Sewing – Special machines – Positionable work carrier
Patent
1995-09-05
1997-03-18
Lewis, Paul C.
Sewing
Special machines
Positionable work carrier
D05B 2100
Patent
active
056112939
ABSTRACT:
A sewing machine including a needle holding device which holds a sewing needle, a sheet holding device which holds one or more work sheets, and a moving device which moves the sheet holding device relative to the needle holding device, the moving device including a drive source which produces a drive force, one or more cylindrical cams which are connected to the drive source and each of which is rotatable about an axis line by being driven by the drive source, each cylindrical cam having a pair of opposite spiral cam surfaces formed on an outer circumferential surface thereof, and one or more cam followers which are connected to the sheet holding device and each of which is engaged with the spiral cam surfaces of a corresponding cylindrical cam such that the cam follower is movable along the cam surfaces and is substantially immovable in directions perpendicular to the cam surfaces, the cam follower being moved in a drive-force transmitting direction substantially parallel to the axis line of the cylindrical cam when the cam is rotated by the drive source, so that the cam follower transmits the drive force of the drive source to the sheet holding device.
REFERENCES:
patent: 4103632 (1978-08-01), Bowles
patent: 4131075 (1978-12-01), Wurst
patent: 4167912 (1979-09-01), Sedlatschek et al.
patent: 4176561 (1979-12-01), Davidson
patent: 4391211 (1983-07-01), Yamamoto et al.
patent: 4455956 (1984-06-01), Yamamoto et al.
patent: 4563960 (1986-01-01), Albrecht
patent: 4602578 (1986-07-01), Yokoe et al.
patent: 5018462 (1991-05-01), Brocklehurst
Kurahashi Yoichi
Mitsui Hiroyuki
Nomura Etuzo
Oya Shiro
Tagawa Yuji
Brother Kogyo Kabushiki Kaisha
Lewis Paul C.
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