Presser foot actuating device

Details Presser foot actuating device Presser foot actuating device

1998-06-30

1999-10-05

Izaguirre, Ismael

Sewing

Elements

Presser devices

D05B 2902

Patent

active

059607300

ABSTRACT:
An actuating device (54) for lifting the presser foot (53) of a sewing machine. A piston (14) having a piston rod (15) is supported on the bearing (13) which guides the presser foot support rod (18). The presser foot support rod (18) is biased against the sewing material by a spring (40). The piston (14) is surrounded by a cylinder (26). The piston (14) with the piston rod (15) and the cylinder (26) form a piston-cylinder drive for actuation by compressed air, to urge the piston rod (15) against the force of the spring (40) and thereby lift the presser foot (53) off of the sewing material. The actuating device (54) has two set screws (42, 45) which respectively control the spring force acting on the presser foot and the distance the presser foot is raised by the actuating device. Two embodiments are described.

REFERENCES:
patent: 4024826 (1977-05-01), Knight et al.
patent: 4658752 (1987-04-01), Keilmann et al.
patent: 4981094 (1991-01-01), Stapel et al.
patent: 5138962 (1992-08-01), Klundt
patent: 5540163 (1996-07-01), Reinhart et al.
Pneumatic Cylinder Catalog (Pneumatic Main Catalog), 22nd Edition, p. 1.211-3, FESTO Pneumatic Esslingen.

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