Abstract: This invention relates generally to a method and apparatus for increasing productivity of metal cutting band saws. More specifically, it relates to a method of holding coolant to a band saw blade over a long cutting span so that coolant is delivered to virtually all locations along the cut, and apparatus therefor.

Abstract: A method of slitting a continuous thermoplastic film comprises advancing the film longitudinally at a first speed along a peripheral surface of a roll rotating at a peripheral speed equal to or slightly greater than that of the film, and slitting the film while being advanced by pressing cutting edges of a rotating cutter against the peripheral surface of the roll. In order to prevent the cutting edges from being worn out and to form slits of uniform size and shape, the peripheral surface comprises an elastic layer of polymeric material, the cutting edges are heated above a temperature at which the film starts melting, the film and the elastic surface layer are cooled along their contacting surfaces with a cooling liquid, and the cutting edges are rotated at substantially the same peripheral speed as the roll. The invention also includes an apparatus for carrying out the method.

Abstract: An apparatus for cutting thermoplastic foam material, such as polyethylene foam or rigid polystyrene foam, includes an electrically heated cutting element made from a steel band and having a sharpened front longitudinal edge and a rear longitudinal edge spaced from one another by a width dimension of the band which is many times greater than the thickness thereof. The opposite end portions of the cutting element are parallel and close to one another and are each releasably gripped by a separate set of jaws which engage the front and rear edges of each end portion to mechanically support and supply electric current to the respective end portions. Each set of jaws includes a stationary jaw and a movable jaw. The movable jaws are connected for operation by a single operating member for movement in unison relative to the stationary jaws to facilitate rapid insertion and removal of the cutting element from the jaws.

Abstract: The cutting instrument of this invention is made by threading a heater assembly through a hollow cutting instrument body. A blade having a shank and a blade body including a cutting edge is secured within the hollow cutting instrument body at its shank portion such that the blade body extends from the hollow cutting instrument body. The heating assembly is secured to the blade body and to the cutting instrument body. The blade body is coated with a non-stick means.

Abstract: Semi-automatic device which makes it possible to produce cylindrical cavities, according to a given geometrical arrangement, in a layer of gelled material, the said device consisting of a set of several individual devices each of which, as shown in FIG. 1, consists of a cutter inside which a suction tube slides, it being possible for a pressure reduction to be created in the said suction tube.

Abstract: A blade guide for saw blades consists of a number of small cemented carbide plates which are moulded at intervals onto a base plate of steel or the like by means of a metal, such as brass or bronze, which is considerably softer than the carbide in the plates.

Abstract: A cutting tool has a plurality of cutting teeth. An electric voltage is applied between adjacent teeth so that a localized heating of the workpiece occurs at and around the cutting tips, in order to facilitate the cutting step. The voltage may be varied in such manner as to prevent or induce non-linear cutting.

Abstract: Apparatus for cutting holes and notches in thermoplastic film by using heated steel rule dies. The dies are set into a heated die block, and scrap passes through the die, and through a hole in the heated die block so pieces of scrap fuse together as they pass through the block. The die block is fixed, and a movable platen urges the film down against the heated dies. A stripper is biased up to strip the film from the dies after cutting, and is resiliently movable down to allow cutting. Air can be directed through the stripper to blow the film up, off the stripper, to prevent melting when the film motion stops. Use of two dies accurately spaced can cut wicket holes and provide accurate cutting to assure proper operation in a bagging machine.

Abstract: A plastic bottle is held from a dome molded above the bottle neck and the dome-held bottle is moved along a horizontal groove by a moveable belt. A heated knife is held against the turning bottle neck and cuts the dome and undesirable flashing from the bottle at the top of the neck.

Abstract: The upper end of an elongate electrical resistance cutting element, extending upwardly from a workpiece supporting table, is movably positionable along an arcuate position of a support member to adjustably vary the cutting angle. A fence for guiding the workpiece during straight line cutting is detachably securable to the table. Alternately, the workpiece may be engaged by a circle guide for establishing a center of rotation for the cutting of cylindrical shapes. An auxiliary cutting unit, especially adapted for free hand cutting and sculpturing, is connectable to the integral electrical energy supply means.

Abstract: A system for converting design information into three-dimensional shapes includes a design information storing and processing apparatus, a controller for converting digital into electrical signals, and a cutter for sculpturing a workpiece into a three-dimensional form. The system enables a designer to sketch a proposed design on the storing and processing apparatus and immediately view the design on a three-dimensional model.

Abstract: A plastic film dispenser comprising a support structure consisting of a housing (1), support means (26) for a roll of film, guide means in the form of a fixed flap (36) and a moveable flap (37) to guide film from the roll to an outlet (27). The housing is provided with a drop plate (34) moveable from a position where film being withdrawn is maintained clear of treated film severing means (41) to a position where film is contacted by the severing means. The housing preferably includes means (25) to support a roll of other material and a keeper rod (18) whereby a length of such material may be conveniently withdrawn from the roll and severed by severing means (12).

Abstract: A cutter employing two heated eccentrically mounted rollers adapted to coact with each other in order to sever a material by means of a crushing action is utilized in conjunction with a transport member to cut predetermined lengths of material from a continuous roll of said material. The cutting action of the heated rollers provides cut ends of the material which may be readily spliced together without the use of gum strips.

Abstract: A coolant system for use with a cutter of the type having a vertically disposed rotatable cutter wheel for cutting metallurgical samples and other objects. Such a cutter has a motor-driven rotatable abrasive or metal cutting wheel or blade, and a workpiece holder which holds a specimen workpiece from which a section is to be sliced off. Either the cutter wheel or the workpiece holder is movable to bring the workpiece into engagement with the cutter wheel. The coolant system is combined with a blade guard which covers a major portion of the rotatable cutting blade for safety reasons, and the coolant system distributes a coolant fluid in an advantageous manner onto the center of the vertically disposed rotating cutting blade on both sides thereof so as to bathe the workpiece over the entire cutting area. The coolant system is primarily intended for use with a cutter of the type where the workpiece is moved into engagement with the cutter wheel during a cutting operation.

Abstract: A lens surface is taped for protection during second side finishing and excess tape is trimmed from the lens with a heated cutting wire.

Abstract: A device for trimming an edge of a tubular article to form a portion of a pantyhose prior to the sewing of a gusset. A support is rotatable about its vertically disposed central axis and cooperates with a mask supported independently of the support and normally stationary. The mask has slots with which trimmers in the form of electrical heating elements cooperate, each of the trimmers being movable independently of the other relative to the mask. The support is rotated relative to the mask and one of the trimmers penetrates and cuts the cloth by heat action and enters one of the slots in the mask so that during continued rotation of the support an edge of the article is trimmed from the remainder by the aforesaid trimmers to remain engaged about the support as an annular band.

Abstract: In the manufacture of a packing container laminated packing material is used which with the help of a rotating cylindrical cutter is made thinner within a limited longitudinal region. This reduction of thickness has been difficult to realize up to now with the desirable accuracy, since the specified depth of cut that has been set may readily be influenced by vibrations in the moving material or in the cutter. These difficulties are overcome by a guiding device, arranged in the immediate vicinity of the edge of the cutter, which limits the thickness of the strip cut away. The guiding device is suspended in contact with the cutter in such a manner that not only are the vibrations reduced, but also the influence of the remaining vibrations on the depth of cut is minimized. The guide is adjustable to vary the depth of cut and includes air outlets for cooling the cutter and for guiding the cut strip away from the packing material.

Abstract: A shear for cutting bar stock includes upper and lower cutting blade supports each having a cutting blade, and a hold-down member, all pivotally connected about a working bearing. This assembly is pivotally mounted about a second bearing or pivot axis on one end of a frame of the shear, and is height-adjustable by a lockable hydraulic actuator attached to the upper cutting blade support at the opposite end of the shear, to provide vertical adjustability of the cutting point with minimal horizontal or angular displacement thereof. Preferably, the two pivot axes and the cutting point are coplanar. The upper cutting blade support is pivoted relative to the lower one by a hydraulic actuator engaging the upper support at one upper part thereof which is not so coplanar, to provide both a relatively long lever arm and a relatively long cutting arm for minimizing arcuation of the cutting movement. One cutting blade is adjustable within its support for optimum positioning taking into account the shape of the stock.

Abstract: A machining tool comprises an annular structure having the same number of teeth as there are grooves to be machined, arranged radially in the structure, each tooth carrying a pin engaged in a curved slot. It also comprises a locking device constituted by a ring occupying a recess in the structure and a system of pawls carrying fingers which penetrate into the curved slots of the structure. It also incorporates a collar for controlling the locking device.

Abstract: A method and apparatus for precision cutting a bundle of mill length lumber into a plurality of strapped and trimmed bundles of lumber of desired shorter length(s). The bundle of mill length lumber is placed on an elongated conveyor and moved longitudinally by means of an advancing moveable carriage until the leading edge of the bundle of lumber abuts a surface of a set work carriage positioned downstream of a circular saw which can selectively be advanced across the conveyor path. The ends of the bundle of lumber are then squared by advancing a ram on the moveable carriage. The squared bundle of lumber is banded or strapped by a banding apparatus disposed slightly upstream of the saw and thereafter the leading edge of the bundle of lumber is precision trimmed by advancing the saw across the conveyor path.

Abstract: The device for sharpening and/or forming the profile of a silk screen printing squeegee consists of clamping means for firmly holding squeegee strips 12 without deformation and of a tool movable along the clamped squeegee strip 12 relative to the latter, which is designed as a heated cutting tool 6, namely as a wire or knife.

Abstract: A saw blade having two or three blade members immovably coupled to each other, and having a plurality of coolant passages grooved on the interior of the blade members. The passages communicate with coolant inlet ports and terminate at openings located at the root peripheral side of the blade cutting edges. The saw blade releases coolant from itself which not only cools the blade members but also blows cut material from the blade cutting edges thereby facilitating a cutting operation being performed on a workpiece.The saw blade may be utilized with a coolant feeding apparatus, having distributors which are rotatably driven and connected with stationary feeding pipes, the pipes having axial channels communicating with the coolant inlet ports of the saw blade.

Abstract: An ultrasharp diamond edge or point, which may be a monocrystalline diamond cut and ground to provide an ultrasharp edge or point or a polycrystalline diamond molded from ultrafine diamond or graphite powder to form an ultrasharp edge or point is irradiated with an electron microbeam and preferably simultaneously is subjected to a controlled jet of highly purified gas in an enclosure at low temperature and low pressure to smooth out any minute irregularities and to obtain an atomic smoothness, glazing and annealing. By selectively masking the surface of the diamond edge or point or facet planes, the effect of the irradiation or jet can be confined to well defined areas.

Abstract: A frame supports a hollow housing which mounts thereon a hot wire die support plate from the outer side of which projects a hot wire die. The housing is pivoted to the frame for movement between an operative position in which the die projects upward for cutting a cavity in a block of material that is moved over the support plate between limit-defining stop pins, and a discharge position in which the die projects downward for the gravity release of scrap material resulting from the cutting operation. The scrap material falls onto a hot wire scrap cutting grid extending across a scrap discharge opening below the housing, whereby the scrap material is reduced to small particles as it gravitates through the hot wire grid.

Abstract: A bandsaw blade guiding apparatus has a support arm forming a cavity through which the blade moves. The cavity contains a resiliently supported anti-friction member which has a flat surface contacting the back edge of the blade during a cutting operation.

Abstract: The rotary heat cutter comprises a heating element adapted to be rotated into engagement with a taut section of plastic web to sever the web transversely while the web is traveling in a straight path. Means are provided for constraining the heating element to move at the same speed as the plastic web when the heating element engages the web.

Abstract: Ultrasharp polycrystalline diamond edges, points, and improved diamond composites of predetermined configuration usable as cutting instruments, as high intensity sources for the emission of electrons, ions, neutrons, x-rays, coherent and incoherent light and high frequency electromagnetic radiation, and as ultraprecision molded mechanical and optical parts, or as high field permanent magnets or electrets, are produced by preparing and classifying natural and synthetic ultrafine uniform graphite particles, preferably of the rhombohedral phase, which are directly converted into diamond particles having a particle size of 3 to 100 angstroms, placing the ultrafine powder, either before or after the synthesis, with or without suitable additives, in a diamond mold defining the ultrafine edge or form to be produced, and applying a pressure of the order of 80 to 90 kb, preferably dynamic or static ultrahigh pressures of 100 to about 1000 kb, while heating the powder to a temperature of the order of 2440.degree. K.

Abstract: A movable insulation puncher includes lancing elements which are used to define slots for receiving shear connectors in a multi-layer panel. The lancing elements are heated by gas burners and are moved along a panel on a carriage, and toward a panel by a crank assembly. Return to a neutral position of the lancing elements is spring assisted, and the carriage can be used to store tools, or to support a workman.

Abstract: A small container contains a frozen liquid or other coolant and is magnetically adhered to a metal microtome blade either by means of a permanent magnet disposed within the container or a magnetized metal wall portion on the container, for cooling the blade. The container may be sealed or refillable. There is also disclosed a container having inlet and outlet openings for permitting a continuous flow therethrough of coolant such as carbon dioxide from a dry ice source.

Abstract: An apparatus for forming a sprue and a communication hole in a vacuum-sealed mould. This method includes steps of: laying a shield film over a pattern and a sprue forming pattern or a communication hole forming pattern; assembling the pattern with a moulding flask; charging a charged material of particulate type into the moulding flask, and laying another shield film over the moulding flask, the charged material and the top portion of the sprue forming pattern or the communication hole forming pattern; welding the two films together along the periphery of the top surface of the sprue forming pattern or the communication hole forming pattern; cutting the two films, thus welded, along the periphery of the top surface of the sprue forming pattern or communication-hole forming pattern; and removing the sprue forming pattern or the communication hole forming pattern through the cut portion of the film.

Abstract: A method of applying a line-shaped opening in a coating on a plastics foil, in which a part 3 having a pointed end is moved according to a line 4 in contact with the coating 2, while the temperature of the part 3 lies in the melting range of the foil 1 and the pressure exerted on the part 3 together with the rate of movement of the part 3 is such that the coating 2 with a portion of the subjacent foil 1, considered in thickness direction, is cut through according to the line 4.

Abstract: This invention relates to gang saws and other cutting apparatus having oscillating cutters for cutting workpieces into slices. The invention provides apparatus, having two elongate spaced apart cutter supports which are driven to oscillate 180.degree. out of phase with each other. Two sets of cutters are connected to the supports. For a suitable workpiece the cutters may be of a hot wire type. Each cutter of one set is connected to the first support by a resiliently extensible connector such as a spring and to the second support by a non-extensible connection. Each cutter of the other set is connected to the second support by a resiliently extensible connector and to the first support by a non extensible connection. Desirably the cutters of one set alternate with cutters of the other and all cutters are coplanar. Movement of cutters of each set in opposite directions tends to cancel the local influence of cutters on the workpiece.

Abstract: A machine for cutting grooves in foam workpieces includes a plurality of vertically spaced U-shaped cutting wires mounted on pairs of mounting posts. One leg of each U-shaped wire is mounted on one post, while the other leg is mounted on the other post. The posts are mounted on a frame so as to be adjustable in spacing and vertical position with respect to each other, so the widths of the grooves can thereby be adjusted. Horizontal slice-cutting wires are provided behind the groove-cutting wires so that grooves and slices can be cut simultaneously. The slice-cutting wires are aligned at an angle with the vertical so that each slice-cutting wire exits the workpiece before all those beneath it. One version produces tongue-and-groove sheet, while ship-lap sheets are produced by the other version.

Abstract: The application discloses an assembly comprising an elongated knife in association with a heating unit together with means to mount the assembly so as substantially to eliminate all warping or other distortion of the knife due to heat. Specifically, the knife is mounted directly against the sheath of an electric resistance type heating unit. The heating unit and knife are mounted from a supporting frame in such fashion that they may expand or "grow" axially, thus substantially to eliminate distortion of the heating unit and knife. Also associated with the supporting framework for the heating unit and knife is means slightly to tension the sheet to be cut on either side of the knife, while the cutting takes place, thus to prevent after-cutting contact of the sheet edges with the knife.

Abstract: An apparatus for forming individual serving portions of a frozen dairy confection from a block of the confection. A frame having a plurality of interconnected electrically conductive wires stretched across its sides serves as a die. The wires define a plurality of apertures. An electric power supply provides current to the wires and the electrical resistance of the wires heats the wires. Means are provided for moving a block of the frozen confection through the apertures so that the heated wires cut the block into the individual serving portions.

Abstract: A resaw apparatus and method for rapidly and accurately cutting elongate wood cants longitudinally. A thin-kerfed circular saw blade is utilized to cut the cants and a high-speed feed mechanism, having two sets of separately driven dual rollers which pinch the cant therebetween for both moving the cant and determining its direction of movement, urges the cant against the cutting edge of the saw blade. A pair of blade guides mounted on opposite sides of the blade hold the blade in position while water is fed through the blade guides to the side surfaces of the blade, thereby lubricating the blade-guide interface and removing heat generated by the blade guide and cutting of the wood to prevent warping of the blade from heat. The direction of movement of the cants is determined by the orientation of the two sets of rollers, which are mounted on respective movable carriages supported by slides incorporating directional alignment adjustments therein.

Abstract: In a high density solenoid operated multiple punch apparatus, having a punch head provided with the plurality of closely-spaced large bores arranged in column and rows that extend partially through the punch head from the top side, solenoid elements mounted in the large bores, a plurality of holes with a diameter smaller than the large bores aligned with the large bores and extending the remaining distance through the punch head to the bottom side, push rod elements slidably disposed in the holes actuated by the solenoid elements, the improvement beingA cooling system for the punch head which includes a plurality of small bores arranged in rows in the bottom of the punch head terminating short of the top surface and positioned in the area between the plurality of large bores, a plurality of elongated grooves in the bottom surface of the head located between rows of the plurality of holes and forming a recessed chamber connecting a row of the small bores, a plate seated in each of the elongated grooves with ea

Abstract: Apparatus for cutting a block of foamed material to the size of a laminate adhered thereto includes a support table and a carrier frame pivotally attached to the table. The carrier frame carries an electrical resistance wire and maintains same constantly under tension. The frame is vertically swingable to pass the wire through the foamed material along a clearly delineated line with respect to which the block is precisely located. This line is in registry with a transverse groove in the table which divides its supporting surface into sections on either side thereof and at right angles to an upstanding guide member extending along one side edge of the table.

Abstract: A press is disclosed having an upper tool which is vertically reciprocated by means of a ram and which is arranged to cooperate with a stationary lower tool in performing work on a workpiece positioned therebetween. The press is characterized by improved apparatus for detachably mounting the upper and lower tools, as well as by an improved apparatus for limiting upward movement of the workpiece during upward retraction of the upper tool.

Abstract: An apparatus for perforating the minor diameter or inner corrugation of a transversely corrugated thermoplastic drainage pipe. A plurality of perforations are simultaneously formed in the inner corrugations of the pipe by reciprocally moving heated punches radially into the pipe, removing the punches and then translating the pipe to another position for the next punching step. In an alternative embodiment, the punches are carried by a rotating ring which positions them opposite an inner corrugation and a cam device drives the punch radially into the pipe.

Abstract: A method and apparatus for terminating optical fibres. In the method, the fibre is threaded through a tubular ferrule so that the end of the fibre projects from an end face of the ferrule, and a heated cutting edge is swept across the end face of the ferrule at a predetermined rate. This produces a cut end for the fibre with a minimum of scratches, roughness, distortion, stress or discoloration without the need for subsequent grinding or polishing. The apparatus disclosed is particularly intended for performing the above method and comprises a jig adapted to receive the tubular ferrule and a fixed heated blade. The jig is arranged to be movable freely under the action of gravity with the end face of the ferrule maintained in sliding engagement with the blade whereby the cutting edge thereof is swept across the end face at the predetermined rate.

Abstract: A heated cutting device includes a cutting disc having a circular peripheral cutting edge and being rotatably mounted on a carrier. An arcuate electrical heating element is mounted on the carrier in close proximity to an arcuate portion of the cutting edge for heating same.

Abstract: A sub-water granulating device for granulating thermoplastic synthetic plastics materials is operatively combined with the nozzle plate of a screw extruder. The device comprises a rotary cutting tool head which is enclosed by a dome or hood. Flushing water is fed into the dome and discharged therefrom and the flow of water is directed to clean the cutting tools and to carry out granules cut by the tools thereby preventing the formation of lumps of granules and adhesion thereof to the nozzle plate.

Abstract: A method and a device for controlling thermal stresses in a power saw blade, especially a circular or band saw blade, during its use for any purpose, in order to assure the stability of the saw blade, by continuously measuring the temperature in two or more zones on the saw blade and determining the temperature difference between the zones; comparing the temperature difference(s) so calculated with one or more predetermined, desired temperature difference values; and using the result(s) of said comparison(s) to regulate the supply/removal of heat to/from one or more of said zones, in order thereby to maintain the/those desired temperature difference(s). The device comprising at least two temperature sensors a temperature comparator and one or more heat generators.

Abstract: A sheet piercing blade used to form perforate separation lines across continuous strip partible flattened tubular plastic film packaging bags is maintained a preselected optimum operating temperature by a heat transfer fluid medium circulating through a duct in substantially contiguous contact with the blade, a heat exchanger, and conduits connecting the duct and the heat exchanger.

Abstract: A continuous web converting machine is supplied with web material from a spider wheel unwind stand having a shiftable wheel axis. Movement of the spider wheel axis is regulated by a double acting fluid cylinder for controlled force application of the working web supply reel against a closed circuit pulling belt. Depletion of the working reel is detected by a limit switch actuated by contact with the shift carriage. upon working reel depletion, the pressure bias on the fluid cylinder is reversed and the shift carriage retracted to free the working reel from contact with the pulling belt. Thereafter, the spider wheel is rotatively indexed 120.degree. to align a full reel in the working position. Said full reel is prepared with a strip of double faced adhesive tape secured across the full reel web leading edge to facilitate web continuity and splice from a depleted reel to a full one.

Abstract: The creation of controlled hole sizes and locations in uncured reinforced thermo setting plastic material by mechanically perforating the uncured material and "B" staging the material surrounding the perforation by sonic vibration of the mechanical perforating device.

Abstract: A device for longitudinal cutting of a thermo-softening material into strips, such as strips of a separating material for battery electrodes comprising a roll holder, two pulling rollers having their rotation drive installed parallel and near to said roll holder, and said rollers moving the band in the course of cutting and delivering the cut strips onto the receiving shafts of a wind-up mechanism. A common shaft parallel to the pulling rollers is located under a cutting mechanism and carries electric cutters secured on arms; the hubs of said arms are fastened with the aid of intermediate sleeves on said common shaft. Both the hub and the intermediate sleeve are provided with segment teeth which interact with each other during the turning of the common shaft thereby lifting automatically the electric cutters.

Abstract: An arrangement for severing webs, particularly fabrics, of thermally severable materials includes a severing tool which is mounted on a support for displacement between an extended position and a retracted position thereof, being urged towards its extended position. The severing tool has a severing portion which is heated and which contacts and severs the web during the movement of the latter longitudinally of itself in a path past the support for the severing tool. A heat-conductive member is in heat-transmitting contact with the severing tool at the severing portion thereof in the extended position of the severing tool, the heat-transmitting relationship being interrupted when the resistance of the web to the severing action of the severing portion achieves such a value that the severing tool is displaced from its extended position toward its retracted position.

Abstract: A machine for cutting grooves in foam workpieces includes a plurality of vertically spaced U-shaped cutting wires mounted on pairs of mounting posts. One leg of each U-shaped wire is mounted on one post, while the other leg is mounted on the other post. The posts are mounted on a frame so as to be adjustable in spacing and vertical position with respect to each other, so the widths of the grooves can thereby be adjusted. Horizontal slice-cutting wires are provided behind the groove-cutting wires so that grooves and slices can be cut simultaneously. The slice-cutting wires are aligned at an angle with the vertical so that each slice-cutting wire exits the workpiece before all those beneath it. One version produces tongue-and-groove sheet, while ship-lap sheets are produced by the other version.