Abstract: A clamping device for conveyor belts has a pair of crossbars disposed on opposite sides of the conveyor belt and clamping bars each disposed between a respective crossbar and the conveyor belt. The device is mounted through the clamping bars and a hydraulic unit such as deformable hoses or an array of piston-and-cylinder units is braced between one of the clamping bars and the respective crossbar.

Abstract: A hot press capable of minimizing a displacement of one substrate from another in multilayer printed circuit boards each constituted by a plurality of substrates having wiring pattern groups printed thereon which are pressed together by applying pressure into a multilayer printed circuit board. The end is attained by minimizing a variation in thickness from a central portion of the board to a peripheral portion thereof. The hot press includes plate thickness adjusting devices each interposed between each bolster and each heat insulating member to compress and deform the heat insulating members beforehand.

Abstract: A can crusher includes a base, a handle pivoted to the base, crusher plates pivoted to the base and handle, and guide means to maintain the plates parallel. The crusher is made of slightly flexible plastics material, is assembled by snapping it together without separate fasteners, and is hollowed out for lightness and strengthened and rigidified with strategically placed ribs.

Abstract: A belt press has a plurality of upper and a plurality of lower traverses respectively having lower and upper traverse faces, upper and lower press platens carried on and between these traverses and having respective upper and lower platen faces respectively confronting the lower and upper traverse faces, and mechanically actuated bolts engaged between the traverses for displacing them toward each other and thereby pressing the platens against a belt engaged between them. The belt press also has at least one bend-compensating element having a pair of nonparallel upper and lower surfaces and engaged between one of the platen faces and the confronting traverse faces, and a hydraulic force transmitter engaged between this bend-compensating element and one of the respective press and platen faces.

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: A belt press comprises a plurality of upper and a plurality of lower traverses respectively having lower and upper traverse faces, upper and lower press platens carried on and between these traverses and having respective upper and lower platen faces respectively confronting the lower and upper traverse faces, and a hydraulic actuator for displacing these traverses toward each other and thereby pressing the platens against a belt engaged therebetween. The hydraulic actuator is engaged between one of the platen faces and the confronting traverse face and has a pressure plate bearing on the one platen face, a plurality of diametrally compressible but circumferentially unstretchable hydraulic hoses forming at least one substantially closed chamber and bearing in one direction in surface contact on the pressure plate and in the opposite direction in surface contact at least indirectly on the confronting traverse face, and a system for pressurizing this chamber.

Abstract: A hydraulic press such as a press brake is disclosed having a pair of long movable and fixed tools which are always kept in parallel with each other by detecting the obliquities of the movable and fixed tools and controlling the fluid delivery to hydraulic motors which drive the movable tool. Each hydraulic motor is controlled by a valve which is actuated by a rocking cam arrangement. The limit of movement of the movable tool toward the fixed tool also can be easily adjusted by adjusting the rocking cam arrangement.

Abstract: An expandable bag is supported on a base and is associated with first and second platen means. The first platen is movable in a pressing operation relative to the second platen by expansion and contraction of the bag. The second platen is movable relative to the first platen in a plane parallel with the pressing surfaces of the platen for loading articles onto and unloading them from the first platen. The second platen has backup support for pressing functions by the frame of the press. The second platen is carried on a wheeled support for its movement in a plane parallel with the pressing surfaces and is associated with shock absorbers at the limits of its travel. Controls are provided for sequence functioning of the expandable bag and the second platen. The press has an opening at the top adjacent the front which is opened and closed by movement of the second platen.

Abstract: A gap-framed type press has a horizontal bed which holds a lower die that cooperates with an upper die mounted on a vertically reciprocally movable ram to perform a metal-working operation therebetween. Hydraulic cylinders are operatively engaged with the ram for moving the die members into and out of engagement. The ram is movably mounted on a pair of spaced vertical side plates which are bolted to the press bed. The bed is supported on a pair of side frame members by a pair of spaced spherical bearings. The side frame members extend parallel with and closely adjacent to the ram-carrying side plates and are connected to the side plates by a sliding connection. The elastic bending and deformation forces which are applied to the press frame during each operation are transmitted between the side frame members and side plates through their sliding connection and between the bed and side frame members by the spherical bearings.

Abstract: An overload safety device for a hydraulic press of the type in which a parallel linkage is mounted on the moveable beam to ensure normal accurate alignment if constituted by an operating rod mounted preferably on the transverse connecting rod of the parallel linkage in order to operate limit switches in accordance with longitudinal dimension changes due to compressive or tensile forces in this connecting rod arising from asymmetrical load. The operating rod can be arcuate and mounted at each end on the connecting rod or can be straight and mounted at one end only. Flexing of the arcuate rod or relative movement of the free end of the straight rod can be magnified by a mechanical linkage with an arm operating the limit switches.

Abstract: Method for optimally stabilizing the winding of transformers and chokes, which includes pressing at least one winding in a drying oven at constant pressure during the entire drying process, and subjecting each winding to its required pressure if more than one winding is to be pressed simultaneously.

Abstract: Hydraulic mechanism controlling approach and separation of relatively movable platens of a press is provided to maintain them in parallel relation. If one of two columns of the press advances relative to the other, the advanced column is slowed by restricting fluid flow return from its cylinder. Diagonally opposite cylinders in a four-column press are thus controlled.

Abstract: This bending press or similar machine tool comprising a top beam and a bottom beam disposed on either side of a working bed and provided with matching tools, respectively, one beam bearing with its ends on the fixed frame structure of the machine while the other is movable and actuated by driving members located at its ends; one beam comprises two sections one of which is supported or actuated at either end while the other section is connected to the first section by means of one or two common studs disposed symmetrically in relation to the transverse median place of the beam and relatively close to said plane; one section of the compound beam comprises a pair of panels disposed on either side of a panel constituting the other section.

Abstract: A device for compacting trash and the like comprises a bin having an open top through which the material to be compacted can be passed and walls which define a volume into which the material is deposited. A horizontally disposed, rectangular pressure plate for compacting the material is horizontally driven from a zone horizontally removed from the open top into a region above the volume. The pressure plate is vertically driven between the region and the volume to compact the material in the bin and is returned to the region. The plate is vertically driven by first and second vertical pistons that are respectively positioned to drivingly engage opposite, straight, parallel edges of the pressure plate. The pistons are separately driven by fluid pressure until the fluid pressure acting on one of the pistons reaches a predetermined value.

Abstract: Apparatus is provided for enlarging metal rings using a hydraulic press having a piston and anvil including a pair of generally parallel arms adapted to fit between the piston and anvil and be acted on intermediate their ends. The arms are maintained in a parallel relationship by a linkage arrangement. A pair of opposed work surfaces at one end of said parallel arms outside the press are adapted to receive a ring to be enlarged. A compensating hydraulic cylinder between the other ends of said parallel arms act between said ends to maintain said arms in parallel relationship with minimum pressure on said parallel linkage.

Abstract: A downstroke baler comprising a compaction chamber through which a platen is reciprocated vertically by spaced pressure actuated cylinders secured to opposite ends of the platen. The lower end of an actuating rod rests upon a support plate secured to the frame of the baler and a bracket secured to the frame of the baler is positioned adjacent the upper end of the actuating rod to restrain the actuating rod against vertical movement. A sleeve is secured to the platen and slides along the actuating rod such that the actuating rod is maintained perpendicular to the face of the platen. The upper end of the actuating rod is connected through an actuating link to valves secured to the frame of the baler. The valves control a hydraulic circuit connected to the cylinders which raise and lower the platen such that movement of the platen from a horizontal attitude causes the actuating rod to be moved from a vertical attitude thereby changing flow of fluid to the cylinders to return the platen to a horizontal attitude.

Abstract: An automatic nailing machine for fabricating wooden pallets. The device has a hammer pin support bar vertically movable within a frame and horizontally aligned by a first horizontal alignment bar mounted on the frame. A nail feed and support bar is mounted below the hammer pin support bar, is moved upwardly when the hammer pin support bar is moved to its uppermost position, moves downwardly with said hammer pin support bar when said hammer pin support bar begins its downward travel and then remains stationary as the hammer pin support bar continues its downward movement. A plurality of hammer pins are mounted on the hammer pin support bar and cooperate with a plurality of nail holding devices mounted on the nail feed and support bar. The nail feed and support bar is horizontally aligned by a bar affixed to the frame and lined to the nail feed and support bar.

Abstract: A method and apparatus for the baling of solid waste. The system includes opposed compaction platens which operate to compress waste material within a cavity. The platens also act to eject the bale from the cavity for tying and easy handling. The system further provides for the introduction of more than one charge of material to form a single bale. A hydraulic system is employed within the baling system which allows the platens to cooperate together to present a compressed bale to the tying area under compression and hooks are also employed which both weigh the compacted bale and provide easy forklift removal thereof.

Abstract: The subject invention involves apparatus for simultaneously actuating a plurality of piston and cylinder assemblies which are used to drive the movable platen of a cutting press. The instant press has a platen driven by four piston and cylinder assemblies, each assembly being connected to a source of pressurized fluid through an appropriate spool valve. The spool valves are actuated simultaneously by the movement of a pair of actuator bars which are interconnected for coordinated movement through bell cranks to a single piston and cylinder drive means.

Abstract: The press includes a base structure carrying a press platen and an upper floating head carrying a press platen, the floating head being movable toward and away from the base. A fluid-actuated cylinder is provided at each end of the press to raise and lower the head. A load transfer assembly interconnects opposite ends of the press and includes a transfer bar pivotally connected at opposite ends to bellcranks at opposite ends of the base. Rods at opposite ends of the press connect between the bellcranks and head. When the press is subjected to asymmetrical loadings, the load transfer apparatus transfers a portion of the force applied to the head by the cylinder at one end of the press to the head at the opposite end of the press.