FIELD OF THE INVENTION
The present invention relates to the sliver coiler of the textile machine such as card, comber and draw frame. More particularly, the present invention relates to a sensing arrangement provided at the coiler plate zone of a sliver delivering textile machine to prevent the excessive filling of the sliver cans in the textile machines employing manual doffing of sliver cans. More particularly, the present invention relates to an apparatus in the sliver coiler of a textile machine.
BACKGROUND ART
The usage of can coiler in the textile spinning preparation machine such as card, comber and Draw frames, for depositing the sliver gently into the sliver can to facilitate processing by the machine arranged downstream is known. Normally the cans are kept over a revolving table and rotated at a pre-determined speed by the drive system of the textile machine. Like wise the coiler comprising the sliver canal and a bottom surface which constantly rubs the top layers of the slivers deposited in the sliver can is also rotated at a pre-determined speed by the drive system of the textile machine. When the sliver can is filled with pre-determined length of sliver, then the sliver has to be cut and the filled can is to be replaced with an empty one, which is an essential process in the can changing mechanisms. This process is automatically taking place in modern machines, which are equipped with automatic can changers.
In the cases where the automatic can changers are not used, the filled can is to be replaced with an empty can manually.
The machines which are not provided with automatic can changing arrangement essentially equipped with length counters provided with means for setting the required length of sliver material to be filled in the sliver cans. Soon after the pre¬determined length of sliver is deposited in the sliver can these counters in conjunction with the control system of the machine automatically stops the

delivery of sliver to the sliver can and the machine operative is prompted for effecting the can change by signal arrangement. The machine operative replaces the filled can present underneath the can coiler with an empty can and restarts the machine.
In manual doffing, the problem arises when the operator forgets to replace the filled can with empty can. In such case, the sliver gets filled above the permissible level resulting in lifting the coiler plate and damage to the elements of the machine. Further the processed sliver will go waste. Though safety mechanism to avoid the overfilling of slivers in the can by lifting the coiler plate and stopping the machine is provided, the damage is already caused to the machine elements. Accidentally if the operator resets the length counter and restarts the machine without replacing the full can with empty can, the sliver fills in the same can and here also the situation of over filling of sliver can occurs.
For the foregoing reasons, there is a need for a device that has the ability to eliminate the possibility of restarting the machine without replacing the filled cans with empty one and to prevent the machine from delivering sliver after the sliver can present under the coiler is already filled with the pre-determined length of sliver.
SUMMARY OF THE INVENTION
The present invention is directed to a device that satisfies this need to provide safety device which will eliminate the possibility of restarting the machine without replacing the filled cans with empty one and that prevents the machine from delivering sliver after the sliver can present under the coiler is already filled with the pre-determined length of sliver.

It is an object of the present invention to provide safety device which will eliminate the possibility of restarting the machine without replacing the filled cans with empty one.
It is another object of the present invention to provide a safety device to prevent the machine from delivering sliver after the sliver can present under the coiler is already filled with the pre-determined length of sliver.
It is yet another object of the present invention to provide a safety device, which will eliminate the damages caused to the machine elements due to over filling of the sliver can.
The present invention provides an improved sliver delivering textile machine of the type having a sliver can, can plate, collecting plate, can coiler, a counter to monitor the length of the sliver to be placed by the can coiler, wherein the improvement comprises a sensing component and control system. The sensing component is arranged at a radial distance from the axis of the can coiler in the region between the top surface of the collecting plate of the sliver can and the bottom surface of the can coiler and is connected to the control system of the said textile machine.
The present invention relates to an apparatus in the sliver coiler of a textile machine provided with improvements to ensure the replacement of the full can with an empty can after the sliver can present under the coiler is already filled with the pre-determined length of sliver comprises a sliver can (1) mounted on the can plate (2) provided with spring loaded collecting plate (6), a can coiler (3) arranged coaxial to the can plate (2) and located at a pre-determined axial distance from the top surface of the collecting plate of the empty can, the can plate (2) and the coiler (3) being driven by the drive system of the textile machine and a counter provided to monitor the length of the sliver (4) to be delivered by the can coiler (3), wherein the improvement comprises a sensor (5) and a control system.

The sensing component senses the deposition of sliver by the can coiler through the gap when the sliver material is filled in the empty can. The sensing component stops sensing when the gap between the top surface of the collecting plate and the bottom surface of the can coiler is filled with slivei- material. The operator replaces the filled sliver can with an empty sliver can when the device stops and resets the counter. The sensing material is activated when the device is restarted after resetting the counter and the sensing material starts sensing the deposition of the sliver material.
Further, the control system switches off the device when the device is reset and switched on without replacing the filled sliver can with an empty sliver can.
BRIEF DESCRIPTION OF THE DRAWING
Figure 1 of the drawing schematically illustrates the arrangement according to the invention.
DESCRIPTION OF THE INVENTION
Various embodiments of the present invention will now be explained with reference to the accompanying drawing. However, it will apparent to a person ordinarily skilled in the art that the disclosed embodiments are merely exemplary-, which may be embodied in various forms. The following description and drawings are not to be construed as limiting. Numerous specific details are described to provide a thorough understanding of the present invention, as the basis for the claims and as a basis for teaching one skilled in the art how to make and/or use the invention. However, in certain instances, well-known or conventional details may not be described in order to maintain clarity.
The present invention is directed to an improved sliver delivering textile machine of the type having a sliver can, can plate, collecting plate, can coiler, a counter to

monitor the length of the sliver to be placed by the can coiler, wherein the improvement comprises a sensing component and control system.
The sliver can (1) is positioned on the can plate (2) present underneath the can coiler (3), The sliver can (1) comprises a collecting plate (6), which is held by a spring (7) positioned inside the sliver can (1). The can coiler (3) and the can plate (2) are operably connected to the drive system of the textile machine and capable of being revolved at the pre-determined speed. A counter is provided to monitor the length of the sliver (4) to be placed by the can coiler (3) into the sliver can (1) and provided with means for setting the required length of sliver that is to be deposited in to the sliver can (1) and connected to the control system of the textile machine. Further a sensing arrangement comprising sensor (5), which may be for example a photo sensor, is arranged at a radial distance from the axis of the can coiler (3) in the region between the top surface of the collecting plate (6) of the sliver can (1) and the bottom surface of the can coiler (3) and connected to the control system of the textile machine. The sensor (5) of the sensing arrangement provided is capable of sensing the delivery of the sliver (4) by the can coiler (3).
Normally there will be a pre-determined gap {D) between the bottom of the can coiler (3) and of the top surface of the collecting plate (6) of the sliver can (1). This gap (D) will be filled by the coils of sliver during the can filling process.
During the time when a empty can (1) is being filled with sliver material the sensor (5) will be able to sense the deposition of the sliver (4) by the can coiler {3) through the gap (D). After few minutes of filling of the replaced empty can, the sliver coils deposited over the collecting plate (6) of the sliver can (1) are held against the bottom surface of the can coiler (3) by pre-determined spring force exerted by the spring (7) arranged in the sliver cans (1) and there will be no gap between the top surface of the collecting plate (6) and the bottom surface of the can coiler (3) and the sensor (5) will be no longer able to sense the deposition of the sliver through the gap (D). The sensor (5) will be activated only for a pre¬determined brief period after the restarting of the machine - subsequent to re-

setting of the counter and will monitor the deposition of initial few turns of coiler that are being deposited in the sliver can (1).
A pre-determined value of length is set in the counter first and the sliver being delivered from the can coiler (3) is allowed to fill in the can (1). Soon after the pre¬determined length of the sliver (4) is deposited in the sliver can (1) the control system of the textile machine stops the machine and the operator replace the filled can with an empty can and the counter is reset.
At the time when the machine is restarted after resetting the counter, the sensor (5) is also activated for a brief time interval, which sense the deposition of initial few turns of coiier that are being deposited in the sliver can (1) through the gap (D) and the machine is allowed to continue working by the control system of the textile machine.
On the other hand, if the counter is reset and the machine is switched on without replacing the full can with an empty can, the sensor (5) is unable to sense the deposition of the sliver (4) by the can coiler (3) through the gap (D) and the machine is switched off by the control system of the textile machine.
This arrangement prevents the over filling of the can and the subsequent damage to the machine elements associated with the can coiler and can plate.
Although the present invention has been fully described in connection with the preferred embodiments thereof with reference to the accompanying drawings, it is to be noted that various changes and modifications are possible and are apparent to those skilled in the art. Such changes and modifications are to be understood as included within the scope of the present invention as defined by the appended claims unless they depart there from.

We Claim
1. An apparatus in the sliver coiler of a textile machine provided with improvements to ensure the replacement of the full can with an empty can after the sliver can present under the coiler is already filled with the pre determined length of sliver comprises a sliver can (1) mounted on the can plate (2) provided with spring loaded collecting plate (6), a can coiler (3) arranged coaxial to the can plate (2) and located at a pre determined axial distance from the top surface of the collecting plate of the empty can, the can plate (2) and the coiler (3) being driven by the drive system of the textile machine and a counter provided to monitor the length of the sliver (4) to be delivered by the can coiler (3), wherein the improvement comprises a sensor (5) and a control system .
2. An apparatus in the sliver coiler of a textile machine as claimed in claim 1, wherein sensor (5) is provided to sense the deposition of the initial layers of the sliver on the empty can.
3. An apparatus in the sliver coiler of a textile machine as claimed in claim 1 and 2, wherein the sensor (5) is arranged at a radial distance from the axis of the can coiler (3) in the region between the top surface of the collecting plate (6) of the sliver can (1) and the bottom surface of the can coiler (3).
4. An apparatus in the sliver coiler of a textile machine as claimed in claim 1 to 3, wherein the sensor (5) is connected to the control system of the said textile machine.
5. An apparatus in the sliver coiler of a textile machine as claimed in claim 1, wherein the control system is connected to the counter of the said textile machine.

6. An apparatus in the sliver coiler of a textile machine as claimed in claim 1,
wherein the sensor (5) senses the delivery and deposition of sliver on the
collecting plate (6) of the empty can for a predetermined period after
resetting the counter of the said textile machine.
7. An apparatus in the sliver coiler of a textile machine substantially described
particularly with reference to the accompanying drawings.