degree intervals around the circumference of the platens to form a platen stack. Transport elevators are used to carry the wafers to and from the wafer holders and the platens.