Sewing or embroidering machine with a thread-cutting device

Details Sewing or embroidering machine with a thread-cutting device Sewing or embroidering machine with a thread-cutting device

1997-04-17

1998-06-30

Nerbun, Peter

Sewing

Special machines

Pattern controlled or programmed

112300, D05B 1900, D05B 6500

Patent

active

057718288

ABSTRACT:
A sewing or embroidering machine is provided with a thread-cutting device and a signal transmitter representing the angular position of the arm shaft. The drive of the catch thread device is acted upon as a function of the signals generated by the signal transmitter according to a movement program stored in a memory. The path data of this movement program are in a defined relation to the rotary movement or the current angular position of the hook. The drive of the catch thread device is part of a regulating device operating as a cascade control or of a control device operating as a path plan control. Due to the exact agreement in time between the movement process of the catch thread device and the course of the rotary movement of the hook, the thread-cutting process can now also be carried out during the phase of deceleration of the sewing machine, so that an inexpensive, uncontrolled motor can now be used to drive the sewing machine.

REFERENCES:
patent: 3359933 (1967-12-01), Bono
patent: 5133272 (1992-07-01), Hayashi
patent: 5474001 (1995-12-01), Tajima et al.

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