Abstract: A method of numerically controlled grinding for forming a curved profile on a workpiece. A rotary grindstone having an arc-shaped grinding periphery. The rotating grindstone is moved along the target profile of the workpiece as keeping a constant attitude thereof as far as such a condition is satisfied that the spotty contact of the arc-shaped periphery of the grindstone to the target profile is maintained. Immediately before the satisfaction of the condition expires, the attitude of the grindstone is reset to satisfy the same condition.

Abstract: A tool device has a toolholder and a profile tool detachably secured to this, both of which comprise stops cooperating with one another for the precise positioning of the cutting profile of the profile tool relative to the toolholder which can be mounted on a machine tool, the stops being constructed in the form of mating surfaces. At least one adjusting element is provided between the toolholder and the profile tool to bring the profile tool to bear on the mating surfaces on the toolholder.

Abstract: A fastener driving apparatus is disclosed and which includes a fastener driving device into which fasteners are sequentially introduced from a feed assembly. The driving device incorporates a control member which regulates the timing of the introduction of fasteners into the device, and which also limits longitudinal and rotative relative movement between fixed and movable concentric, slotted barrel members of the device. The control member is mounted by a pair of guide tracks, each having abutment surfaces at adjacent ends thereof, for longitudinal movement into and out of engagement with the abutment surfaces and the actuating lever of a control switch.

Abstract: A basic tool holder for attachment in an accommodating recess of a tool support, particularly a turret head, with a base part, to which can be attached a work-holding device by one or several clamping means, between which the tool is clamped. A component of the clamping force, directed radially towards the tool support, is produced by at least one abutment face between the base part and the work-holding device forming a wedge-shaped incline for the clamping means.

Abstract: The invention relates to an indexable cutting insert for face milling of engine blocks of cast iron. The insert has a free surface and a clearance surface and a cutting edge extending peripherally about the insert. The corners of the insert have a relatively large radius and therefore the setting angle gets close to zero degrees during machining of the engine block when the insert gets close to the border line of the work piece. The free surface and the clearance surface enclose an acute angle and therefore the insert has a positive cutting geometry. A land is provided between the free surface and the cutting edge. The land has a width increasing towards each insert corner.

Abstract: Process for loading and unloading the main spindle of a lathe which comprises a turret provided with at least two drivable auxiliary spindles and which is combined with a workpiece handling device, wherein in order to shorten the machining time, the rotating main spindle is loaded and unloaded with the aid of the auxiliary spindles driven at the same rotational speed as the main spindle, and the auxiliary spindles are loaded and unloaded by the workpiece handling device when they point in the upward direction.

Abstract: An improved on-edge cutting insert with chip control features and a method for manufacturing the same. An insert body having peripheral end wall regions, sides and first and second walls has cutting edges and is adapted for mounting in a pocket of a toolholder assembly. A land region extends rearwardly from the end wall region and defines a surface region of a predetermined width. A descending wall initiates in a portion of the land and terminates in a planar floor region having a forward, a rearward and opposed side edges. A back ramp extends upwardly from the planar floor rearward edge and terminates at the respective top or bottom wall. The end wall region can include at least one flat land region adjacent the land region. The flat land region defines a selectively removable portion of the end wall region and after my selective removal thereof represents no more than approximately one-third of the total eidth of the end wall region.

Abstract: A disposable or reusable and reclosable gussetted plastic bag capable of being compactly stored as a food container in freezers, yet capable of standing with an upright spout in a microwave oven for non-spill thawing and cooking of food contained in the bag. The bag is formed of two wing-shaped pouches on either side of the upright spout. The bag preferably has inner and outer skin layers of different heat sealing temperatures so that peripheral sealing is effected only with the inner skin layers, allowing the wing-shaped pouches to be formed out of a gussetted bottom without sealing of the outer skin layers of the gusset walls facing one another. Two pairs of relief seals are located adjacent each gusset joint at both edges of the bag. Each seal is positioned 45.degree. off the gusset joint and preferably has a radius shape. The heat seals are formed by applying heat adjacent each gusset joint with a hot bar or other heat sealing device following formation of the bag.

Abstract: A technique for sawing substrates on a chuck wherein the substrate is secured to a layer of a first sawing tape, and is placed on the major surface of a chuck with a second tape therebetween. The second tape comprises both a first major surface with a low surface tension effect that is in contact with the major surface of the chuck, and a multitude of perforations or pinholes therein. Vacuum is applied to both the channels in the major surface of the chuck and the pinholes in the second tape, to securely hole the substrate to the chuck during the sawing of the substrate. When the sawing is completed, the vacuum is removed and either atmospheric pressure or pressurized air is applied to the channels of the chuck, and the combination of the substrate, first sawing tape and second tape are easily removable because of the low surface tension effect of the first major surface of the second tape with the major surface of the chuck.

Abstract: A method and apparatus for fan folding a continuous web of paper having transverse fan fold lines in fan folds having a preselected fan fold length when the continuous paper is moved along a feed line from an upstream area to a folding area. A controller energizes a drive motor to oscillate a discharge chute through a predetermined arc and at a predetermined rate to permit the continuous web of paper to be fan folded as the paper is moved through the discharge chute at the folding area.

Abstract: A cylindrical internally contoured sleeve-shaped attachment for a screwdriver designed to prevent the screwdriver from slipping out of a slotted head screw and thereby inflicting injury to the fingers or work piece. A cushioned end prevents any marring of the work piece. This attachment is preferably molded of clear plastic material and has no direct mechanical connection to the screwdriver.

Abstract: A soft synthetic resin, such as polyurethane, body is molded onto a metallic steering wheel frame except for a part thereof intended for installation of the steering wheel onto a column shaft and a soft burr formed on the resultant covered steering wheel along the parting line of the mold is removed by refrigerating the steering wheel to make the burr hard and fragile and then removing the burr by shot blast treatment, whereafter the steering wheel is heat dried to eliminate water from the atmosphere condensing on the exposed metallic installation part of the steering wheel and prevent resulting corrosion of that part.

Abstract: A lens generator device is provided with a dynamic electronic braking circuit for instantaneously interrupting operation of the lens generated under certain conditions to prevent injury to an operator. The lens generator includes a chamber structure having an access cover and having a power driven grinding tool therein. A photoelectric switch is mounted on the tailstock in confronting relation with the chamber structure cover and is operable when the cover is raised or when the tailstock is retracted to operate the dynamic braking circuit and instantaneously stop operation of the grinding tool.

Abstract: A cam shaft tool for a slide type lathe. The invention generally comprises an improved adjustable tool wherein a plurality of holders each carrying a cutting insert is fixed to a main block via an adjustment block. The holder is radially adjustable relative to said adjustment block and axially relative to said main block. The invention also relates to a cutting insert holder for use in a cam shaft tool.

Abstract: In apparatus for forming cut lengths of tube by winding one or more strips of material into a continuously advancing spiral wound tube and periodically cutting off lengths of the tube, lengths of tube containing splices present in the strips are rejected at a rejection point downstream from the cut-off point by monitoring the strips for splices prior to winding, waiting until enough strip has passed the splice monitoring point to extend from the splice monitoring point to the rejection point, and rejecting the length of tube at the rejection point when that amount of strip has passed the splice monitoring point.

Abstract: A hobbing tool made of cermet composed of 70 to 97 percent by weight of hard phase and a binder phase. The hard phase is made of a composite carbonitride of transition metals including titanium and tungsten, and at least one other element. The binder phase contains nickel and/or cobalt and inevitable impurities. The ratio between nitride atoms and carbon atoms and the ratio between titanium atoms and the atoms of transition metals other than titanium in the hard phase should be within specific ranges. The cermet having the above composition has an increased toughness and an excellent resistance to heat and wear and is difficult to weld.

Abstract: In a remaining bar material machining method, a plurality of works are taken from a continuous bar material on an NC lathe, and the remaining portion left at the end of the bar material is machined effectively. In the lathe in which both first and second headstocks are axially movable along the bed, the continuous bar material can be continuously machined with efficiency. At that time, to utilize the remaining portion left at the end of the bar material effectively without discarding it, this remaining bar material is transferred to the second headstock. An NC controller includes a main machining program and a remaining bar material machining program; when the remaining bar material has been transferred to the second headstock, the remaining bar material machining program is executed instead of the main machining program having hitherto been executed. During machining the remaining bar material on the second headstock, the first headstock is waiting in readiness for the machining of the next bar material.

Abstract: The sharpening unit comprises two diamond grinding wheels 6,7 mounted on respective shafts 8, 9 rotatably supported by a carriage 14 movable away from and towards the cutting blade 4 of a leather splitting machine to bring the grinding wheels in contact with the blade bevel. Said shafts are housed in eccentric bushes 30, 31 rotatably engaged in said carriage and operable in angular rotation, which bushes can be fixed according to predetermined positions to give a desired mutual positioning to said diamond grinding wheels.

Abstract: A cutting tool employing negative cutting inserts providing both high volume stock removal and a fine surface finish. The insert utilizes negative radial and positive axial rake angles and incorporates a lead angle of between about 30.degree. degrees to about 90.degree. degrees.

Abstract: An electrician's utility hammerhead for use in striking objects like nails, prying objects from adjacent surfaces, and puncturing objects like knock-out plugs of electrical junction and fuse boxes, comprises a forward section with a flat striking surface primarily suited for striking nail heads, a middle section for attachment to a handle and having left and right side surfaces configured for use in striking objects, and a rear section that tapers rearwardly to a rear surface of reduced area for striking objects in confined areas, and for knocking out electrical junction box knock-out plugs of various sizes, and including a fulcrum protuberance on the top surface of the rear section for providing increased leverage when using the hammerhead as a prying tool.