Rotary Patents (Class 112/189)
  • Patent number: 9016218
    Abstract: To provide a sewing machine that can control tension on a needle thread and tension on a bobbin thread on a per-stitch basis; that enables even heads of a multi-head embroidery sewing machine to form an identical embroidery; and that enables even a plurality of sewing machines to form identical embroidery. A memory device stores for each stitch of embroidery data a needle thread control torque value and a bobbin thread control torque value. In a needle thread torque control zone, an upstream grip section main body is closed, and a downstream grip section main body is opened. A needle thread motor is subjected to torque control in accordance with the needle thread control torque value. In the meantime, in a position control zone, the upstream grip section body is opened, and the downstream grip section body is closed, thereby subjecting the needle thread motor to position control.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: April 28, 2015
    Assignee: NSD Corporation
    Inventors: Mitsuhiro Fujiura, Hirotsugu Uenishi, Yoshichika Takizawa, Tatsuhiro Kurashima, Masayoshi Ono
  • Patent number: 7891307
    Abstract: A sewing thread (20) can be captured certainly with a thread capturing open eye (13a) of an open eye needle (13) and the stitches are formed in the inner space of a sewing machine bed (3). A handstitch and a locked stitch are formed, respectively, on the front surface and the back surface of a fabric workpiece (21) as a skip stitch set through cooperation of the open eye needle (13), a shuttle hook (200) and a thread draw out actuator (401). A feed dog (601) feeds the fabric workpiece by a stitch length (P1) for handstitch during a first stroke of the open eye needle (13), and feeds the fabric workpiece by an inter-stitch pitch (P2) between the handstitches during a second stroke of the open eye needle (13).
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: February 22, 2011
    Assignee: Suzuki Manufacturing, Ltd.
    Inventors: Kouichi Sakuma, Tohru Sakuma
  • Publication number: 20030172859
    Abstract: Disclosed is a rotary shuttle device for a sewing machine, in which an outer shuttle is comprised of three separate constructing elements so that only an excessively worn portion or a portion that requires replacement is selectively replaced.
    Type: Application
    Filed: December 31, 2002
    Publication date: September 18, 2003
    Inventor: Steve Chang