Take-ups Patents (Class 112/241)
  • Patent number: 10100450
    Abstract: A presser foot 12c of a sewing machine is provided with a main body 210, a swayingly reciprocating mechanism section 230, and a thread hooking rod drive motor 240. The swayingly reciprocating mechanism section 230 has a thread hooking rod 236, and a needle thread receiving section for fixing a needle thread together with the thread hooking rod 236 is provided inside a leading-end structure section 216 of the main body 210. As a result of driving of the thread hooking rod drive motor 240, the swayingly reciprocating mechanism section 230 reciprocally moves while swaying with respect to the main body 210. When a thread take-up lever pulls up the needle thread, a circular movement arm which performs rotation movement while hooking the needle thread adjusts a rotational angle of the circular movement arm, thereby enabling adjustment of a length of a needle thread in one preceding stitch.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: October 16, 2018
    Assignee: NSD CORPORATION
    Inventors: Yoshichika Takizawa, Masayoshi Ono, Hirotsugu Uenishi
  • Patent number: 8833282
    Abstract: Sewing machine includes, in association with each thread take-up levers: a thread take-up member provided on the front surface of a support member cover and having a thread take-up spring; a prevention member for preventing a thread, put on the thread take-up spring, from flowing rearward; a cover member provided in front of the thread take-up member and independently detachable in a forward direction; and a guide section having a valley portion formed therein for receiving therein a distal end portion of the thread take-up spring and movably guiding the received distal end portion. The cover member has a lower end portion opened to permit insertion therein of a thread and is constructed to guide the thread from the lower end portion to the thread take-up spring. The cover member may further include a guide wall for guiding the thread from the lower end portion to the thread take-up spring.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: September 16, 2014
    Assignee: Tokai Kogyo Mishin Kabushiki Kaisha
    Inventor: Takahiro Yoshida
  • Publication number: 20130298812
    Abstract: Sewing machine includes, in association with each thread take-up levers: a thread take-up member provided on the front surface of a support member cover and having a thread take-up spring; a prevention member for preventing a thread, put on the thread take-up spring, from flowing rearward; a cover member provided in front of the thread take-up member and independently detachable in a forward direction; and a guide section having a valley portion formed therein for receiving therein a distal end portion of the thread take-up spring and movably guiding the received distal end portion. The cover member has a lower end portion opened to permit insertion therein of a thread and is constructed to guide the thread from the lower end portion to the thread take-up spring. The cover member may further include a guide wall for guiding the thread from the lower end portion to the thread take-up spring.
    Type: Application
    Filed: May 8, 2013
    Publication date: November 14, 2013
    Inventor: Takahiro Yoshida
  • Publication number: 20100126396
    Abstract: The invention relates to a chain stitch sewing machine comprising stitch-forming sewing elements including at least one needle head (1) and needles (6) arranged on the needle head and at least one gripper shaft and gripper hooks arranged on the gripper shaft, wherein the needles (6) and the gripper hooks respectively form a sewing element pair and are driven in a manner such as to perform preferably chain stitches and especially double chain stitches in a sewing material arranged on a sewing material support, respectively using a needle thread and a gripper thread.
    Type: Application
    Filed: November 17, 2009
    Publication date: May 27, 2010
    Applicant: Nähmaschinenfabrik Emil Stutznäcker GmbH & Co. KG
    Inventor: Klaus Stutznäcker
  • Patent number: 7647877
    Abstract: A thread take-up lever for a sewing machine is mounted on the sewing machine and can prevent a thread from disengaging from a thread-receiving portion. The thread take-up lever is disposed with a C-shaped thread-receiving portion having an open recess. Adjacent to the open recess is provided at least one positioning portion for fixing a thread-stopping member. One end of the thread-stopping member is fixed to the positioning portion, and an elastic stopping portion extends from the other end of the thread-stopping member. The stopping portion is formed with a free end abutted against an inner periphery of the open recess. The free end can be pushed away by the thread, and then the free end will automatically return to its original position immediately to abut against the open recess again, thus forming a structure to prevent the thread from disengaging from the thread-receiving portion.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: January 19, 2010
    Inventor: Hsien-Chang Tseng
  • Publication number: 20090277367
    Abstract: A thread take-up lever for a sewing machine is mounted on the sewing machine and can prevent a thread from disengaging from a thread-receiving portion. The thread take-up lever is disposed with a C-shaped thread-receiving portion having an open recess. Adjacent to the open recess is provided at least one positioning portion for fixing a thread-stopping member. One end of the thread-stopping member is fixed to the positioning portion, and an elastic stopping portion extends from the other end of the thread-stopping member. The stopping portion is formed with a free end abutted against an inner periphery of the open recess. The free end can be pushed away by the thread, and then the free end will automatically return to its original position immediately to abut against the open recess again, thus forming a structure to prevent the thread from disengaging from the thread-receiving portion.
    Type: Application
    Filed: May 6, 2008
    Publication date: November 12, 2009
    Inventor: Hsien-Chang TSENG
  • Patent number: 7461605
    Abstract: A sewing machine having a reciprocatory needle and a reciprocatory thread-take-up device to deliver thread to the needle employs a thread control device located between the thread take-up device and the needle to engage and apply light tension to the thread. The thread control device can have an opposed plate and spring wire between which the thread runs and which cooperate to apply spring pressure to the thread. Downstream thereof a thread brush can be employed through which the thread runs. The thread can be further lightly tensioned and laterally positioned by the thread brush. The guide plate or other device can include catcher structure to catch thread escaping the take-up device. The thread control device can help control premature descent of the thread and improperly tensioned stitches.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: December 9, 2008
    Assignee: KSIN Luxembourg III, S.ar.l.
    Inventor: Paulo Eduardo Rodrigues Couto
  • Patent number: 7322304
    Abstract: A multi-needle sewing machine capable of preventing twisting (twinning) associated with the oversupply state of a second thread element owing to the abrupt lowering of a thread take-up am even when the vertical reciprocation speeds of the needle bar and the thread take-up are increased to raise the efficiency of sewing. A recess is formed so that the second thread element that is pulled using the through hole of the thread take-up arm while at a bottom dead center can fall into the recess, the thread is lowered abruptly and is in a oversupply state and can be deflected within the recess bounded by jump preventing faces and a beaten thread portion face, so as to make contact with the faces and prevent the thread from jumping.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: January 29, 2008
    Assignee: Kabushikikaisha Barudan
    Inventor: Kiyoyuki Ishihara
  • Publication number: 20070209564
    Abstract: In the disclosed sewing machine, when a needle threading switch is operated when sewing operation is stopped, a needle bar drive mechanism is activated, a needle threading hook is moved forward to a threading position, and a thread take-up is lowered by predetermined distance by driving a sewing machine motor in reverse rotation after threading a hook portion with a needle thread. Thus, a thread engaging portion of a check spring absorbs loss of required thread amount at the thread take-up and moves from a spring force operable position to a spring force inoperable position. Thus, the needle threading hook retracts to a loop cancel position and the needle thread reliably threads the sewing needle with secure engagement with the needle threading hook when a needle thread end is pulled off from a first thread retaining portion since needle thread is stabilized by absence of needle thread tension.
    Type: Application
    Filed: March 6, 2007
    Publication date: September 13, 2007
    Applicant: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Yasuhiko Kawaguchi, Yasukazu Noguchi, Noriko Kawabe
  • Patent number: 6513448
    Abstract: A sewing machine capable of preventing formation of no first stitch (skipping stitch), which is readily caused immediately after the sewing machine starts to operate, is obtained. This sewing machine comprises a first detector detecting that a thread engaging part of a balance is located in the vicinity of a forward movement starting point leftward beyond a thread receiving opening of a thread guide plate and an indicator operating on the basis of a detection signal received from the first detector. Thus, the operator can recognize that the thread engaging part of the balance is located in the vicinity of the forward movement starting point leftward beyond the thread receiving opening of the thread guide plate through the indicator.
    Type: Grant
    Filed: November 19, 2001
    Date of Patent: February 4, 2003
    Assignee: Jaguar International Corporation
    Inventor: Hajime Kobayashi
  • Patent number: 6382119
    Abstract: A multineedle embroidering sewing machine comprising at least one sewing machine head provided with a plurality of needle bars and a plurality of thread take-up levers corresponding to the needle bars, needle thread deflecting sections, respectively, arranged upstream of the respective thread take-up levers existing in needle thread paths, and thread take-up members provided correspondingly on the respective needle thread deflecting sections.
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: May 7, 2002
    Assignee: Tokai Kogyo Mishin Kabushiki Kaisha
    Inventors: Ikuo Tajima, Isao Ohashi
  • Patent number: 6325006
    Abstract: Disclosed is a thread feeding apparatus for an automatic embroidering machine. The apparatus is comprised of a head stem having a needle-working unit; a thread supplying unit supplying a colored thread selected among a plurality of threads; a guide pipe assembly provided at said head stem, having a first guide pipe receiving the thread from said thread supplying unit, and a second guide pipe having an upper end spaced axially from said first guide pipe and a lower end adjacent to said needle-working unit; and a thread taking-up unit having a take-up lever moving up and down across a thread transferring path, and a take-up bar coupled with the take-up lever in a transverse direction relative to movement of the take-up bar, moving reciprocally through a space between said first and second guide pipes according to the movement of said take-up lever, to allow said thread to be strained or loosened.
    Type: Grant
    Filed: January 23, 2001
    Date of Patent: December 4, 2001
    Inventor: Ham-Kyu Park
  • Patent number: 6247419
    Abstract: A multineedle embroidering sewing machine comprising at least one sewing machine head provided with a plurality of needle bars and a plurality of thread take-up levers corresponding to the needle bars, needle thread deflecting sections, respectively, arranged upstream of the respective thread take-up levers existing in needle thread paths, and thread take-up members provided correspondingly on the respective needle thread deflecting sections.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: June 19, 2001
    Assignee: Tokai Kogyo Mishin Kabushiki Kaisha
    Inventors: Ikuo Tajima, Isao Ohashi
  • Patent number: 6047653
    Abstract: A sewing machine for forming a "lock stitch" in a fabric material includes a reciprocally-mounted needle bar, a reciprocally-mounted needle thread take-up lever, and a rotary hook assembly located beneath the needle bar. In one embodiment, the sewing machine includes a needle thread take-up lever mounting and reciprocally moving device for reciprocally moving the take-up lever such that the distal needle thread engagement end thereof moves up and down in an arcuate path at a constant speed in timed relationship with the reciprocal movement of the needle bar.
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: April 11, 2000
    Inventor: David R. Cash
  • Patent number: 5983818
    Abstract: A sewing machine that has at least one needle which moves with alternating motion, taking the upper thread through the piece to the sewn, a shuttle to hook an upper thread to form a loop below the piece to be sewn, a bobbin housing in a bobbin-case located internally in the shuttle, the bobbin containing a lower thread which overlaps the upper thread through the loop, two mutually independent levers which act on the upper thread and are mobile with periodic motion between a position where the upper thread is allowed to be fed to the shuttle and a position of complete recovery of the upper thread in which the loop is closed to form a stitch, the upper thread being synchronized with movement of the levers by periodic tension.
    Type: Grant
    Filed: September 24, 1998
    Date of Patent: November 16, 1999
    Assignees: Sabino Tramutolo, Bruno Cordini
    Inventors: Sabino Tramutolo, Bruno Cordini
  • Patent number: 5957069
    Abstract: The present invention is directed to a multi-head multi-needle sewing machine system adapted to change threads by horizontally moving sewing heads, which system provides for space savings and further increase in the number of sewing heads and colors of threads to be employed. For this purpose, needle-bar support frames 6 are each guided in the horizontal movement thereof by one guide rail 31 horizontally extending over the whole length of a sewing machine system 1. A thread take-up positioning piece 63 for maintaining undriven needle thread take-ups 5 at a raised position is secured to place as extending substantially between the centers of adjacent arms 3. In this multi-head multi-needle sewing machine system 1, the movement ranges of the needle-bar support frames 6 of the respective sewing heads partially overlap with each other but there is no fear of interference therebetween because the needle-bar support frames 6 horizontally travel for the same amount in the same direction.
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: September 28, 1999
    Assignee: Kabushikikaisha Barudan
    Inventor: Masanori Shibata
  • Patent number: 5899156
    Abstract: A thread control device for a chainstitch sewing machine comprises a thread feeder which is moved simultaneously with the stitching needle by the drive means for the stitching needle. The thread feeder is attached in such a manner as to be able to oscillate at a pivot drive which is allocated to a shaft rotatably mounted in the upper arm casing of the sewing machine.
    Type: Grant
    Filed: April 17, 1997
    Date of Patent: May 4, 1999
    Assignee: Union Special GmbH
    Inventors: Dieter Schopf, Hans-Dieter Bartholoma
  • Patent number: 5816175
    Abstract: A thread control apparatus for a double chain stitch sewing machine of the present invention is applied to the case of sewing a cloth with a double chain stitch sewing machine having multiple needles, and forming a thread chain consecutively to the sewing end of the cloth. Two thread tensioning devices change over and apply mutually different thread tensions to needle threads and to a looper thread passed through a plurality of needles and a looper, respectively, when sewing the cloth and when forming a thread chain. An other looper thread tensioning device disposed in a thread route between a looper thread take-up device and the looper. The other looper thread tensioning device limits the draw-out amount of thread by pinching the looper thread from the looper thread take-up device to the looper side only when forming a thread chain, and therefore a tight thread chain may be securely formed when forming a thread chain.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: October 6, 1998
    Assignee: Pegasus Sewing Machine Mfg. Co., Ltd.
    Inventor: Masashi Teramoto
  • Patent number: 5655471
    Abstract: A thread take-up lever guard in a multi-needle sewing machine provided with a support disposed on the front surface of a head, a plurality of needle bars each having a needle attached to the lower end, and a plurality of thread take-up levers disposed to oppose the needle bars respectively and protruded from the support to be able to oscillate vertically. The thread take-up lever guard prevents a needle thread carried on a selected thread take-up lever from being caught by an adjacent thread take-up lever assuming a standing posture or is tangled with another needle thread carried on the standing thread take-up lever. The thread take-up lever guard comprises a separator disposed on the support such that every adjacent two thread take-up levers may be isolated from each other over a predetermined range of routes along which the take-up levers reciprocate.
    Type: Grant
    Filed: May 22, 1996
    Date of Patent: August 12, 1997
    Assignee: Tokai Industrial Sewing Machine Co., Ltd.
    Inventor: Ikuo Tajima
  • Patent number: 5495816
    Abstract: In a two-needle sewing machine for making an ornamental stitch without a cover stitch, at least one intermediate lug (17) is provided which is disposed in side by side relation with respect to an upper thread take-up (13) engaged to the needle bar (7), said intermediate lug, in the absence of a workpiece (4) on the needle plate (8), is brought to a work position in which it interferes with one of the needle threads (4a, 4b) coming from an auxiliary thread take-up (12) being part of a feed unit for the needle threads. In the presence of the intermediate lug (17) in the work position, the orientation of the needle thread (4a) intercepted by said intermediate lug is suitably deviated with respect to the upper thread take-up (13), so as to cause a tension release on the needle thread itself during the raising steps of the needles (3a, 3) towards the upper dead center of their reciprocating motion.
    Type: Grant
    Filed: July 28, 1994
    Date of Patent: March 5, 1996
    Assignee: Rimoldi Necchi S.R.L.
    Inventors: Roberto Sanvito, Franco Marchesi
  • Patent number: 5441003
    Abstract: A sewing machine is comprised of a bed, an arm having a vertical portion set upright on the bed, and a horizontal portion horizontally extending from the upper end of the vertical portion, an arm shaft extended within and journaled on the arm, a sewing head detachably joined to the extremity of the arm, a needle bar incorporated into the sewing head, supported so as to be driven for vertical reciprocation on the sewing head by the arm shaft, and capable of being removed from the arm together with the sewing head, a motion converting means detachably connected with the needle bar to convert the rotation of the arm shaft into the reciprocation of the needle bar, a needle thread feed device disposed on the sewing head to feed a needle thread to a needle attached to the lower end of the needle bar, and a thread takeup device disposed on the arm and capable of operating in synchronism with the vertical reciprocation of the needle bar to draw up the slack needle thread and of releasing the needle thread.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: August 15, 1995
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventor: Tadaaki Hashiride
  • Patent number: 5373795
    Abstract: A sewing machine including a sewing needle which conveys a needle thread; a needle bar which supports the sewing needle; a driver which generates a drive force; a first transmission mechanism which transmits the drive force of the driver to the needle bar so as to reciprocate the sewing needle in an axial direction of the needle; a work-sheet presser foot which is movable parallel to the needle bar; a needle thread take-up lever which takes up the needle thread conveyed by the sewing needle; a take-up-lever support member which supports the needle thread take-up lever, the take-up-lever support member being pivotable about a fixed axis line by being driven by the driver, for oscillating the needle thread take-up lever; and a second transmission mechanism which is independent of the needle bar, and transmits the pivotal motion of the take-up-lever support member to the presser foot so that the presser foot reciprocates in relation with the oscillation of the needle thread take-up lever.
    Type: Grant
    Filed: September 21, 1993
    Date of Patent: December 20, 1994
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Satoshi Kato
  • Patent number: 5327840
    Abstract: In a sewing machine having a needle bar and a shuttle driven by a main shaft and having a thread take-up lever vertically reciprocally movable in response to movement of the needle bar and the shuttle, a thread take-up lever driving device include a stroke adjusting device for adjusting a vertical stroke of the thread take-up lever in response to change of the sewing operation or in response to the material of a work fabric to be sewn.
    Type: Grant
    Filed: November 17, 1992
    Date of Patent: July 12, 1994
    Assignee: Tokai Kogyo Mishin Kabushiki Kaisha
    Inventors: Ikuo Tajima, Satoru Suzuki, Youichi Mizuguchi
  • Patent number: 5213053
    Abstract: An embroidery machine has its main shaft provided with a cam for controlling the thread takeup at an embroidery needle bar. A cam follower of the transmission arm of the pivotal thread-guide lever is held against the cam by a force-generating means such as a spring or a fluid-operated cylinder and a device is provided for swinging the thread-guide lever into a selected other position, e.g. for thread cutting.
    Type: Grant
    Filed: August 9, 1991
    Date of Patent: May 25, 1993
    Assignee: ZSK-Stickmaschinen-Gesellschaft mit beschrankter Haftung
    Inventors: Uwe Webers, Paul Woelfle
  • Patent number: 5131338
    Abstract: A regulating mechanism for needle thread between a standard thread tensioning device in the head of the upper arm of a sewing machine and the eye of the reciprocable needle employs a lever-shaped takeup member which is oscillated in the head in synchronism with the movements of the needle, and a wire spring which is mounted directly on the takeup member. The spring has a U-shaped thread engaging portion which surrounds and cooperates with a hook-shaped arm of the takeup member to define a passage for needle thread. The spring tensions the thread during certain stages of each stitch forming step.
    Type: Grant
    Filed: March 22, 1991
    Date of Patent: July 21, 1992
    Assignee: Fritz Gegauf Aktiengesellschaft
    Inventors: Hanspeter Vogel, Nicklaus Wacker
  • Patent number: 5069150
    Abstract: A sewing machine including an automatic thread taking-up operation which comprises an arm of a thread take-up projecting beyond a thread holding member, a needle thread carrying member for introducing the needle thread into the thread holding member when the thread take-up swings toward one end of a thread guide, a pathway for the needle thread formed in the thread holding member, a blocking member for preventing the needle thread from slipping out of the thread holding member, and a crossing member for helping the needle thread carried beyond the thread taking-up member to cross the thread guide. The sewing machine can easily perform thread taking-up operation and threading operation while the thread take-up swings vertically.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: December 3, 1991
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Masao Ogawa
  • Patent number: 5063866
    Abstract: In a sewing machine, a thread-draw lever is driven in an oscillating movement, in synchronism with a needle bar, and carries a gripping hook for the thread, the thread being brought within reach of this hook by passing it into a longitudinal channel formed on an upper face of an upper arm of the casing of the machine.The arrangement permits the threading operation in a sewing machine to take place by simple insertion of the thread into the channel, without having to pass the thread through eyelets.
    Type: Grant
    Filed: November 30, 1989
    Date of Patent: November 12, 1991
    Assignee: Mefina S.A.
    Inventors: Antonio Jimenez, Michel Combepine
  • Patent number: 5001997
    Abstract: A sewing apparatus for use on a quilting machine having an intermittent tension mechanism and a hopping presser foot mechanism cooperating with eccentric cams located on the main drive shaft of the sewing apparatus.The intermittent tension mechanism includes an eccentric cam having an outer surface adapted to abut a cam follower which engages thread holding tension disks that are biased together by action of a spring. Pressure between the disks is increased during the final tightening of the stitch due to the reciprocating motion of the cam follower.The hopping presser foot mechanism includes a rocking bar pivotally connected at one end to a reciprocating arm and slidingly and pivotally connected at the other end to a presser foot bar. A ball and race mechanism pivotally connects the rocking bar with the reciprocating arm. The arm reciprocates due to action of the eccentric cam.
    Type: Grant
    Filed: March 21, 1990
    Date of Patent: March 26, 1991
    Assignee: Kennoth G. Gammill
    Inventor: Ching W. Wang
  • Patent number: 4949657
    Abstract: A sewing machine comprises a thread deflecting device arranged between a thread take-up lever and a needle and which in response to a swinging movement of a needle bar effected in response to selection of a zigzag stitch, deflects the upper thread laterally of a fabric feeding direction. A thread blocking device is provided on one side of the thread deflecting device. The sewing machine further comprises an actuator operated in response to actuation of a zigzag stitch pattern selecting key to move the thread blocking device to an operative position thereof. The thread blocking device in the operative position blocks the upper thread as it is deflected in one direction by the thread deflecting device to give a predetermined degree of tension to the upper thread, so that the stitch is tightened on one side of the zigzag stitch in addition to the tightening of the stitch by a thread take-up lever.
    Type: Grant
    Filed: November 2, 1988
    Date of Patent: August 21, 1990
    Assignee: Janome Sewing Machine Co. Ltd.
    Inventors: Susumu Hanyu, Noboru Kasuga, Kazumasa Hara, Mikio Koike
  • Patent number: 4924789
    Abstract: A device for driving a thread take-up lever in a multi-head sewing machine having a plurality of sewing heads, one or more thread take-up levers each mounted on a respective head, and a main shaft for driving the heads. The device comprises a movement converting mechanism located within each head for converting rotational movement of the main shaft into reciprocating movement thereof, a transmission control mechanism operatively associated with the movement converting mechanism for transmitting and disconnecting the reciprocating movement produced by the movement converting mechanism to one of the thread take-up levers selected for sewing operation, and a retaining mechanism for retaining the selected take-up lever in a predetermined position when the reciprocating movement of the movement converting mechanism is disconnected from the selected take-up lever by the transmission control mechanism.
    Type: Grant
    Filed: June 21, 1989
    Date of Patent: May 15, 1990
    Assignee: Tokai Kogyo Mishin Kabushiki Kaisha
    Inventors: Ikuo Tajima, Tomoaki Anezaki
  • Patent number: 4907517
    Abstract: A thread guiding device in a sewing machine comprising a guide path for guiding an upper thread from a thread source to a needle and defined by a first thread guide, a pair of discs for releasably holding an upper thread, and a second thread guide formed by a spring hook of a thread tension spring member and an end portion of a take-up lever, the first and second thread guide and the thread tension spring member lying in a common plane to define a straight-line guide path.
    Type: Grant
    Filed: March 11, 1988
    Date of Patent: March 13, 1990
    Assignee: Janome Sewing Machine
    Inventors: Susumu Hanyu, Mikio Koike
  • Patent number: 4869186
    Abstract: A needle thread tension control system includes a pair of thread clamping members and a driving mechanism for driving the thread clamping members in timed relation with the rotating speed of a arm shaft. A controlling mechanism controls the driving mechanism to effect a disengaging displacement of the thread clamping members to be smaller than an amount of engaging displacement therof for a predetermined angle of rotation of the arm shaft. The controlling mechanism includes a specific cam drive linkage in the driving mechanism to effect the differential displacements of the clamping members.
    Type: Grant
    Filed: April 26, 1988
    Date of Patent: September 26, 1989
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Masao Ogawa
  • Patent number: 4856443
    Abstract: A thread checking device is installed in combination with a sewing machine in order to exert a proper tension on the thread loop formed at the eye of the needle when the thread loop passes through betweeen the bobbin case and the rotation stopping member for restraining rotation of the bobbin case. This thread checking device is provided with thread suspending means which comprises a thread suspending part disposed near a specified position where the thread guide of the thread take-up member is located when the needle thread loop passes between the bobbin case and the rotation stopping member. The thread suspending means suspends the needle thread held on the thread guide with the suspending part when the take-up member moves from the maximum thread take-up position to the maximum thread slack position.
    Type: Grant
    Filed: May 13, 1988
    Date of Patent: August 15, 1989
    Assignee: Okamura & Co.
    Inventors: Masao Ogawa, Noboru Ito, Yukio Yamamura
  • Patent number: 4825786
    Abstract: A method and apparatus for forming stitches with a sewing machine by periodically rewinding needle thread onto its spool as a sewing needle pulls off bobbin thread so as to form tight lock stitches without a take up lever.
    Type: Grant
    Filed: June 12, 1987
    Date of Patent: May 2, 1989
    Inventor: William A. Burch
  • Patent number: 4817545
    Abstract: An upper thread is guided to extend vertically by a pair of thread guides vertically opposted to each other. A thread take-up lever is installed so that it is horizontally reciprocated across the space between the pair of thread guides. When the thread take-up lever is reciprocated, it engages the thread positioned between the thread guides to draw it in V-form during its forward travel and stops drawing the thread to form a slack in the thread in its return travel. To prevent this slacked thread portion from clinging to the thread take-up lever, a thread holding member or thread braking member made of easily deformable material and adapted to contact the thread to thereby prevent the thread from following the movement of the thread is installed at at least one position along the path of travel of the thread engaging portion (10, 10a, 10b, 10c 50) of the thread take-up lever.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: April 4, 1989
    Assignee: Maruzen Sewing Machine Co., Ltd.
    Inventors: Yoshio Mikuni, Osamu Tanaka
  • Patent number: 4791876
    Abstract: In a conventional sewing machine, as the take-up lever is driven by the take-up lever crank, the take-up lever does not keep its uppermost position during the feed motion of a work fabric. Accordingly, the length of the thread path extending from the thread supply source to the eye of the needle varies remarkably during feed motion, and thus the needle thread equivalent to the amount consumed by stitch feed motion cannot be extracted from the supply source. In the present automatic needle thread supply control system, during a specific period from a time before finishing of each feed motion to a time when the needle reaches the throat plate, the take-up lever is held at its uppermost position. During a given period corresponding to the comparatively latter half of the specified period, thread supply stopping is released, whereby the needle thread equivalent to the amount consumed by each stitch feed motion can be extracted certainly from the supply source toward the take-up lever.
    Type: Grant
    Filed: February 19, 1987
    Date of Patent: December 20, 1988
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Toshio Sasaki, Masao Ogawa
  • Patent number: 4776292
    Abstract: A demand responsive sewing machine thread take-up construction is disclosed accommodating a shortened thread introduction path which facilitates operator interface and reduces construction costs while providing for improved reliability and uniformity of thread manipulation by the take-up.
    Type: Grant
    Filed: December 7, 1987
    Date of Patent: October 11, 1988
    Assignee: SSMC Inc.
    Inventors: Donald Rodda, Robert H. Larsen
  • Patent number: 4719865
    Abstract: A sewing machine with thread take-up mechanism is so constructed as to vertically move a take-up member, supported on a needle bar in such a manner as to be vertically movable at a timing which is different from that of the movement of the needle bar on which the take-up member is moved. The take-up member has a hole through which a thread being lead to the sewing needle is inserted.
    Type: Grant
    Filed: November 14, 1986
    Date of Patent: January 19, 1988
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Masaaki Yokoe, Yoshikazu Kurono, Koji Hayashi, Miho Hashimoto
  • Patent number: 4688501
    Abstract: A slit (7) is formed which lies in a vertical plane and extends from an upper surface of a sewing machine frame (1) to a front surface. A tension device (5), a thread take-up spring (30), and upper and lower thread guides (23, 24) are disposed along the direction in which the slit (7) extends. A thread take-up lever (12) is installed so that it is reciprocated horizontally across the space between the pair of thread guides (23, 25). The placement of the thread in the tension device (5), thread take-up spring (30), and two thread guides (23, 24) can be attained by simply pulling the upper thread vertically downward through the slit (7). When the thread take-up lever is reciprocated, during its forward stroke it arrests the portion of the thread positioned between the two thread guides (23, 24) and draws it in V form. During its return stroke, the thread take-up lever (12) releases the thread to allow the latter to loosen in loop form.
    Type: Grant
    Filed: May 2, 1986
    Date of Patent: August 25, 1987
    Assignee: Maruzen Sewing Machine Co., Ltd.
    Inventors: Yoshio Mikuni, Osamu Tanaka, Kimikazu Matsuda
  • Patent number: 4660482
    Abstract: A thread take-up lever in a sewing machine in which the driving cam disc of the take-up lever is mounted on the crankshaft driving the needle bar up and down. The driving cam disc is supported on one side while the spacing on the other side can be optimally utilized. This enables a correct position of the thread take-up movement.
    Type: Grant
    Filed: January 17, 1986
    Date of Patent: April 28, 1987
    Assignee: Husqvarna Aktiebolag
    Inventor: Kenneth O. E. Skogward
  • Patent number: 4651660
    Abstract: A sewing machine with an automatic threader comprises a threading hook for threading a needle, a thread carrying member for passing a thread through a thread take-up spring, a thread holding device for extending the thread from a thread take-up lever near to the thread eye of the needle so that the threading hook is able to catch the thread, an actuating lever for moving the thread holding device releasably holding the thread near to the needle and making the thread holding device transfer the thread to the threading hook, and an operating member for operating the thread carrying member and the actuating lever. These components of the automatic threader are interlocked with each other so that the thread is extended to the threading hook and is passed through the thread eye of the needle automatically by the single downward stroke of the operating member.
    Type: Grant
    Filed: May 14, 1986
    Date of Patent: March 24, 1987
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Nobuyasu Oshima, Mikio Sato, Katsuhiro Kitajima, Akifumi Nakashima
  • Patent number: 4561368
    Abstract: A thread changing mechanism for sewing machines includes a magazine in which a plurality of needle holders is received, to be positively coupled to the sewing machine needle bar by a vertical motion of the magazine. Upon effecting a coupling, the magazine is retracted into a starting position remote from the needle bar, so that the needle bar with the needle holder can unobstructedly move during the sewing operation. The thread changing mechanism is mounted on a sewing machine as an attachment later, without particular adjustments. When the needle holders are held in the magazine the thread is engaged with each needle and held out of the way of the operating needle thread.
    Type: Grant
    Filed: June 13, 1985
    Date of Patent: December 31, 1985
    Assignee: Pfaff Industriemaschinen GmbH
    Inventor: Erich Willenbacher
  • Patent number: 4546712
    Abstract: A thread changing mechanism for sewing machines includes a magazine in which a plurality of needle holders is received, to be positively coupled to the sewing machine needle bar by a vertical motion of the magazine. Upon effecting a coupling, the magazine is retracted into a starting position remote from the needle bar, so that the needle bar with the needle holder can unobstructedly move during the sewing operation. The thread changing mechanism is mounted on a sewing machine as an attachment later, without particular adjustments. When the needle holders are held in the magazine the thread is engaged with each needle and held out of the way of the operating needle thread.
    Type: Grant
    Filed: March 14, 1984
    Date of Patent: October 15, 1985
    Assignee: Pfaff Industriemaschinen GmbH
    Inventor: Erich Willenbacher
  • Patent number: 4492174
    Abstract: A pneumatic apparatus used in combination with a sewing machine thread take-up mechanism. The apparatus includes a device for directing a stream of air away from the machine's operating components and against the thread passing over the take up mechanism for preventing broken ends or loose thread from becoming entangled with the machine's operating components.
    Type: Grant
    Filed: February 16, 1983
    Date of Patent: January 8, 1985
    Assignee: Union Special Corporation
    Inventor: Juergen Kaufmann
  • Patent number: 4470360
    Abstract: A quilting machine employs bobbin holders which support bobbins each having a conical lower portion ending in a point. A plurality of hooks are driven in an eliptical path to engage and pull down a loop of thread formed by insertion of a needle through a needle plate and the partial withdrawal thereof. The hooks keep the loop open and pull it down so that it passes over the pointed lower end of the bobbin. In order to facilitate engagement of the loop over the bobbin, the bobbins are maintained in sloped fashion. A thread take-up mechanism pulls up the loop of thread with one of the strands of the loop passing behind the bobbin between the bobbin and the bobbin holder to form a lock stitch.
    Type: Grant
    Filed: December 6, 1982
    Date of Patent: September 11, 1984
    Inventor: Leif Gerlach
  • Patent number: 4444138
    Abstract: A sewing machine provided with three selectively operable needle bars and a take-up lever mounted for vertical oscillating movement is provided with a selectively operatable thread clamping device for selectively clamping any two of the three threads associated with the respective needle bars in a stationary position while permitting the third thread to follow the oscillating movement of the take-up lever during reciprocation of the selected needle bar. The thread clamping device is comprised of two flexible plates disposed between two stationary plates secured to the sewing machine arm. The four plates are provided with vertically aligned slots to accomodate the oscillating movement of the take-up lever.
    Type: Grant
    Filed: May 2, 1983
    Date of Patent: April 24, 1984
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventor: Masayuki Yamazawa
  • Patent number: 4373457
    Abstract: A thread feed arrangement particularly suitable for use in an embroidery machine for feeding and tightening a thread includes a drive mechanism for rotating a thread roller in the machine about its axis so as to tighten the thread a desired amount after the thread is formed into a stitch or loop. The drive mechanism is controlled by a control device in corresponding relationship with the formation of the stitch or loop, such as by a punched card control system which controls the entire operation of the machine. When using the feed arrangement, thread breakage is significantly reduced and a substantial number of commonly used reciprocating machine parts such as thread guides are no longer required.
    Type: Grant
    Filed: February 20, 1980
    Date of Patent: February 15, 1983
    Inventor: August Heinzle
  • Patent number: 4295433
    Abstract: An apparatus for the drive of the thread take-up on multi-head embroidery machines with at least one embroidery needle in each head, with which the thread take-up comprises a thread take-up lever, which thread take-up lever is mounted on the embroidery head pivotable back and forth about a horizontal axis and is driven by the machine main shaft. The thread take-up levers of all embroidery heads are secured on a common thread take-up shaft, the latter extending over the entire length of the machine. The thread take-up shaft is driven by a crankdrive mechanism from the main shaft of the machine.
    Type: Grant
    Filed: August 6, 1979
    Date of Patent: October 20, 1981
    Assignee: Maschinenfabrik Carl Zangs Aktiengesellschaft
    Inventors: Alfred Desprez, Heinz Sauerland, Wolfgang Teetz
  • Patent number: 4215641
    Abstract: A sewing machine is provided with an actuator controlled thread take-up lever. A microprocessor is programmed to provide signals for controlling the actuator to provide a system wherein the interaction of the needle, the needle thread take-up and needle thread tension are optimally controlled. A thread metering mechanism, also under microprocessor control, is included in the system.
    Type: Grant
    Filed: July 5, 1979
    Date of Patent: August 5, 1980
    Assignee: The Singer Company
    Inventors: Leo Dobrjanskyj, Donald R. Simon
  • Patent number: 4070976
    Abstract: Disclosed is an improved upper thread take-up lever for a two-thread sewing machine. The improvement comprises at least one vertically disposed pulley rotatably supported adjacent to the free end of the lever and a member secured to the free end of the lever for supporting the pulley rotatably in unison with another vertically disposed pulley in the vicinity of a tension disc.
    Type: Grant
    Filed: February 1, 1977
    Date of Patent: January 31, 1978
    Inventor: Bunsaku Taketomi