Abstract:
A braiding apparatus for braiding the perforated braid with constant intervals of perforation forms a first braid section to braid one strand with a plurality of yarns, sequential braid section to braid a certain length of braid with two strands and another sequential braid section to braid a final strand with the previous strands. The braiding apparatus equips a carrier guide plate (10) which has a pair of core yarn holes (12, 12null), two tracks of carrier contours (14, 14null) and a plurality of coupling holes (13, 13null), a base plate (40) disposed underneath the carrier guide plate (10), a plurality of carriers (20), feed gears (30) rotatably mounted on the base plate (40), feed discs (31) which are fixed on top of feed gear shafts (32), a pair of carrier contour changers (50, 50null), actuators (42, 42null) mounted underneath the base plate (40) for repetitively crossing and separating operations. Thus, various kinds of braids with constant intervals of perforations can be produced by using a differing number of core yarns and carriers.
Abstract:
A braided mechanical compression packing including relatively low and high-strength yarns is provided with greater mechanical strength along a given diagonal direction to provide a reinforced corner by providing the higher strength yarn along only one diagonal track of the braider. This reduces extrusion of the packing from the confines of the stuffing box in which it has been sequentially installed; produces a packing with rectilinear non-symmetry having directionally different friction, for instance, to facilitate gravity return of a hydraulic ram; and lowers operating friction by reducing the overall amount of high-strength yarn in the packing braid.
Abstract:
A module element for driving and retaining braiding bobbin carriers on a predetermined bobbin path has at least one base element that can rotate about an axis of rotation, and at least one retaining element that is formed integrally with the base element. The retaining element is configured to releasably hold at least one braiding bobbin carrier offset from the rotary axis.
Abstract:
A tubular support for use with a hollow fiber membrane is made with an apparatus that comprises a forming machine and an ultrasonic welding machine. The apparatus may also include a coating nozzle for depositing a dope on the support. In operation, filaments are formed into a tubular structure in which the filaments cross each other in radial and circumferential directions, for example a braid. The filaments are ultrasonically welded together at intersections between them. The support is combined with a polymeric membrane wall to form a hollow fiber membrane.
Abstract:
A hair braider is provided and is configured to perform a three-bundle plait or braid and includes a body having a handle and a head portion at one end of the handle; a selectively actuatable drive source disposed within the body; and first and second rotatable rotors that are disposed within the head portion and are accessible through openings formed in the head portion. The first and second rotatable rotors are operatively coupled to the drive source through a plurality of gears such that the first and second rotors rotate in opposite directions when the drive source is actuated. The hair braider further includes a plurality of hair retaining members that are received within openings formed through the first and second rotatable rotors, wherein each hair retaining member has a bore formed therethrough for receiving one bundle of hair. In addition, a mechanism for transferring at a transfer location one hair retaining member from one rotor to the other rotor as the rotors rotate, wherein the initial arrangement of the hair retaining members within the openings. The rotation of the rotors in opposite directions and the successive transfer of one hair retaining member from one rotor to the other rotor results in a true, three-bundle braid being formed.
Abstract:
Multi-layer tubular braided structures are produced by apparatus including a plurality of generally concentric pairs of serpentine, intersecting bobbin carrier-guiding tracks. A bobbin carrier driving gear group is associated with each pair of tracks, adjacent gear groups meshing at a plurality of bobbin carrier crossover points. According to the method, multi-layer tubular braided structures are produced by circulating a first group of bobbin carriers exclusively along one track of a first pair of tracks, circulating a second group of bobbin carriers exclusively along one track of a second pair of tracks, and circulating at least one other group of bobbin carriers exclusively along at least portions of the other tracks of said pairs of tracks via the crossover points.
Abstract:
A stent (1) comprising a hoselike body obtained by braiding a multiplicity of thin wires (2) of superelastic metal into plaited form. In the longitudinal intermediate portion of the hoselike body, mutually neighboring individual thins wires (2) of superelastic metal are in contact with each other or close to each other with a minute interspace and are formed into a thin wire densely braided hose portion (3) with a length needed to block any opening of blood vessel dilation. At both side portions thereof, mutually neighboring individual thin wires (2) of superelastic metal are formed into a thin wire coarsely braided hose portion (4) provided with an interstice allowing passage of blood flow. The hoselike body when pulled in the longitudinal direction causes the individual thin wires (2) of superelastic metal to strech into fine gathering, and when released from pulling can make resilient restoration to the original hoselike body.
Abstract:
A hair braider includes a body having a handle and a head portion. A selectively rotatable drive source is disposed within the body. First and second overlapping, rotatable rotors are disposed within the head portion and are operatively coupled to the drive source through a plurality of gears such that the first and second rotors rotate in opposite directions when the drive source is actuated. The hair braider includes a plurality of hair retaining members that are received within openings formed through the first and second rotatable rotors. Each hair retaining member has a bore formed within it for receiving a bundle of hair. A mechanism transfers one hair retaining member from one rotor to the other rotor as the rotors rotate. The rotation of the rotors and the successive transfer of one hair retaining member from one rotor to the other rotor results in a braid being formed.
Abstract:
A braiding apparatus for braiding the perforated braids with constant interval of perforations comprises a first braid section to braid one strand with a plurality of yarns, sequential braid section to braid with two strands and secondary sequential braid section to braid a final strand with the previous process of the strands. This braiding apparatus comprises a carrier guide plate (10) having a pair of core yarn holes (12), a plurality of coupling boles (13), two tracks of carrier contours (14), a base plate (40) having a plurality of carriers (20), feed gears (30), feed discs (31), feed gear shafts (32), actuators (42), carrier contour changers (50) including a main block (60), intermediate cross block (70) and inner split block (80) for performing repeated crossing and separating operations. So, the various braids with constant interval of perforations are possibly produced by differ the number of core yarns and carriers.
Abstract:
A high-speed braiding machine comprises a central disc and a surrounding annulus which are both stationary with respect to a chosen frame of reference for all the motions. Lobes on the inner periphery of the annulus are intercalated with lobes on the periphery of the disc to define between them an endless continuous sinuous gap; and carriers for bobbins of an inner set are mounted to one side of the disc and annulus so as to be rotatable about a machine axis passing through the central area of the disc whilst threads from bobbins mounted thereon pass through the sinuous gap to a braiding point spaced from the disc on its opposite side. On the side of the disc and annulus facing the braiding point and partly carried by the lobes of each of them is a circular track, concentric with the machine axis, the path of which repeatedly crosses the sinuous gap, but the track is interrupted where it does so. Carriers for bobbins of an outer set mounted on the said track are each of sufficient length in the direction of the track to pass freely over the gaps therein. Concentric central and peripheral actuator heads on the same side of the disc and annulus as the track are mounted for rotation in unison in the opposite direction to the carriers for the bobbins of the inner set, the central actuator head having an external radius less than the minimum radius of the lobed disc and the peripheral actuator head correspondingly having an internal radius greater than the maximum internal radius of the lobes annulus. On each actuator head a series of actuator fingers, one finger for each carrier of the outer set, can be projected into the annular gap between the actuator heads to engage the associated carrier and can be withdrawn to clear the said sinuous gap to allow passage of thread from a bobbin of the inner set. When the machine is in operation each carrier of the outer set is always engaged by at least one actuating finger but the passage of threads from the inner set of bobbins is not obstructed.