BIASING MECHANISM FOR SEWING MACHINE PRESSER FOOT

WIPO Patent Application WO2004106609

A3

A sewing machine (10a) comprises a presser foot (12); a drive shaft (20) operably connected to the presser foot (12) which imparts periodic upward movement to the presser foot (12); and a biasing mechanism operably connected to the presser foot (12) which normally biases the presser foot (12) into a downward position, the biasing mechanism comprising a toggle link having a pivot (32), a resilient element (36) operably connected to the toggle link (30) on one side of the pivot (32) and the presser foot (12) operably connected to the toggle link (30) on the other side of the pivot (32). In another embodiment, a sewing machine (10b) comprises a presser foot (12); a drive shaft (20) operably connected to the presser foot (12) which imparts periodic upward movement to the presser foot (12); and a biasing mechanism operably connected to the presser foot (12) which normally biases the presser foot (12) into a downward position, the biasing mechanism having a preload force therein when the presser foot (12) is in a lowermost position; the presser foot (12) being selectively raisable without increasing the preload force of the biasing mechanism.

WO/1989/001067	SEWING MACHINE WITH TOP TRANSPORT DEVICE
JPS589560	[Title of the device] Cloth control of a ball top stitching sewing machine

MARCANGELO STEVEN (US)
SIGOUIN JOHN L (US)

PCT/US2004/015888

February 17, 2005

May 20, 2004

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L & P PROPERTY MANAGEMENT CO (US)
MARCANGELO STEVEN (US)
SIGOUIN JOHN L (US)

D05B27/04; D05B29/02; (IPC1-7): D05B27/04; D05B29/02

US4285289A	1981-08-25
US5309854A	1994-05-10
US4706587A	1987-11-17
US20020062774A1	2002-05-30

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