Abstract: An apparatus for polishing the notch of a wafer in an effective and efficient way, which comprises: a flexible tape carrying abrasive grains in the working face thereof; an infeed reel for feeding the tape stored thereon: a take-up reel for taking up the tape fed from the infeed reel; a motor for driving to rotate the take-up reel; a means for blowing a fluid to the backside surface to the edge portion of the notch to be in direct contact along the full periphery of the notch; and a means for oscillating the tape sideways.

Abstract: A pair of pliers includes a handle member having an intermediate portion slidably engaged in an intermediate portion of another handle member which has a rack located close to the handle end. A pawl is pivotally secured on the handle member for engaging with the rack so as to secure the intermediate portions of the handle members together when the jaw ends are engaged with the workpiece. The intermediate portions of the handle members have no slots such that the strength of the handle members can be greatly increased.

Abstract: A hand tool for performing an axially reciprocating operation on a workpiece includes a rigid drive member having a longitudinal axis and a coupling formation for releasably securing one of a plurality of task-specific attachments, the coupling formation configured for engaging the attachments along the axis, and a handle portion operatively connected to said the member for grasping by a user to apply force to a workpiece through the drive member to perform an operation thereon. The drive member may be reciprocated manually or by a motorized mechanism. The coupling portion of the drive member secures the attachment against unwanted axial movement. The attachment exerts a clamping force on the drive member.

Abstract: There is disclosed herein an adapter system for use with a hand-held electrically-driven grinding tool, which rotatably drives a grinding wheel for removing grout or mortar from a work site. The adapter system is constructed to controllably deliver a liquid, usually water to the grinding wheel. The adapter system includes a valve assembly mounted to the tool body, which assembly includes: (1) a housing which defines an inlet and an outlet and (2) a shut off valve member positioned within the housing and between the inlet and outlet and operable from external of the housing to selectively provide and interrupt communication between the inlet and the outlet. There is also provided a supply conduit leading from a source and connected to the inlet for delivering liquid from the source to the valve housing inlet. A flexible delivery conduit is provided and connected to the valve housing and positionable adjacent to periphery of the grinding element.

Abstract: A self-contained mobile painting and maintenance platform for recovery of steel grit blast media used in the pressurized cleaning of bridge structures prior to repainting. The painting and maintenance platform is positioned on vehicle with deck extensions that expand to form a large barrier free support and recovery surface and collection troughs to recover spent grit and shot via independent auger systems within the troughs.

Abstract: The present invention relates to a method of texturing a rigid disk for magnetic media applications, using a coated abrasive article comprising a backing having at least two regions of abrasive coating bonded to one side of the backing. The at least two regions of abrasive coating have different abrasive natures.

Abstract: A tool for engaging a bolt or nut in confined and obstructed locations. In a first aspect of the invention the tool has an elongated body having a straight portion and an adjoining loop-shaped end portion. A plurality of thin resilient wires are arranged around the loop-shaped end portion and are joined to the loop-shaped end portion with a wire which is tightly coiled around the loop-shaped end portion. A thin plate is joined to the loop-shaped end portion to form a pocket for receiving a bolt or a nut. In the second aspect of the invention, a slender elongated wire body has a straight portion and opposite alternate size loop-shaped end portions. A plurality of thin wires are joined to the body's loop-shaped end portions and extend inwardly toward the centers of the loop-shaped end portions.

Abstract: The present invention relates to improvements in devices for use as grinding cups for grinding the hard metal pins or working tips of drill bits and more specifically, but not exclusively, for grinding the tungsten carbide cutting teeth or buttons of a drilling head and the means for detachably connecting the grinding cups to the grinding machine. The grinding cups consisting of a bottom grinding section and a top body section having top and bottom surfaces. The grinding section is formed from a material capable of grinding the tungsten carbide button bits such as a metal and diamond matrix. The peripheral edge in the bottom surface may be bevelled to facilitate the removal of steel from the face of the bit around the base of the button during grinding. A centrally disposed convex recess is formed in the bottom surface having the desired profile for the button to be ground. The body section has a centrally disposed cavity formed in the top surface of the grinding cup.

Abstract: The invention relates to an arrangement for a mobile surfacing machine, preferably for the surfacing of stone floors. A frame supports a drive motor with a motor shaft. A planet disc is rotatably mounted in the fame, with three surfacing discs arranged on shafts rotatably mounted on the planet disc. The surfacing discs are in operative connection with a belt pulley arranged on the drive shaft of the motor via a drive belt running around first belt pulleys arranged on the aforementioned shafts. The shafts of the surfacing discs are so arranged, for the purpose of controlling the rotation of the planet disc, as to be in operative connection with the frame. The operative connection comprises, for example, a belt pulley attached to the frame, second belt pulleys arranged on the shafts of the surfacing discs, and a second belt running around these and the belt pulley attached to the frame.

Abstract: An internal diameter saw, and in particular a method for operation which facilitates the maintenance of quality control of semiconductor wafers sliced from an ingot of source material. The internal diameter saw has a controller which monitors the deflection of the cutting edge of the blade at a location within the ingot as a wafer is sliced. Depending upon the deflection of the blade which is detected within the crystal, a blade dressing device is automatically activated to sharpen the blade following the cut.

Abstract: Lofty, low density nonwoven pads and a process for the manufacture of such pads are described. The pads of the invention each comprise a bundle of discontinuous fibers bonded to one another at their mutual points of contact. The fibers are arranged within the bundle to provide a dense longitudinal central portion extending to opposite ends of the bundle, less dense side portions, a longitudinal tensile strength and a transverse tensile strength, wherein the longitudinal tensile strength is greater than the transverse tensile strength. The pads are made according to a process comprising forming a tow of discontinuous fibers so that the fibers are arranged within the tow to extend along a first axis, twisting the tow along the first axis to form a slubbed tow, bonding the fibers to one another at their mutual contact points and cutting the slubbed tow into scouring pads and the like.

Abstract: A power tool for surface treatment comprises a housing, a motor accommodated in the housing, a tool holder, a tool supported in the tool holder and driveable by the motor, the tool having a substantially triangular base surface for receiving a substantially triangular grinding sheet, the tool holder being shell-shaped and having a substantially triangular contour substantially corresponding to the base surface of the tool, and also having an outer edge abutting on the tool.

Abstract: A focusing nozzle for producing and jetting a precisely focused, sustained cohesive jet of a mixture of a fluid and abrasive material, having a long coherence length and a prolonged centerline pressure for obtaining clean, precise, sharp-edged kerfs, cuts and grooves in hard substances.

Abstract: Current pole mounted vacuum sanders have universal connections between the pole and sander which permit the sanding pad to lift off the sanding surface when pressure is applied. The present invention provides a universal connection between the pole and base of the vacuum hand sanding device which allows the head to be semi-locked into position when the pole is angled to the working surface to prevent the pad lifting from the surface.

Abstract: Sanding accessory for a conventional belt sander or the like, enabling manually held workpieces to be sanded to a super-smooth finish without rounding off their edges. A workpiece held by hand sideways against a fence parallel to the direction of travel of the belt moves forward by belt friction to a crosswise face of the fence and is retained there as the fence reciprocates laterally across the belt and back, sanding the workpiece evenly and distributing the belt wear uniformly over substantially its entire abrasive surface.

Abstract: A device for cleaning or polishing a roll (4), mounted for rotation about an axis and comprising a cleaning roller (41) mounted for rotation on a support device comprising two parallel arms (15, 16) extending, respectively, between an inner end (15a, 16a) and an outer end (15b, 16b), and which can be moved between a position in which the roller (41) is applied against the roll (4) and a retracted position, and an arrangement for controlling the rotation of the roller (41) about its axis x'x. The outer ends (15b, 16b) of the two support arms (15, 16) are articulated about an axis y'y parallel to the axis of the roll (4) respectively on two fixed, aligned bearings (7, 7') which are simultaneously pivotable about the axis y'y in order to apply the roller (41) against the roll (4).

Abstract: A combination fence and table for use with a power tool provides means for rotating a plate from a table position to a fence position. The plate also is tiltable with respect to the base of the apparatus. The edge of the plate closest to the power tool remains at a substantially constant distance from the power tool throughout the range of angles that the plate is tilted. When used in the fence position, the plate is movable linearly across the width of the power tool.

Abstract: A high speed knife sharpening apparatus where the surface of a first rotating abrasive element is that of a truncated cone and forms a first facet with microgrooves and a microburr. A second stage is a novel composite cone shaped honing wheel made up of a micro abrasive imbedded in an epoxy matrix. The honing wheel refines the edge developed in the first stage, into an erect triangular shape with a radius of curvature, at the apex (edge), of typically several microns or less depending on the hardness of the knife steel. A unique blade holding system constrains the blade to a precisely defined angle relative to each of the grinding (first) and honing (second) stages. Proportionately larger grinding forces are developed for thicker knife blades, thus sharpening times are approximately the same over the common range of knives from small paring knives (6"), large chef's knives (10") up to kitchen cleavers.

Abstract: In accordance with the present invention, there is provided a profiler device having a linear drive mechanism with enhanced tool holder support to effectively guide the substantially linear reciprocating movement of the tool holder so to maintain accuracy during machining operations and to extend the life of the tool and the device. The linear drive mechanism includes a reciprocating sleeve guided for substantially linear movement in a main guide sleeve, which is fixed to a profiler housing. The main guide sleeve includes a square socket formed in one end for receiving a square end of the tool holder. The surfaces of the square socket and the square end slidably engage one another for guiding and supporting the tool holder. The square end of the tool holder also includes a central bore which receives with a friction fit one end of reciprocating sleeve for being driven linearly with the reciprocating sleeve.

Abstract: Disclosed is a method of polishing a thin film layer to be polished, which is formed on the surface of a substrate, by pressing the substrate on the surface of a polishing pad and relatively moving the substrate and the polishing pad, the method comprising the steps of: detecting the position of a front surface of the thin film layer to be polished using a first sensor and also detecting the position of a bottom surface of the thin film layer using a second sensor, on the way of the polishing; calculating the residual thickness of the thin film layer on the basis of the detected positions of the front and bottom surfaces of the thin film layer; and controlling the processing condition of the subsequent polishing on the basis of the calculated residual thickness of the thin film layer.