Abstract: Apparatus for restoring a turret table toolholder guide station. The apparatus comprises a plurality guide rings each comprising precisely molded or machined inner and external circumferential surfaces, one guide ring being installed into each of the channels. Each guide ring has a portion of the ring circumference removed for facile, snap-in installation, but each guide ring retains a sufficient portion thereof that a toolholder inserted for guidance in the station is in substantially continuous, precise toolholder guiding contact with the inner circumference of the guide ring.

Abstract: An adjustable aerial cam unit for use in a power press comprising a stationary driver assembly coupled to the press bed, a slide block to which the working tool is mounted, and means for coupling the slide block to the ram of the power press for movement therewith. The slide block is slidably mounted at an angle relative to the plane of movement of the ram to move between extended and retracted positions. The slide block includes a lower inclined bearing surface and the driver assembly an upper inclined bearing surface, so that when the pressure pad and the ram are lowered, the slide block will abut the driver assembly, and the inclined bearing surfaces slide against each other. As the ram motion continues, the slide block moves from the extended to the retracted position with respect to the ram.

Abstract: A cutting machine for cutting elongated, extruded plastic articles includes a cutter assembly composed of a pair of side-by-side, plate-like cutting die bushings having a transverse article opening formed therethrough configured and dimensioned to accommodate the passage and guidance of an elongated extruded plastic article therethrough, and a thin, generally planar cutting blade having a cutting edge. The blade is supportable for reciprocable movement between the cutting die bushings for movement between an operative position in which the blade moves across the article opening so as to cut an article disposed therein and an inoperative position in which the blade is displaced from the article opening. The blade is supported for reciprocable movement by at least one support finger disposed on each side of the blade which serves to prevent buckling of the blade.

Abstract: A shear mechanism has opposed shear assemblies mounted for reciprocation on a pair of parallel guide rails. Each shear assembly has a removable portion which supports the shears with top accessible fasteners so that these portions can be removed when the shear assemblies are fully advanced. A stop mechanism locks the shear assemblies at their fully advanced positions.

Abstract: A noise reducing die assembly comprising, a passive cam having an inclined passive face of a fixed inclination angle .alpha., and an actuating cam having an inclined actuating face of the same inclination angle .alpha. as that of the inclined passive face of the passive cam, and contacting the inclined actuating face of the actuating cam to the inclined passive face of the passive cam to drive the passive cam for pressing a work; a roller is disposed rotatably at the side of the passive cam, and a speed control cam plate having, at a location of the actuating cam facing the roller, a cam face having, at a position where an upper die contacts to the roller at the beginning of descending, a low-speed inclination angle .beta. which is larger than the inclination angle .alpha. of the inclined faces of the passive cam and the actuating cam and close to a right angle, and a succeeding medium-speed inclination angle .gamma. which is slightly larger than the inclination angle .alpha.

Abstract: A shear mechanism has a shear assembly with shear assembly that can be quickly changed. The shear assembly supports a vertically displacable shear which is operated via a drive system which is connected to the shear mechanism frame. With the release of top fasteners which secure the shear assembly to the guide rail support and the release of a top accessible support bearing the shear assembly can be lifted out of the frame since the shear drive system and shear assembly are vertically separable.

Abstract: A shear mechanism for shearing discrete gobs from at least one runner of molten glass has a shear assembly which is displacable back and forth along a pair of guide rails. The assembly has at least one shear supported on an arm which has a bearing at one side which is operatively associated with one of the guide rails. The support bearing has a lower bearing surface which engages the bottom of the guide rail and an upper bearing surface which supports the top surface and the lower bearing surface can be displaced away from the guide rail by operating a release which is located on the top of the bearing.

Abstract: A cropping mechanism for a surface mount machine is disclosed which cuts the feed tape supplying electronic components. The displacement of an actuator in one direction between end positions cycles the cropping blade from a start location to the cutting location and back to the start location. The actuator has a cam which rides in selectively configured slots defined in opposed, pivotally supported levers which support a pin received by the cutting element and controlling its displacement.

Abstract: In a die including a cam member, which can be compactly designed in addition to the necessary function given to a cam member, in order to accomplish high quality machining without moving the cam member in a serpentine fashion, the die includes a slide cam having a slide cam base on the top of which a polyhedral guide portion is formed, the slide cam which holds and supports the polyhedral guide portion of the slide cam base being slidable along the polyhedral guide portion, and onto which machining tools such as a punch and a trimming edge are mounted, an elastic body interposed between the slide cam base and the slide cam for urging the slide cam, and a driving cam contacting the slide cam for driving the same.

Abstract: An adjustable rolling cam slider which has a cam sliding block displacing vertically to link with a horizontal sliding block by two ball joints, and a link with a fixing block to get in touch with and drive the cam sliding block to displace downward, consequently cause the horizontal sliding block to slide horizontally upon lowering of the main shaft of the punching press. Steel balls are used between the sliding block and sliding rail of a sliding device for rolling of the horizontal sliding block, and two buffer reset devices are designed each with a spring which can have its degree of compression adjusted to adjust the acting angle between the cam sliding block and the horizontal sliding block for adjustment of acting force and stroke to form a cam slider which can convert vertical action of punching machine to horizontal action.

Abstract: Two shearing blades disposed along two lines which intersect each other are carried on the bottom edges of two adjacent walls of a four-sided ram structure. The ram is supported at four points whereby to provide greater stability. The workpiece is carried on the aligned top surfaces of a fixed bed and a movable carriage. The movable carriage is movable in a first direction. Finger grippers, joined by a connecting bar, are movable in slots along the top surface of the movable carriage in a second direction. Thus, the workpiece is moved in the first direction by movement of the movable carriage and in the second direction by movement of the finger grippers. The workpiece may be precisely and accurately positioned under the shearing blades making use of sensors in each of the finger grippers and a lateral sensors in each of the finger grippers and a lateral sensor at the end of the movable carriage.

Abstract: A compact paper cutter and perforated edge paper trimmer apparatus which comprises: a base, a base cover hingedly connected to the base to move between an open and closed position, the base cover having a slidable knife edge for cutting paper against a hard strip material on the surface of the base when in a closed position over the base, a paper edge guide hingedly connected to the base to move between an edge guide position generally perpendicular to the base and a closed position adjacent the base, and perforated edge holding teeth and a lever to move the teeth between an upright perforated edge holding position above the base surface and a non-holding position below the base surface.

Abstract: A machine for cutting cardboards or the like has a base board, a clamp bar extending across it and spaced mounting arms for the clamp bar. A cutter head is slidingly mounted on the clamp bar. A projecting wedge member on the cutter head is slidingly received in a complementary wedge shaped slot in the clamp bar. The clamp bar is connected to the spaced arms by resilient connecting means permitting limited angular movement of the bar relative to the arms, while taking up lost motion in the connection.

Abstract: A sheet slicing mechanism includes a rigid frame member supporting a stepper motor coupled to a drive gear. A rotatably supportable rotary member includes a driven gear coupled to the drive gear and is rotatably supported upon the frame. A blade frame having a generally cylindrical configuration is received within the rotary member and is freely movable in the vertical axis. The blade frame supports a cutting blade and a cutting force weight. The rotary member defines a vertical slot which cooperates with an outwardly extending pin in the blade frame to permit the blade frame to be vertically movable with respect to the rotary member while locked thereto as to rotational motion. A solenoid activated lifting means is supported upon the frame and is operable to raise the blade frame to a noncutting position.

Abstract: A paper roll splitter attachment of the guillotine type is provided for mounting on the vertically movable assembly of a fork-lift type vehicle. It includes a frame and means for attaching its back to the above-mentioned vertically movable assembly. A pair of horizontal mutually spaced lifting arms extend outwardly from the bottom of the front side of the frame for receiving a roll to be split. A pair of spaced parallel rails extend downwardly in a diagonal plane from the top of the assembly, connecting the upper portion thereof to the extermities of the arms. A cutting blade is slidably mounted on the rails for reciprocating motion. Hydraulic rams reciprocate the blade in its diagonal path. Upwardly facing hooks on the ends of the arms receive and hold the opposite ends of a shaft through the roll core, whereby the roll can be lifted and transported to a desired location for splitting by the blade being driven guillotine-wise into it by the rams.

Abstract: A punch and die pair for turret punch presses including a punch guide with a punch holder slidable therein having a small replaceable punch insert locked axially and rotationally in the punch holder.

Abstract: The subject piercing die is particularly adapted for piercing a hole in a blank having an open interior and an outer wall defining a closed figure. The piercing is done from the interior of the blank through the wall to the outside of the blank. The piercing die includes a base with a slide movably mounted on the base. A guide is movably connected to the slide to control movement of the slide to a straight line movement. A female die having a blank receptacle for holding the blank is mounted on the base. The female die has a cutting aperture extending through a portion of the female die and intersecting the blank receptacle. A male die is mounted on the slide and is positioned within the blank receptacle for mating with the cutting aperture to cut a hole in a blank positioned in the receptacle. The male die cuts a hole in the blank from the interior of the blank through the outer wall to the outside of the blank.

Abstract: A wire rope cutter comprising a frame, a hydraulic cylinder and piston mounted on the frame. A piston rod extends from the hydraulic cylinder and mounts a wire cutting knife. An anvil is provided on the frame and in the axis of the piston rod. Means for mounting the frame on a support body are provided and the body includes a hydraulic circuit. The cylinder is in fluid communication with the hydraulic circuit on the body to thereby operate the piston and knife to advance towards the anvil for cutting a wire rope placed on the anvil.

Abstract: A toolholder guide for punch blocks and turrets and the like comprising a toolholder bore carrying about its circumference longitudinal protruding wear strips preventing contact between the toolholder body and the wall of the bore. The wear strips are preferably of plastic and are secured into dovetailed longitudinal keyways broached into the wall of the bore. The innermost surfaces are broached to the a close clearing radius with the body of the toolholder so that the toolholder is accurately centered and guided for reciprocal motion within the bore. Preferably, the broaching operations are carried out using a broaching fixture which secures an actuating hydraulic cylinder directly to the punch block or turret using adjacent toolholder bores for attachment purposes.

Abstract: The apparatus of the present invention addresses the unique problem of punching centrally located holes in stoma-wafers, and comprises a base portion fixed to a surface such as a table or the like, the base portion having a raised annular projection for placement of a stoma-wafer thereupon with the projection fittingly engaging into the hole of the stoma-wafer. The base portion further includes an upper arm member fixed to the base portion and extending to a point directly above the location of the raised projection. The fixed member has a vertically movable plunger element with an annular blade threadably attached to the lower end of it, the annular blade being of a size larger than the raised projection, so that movement of the blade downward would cut a hole in the wafer to the appropriate size of the blade as the stoma-wafer is centrally located on the projection.

Abstract: A self-equalizing device for performing mechanical operations such as piercing and punching wherein the piston means forming the work ram is internally mounted within the proximal portion of a yoke body, the yoke body being in turn mounted for sliding or rolling displacement on a stationary base. A knock out slot for a pin type punch is provided in the external portion of the piston ram. Single and multiple action devices are disclosed.

Abstract: A shearing device which uses an in-line design wherein bearings are aligned with the moving blade so that lever arm forces are not produced between the movable blade and a fixed blade. This provides for highly accurate and clean cuts of printed circuit boards. The fixed lower blade is vertically oriented to provide clearance on both front and back portions for placement of tooling means to hold printed circuit boards in the shear to minimize scrap cut from the boards. Additionally, the clearance provided by the vertically oriented lower blade allows for zero space cutting of the printed circuit boards adjacent components mounted on the printed circuit boards. An optical curtain is also used which is directly aligned with the movable upper blade so that obstructions can be detected directly in the path of movement of the upper blade.

Abstract: The cutter mechanism for slitting laminate material interconnecting overlapping borders of adjacent articles includes an elongated body that has a pair of upwardly-extending guide feet on opposite ends along one edge of the body and downwardly-extending guide feet on opposite ends adjacent the other edge with a generally rectangular slot between the respective feet and extending from opposite ends. The slots have bases which extend perpendicular to the opposite edges and thus perpendicular to the path of movement of the cutter means to provide sharp cutting edges between the respective feet.

Abstract: A punching unit in a punching binding machine for joining together packs of sheets by a resilient teeth comb binder, comprises on a framework of the machine: a fixed bar provided with openings having a substantially vertical axis; a plurality of punches, each of which extended through the openings and each comprising a bottom cutting edge and a tang extended at the top of the bar; a movable bar arranged at the top of the fixed bar and carrying a series of catches, each of which movable between an active position for operating the relative punch, and a rest position where such a punch is not thereby operated; the movable bar being supported on slides sliding on the framework; a control assembly for the lowering of the movable bar on the fixed bar.

Abstract: A band saw for an industrial band mill is hollow formed, preferably on both sides thereof, and substantially from edge to edge thereof. This hollow forming eliminates the need for prestressing the band saw by roll tensioning during its manufacture. When the wheels are strained up, the band saw becomes substantially flat on the wheels. Additionally, the band saw may be made thinner to reduce material costs and to result in a thinner saw cut, thereby reducing sawdust waste. Less friction between the band saw and the timber being cut reduces heat build-up, thereby improving the useful life and reliability of the band saw, and facilitating faster cutting rates for improved production efficiency. Preferably, the cutting teeth are swaged set. The band saw may be single edged or double edged and may be mounted in a band mill having either flat or crowned wheels.

Abstract: A mat board cutter including a cutter-carrying body having an end-to-end channel receiving a guide rail on which the body is slideably mounted. A plurality of slippery polymeric wear buttons project from a bottom surface of the body and bear against an upper surface of a clamp bar under the rail, and the amount of projection of at least one of the wear buttons is adjustable to provide close fitting accurate sliding relationship between the body and the guide rail.

Abstract: A stamping or nibbling machine for cutting pieces off a metal workpiece comprises a hollow punch adapted to be driven against the workpiece to win small pieces thereof. A die having an opening therethrough is adapted to be located in alignment with the punch and on the other side of the workpiece. A centering pin has one end projecting into the interior of the punch and an opposite end extending out of the punch and adapted to engage into the opening beyond the position of the workpiece and a displacing mechanism for the pin is carried within the hollow punch and is advantageously in the form of a coil spring located between a collar at the inner end of the punch and the inner wall of the hollow workpiece which moves the outer end of the centering pin into association with a centering pin mounted within the die below the opening thereof.

Abstract: A miniature pneumatic punch for a strip of photographic print paper, to punch a hole between adjacent photographs at the exposure stage of the printing process. The punch comprises a cylinder body having a chamber and a piston seated within to be pneumatically driven between upper and lower limits in the chamber. For this purpose, actuation and retraction air inlet ports are provided through the wall of the chamber. Fluid communication within the cylinder chamber between the ports is prevented by the piston. An elongated guide of constant cross-section is secured centrally to the piston on the side thereof exposed to the air from the retraction air inlet port. A passageway is provided through the cylinder body below the chamber, the passageway being of constant crosssectional and flushly receiving the guide for sliding movement therein. An elongated punch of the same or less crosssection dimension than the guide is centrally secured to the free end of the guide.

Abstract: An improved cutting machine including a thin, elongated cutting blade and a guide block with an opening which is shaped to conform to the cross-sectional shape of the elongated cutting blade. The guide block with the defined opening both guides the elongated cutting blade and maintains it clean.

Abstract: An apparatus for supporting and actuating a punch in a press includes a cam unit body, a cam slide slidably supported on the cam unit body for movement along a first line and having first cam surfaces on opposite sides thereof which are angled with respect to the first line, and a U-shaped driver supported on the cam unit body for movement along a second line, the driver having a second cam surface on each leg thereof which is angled with respect to the second line. The slide is disposed between the legs of the driver and each second cam surface engages a respective first cam surface so that movement of said driver into said cam unit body along said second line moves the slide in one direction along the first line. A slotlike opening oriented parallel to the first line extends transversely through the slide and communicates with an internal cylindrical cavity within the slide, which cavity also extends parallel to the first line.

Abstract: A needle and syringe destructor is disclosed having particular suitability for the destruction of hypodermic syringe needles, of the single-use variety, immediately after use. The needle, and a portion of the syringe barrel, may be simultaneously severed in a single motion by means of the operator actuating a lever arm means. The lever arm means is linked to a pair of guillotine shears effectuating severance with increased mechanical advantage to the operator. Severed portions drop to a storage chamber. Remaining syringe barrel portions may then be discarded into the storage chamber through a movable closure lid providing separate access to the storage chamber. The severed needle and syringe are destroyed to prevent re-use and accidental injury to medical personnel.

Abstract: A die and accommodating counter assembly for scoring and cutting sheet material in which cooperating bushing and pin registration and transfer locking units are utilized to maintain the alignment of the die and the counterplate when being placed within a press.

Abstract: Apparatus for the high speed automatic cutting of measured lengths of a multiplicity of materials in which the material is guidingly fed from a supply source centrally of a feed path by a pair of adjustable feed rollers driven by a stepping motor that measures the length of material to be cut in terms of the cumulative steps of the stepping motor, and in which a reciprocable cutter knife is actuated in each cutting operation by a controlled single revolution of a connected drive shaft. A presser member supported for movement with the cutter knife engages the material in advance of the cutting blade and holds the material during cutting. The feed rollers are adjustable to a preset operative position and are spring urged to this position, but are arranged for independent manual movement to a wider separation of the rollers than in the preset position. The urging spring is also adjustable to vary its effective urging force.

Abstract: The shearing machine comprises a stationary apron and a moving apron carried by lateral upright members and provided with cutting blades, the moving apron being guided at both ends by means of roller devices adapted to cooperate with guide ramps mounted on bottom lateral extensions of the moving apron. The guiding devices are placed substantially at the level of the horizontal cutting plane while another guiding device is located in the bottom portion of the shearing machine. The extensions are adapted to receive and transmit the cutting power developed by jacks mounted on the stationary apron.

Abstract: A supporting assembly providing lateral support for the nib of a punch in a power press having a stripper plate to prevent breaking of the punch when punching thick workpieces. The bushing which conducts the nib of the punch through the stripper plate has a coaxial annular recess in its underside. An annular insert of resilient polymeric material, preferably polyurethane plastic, completely fills the recess and presents an inwardly-directed collar surface substantially aligned with the opening in the bushing. The insert is dimensioned to project downwardly a short distance beyond the punch bushing to provide an exposed striking surface for engaging the workpiece as the ram descends. The reaction force of the springs on the stripper plate is sufficient to volumetrically deform the insert causing the inwardly directed collar surface to crowd against the nib of the punch, thereby providing enhanced lateral support for the punch as the punch penetrates the workpiece.

Abstract: Centering and wear compensating means for turret bores and the like. Plugs of a suitable resilient, long wearing, self-lubricating material are equiangularly placed in bores of uniform length provided in the wall of a turret bore in which a tool holder is positioned. The plugs are made long enough to be compressed into the bores by the tool holder when the tool holder is centered in the turret bore and are spaced along the turret bore such that engagement of the plugs with the tool holder will be maintained as the tool holder is raised and lowered in the turret bore. The plugs are curved on one end to conform to the tool holder surface and are chamfered to permit easy compressibility as the tool holder is positioned in the turret bore.

Abstract: An improved photographic printer of the type wherein photosensitive photographic material is automatically advanced through an exposure area and is marked intermediate adjacent exposures to facilitate the separation or cutting of the different exposures. The improvement consists of a marking system having elements movable in and out of the exposure area to mark the photographic material while it is in the exposure area but without obstructing the photographic material while it is being exposed. In a preferred embodiment, the marking system includes a punch carried by a rotatable eccentric member, the punch being carried in and out of the exposure area on rotation of the eccentric member. The eccentric member is biased to maintain the punch out of the exposure area and is provided with a camming surface engagable by a reciprocal member, cooperation between the reciprocal member and camming surface causing rotation of the eccentric member.

Abstract: A guillotine assembly (20) having opposed cutting blades (65,85), the orientation of which can be adjustably preselected to provide both vertical and horizontal relative inclination in order to provide initial and progressive interference between the blades (65,85) as they effect a progressive cut therebetween. At least one blade (65) is mounted to allow a progressive movement with respect to the mechanism on which it is supported in order to accommodate the preselected degree of progressive interference between the blades.

Abstract: Apparatus for making holes in a web of photosensitive material which is transported in a copying machine has an electromagnet with a reciprocable armature connected to one leg of a U-shaped carrier. The other leg of the carrier supports a material removing tool which penetrates through the web when the electromagnet is energized. The carrier is held against wobbling by a ball bearing which is connected to its one leg and extends with minimal clearance between two parallel guide faces which are machined into a stationary holder for the electromagnet. The holder has a plate-like extension with a hole which receives the tip of the tool subsequent to penetration of such tip through the web. The tool is normally located at one side of the plane of the web, and the extension is located at the other side of such plane.

Abstract: A device for cutting strip material across its length has a single plate frame in which a tool slide is reciprocable by a toggle linkage driven by moving cylinders the piston rods of which are fixed to the frame. Fluid delivered by way of passages in the piston rods powers the movement of the cylinders for smooth vibration free action. The foregoing abstract is not to be taken as limiting the invention of this application, and in order to understand the full nature and extent of the technical disclosure of this application, reference must be made to the accompanying drawing and the following detailed description.

Abstract: Punching press having a top cutter which is vertically movable by an axially guided ram. The top cutter extends beyond the cross-sectional surface area of the ram and cooperates with a bottom cutter mounted on the machine table. The ram is constructed as an angle section, particularly as an equal-limbed L-section, at least on the place of mounting for the top cutter and at least over an axial length corresponding to the length of stroke of the top cutter. The axial guiding system for the ram comprising a pin-and-bush guide which is disposed on the cutting clearance and comprising at least two pins and associated guide bushes situated at a distance from each other on the ram and on the machine frame in an axially parallel configuration.

Abstract: A knife assembly capable of cutting photographic strip material with high accuracy at extremely high speeds includes a base, a stationary blade, a source of rotary power, a crank shaft, a spring-wrap clutch mechanism, first and second linear drive shafts, first and second adjustable linear bearings, and a movable blade. The spring-wrap clutch is mounted on the crank shaft for selectively imparting rotary power to the crank shaft, and the first and second linear drive shafts are connected to the drive shaft. The movable blade is connected between the ends of the first and second linear drive shafts.

Abstract: A cross-cutting shear of the type where the nip formed between the blades travels in the direction of movement of the material being sheared is driven by a single crankshaft. The upper blade is attached to the crank portion of the crankshaft, and the sliding motion of the blade-carrying carriage is provided by cam discs mounted on the crankshaft and acting against rollers in a stationary frame. The crankshaft is journalled at each end in links pivotally attached to the bottom part of the blade carriage. The guide links are free to pivot independently of the blade carriage. By this construction, reaction loadings are prevented from being transmitted through to the stationary housing, when a shearing action is taking place.

Abstract: A cutting machine having a table on which multi-ply layups of sheet material are positioned during cutting operations utilizes a reciprocating cutting blade that is suspended in cantilevered fashion above the table and lowered into cutting engagement with the material during cutting. The sheet material and blade are moved relative to one another while the blade is oriented to remain tangent to predefined cutting paths followed through the material. A blade guide is mounted in a presser foot which slides over the material, and several guide rollers in the blade guide engage the sides and trailing edge of the blade to control blade positioning immediately above the sheet material.

Abstract: Adjustable cutting angle shearing machine for laminates comprising a pair of shoulder members of substantially C-like shape. The upper ends of the shoulder members are hinged to a supporting frame along a vertical axis. There are provided guides in the shoulder members extending parallel to the shoulder member hinge axis for the sliding movement of respective movable cutter supporting plates whereon the cutters are arranged so as to define an angle the apex whereof is aligned with the hinge axis. Actuating means are provided for lowering and raising the movable cutter supporting plates and an angular position adjusting means for the shoulder members.

Abstract: Novel nesting apparatus for aligning separable die set halves of the type having demountable die insert means and utilized in punch press machines which novel apparatus is operable upon cyclic engagement of the die set halves to effect nestable reception of projecting means on one die set half within mating means on the other die set half. The novel nesting apparatus assures accurate alignment of the respective punch and die means during the positioning, clamping, and punching of variously shaped workpieces introduced therein. No auxiliary alignment means is required.

Abstract: A shear comprising a frame, a fixed blade, a movable blade cooperating with the fixed blade to cut sheet material disposed therebetween, a hydraulic power cylinder for moving the movable blade upwardly and downwardly past the fixed blade, a lever for drivingly connecting the power cylinder to the movable blade, the lever being pivotally mounted upon the frame to provide oppositely extending lever portions, one pivotally connected to the movable blade and the other pivotally connected to the ram of the power cylinder, a roller journal mounted upon brackets to extend across the frame with the brackets selectively adjustably movable to position the roller, and springs for yieldably urging the movable blade against the roller. The power cylinder is controlled by a linkage and lever mechanism which moves the control member of a valve in response to the movement of a foot pedal as well as the movement of the lever which drivingly connects the power cylinder to the movable blade.

Abstract: A corner shearing machine has two pairs of shears, the lower blade of one pair intersecting the lower blade of another at a right angle, and the upper blade of one pair intersecting the upper blade of the other pair at a right angle, the lower blades being mounted to a base and the upper blades to a reciprocable ram. Adjusting wedge assemblies, with screw drives and manually operable cranks facilitate adjustment of blade clearance, and hydraulically energized pressure pads maintain zero clearance between ram guide slides and guideway blocks therefor. Ram drive is by one or another of two hydraulic cylinders operating through a rocker shaft and linkage connected to the ram, and hydraulic clamps secure the work.

Abstract: A shearproof or notching or nibbling punch has an upper retainer member adapted to be secured to a press and a punch body. The upper body portion is adapted to be secured to the retainer member by bolt means and the lower body portion is square in cross section and has a substantially semi-cylindrical groove extending vertically along the center of each vertical face of the lower body portion. A heel for each groove has its lower portion flatted along its outer side to conform to the lower body configuration, and each heel has a cylindrical portion extending through a conforming aperture in the upper body portion and terminating in a head. Each head lies in an elongated slot in the upper body top surface, the slot being deeper than the height of the head. Springs lying in holes in the retainer member and extending into each slot bias the heels downward to project beyond the flat bottom surface of the lower body.

Abstract: A self-equalizing device for performing mechanical operations such as piercing and punching wherein the piston means forming the work ram is internally mounted within the proximal portion of a yoke body, the yoke body being in turn mounted for sliding or rolling displacement on a stationary base. A knock out slot for a pin type punch is provided in the external portion of the piston ram. Single and multiple action devices are disclosed.