Metering device for sewing machines
AssigneeUnion Special Corporation
InventorsWolf-Rudiger von-Hagen, Horst Pordzik
Life of this patent
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Abstract
A tape feed device for an elastic tape from a supply at a sewing machine having a biased actuating lever, whose angular position varies in dependence upon the size of a loop and which controls the motor of a take-off roller. An adjuster, which is electrically actuable in a controlled manner, acts on the actuating lever in such a way that the tape tension can be altered in accordance with an electrical variable. The adjuster has a coil whose electromagnetic field lines cut an armature which is connected to the actuating lever.
Claims5
A tape feed device for feeding an elastic tape from a supply at a sewing machine for the controlled change in the tension of the tape, comprising:
- an adjusting device having at least one motor-driven take-off roller for the tape,
- a biased actuating lever having thereon a roller which engages a loop of the tape,
- a switch with which the actuating lever co-operates in accordance with the angular position of said actuating lever, which is dependent upon the size of the loop, and
- an adjuster for the adjusting device, said adjustor being electrically actuable in a controlled manner and acting on the actuating lever in such a way that the tension in the tape can be altered in accordance with an electrical variable,
- in which the tension in the tape is varied in stages which are adjustable by a coder switch, and in which said stages for increasing tension in the tape are evaluatable by a comparator, whereby the movement of the motor-driven take-off roller can be reversed.
A tape feed device for feeding an elastic tape from a supply at a sewing machine for the controlled change in the tension of the tape, comprising:
- an adjusting device having at least one motor-driven take-off roller for the tape,
- a biased actuating lever having thereon a roller which engages a loop of the tape,
- a switch with which the actuating lever co-operates in accordance with the angular position of said actuating lever, which is dependent upon the size of the loop, and
- an adjuster for the adjusting device, said adjustor being electrically actuable in a controlled manner and acting on the actuating lever in such a way that the tension in the tape can be altered in accordance with an electrical variable,
- in which the tension in the tape is steplessly adjustable by means of a potentiometer.
A tape feed device for feeding an elastic tape in a sewing machine, comprising:
- an adjusting means having a take-off roller for the tape;
- means for driving said take-off roller;
- an actuating lever having means for engaging a loop of the tape;
- means for driving said actuating lever;
- switch means responsive to said actuating lever;
- an adjuster having an armature for driving said actuating lever, thereby modifying the position of the actuating lever;
- electric means for actuating said adjuster responsive to an electrical variable, and
- a coder switch for adjusting the tension of the tape in stages.
A tape feed device for feeding an elastic tape in a sewing machine, comprising:
- an adjusting means having a take-off roller for the tape;
- means for driving said take-off roller;
- an actuating lever having means for engaging a loop of the tape;
- means for driving said actuating lever;
- switch means responsive to said actuating lever;
- an adjuster having an armature for driving said actuating lever, thereby modifying the position of the actuating lever;
- electric means for actuating said adjuster responsive to an electrical variable, and
- a potentiometer for adjusting the tension of the tape.
Dependencies are inferred from the claim text.