Clamping device for a sewing machine

Details Clamping device for a sewing machine Clamping device for a sewing machine

1994-02-15

1997-02-18

Lewis, Paul C.

Sewing

Special machines

Positionable work carrier

11247006, 11247507, 11247509, 112113, 112114, 112DIG2, D05B 2100, D05B 322

Patent

active

056032749

ABSTRACT:
A clamping device for use in a sewing machine. The clamping device includes a clamping plate having a downwardly facing clamping surface for clamping a first workpiece to a sewing surface of a sewing machine wherein the clamping plate is supported for vertical movement beneath a sewing head for the sewing machine. The clamping plate is provided with a vacuum aperture which is in fluid connection with a vacuum source wherein the vacuum source draws a second workpiece into engagement with the clamping plate. A support plate is provided for supporting the second workpiece beneath the clamping plate and a feed mechanism is provided for feeding the second workpiece onto the support plate. In operation of the present invention, the feed mechanism feeds one of the second workpieces onto the support plate and the vacuum source is actuated to create a vacuum at the downwardly facing clamping surface of the clamping plate to thereby move the second workpiece from the support plate into engagement with the clamping plate. Thereafter, the clamping plate is moved downwardly into engagement with the first workpiece to thereby clamp the first and second workpieces together for a sewing operation.

REFERENCES:
patent: 1408474 (1922-03-01), Russell
patent: 4411721 (1983-10-01), Wishart
patent: 4485754 (1984-12-01), MacDonald
patent: 4498404 (1985-02-01), Sadeh
patent: 4590872 (1986-05-01), Bray
patent: 4714034 (1987-12-01), Riss et al.
patent: 4756261 (1988-07-01), Gershoni
patent: 4790523 (1988-12-01), Tomer
patent: 5052316 (1991-10-01), Sakakibara
MIM Industries, Inc., "the technologies of MIM industries, inc.", published approximately Jan. 1, 1990, p. 56.

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