Abstract: A manufacturing method of a sub-muffler outer cylinder is provided. The manufacturing method includes pushing one push roll toward two receive rolls, and then bending a plate-shape workpiece to form the sub-muffler outer cylinder made of a cylindrical-shaped body. A push-in amount in a part of the workpiece corresponding to a corner part of the cylindrical-shaped body is made larger than a push-in amount in a part of the workpiece corresponding to a side part of the cylindrical-shaped body to form the cylindrical-shaped body having a polygonal cross-sectional shape.

Abstract: An apparatus forms a sheet into a beam having four exterior walls and a common center leg extending between an opposing two of the walls. The apparatus includes a roll former forming the sheet into the beam cross section, a welding station with top and bottom laser welders, and a weld box fixture having inwardly-biased external mandrels (biased by actuators) and outwardly-biased internal split mandrels (biased by springs) that interact to hold a desired shape of the beam in the weld fixture, and also includes a sweeping unit and cutoff device. By this arrangement, the internal and external mandrels, in combination with a bias of the actuators and springs, control a shape of the beam by flexure and movement of material of the sheet when in the weld box fixture during a welding process of the welder.

Abstract: A roll former for forming a sheet into a continuous multi-tubular reinforcement beam. The roll former includes a first set of rollers that are configured to bend the sheet to form a common center wall in generally perpendicular orientation relative to first and second lateral portions of the sheet that extend in opposing directions from respective first and second radiused ends of the common center wall. The first set of rollers also form radiused edges on the first and second lateral portions. A second set of rollers is configured to form a channel rib longitudinally along each of the first and second lateral portions. A third set of rollers is configured to bend the first and second lateral portions simultaneously and equally to abut the first and second radiused edges with the respective first and second radiused ends of the common center wall to define adjacent tubes of the beam.

Abstract: An optical fiber communication system is provided, including a central office and an optical network unit. The central office generates a first downstream signal and a second downstream signal according to a radio frequency signal and a baseband signal, respectively. The optical network unit is coupled to the central office to receive the first downstream signal and the second downstream signal through a first fiber and a second fiber different from the first fiber, respectively, such that the optical network unit only modulates the second downstream signal to generate an upstream signal and then delivers the upstream signal to the central office through the first fiber, thereby decreasing signal Rayleigh backscatter noise.

Abstract: During the bending of sheet metal sections (1, 2) for forming can bodies by means of a bending machine, the sheet metal characteristics of the individual sheets are measured, e.g. the thickness and/or the strength of the sheets. The measured value is used to control the bending machine (4). This permits a substantially constant bending result to be achieved, even with varying sheet metal characteristics.

Abstract: A tube forming apparatus performs a forwardly rotating step in which a main roll is rotated forwardly with a pair of subsidiary rolls in a forming position during a move of a contact position between the main roll and a work from a first end of the work to a central portion of the work, a feeding step in which the main roll is rotated forwardly with the pair of subsidiary rolls in a retracted position during a move of the contact position between the main roll and the work from the central portion of the work to a second end of the work, and a reversely rotating step in which the main roll is rotated reversely during a move of the contact position between the main roll and the work from the second end of the work to the central portion of the work.

Abstract: There is provided a method of bending a medical suturing needle curved at different curvature radii in a length direction more reasonably.

Abstract: A method and a device are proposed which accurately and efficiently form a pipe with a bending machine only, without using any correcting devices. A plate having holes is fed into a bending machine in which under an upper roll, lower rolls parallel thereto are arranged, and a pipe is formed during a rough forming step and a fine forming step. In the rough forming step, bending is performed so that the plate will have a required diameter at hole portions. In the fine forming step, the hole portions are not pressed for bending while other portions are rolled so as to become closer to a required diameter to form the pipe.

Abstract: The present invention relates generally to a method and apparatus for temporarily reforming or deforming the lip portion of a resinous seal so that the seal may be readily installed in an intended application. The invention includes a method and apparatus that includes a fixed frame unit having two leg portions and a backbone portion, a slot in each position, an axle in each slot, and roller assemblies received over each axle, with adjustment means for each axle, the guide rollers being circumferentially spaced apart and the center or reforming roller being adjustable.

Abstract: A pontoon including a substantially cylindrical member having a length in excess of about 14 feet and having no external circumferential welds intermediate the ends of the member and being substantially linear along its length axis.

Abstract: Methods and systems are provided for the continuous coating and fabrication of spiraled steel rebar product for concrete structures. Specifically, methods and systems are provided by which linear uncoated rebar is supplied to a polymeric (preferably, epoxy) powder-coating unit whereby a substantially uniform coating layer of a polymeric material is applied onto the uncoated rebar to form a linear coated rebar; and thereafter the linear coated rebar is bent into a spiraled steel rebar product. The bending unit employed to bend the linear coated rebar includes a series of bending wheels having separated upstream and downstream bending wheels and a central bending wheel which is disposed between and below these upstream and downstream bending wheels. By bringing the linear coated rebar into contact with the series of bending wheels, the rebar may be bent gently into spiraled steel rebar product without damage to the polymeric surface coating.

Abstract: Methods and systems are provided for the continuous coating and fabrication of spiraled steel rebar product for concrete structures. Specifically, methods and systems are provided by which linear uncoated rebar is supplied to a polymeric (preferably, epoxy) powder-coating unit whereby a substantially uniform coating layer of a polymeric material is applied onto the uncoated rebar to form a linear coated rebar; and thereafter the linear coated rebar is bent into a spiraled steel rebar product. The bending unit employed to bend the linear coated rebar includes a series of bending wheels having separated upstream and downstream bending wheels and a central bending wheel which is disposed between and below these upstream and downstream bending wheels. By bringing the linear coated rebar into contact with the series of bending wheels, the rebar may be bent gently into spiraled steel rebar product without damage to the polymeric surface coating.

Abstract: In a pipe forming process using bending rolls, load applied to an upper roll is reduced to suppress the deflection of the upper roll, thereby suppressing creation of large end gap at the longitudinal center of the pipe, thus enabling production of high-strength, thick-walled elongated pipes. This is achieved either by (1) setting the roll spacing L between lower rolls to a value greater than the sum of the diameter Dwu of the upper roll 34 and the diameter Dwl of each of the lower rolls 32, and setting the amount S of tightening of the upper roll 34 with respect to the lower rolls 32 to a value greater than the radius Rwl of each of the plural rolls; or by (2) effecting pipe forming work on the sheet material such that the spacing L of the lower rolls 32 satisfies the following condition: (Dp+Dwl)>L≧0.

Abstract: A process for progressive wire formation is disclosed, comprising rotating a primary roller having a circumferential forming groove configured to receive a wire to be formed. A first stage roller having a circumferential forming groove configured to receive a wire to be formed engages the primary roller at a first contact point. A second stage roller having a circumferential forming groove configured to receive a wire to be formed engages the primary roller at a second contact point. A predetermined length of wire is run into the forming groove of the primary roller. The wire is compressed within the first stage roller forming groove at the first contact point and compressed within the second stage roller forming groove at the second contact point.

Abstract: A resin-coated ribbed steel pipe that is provided with an axially extending rib that is made from the same material as the coating and forms a hold groove is fed forward and bent along with the rotation of a shaping roller that is provided with an accommodating groove having a shape identical to the half of the cross section of the pipe that includes such rib and also has a protruding wheel that inserts itself into the hold groove as the pipe is fed forward, the reaction force created thereby being managed by a device that, possessing a shape identical to the other half of the cross section of the pipe, suppresses the reaction force and yet allows the feeding of the pipe.

Abstract: A metal bending machine comprising a lower pinchroller composed of modular interchangeable segments, and upper pinchroller composed of modular interchangeable segments, and a radius roller composed of modular interchangeable segments, the lower pinchroller being fixedly and rotatably mounted upon a pinchroller table, the upper pinchroller being rotatably and vertically adjustably mounted in alignment with and above the lower pinchroller, and the radius roller being rotatably and vertically adjustably mounted upon the pinchroller table behind the upper and lower pinch rollers, the upper and lower pinchrollers being counter-rotated with respect to each other by a rotating means, the segments of the upper and lower pinchrollers and the radius roller having annular channels therearound closely fitted to the cross-sectional profile of a workpiece to be bent by the metal bending machine, the metal workpiece being driven into and through the pinch point formed by the upper and lower pinchrollers, and into contact wi

Abstract: An apparatus for forming curved surgical needles is provided which includes a needle curving system for imparting an arcuate profile to sequentially presented needle blanks and a rotating system for pressing the needle blank against the curving system. The apparatus also includes needle supply and advancing systems for sequentially feeding and advancing the needle blanks to the needle curving system.

Abstract: An apparatus for forming curved surgical needles is provided which includes a needle curving system for imparting an arcuate profile to sequentially presented needle blanks and a rotating system for pressing the needle blank against the curving system. The apparatus also includes needle supply and advancing systems for sequentially feeding and advancing the needle blanks to the needle curving system.

Abstract: An apparatus method for bending channel cross-section strip or panel material in which the material is passed between an infeed roller set 10, 16, 18, an intermediate roller set 12, 20, 22 and an outfeed roller set 14, 24, 26. At least one of the rollers of each roller set has two axially spaced annular projections which define an accommodation space for the flanges of the strip material. The axial spacing between these annular projections is reduced between the infeed and outfeed roller sets to enable the panel cross-section to be retained over a wide range of panel materials and curvature.

Abstract: A device for bending metal wire or strips particularly adapted for arts and crafts creations in which a wire receiving gap is formed between a eccentrically driven forming pin and longitudinally and laterally separated guide pins disposed in relationship thereto. The elliptical driving pin movement allows the wire to be both formed and driven, that is, fed, into the device such that the craftsman may be free to manipulate the guide means to vary the gap as the work progresses. The elliptical movement of the driving pin is achieved by means of an actuating arm driven by a cam or equivalent system and including an adjustable pivot point to vary or control the amplitude of the elliptical movement.

Abstract: The invention is a method and apparatus, and resultant product, for altering the form of material comprising the steps of synchronously driving a plurality of forming wheels, the forming wheels grooved to a radial depth of predetermined amount; spatially aligning the driven wheels in predetermined relationship; and feeding the material to be further formed successively to each of the forming wheels. The radial depth is sufficient to fully entrap the material. The shape of the groove conforms to the shape of the material with minimum clearance to prevent binding and yet to permit exertion of forming forces on the material.

Abstract: The bending machine comprises two pairs of parallel feed rollers between which the pipe is fed in a given first direction, and a slide moving in a second direction perpendicular to the first and having a pair of bend rollers turning on it in idle manner; each of the said rollers being designed to press against and bend the said pipe subsequent to displacement of the said slide, and means being provided for lowering and clearing one of the said rollers from the said pipe when the other said roller is forced against the same for bending it subsequent to displacement of the said slide.

Abstract: In a process of bending sheet metal elements having a sectional shape which is continuous in one direction, longitudinal beads are formed or existing beads are enlarged in the sheet element as it is bent at least in the region in which the bending results in an upsetting of material, i.e., in the region in which the sheet metal element is subjected to compressive stress.

Abstract: A strip metal bending machine for bending formed strip material having for example an "I" section or a "U" section, said machine comprising a plurality of rolls arranged to act on the strip along a roll path so as to bend the strip, a first roll being provided with a pair of restraining means, each restraining means located either side of the roll path so that the strip is enclosed at a bending point between the restraining means and a contact surface of said first roll, said restraining means acting on the strip in a direction substantially at right angles to the direction of action of said contact surface of said first roll, means enabling continuous restraining adjustment of one restraining means relative the other of the pair during rolling action and control means for controlling said adjustment means.Such a machine enables material to be bent in a single pass with minimal or no twisting.

Abstract: A seal strip bending device for changing the diameter of seal strips used for pressure sealing strips of a steam turbine. The seal strips have a substantially L-shaped cross-section. The device includes a frame which houses a first roller having a first groove therein and a second roller spaced a predetermined clearance from the first roller such that the L-shaped seal strip is pulled through the first and second means to contact an adjustable bending roller to increase or decrease the diameter of the seal strip as desired.

Abstract: An apparatus and associated method is disclosed for introducing a curvature or sweep into a preferably previously-formed elongated article. The elongated article is substantially constrained, both laterally and transversely, as it moves longitudinally through the sweep-forming apparatus and is permanently deformed in a transverse direction in order to introduce the sweep or curvature therein.

Abstract: The invention relates to a process for the manufacture of a rigid, essentially elbow-shaped coaxial double pipe with a hollow space between inner and outer pipes, consisting of an elbow-shaped cold-bent high-pressure pipe for operating pressures of over 1000 bar as the inner pipe, the two shanks of the elbow each comprising a straight piece of pipe with a length of at least 5 times the outside diameter, and an elbow-shaped cold or hot-bent outer pipe which envelops the inner pipe in a manner as to leave an annular space between inner and outer pipes and extending the length of the outer pipe, with the outer pipe enveloping the bend and one straight shank only. Elbow-shaped coaxial double pipes of this type can, for instance, be part of a heat exchanger of up to 3000 m in length in the form of a coil type cooler comprising a plurality of straight pipes and U-shaped bends.

Abstract: Apparatus is provided for forming sheet metal ducts of varying conical configuration from pre-cut blanks having a baseline and element lines thereon. The apparatus comprises a frame supporting independent axially aligned feed rolls. Each roll is power driven by separate variable-speed motors providing for a different feed rate at each edge of the blank being formed. The driven sections of each feed roll are adjacent at the center of the axially aligned rolls. Idler rolls around the drive shaft form the remaining length of each roll. Corresponding segmented pinch rolls spaced axially at the center are arranged to pinch the blank to be formed against the feed rolls. Sensors are positioned between the spaced ends of the pinch rolls to detect the position of the blank baseline and the angularity of the element lines. The feed and pinch rolls are mounted on bases provided with bearings permitting axial shifting to maintain the blank baseline at the established position relative to the frame.

Abstract: A rolling machine assembly for use in a press brake formed of an upper roll subassembly including an upper roll and an upper base and a lower roll subassembly including a pair of lower rolls and a lower base, the bases being detachably secured to the ram and bolster, respectively, of the press brake. Motors of the positive displacement type, fed from a flow divider, rotate the rolls to form a sheet of metal into desired curvature. The lower base has symmetrically located sockets for reception of the tines of a forklift truck so that when the upper roll is in nested position upon the lower rolls, and the securing means are disengaged, the subassemblies may be lifted out of the press brake as a unit by the forklift truck to free the press brake for other usage, and with the reverse procedure being effective for installation.

Abstract: A support has spaced ends and a longitudinal passage which extends intermediate these ends. A carriage is mounted for movement in and lengthwise of the passage, and a drive is provided for moving the carriage. At least one first tool holder is provided on the carriage, and a mounting arrangement is located at one or both of the ends for mounting additional tool holders.

Abstract: An elongated workpiece is passed along an arcuate path defined by a pair of end rollers flanking a middle roller. At least one of the rollers is formed with a workpiece-receiving groove having flanks at least one of which has a milling formation for removing ridges that form on a workpiece passing along the arcuate path between the rollers. Thus, these ridges that form inherently on a workpiece that is bent are removed during the bending thereof to prevent the workpiece from jamming in the bending rollers.

Abstract: Apparatus and methods for forming generally tubular pipe covering sections with overlapping edge portions from a sheet of elastomeric material. For relatively thin material thicknesses the material is rolled on a male mandrel to provide a plurality of spiral wraps and this roll is heated to a selected temperature between 120.degree. F and 150.degree. F for at least 12 hours to effect a set in the roll. Selected lengths of the sheet material are cut from the roll to provide tubular pipe covering sections of a selected circumferential size. For relatively thick material thicknesses with substantial rigidity, a continuous roll of the material is cut transversely along its length to form a series of blanks. The length of the blank is established by the width of the roll and the width of the blank is selected according to the diameter of the pipe or insulated pipe to be covered.