Abstract: A portable power grinder comprises a housing (11), a rotation motor (10) with a rotor (13) having a rear end portion (27) extending out of the motor (10), an output shaft (22) which is drivingly coupled via a reduction gearing (23) to the rotor shaft (13) and intended to carry a grinding tool, and a speed governor (18) for providing a constant motor speed. The reduction gearing (23) comprises a gear (24) integral with the rotor shaft (13) and another gear (25) integral with the output shaft (22). Alternative rotor shafts (13) with gears (24) of different sizes may replace each other for obtaining different gear ratios and different output speed levels, and the length of the rear end portion (27) of the rotor shafts (13) varies with the size of the integral gear (24). The housing (11) has a detachable lid (15) carrying the speed marking (2) of the tool and having an internal projection (28) of a size directly related to the speed level readable on the speed marking (21).

Abstract: Liquid abrasive slurry for chemical-mechanical polishing of semiconductor wafers is held on a rotating polish table by a containment device having two continuous circular bonded strips of differing flexibilities. A releasable clamp seals the entire length of the more flexible strip to the table periphery.

Abstract: A method and apparatus for buffing the balls of ball joint studs. The apparatus includes a frame structure including a base; an index table; a plurality of fixtures spaced circumferentially about the index table and each arranged to rotatably mount the shank portion of a stud, with the ball portion exposed, so that the stud may rotate about its lengthwise axis; an index drive mounted on the base and operative to indexingly move the table so that each fixture is moved successively through a loading station, a buffing station, and an unloading station; and first and second buffing wheels mounted on the frame structure at the buffing station with their respective peripheries arranged to buffingly engage opposed portions of the spherical surface of the ball of the stud as the ball is moved between the wheels by the index drive.

Abstract: A canopy for overhanging a door or window and the method of assembling the canopy to the wall. The assembly including a pair of channel assemblies mounted in a spaced relation between the structural girts of the wall over the door or window, a frame assembly having an angle member on each side for connecting the assembly to the channel assemblies, a roof-trim assembly mounted on the frame assembly and a soffit sheet mounted on the bottom of the roof-trim assembly to enclose the roof-trim assembly.

Abstract: Components for a multiple window unit sunroof are pre-assembled at the factory and include a support frame having vertical beam members which have water weep channels on their top faces for routing away from the sunroof moisture entering under the glazing panel adjacent side edges which overlap the drain channel. The support frame is snugly received in a boot. Removable locator jigs are attached to the perimeter frame of the glazing panels to position them and hold them while mounting flanges are being installed.

Abstract: A frangible enclosure with low resistance to impact has a curvature such that a distributed load primarily is resisted by axial stresses generated therein, in little or no bending stresses are generated. Weakened portions are made in the enclosure which reduce the flexural strength of the enclosure. The enclosure is made of a plurality of panels, which panels are constructed of a composite laminate of fiber reinforced material. The panels are interconnected to form a housing, or enclosure. Weakened portions in the panel can be made by perforating or cutting the material of which the laminate is made. A floor system can also be provided for an enclosure. Such a floor system, which is also frangible, is made of a support frame upon which the floor panels rest and loosely engage. The floor support frame can be supported by the base of the enclosure, or other supporting objects in the enclosure.

Abstract: A blind window frame provided as a kit for assembly on site, for installation in a wall opening, including a multiplicity of substantially planar frame members. Each frame member has end portions wherein an end portion of one of the frame members abuts an end portion of another of the frame members, and the frame members are fastened to one another. The frame members are cut from a blind window frame bar having a generally flattened U-shaped profile and at least one leg configured to provide a dovetail-shaped railing. A generally L-shaped fastener is used to fasten the abutting blind window frame members at substantially right angles to one another, to form an assembled frame. The kit also includes an interlocking connector for interlocking blind window frame members of assembled frames which are mounted adjacent and offset from one another. The kit also includes anchoring apparatus for anchoring a blind window frame to a wall.

Abstract: A dual glazing window having a removable glazing panel is provided with a breather system connecting the air chamber between the glazing panels with the outside ambient air by routing an outwardly facing channel into the window rail or stile member either on its end edge or side face. The abutting rail or stile member will close the open side of the channel in the end edge while the adjacent glazing panel closes the channel in the side face. A breather sleeve is press fitted into the channel to protect the wood from absorbing moisture.

Abstract: Converted log structural products are produced from conventionally unusable or marginally useful sections of logs transversely cut into suitable lengths and then cut longitudinally by perpendicular cuts into log parts of either right-angled sector or right triangle cross-section. Four log parts matching in size and shape, and positioned so that their right angles form the corners of a rectangle, are assembled into a converted log, the interior space between the four log parts being filled selectively with braces, supports, insulation, concrete for various applications.

Abstract: The invention is for an athletic flooring system wherein the flooring substructures are proportioned and positioned so as to give to the flooring system preferred properties in point and area elasticity. The subfloor is made up of a first and a second wood subfloor wherein the first subfloor is less continuous and more elastic than the second subfloor. The subfloors act in cooperation with a pad and with void volumes distributed in the subfloor to give the flooring system elastic properties that will render the flooring system DIN certifiable under the DIN 18032, part 2, tests.

Abstract: The improved structures of floorboard include a groove located in the underside of the floorboard, and a fixing block having a flange dimensioned to fit into the groove of the floorboard. The fixing block has a bottom portion intended to anchor in the cement foundation. The fixing block can be made to join with an elastic floor frame fastened to the cement floor. The floorboard can be conveniently and economically fastened to the cement foundation in various forms by means of the fixing block which is detachably fastened to the floorboard.

Abstract: An insulation fastener and method for supporting insulation on a block wall is provided. The fastener has one end that is anchored to a block in the wall and another end that pierces the insulation. The anchoring end is positioned to lie inside a hollow inner core of the block.

Abstract: A patching kit is provided for repairing holes of various kinds in the hollow walls of building components, such as doors and wallboard walls where the backside of the front walls are not readily accessible. The kit includes a backing plate of a stiff material of a size that can be inserted through the hole and sufficiently large to be positioned flat against the back surface of the front wall and cover substantially the entire area of the hole, forming a front recessed pocket to receive a suitable filler material. The peripheral area of the backing plate is coated with a suitable adhesive. The backing plate is firmly secured in position until the adhesive sets by a simple wedge means.

Abstract: A wall assembly used in the construction of passenger boarding bridges or other box type structures. The wall assembly includes an exterior panel with V-shaped folds or corrugations and a vertical flange on the end of each panel for attachment to adjacent panels.

Abstract: A process and a machine for overpacking luggage of users of different transport means and in particular, for airplane passengers.The machine includes a device for forming a packing around each luggage (5), moving the luggage upon a conveyor belt (8) and during its movement, providing the packing in the form of a protecting envelope (16) made of a plastic material, while providing the envelope (16) with an opening extending in front of the handle (6).

Abstract: The invention concerns a process and a device for avoiding interruptions of operation caused by the strapping, on machines for the strapping of packing elements. The process is characterized by a second strapping coil with further strapping, and in that the leader of one of the two strappings is constantly kept at a standby position in the machine from which, upon removal of the other strapping from the strapping guideway, it is automatically fed to the strapping guideway. The device is characterized in that the feed system is preceded by a switch with two strapping guideways for a leader section for each one of the two strappings, with a strapping feed for the alternative introduction of one of the two strapping leaders into the feed system.

Abstract: An apparatus for processing one or more wine bottles to extract and replace corks safely. Specifically, a compartment segregates a first volume from a second volume and contains wine processing tools. Introduction of an inert gas to the first volume displaces oxygen from the first volume. An oxygen meter monitors levels of oxygen to allowing an operator to reduce the oxygen level below a predetermined level before start of processing. An operator uses the wine processing tools placed within the compartment directly by placing their hands and arms through apertures into elastomer gloves. The wine processing tools include a cork extractor, wine filling funnel and a cork inserting apparatus. The processing is all carried out within the inert atmosphere allowing an efficient, economical and safe cork extraction and insertion without promotion of oxidization of the wine.

Abstract: An apparatus and method for the automated and large scale preparation of layered stacks of one or more food items such as sandwich meats, hors d'oeuvre servings and the like ("set-ups"). The apparatus conveys a continuous web of paper through a plurality of slicer stations, each slicer station providing one or more slices of one or more food items to sequentially form set-ups of two or more stacked layers of horizontally spaced food slices. The apparatus is synchronized so that each sliced layer is conveyed to a subsequent slicer station before the next layer of food slices is deposited directly on top of that previous layer. The set-up is formed with two or more stacked layers of food slices before being conveyed to a cutter/wrapping station where the paper web is cut to separate the finished set-ups which are then wrapped by folding a portion of the cut paper over the finished set-up.

Abstract: Mechanism and means for enclosing a package in a wrap. The external dimensions of the package are first determined and sufficient wrap is fed with which to enclose the package. Depending on the external dimensions of the package, the amount of wrap fed is adjusted and thereafter the package is enclosed in the wrap.

Abstract: A wrapping sheet is disposed on a roll so that marginal portions of the wrapping sheet extend beyond the respective side faces of the roll. A wrapping sheet winding apparatus for winding the wrapping sheet around the roll has a pair of chucks which are drivingly engaged with a core of the roll and rotate the roll to wind therearound the wrapping sheet. Each of the chucks is provided with suction holes formed on the outer peripheral surface thereof.

Abstract: Equestrian saddle pads, especially adapted for energy or impact absorption, so as to save the horse. The saddle pad is characterized by a pair of side flaps hinged along a common axially extending top edge alignable with the vertabra of a horse such that each side flap extends over the top sides of the horse. An inner pocket is conformed in each side flap so as to contain an impact absorbing foam core. The foam core includes a center of open cell foam, enclosed by inner and outer layers of closed cell foam. The open cell center provides an impact absorbing air system. The inner and outer layers of closed cell foam contribute to energy absorption and, also, enable the pad to mold to each horse's individual conformation, thereby eliminating pressure points that cause soreness.

Abstract: In a crop stripping apparatus for harvesting grain from standing crop, the height of an overhead hood (18) is adjusted in response to the position of the top of the crop. A sensor housing or nose (34) protrudes forwardly from the hood (18) and has a sloping undersurface (35) which contacts the crop. A pair of cooperating sensors (37) and (38) sense the position of the top of the crop by contact of one or both or neither of the sensors with the top of the crop. The crop slides along the undersurface (35) of the nose (34) with minimum disturbance to the grain heads by the effect of the sensing operation. The nose (34) is mounted in such a manner that the undersurface (35) is maintained at a constant inclination to the ground during vertical movement of the nose (34).

Abstract: A rotary mulching lawn mower is provided having an annular housing forming a toroidal internal cutting chamber in which is oriented a blade having a central axis for rotation. The blade has a series of blade portions extending radially outward from the central axis each having an end portion extending into the toroidal internal cutting chamber. The blade end portion directs cut grass upward into the cutting chamber. Each blade has an intermediate portion located between the central axis and the end portion having a substantially flat surface lying in a plane generally perpendicular to the axis of rotation. The intermediate portion is provided with a radially extending rib located intermediate the leading and trailing edge portions of the blade having a slope projecting downwardly out of the plane for directing cut grass into the lawn upon rotation of the blade. The lawn mower of the preferred embodiment is driven by a battery powered electric motor.

Abstract: An apparatus for steaming of spun cops based on a trough-shaped steamer (2) arranged directly adjacent to a spinning machine (1) parallel to the cops (15) of a spinning station (14) standing in a row. This enables a conventional handling device (17) to move the cops (15) from the spinning stations (14) into the steamer (2) and, after the steaming process, to move the cops (15") from the steamer (2) to the conveyor (16) of the spinning machine (1). The steaming process is thus integrated with the material flow of the spinning plant. The dwell times of the cops after steaming are largely predeterminable. Also, the space requirements of the equipment are minimal and there is no need for additional manual moving of the cops.

Abstract: A link for connecting a chain. The link has a first outer chain plate, a first pin, a second pin, and a second outer chain plate. The first outer chain plate has two circular holes. The pin has, at a first end, an enlarged flat head and, at a second end, a dome head near which a groove extends so as to form a neck. The second outer chain plate has a circular hole and a hole consisting of a relatively small semicircular hole overlapping partially with a relatively large semicircular hole. In a plant, the first pin is (a) inserted through a hole of the first outer chain plate, holes of two inner chain plates, and the circular hole of the second outer chain plate and (b) riveted at both heads to thereby combine these elements conventionally. The second pin is inserted through the other hole of the first outer chain plate and the enlarged flat head thereof is secured to the first outer chain plate.

Abstract: An aircraft is maintained at a constant glide slope and air speed by trimming delta torque commands provided by an autopilot. Delta torque commands that change by more than twenty percent are trimmed automatically to maintain the constant glide angle and to assist the pilot in maintaining air speed within .+-.5 knots on the approach glide slope.

Abstract: An evaporatively cooled internal combustion engine includes a compressor, a combustion chamber and a turbine for transmitting work performed by the rapid expansion of combusted working fluid. The turbine includes an arrangement of stators and rotors. Each of the rotors defines an internal cavity which includes a vaporization section which corresponds roughly to the rotor blade and a condensing section which corresponds roughly to the rotor disc. A radial array of circumferentially disposed capture shelves is provided in the vaporization section for capturing cooling fluid contained within the internal cavity and flowing radially outwardly in a centrifugal field generated during rotation of the rotor. The capture shelves restrict the flow of the cooling fluid to distribute the fluid over the inner surface of the rotor in the vaporization section.

Abstract: An exhaust header system for an internal combustion engine having improved exhaust gas flow characteristics. Primary pipes extend from openings in a flange bolted to the engines exhaust ports. The primary pipes come together at a collector pipe into which the primary pipes extend slightly. The ends of the primary pipes are substantially parallel, uniformly spaced around the collector pipe axis and have end surfaces lying substantially in a single plane. A generally pyramidal transition piece has a base corresponding to, and secured to, the primary pile end surfaces so as to cover the area between the pipe ends. The pyramid apex extends along the collector pipe centerline toward the exit end. The length and cross section of the transition piece is selected to provide a smooth transition from the greater combined internal cross section of the primary pipe ends to the lesser cross section of the collector pipe exit end.

Abstract: A control system is provided for use with a hydraulic system which includes a source of pressurized fluid, a plurality of flow regulator means, and a plurality of fluidly powered components. Each flow regulator means is adapted to receive the pressurized fluid and is responsive to a respective control signal for regulating the flow of pressurized fluid to respective fluidly powered components. The control system includes a plurality of control members, each being movable to a plurality of locations for indicating a desired fluid output for a respective flow regulator means. A plurality of sensors are provided for sensing the position of respective control members and responsively producing respective position signals. A primary controller is adapted to receive the position signals, process the received signals to responsively produce the control signals, and deliver the control signals to the flow regulator means.

Abstract: A device for controlling the variable capacity motor incorporated in a hydraulic drive vehicle, wherein a control valve for reducing the oil pressure for controlling the motor is provided to pilot hydraulic piping extending from a control pump or controlling the capacity of the motor, and changeover valves are provided for performing changeover between operation and non-operation of the pressure reduction valve. The above structure serves to control the minimum capacity of the variable capacity hydraulic motor while reducing the pressure of pilot oil introduced from the control pump and, when a pressure in the main circuit exceeds a preset value, the changeover valves operate even when the pressure reduction valve is in operation so as to cancel such operation for continuously controlling the vehicle.

Abstract: An energy converter includes a resonator adapted for generating a sound wave in a medium, and a movable member disposed in a progressive direction of the sound wave generated by the resonator, and adapted for being driven by an acoustic radiation pressure resulting from the progression of the sound wave. Since the vibrational energy of the resonator is conveyed to the movable member as the acoustic radiation pressure by way of the medium, the present energy converter exhibits an excellent energy conversion efficiency. Namely, the loss is reduced during the conversion of the vibration of the resonator into the driving force for the movable member, and accordingly the present energy converter exhibits a high conversion efficiency. The present energy converter may further include a stator adapted for holding the stator thereto and disposing the liquid therein. If such is the case, the energy converter can be applied to liquid media.

Abstract: Several embodiments of turbocharged internal combustion engines wherein the turbocharger is designed to provide high boost at low and mid range and the boost is reduced at high range to maintain either a limitation of the maximum boost or to maintain the boost pressure in a linear relation to engine speed. The means for reducing the boost pressure comprises a throttle valve in the induction passage that is operated in a variety of manners responsive to engine speed.

Abstract: A combination aquarium heater and cooler apparatus is provided which utilizes a feedback circuit to automatically maintain the fluid in an ecosystem at an operator set desired temperature. The feedback system scheme takes advantage of a thermo-electric heat pump component in combination with a high gain amplifier in order to achieve the desired result of maintaining the ecosystem at a temperature which is nearly constant regardless of other undesirable spurious heat inputs or losses to the ecosystem.

Abstract: In a cooling apparatus for cooling an object by means of expanding a pressurized gas which is precooled below its inversion temperature, the pressurized, precooled gas is passed through a depressurization outlet and thereby expanded in a manner such that a gas jet exits from the depressurization outlet and is directed towards a surface of the object to be cooled. This surface has a central impingement area which is impinged upon by the gas jet and which is surrounded by a plurality of spiral-shaped outwardly extending ribs. The heat transfer is thereby improved. The gas, which is in the saturated condition, forms a vortex and, as a result, droplets are separated from the gas. This enables utilizing the heat of vaporization of such droplets.

Abstract: Process for freezing a product in which said product is contacted with a film made of a liquefied gas of which the boiling point is below -30.degree. C., disposed at the surface of a vibrating support, and the frozen product is at least in part separated from said film of liquefied gas.Device for freezing a product including a vibration generator (7) connected to a support (2) at the surface of which there is disposed a film of liquefied gas (3) of which the boiling point is below -30.degree. C.

Abstract: An ice transport and dispensing system includes an ice maker for introducing ice into a remote ice storage bin and a plurality of ice dispensing stations that receive ice from the bin. Each dispensing station has an ice storage hopper, and at least one downwardly sloping ice delivery conduit extends between the bin and the hoppers for a flow of ice through the conduit from the bin to the dispensing stations solely under the influence of gravity. So that a single conduit can deliver ice to at least two dispensing stations, the conduit extends past one of the stations and leads to the other station and an ice diverter assembly is actuable to divert a flow of ice from the conduit to the one station. A control circuit monitors the level of ice in the hoppers of the dispensing stations and operates the system in a manner to maintain a supply of ice in each hopper.

Abstract: An environmental control system comprises room temperature measurement apparatus, a plurality of thermal sensors fixed on a mattress over abed, a plurality of humidity sensors fixed on the mattress over the bed, an air conditioning unit for varying the room temperature, and a control circuit. The control circuit determines a thermal sensation of a sleeper from measured values by a plurality of thermal sensors , determines a perspiratory sensation of the sleeper from the measured values by a plurality of humidity sensors, and controls the air conditioning unit so as to let the temperature of the air in the vicinity of the bed be different from the room temperature by an amount prescribed by the combination of the room temperature value and the thermal and perspiratory sensation values, thus maintaining a comfortable condition in the bedroom and on the mattress.

Abstract: A temporary air conditioning condensing fan is mounted in a rigid housing which may be easily and rapidly mounted at the air exhaust side of an air conditioning unit to provide a temporary flow of cooling air to the condenser, in the event the existing condensing fan fails. A portion of the housing forms a shroud around the temporary condensing fan and directs the flow of air over the condenser. A head pressure adjusting valve adapts the temporary condensing fan to differently sized air conditioning units and maintains an efficient head pressure on the condenser of the existing air conditioning unit.

Abstract: The object of the present invention is to make it easy to separate a portion which takes charge of the operation control of an air conditioner from the air conditioner using a remote controller, and the essential points are that the control means of the air conditioner controls the operation of a compressor to make the room temperature detected by a first temperature sensing means approach to a set temperature set by a first temperature setting means, and further comprises a changeover switch, and a means for controlling the operation of the compressor based on a signal from the remote controller when the changeover switch is in a valid state; the remote controller disposed being detached from the air conditioner comprises a second temperature sensing means for detecting the room temperature and a second temperature setting means for setting a desired temperature and transmits a signal for controlling the operation of the compressor to make the temperature detected by the second temperature sensing means appr

Abstract: An automotive air conditioner which conditions air making use of radiation of heat of a condenser and absorption of heat of an evaporator effectively. The evaporator 207 and the condenser 203 are disposed in a duct 100. A bypass passageway 150 is provided sidewardly of the condenser 203 in the duct 100, and a flow rate of air bypassing the condenser 203 is controlled by pivotal motion of an air mixing damper 154. Another bypass passage is provided sidewardly of the evaporator 207 in the duct 100, and a flow rate of air bypassing the evaporator 207 is controlled by pivotal motion of a bypass damper 159. Air is conditioned to an optimum blown out air temperature by varying the cooling rate at the evaporator 207 and the heating rate at the condenser 203 and is blown out to a room of an automobile from spit holes 141, 142 and 143.

Abstract: This invention aims to facilitate setting and modifications of characteristic data for microcomputers used for control of various types of air conditioner. A control device for the air conditioner comprises a microcomputer having a first ROM for storing a program for controlling operations of a compressor and a blower, a RAM for storing present data and various data associated with the operations and a CPU for executing the program. A second ROM is provided in the control device for storing specific data representing capacity of the components such as compressors and a blower, functions of the air conditioner, exclusive cooling or cooling/heating and so on.

Abstract: A beverage container utilizing a cooling device for keeping a beverage cold over a protracted period of time, with such container having sidewalls and a bottom defining a volume in which a beverage can be contained. The cooling device is operatively associated with a lower interior portion of the container and involves a closed receptacle of a refreezable, non toxic substance. When the cooling device has become relatively warm, it is readily removable from contact with the lower interior portion of the container, so that it may be replaced by a freshly-chilled cooling device of like configuration, thus to keep the beverage at a desirably low temperature. We provide several different types of magnetic and mechanical devices for preventing the cooling device from being displaced when the pitcher is tilted to pour out some or all of its contents.

Abstract: A safe-sex device comprising an ornamental brooch that includes an emblem suggesting a message to a viewer that the wearer of the brooch carries a prophylactic against venereal infection, the emblem being positioned either inside or outside the clothing worn by the wearer. The brooch includes a clasp for removably attaching the emblem to the clothing. A packet having flexible foil walls containing the prophylactic, namely, a condom, is positioned in a packet holder that is removably mounted to the brooch located either behind the clothing out of sight of the viewer or external to the clothing behind the emblem. The packet holder has biasable holding walls that have a recess and a button that are located within the augmented borders of the condom, which is configured as a closed plane curve, so that the packet holder is removably gripped between the biasable holding walls.

Abstract: A method of knitting a double needle bed fabric in which an inlay thread or yarn 12 is interlaced into the fabric by transferring stitches from the active needles (10) of one needle bed to the needles of the other bed. In this way the inlay 12 is interlaced or "woven" into the fabric without actually forming loops in the inlay 12. This enables materials that cannot be knitted to be incorporated into fabrics securely.

Abstract: A security apparatus for attaching a portable unit to be protected to a supporting surface. The security apparatus includes a normally deactivated passive locking unit, which is activated by an electronic key unit, which is portable and moved adjacent to the passive locking unit to power it. The key unit includes a device for coupling electromagnetically the key and the locking units to transmit electrical power therebetween. A magnet is concealed within the security device to activate the electronic key, only when it is placed in the proper position relative thereto. Additionally, a mechanical arrangement for a locking pin is employed to further provide a level of sophistication before the actual unlocking of the device occurs.

Abstract: A lock assembly is described for a door, the assembly including a gib having at least one flange. A locking unit has a first wall including an edge portion on the wall for sliding into the gib and for engaging the flange on the gib such that the locking unit is retained by the gib. A locking latch is movable between an unlocked position in the locking unit and a locked position such that the locking latch engages a wall in a frame when in the locked position. A second wall extends from the first wall of the locking unit in a direction substantially non-parallel to the first wall of the locking unit to keep the door closed when the locking latch is in the locked position.

Abstract: An anti-theft device for attachment to a steering wheel of an automotive vehicle having a movable tubular member fitting movably around an elongate rod member to adjust the distance in relation to the rod member so as to catch hold of a portion of a steering wheel with a double hook and a stop plate provided at one end of the rod member and a bent plate provided under the tubular member, and the tubular member being locked at an adjusted position by means of a lock including a steel ball engaging one of annular grooves provided on a portion of the rod member.

Abstract: A double ended key holder includes a first body portion, a second body portion, and joining and biasing mechanisms for engaging the first and second body portions together to form a key holder having openings on at least one end. The first body portion is configured to form one of the openings and has a gap which is hidden when the first and second body portions are biased together in an engaged position.

Abstract: A rolling mill has a power source (10) driving a common drive shaft (11) which in turn drives gearboxes (12 to 15). Each gearbox drives a respective shaft (16-19) which in turn drives a roll (20 to 23). A free wheel (24) is provided between the gearbox and forming surface of its associated roll.

Abstract: A method of making an elongated mandrel having an end integral with a drill section, with the method including the steps of subjecting a single columnar piece of material to the heading process so as to make a blank N composed of the mandrel, a short stem having one end integral with the end of the mandrel and having a diameter D greater than a diameter of the mandrel, and a flange formed integral with the other end of the stem. The short stem is then cold forged to produce the drill section having end edges (7a) and (7b) facing the flange, and, subsequently, the drill section is trimmed so as to remove the flange together with a scrap resulting from the cold forging of the stem, in such a manner that the mandrel having the integral drill section can be mass produced from the single piece of raw material, efficiently at a reduced cost.