Abstract: In a forming process with a press having in a frame a ram closing through the force of a cylinder with a moveable piston against a press table in a straight-line movement, the piston initially acts upon at least one knuckle joint system during the closing of the press, and a hydraulic cushion of the ram concludes the closing process with extension of the knuckle joint system in movement direction of the piston and straight-line support thereof against the frame. In a press having in a frame a ram closing through the force of a cylinder with a moveable piston against a press table in a straight-line movement, the ram is connected so as to be fixed with respect to the frame via at least two identically constructed knuckle joint systems, and the ram has a hydraulic cushion.

Abstract: A pressing device employed to press protection blocks to a workpiece, includes a seat, a transmission assembly and four pressing assemblies. The transmission assembly includes a connecting rod, a rotation shaft, a gear, and a transmission member. The connecting rod is pivotally connected to a bottom of the seat and forms racks on one end. The rotation shaft is assembled to a side of the seat away from the pivoting rod. The gear is securely sleeved on the rotation shaft and engages with the racks. The transmission member is securely sleeved on the rotations shaft. Each pressing assembly is connected to the transmission member of the transmission assembly, and when the connecting rod drives the rotation shaft, and the rotation shaft moves the pressing assembly toward the seat, the protection block is then pressed to the workpiece.

Abstract: A screw press includes a drive with at least one spindle nut which is vertically adjustable at a threaded spindle and to which is fastened an upper press part or the like. A guide column is connected at the underside of the upper press part at one end, and the guide column is loaded in tension by the drive during the pressing process.

Abstract: A ram driving method including the steps of fixing one end of a large-diameter piston rod integral with a large-diameter piston reciprocably included in a large-diameter cylinder attached integrally to a ram to a fixing unit, connecting one end of a small-diameter piston rod integral with a small-diameter piston reciprocably included in a small-diameter cylinder integral with the large-diameter cylinder to a moving member moved by a motor driving, integrally moving the small-diameter cylinder and the small-diameter piston and communicating a first compartment and a second compartment of the large-diameter cylinder divided by the large-diameter piston with each other, moving the ram integrally with the small-diameter piston rod moved by the moving member, and communicating the small-diameter cylinder with the large-diameter cylinder, thereby moving the large-diameter cylinder with a strong force by a working fluid supplied from the small-diameter cylinder.

Abstract: The present invention relates to a device and a method for holding tool parts together during a hydroforming process. The device comprises a first portion comprising a first force transmitting surface and a second portion comprising a second force transmitting surface, which are connected by means of a pivot, and a length variable power member which, with a force, tends to turn the second portion in relation to the first portion around the pivot by means of a first lever which is longer than a second lever by means of which a resultant larger force is created which acts between said force transmitting surfaces for holding the tool parts together during a hydroforming process.

Abstract: A differential mechanism 9 of an electric press apparatus having a connecting mechanism 17 fixed to a nut member 8 threadedly engaging with a ball screw shaft 15 rotated by a motor 22 and a slide plate 25 is configured so as to include a frame body 92 which has inner wall surfaces hollowed out with an opening portion being on the upside, and is formed with a slide groove at the bottom portion in inner wall surfaces, the opening portion forming a rigid body. A movable body 91 which is provided with a slide groove on the back surface side of the upper plate portion having an inclined surface portion the back surface of which is inclined, and is fitted in the opening portion of the frame body 92.

Abstract: Precise motion of the ram of a fastener press is controlled by high torque and low torque motors for high speed/low force and high force pressing of the ram by the ram, respectively. The high torque motor means drive passes through a bidirectional overrunning clutch. The clutch is controlled by the relative motion of the two separate motor drive speeds of which are regulated by a controller. The clutching motion is therefore controlled only by the relative speed of its drive versus driven components. This provides an extremely smooth and responsive transition between high speed/low force and low speed/high force operation of the ram so that the pressing cycle can be as fast and efficient as possible.

Abstract: An apparatus and method for joining the assembly components that allows for the adjustment of working stroke and press forces during operation in order to control the thickness of the resulting joint point.

Abstract: A suspension mechanism is formed as a liquid-tight structure by fitting the bottom end of a female screw member using a liquid-tight sealing member provided between a slider and a retainer and by covering the retainer with the liquid-tight sealing member. A highly-pressurized liquid is initially supplied to each clearance formed between any components such as liquid-tight sealing member, female screw member, male screw member and retainer through a liquid supply passage formed through the liquid-tight sealing member. The highly-pressurized liquid is supplied by an amount flows out through the screwing portions between the male and female screw members to maintain the pressure of liquid within the liquid-tight structure in a predetermined range.

Abstract: A suspension mechanism is formed as a liquid-tight structure by fitting the bottom end of a female screw member using a liquid-tight sealing member provided between a slider and a retainer and by covering the retainer with the liquid-tight sealing member. A highly-pressurized liquid is initially supplied to each clearance formed between any components such as liquid-tight sealing member, female screw member, male screw member and retainer through a liquid supply passage formed through the liquid-tight sealing member. The highly-pressurized liquid is supplied by an amount flows out through the screwing portions between the male and female screw members to maintain the pressure of liquid within the liquid-tight structure in a predetermined range.

Abstract: An electric motor and hydraulic pump/motor are combined on a torque level, a press machine is controlled with controllability of an electric motor, and kinetic energy of a slide is regenerated during braking without constraints of slide pressurization or an amount of energy. A screw press drives a slide through a screw mechanism made up of a drive nut and a driven screw. The drive nut is provided with a ring gear integral therewith and this ring gear is engaged with a gear provided for a drive axis of an electric motor and a gear provided for the drive axis of a hydraulic pump/motor. The hydraulic pump/motor is connected to a constant high pressure source that generates a quasi-constant pressure hydraulic liquid and a low pressure source. This allows the electric motor and hydraulic pump/motor to be combined on a torque level.

Abstract: A linear actuator, which may be used as a rock trimmer, comprises a support member extending upwardly from a work surface, and a first cleaving member coupled to the support member so as to be disposed above the rock sample opposite the work surface, the first cleaving member having a working axis. The linear actuator also comprises a positioning mechanism and a hydraulic mechanism, each being operatively associated with the first cleaving member. The positioning mechanism provides for imparting rectilinear travel to the first cleaving member so as to selectively adjust the position of the member relative to the work surface, along the working axis. The hydraulic mechanism produces a working force that is transmitted to the first cleaving member for application to the rock sample. The force is applied to the sample, directed downwardly toward the work surface substantially along said working axis. The positioning mechanism and hydraulic mechanism are constructed so as to have a common actuator.

Abstract: A mechanical press has a ram carried by a frame and movable to advanced and retracted positions by a ball screw assembly driven by a reversible motor to actuate a cam and follower assembly connected to the ram by a linkage system. The linkage system has a pair of pivot links pivotally connected at one end to a fixed pivot shaft connected to the press frame and connected at their opposite end to a follower nut for movement thereby as the follower nut travels along the length of the driven screw. A pair of roller followers are also driven by the follower nut to move between first and second positions within cam tracks formed in a pair of first lever arms operably connected to the ram. In use, when the motor drives the screw in one direction the first lever arms are rotated in one direction to move the ram to its advanced position wherein the ram urges a die or tool into engagement with a workpiece.

Abstract: A closure panel hemming apparatus includes a lower support supporting a lower hemming die and an upper support spaced from and mounted above the lower support supporting an upper hemming die. The upper and lower supports are relatively vertically moveable for bringing the dies toward and away from one another. A plurality of actuators of the ball screw or rack and pinion type is driveably connected to draw together the upper and lower supports, bringing the dies together for edge hemming preformed metal panels nested between the dies. Force application means including one or more clamps are actuated to connect the upper and lower supports upon their movement of the dies to a hemming position. Force is applied to the clamp(s), through separate means or by intensification means driven by the actuators, to draw the dies tightly together for completing the hemming operation.

Abstract: A press brake, or other machine for bending sheet metal or plate metal, comprises a frame, a bed mounted to the frame, and a ram movably mounted to the frame. An assembly for moving the ram relative to the bed to bend sheets and plates of metal positioned between the ram and bed comprises first and second wedges, and first and second inclined ramp surfaces that the wedges slide relative to when moving in first and second directions relative to the frame to move the ram toward and away from the bed for bending operations. The assembly has an actuator which moves the first and second wedges relative to the ramp surfaces. The first and second wedges are drivingly linked to balance distribution of force across the ram. A Vernier scale assembly is mounted generally horizontally with the ram and wedges, to allow setting a scale component to control switching means to stop downward ram movement at a desired point.

Abstract: A single-cylinder hydraulic press has a ram member spaced apart from a lower head die, and a work area being defined therebetween. The cylinder and the piston rod enable reciprocating movement of the ram member relative to the lower head die. A linkage mechanism enables cooperative engagement between the piston rod and the ram member. The linkage mechanism provides rolling contact with the ram member along four distinct linear locations. The linkage mechanism includes four pivot brackets, enabling pivotal rotation of the bell cranks relative thereto, and two lever pins retaining the bell cranks with the piston rod. Sandwiched between the bell cranks are two cam followers, which are driven upwardly and downwardly by the piston rod, the bell cranks each including a pair of rollers which engage with the ram member and provide "four point" contact therewith.

Abstract: A single-cylinder pneumatic press has a ram member spaced apart from lower head die, and a work area being defined therebetween. The cylinder and the piston rod enable reciprocating movement of the ram member relative to the lower head die. A return spring biases the ram member away from the surface. A linkage mechanism enables cooperative engagement between the piston rod and the ram member. The linkage mechanism provides rolling contact with the ram member along four distinct linear locations. The linkage mechanism includes four pivot brackets, enabling pivotal rotation of the bell cranks relative thereto, and a lever pin pivotably connecting the bell cranks together. Sandwiched between the bell cranks are two cam followers, which are driven upwardly and downwardly by the piston rod, the bell cranks each including a pair of rollers which engage with the ram member and provide "four point" contact therewith.

Abstract: A corner bending unit (2) for achieving a reciprocating movement in a tool holder (14) for a bending tool (12), the tool holder being articulated to a foundation (4) via parallel links (16, 18). The corner bending unit (2) has a pneumatic cylinder (38) with a piston rod (36) which is pivotally (34) joined to a triangle link (30), which is in turn pivotally joined (32) to one end of a link (28), the other end of which being joined to a pivot point (22) on the tool holder. The triangle link is pivotally carried in the foundation (4) about a pivot point (24) and forms, together with the link (28), a knee-joint mechanism (28, 30), which, under the influence of the cylinder (38) piston rod (36), can be moved from the bent-out position shown to a completely extended position, the tool holder (14) being movable between a starting position and a work position. The pivot point (22) is common to parallel link (16) and the link (28), and pivot point (24) is common to parallel link (18) and the triangle link (30).

Abstract: A portable press device for repairing truss joints includes jaw members spaced opposite each other having first and second end portions. A mechanism interconnects the jaw members for relative pivotal movement therebetween. A pair of plate members are disposed at the first end portions of the jaw members with the plate members facing opposite each other for receiving a truss joint therebetween. A lever arrangement is disposed at the second end portions of the jaw members to control the relative pivotal movement of the jaw members. Finally, a drive mechanism is secured to the lever members to selectively move the second end portions of the jaw members to both close and open the jaw members.

Abstract: A bag squeezing apparatus for breaking up bridging of material being delivered from the bag. A pair of jaws are sequentially operated to impact opposite sides of the bag.

Abstract: A press-driven tool module comprising a foundation body including a cylindrical bore; a work ram slidably mounted in the cylindrical bore of the foundation body for sliding movement in non-vertical reciprocal operating and return directions, the ram adapted for receiving a work tool, wherein the work ram is a piston rod of a hydraulic medium activated work piston, and wherein the work piston is slidably mounted in a work space of a work cylinder; a return spring element disposed for urging the ram in the return direction; a hydraulic power cylinder having a displacement space containing hydraulic medium; a vertically displaceable plunger mounted in the hydraulic power cylinder for acting upon the hydraulic medium; and a press ram disposed for acting upon the plunger; a hydraulic pressure line communicating between the displacement space of the power cylinder and the work space of the work cylinder, wherein a supply space is provided in the power cylinder for the hydraulic medium, which supply space, when the

Abstract: In the press working machine, a first working plate is downwardly moved by a rod of an air cylinder. At this time, the lower end of a lock pin is in contact with a horizontal plane, whereby the first working plate is rotated about a second rotation axis. Thus, a first rotation axis is upwardly rotated about the second rotation axis, to further upwardly move a lower mold base. At this time, a lower mold and an upper mold are already in contact with each other, whereby a high thrust is caused between the molds to enable molding/joining of metal plates or the like. Consequently, it is possible to provide a press working machine which can embody both of a low-thrust/high-speed area and a high-thrust/low-speed area through only a single air cylinder.

Abstract: The invention relates to an apparatus for bending a flange into engagement with a workpiece. A bending tool is mounted on a tool holder connected to a stand by a linkage mechanism. The linkage mechanism includes a first link with its ends journalled on a pin on the tool holder and on a fixed pin on the stand, and a second link with its ends journalled on a pin on the tool holder and on a pin, the position of which in relation tot he stand can be adjusted. A first drive member pivots the first link about its fixed pin and a second drive member moves the adjustable pin.

Abstract: A lever unit 11 having a fulcrum regulator 12 movably connected to a first motor 14 and a force point regulator 13 movably connected to a second motor 15, in which the motor 15 is driven while the motor 14 is stopped, thereby moving an injection mold 20A to come close to the other mold 20B, and mold locking of the molds 20A and 20B is executed by driving the motor 15 at this position.

Abstract: A waste container reformer, for reforming generally disk-shaped compacted waste containers into prismatic forms, sequentially presses the sides of the waste container into a prism with a 45.degree.-90.degree.-45.degree. triangular base so that when it is placed adjacent to another reformed container, the two form a rectangular box for more efficient use of storage space. The pressure surfaces are controlled by hydraulic cylinders to provide the forces needed to reform the container. The reforming process is controlled so that one angle is formed at a time, beginning with one of the 45.degree. angles, followed by the 90.degree. angle, and then completed by forming the other 45.degree. angle. By forming one angle at a time, the load requirements of the reformer are reduced, and a consistently similar shaped reformed waste container is created.

Abstract: A device for packing or compressing refuse material into a container, which my be mounted on a vehicle or installed at a fixed site. The device includes a paddle mounted for oscillatory angular motion about a generally vertical axis in a hopper assembly. The paddle is oscillated by a crank arm mounted on the same axis and in a fixed angular relationship with the paddle. The crank arm, in turn, is driven by a pair of extensible devices, such as hydraulic cylinders, which are pivotally coupled to the crank arm and pivotally anchored by their other ends to selected points on the hopper frame. The selection of anchor points for the hydraulic cylinders assures that they act in unison over much of the range of oscillatory motion of the paddle, compressing the refuse repeatedly on alternate sides of the container. In one version of the device, the crank arm and the paddle are aligned in identical angular orientations and the cylinders push in unison to compress the refuse.

Abstract: There is disclosed a refuse system in which a conventional truck chassis includes a conventional garbage loading receptacle with a compaction device therein. The system provides additional compartments for reception of recyclable material. The compartments are individual modules and each include a lateral access opening and a lateral discharge opening with a device located within each for moving material located therein from one opening to the other.

Abstract: A machine for hemming an edge portion of an arcuate panel having a fixed die with an arcuate contour complementary to the panel, a moveable die head having prehemming and hemming dies thereon with edge contours, respectively, complementary to the edge contour of said panel. A single fluid actuator and a cam controlled linkage effect both vertical and lateral movement of both the hemming die and prehemming die relative to the fixed die upon operation of the actuator. A pair of arms are pivotally attached to the prehemming die to form a radius of rotation which controls horizontal and vertical movement of the prehemming die relative to the moveable die head to provide proper clearance and disengagement between the prehemming die and the edge portion of the arcuate panel and/or the fixed die after completion of the prehemming operation.

Abstract: A device is disclosed for pressing objects by lifting the objects into a waiting pressing shaft. The shaft includes a forming element at its lower end for forming the object, and the shaft is engaged by its upper end through a pivot member to an air cylinder in a manner which provides a force advantage to the air cylinder. Also, a system for pressing objects is disclosed, in which the press device is employed in conjunction with a turntable for sequential and continuous pressing operations.

Abstract: Food press of the kind comprising pressing means adapted to operate on the food(s) to be pressed comprising at least one grid (12) and at least one plate (13) between which the food(s) (42) must be disposed, characterized in that hydraulic operating means (15) are associated with said pressing means and adapted to move the grid and the plate towards each other so that they exert pressure on the food(s), the hydraulic operating means (15) comprising at least one single-acting piston-and-cylinder actuator (24) operated by a hydraulic pump (25) adapted to operate in compression and in suction.

Abstract: A press includes a reciprocation unit having a crank structure which is driven in horizontal reciprocation by an associated press drive. A motion direction shifting unit having a link structure is coupled to the reciprocation unit a ram so as to reciprocate the ram vertically between an upper position and a lower rest position in response to the horizontal reciprocation of the reciprocation unit, such that the ram remains in a state of substantial rest with respect to the shifting unit for a predetermined period of time upon reaching the lower position. A control unit controls a hydraulic fluid supply system to cause a pressure applying device to apply a controlled press forming force to the ram when a sensor detects that the ram is in the rest state.

Abstract: A hand-held apparatus for vulcanizing the damaged bead zone of a pneumatic tire. The apparatus includes tongs to engage the bead to be repaired and a hold-up element to engage the diametrically opposite point on the bead. At least one transport and manipulation handle is provided for carrying the apparatus and at least one actuator is included to activate the tongs and the hold-up element.

Abstract: A below ground mining vehicle, and a method for converting an above ground vehicles into the same, which is particularly adapted for transporting workers and/or light equipment. An above ground vehicle, such as a sport utility vehicle, is modified and components are added thereto in accordance with the present invention, to arrive at the below ground mining vehicle. The vehicle includes: a speed limited engine; a transmission having its upper forward speeds disabled; fire suppression means in the vicinity of the engine; a manual fuel shut off valve in the fuel line; an engine intake air shut off valve which closes in response to a temperature sensor detecting an abnormal engine temperature; a battery box enclosing a battery; a circuit breaker serially connected with the battery; fire suppression means in the vicinity of the fuel tank; a fire suppression means in the vicinity of the exhaust muffler; and a back up alarm.

Abstract: A compactor which includes a framework 10 adapted for reception of an open-topped rubbish container 14, a compacting plate 16 pivotally mounted on the framework 10 about an axis 20 adjacent to and parallel to the rear upper edge 22 of the rubbish container 14 and two piston and cylinder devices 28, 34 operable to pivot the plate 16 towards and away from the container 14.

Abstract: Apparatus for bending a margin flange (5) which projects at an angle to a surface of a workpiece (4) against that surface, includes a bending tool (6) which is mounted on a tool holder (7) which by a linkage system (8-13) is connected to a stand (1) which carries the workpiece (4). A drive arrangement (15-24) is connected to the tool holder (7) for movement of the tool holder in relation to the stand (1). The linkage system connecting the tool holder (7) with the stand (1) includes two mutually parallel carrier links (8, 11) each of which is pivotally mounted at one end thereof on a respective journal pin (9, 12) located on the tool holder (7). The other end of one carrier link (8) is pivotally mounted on a journal pin (10) which is fixedly mounted on the stand (1) and which also pivotally carries one end of a connecting link (14), the other end of which is pivotally connected to the other end of the other carrier link (11) by a pin (13).

Abstract: Apparatus for bending a margin flange (5), which projects at an angle to a surface on a workpiece (2), against the workpiece. The apparatus includes a bending tool (6) which is mounted on a tool holder (14) carried by a parallelogram mechanism (7-12) for movement in relation to a stand (1) on which the workpiece (2) is placed. A drive arrangement (17) is drivingly connected to the tool holder (14) by a linkage (21-27). The tool holder (14) includes a main part (13) connected to the parallelogram mechanism (7-12) and a movable part (15) which is pivotal about a journal pin (16) on the main part. The journal pin (16) is substantially parallel with the axes (7, 8, 11, 12) of the parallelogram mechanism. The movable part (15) carries the tool (6) and by a resilient element (32) is urged towards a starting position with a nose of the tool (6) biased away from the workpiece (2).

Abstract: A machine for hemming a panel having a fixed die with an edge contour complementary to an edge of the panel, a movable die head having prehemming and hemming dies thereon with edge contours, respectively, complementary to the edge contour of said panel, a single fluid actuator, and a cam controlled linkage for effecting both vertical and lateral movement of both said hemming die and said prehemming die relative to said fixed die upon operation of said actuator.

Abstract: A screw press comprises an actuator for producing a thrust parallel to an axis of a screw spindle so that by the use of the thrust the screw spindle is axially moved relative to a female screw which is threadably connected with the screw spindle, whereby the screw spindle is rotatably driven.

Abstract: A two stage press comprising a first and second power cylinder, a cam activated by power cylinder, and a base plate for material to be worked wherein a tool can be brought into contact with material at very high pressures, particularly applicable in solderless crimping applications.

Abstract: The apparatus for producing compacted insulating glass comprises two substantially vertical press platens, one of which is adapted to be moved relative to the stationary press platen in a frame in order to perform the compacting operation. Racks extending at right angles to the movable press platen are rigidly connected to the latter and in mesh with pinions rotatably mounted on fixed axes in the frame. A common drive is provided to rotate the pinions in synchronism. The stationary press platen may carry backing rollers, which can be retracted into the stationary press platen.

Abstract: In a crank press having a pedestal and a rotatable crank shaft journaled thereon and connected to a reciprocal top platen guidably mounted on the pedestal to form work pieces, the improvement which comprises a hydraulic motor mounted on the pedestal having a reversible drive shaft connected to the crank shaft, and a hydraulic transmission connected to the hydraulic motor. The transmission includes a pump assembly connected to a reservoir for delivering the pressure fluid selectively under the control of a servo directional valve in a closed hydraulic loop to the hydraulic motor for selective forward and reverse drive together with a safety control to automatically neutralize the pump assembly and control automatic braking of the hydraulic motor drive shaft.

Abstract: An apparatus is disclosed for a two-stage crushing of empty cans along their longitudinal axes to collapse them to minimum bulk. The apparatus has a stanchion fixed to a base and long and short lever arms pivotally mounted on the stanchion. A pivotal linkage interconnects the long lever arm with the short lever arm. First and second crush heads are pivotally mounted between the base and the long and short lever arms with a pantograph type linkage to control the attitude of the crush heads.In the first stage of crushing, the can is placed between the first of the crush heads and the base, and the long lever arm is moved toward the base to partially crush the can axially. In the second stage, the partially collapsed can is placed between the base and the second crush head. The long lever arm is moved toward the base thereby moving the short lever arm toward the base and the can is thereby completely axially crushed.

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: A press for applying nailing plates across joints of wooden trusses and for other like usage is disclosed. A suspension harness for the press is adapted to be carried by an overhead universally movable support. The lower jaw member of the press is rockably mounted on the suspension harness with adjustment means provided to level the work-engaging jaw plates. An operator-controllable power cylinder is connected between rear arm extensions of the press jaws. The work-engaging jaw plate of the upper jaw is rockable on a transverse axis relative to adjustable plate stops. The lower jaw work-engaging plate is finely adjustable to enable the press to apply nailing plates with even pressure and with the proper degree of penetration into the work pieces and to accommodate variations in thickness of work pieces. Spring loaded guards on the lower jaw working-engaging plate prevent accidental displacement of nailing plates prior to application.

Abstract: A novel press brake is disclosed which incorporates a double lever actuating mechanism which is easily adjustable to vary the stroke of the press brake as well as adjusted to counteract the rotational forces imparted to the ram by reason of differential resistances created by the workpiece during the forming operation.

Abstract: The fluid-pressure actuated press is mounted on a column structure. It has a ram, a piston, and an associated piston rod. The free end of the piston rod reciprocates downwardly. A support adjustably mounts the ram on the column structure. A lever bar has a proximate free end in engagement with the free end of the piston rod. The distal end of the lever bar is pivoted about a fixed fulcrum carried by the support. A chuck rod is slidably mounted relative to the support along an axis which is parallel to the axis of the piston rod. The chuck rod is pivotably associated with the lever bar at a point intermediate its ends, whereby the reciprocation force on the piston rod is multiplied by the lever ratio to cause reciprocation of the chuck rod with the multiplied force.

Abstract: A press which is suitable for use in fabricating wooden trusses is disclosed, wherein the press includes a lower stationery press platen and an upper moveable press platen opposing the lower press platen. Bellcranks are mounted on the lower press platen supporting structure on opposite sides of the press. A transfer bar interconnects the upper ends of the bellcranks. A hydraulic cylinder connects the moveable, upper press platen and a bellcrank. Guide rods are provided to guide the moveable upper press platen during vertical movement above the lower press platen.The press exerts substantial pressures upon the trusses or the like being pressed between the platens, while maintaining the platens in a generally parallel relationship, in spite of uneven press loading.