Abstract: The drawing press according to the invention includes a support structure for supporting a metal sheet holder which is part of a tool and supported on the press frame via the support structure. The metal sheet holder is assigned a plunger with a die tool, whereas the plunger is moved by means of a plunger drive which includes a blocking position. The blocking position is obtained, for example, by a drive which, in the blocking position does not transmit any movement of the drive output to the driving servomotor. This can be achieved, for example, by an eccentric drive in the stretched position thereof. For performing the actual drawing stroke, the stamping tool is vertically movably supported. A carriage is raised or lowered by the press table by means of a table drive. As table drive, preferably a servomotor with a non-linear drive, such as an eccentric drive is used.

Abstract: A press machine includes a press frame, a crankshaft having a first eccentric portion, at least one crankshaft motor connected to the crankshaft, a ram, an upper tool section supported by the ram and a lower tool section fixedly attached to the press frame, a linkage type ram drive mechanism connected to the crankshaft and including at least one pivot support pin, and a ram adjustment mechanism including a pivot support member supporting the at least one pivot support pin. Wherein the at least one secondary ram drive link is pivotally connected at a first end to the at least one pivot support pin and at a second end to a first end of the at least one main ram drive link. The at least one main ram drive link is pivotally connected at a second end to the ram.

Abstract: A press machine includes a press frame having first and second portions, a crankshaft, a crankshaft, a ram, a ram drive mechanism supported by the first portion of the press frame at a primary force application location, a ram guide linearly guiding the ram, and supported by the second portion of the press frame at a ram guide location; and a working tool including an upper tool section and a lower tool section configured for the processing of a workpiece. The upper tool section is fixedly attached to the ram and the lower tool section is fixedly attached to the press frame at a lower tool location. The primary force application location has a first working position during the processing of the workpiece, and a second resting position when the workpiece is not being processed. The ram guide location has a first working position during the processing of the workpiece, and a second resting position when the workpiece is not being processed.

Abstract: A press machine includes a press frame, a crankshaft having an eccentric portion, at least one crankshaft motor connected to the crankshaft, a ram, a linkage type ram drive mechanism operably connected between the ram and the crankshaft, a first motor, with a first rotary position feedback device, a second motor with a second rotary position feedback device. The eccentric portion of the crankshaft is located between first and second ends of the crankshaft.

Abstract: A toggle clamping mechanism for an injection molding machine includes a toggle link, a crosshead connected to the toggle link, and a driving device for driving the crosshead. A ball spline shaft is provided parallel to a ball screw for driving the crosshead. Further, a ball spline nut provided in the crosshead is engaged with the ball spline shaft so that the crosshead may be guided by the ball spline shaft.

Abstract: An apparatus and method for densifying a fibrous mat, such as scrim, to achieve a uniform mat density, comprising a set of parallel bars each having a row of pins extending downward therefrom which can engage the mat fibers, a plurality of shafts along which the bars slide so as to maintain the bars parallel, a plurality of extendable accordion linkages connecting the set of bars, and a linear positioning assembly having a reciprocating drive mechanism coupled to one of the bars which can move the bars in response to an actuation signal. As the drive mechanism retracts the bar to which it is coupled the spacing between the rows of bars is decreased uniformly and the rows of pins draw the fibers together and compress them uniformly across the width of the mat.

Abstract: A lid construction is described for compression of the content of a container, where a body in connection to the lid of the container is set up to create a pressure down onto the content such that it is compressed. It is characterized in that it comprises a moment arm construction which on rotation is set up to push the element down to its active position, and to be pulled up to its passive, rest position. The moment arm construction is preferably integrated in the lid, and it comprises compacting a relatively longer arm part (40a,40b) which is firmly connected to the relatively shorter arm part (48a,48b), and where the moment arm is rotary mounted in the lid. Also described is a construction of a docking station for a waste container and where the lid construction is integrated. Application of the inventions is also described.

Abstract: A waste bin with an automated waste compaction mechanism and a automated gate lifting mechanism for convenience usage. The present invention makes use of sensors and switches to allow the compaction and gate mechanism to operate automatically. The unique combination of components also ensures the reliability of the mechanism.

Abstract: The present invention provides an apparatus for loading soft materials and methods for using the same. In some embodiments, the apparatus is a gearless mechanical loading apparatus which converts a rotational movement of one end of a first element into an arc of a circle movement of the other end of the first element; and converts the arc of a circle movement of the other end of the first element into a precision two-dimensional lateral movement of a second element.

Abstract: A servo-press machine determining whether or not a drive power supply voltage between a positive power supply path and a negative power supply path that connect a power supply device and a motor rotation control section is lower than an induced voltage of a servomotor, and correcting speed-related data based on slide motion information when the servo-press machine has determined that the drive power supply voltage is lower than the induced voltage.

Abstract: An overload protector has an input element, an output element juxtaposed with the input element, and a clamping plate. Fasteners fix the clamping plate to one of the elements against relative movement. A coupling between the clamping plate and the other of the elements permits only limited relative movement of the elements through a stroke having a predetermined length in a predetermined direction. A connector between the clamping plate and the other element fixes the clamping plate and the other element together against relative movement until an overload force greater than a predetermined critical limit is exerted shifting either of the elements toward or away from the other element in the predetermined direction.

Abstract: A press machine controller (10) for controlling a press machine (30) having a servo motor (41) to drive a slide (38) via a reduction mechanism (37) changed in reduction ratio in accordance with the position of the slide (38) is disclosed. The device includes a command generator (20) for generating at least one of a position command, a speed command and a torque command for the servo motor (41); a vibration command generator (13) for generating a vibration command based on a parameter preset for the press machine controller (10); a slide position detector (12) for detecting the position of the slide (38); and a vibration command adding portion (21, 22, 23) for adding the vibration command to any one of the position command, the speed command and the torque command for the servo motor (41) in the case where the slide position is in a predetermined range. The press machine, even if stopped with the slide at the bottom dead center, can be restarted with a small torque.

Abstract: A mechanical press for fine blanking, forming and/or stamping of work pieces has a machine frame provided with a head piece and an O-shaped frame, the head piece receiving in a fixed arrangement a fine blanking or forming head having an upper tool part, a ram provided in the O-shaped frame having a table top for fixing a lower tool part, the ram being actuable along a vertical stroke axis, and a toggle mechanism with a first and second side that is positioned below the ram. The toggle mechanism includes a connecting rod having a substantially equilateral triangle shape with articulation points pivotally attached to arms that pivot about a fixed bearing on the press machine and the ram, respectively, as well as around the connecting rod. Another portion of the connecting rod is attached to synchronous motors through a gear and shaft arrangement at another fixed bearing on the machine press. A computer controller adjusts the motors to equal path-time characteristics.

Abstract: A method and a device for bending a metal hollow thick walled member to a predetermined angle without deviation of the bending center position and without separation from a half die when presser die moves up. With a pair of guide plates (GP1 and GP2) turnably attached to a center pin CP kept horizontal and the axis center of the center pin intersecting with the axis center of the metal hollow thick walled member PM, the member PM is mounted on a half die (82a). When die holding members (80a and 80b) fixedly connected to the above guide plates and kept horizontal are inclined and separated from each other as the center pin lowers, the member PM is bent to the predetermined angle and held on the half die (82b). When the center pin that can be moved vertically by a guide member moves down to a predetermined position, a contact portion (96b) contacts the inclined surface of a stopper (92b) to allow a base plate (16) to receive a pressing force from an upper die via the stopper.

Abstract: The present invention provides a linear motor mounted press machine which uses a boosting mechanism to enable machining with a greater press tonnage using a press driving source with relatively low power and which, for machining with a smaller press tonnage, enables efficient high-speed machining. A linear motor mounted press machine includes a boosting mechanism 10 having an output portion that performs a rectilinear reciprocating operation, a first linear motor 11 coupled to an output portion of the boosting mechanism 10, a second linear motor 12 having an output shaft that drives a press tool 6 forward and backward, and a coupling switching mechanism 13. The coupling switching mechanism 13 releasably couples the output shaft of the second linear motor 12 to the output portion of the boosting mechanism 10. The boosting mechanism 10 is a toggle-type link mechanism or the like. A servo motor and a crank mechanism or the like may be used in place of the first linear motor 11.

Abstract: High production processing and high accuracy processing are selectively performed with a single press. To this end, there are provided a system and method for controlling a servo press 1 in which an eccentric rotation mechanism 20 is driven by a servo motor 21 and the rotating power of the eccentric rotation mechanism 20 is transmitted to a slide 3 through a toggle linkage 15, thereby vertically moving the slide 3. In the control system and method, the rotation of the servo motor 21 is controlled in response to a motor speed command rm calculated based on the deviation ? p of the position of the slide 3 and a positional gain G(?) preset according to a speed ratio of the slide 3.

Abstract: A toggle press is provided with two levers (14, 16) which are pivotably connected by means of a joint (18), the first of which (14) is connected at its free end to a pressing tool (22) and the second of which (16) is rotation-resistantly mounted at its free end on a shaft (28) which can be rotated by a drive unit. The rotation-resistant connection between the second lever (16) and shaft (28) is releasable when the toggle lever reaches the extended position. The second lever (16) is disposed on a section of shaft (28) contrived as an eccentric cam (44).

Abstract: A double-action mechanical press is capable of easily keeping the dynamic balance, simpler in structure and provides an improved processing accuracy by maintaining the parallelism in upper and lower rams. The double-action mechanical press has a crank mechanism within a double-action crown. The crank mechanism comprises a crankshaft having two of first eccentric sections and two of second eccentric sections. A bed includes two oppositely rotatable toggle linkage mechanisms which rotate oppositely from one another. The two first eccentric sections are connected to the upper ram to move it in the upward and downward directions. The two of second eccentric sections are connected to the lower ram through a plurality of upright rods with the two toggle linkage mechanisms to move the lower ram in the upward and downward directions.

Abstract: A gang punch tool assembly and method is provided for punching holes in a plurality of greensheets which are processed sequentially through the assembly. The punch mechanism is a gang punch cooperating with a corresponding die and the greensheet is automatically fed to the gang punch and die, the greensheet punched and then the punched greensheet removed from the punch area and another greensheet positioned for punching. Operation of the gang punch apparatus is efficient and effective and has a high greensheet throughput. A preferred gang punch uses a pressurizable air chamber for controlling punching of the greensheet without damage to the greensheets or gang punch mechanism.

Abstract: An arm structure for an injecting molding machine includes arms consisting of two pairs of two arms respectively having plural parallel pivotal plates having two ends pivotally connected with plural position plates of a receiving disc and a movable mold base. Each position plate has an outer end concave surface with a threaded hole. Each pivotal plate has an outer end is bored with a pivot hole and fits in a gap between every two position plates. Further, a tubular pivot has plural through holes spaced apart corresponding to the threaded holes of said outer end concave surfaces of the position plates for bolts to pass through and screw with the threaded holes. Then the arm structure is pivotally connected to the receiving disc and the movable mold base. Therefore, the arm structure is easily assembled with or disassembled from the receiving disc and the movable mold base by only screwing off the bolts, without need of removing the connecting rods.

Abstract: A gang punch tool assembly and method is provided for punching holes in a plurality of greensheets which are processed sequentially through the assembly. The punch mechanism is a gang punch cooperating with a corresponding die and the greensheet is automatically fed to the gang punch and die, the greensheet punched and then the punched greensheet removed from the punch area and another greensheet positioned for punching. Operation of the gang punch apparatus is efficient and effective and has a high greensheet throughput. A preferred gang punch uses a pressurizable air chamber for controlling punching of the greensheet without damage to the greensheets or gang punch mechanism.

Abstract: A die closing device of an injection molding machine includes a stationary die clamping plate, a movable die clamping plate, and a toggle lever pair connecting the clamping plates. The toggle lever pair includes a first connecting rod and a second connecting rod, the first connecting rod being pivotally connected to the stationary die clamping plate, and the second connecting rod being pivotally connected between the first rod and the movable die clamping plate. The device further includes a powered driver operable for imparting motion to at least one of the first and second connecting rods to controllably move the movable die clamping plate relative to the stationary plates to open and close the die.

Abstract: A portable can compactor of the present invention includes a housing, a chamber in the housing sized to accept aluminum beverage cans for compacting. A ram is reciprocally driven in the chamber to compact cans against a front wall or anvil of the chamber. The ram front surface is sloped relative to the anvil to reduce the amount of force needed to compact a can. A feed control includes a vane which pivots between an opened and a closed position in response to movement of the ram to prevent a second can from entering the chamber before a first can exits the chamber. The compactor is operated by a momentary-on push button switch. The switch is surrounded by a guard wall which extends around a least a portion of the push-button switch. A cut-off switch is closed by a removable feed tray when the feed tray is mounted to the compactor housing. The compactor therefore cannot be operated without the feed tray mounted to the housing.

Abstract: The top and bottom ends of a pivoting lever, which is pivotable in the middle, are rotatably connected with a supporting component and a ram, respectively. A shuttle component is linked with the pivot point of the pivoting lever. The shuttle component drives the pivoting lever forcing it to pivot, and when the shuttle component reaches the midpoint of the stroke the pivoting is fully extended. The shuttle component is shuttled by way of a crank, utilizing a servomotor as the drive source. The ram drives the punching tool and is held by the frame in the way that it can readily make the up and down motion.

Abstract: An improved trash handling device for receiving trash in a trash container enclosed within a housing where the housing has a completely enclosed manually operated trash compactor for selectively compacting the trash received in the container, wherein the compactor includes a pyramid-shaped compacting plate for engaging the trash in the container, a foot lever for rotating the compacting plate downwardly from resting position into the trash container, a pneumatic spring for biasing the compacting plate to resting position, and a safety lock preventing delivery of trash to the container during a compacting cycle.

Abstract: A foot operated device for crushing beverage cans.

Abstract: A manually-operated rule bending and notching press producing a ram output mechanical advantage that is substantially than prior art manual rule bending and notching presses. This is accomplished by providing a toggle linkage that drives a crank-and-pivot mechanism. The input handle is able to travel through at least about 100 to 180 degrees of rotation as the ram moves through its full travel, however, the handle still moves through the most usable 90 degrees of rotation while the ram is moving through the most highly loaded final 1/2 to 3/4 inch of its stroke. The crank and pivot mechanism provides a substantially linear force multiplication during this last part of the press ram stroke because the crank does not pass or near the top dead center of either the input or the output linkage. Accordingly, variations in output mechanical advantage may be effected simply by altering the radii of the input and output crank pivots.

Abstract: In a mold closing unit for use in an injection molding machine for processing synthetic materials arranged on a mounting surface an electro-mechanical drive is applied in a toggle mechanism, at which the driving unit is movably held. The electro-mechanical drive converts a rotational movement of a driving unit into a linear movement for the toggle. The length of the lever and the length of the driving element is less than the distance from the mounting surface to the link points. A quill motor can be provided as a driving unit. This arrangement allows that the linear drive and the mold closing unit can be of a shorter and more compact construction.

Abstract: An articulated ram assembly in a tooling module for a stamping and forming machine is disclosed. The ram assembly has a first member that is caused to reciprocate within a passageway in a box structure by a lever eccentrically coupled to a drive shaft. The ram assembly includes a second member that is in sliding engagement with the first member and coupled thereto by means of four links. The links are pivotally attached to one of the members and are pivotally coupled through slide blocks to the other member. The links are also pivotally coupled by slide blocks to the box structure so that as the first member undergoes reciprocating motion within the box structure the second member undergoes reciprocating motion at a different rate than the first member. Therefore, the length of stroke of the second member is different than the length of stroke of the first member.

Abstract: A mold opening and closing apparatus for an electric injection molding machine which performs mold opening and closing actions by a toggle link mechanism having a first arm rotatably supported by a toggle support, a second arm pivotally joined to the first arm and to a movable platen, and an electric drive device for rotating the first arm. The apparatus includes a coil spring for urging the first arm toward a mold opening position of the first arm. The moment caused by the weight of the first and second arms in their mold clamping positions can be canceled by the virtue of the coil spring, thereby enabling the machine to exhibit improved performance of low-pressure mold clamping force.

Abstract: A method and apparatus for densifying a flexible bulk container with dry or semi-moist flowable material broadly includes a method and apparatus whereby the container and its contents are relatively gradually lifted and then relatively rapidly dropped onto a stop member such as an impact anvil, serving to densify the material contents of the container, or by alternatively compressing the contents thereof for maximum concentration of the container's contents. The apparatus broadly includes a frame which is positioned on top of a load cell or other weighing apparatus, a container supporting member such as a deck, and an impact member such as a post which serves to isolate the load cell from the impact of the container on the impact member. The filling apparatus is constructed whereby the contents of the container may be weighed during densification thereof so that the container may be rapidly and accurately filled without the need to remove it for weighing or to interrupt the densification process.

Abstract: An apparatus for assembling a recording medium having a recording disc and a center core having an adhesive coated area of attachment to the recording disc. The apparatus includes a horizontal base member, a support member rigidly fixed on the base member, and a core support table secured on the base member for carrying the center core placed thereon. The recording disc is placed on the attachment area of the center core placed on the core support table. A pushing tool is supported for vertical movement along the support member toward and away from the core support table. The pushing tool is moved downward to push the recording disc against the attachment area of the center core so as to bond the recording disc on the center core.

Abstract: Forming die assembly 18, 20 for carrying out a U-ing operation on a flat blank 58a has a forming tool 80 in one 18 of two ram assemblies 18, 20 which cooperates with a second forming tool 82 to perform the U-ing operation. During movement of the ram assemblies 18, 20 towards each other, the forming tool 80 is retracted and remains stationary during a final portion of the stroke of the ram assembly 18 in which it is carried. The forming tool is maintained in an extended position by a toggle mechanism during an initial portion of the stroke and the toggle is broken during a final portion of the stroke thereby to permit the forming tool to retract relative to the tooling assembly. On the return stroke, the forming tool is restored or shifted to its extended position by a biasing spring.

Abstract: A press apparatus is disclosed which includes a bed, a pair of opposing ram guides fixedly mounted to the bed, and a ram slidably mounted to the ram guides for linear movement relative to the bed. A pair of pull links is arranged on opposing sides of the ram, and a pull link support shaft is provided to pivotably mount the lower ends of the pull links to the bed for pivotal movement together relative to the bed. A pair of lever links is arranged on opposing sides of the ram, and a lever link support shaft is provided to pivotally mount the pair of lever links to the ram for pivotal movement together relative to the ram. A first connecting shaft is provided to pivotally mount the upper end of each of the pull links to a respective one of the lever links. A reciprocating cylinder device is operatively connected to the lever links in order to selectively force the lever links to pivot together in first and second rotational directions relative to the ram when operated in first and second selected manners.

Abstract: An upsetting press for swaging wire segments into balls or the like. The press includes a fixed matrix, a stamp holder provided for a stamp and mounted on a machine frame so as to be displaceable in the stamping direction, a cam drive mechanism for the stamp holder, and a gripper device provided for the wire segments. The cam drive mechanism is a double cam that is rotatably mounted in the machine frame. An angle lever is pivotably mounted in the machine frame. Follower rollers are carried by the angle lever and run on the double cam. A presser carriage is provided for the stamp holder and is guided in the machine frame in such a way that it can move back and forth. A knee lever is provided that has two arms, one of which is connected to the machine frame and the other of which is connected to the presser carriage. A connecting rod operatively interconnects the angle lever with the knee lever.

Abstract: A press for performing a work operation on a workpiece including a yoke defining a central bore, a ram mounted for reciprocal movement in the bore and carrying a fabricating tool on one end of the ram, an electric motor secured to an end wall of the yoke and having an output shaft passing through the end wall of the yoke, a ball screw driven by the output shaft of the motor and positioned in the bore of the yoke, a ball nut mounted in the bore on the ball screw, and a force multiplying mechanism interconnecting the ball nut and the ram and operative to move the ram to a preparatory position and thereafter multiply the force applied to the ram to facilitate the performance of the work operation.

Abstract: A manual tool, drivable by a rotary motor, for treating work pieces by pressure, such as crimping contact terminals on electrical conductors, comprises in a tool body, on which a recess for the work piece is provided, a slidably mounted stamp member and a force transforming mechanism which has an input shaft drivable by the motor in rotary motion, and an output member for driving said stamp member through a tuggle linkage in a reciprocating motion toward and away from said recess.

Abstract: A press for performing a work operation on a workpiece including a yoke defining a central bore, a ram mounted for reciprocal movement in the bore and carrying a fabricating tool on one end of the ram, an air cylinder secured to an end wall of the yoke and having a piston rod passing through the end wall of the yoke into the bore, and a force multiplying mechanism interconnecting the free end of the piston rod and the ram and operative to move the ram to a working position and thereafter multiply the force applied to the ram to facilitate the performance of the work operation.

Abstract: A press apparatus mechanical dwell linkage comprises a pair of cam plates, one of which is fixed and the other pivotable, positioned in side-by-side parallel relationship. An operating arm is connected to the moving die in a press apparatus and simultaneously engages cam slots in each cam plate to transmit cam slot curvature and direction in the fixed cam to pivoting motion of the pivotable cam. A workpiece manipulating link oscillates with said pivotable cam to transversely change the position of a workpiece between the dies. The cam slots cooperate to introduce a dwell period in the work manipulating link at the start of, and end of, its workpiece-changing motion.

Abstract: This invention relates to a mechanical press comprising a shaft 1 coupled to a drive, which shaft 1 is supported in a yoke 2 at its end opposite to the drive, and a connecting rod 9, the lower end of which is rotatably connected with a slide 11 which is guided and movable relative to the press table 13. The two connecting rod ends 8, 10 can be rotatably connected with the slide 11 or journal 3, respectively, via cross-pieces or universal joints, which in turn is supported in the front end of the shaft 1, the rotation axis 4 of which extending in parallel to the rotation axis 5 of the shaft 1, however offset in relation thereto, and it being possible that the yoke 2 can be swivelled about an axis extending in parallel to the press table 13.

Abstract: The mechanical press, particularly a toggle press, comprises a hydraulic member connected between the force transmitting and force receiving components, such as a toggle joint, carriage, anvil, and platen. The anvil is mounted on a hydraulic member which is located in a hydraulic chamber. The hydraulic member acts as a press cushion which is continuously connected with a large volume fluid reservoir which is maintained constantly under a gas pressure. The hydraulic member has a maximum filling volume which is at most 1% of the volume of the fluid reservoir.

Abstract: Mechanism for effecting pressure engagement between two roll fuser members used for fusing toner images to copy substrates. The mechanism is characterized by simplicity of design and serviceability. To this end, one of two roll fuser members is supported on bearing surfaces such that it is lifted or raised upwardly through engagement with the other fuser member as it is moved upwardly. Upward movement of the last mentioned roll is effected by pair of lever arms which serve as the support for that roll. Each lever arm is operatively attached to an overcenter toggle structure which is actuatable either by rotary or linear motion of an actuator mechanism.An adjustment device is provided for varying the load applied to the rolls.

Abstract: A manually operated press for crushing aluminum cans in the specific and exact manner of end to end while maintaining their original diameter, having a crushing chamber enclosed on its two sides by parallel walls of a frame, furthermore enclosed by a fixed stationary end, while the opposite end of crushing chamber is enclosed by a manually operated crushing member which is movable within sides of frame toward and away from fixed stationary end of crushing chamber with the bottom of crushing chamber enclosed by a base which crushing member guide slides upon, leaving top of crushing chamber open in which an aluminum can is placed horizontally in crushing chamber with the sides of the aluminum can parallel to the sides of the frame whereby the crushing member by means of mechanical advantage is advanced toward fixed stationary end of the crushing chamber thereby crushing the aluminum can by forcing one end toward its opposite end; while the walls of the crushing chamber, because of their close tolerance to the a

Abstract: A sealing apparatus for joining container parts of a plastic-lightweight al foil laminate by heat and pressure applied to the laminates when the respective plastic layers are pressed into contact uses a toggle linkage and a yieldable buffer, with a hydraulic actuator to drive the toggle linkage to close a pair of sealing heads together. The toggle linkage permits rapid build-up of pressure to a value predetermined by the construction of the buffer, after which the buffer yields to hold the sealing pressure. The duration of the build-up to sealing pressure comprises no more than 20% of the time interval between initiation of pressure build-up and the start of pressure drop-off at the end of the sealing process.

Abstract: A scrap metal compacting apparatus wherein scrap is compressed between a lower jaw formed on the base of the machine and an upper jaw formed on a lid pivotally mounted on the base. A lever arm connects the lid to a trolley which is moved along longitudinally rails disposed in a channel formed in the base to pivot the upper jaw away from the lower jaw and to pivot the upper jaw toward the lower jaw.

Abstract: Disclosed is an apparatus for holding a stack of papers such as paper money in a compressed state before and during the winding of a binder tape around the stack to form a bound paper bundle. The apparatus comprises first and second bases or platforms longitudinally aligned to each other with a gap interposed therebetween. Each of the platforms is in the upper surface thereof formed with an arcuately concaved longitudinal recess which is adapted to be covered by resilient plate for receiving thereon the stack of papers to be bound. Disposed above the first and second platforms is a vertically movable pressing pad plate which has an arcuately convexed lower surface. The stack of papers placed on the resilient plate can thus be clamped between the platforms and the lowered pressing pad and held in the arcuately compressed state.

Abstract: A sealing apparatus for joining container parts of a plastic-lightweight metal foil laminate by heat and pressure applied to the laminates when the respective plastic layers are pressed into contact uses a toggle linkage and a yieldable buffer, with a hydraulic actuator to drive the toggle linkage to close a pair of sealing heads together. The toggle linkage permits build-up of pressure to a value predetermined by the construction of the buffer, after which the buffer yields to hold the sealing pressure. The duration of the build-up to sealing pressure comprises no more than 20% of the time interval between initiation of pressure build-up and the start of pressure drop-off at the end of the sealing process.

Abstract: The crank press comprises a frame with a bed for accommodating the workpiece and with guides mounted on said frame perpendicularly to the bed surface, said guides supporting a slide which carries the working tool and being connected with the crankshaft by a kinematic chain comprising an engaging mechanism for starting the slide on its working stroke, said mechanism being made in the form of a power cylinder.