Abstract: A press machine is disclosed for which the main components are a movable ram and a striker device connected to the ram. The striker device includes a striker for striking a tool of the press machine and a drive mechanism to adjust the position of the striker with respect to the tool.

Abstract: The invention provides a punch press and shearing tool which operate to provide a series of cuts linked end-to-end for severing a work piece such as a piece of sheet metal. The shearing tool includes first and second elongated, cooperating cutting blades. Each of the blades has a pair of slidably related faces that slide against one another in a plane of reciprocation. The cutting edges are oriented at a small angle, e.g. 2.degree. to 6.degree., relative to one another to sever a piece of sheet stock progressively along a line with a scissor action. An intermittent work piece advancing motor shifts the work piece toward the cutting blades and parallel to the cut when the blades are apart. Gripping members can be yieldably mounted adjacent the cutting blades to grasp and forcefully hold the work piece in place as one blade moves toward the other. Yieldable stripper members on opposite sides of the second blade engage and independently deal with the stock on opposite sides of the cut.

Abstract: A turret punch press wherein the upper and lower turrets are rotated, and the upper die positioned in the processing position is struck by a piston rod (striker element) of a striker device mounted on the lower end of a ram when the ram is lowered by means of a crank shaft (mechanical vertically moving means). The piston rod can be freely moved vertically by a hydraulic cylinder so that the amount of the stroke of the striker element with respect to the upper die is the sum of the amount of the stroke of the ram and the amount of the stroke of the piston rod in the hydraulic cylinder itself. Accordingly, the upper die and the lower die come into contact and the processing occurs only when the ram and the piston rod are both at bottom dead center.

Abstract: The present invention provides a complex machine tool wherein the punching center is coincides with the cutting work position so that the range of movement of a workpiece is not subjected to any restriction even during the workpiece cutting work in the same manner as in the workpiece punching work. The composite machine tool comprises a plasma torch (16) mounted on the machine tool body near the working position and arranged to be movable freely such that it can be withdrawn from the working position when a workpiece (5) is subjected to die-punching work, and proceeded to the working position when the workpiece is subjected to cutting work. Futher, the machine tool comprises protecting means (18, 19) for protecting the lower turret (3) and other members mounted adjacent thereto from the dross and heat developed by plasma arc during the workpiece cutting work by the plasma torch.

Abstract: A slitter which includes multiple spaced pairs of arbors pivotally mounted to the slitter frame. Each pair of arbors includes cutter assemblies and is alignable with a shiftable bearing housing shiftably mounted to the frame. A drive member is fixedly connected to the bearing housing for correlative shiftable movement and causes correlative rotative movement of one pair of arbors.

Abstract: A device for use with a packaging machine for continuous singulating of a packaging container chain. A frame is provided having a circular shape to guide a packaging container chain along a predetermined circular track. The container chain includes a plurality of uniformly spaced container zones joined together by link zones. A plurality of knives are positioned along the frame at areas corresponding to the link zones and move in a direction perpendicular to the track to sever the packaging container chain at each of the link zones.

Abstract: A turret punch press includes an upper and lower turrets for respectively supporting a plurality of punches and dies; the punches are arranged two-dimensionally in a punch mounting regions on the upper turret and the dies are arranged two-dimensionally in a die mounting region on the lower turret. The turret punch press further includes a ram and a striker for striking the punches. The striker is provided on a bottom of the ram so as to be movable in two horizontal directions above the punches indexed in a processing region. In the turret punch press, when the turret is indexed in the processing region, many punches and dies are simultaneously indexed in the processing region. Thus, by moving the striker in two horizontal directions above the punches indexed in the processing region, many successive punch operations can be quickly performed without intermediate rotation of the turrets.

Abstract: A revolving cutting press comprises at least one revolving plate having a peripheral region provided with a plurality of complete tool sets, a drive for rotating the revolving plate about an axis, at least one tool set rotatable about an axis extending substantially perpendicularly to plane of the revolving plate, the tool sets being connectable with the drive of the revolving plate.

Abstract: A stamping tool for use in an auto-indexable tool station having a number of character inserts that can be rotatably moved below a striker area so that a thin metal plate or sheet of metal may be marked. The stamping tool allows for automatic adjustment of tool length for any variation in material thickness. A pneumatic cylinder actuates a mechanism that engages the key way in the head nut. The tool length is changed by the rotary motion of the auto-indexable tool station. The character housing is rotated by the indexable tool station through the punch key which moves the selected character insert to the striker area within the tool. The striker area causes the character insert which is spring biased to protrude lower than the character inserts that are not in the striker area. When the stamping tool is struck by the ram, only the character insert in the striker area will contact the material to be marked.

Abstract: An indexable multi-tool for punch presses wherein a plurality of individual punches are held at a singly punching station in a turret-type punch press such that any one of the plurality of punches can be selected upon a rotation of a punch carrier relative to the turret. A striker is carried in the indexable station which does not rotate relative to the turret and which contains an axially extending portion under which the selected punch is positioned in order to be used for punching. Stripper buttons are held on the indexable station by a rotating ring for easy removal and die buttons are held in a die carrier to rotate synchronously with the indexable station.

Abstract: A punch assembly which may be provided at a punching station in a turret punch press. The punch assembly includes a striker body having a solid portion, and a punch carrier which carries a plurality of individual punches. A selectively actuable stop holds the striker body stationary, allowing the punch holder to be rotated so that a predetermined one of the plurality of punches will underlie the solid portion of the striker body. Afterwards, the entire punch assembly may be rotated to a variety of angular orientations. At any of these orientations, the ram may be actuated to cause the punch to extend downwardly below the punch assembly and through a sheet of material. The rotation of the punch assembly to different orientations allows a single punch to be used to punch holes of the shape but with differing angular orientations. The die holder receives a plurality of corresponding dies having openings therein corresponding to the punches.

Abstract: A punch for a punch press includes a punch holder which is installed on a punch installing portion of the punch press and a plurality of punch bodies so supported on the punch holder as to be independently movable in the vertical direction. Shearing blade portions are formed on the lower ends of the respective punch bodies. The shearing blade portions have elongated configurations, each extending in a different direction in the horizontal plane.

Abstract: A multitool punch holder is disclosed in which a tool carrier (22) holds a circumferential array of punches (76) in a corresponding series of bores. Each punch (76) is attached to a stem rod (50) having an upper end protruding above the tool carrier (22). The tool carrier (22) is rotated by an index drive (102, 104, 106, 108) so as to bring a selected one of the stem rods (50) beneath a ram drive features (100) protruding radially outward to lie above the stem rod ends (52). The tool carrier (22) is coupled to the ram (14) by a head member (20) which is telescopically received therein allowing the ram (14) to continue its descent after contact of the tool carrier (22) with the workpiece, the ram (14) having a feature (100) engaging a selected stem rod end (52) lying beneath the ram drive feature (100) to cause advance of the attached punch (76) against the resistance of an encircling stripper spring (62).

Abstract: A punch assembly for a punch press is described which includes an external housing or sleeve having a punch slidably mounted therein with a spring such as a disc spring for yieldably biasing the punch toward one end of the sleeve and a removable stripper plate mounted on the sleeve in a position around the operating end of the punch. The punch is preferably keyed to the sleeve in more than one location and the stripper plate guides the punch by preventing rotation as well as lateral deflection. A retaining member such as a ring surrounds the stripper plate and can be manipulated manually, e.g. by rotating it, to enable the punch and stripper plate to be ejected by means of a spring.

Abstract: A punch press, of the type capable of producing a piece from a sheet of material, the piece being attached to the sheet by a tab, is provided with a separation assembly that fits into a standard tool station. The invention provides for parting of the piece from the sheet, and automatic transport of the parted piece to a position overlying a hinged drop door provided as part of a removal assembly. The invention eliminates the need for manual parting and removal of the piece from the punch press.

Abstract: A revolving cutting press comprises at least one rotatable supported revolving plate having a peripheral region provided with a plurality of tool receptacles which are formed for receiving tool sets and are spaced from one another, a working station arranged so that any of the tool sets can be transferred to the working station during rotation of the revolving plate, a plunger which can be coupled with the tool set in the working station, and a tool magazine containing at least two tool receptacles for tool sets and arranged in the peripheral region of the revolving plate so that tool magazine is supported on the revolving plate and movable relative to the revolving plate, and any of the tool sets which are held in the tool magazine can be transferred to the working station and coupled with the plunger.

Abstract: A machine tool having a machine frame open on three sides in the shape of the letter C, comprising an upper die support, disposed on the machine frame and vertically movable by a drive cradle, with at least two die holding fixtures placed side by side and having corresponding upper dies, a lower die support disposed on the machine frame with a corresponding number of die holding fixtures placed side by side and having corresponding lower dies, and a matrix plate clamped on the lower die support, disposed in a frame containing the die holding fixtures. In this configurement, it is possible to use a self-guided tool unit in an equally flexible manner as the normal upper and lower dies, by disposing, instead of a lower die, a tool unit comprising an upper die and a lower die contained in a guide frame, such as a cutting unit or a coping unit, on a matrix plate in a corresponding die holding fixture, and to drivingly couple it with the upper die support.

Abstract: A multitool punch holder (12) having a head member (26) coupled to a punch press ram (16) as the press upper turret plate (22) rotates to bring the punch holder (12) into alignment with the ram (16). The punch holder (12) includes a rotary tool carrier (56) carrying a series of punches (80), each able to be selectively rotated into alignment beneath a striker rod (100) slidably mounted in a non rotating body member (30). Stroking of the ram (16) causes an engagement feature (108) to engage the striker rod (100) when the head member (26) telescopes into the body member (30) after axial movement of the holder (12) is arrested by contact with the workpiece (120). The striker rod (100) is then driven to force the coupled individual punch (80) into the workpiece (120). The striker rod (100) is urged to a raised position by an encircling stripper spring (110).

Abstract: A turret punch press machine comprising a frame consisting of a base frame portion, column portions extending from the base frame portion, and an upper frame portion horizontally extending from the column portions. The upper frame portion is divided into first and second upper frame portions, a hammer and a hammer driving mechanism are attached to the first upper frame portion. An upper turret of paired ones, each having plural die halves at the circumferential rim portion thereof, is attached to the second upper frame portion, whereas another lower turret is attached to the base frame portion. Even when the first upper frame portion is deformed by the repulsive force and the like of the hammer which is being operated, the second upper frame portion is left undeformed so that the upper and lower turrets cannot have an undesired positional relationship.

Abstract: A punch apparatus for punching hole patterns in thin sheet material. The apparatus includes a housing having a liquid-cooled cavity therein; a coil mounted in the liquid-cooled cavity; a driver disk made of a highly conductive material mounted in the liquid-cooled cavity, the driver disk mounted adjacent to the coil; a driver button located outside of the liquid-cooled cavity but in communication with the driver disk; and a punch element for perforating thin sheet material aligned with the driver button. Finally, the apparatus includes an electrical source for energizing the coil with a pulse of electrical energy for generating flux linking the driver disk and the coil to repel the driver disk from the coil, thereby translating the driver button and the punch element, causing the punch element to perforate a thin sheet of material.

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: A punch apparatus for punching holes in thin sheet material including a frame, a punch element mounted on the frame for rectilinear movement, which further includes a planar element of conductive material mounted on the punch element, a coil on the frame mounted adjacent to the planar element, a carriage for supporting and positioning the sheet in the path of the punch element, leads connected to a source of electric current to energize the coil, a mechanical arrangement to rebound the punch element, and a programmable apparatus to selectively move the carriage and energize the coil to thereby produce a punched hole pattern in the sheet.

Abstract: A method and apparatus for forming planar parts (WA) by progressively punching out the shape of the part (WA) from a piece of sheet material (W) in which the part (WA) is automatically removed from the remaining sheet material (W), by a hinged trap door section (37) in a work supporting table (33), one end lowered to form a chute. The punching process is carried out primarily in a first punching station (A), where punch and die set magazines (18, 19) may be mounted, but connecting sections (WC) are left to be removed in a second punching station (B) where the trap door section (37) is located. The separated parts (WC) are deposited on a conveyor system (36) located beneath the table 33, and detector unit (59, 61) enables shut down of the press if a part fails to move after each punching operation.

Abstract: A tool changer for rotatable tool assemblies in punching machines has coaxial, upper and lower synchronously rotatable tool housings (1,2). These are parted along a plane through the rotational axis to form a stationary rotatable guide part (11,11') and a guide part (12,12') radially movable relative said axis. The respective parts (11,12 and 11',12') can be latched to each other for receiving and guiding coacting tool assemblies. Transfer means (20,21) transfer tool assemblies between a turret magazine (30,31) and the tool housings. The transfer means are coupled to the movable guide parts (12,12') of the housings. The coupling permits the housings to be rotated after the movable guide part with the aid of its transfer means has moved a tool to a working position in the tool housing and the guide parts of the housing are mutually latched.

Abstract: A combined bending and cutting machine suitable for bending and cutting metal plate has a frame and a female bending die holder extending transversely across a lower part of the frame and supported thereby. The female die holder has a transversely extending upwardly-open recess for receiving a female bending die. A male bending die holder is mounted on the frame above the female die holder for vertical movement relative to the frame and female die holder, and a male bending die is mounted on a lower end of the male die holder. The male die holder is movable towards and away from the female die holder to bend a metal plate positioned between the male and female bending dies. A transversely extending clamping member above the female die holder is movable towards and away from the female die holder to clampingly engage a metal plate mounted on the female die holder.

Abstract: A method of and apparatus for controlling the heat deformation of machine tools having a plurality of frames is disclosed in which the temperatures at symmetrical or opposite portions of the frames are measured, analyzed and then utilized to maintain the temperatures of the frames at the same temperature, or to maintain a constant temperature difference between the frame portions. The frame portions may either be heated or cooled to obtain the desired temperature.

Abstract: An automatic material loading, positioning and unloading system is disclosed in connection with a machine tool turret punch. The device includes a loader which receives a stack of sheets to be fed to the punch machine. The loader includes means for lifting the sheets one at a time from a storage area, means for transporting the sheets to a loading area of the punch worktable and means for unloading the sheets at the worktable area. The punch machine includes automatically controlled workpiece grippers which receive the sheets from the loader, properly position them with respect to the machine tool, move them in a predesired sequence through the machine and transport them to an unload area of the worktable. The unload area of the worktable is effective to discharge the punched sheets from the machine to an unload stacker. The unload stacker receives and stacks completed sheets.

Abstract: An automatic material loading, positioning and unloading system is disclosed in connection with a machine tool turret punch. The device includes a loader which receives a stack of sheets to be fed to the punch machine. The loader includes means for lifting the sheets one at a time from a storage area, means for transporting the sheets to a loading area of the punch worktable and means for unloading the sheets at the worktable area. The punch machine includes automatically controlled workpiece grippers which receive the sheets from the loader, properly position them with respect to the machine tool, move them in a predesired sequence through the machine and transport them to an unload area of the worktable. The unload area of the worktable is effective to discharge the punched sheets from the machine to an unload stacker. The unload stacker receives and stacks completed sheets.

Abstract: A punch press having multiple punch tool rotatable turrets wherein at least one of the punch tools on each of upper and lower turrets is indexable to different angular orientations. Rotation of the indexable punch tools is accomplished by a slideably mounted motor for engagement with a timing pulley, which through a timing belt and a harmonic gear drive, acts to rotate the punch tools. A brake and position sensors are also provided. Synchronization of punch and die orientation is achieved through servos and control.

Abstract: A combined bending and cutting machine suitable for bending and cutting metal plate has a female bending die holder extending transversely across a lower part of the frame and supported thereby, the female die holder having a transversely extending upwardly-open recess for receiving a female bending die. A male bending die holder is mounted on the frame above the female die holder for vertical movement relative to the frame and female die holder. The male die holder is moved vertically towards and away from the female die holder to bend a metal plate positioned between the male and female bending dies. A transversely extending clamping member above the female die holder is movable towards and away from said female die holder, the clamping member carrying a plurality of fluid-pressure-operated clamping devices operable to clampingly engage a metal plate mounted on the female die holder when the clamping member has been moved towards the female die holder.

Abstract: A first drive means is provided to an upper turret and a lower turret in such a manner as that the upper turret and lower turret can be synchronously rotated through a turret drive system, and a second drive means is provided to an upper metallic mold and a lower metallic mold in such a manner as that the upper and the lower metallic molds can be synchronously rotated within the respective turrets through a metallic mold drive system, and the metallic mold drive system is connected to the turret drive system through a differential gear mechanism. And, when the turrets are positioned, the second drive means is held stopped and the metallic molds each holding its own dividing angle are rotated within the respective turrets by the first drive means through the differential gear mechanism. The dividing of the angles for the respective metallic molds is carried out through the differential gear mechanism by the second drive means while maintaining the turrets positioned and stopped.

Abstract: A sheet or plate metal machining tool featuring a clamp for gripping the edge of the metal sheet and recognizing the said clamp is in a position to be struck by the tool's machining section. Upon such recognition, the clamp is capable of releasing the sheet and rotating out of the way of the machine tools.

Abstract: A punch press uses a punch tool assembly which contains at least two punch pins of different diameters or cross-sections which are readily interchangeable in the working position by a control element which is slidable about the pin support member, and actuating means. When the punch tool assembly is rotatable about the ram to effect the movement of the punch pins from operative to inoperative positions, then a cooperating movable die is provided in order to ensure that the aligned die bores are cooperatively dimensioned and configured with respect to the punch pins.

Abstract: Parts which cannot fall because of their dimensions through an opening of a lower tool are separated from a workpiece plate in a cutting press with an immovable support, a coordinate table, two lateral workpiece supports movable parallel to the y-axis and a transverse carriage displaceable in the direction of the x-axis and having clamping elements, and with a central workpiece support of a plurality of articulately connected supporting elements displaceable in the direction of the y-axis so that a discharge opening for the separated part of the workpiece plate is openable or closable, in such a manner that first a cutting tool separates a workpiece part so as to retain at least one connecting web between separating edges of the workpiece plate and the workpiece part located transverse to the direction of movement of the central workpiece support, the workpiece plate and workpiece support being positioned by the coordinate table above the discharge opening, and before opening of the discharge opening the conn

Abstract: An apparatus for punching a workpiece has a stationary frame, a longitudinally extending row of horizontally spaced and upwardly facing different dies fixed on the frame below a horizontally elongated punching station, at least one horizontal and stationary rail fixed on the frame, and a punch carriage displaceable horizontally along the rail above the station. A turret rotates about a horizontal turret axis on the carriage and carries a plurality of radially outwardly directed different punches angularly spaced about the turret axis. A positioning unit is operatively connected between the carriage and the frame for displacing the carriage through a plurality of positions in each of which the turret axis is above one of the dies. An indexing unit angularly displaces the turret about its axis through positions in each of which one of the punches is facing down in the station toward the respective die.

Abstract: In a press comprising upper and lower turntables for carrying respective sets of upper and lower press tools, each upper press tool is movable to an operating position in which said press tool is adapted to be coupled to a ram. To ensure a free access of the workpiece to the press tools adjacent to the lower press tools, each lower press tool is mounted in the lower turntable to be individually vertically displaceable relative thereto. Only the lower press tool which is in operating position is supported in the frame and the other lower press tools are lowered.

Abstract: A machine tool for working sheet metal is described. The principal characteristic of the present invention lies in the fact that it comprises electronic apparatus operable to control the adjustment of the stroke of a striker which can strike a pin supporting a tool for punching or nibbling a metal sheet.

Abstract: A turret punch press is provided with a rotatable upper turret holding a number of upper tools and a rotatable lower turret holding a number of lower tools. One pair or more of the upper and lower tools are so arranged as to be rotatable in the upper and lower turrets, respectively, and are connected and disconnected with a drive.

Abstract: The bending and shearing machine according to the invention comprises a framework, a table which can be vertically displaced and on which sheet metal, such as steel sheets, may slide as well as a rocker head which can be pivoted 180.degree.. The displacement of the table is carried out by means of a system including levers and pistons. One of the horizontal edges of the rocker head carries a knife while the other holds a wedge or a bending roller. The table includes a cutting matrix which carries a knife mounted at the end of the table and a bending matrix shaped to rest on the cutting matrix. The rocker head pivots according to an eccentric axis so that its knife and its wedge or bending roller are offset with respect to one another when they are in operation.

Abstract: The punch, stripper and die holders of a punch press are moved bodily toward an indexable turret and automatically pick up a punch, a stripper and a die from the turret preparatory to being shifted bodily away from the turret to perform a punching operation. When the punching operation is completed, the holders return the tools to the turret, the turret is indexed and then the holders pick up a different set of tools from the turret. Means are provided for shielding vulnerable areas of the holders from debris created during the operation of a plasma-arc torch which is associated with the press. The tools on the turret also are shielded from the debris.

Abstract: A cutting press for treating plate-shaped workpieces includes a coordinate table and a stationary support which surrounds the working area of a cutting tool. A central workpiece support is mounted on the coordinate table for movement in lateral guides of the latter toward and away from the stationary support independently of the movement of the coordinate table, so as to open and close a discharge opening between itself and the stationary support. The central workpieces support includes a plurality of elongated support elements extending transversely of the direction of movement of the central workpiece support in the lateral guides and articulately connected in series to one another. Driving units are provided which act on the ends of the movable central workpiece support for moving the same relative to the coordinate table.

Abstract: A turret punch press having a pair of upper and lower turrets ono which a plurality of pairs of upper and lower punching tools are mounted to punch a variety of holes in sheet materials is disclosed. Each of the upper and lower turrets is synchronously rotatable such that the upper and lower punching tools may be synchronously rotated or indexed in order to punch holes of the same size and shape, but different orientation, in the sheet material.

Abstract: A turret type punch press machine, adjustable means for aligning tool elements of spaced rotors comprising, a supporting member for at least one of the rotors, the supporting member being pivottably connected to a main frame of the machine, adjustable positioning and locking means for providing limited vernier adjustment of said supporting member about its pivot point on the machine, an indexing mechanism mounted on the supporting member providing for multi-position indexing of the rotor about its axis, and wherein the indexing mechanism is adjustable to provide limited angular positioning of the rotor for each indexed position thereof and to provide, in conjunction with the adjustable positioning of the supporting member two limited and substantial orthogonal directions of adjustment of the position of a tool mounted in the rotor on the supporting member.

Abstract: A stripper arrangement for a tool includes a stripper, a stripper shoe mounted on a lower side of a tool holder of a tool and having an opening for receiving the stripper so that the latter can be inserted into the opening by movement in a plane transverse to the axis of the tool, a retaining member displaceable between an operative position in which it engages and retains the stripper and an inoperative position in which it does not engage the stripper, and a spring urging the retaining member to the operative position. An auxiliary tool for replacing the stripper has an abutment face arranged to abut against a lower side of the stripper, and a projection extending toward the stripper and arranged to displace the retaining member to its inoperative position so as to disengage the retaining member from the stripper. The auxiliary tool may also clamp the stripper for removal or insertion of the latter.

Abstract: A slitter and readily removable head includes a drive housing and an idle housing projecting from a base with the arbors for the slitting knives extending between the housings. The lower arbor is journaled in vertically movable blocks with a jack system in the base thus moving the lower arbor. The idle housing and arbors are movable on the base as a unit away from the drive housing so that the idle housing and arbors may readily be removed and replaced. The lower arbor journal block of the idle housing includes a T-slot socket engageable with one or more jacks at a certain horizontal position so that arbors of different length may be employed. The idle housing and arbors forming the removable head contain no gearing, jacks, jack drive connections or fluid or electrical lines requiring connection or disconnection. A turntable may be employed to move the disconnected head to a storage or retooling location.

Abstract: A punch press having a punch holder and a die holder rotatably mounted on vertically spaced upper and lower plates, respectively. A punch and the corresponding die are held in the punch and die holders, respectively, for rotation therewith. The punch is cooperable with the die to machine the workpiece positioned therebetween when a predetermined angular attitude of the punch relative to the die is maintained. A detector is provided for checking whether the predetermined relation in angular attitude between the punch and the die is maintained when they are in their home positions and when they are angularly displaced from their home positions. Preferably, the upper and lower plates are arranged into upper and lower turrets rotatably holding a plurality of circumferentially spaced punch and die holders, respectively.

Abstract: A pneumatic press assembly 10 uses air pressure to power a piston 70 in a cylinder 52 through a power stroke. Springs 76, 78, 80, 82, 84, and 86 oppose the motion of the piston 70. A set of return springs (76 and 78) is effective over the entire stroke of the piston. The return springs are compactly mounted within the cylinder 52 between the bottom of the piston 70 and a shoulder 56 which extends radially inwardly from the cylinder wall. The shoulder also cooperates with a central portion 110 of the piston 70 to prevent rotation of the piston. A second set of springs (80, 82, 84, and 86) is effective only when the piston 70 is within a predetermined distance from the bottom of the power stroke. The second set of springs 80, 82, 84 and 86 is disposed between the bottom 230 of the cylinder 52 and a preload member 234. When the piston 70 approaches the bottom of its stroke, it contacts the preload member 234 which in turn compresses the springs 80, 82, 84, and 86 bringing the piston to a halt.

Abstract: A slitter having multiple spaced pairs of arbors carried upon a rotatable housing which is shiftable as a unit toward and away from a second housing which is adapted to support a selected pair of such arbors during the slitting operation.

Abstract: A rotary transfer press apparatus wherein a plurality of workpieces are simultaneously and progressively moved over a circular path through a series of working stations which themselves are arranged in a circular path whereby successive operations are performed on each workpiece to obtain a finished product for each cycle of the press.

Abstract: A turret indexing system for a turret punching machine having a plurality of equally spaced tool punching stations carried on the turrets which may be rotatably positioned to place selected punching tools in register with a punching ram. Turret indexing is accomplished with a pneumatic cylinder driven reciprocating drive arrangement utilizing a pneumatically actuated clutch to drive the turrets through a one direction, incremental indexing rotation which is equivalent to one tool punching station spacing. A shot pin arrangement is effective to lock the turrets in an operating position and provide small corrective repositioning of the turrets, when required, to precisely position the turrets relative to the punching ram. A control system provides an automatic sequenced cycling of the indexing system to position each required punching tool in an accurate punching position.