DESC:COMPLETE SPECIFICATION

TITLE

[0001] A Device for Detecting Missing Feed Material in a Ring Frame where more than One Feed Material is used for Producing Yarn

CROSS-REFERENCE TO RELATED APPLICATION

[0002] The present application claims priority from the Provisional Application No. 201641034798 filed on 12th Oct 2016, the full disclosure of which is hereby incorporated by reference herein.

PRIORITY CLAIM

[0003] This application for complete specification claims priority from the provisional application No. 201641034798 for the same invention titled A Device for Detecting Missing Feed Material in a Ring Frame where more than One Feed Material is used for Producing Yarn

FIELD OF THE INVENTION

[0004] The present invention relates to a device for the detection of a missing or broken feed material and stops the remaining feed materials in a ring spinning machine with more than one feed material arranged for producing yarn in one production position.

BACKGROUND OF THE INVENTION

[0005] Generally, in Ring frames the feed material is passed through the drafting system and drafted material is twisted and wound on bobbin as yarn. In case if the yarn is broken, the delivery of drafted material continues and the same is collected as pneumafil waste through suction. To save such material, Roving stop motion systems are available.

[0006] In earlier systems, if there is a yarn breakage, the individual position sensor will sense and give feed back to the feed material stop motion device for stopping the feed material thereby avoiding feed material moving to the waste box.

[0007] The existence of the above prior art is for ring frames having the configuration of one feed material supplied for one yarn production position.

[0008] There are some special spinning techniques available wherein more than one feed material is used to produce yarn for one production position. This may be required to produce some special yarns.

[0009] In such machines, it is essential that more than one feed material is used for producing yarn. In case if one or more of the multiple feed material breaks but not all, the possibility exists for continuous production of yarn. Such yarns will not meet the yarn quality specifications produced by more than one feed materials.

[0010] US 4763467 - This patent discloses stopping the feed of roving in a spinning machine when a yarn break is detected. The technology disclosed in this patent is based on a component called actuate stop member which is rotatably mounted on one of the drafting rolls. The stop member rotates and dispositions the opposing rolls to separate the rolls which stops the roving feed.

[0011] US 4972667 - This patent discloses stopping the feed of roving when a yarn break is detected. The technology disclosed in this patent is also based on a component called slubbing guide element which contacts the inlet roll of the drafting system, and raises it. This results in stopping of feed material.

[0012] US 4951357 - This patent disclosed stopping the feed of roving when a yarn break is detected. The technology disclosed in this patent is based on a stop member which is mounted on one of the drafting rolls. The stop member gets inserted and dispositions the opposing rolls to separate the rolls which stops the roving feed.

[0013] US 4480354 and US 4484376 - These patents disclose stopping the feed of roving when a yarn break is detected. The technology disclosed in these patents is also based on a shell which embraces the circumference of the lower roller of the drafting system, and the shell clamps the roving with the upper roller which causes the roving feed to be stopped.

[0014] US 5758482 - This patent discloses stopping the feed sliver through a mechanism which includes an elongate pivoting member which is pivotally mounted. One end of the pivoting member contains a yarn contact member and the other end contains a sliver comb. When a yarn breaks, the yarn contact member moves upward and the sliver comb moves downward and engages with the sliver and the sliver breaks under the forces of the continuously operating drafting rolls and the retention of the sliver by the sliver comb. The above patent is purely based on mechanical movements and it involves a direct contact with the yarn. The stop motion signal is from the contact member which touches the yarn continuously

[0015] US 4519199 - This patent discloses stopping the feed of roving when a yarn break is detected. The technology disclosed in this patent is also based on a component called clamping segment which interrupts the feed of the roving when a yarn break is detected. Said clamping segment remains in contact with the inlet drawing rollers of the drafting system for stopping of feed material.

[0016] US 4432195 - This patent discloses stopping the feed of roving when a yarn break is detected. The technology disclosed in this patent is also based on a component called clamping segment annularly clamped about the lower drafting roll which lifts the upper drafting roll away from the lower drafting roll to stop the feed material.

[0017] US 4538328 - This patent discloses stopping the feed of roving when a yarn break is detected. The technology disclosed in this patent is also based on a clamp for lifting the top roll away from the bottom roller of the drafting system, which results in stopping of feed material.

[0018] US 3841076 - This patent discloses stopping the feed of roving when a yarn break is detected. The technology involves a stop member which is in continuous contact with the roving material.

[0019] US 3292358 - This patent discloses stopping winding and twisting mechanism upon breakage or exhaustion of the strand of yarn being operated upon. Especially, the winding unit is provided with a stop motion adapted to move a portion of the winding unit to place that unit in a stopped or inoperative position when a strand of yarn being twisted and wound breaks or exhausted. A brake is applied to the spindle to stop its rotation.

[0020] US 3271823 - This patent discloses stopping the drive means of the drawing frame and the rotation of the drafting rolls when a break is detected in the supply sliver strand through detector.

[0021] From the aforementioned prior art references related to spinning mechanisms, it is evident that all the prior arts disclose stopping the feed material based on the yarn running status. None of the above prior arts disclose monitoring the status of more than one feed material and stopping the supply if one or more feed material breaks or missing.

[0022] Hence there is a need in the art to develop a device to overcome the deficiencies in the prior art. The present invention provides a solution to stop the feeding material if more than one feed material is used for production of yarn in one spinning position of Ring frame.

OBJECTS OF THE INVENTION

[0023] The main object of the invention is to develop a device which can stop the feed material in case of missing or broken feed materials when more than one feed materials are used for producing yarn in Ring Spinning Machine.

[0024] Other objects of the invention will be apparent from the description of the invention herein below.

SUMMARY OF THE INVENTION

[0025] Accordingly the present invention is directed towards a device for detecting the missing or broken feed materials in a spinning machine having more than one feed materials used in a production position for producing yarn wherein one or more optical light sources and light receivers are used which continuously senses the presence of more than one feed material which are fed for yarn production.

[0026] In case if one or more of the multiple feed materials is missing / broken, then the sensor detects the missing/broken feed materials based on the optical properties. The detected signal is transmitted to the signal processing unit and the signal processing unit further transmits the signal to activate the feed material stop motion device mounted at the feeding zone of individual spindle positions. The feed material stop motion device further activates and stops the supply of the feed materials for the individual spindle position.

[0027] The feed material stop motion device generally carries a wedge which will be on the periphery of the back bottom roller of the Ring frame drafting system. In case feed material break is detected, the signal is transmitted to the feed material stop motion device and the wedge enters in between the back bottom and back top roller thereby stopping the feeding of the other feed materials to the drafting system and stops the yarn production at that particular spindle position.

[0028] The main advantage of this present invention is to avoid production of yarn with deviated quality characteristics and additionally, pneumafil waste is also avoided.

BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is described in the detailed description and not by way of limitation, in the figures of the accompanying drawings, and in which

Figure 1 shows a device with an array of light sources (2), and light receivers (3) for detection of presence of feed materials (4a & 4b).

Figure 2 shows a device with single light source (2) and light receiver (3).

Figure 3 shows a device with light source (2) and light receiver (3) in a single monolithic piece called as transceiver (7) where one or more transceivers (7) are positioned vertically.

Figure 4 shows a device with light source (2) and light receiver (3) in a single monolithic piece called as transceiver (7) where one or more transceivers (7) are positioned horizontally.

Figure 5 shows the signal from a group of sensors (1) received by a common signal processing unit (5) to activate the respective feed material stop motion device (6).

Figure 6 shows the signal from individual sensor (1) received by individual signal processing units (5) to activate the respective feed material stop motion device (6).

Figure 7 shows a device with light source (2) and light receiver (3) placed opposite to each other and the feed material (4a & 4b) is in between the light source (2) and light receiver (3).

[0030] For the purpose of proper understanding of the various features, as illustrated in the drawings, the following explanation of the legends against each reference numeral, as used in the drawings is described below:

1 - Sensor
2 - Light Source
3 - Light Receiver
4a, 4b - Feed Materials
5 - Signal Processing Unit
6 - Feed material stop motion device
7 - Transceiver

DETAILED DESCRIPTION OF THE INVENTION

[0031] The present invention is used in Ring spinning machines where more than one feed materials are used to produce a yarn in one production position. This invention detects the missing or broken feed materials and stops the other feed materials.

[0032] In the following description, for the purpose of explanation, numerous specific details are set forth to provide a thorough understanding and diagrams are provided to avoid obscuring details.

[0033] In a preferred embodiment , the present invention provides a device for detecting the missing or broken feed materials in a spinning machine having more than one feed materials (4a & 4b) used in a production position for producing yarn comprising a sensor (1) having a light source (2) and a light receiver (3) for detecting the presence of more than one feed materials (4a & 4b) wherein the sensor (1) communicates through a signal processing unit (5) to activate the feed material stop motion device (6) in case of one or more of the multiple feed materials (4a & 4b) missing or broken.

[0034] Figure 1 explains an embodiment where the device with a sensor (1) continuously senses the presence of more than one feed materials (4a & 4b) which are fed for yarn production for one production position. The sensor (1) especially contains array of light sources (2) and light receivers (3) for detection of presence of feed materials (4a & 4b). In case if one or more feed materials breaks (4a or 4b), the light receiver (3) detects the missing feed material based on the reflection properties from the feed material (4a or 4b).

[0035] The signal is transmitted to the signal processing unit (5) and the signal processing unit (5) further transmits the signal to activate the feed material stop motion device (6) which is mounted on individual spindle positions for stopping the other feed materials (4a or 4b) in case of one or more feed material breaks.

[0036] Figure 2 explains another embodiment where the sensor (1) contains single light source (2) and single light receiver (3). The light receiver (3) detects the absence of at least one feed material (4a or 4b) and transmits the signal to the signal processing unit (5) and the signal processing unit (5) further transmits the signal to activate the feed material stop motion device (6).

[0037] Figure 3 explains yet another embodiment wherein the sensor (1) contains light source (2) and light receiver (3) in a single monolithic piece called as transceiver (7). The transceiver (7) is positioned vertically as illustrated. More than one such transceiver (7) can be used to identify the presence of feed material (4a & 4b). If one or more feed material (4a or 4b) is missing, then it generates a signal which is sent to signal processing unit (5) and further the signal processing unit (5) transmits the signal to the feed material stop motion device (6) to stop the feeding of other feed materials (4a or 4b).

[0038] Figure 4 explains another embodiment wherein plurality of the transceivers (7) is placed horizontally for detecting the presence of feed material (4a & 4b).

[0039] The above such sensor (1) as explained for Figure 1 to Figure 4 is illustrated for one production position of a Ring frame.

[0040] In a still another embodiment, the sensor (1) may be provided for each production position of the spinning machine. Such sensors (1) can be connected in plurality throughout the Ring frame to serve for all production positions.

[0041] Figure 5 explains the signal from a group of sensors (1) received by a common signal processing unit (5) and further the signal is transmitted to activate the respective feed material stop motion device (6).

[0042] Figure 6 explains signal from a sensor (1) received by individual signal processing units (5) for each production position and further the signal is transmitted to activate the respective feed material stop motion device (6).

[0043] Figure 7 explains yet another embodiment wherein the sensor (1) contains single or plurality of light source (2) and light receiver (3) placed opposite to each other and the feed material (4a and 4b) is passed in between the light source (2) and light receiver (3). When the feed material (4a or 4b) is present, light will be obstructed partially or fully by the feed material (4a or 4b). When feed material is missing or broken, the light from the light source (2) falls over the light receiver (3) and the generated signal is sent to signal processing unit (5) and further the signal processing unit (5) transmits the signal to the feed material stop motion device (6) to stop the feeding of other feed materials (4a or 4b). The light source (2) and light receiver (3) can be independently placed or they can be placed in a single monolithic piece.

[0044] In the above embodiments, the sensor (1) can use any of the optical light sources (2) in the range of Ultraviolet Light (UV), Visible Light (VL), Near Infra Red (NIR) and Infra Red (IR) spectrums.

[0045] In all the above embodiments of the present invention, the production of yarn with deviated quality characteristics is avoided.

[0046] SALIENT FEATURES OF THE INVENTION

1. Sensor (1) carries light source (2) and light receiver (3) which senses more than one feed material (4a & 4b) in a ring frame.

2. In case of one or more feed material (4a or 4b) is missing or broken, the signal is passed to the roving stop motion device (6) to stop the supply of other feed materials (4a or 4b) which are being supplied to the drafting system of the ring frame.

3. Sensor (1) carries multiple or plurality of light sources (2) and light receivers (3) as an array to accommodate and sense the presence of more than one feed materials (4a & 4b) being fed to ring frame drafting system.

4. Alternatively, the light source (2) and light receiver (3) can be single which is capable of monitoring and detecting more than one feed material (4a & 4b).

5. In another embodiment, the light source (2) and receiver (3) can be a monolithic piece called transceiver (7) which is capable of monitoring and detecting more than one feed material. More than one transceiver (7) can be used. Such transceiver (7) can be positioned either vertically or horizontally.

6. The above such sensor (1) is explained for one production position of a Ring frame. Such individual sensors (1) can be connected throughout the Ring frame to serve for all spindle positions.

7. The optical sensor (1) can use any of the optical light sources in the range of Ultraviolet Light (UV), Visible Light (VL), Near Infra Red (NIR) and Infra Red (IR) spectrums.

,CLAIMS:CLAIMS

We Claim:

1. A device for detecting the missing or broken feed materials in a spinning machine having more than one feed materials (4a & 4b) used in a production position for producing yarn
comprising a sensor (1) having a light source (2) and a light receiver (3) for detecting the presence of more than one feed materials (4a & 4b) wherein the sensor (1) communicates through a signal processing unit (5) to activate the feed material stop motion device (6) in case of one or more of the multiple feed materials (4a & 4b) missing or broken.

2. The device as claimed in claim 1, wherein the light source (2) and light receiver (3) are in single or in plurality as an array.

3. The device as claimed in claim 1, wherein the light source (2) can be the optical light sources in the range of ultra-violet light (UV), visible light (VL), near infra-red (NIR) or infra-red (IR) spectrums.

4. The device as claimed in claim 1, wherein the light source (2) and light receiver (3) are in a single monolithic piece called transceiver (7) and the transceiver can be in single or in plurality as an array where such transceivers (7) can be positioned in a sensor (1) either horizontally or vertically.

5. The device as claimed in claim 1, wherein sensor (1) may be provided for each production position of the spinning machine.

6. The device as claimed in one of the claims 1 to 5 , wherein a common signal processing unit (5) is used for collecting the signal from plurality of sensors (1) for plurality of production positions.

7. The device as claimed in one of the claims 1 to 5, wherein individual signal processing unit (5) is used for collecting the signal from a sensor (1) for individual production position.