Abstract: The invention provides an improved apparatus for grinding longitudinal ends of the cutting edge to a desired degree of superfine finish as a grinding wheel reciprocates between the ends. The apparatus applies a relatively constant pressure to the grinding wheel, thus allowing stable and desirable grind.

Abstract: A rotary tool for cutting, drilling, grinding, or polishing metallic or non-metallic materials is made of a compact material, which consists of an inorganic fiber reinforced plastic containing 50 to 81 volume % of inorganic long fibers selected from the following group: alumina fibers, boron fibers, silicon carbide fibers, and silicon nitride fibers, the remaining portion of the compact material consisting of a thermosetting resin matrix.

Abstract: The invention relates to a cutting tool having twisted edge in a blade part, having a sintered compact with higher hardness and higher wear resistance than a base sintered body buried and affixed along the twisted edge, and its manufacturing method. The blade part of the cutting tool comprises the base sintered body having a twisted groove in the position of forming the twisted edge on the outer circumference, and the sintered compact of high harndess and high wear resistance applied and buried in the twisted groove and affixed to the base sintered body by sintering, and the twisted edge is formed on the sintered compact of high hardness and high wear resistance.

Abstract: A folding and depositing device for drawings provided with legends, comprising two folding stations for folding drawings in two directions at right angles to one another and a collecting station for depositing the folded drawings with their legends on the same side such that the folding stations fold drawings of a first group of formats (A1 and A2), first in the longitudinal direction and then in the transverse direction, and fold drawings of a second group of formats (A0 and A3), first in the transverse direction and then in the longitudinal direction and, depending on the group to which they belong, the folded drawings are directed via different discharge paths from the second folding station to the collecting station, and wherein an intermediate transport path between the folding stations is accessible via a routing switch to enable a subsequent drawing to be folded in the first folding station while a previous drawing is being transversely transported to the second folding station.

Abstract: An apparatus and process for the attachment of a bayonet handle having a barb head defining each end thereof to a carton blank. The apparatus comprises releasable clamping means for horizontally gripping the handles. Below the clamping means are support means for flatly maintaining carton blanks. A pair of blades, situated juxtaposed opposite sides of the clamping means, are retractable between an upward retracted position and a downward extended position near the support means. The clamping means are movable between an upper handle receiving position and a lower position near the support means by descending means.The process comprises first providing a bayonet handle. The handle is next bent in two places so that the barb heads are perpendicular to an interior section of the handle and are projecting toward respective apertures in the carton blank. Then, the handle is moved such that the barb heads are inserted into the respective apertures.

Abstract: The disclosed fixture has a main clamping piece defining several differently sized smooth bores, the locations and sizes of which are selected to receive and hold different central mounting mechanisms of incompatible cutting tools, with the intended cutting edge on each cutting tool then spaced beyond and clear of the clamping piece. A stop is provided in accurate vertical registry with each bore, allowing the fixture to be secured to a grinder bed and located accurately relative to the grinding wheel, before the cutting tool is mounted thereon and any sharpening begins. Before being tightened down, the cutting tool can be rotated selectively in the fixture to accurately set where the grinding wheel will sharpen the cutting edge, and a second clamping piece then secures the cutting tool rigidly in the fixture. Special mounting pins cooperate respectively with the different cutting tool central mounting mechanisms to hold the different cutting tools relative to its proper fixture bore.

Abstract: An inside diameter blade has an annular plate and a layer of abrasive grains deposited on an internal circumferential portion of the annular plate. The thickness of the internal circumferential portion of the annular plate is set to no greater than 1/5,000 of its outer diameter. The tensile strength of the annular plate is set to no less than 230 kgf/mm.sup.2.

Abstract: A method for machining a high temperature nickel based alloy workpiece or other difficult-to-work material. The method involves machining the workpiece at an effective cutting speed of up to about 1500 sfm per minute, moving a ceramic-metal cutting tool across the face of the workpiece at a rate of up to about 0.04 in/rev, and cutting the workpiece with the ceramic-metal cutting tool to effect a depth of cut of up to about 0.15 inches per pass. The ceramic-metal cutting tool has a density of at least about 95% of theoretical, and includes about 80-98%, preferably 88-96%, by volume of granular hard phases and about 2-20%, preferably 4-12%, by volume of a metal phase. The granular hard phases are (a) a major hard phase portion of alumina and (b) a minor hard phase portion of hard refractory metal carbides, nitrides, carbonitrides, and borides.

Abstract: A tube positioning apparatus has at least one mandrel for positioning tubes for processing. A variable tube positioning stroke length is facilitated for optimizing stroke length and for optimizing the time required to position and process tube, such as by cutting. The tube positioning apparatus comprises a slide block having a mandrel attached thereto. The slide block is actuated on a plurality of slide rails from a first position to a second position. In the first position, the mandrel is retracted and in a second position the mandrel is extended for access by processing tools, such as circular knives for cutting the tube into desired lengths. A programmable sequence timer is provided for establishing desired time intervals during which the slide block and attached mandrel are in the retracted position or the extended position.

Abstract: An apparatus for producing driving belts is improved with regard to an increased production speed, reduced energy requirements for each belt produced, and increased environmental compatibility. A semifinished belt is clamped on two rolls and is provided with a profile by means of a grinding tool containing an abrasive. The grinding tool is cooled internally whereby dry grinding can be effected, as opposed to previous wet grinding processes and the inherent disadvantages thereof.

Abstract: The method and apparatus treat a surface of natural rock or artificial stone-like material to give to this surface an attractive finish. A high temperature jet of plasma and a high speed jet of cooling fluid are projected onto the surface to be treated. The two jets are moved on the surface at a given speed with the jet of cooling fluid following the plasma jet. The speed of movement is selected so that the high temperature plasma jet heats only a thin superficial layer of rock or stone-like material. As the jet of cooling fluid follows the jet of plasma, it suddenly cools the thin superficial layer just heated by the plasma jet to cause a thermal shock which bursts particles of rock or stone-like material at the surface thereof, and blows these particles off the rock surface.

Abstract: A two-piece belt sander mounting block and guard assembly is provided which permits the mounting of the belt sanding attachment to a handheld power tool. The guard is separate from the mounting block and is attached thereto permitting variations in materials and guard design to effect economies in materials and manufacture while improving the respective functions of the mounting block and the guard by both material selection and design function.

Abstract: A stand (10) that includes an upwardly projecting support member (24) shaped into wedge portions (36, 38), each wedge portion configured to fit within the groove (18) formed in a conventional holder (14) for a lathing tool. The stand (10) provides a compact and convenient mechanism for storing holders that are not fastened to the lathe.

Abstract: A method and apparatus for profiling a grinding wheel (12) used to grind a workpiece (6) includes selectively feeding the grinding wheel radially against a dressing roller (19) to dress the wheel. Between successive dressing operations, the dressing roller (19) is conditioned with a conditioning wheel (50) movable radially thereto. Either the dressing roller or the conditioning wheel is movable axially relative to the other. The dressing roller (19) makes linear contact with the grinding wheel (12), and makes pointwise contact with the conditioning wheel (50). The relative radial and axial movements between the conditioning wheel (50) and the dressing roller (19) are synchronized by program control.

Abstract: The unit to dispense wiping materials stored in roll or Z-folded form and delivered in the form of concertina-folded strips is outstanding in that it is fitted with a dampening device (N) the active part of which is arranged so as to periodically have an effect on the tension of the strip between the storage point of the roll and the return and forming means (H) and automatically form, after every dispensing operation of a folded strip by pulling the projecting strip and rotating the roll of material, a loop (b) of unrolled material which is taken up when the next strip is pulled thus preventing any undue tearing of the material.

Abstract: A new and improved method and apparatus for polishing optical lenses using free-flowing polishing fluid (23) passing across a flexible permeable membrane (1). The free-flowing polishing fluid (23) forces the permeable membrane (5) to conform to the shapes and curves of an optical lens (2), polishing and cooling the lens (2) at the same time. In addition, the free-flowing polishing fluid (23) continually replenishes the polishing compound of the polishing fluid (23) during the polishing process.

Abstract: In a method of cutting a workpiece of brittle material with a wire by using a machining solution containing abrasive grains, the workpiece is pushed against the wire from above, and a machining solution pooling vessel is disposed below the workpiece, to immerse the cut portion of the workpiece in the machining solution in the vessel, and an ultrasonic oscillator is provided for the machining solution pooling vessel to apply ultrasonic waves to the machining solution during machining, whereby difficulties that the machined surface is scratched or cracked by the abrasive grains, and the machining solution is deteriorated in cutting capacity are eliminated, and the machining accuracy and efficiency are improved.

Abstract: A hand-held sand blasting device, which is particularly useful for treating mall surface areas, such as tooth faces in situ, includes a sand cartridge 20 adapted to be placed in a handle portion 10 of the device and rewardly sealed by a piston 34 which is adapted to be advanced by pressurized air. Part of the pressurized air flows along a longitudinal groove 25 formed in a wall of the handle portion 10 externally of the cartridge 20 and enters the cartridge through an opening 27 provided at a front portion thereof, where the relatively large cross-section of the main portion of the cartridge converges to the substantially smaller cross-section of a feed channel 28. The fine sand 21 is thus fluidized in this area and maintained flowable. Through the feed channel 28, the sand is supplied to a mixing chamber 30 where it is mixed with pressurized air and discharged through a nozzle pipe 33.

Abstract: A coating removal machine or carriage (22) for a pipe (10) has an enclosed housing (44, 46, 48, 50) extending about front and rear tool carriers (74, 76) which rotate in opposite directions about the pipe (10) and have coating removal tools (116, 118, 120) for removing the coating material from the pipe (10). The removed coating material (12) is collected in removable bags (66) beneath the machine (22) for disposal at a separate remote disposal site. A dust collector (28) has a vacuum line (32) extending to the enclosed housing (44, 46, 48, 50) to remove minute coating particles which are suspended in air or air borne. One embodiment (FIGS. 10 and 11) is provided for a fixed installation. Another embodiment (FIGS. 13-15) includes water under pressure discharged from nozzles (63B) to remove the coated material (12) from the pipe (10).

Abstract: A dental curet and sharpening machine has been developed for complete mechanical guidance of the instruments during the sharpening procedure. Double-ended dental curets comprising cutting blades, shanks, and a handle have been designed so that regardless of the instrument's rake angle, the arc center of the toe on the face of the cutting blade which is to be sharpened lies on the longitudinal center axis of the instrument and at a constant distance from the reference points on the instrument handle. The sharpening machine comprises a base, an electrical motor with a rotating sharpening stone, and an instrument guide unit. The instrument guide unit can position the blade face of a curet of any rake angle in a horizontal plane with the arc center of the toe on the blade's face coincident with a vertical axis about which the guide unit is swung while the blade is engaged with the rotating stone during the cutting procedure.