Sewing machine

Details Sewing machine Sewing machine

2007-01-16

2007-01-16

Worrell, Danny (Department: 3765)

Sewing

Elements

Presser devices

Reexamination Certificate

active

11284851

ABSTRACT:
The sewing machine includes a presser foot that is lowered to press a workpiece cloth; a presser foot lifting lever operating the presser foot; a thread tension mechanism including a thread tension regulator capable of adjusting the thread tension of a needle thread and opening the thread tension regulator based on the lifting operation of the presser foot lifting lever; and a thread guide groove guiding the needle thread at least to the thread tension mechanism, upon carrying out the thread hooking work. The sewing machine further includes a detector detecting a lifting operation of the presser foot lifting lever; a covering member which is movable between a closed position where the covering member covers at least a part of the thread guide groove and an opened position where the covering member opens the thread guide groove. The covering member is moved to the closed position when the presser foot is in a lowered state. An actuator moves the covering member at least from the closed position to the opened position. A controller controls the actuator so that the covering member is moved to the opened position when the detector detects the lifting operation of the presser foot lifting lever.

REFERENCES:
patent: 3602169 (1971-08-01), Miller et al.
patent: 3960098 (1976-06-01), Papajewski et al.
patent: 4364319 (1982-12-01), Niehaus et al.
patent: 5080031 (1992-01-01), Suzuki et al.
patent: 6968794 (2005-11-01), Price et al.
patent: U-02-130574 (1990-10-01), None
patent: A-06-079079 (1994-03-01), None
patent: A-06-134165 (1994-05-01), None
patent: Y2-02-588723 (1998-11-01), None

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