Abstract: A punching device includes a base, a linkage assembly, a carrying assembly, a punch and a pressure arm. The linkage assembly includes a pair of linkage members, a rotating member, a first connecting rod, a second connecting rod and a third connecting rod. The rotating member is rotatably mounted on the supporting member, the pair of linkage members is movably mounted on the rotating member, the first, the second and the third connecting rods connects in turn. The carrying assembly is rotatably connected to the third connecting rod and movably supported by the loading member. The punch is mounted on an end of the rotating member. The pressure arm is rotatably connected to the supporting member and the pair of linkage members to drives the carrying assembly to position a workpiece and the punch to punch the workpiece.

Abstract: A trimmer to cut a backing on which an overlay is mounted. The trimmer includes cutting blades and a removable fence that has a stop. The fence is carried by a pair of risers that are capable of moving relative to the work surface. A rotatable lever arm is coupled to the risers by a linking cam rod. When the lever arm and linking cam rod are rotated in a first direction, the risers move upwardly from the work surface and the stop of the fence is lifted upwardly and off the work surface to create a gap that enables the backing to move past the fence to the cutting blades to be trimmed. When the lever arm and linking cam rod rotate in an opposite direction, the risers move downwardly toward the work surface, and the stop is lowered against the backing to prevent the overlay from moving to the cutting blades.

Abstract: A punching device includes a base, a linkage assembly, a carrying assembly, a punch and a pressure arm. The linkage assembly includes a pair of linkage members, a rotating member, a first connecting rod, a second connecting rod and a third connecting rod. The rotating member is rotatably mounted on the supporting member, the pair of linkage members is movably mounted on the rotating member, the first, the second and the third connecting rods connects in turn. The carrying assembly is rotatably connected to the third connecting rod and movably supported by the loading member. The punch is mounted on an end of the rotating member. The pressure arm is rotatably connected to the supporting member and the pair of linkage members to drives the carrying assembly to position a workpiece and the punch to punch the workpiece.

Abstract: A power tool comprises a crank pin that is eccentrically rotatable by a motor about a rotational axis. A non-rotatable first slider is linearly reciprocated by the crank pin so as to linearly reciprocate a tool. An eccentric pin is disposed substantially diametrically opposite of the crank pin relative to the rotational axis and is eccentrically rotatable by the motor about the rotational axis. A non-rotatable second slider is linearly reciprocated by the eccentric pin in a substantially opposite phase from the first slider so that the second slider acts as a counterweight to the first slider in order to reduce vibrations at least in the direction of linear reciprocation. A rotatable component is rotatably driven by the motor about the rotational axis and has a center of gravity displaced from its rotational axis towards the eccentric pin so as to supplement the vibration reducing function of the counterweight.

Abstract: The present invention provides a technique for achieving weight reduction of the counter weight while reducing vibration in a reciprocating power tool. A tool bit performs a predetermined operation by reciprocating. A slider reciprocates to drive the tool bit. A motion converting mechanism converts a rotating output of the motor into a reciprocating movement of the slider. A counter weight reciprocates in a direction opposite to the reciprocating direction of the slider to reduce vibration caused by the reciprocating movement of the slider. A component part includes component of motion in a direction parallel to the reciprocating movement of the slider to cooperate with the counter weight in reducing vibration caused within the power tool. Thus, the weight of the counter weight can be decreased.

Abstract: A hole puncher has a base, multiple cutter brackets, multiple cutters, multiple springs, a linkage, an activating member and a handle. The base has two ends. The cutter brackets are mounted on the base. The cutters are mounted slidably through the cutter brackets. The linkage connects pivotally to one end of the base. The activating member connects pivotally to the linkage. The handle connects pivotally to the other end of the base and selectively pivots the linkage down. With the linkage and the activating member, the hole punch is effort-saving.

Abstract: A puncher having a double cutter linkage structure includes a driving shaft, a driving plate, a front linking rod, a rear linking rod, a front cutter seat, a rear cutter seat, a front cutter, a rear cutter, and a positioning seat. The driving plate is fixed to the driving shaft which has two ends connected to one end of the front linking rod and one end of the rear linking rod, respectively. The front linking rod is pivotally connected to the front cutter seat which is fixed to the front cutter. The rear linking rod has an curved arm at the other end to be connected to the rear cutter seat which is fixed to the rear cutter. The positioning seat is in a reverse U shape and has a front plate and a rear plate at respective sides.

Abstract: A photo cutting apparatus includes a support, a press, a linkage and a cutting device. The press is movably mounted on the support. The linkage is for pressing the press. The cutting device is arranged between the support and the press for separating photos developed on a sheet from one another in a single action.

Abstract: A device for cutting film-like material in a shearing action by a blade and a counterblade provided with respective cutting edges. The blade has first and second ends. Movement of the blade is controlled such that the first end and the second end move along paths that are different from, but substantially parallel, to one another. The blade moves between a separated position and a closed position. In the separated position, the cutting edges define a space through which the film-like material may advance, and the distance between the respective cutting edges is not constant along the entire blade, with the second end of the blade being closer to the counterblade than is the first end of the blade. In the closed position, the blade and the counterblade are closed on one another after cutting the film-like material with a gradual cooperative movement of the cutting edges.

Abstract: A scroll saw includes a machine base and a table mounted pivotally on the machine base for placement of a workpiece to be sawn. The table is rotatable about a horizontal axis that extends in a longitudinal direction of the machine base. A C-shaped blade-holding arm is fixed on the machine base, and has upper and lower arm portions that extend in the longitudinal direction of the machine base. A saw blade is held between front ends of the upper and lower arm portions of the blade-holding arm, and extends perpendicularly through the table. A saw-blade driving device includes a motor which is disposed within the machine base, and which is provided with a motor shaft. The motor shaft extends in the longitudinal direction of the machine base. A linkage interconnects the motor shaft and the saw blade so as to reciprocate the saw blade relative to the blade-holding arm.

Abstract: A plurality of hydrostatic bearing pads are each integrally formed in a respective pin or journal member being used within a mechanical press machine. The hydrostatic bearing pads are supplied with pressurized fluid sufficient to create a combined hydrostatic and hydrodynamic effect between the opposed bearing surfaces of the pin and an associated bushing. The hydrostatic bearing pads are used in conjunction with rotational and oscillating bearings in which relatively little rotation, oscillation, or slow rotational speeds exist or where it is desired to minimize the effects of hydrodynamic action which creates bearing “lift off” on journal bearings. These types of bearings are particularly associated with crankshaft and connection journal bearings, connection pins, and pivot pins used by a rocker-type coupling assembly that couples a weight assembly to the press machine piston or slide assembly or drive assembly.

Abstract: A cutting device for strip stock includes a stationary blade and a motor-driven, movable blade that continuously contacts against the stationary blade, constituting a point of support. Two other points of support for the movable blade are equally spaced from the cutting edge of the blade and from the sides of the blade. The other two supporting points also function as blade drive points for moving the blade in a reciprocating manner. The drive points are connected to an output shaft of the motor through a gear assembly. A pair of ball bearings on each side of the blade, which are laterally spaced from each other on each respective side of the blade, cooperate with the blade to achieve a very low friction for the device during operation.

Abstract: In accordance with one aspect of this invention an improved trim press is taught for use in separating molded articles from a web of material. The trim press includes a frame, a drive motor carried by the frame, a first platen carried by the frame, and a second platen carried by the frame and configured to be moved in reciprocation relative to the first platen. A first flywheel assembly is provided on the trim press having a weight with an eccentric mass, the weight being driven in rotation by the motor and coupled to drive the second platen via at least one kinematic linkage. The trim press also includes a second flywheel assembly having a weight with an eccentric mass, the weight being driven in rotation by the motor and coupled to drive the second platen via at least one kinematic linkage.

Abstract: A connecting rod unit is eccentrically supported on the drive shaft. The connecting rod unit is pivotally mounted via link members to double arm levers. Each double arm lever is pivotally mounted to a single arm lever. Furthermore, each single arm lever is coupled at its end remote from the double arm levers to a device for the adjusting of the height position of the ram. Each single arm lever supports a pressing column. These pressing columns are pivotally mounted to the ram. Accordingly, the structural members which transmit the driving force from the connecting rod unit to the pressing columns can be designed extremely stiff and with a minimal springiness. Also, all structural members located between the connecting rod unit and the ram, inclusive the ram, are designed in such a manner that no additional balancing forces for the vertical mass force balancing are needed.

Abstract: The eccentric shaft is connected via the connecting rod and slider to single arm levers projecting at both sides away from the slider. At their ends remote from the slider the levers are supported via threaded spindles at the frame of the punch press. Groups of link members are pivotally mounted to the levers. These groups of link members are connected to double lever pairs arranged symmetrically relative to the center line of the frame of the press. Every double lever is pivotally mounted to a pressing column. The pressing columns of a respective pair of double levers are mounted to a relative ram. Each ram is guided by three guide columns, of which two are rigidly connected to a ram and one to the frame of the press. By the symmetrical dividing of the driving structures and the two rams derived therefrom the punch press is given an extremely long space for mounting the tools without that the height of the punch press, the allowable rated output and the moving masses must be kept overly large.

Abstract: The push rods (16, 17) are connected via ball-and-socket joints (42-45) to the ram (3). The sockets (44, 45) are located within the push rods (16, 17) and the balls (42, 43) are located above the ram (3) and mounted to same. Thus, in case of off center loadings of the ram (3) no bending moments are transmitted to the push rods (16, 17). The entire bottom side of the ram (3) is available for the receipt of connecting members for the mounting of a tool to the ram.

Abstract: Four lever units are linked to the arrangement of connecting rods via a common bolt. Each lever unit drives one ram of the punch press. The rams are arranged in configuration of a square. This allows a much higher loading by off-center forces and the punch press can be designed for a given punch press output with considerably smaller dimensions.

Abstract: The balancing weight for the balancing of the rotating forces is connected via link members to respective balancing weights for the balancing of the oscillating forces. The balancing weights for the balancing of the oscillating forces are each pivotable mounted to the machine frame at one end via projections. At the respective opposite ends they include further projections, via which those ends are pivotably connected to each other via a pivot member. This forms the guiding of the movement of the balancing weights.

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: A vibrational dampening system in a cutter head having an elongate knife reciprocated to cut a ply or a stack of plies of sheet material comprises a drive pulley having an eccentrically mounted pin on which is journalled a linkage connecting the drive pulley to the knife, and two driven pulleys located on either side of the drive pulley synchronously interconnected with the drive pulley by a belt having spaced apart teeth formed on each side. The drive pulley and each of the two laterally disposed driven pulleys has a counterweight which rotates 180 degrees out of phase with the rotation of the eccentric pin in order to cancel the vertical forces generated by the reciprocating knife and its associated connecting linkage. The two laterally disposed driven pulleys rotate in an opposite direction relative to the rotational direction of the drive pulley in order to cancel any side-to-side forces generated when the counterweights move between vertically oriented positions.

Abstract: A tube cutoff apparatus includes a parallelogram link assembly and a rotary arc ram which orbits 360.degree. to maximize the vertical workstroke of the ram relative to the apparatus and has a lower inertia whereby to cut tubes of increased diameter, increase the ram length while decreasing the power required to drive the ram, and increase the driving response. The ram includes separated guide tracks with each track including a slide member that is disposed for sliding movement therein, the guide tracks defining wear plates and the slide members being connected to pairs of links. In one embodiment, two slide members are interconnected by a link plate, preferably by connecting to the individual pivot pins.

Abstract: The balancing weights are hingedly mounted at their lower ends to link rods. These link rods are hingedly mounted to an extended section of first rods. At opposite ends the balancing weights are hingedly mounted to reversing levers that in turn are hingedly mounted to second rods. The first rods and the second rods are supported on a common eccentric sleeve. Accordingly, the drive of the balancing weights does not come from structural members of the machine which are directly mounted to the ram. Accordingly, no mass forces and oscillations of the balancing weights and of the structures driving same can be transmitted onto the ram. Conclusively, the moving sequence of the ram and accordingly the cutting or embossing action is no longer influenced detrimentally such that the quality of a respective product produced is improved.

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 lead forming apparatus suitable for use in forming the leads of a semiconductor device is disclosed. The apparatus has a housing for supporting a stationary lower mold half, a support plate arranged to freely move with respect to the housing for supporting a movable mold half in opposition to the lower mold half, a moving device for moving the support plate to cause the movable mold half toward and away from the lower mold half, and an adjusting device for adjusting the position of the support plate with respect to the moving device. The moving device has a crankshaft, a driving device for rotating the crankshaft about its axis, and a coupler transmitting the rotation of the crankshaft to the support plate as a linear motion. The apparatus having the above-described arrangement can be operated with a reduced noise level and a reduced impact and, furthermore, achieves good operability.

Abstract: A trim press for severing articles differentially pressure formed in a thermoplastic sheet comprising a stationary die member and a movable trim die member mounted on a frame for movement toward and away from the stationary trim die member between a spaced apart position and a closed position in which the trim die members engage opposite sides of a sheet to sever the article from the sheet. Dynamically balanced drive mechanism is provided for moving the platen in a to-and-fro path of travel while concurrently oppositely moving a counterbalance weight movably mounted on the frame.

Abstract: A cutter in which a reciprocating knife is driven by an eccentric mechanism. The knife has a drive portion that flexes laterally in a plane perpendicular to the drive axis of the eccentric mechanism. The eccentric drive axis is offset along the perpendicular plane away from the axis on which the knife reciprocates. The offset of the eccentric drive axis allows the flexible drive portion to be kept straighter during the downstroke than in previous cutters. The increased straightening provides greater columnar strength and reduces deflection and stress of the drive portion during the time the knife is in compression. During the upstroke the knife is bent to a greater degree than in the previous cutters, but during this time the knife is in tension, the tension forces opposing rather than aiding the bending. The offset therefore provides for a longer service life for a blade of equal size or allows a reduction in size and mass of the knife to maintain an equivalent service life.

Abstract: Apparatus and method are disclosed for cutting paper pads to provide a paper pad which has a beveled edge. The apparatus includes a gripping assembly for gripping the pad and a positioning assembly for bending the pad intermediate its ends. A cutting assembly is provided for cutting the pad with a perpendicular cut while it is bent such that when the pad is returned to its original planar configuration, the cut edge will assume beveled configuration.

Abstract: In a punching machine, a yoke is supported on an eccentric section of the crankshaft. The yoke is designed to counterbalance the rotating forces. Both ends of the yoke are pivotably connected to connecting rods. Both connecting rods are pivotably connected, in turn, to a vertically-guided counterbalancing weight to counterbalance the oscillating forces.

Abstract: An eccentric press which can be constructed a single connecting rod machine or a twin connecting rod machine is described. The press includes a stroke adjustment means having a support lever which is articulately connected at the joint between the two portions of a lever arrangement. The articulation joint is guided on an adjustable path of movement and the foot point of the support lever is guided variably in its position on a circular arc, the center point of the circular arc coinciding with the position of the articulation point which corresponds to the bottom dead center of the ram. As a result, a change in the ram stroke does not change the bottom dead center of the ram, only one ram stroke being executed per connecting rod revolution.

Abstract: In order to drive a punching machine electrically, with the aid of a double-armed rocker (70) a translational motion for the compression beam (10) is generated on the one hand, and a rotary motion for an opposing drive on the other hand. On the one side, the double-armed rocker (70) is driven by a rotating clutch shaft (50) by way of a crank gear (60-66) and, on the other side, a chain link (73) serves to control the compression beam. The opposing drive is operated by means of a one-arm rocker (75) and, also, by means of a chain link (76). To ensure the execution of an exact cycle, an engaging and disengaging claw clutch (31, 36) is present. The cycle is maintained by a cam disk arrangement (51) on the one hand, and a coupling groove (37) on a coupling box (32) with a coupling bolt (38), on the other hand. The above provides the electric drive for a rectilinear punching machine for punching sheets of paper for mechanical binding systems.

Abstract: An arrangement, preferably for clamping knife blades in power shears includes a longitudinal T-slot or dove-tail slot in the blade holder or the blade itself. Gripping means (16, 46, 76) are provided in the slot for engaging retainers (19, 47). The retainers or gripping means are connected to biassing means whereby the blade is pressed against the holder. The biassing means comprise spring means (28) or hydraulic clamping cylinders (36, 38; 61, 62). For relieving the bias of the spring means (28) there are provided hydraulic cylinders (22, 23; 51, 52), which release the blade when they are in operation. Alternatively the bias of the hydraulic clamping cylinders is relieved by counteracting spring means (43; 66) to release engagement of the gripping means.Since the blade is retained by means of retainers engaging in a groove, it can be withdrawn sideways, which enables rapid exchange. The hydraulic operation for clamping and release of the blade, respectively, is very rapid.

Abstract: A punch press (10) having a punching head (30) which includes a large eccentric crankshaft (42) for operating selected punches (32). The large eccentric crankshaft (42) withdraws the punch (32) into an upper tool support (92) for a relatively large portion of the crankshaft rotation. The crankshaft (42) is connected to a selected punch (32) by a suitable mechanical interposer. The upper tool support (92) is provided to hold a variety of punches (32) and is movable to bring a selected punch (32) into position for being operated by the punching head (30). A mechanism is provided for relative positioning of a workpiece and the punching head (30). Since the punch (32) is withdrawn within the upper tool support (92) for a relatively large portion of the crankshaft (42) rotation the movement of the workpiece can take place while the selected punch is moving but withdrawn within the upper tool support (92).

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 shearing machine is disclosed which includes a first lower blade and a second lower blade positioned at right angles with respect to each other. A ram is provided which is swingably movable upwardly and downwardly with respect to the lower blades, the ram including a first upper blade and a second upper blade positioned at right angles with respect to each other. A drive drives the ram upward and downward with respect to the lower blades and connecting rods couple the drive to the ram. An adjusting mechanism is coupled to the ram and the connecting rods for adjusting the lower limit of the stroke of the ram. Furthermore, the machine includes adjustors for adjusting the horizontal clearance between the upper and lower blades when the ram is in its lowered position.

Abstract: A swinging ram type cutoff press for severing lengths of elongated stock such as tubing is provided of the type in which a ram is supported for swinging movement to operate a cutoff die set. The cutoff press includes a power cylinder combined with a toggle link arrangement to produce the swinging movement of the ram. The relative geometry of the ram link support and the toggle mechanism coupled with the arrangement of the cylinder is such that a complete ram motion cycle is carried out during a single forward or return stroke of the cylinder. The force exerted by the cylinder and toggle mechanism is not resisted either by return springs or the weight of the ram, thereby further maximizing the usable power of the power cylinder. Accordingly, one may reduce the cylinder size requirements for a given application. In addition, the mechanical advantage afforded by the toggle mechanism provides for a maximum force at the ram full down position to maximize the force available for the blade stroke.

Abstract: The machine comprises an operating arm accommodated with a pair of horizontally extending shoulders and is rockingly supported by a pin pivoted on parallel vertical supporting standards or uprights for said shoulders and forming part of the machine bedplate. The pin may be vertically moved along slots formed on said standards or uprights. The working plane is horizontal and may be rotated about a vertical axis and with said shoulders forms a cavity. Said plane has attached thereon the several counter-tools for the punching, nibbling and cutting operations and peripherally has cut profiles for rounding off. A mechanism is carried by the horizontal shoulders to cause the rocking movement for said operating arm and relative associated toolholders.

Abstract: A drive or drive arrangement for a movable work component, such as the ram of a punch press, stamping machine or the like, comprising a crosshead driven by a crank drive. At both sides of the crosshead there are hingedly connected one respective end of single-arm levers, the other ends of which are hingedly connected with threaded spindles supported in the machine housing for adjusting the stroke of the drive, and the intermediate bearing or support locations of the levers are hingedly connected via connecting or pressing rods with the ram.

Abstract: An apparatus for the mass compensation at a machine driven by means of a crank drive including a crankshaft, especially a punch press or stamping machine, comprising at least one compensation weight which is connected with a piston or cross-head and the crank drive in order to realize a mass compensation both of the oscillating masses and of the rotating masses. A double-lever is hingedly connected by means of its one end with the compensation weight in order to realize mass compensation of the rotating masses and is hingedly connected by means of its other end with the crank drive via a first guide or link. The one end of the double-lever is directly connected at the compensation weight, and an intermediate bearing means of the double-lever is hingedly connected via a second guide or link, directed towards the side of the crank shaft, with the machine housing or a component fixedly connected therewith.

Abstract: A cutter having a reciprocating knife for cutting sheet material has a drive mechanism for converting the rotary motion of a drive member into the reciprocating motion of the knife. The drive mechanism is comprised of a mechanical linkage which causes the forces applied to the upper end of the knife to be directed substantially along the axis of reciprocation and to, therefore, have very small lateral components minimizing wear between the knife guiding surfaces. The drive mechanism basically includes an eccentric drive pin which through a connecting link oscillates a pivotal crossarm. The oscillating movement of the crossarm is in turn imparted to the knife by means of an intermediate link connected between the crossarm and knife.

Abstract: A press adapted to operate dies such as tubing cutoff dies through a lightweight ram mounted on a parallelogram linkage for oscillating motion rather than for the usual reciprocating motion on a slide. The ram linkage is operated through a crankshaft and connecting rod by a motor, clutch, brake and flywheel. The machine is compact and uses radial bearings rather than slide bearings to guide the ram. The crankshaft and drive mechanism for the ram linkage is conveniently and accessibly located.

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.