US 7,448,336 B2
	Driving arrangement for the drive elements for threading the upper thread into the eye of the needle of a sewing machine
Niklaus Wacker, Steckborn (Switzerland); and Livio Selm, Berg (Switzerland)
Assigned to Fritz Gegauf AG, Steckborn (Switzerland)
Filed on Feb. 28, 2007, as Appl. No. 11/679,970.
Claims priority of application No. 00354/06 (CH), filed on Mar. 03, 2006.
Prior Publication US 2007/0204776 A1, Sep. 06, 2007
Int. Cl. D05B 87/02 (2006.01); D05B 55/14 (2006.01)

U.S. Cl. 112—225

7 Claims

1. A drive arrangement for drive elements for threading an upper thread into an eye (19) of a needle (17) of a sewing machine (1), comprising a needle rod (21) carrying the needle (17), a needle rod actuator (47), which can be coupled to and decoupled from the needle rod (21), a presser foot (25) on a presser foot rod (23), the presser foot (25) is movable from a resting into an operating position via a lifter lever and has an additional pressure device driven by an electric motor, a lifting drive for a threader (11) arranged to be vertically displaceable, and a threading hook (55) arranged at a lower end of a threader (31) and pivotable around a vertical axis, the threader (11) is lowerable for the threading process by a connection to the needle rod actuator (47) when the needle rod actuator is decoupled from the needle rod (21).