Fabric take-up apparatus

Details Fabric take-up apparatus Fabric take-up apparatus

2003-01-21

2003-10-28

Worrell, Danny (Department: 3765)

Textiles: knitting

Fabric manipulation

Take-ups

Reexamination Certificate

active

06637241

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to an improved fabric take-up apparatus adopted on an elevated take-up apparatus of a large capacity for preventing the fabric from being thrown away during fabric rolling and obtaining integrated and tubular fabric rolls.
BACKGROUND OF THE INVENTION
For the finished knitting fabrics from conventional knitting machines, a take-up apparatus generally is used to wind the fabrics in tubular rolls. The take-up apparatus may be grouped in two types: one type can wind the fabric in a roll at a diameter about 20 inches. Because of its small capacity, it is not widely used nowadays. Another type can form fabric rolls at a diameter up to about 46 inches. As it has a greater capacity, it is widely used now.
When the elevated take-up apparatus with a greater capacity is in use for rolling the fabric and has reached a diameter of 25 inches, the weight occurred to the rolling bar increases. As the conventional take-up apparatus use belts to transmit power, idle running is prone to occur between the transmission wheel of the rolling bar and the belt. As a result, the rolling bar cannot rotate smoothly to take up the remaining fabric, and machine malfunction frequently occurs.
To remedy the aforesaid problems, some producers use chains to replace the conventional belts. For instance, U.S. Pat. No. 5,649,435 discloses a circular knitting machine with replaceable knitting head that has a chain to perform initial transmission for rolling the fabric. The fabric is rolled by a frictional approach. When the fabric roll reaches the diameter of 25 inches (the fabric wound on the rolling bar becomes heavy), the transmission through the chain can be maintained without idle running, thus the fabric may be rolled continuously. In that patent, when the fabric is rolled and gradually increases, the rolling bar is moved upwards gradually along a guiding channel until the diameter of the fabric roll reaches about 46 inches. However, when the rotating speed of the rolling bar increases, the centrifugal force also increases. Moreover, the fabric is pliable and the rolling bar tends to occur wobbling and results in uneven fabric rolling (not uniform friction), and the fabric is prone to be thrown away. Furthermore, during fabric rolling, if the fabric has knitting floats, the floats will be destroyed (due to the heavy weight of the fabric). Thus such type of elevated fabric rolling apparatus with a large capacity is not suitable for rolling high quality fabrics, and can only be used for rolling general industrial fabrics.
SUMMARY OF THE INVENTION
The primary object of the invention is to resolve the aforesaid disadvantages. The elevated fabric take-up apparatus of a large capacity of the invention aims to prevent the fabric from being thrown away during rolling process and avoid the fabric from being damaged (due to the fabric is not being pressed on the friction bar) so that it can be used to roll any type of fabrics without restrictions.
In order to achieve the foregoing object, the fabric take-up apparatus of the invention includes a frame, a conveying mechanism located in the frame, a take-up mechanism located in the frame, at least one friction mechanism located in the frame between the conveying mechanism and the take-up mechanism, a balancing weight mechanism located on two sides of the frame, a speed changing mechanism located at a lower section of the frame and a stop mechanism located in the frame. The conveying mechanism transports the fabric to the take-up mechanism for rolling. The fabric is rolled until the diameter of the roll increases to contact the friction bar of the friction mechanism, then the friction bar aids the take-up mechanism to roll the fabric. Meanwhile, the friction mechanism is towed by the balancing weight mechanism. Thus the friction bar and the rolling fabric can be prevented from being thrown away during the rolling process.


REFERENCES:
patent: 5649435 (1997-07-01), Bryant

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