Patents Assigned to SIPRA Patententwicklungs- u. Beteiligungsgesellschaft mbH
  • Patent number: 6318227
    Abstract: The strand guiding device is designed for a circular braiding machine having a braiding point (35) and a first spool (38) for a first strand (37) fed to said braiding point (35). The strand guiding device for strand guiding includes a guide part or guide device (42) for the first strand arranged between the first spool (38) and the braiding point (35), which is movable back and forth to cross the first strand (37) over at least one second strand (32) coming from a respective second spool (31) so that a length of a section of the first strand (37) between the first spool and the braiding point (35) continuously changes, and a device for compensating changes in the length of that section.
    Type: Grant
    Filed: November 22, 1999
    Date of Patent: November 20, 2001
    Assignee: Sipra Patententwicklungs- U. Beteiligungsgesellschaft mbH
    Inventor: Werner Scherzinger
  • Patent number: 6250114
    Abstract: A roller (1) for guiding knitwear produced on a knitting machine, with at least one stub shaft (3) of reduced cross-section projecting to the side of a middle part (2) and at least one first adjusting ring (16) which can be fixed on the stub shaft (3) to form an annular gap is described. The adjusting ring (6) has a first axial end (17) with an outer diameter corresponding to the outer diameter of the middle part (2) and a second axial end (17a) associated with the annular gap (22). In accordance with the invention the adjusting ring (16) is assembled from at least two shells (24, 25) adjoining one another along butt joints (FIG. 5).
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: June 26, 2001
    Assignee: Sipra Patententwicklungs- u. Beteiligungsgesellschaft mbH
    Inventor: Dietmar Traenkle
  • Patent number: 6178786
    Abstract: A knitting machine (1) comprises a shaft (2) with a recess (11) in which a selection element (12) provided with a controllable raising butt (20) is mounted swivellably and can be swivelled to and fro between a position in which the raising butt (20) is retracted into the recess (11) and a position in which the raising butt (20) projects forwards over the front side of the shaft (2). A spring (21), which can be attached to the selection element (12) or the shaft (2), serves to pre-tension the selection element (12) into one of these two positions (FIG. 1).
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: January 30, 2001
    Assignee: SIPRA Patententwicklungs- u. Beteiligungsgesellschaft mbH
    Inventor: Rolf Willmer
  • Patent number: 6167730
    Abstract: A sinker (1) for a circular knitting machine contains a shaft (2) with a recess (11) in which a selection element (12) provided with a controllable raising butt (20) is mounted swivellably and can be swivelled to and fro between a position in which the raising butt (20) is retracted into the recess (11) and a position in which the raising butt (20) projects upwards over the upper side of the shaft (2). A spring (21), which can be attached to the selection element (12) or the shaft (2), serves to pre-tension the selection element (12) into one of these two positions (FIG. 1). In addition, a selection device is provided for selecting the sinker (1) in accordance with a pattern.
    Type: Grant
    Filed: May 19, 1999
    Date of Patent: January 2, 2001
    Assignee: SIPRA Patententwicklungs- u. Beteiligungsgesellschaft mbH
    Inventor: Rolf Willmer
  • Patent number: 6151921
    Abstract: A circular knitting machine comprises a needle cylinder (2) and/or a dial (4) and a cam system (6, 7) associated therewith, said cam system having adjustable cam system parts (32, 33), which are preferably adjustable by rotatable eccentric studs (38) associated therewith. The circular knitting machine moreover comprises in accordance with the invention a setting device (48) which includes actuating members (58) for the eccentric pins (38), wherein the actuating members (58) and the eccentric pins (38) are provided with coupling elements (39, 72), which can be brought into engagement with one another in a defined coupling position. The setting of the cam system parts (32, 33) is effected in that the actuating members (58) are moved suitably after arrangement of the coupling position. The invention further relates to a setting device for this purpose, which can be attached removably to the circular knitting machine. (FIG. 4).
    Type: Grant
    Filed: November 3, 1998
    Date of Patent: November 28, 2000
    Assignee: Sipra Patententwicklungs - U. Beteiligungsgesellschaft mbH
    Inventor: Ernst-Dieter Plath
  • Patent number: 6151920
    Abstract: A circular knitting machine for the production of knitwear formed of yarns and fibers tied into these yarns is described. The circular knitting machine contains a needle cylinder (1) with knitting needles (2), a sinker ring (15) which is rotatable about an axis of rotation jointly with the needle cylinder (1) and has sinkers (16), a stationary cylinder cam and sinker cam means which is associated with the knitting needles and sinkers, respectively, yarn and fiber feed units, an air guiding unit (45) provided with at least one suction nozzle and/or blowing nozzle, and a control cam (85) for acting upon the inserted fiber tufts.
    Type: Grant
    Filed: November 3, 1999
    Date of Patent: November 28, 2000
    Assignee: Sipra Patententwicklungs- u. Beteiligungsgesellschaft mbH
    Inventors: Hartmut Schindler, Earl Robert Quay, Xuejian Zhu, Aiken Anderson Still, IV
  • Patent number: 6151924
    Abstract: A yarn delivery device for a textile machine has at least one yarn delivery roller, and a drive device for a propulsion of the delivery roller, the drive device including a drive belt, a drive roller with a peripheral section alterable in diameter and at least in part in part looped around by the drive belt, and a tensioning unit with a guide member acting on the drive belt, the tensioning unit including a controller for producing at least one larger belt tension for normal operation of the delivery roller and a smaller belt tension for alteration of the diameter of the peripheral section of the drive roller.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: November 28, 2000
    Assignee: Sipra Patententwicklungs- U. Beteiligungsgesellschaft mbH
    Inventors: Ernst-Dieter Plath, Stefan Seeger
  • Patent number: 6145347
    Abstract: A thread supplying device with intermittent thread consumption has at least one thread supplying unit including a rotatable thread supplying drum and a thread supplying device. The thread supplying drum has a first and a second peripheral portion forming corresponding friction surfaces for a thread to be supplied. The thread supplying device has an inlet element associated with the first peripheral portion and an outlet element associated with the second peripheral portion, and also has two movable guiding elements for the thread and associated with the peripheral portions. The thread is guided by the guiding elements between the inlet and the outlet element and cooperates successively with the first and the second peripheral portion and placed on an associated one of the peripheral portions in a supplying position of the guiding elements along a greater peripheral angle than in a non supplying position of the guiding elements.
    Type: Grant
    Filed: March 24, 1998
    Date of Patent: November 14, 2000
    Assignee: SIPRA Patententwicklungs- u. Beteiligungsgesellschaft mbH
    Inventor: Ernst-Dieter Plath
  • Patent number: 6141994
    Abstract: A knitting machine comprises at least one knitting implement carrier (1) having tricks (10) and knitting implements (8) slidably mounted therein, a cam system for guiding the knitting implements (8) in pass or raise tracks (15, 16), control jacks (9) formed as two-armed levers associated with the knitting implements (8), which jacks have controllable raising butts (21) and armature surfaces and are mounted freely pivotable in tricks (10) of the carrier (1), springs (26) bearing on the trick bottoms for biasing the control jacks (9) and at least one selector station with a control magnet (25) and a presser cam system part (24) for so turning the control jacks (9) that their armature surfaces are applied to the control magnet (25) and are then selectively held or released from this.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: November 7, 2000
    Assignee: SIPRA Patententwicklungs- u. Beteiligungsgesellschaft mbH
    Inventor: Ernst-Dieter Plath
  • Patent number: 6131417
    Abstract: A circular knitting machine has a knitting frame, a supporting ring mounted on the machine frame, a needle cylinder supported on the supporting ring. The needle cylinder has a needle cylinder axis and an upper and a lower edge. A carrier shaft is mounted in the machine frame coaxial to the needle axis, a component is mounted on a lower end of the carrier shaft, and a device is provided for moving the needle cylinder relative to the component in the direction of the needle carrier axis so that the needle cylinder can be disassembled or assembled by motions substantially perpendicular to the needle cylinder axis and so that the needle cylinder is movable into an operating position and an assembly position allowing assembly and/or disassembly.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: October 17, 2000
    Assignee: Sipra Patententwicklungs-U. Beteiligungsgesellschaft mbH
    Inventors: Ernst-Dieter Plath, Stefan Seeger, Dietmar Trankle, Kurt Juntner
  • Patent number: 6125662
    Abstract: A high/low plush knitwear with a ground fabric including a plurality of stitch courses and plush yarns (72,81) bound thereinto is disclosed. The ground fabric consists of knitting formed from at least one ground yam (68) and comprises at least one first portion (77) formed by a plurality of adjacent stitch wales with incorporated plush yarns (72,81) forming plush loops (72d, 81d) and at least one second portion (78) without such plush loops. According to the invention at least two float yarns (64,65) are additionally bound into the ground fabric. Each float yarn (64,65) in the second portion (78) selectively floats or is formed into stitches (80e-80h). The invention moreover concerns a method and a knitting machine for making such a plush knitwear (FIG. 16).
    Type: Grant
    Filed: February 18, 1998
    Date of Patent: October 3, 2000
    Assignee: Sipra Patententwicklungs- u. Beteiligungsgesellschaft mbH
    Inventors: Erich Bizer, Juergen Mueller, Walter Schmid
  • Patent number: 6089491
    Abstract: A yarn delivery device has a casing, a delivery drum rotatably mounted on the casing, a drive belt, at least one drive wheel propelling the delivery drum, the drive wheel having a peripheral section for application of the drive belt and being provided with at least one cleaning channel extending in a peripheral direction, and at least one scrapper attached to the casing and projecting at a point of a peripheral section remaining free of the drive belt into the cleaning channel.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: July 18, 2000
    Assignee: Sipra Patententwicklungs - U. Beteiligungsgesellschaft mbH
    Inventor: Ernst-Dieter Plath
  • Patent number: 6053015
    Abstract: A control jack for a knitting machine has at least one selector device for knitting implements, having a front side, a rear side, a first lower lever arm having a controllable raising butt and an armature surface, a second upper lever arm having a rocking butt, and a spring arranged on the rear side for biasing the second lever arm, wherein the arms are arranged on opposite sides of a bearing point and wherein the controllable raising butt, the rocking butt and the armature surface are formed on the front side.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: April 25, 2000
    Assignee: Sipra Patententwicklungs- u. Beteiligungsgesellschaft mbH
    Inventor: Ernst-Dieter Plath
  • Patent number: 5943883
    Abstract: A circular knitting machine for knitting patterned knitted fabrics (19) contains a preferably rotatable needle carrier (1) having knitting needles (3) distributed along a needle ring, selection devices (6) for selection of the knitting needles (3) in accordance with the pattern, a plurality of yarn guides (17) attached to the selection devices (6) to feed yarns (18) to the knitting needles (3), whereby these yarn guides (17) are arranged so that the yarns (18) are picked up by selected knitting needles (3) and tied into the knitted fabric (19) but passed over by non-selected knitting needles (3) with the formation of yarn floats, and at least one cutting device located within the needle ring for cutting through yarn floats of a given minimum length such that yarn ends on the fabric side and the yarn guide side are formed and the yarn ends on the yarn guide side remain in a position in the catchment area of the selected knitting needles that intersects with the needle ring.
    Type: Grant
    Filed: September 16, 1996
    Date of Patent: August 31, 1999
    Assignee: Sipra Patententwicklungs u. Beteiligungsgesellschaft mbH
    Inventors: Ernst-Dieter Plath, Peter Rehm, Dietmar Trankle, Gero Schindler, Paul Neher
  • Patent number: 5791162
    Abstract: The invention relates to a method, a knitting machine and sinkers (1, 2) for producing plush fabrics. The method is distinguished in that core and plush thread loops (48, 54) are preformed on selected sinker edges and are transferred prior to the actual stitch formation from these sinker edges to other preselected sinker edges by simple displacement of the sinkers (1, 2). For this purpose the knitting machine has first and second sinkers (1, 2), wherein the second sinkers (2) are provided with oblique faces (15). These are used, in the course of the transfer of the core thread loops (48) by means of retracting the first sinkers (1) and simultaneous advancement of the second sinkers (2), to act on the core thread loops (48) in such a way that the latter are securely enclosed in the slits of the first sinkers (1) when these are again advanced (FIG. 10).
    Type: Grant
    Filed: February 12, 1996
    Date of Patent: August 11, 1998
    Assignee: SIPRA Patententwicklungs- u. Beteiligungsgesellschaft mbH
    Inventor: Ernst-Dieter Plath
  • Patent number: 5787784
    Abstract: The circular braiding machine includes an inner and outer group of spools (31,38) arranged on a circular track coaxial with a rotation axis (1); a drive device (9-11, 17, 29, 42-45) for rotating the groups in opposite directions (r,s) around the circular track; strand guide members (48) for guiding strands (37) from one of the groups at a location between that group and a braiding point (35) so as to braid the strands, these strand guide members (48) being mounted to reciprocate along guideways (78) while keeping a constant distance from the braiding point (35); and a device for reciprocating the strand guide members (48) along the guideways (78), which operates synchronously with the drive device and which includes pivotally connected levers (73,77) for coupling the at least one strand guide member with the drive device, at least one rotatable crank device.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: August 4, 1998
    Assignee: SIPRA Patententwicklungs- u. Beteiligungsgesellschaft mbH
    Inventor: Werner Scherzinger
  • Patent number: 5749280
    Abstract: The invention relates to a circular braiding machine with two groups of spools (31, 38) circulating about an axis of rotation (1) on a circular path in opposite directions of rotation, the spools carrying strands (32, 37) for braiding a braided material (36) at a braiding point (35). In order to cross the strands (32, 37) in the manner characteristic of the braid (e.g. "2 over-2 under") there serve strand guide members (48) which are mounted to reciprocate on guide tracks (49) arranged substantially radially relative to the axis of rotation (1), as well as levers (50) which are arranged substantially in the extensions of the guide tracks (49) and are articulated in the manner of connecting rods at one end to the strand guide members (48) and at the other end to rotating crank levers (52).
    Type: Grant
    Filed: June 29, 1995
    Date of Patent: May 12, 1998
    Assignee: Sipra Patententwicklungs- U. Beteiligungsgesellschaft MBH
    Inventor: Werner Scherzinger
  • Patent number: 5590547
    Abstract: In a yarn feeder (2), the yarn feed may be effected by a yarn reserve (11) support spool (2), which is arranged to rotate by means of a motor (60). The yarn is taken up by and unwound from the spool as the latter rotates. Unwinding of the yarn reserve on the spool is not controlled. The size of the yarn reserve is monitored and yarn take-up is controlled accordingly. The unit also includes electrically contactless sensing and control devices (3), which are preferably located immediately adjacent to the rotary spool. The unit (3) is designed to sense the presence and quantity of yarn on the yarn reserve support surface (10) of the spool. The unit also controls the said motor.
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: January 7, 1997
    Assignee: Sipra Patententwicklungs-U.Beteiligungsgesellschaft mbH
    Inventor: Fritz Conzelmann
  • Patent number: 5129240
    Abstract: The invention relates to a circular knitting machine comprising a carrier for knitting implements, a cam arrangement and a heat exchange apparatus, and a provision of uniform temperature conditions on a circular knitting machine of that kind. The heat exchange apparatus comprises two circuits of which one is associated with the carrier and the other with the cam arrangement and which have a liquid heat exchange agent, preferably water, flowing through them. The uniform temperature conditions are achieved by the heat exchange output of at least one circuit being so controlled that substantially the same temperature difference obtains between the carrier and the cam arrangement in all operating conditions of the circular knitting machines.
    Type: Grant
    Filed: November 8, 1990
    Date of Patent: July 14, 1992
    Assignee: SIPRA Patententwicklungs-u.Beteiligungsgesellschaft mbH
    Inventor: Hartmut Schindler
  • Patent number: 5107689
    Abstract: The switching device is designed for switching on or off an electrical switching element assigned control to at least one functional unit of a knitting machine, including a timing generator and a pattern controlling device delivering binary control signals used for the selection or the non-selection of knitting needles according to a desired pattern. The switching device includes an electrical switching circuit having a first input connected to a pattern controlling device and an output connected to the electrical switching member, and further includes a device which, at the output, produces a switching, on or off signal when the input receives a predetermined sequence of the binary control signals of the same binary value, or when, after the predetermined sequence, there occurs a control signal of the other binary value or when this other conrol signal of the other binary value occurs after a predetermined time delay.
    Type: Grant
    Filed: March 26, 1990
    Date of Patent: April 28, 1992
    Assignee: SIPRA Patententwicklungs-u.Beteiligungsgesellschaft mbH
    Inventors: Ernst-Dieter Plath, Gerhard Grozinger