| US 7,536,964 B2 | ||
| Sewing machine | ||
| Kazuya Sadasue, Tokyo (Japan) | ||
| Assigned to Juki Corporation, Tokyo (Japan) | ||
| Filed on Mar. 26, 2008, as Appl. No. 12/55,749. | ||
| Claims priority of application No. 2007-082280 (JP), filed on Mar. 27, 2007. | ||
| Prior Publication US 2008/0236466 A1, Oct. 02, 2008 | ||
| Int. Cl. D05B 57/02 (2006.01); D05B 57/30 (2006.01) | ||
| U.S. Cl. 112—302 [112/199] | 7 Claims |
| 1. A sewing machine comprising:
an upper looper formed with a thread hole at a tip portion thereof and disposed so as to be oscillatable;
an upper looper shaft which oscillates the upper looper between an upper position and a lower position;
switching means disposed in relation to the upper looper and the upper looper shaft such that the switching means is operable
to switch a coupled state and a decoupled state between the upper looper and the upper looper shaft;
moving means for moving the upper looper, which has been decoupled from the upper looper shaft by the switching means, to
the lower position;
a thread guiding pipe formed with a thread path through which an upper looper thread is insertable and having a thread discharging
port, the thread guiding pipe being movable between a position, at which the thread discharging port is aligned with the thread
hole of the upper looper in the lower position, and another position, at which the thread discharging port is moved away from
the thread hole; and
first operating means operable to decouple the upper looper and the upper looper shaft via the switching means, and to move
the thread discharging port of the thread guiding pipe to the position at which the thread discharging port is aligned with
the thread hole of the upper looper in the lower position.
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