Abstract: In a method for the bending of workpieces by swivel bending jaws, the bent-off part is to assume a predetermined bending angle with respect to the workpiece, for this purpose, in a first bending operation, at least one corresponding leg is to be bent off from the workpiece by means of the swivel bending jaws. Then, the swivel bending jaws are released from the leg and a springback of the leg or the actual bending angle is determined by direct measurements and compared with a set bending angle. Subsequently, an agreement is established between set bending angle and actual bending angle by a renewed bending operation, by a bending-over.

Abstract: An orientable bending assembly of a type capable of being temporarily retracted below the upper edge of a work platform (15) of a bending-shaping machine for sections is disclosed. The bending assembly is provided with clockwise and anticlockwise rotation of a bending pin (18) and contrast roll (12). A bending, e.g., disk (11) cooperates with and is supported by an orientable slide block (14) pivoted on an orientation pivot (16) lying in the neighborhood of a plane comprising the axis of the contrast roll (12), this plane being substantially parallel to the axis of the section or sections being bent and shaped.

Abstract: A bending machine comprises a support to which first and second spaced cooperating bending devices are displaceably mounted. Each of the bending devices have first and second spaced cooperating bending components and the components of the first and second bending devices define a first axis extending between the bending devices and further define second and third axes extending generally transverse to the first axis and about which a length to be bent may pivot and each of the second and third axes are disposed between the components of one of the bending devices. A drive mechanism is operably associated with at least one of the components of each of the bending devices for causing displacement thereof. A guide system is operably associated with the support and with each of the bending devices so that displacement of the bending components by the drive system causes the bending components to move relative to the first axis and to engage the length to be bent extending between the devices.

Abstract: A portable tool for bending elongated mine roof bolts in situ including a stationary support portion for holding a part of a roof bolt, a movable support portion for holding another part of the roof bolt, a power cylinder and piston for moving the movable support portion in an arc to effect bending one end of the bolt, to permit insertion thereof into a mine roof opening. The power cylinder and piston being activated to return the movable support portion to its initial position, thereby straightening the bolt to permit full insertion of the bolt into the mine roof opening.

Abstract: A bending machine comprises a support to which first and second spaced cooperating bending devices are displaceably mounted. Each of the bending devices comprises first and second spaced cooperating bending components and the components of the first and second bending devices define a first axis extending between the bending devices and further define second and third axes extending generally transverse to the first axis and about which a length to be bent may pivot and each of the second and third axes are disposed between the components of one of the bending devices. A drive mechanism is operably associated with at least one of the components of each of the bending devices for causing displacement thereof. A guide system is operably associated with the support and with each of the bending devices so that displacement of the bending components by the drive system causes the bending components to move relative to the first axis and to engage the length to be bent extending between the devices.

Abstract: Reversible fuel assembly grid tab repair tool having a tab bending member for remotely reforming fuel assembly grid tabs, wherein the tool has means for fine alignment of the tab bending member with the grid tab to be reformed. The grid tabs may be formed on the top and bottom edges of a grid strap which wraps a plurality of fuel rods disposed in the fuel assembly. The repair tool comprises a generally L-shaped frame having a vertical first leg and a horizontal second leg. Extending from the terminal end of the second leg is an alignment blade capable of being interposed between two fuel rods adjacent each side of the grid tab to be reformed. Attached to the top surface of the second leg at the terminus thereof is an anvil block having an anvil surface for bending the grid tab thereagainst when the grid tab is interposed between the anvil surface and the tab bending member.

Abstract: A method of and tools for forming sewing machine binder strip folders for folding a cloth binder strip laterally as it is fed to the sewing machine needle for stitching the folded binder strip to fabric which is fed past the needle with the folded strip.

Abstract: A bending device has a slot defined by facing side walls which taper from a reference plane in a direction to widen the slot proportionately with the slot depth to form two opposed facing bending edges. The angle the side walls taper from the reference plane is significant wherein each angle is within a range defined by a minimum value to assure the edges penetrate and sever the tab at its extremities and a maximum value to insure the tab is not completely severed during bending.

Abstract: The invention relates to a bending apparatus for bending a rod-shaped or ribbon-shaped material, comprising a bending station disposed in a work plane and including at least one bending core or pair of bending cores mounted for displacement perpendicular to the work plane, and at least one rotary body carrying a bending finger mounted for rotation about the bending core and for displacement perpendicular to the work plane. With known bending apparatus it is scarcely possible to vary the bending mode, or the bending radius, respectively, without time-consuming adaptation of the bending station. Such adaptation may be required several times for a single workpiece. In accordance with the invention, the bending core or pair of bending cores is mounted, together with at least one further bending core or pair of bending cores for selectively employ in a bending operation, in a turret head mounted above the work plane for rotation at least to several operating positions.

Abstract: Tool and method for bending of shaping the tips of angioplasty guide wires. The tool has two relatively rigid body sections joined together by a relatively flexible hinge, with a flexible tube extending across the hinge for holding the tip of the wire to be bent. The body sections are folded together about the hinge to bend the wire, and the flexible tube tends to form a kink in the wire which helps the wire to retain the shape to which it is bent. Stops limit the movement of the body sections and prevent overbending of the wire.

Abstract: A tube bender has two readily connectable and detachable members. A base member has a block with two parallel grooves. The tube groove is formed in an arc having the radius of the desired bend and a cross-section with a radius corresponding to the tube diameter. The second groove has straight sides and an arc similar to the tube groove. Pivotally mounted on the base member adjacent the block is a retainer. In its first position a radius therein clamps the tube in the tube groove. In its second position, a fork fits over the conventional ferrule of a connector fitting. The block is notched opposite the retainer to receive the outer end of the fork and a connector nut. The forming member has a crescent-shaped end of a radius complementary to the second groove so that the crescent may fit snugly in the second groove. A forming block on the forming member engages the outside of the tube and causes it to conform to the shape of the groove. For manual operation, the two members have diverging handles.

Abstract: A slit fin heat exchanger is formed by wrapping slit fin tubing into a flat coil having two spaced rows of tubing. The flat coil is located on mandrels which are rotatable about spaced parallel axes with the mandrels and axes initially being in the same plane. The mandrels are rotated about their axes in opposite directions which shifts the plane in which the coil is located. The shifting of the plane of the coil moves a portion of a first row of the coil into contact with a planar portion of a platen and the second row of the coil into a nesting relationship with the portion of the first row which is in contact with the planar portion of the platen. Continued rotation of the mandrels causes folding of the portions of the coil which extends the area of nesting. The folding takes place through up to 120.degree. and the ends of the first row of the coil contacts a portion of the platen causing the formation of a knob at the end of each coil.

Abstract: A hand operated bending tool for forming a clean bend in a venetian blind slat includes a generally U-shaped upward-opening bottom member having a width which exceeds the width of the slat to be bent and having a length proportioned to receive one leg of a slat therein. The bottom member has a low friction curved portion leading into the interior of the member, permitting the slat to roll thereover during the bending operation. An elastomer portion in the bottom member, adjacent the forward end, defines a resilient slat-gripping surface to engage the slat legs and prevent sliding movement of the leg in the channel member during bending. A U-shaped, downwardly-opening top member is received within the bottom member, the top member having a remote end pivotally attached to the bottom member for movement between a raised position to a lowered position in which the upper top member is substantially nested within the bottom member. A slat leg therein is pressed against the gripping surface.

Abstract: A wire or strip bending machine has bending tools (1,2), each of which can act as an active tool or mandrel, mounted on an arm (3) which is slidable in a slot (11) in a rotatable disc (10). The disc is rotatable via gearing (13,14) to rotate one of the tools about the other, to bend material between the tools.

Abstract: A device for forming orthodontic arches from straight wire blanks comprises a die having a cylindrical surface with multiple wire-receiving grooves situated in planes perpendicular to the die axis. A clamp temporarily applies a clamping force to the wire blank, thereby firmly holding a portion of the wire blank in the groove of the die. The bender has two sweep arms, each pivoted on the die axis. A slide is provided on each of the sweep arms, and is constrained for movement toward and away from the die axis. Each slide carries a circular cylindrical roller mounted in bearings on the slide, for rotation about a roller axis parallel to the die axis. An adjustable toggle mechanism on each arm temporarily locks its roller in a position such that the outer roller surface presses the wire blank into one of the wire-receiving grooves before the arm begins to sweep about the die axis, and throughout the sweeping movement of the arm.

Abstract: For bending the edge of a thick sheet of metal a tool comprising a yoke with a long and a short leg with plate-engaging bars in the opening between the legs is used. The tool is placed on a sheet so as to straddle the edge to be bent with one bar on each side of the sheet. An extensible member, for example a hydraulic cylinder, bears against the sheet to tilt the yoke so that the bars are pressed against the sheet to bend it. The tool may be provided with transport wheels and drive equipment for automatically moving the tool on the sheet.

Abstract: The invention relates to a machine for folding sheet metal blanks. For folding a sheet metal blank, there is provided at least one folding member having a folding surface and being driven by an eccenter to perform a reciprocating beat movement. The sheet metal blank is drawn into the gap between the folding member and a stationary anvil for folding. The folding member is pivotally mounted in a holder for ease of operation and to obtain a neat folding. So the folding member is adapted to adjust to the instantaneous resistance of deformation of the sheet metal blank. If a sheet metal blank is to be folded twice, a corresponding second folding member, which is also pivotally mounted in a holder, is disposed downstream of the first folding member.

Abstract: A hand seaming tool for use during original installation or re-roofing of roof panels of a building. A pair of main body elements, a pair of interconnected intermediate body elements, handle structure, limit structure, and an anvil head and forming bar all cooperate to permit an operator and user of the device to perform double seaming of the edge flanges of adjacent roof panels. Preferably, such operation occurs during initial starting of the double seaming and/or the final completion of such double seaming operation. A motorized roof seamer is normally used for the intermediate portion between the beginning and ending double seamed areas.

Abstract: An apparatus is provided which forms flanges on sheet metal for ventilation duct walling. The apparatus comprises a die support which contains a pressure die, a beam punch carrier mounted in low-friction manner on the die support, and a forming roller pivotally housed in a recess of the die support. Hydraulic drives are supported, each between the die support on the one hand and the beam punch carrier or the forming roller on the other hand, and these produce the movements necessary for edge folding and roll forming. The forces which arise are taken up directly at their point of origin by the mutually moving parts themselves.

Abstract: A rotating die system for cold forming of sheet metal wherein a male die rotates relative to both an hydraulically supported resilient diaphragm backing the sheet metal blank and the driving force on the male die. The male die is pivotly connected to both a draw ring and the transmitted driving force. A sheet of metal to be formed is held in place on the upper surface of a draw ring die over a forming aperture. The male die is caused to rotate within the aperture against the sheet metal to accomplish the desired forming.

Abstract: The invention provides an arrangement for forming an elbow in a length of pipe comprising two internal die pins each mounted for rotation, as limbs of cranked assemblies, about the same axis, the internal die pins being angled with respect to the axis of rotation and meeting each other in surfaces lying in a plane normal to the axis of rotation, the surfaces being intersected by said axis of rotation; means for contra-rotating the cranked assemblies from a position at which the die pins are co-axial to a position at which they are aligned at a pre-determined angle with respect to each other.

Abstract: There is disclosed point-of-use apparatus that is actuated by a pair of socket wrench handles. This device allows one man working in a confined area, such as a cabinet or junction box, to bend tubing, pipe or cable; pull cable or rope or cut soft cable or rope on a job location without the assistance of a co-worker and providing a high degree of accuracy. This device provides apparatus for bending pipe or cable or may be used for pulling cable. This apparatus includes end plates that are spaced a determined distance from each other by means of connecting rods. The rods may also carry bushings for bending cable, pipe, tubing or thin walled conduit to a specific diameter. The second apparatus is designed to cut soft cable, tubing, rope and the like and is also actuated by the same or a like socket wrench handle.

Abstract: A bending mandrel arrangement for use in a machine for the simultaneous bending of a plurality of parallel reinforcing rods for concrete comprises a work support beam on which the rods rest, a trackrail mounted on said work support and having an upper open grooveway and a vertical wall, a plurality of mandrels having arms which engage in said trackway and abut said vertical wall so that the mandrel arms can be simultaneously urged into clamping engagement with said trackrail, and a bending bar which is movable around said mandrel arms to bend said rods.

Abstract: A hemming apparatus comprising a body; a bottom form fixed to the body; a top-form ram provided above the bottom form and vertically movable against the bottom form; a bracket set up on the body at the side of the bottom form; a yoke rotatably pivoted to the bracket and pressable by the top-form ram; and a bending blade fixed to a tip end of the yoke and integrally formed therein with a preliminary bending blade surface for preliminarily bending a work and a primary bending blade surface for bending the preliminarily bent work to a finished state. By this structure, the hemming apparatus has novel features of simplifying the apparatus, preventing displacement of the work during bending-formation, and preventing an outer plate from being wrinkled, while the advantage of a conventional hemming apparatus of continuously carrying out preliminary and primary bending operations by lowering movement of a top-form ram is retained.

Abstract: A bending and forming device is disclosed having an operating head and its holder features a holder which is a multi part structure including a saddle for seating the head and a releasably connected gib, a limited portion of which is adapted to releasably bear on and hold the head to and for a rocking or rotative movement thereof on its seat. The head is preferably a cylindrical body having a groove the length of its outer peripheral surface, the bounding walls of which groove determine the operation to which the head may be applied. The retention device is connected to the saddle so as to enable an easy adjustment of its position to accommodate variation in the dimension of the operating head or wear of the related parts. In preferred embodiments the saddle affords a concentrated load bearing surface for the head provided by relatively narrow, adjacent and relatively spaced, longitudinally extended, strip-like bearings.

Abstract: A forming machine to form a sheet of metal to an "S" bend having clamps to clamp the sheet metal, one of the clamps having an anvil about which the sheet metal is folded by a rotatable forming bar to form a first channel and partially form a second channel in the sheet metal after which the rotatable bar is moved clear and a nose on a further former further folds the second channel facing in the opposite direction to the first channel.

Abstract: A bending machine for reinforcement mesh wires wherein the bending-rod which bends the wires around mandrels is supported by arms extending beneath the rest upon which the mesh is located in use. The bending-beam which carries the rod is driven in an arcuate path to perform the bending operation by means of cranks of adjustable eccentricity which co-act with a web member to which the beam is adjustably coupled. The components are so arranged that an imaginary line intersecting the crank axes is parallel to a similar line intersecting the bearings whereby the cranks are coupled to the web member.

Abstract: For bending wiring conduits projecting up from the floor of a building under construction, the present apparatus has a padded block providing a lower abutment, a grooved block providing an upper abutment located above and behind the lower abutment, and a jaw pivotally movable from a retracted position on the opposite side of the conduits from the lower and upper abutments to an extended position toward the upper abutment to force the conduits against the padded block for forming lower bends in the conduits. The jaw has a grooved convex face which engages the conduits to form upper bends of the opposite curvature in the conduits between the lower and upper abutments. The padded block is adjustable to determine the amount the conduits are bent. The grooves in the convex face of the jaw are laterally spaced to spread the conduits apart laterally from their spacing at the floor. A manually pivoted handle actuates the jaw through a mechanical linkage.

Abstract: A web bending fixture to bend lithographic plates used in web offset printing and production. Precise bends are created by a precision machine tool fixture. The fixture utilizes continuously supported eccentric camming members, one on each end of the fixture, each supported by a plurality of split bearings within which the camming members rotate. After the lithographic plate is precisely aligned with unique registration means and immobilized, the camming members, are moved into position and, rotating within the bearings, form the leading and trailing edges of the plate around precisely positioned and fixed anvils.

Abstract: A hemming apparatus comprising a lower body, an upper body vertically movable with respect to the lower body, a main hemming means connected by links to the upper body, a shifting cam provided on the main hemming means so as to shift the main hemming means laterally in accordance with the downward movement of the upper body, a guide provided on the lower body and adapted to be engageable with the shifting cam, and a bending blade attached to the main hemming means and consisting of integrally formed blade members one of which is used for a preliminary bending of a work and the other of which is used for a primary bending of the work.

Abstract: Apparatus for bending valve stems of inner tubes used primarily in truck tires which facilitates locating the area of bending contemporeous with readily controlling the bend angle of the stems. An apertured clevis is pivotally mounted on a housing that is grooved to receive a valve stem, with a cylinder and piston connected to the clevis for actuating same with respect to the housing to effect a bending of the valve stem. The housing contains a cylinder and piston for actuating rack and pinion members with suitable indicia provided on the pinion for imprinting upon the valve stem. The cylinder and piston members for the bender and the marker are controlled by an air lock safety system.

Abstract: An expansion joint for metallic foil strip heaters encasing resistive heating elements comprised of a bend formed in the metallic foil strips. The expansion joint is formed by use of a tool for passing a roller in the tool handle over a rigid forming support affixed to the tool bottom forming plate with the metallic foil strip heater placed between the roller and the forming support. The tool is then removed and a flexible metal support hose is affixed to the object to be heated with the bend in the metallic foil strips placed over this support hose. The bend is then affixed to the object to be heated on either side of the support hose.

Abstract: A sheet metal bending tool with first and second former members, one rotatable on a first axis, the former members being movable toward and away from each other on another axis normal to the first axis, the formers having opposed clamping faces, the rotatable former member having two clamping faces angularly related to each other by an angle equal to the angle of rotation during bending, the clamping face of the second former being toothed.

Abstract: An apparatus is provided for shaping metal bars, particularly for forming eyes in spring leaves. The forming machine includes a table supported on a main frame and rotatable about an axis, a mandrel extending from the table about the axis, a positionable back stop member on the frame adapted to be operatively engaged with the work piece which is to be formed about the mandrel, a jaw assembly actuable to clamp the workpiece against the mandrel, and means to rotate the table to form the workpiece about the mandrel.

Abstract: A tool for attaching a support member formed with a hook member and a bendable tab member to a support post formed with a plurality of slots is disclosed. The tool is provided with a handle portion having an arcuate bending finger at one end and which is pivotally connected to a reaction finger having planar bearing surfaces. In use the reaction finger is placed in the slot in which the hook member is received and then the bending finger is inserted into the slot in which the tab member is received. Force is then applied to the handle portion which is applied to the tab member through the bending finger and which reacts through the reaction finger.

Abstract: A small size, portable bender operable from a domestically available A.C. source of the order of 100V having the drive shaft turned through the intermediary of a clutch from a motor to perform a bending operation. Bending angle control means is provided to regulate the clutch to discontinue the bending operation at a desired angle.

Abstract: A straightener for bent and kinking wire rope, including log chokers and like cables, has a base member divided into a pair of mounting surfaces disposed at an acute angle with respect to one another. On one of the mounting surfaces of the base member is arranged two laterally spaced, longitudinally extending cable support members provided with opposed recesses for receiving a length of cable, with the bent portion of the cable being placed between the support members. A lever actuated by a power assembly mounted on the other of the mounting surfaces of the base member swings between the support members to straighten the bent portion of the cable, and the like.

Abstract: The illustrated apparatus forms a flange at the front or rear end of a bicycle fender, the end of the fender being generally arcuate as viewed in side elevation. The fender is supported on a shoe member having an arcuate end face with a portion of the fender projecting beyond such end face. A forming member of arcuate curvature is mounted for arcuate movement on an axis concentric with the common axis of curvature of the end of the support block and the arcuate forming member. The forming member has an inverted U-shaped forming edge which passes arcuately downwardly across the projecting end of the fender to cooperate with the end face of the support block to flange the projecting end of the fender downwardly.

Abstract: A device for slipping a tube on the mandrel of a bending machine includes a support upon which a pair of slides are slidably mounted for movement in a direction parallel to the axis of the mandrel. A double arm lever is pivotally mounted to each slide, about axes parallel to the axis of the mandrel and a cylinder is mounted between the first ends of the levers. Gripping jaws are removably mounted to holders rotatably connected to the other ends of the levers, the gripping jaws being adapted to clamp a tube to be bent therebetween on opposite sides of the mandrel. A further cylinder is provided for moving the slides in a direction parallel to the axis of the mandrel.

Abstract: A web bending fixture to bend lithographic plates used in web offset printing and production. Precise bends are created by a precision machine tool fixture. The fixture utilizes continuously supported eccentric camming members, one on each end of the fixture, each supported by a plurality of split bearings within which the camming members rotate. After the lithographic plate is precisely aligned with unique registration means and immobilized, the camming members, are moved into position and, rotating within the bearings, form the leading and trailing edges of the plate around precisely positioned and fixed anvils.