Textiles: spinning – twisting – and twining – Apparatus and processes – Elements
Patent
1996-05-16
1999-03-16
Stryjewski, William
Textiles: spinning, twisting, and twining
Apparatus and processes
Elements
57 75, 57137, D01H 764
Patent
active
058815465
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to spinning rings for winding yarns fed from yarn feeders on bobbins,
BACKGROUND OF THE INVENTION
Among prior art spinning rings of the pertaining type is one which comprises a stationary ring, a rotary ring and a traveler.
The stationary ring is secured to a base member.
The rotary ring Is disposed inside and concentrically with the stationary ring for rotation about the central axis thereof. The bobbin is disposed inside and concentrically with the rotary ring for rotation about the central axis thereof.
The traveler is provided on the rotary ring for revolution in the circumferential direction of the rotary ring to guide the yarn fed from the yarn feeder to the bobbin.
With the rotation of the bobbin, the traveler undergoes revolution along the edge of outer periphery of the rotary ring in the circumferential direction thereof, so that the yarn fed from the yarn feeder is taken up on the bobbin while being twisted. When the traveler is caused to undergo revolution, the rotary ring is caused to be rotated.
The yarn (raw yarn) fed from the yarn feeder is thus spun and taken up on the bobbin.
The higher the rotation speed of the bobbin, the better the spinning efficiency.
The rotation of the bobbin and the revolution of the traveler correspond to each other, and also the revolution of the traveler and the rotation of the rotary ring are related to each other.
It is, accordingly, an object of the invention to improve the spinning efficiency by improving the revolution of the traveler and the revolution of the rotary ring.
DISCLOSURE OF THE INVENTION
The invention features, in its first aspect, a spinning ring for winding a yarn fed from a yarn feeder on a bobbin, which comprises a stationary ring mounted on a base member, a rotary ring disposed inside and concentrically with the stationary ring for rotation about the central axis thereof, the bobbin being disposed inside and concentrically with the rotary ring for rotation about the central axis thereof, and a traveler disposed on the rotary ring for revolution in the circumferential direction of the rotary ring to guide the yarn fed from the yarn feeder with respect to the bobbin, wherein when the bobbin is rotated substantially at normal operating speed. The speed of the traveler relative to the rotary ring is substantially zero, so that the traveler and the rotary ring are rotated substantially in unison with each other relative to the stationary ring.
When the bobbin starts to be rotated (i.e., accelerated), the traveler is caused to undergo revolution relative to the stationary ring, so that the rotary ring is caused to start rotation gradually relative to the stationary ring. When the bobbin reaches the normal operating speed (but not always right after the normal operating speed is reached), the rotary ring is rotated at a speed corresponding to the rotational speed of the bobbin to make substantially zero the speed of revolution of the traveler relative to the rotary ring. Consequently, the traveler and the rotary ring are rotated substantially in unison with each other relative to the stationary ring.
In this state, the traveler no longer receives substantial frictional force due to its rotation relative to the rotary ring. The burden (i.e., degree of damage) of the traveler is reduced, so that its life can be extended. In addition, the speed of rotation of the bobbin can be increased to obtain improved production efficiency.
The invention also features, in its second aspect, a spinning ring for winding a yarn fed from a yarn feeder on a bobbin, which comprises a stationary ring mounted on a base member, a rotary ring disposed inside and concentrically with the stationary ring for rotation about the central axis thereof, the bobbin being disposed inside and concentrically with the rotary ring for rotation about the central axis thereof, and a traveler disposed on the rotary ring for revolution in the circumferential direction of the rotary ring to guide the yarn fed from the yarn feeder with resp
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Nippo Ltd
Stryjewski William
LandOfFree
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