Title of Invention | APPARATUS AT A SPINNING PREPARATION MACHINE FOR DETECTING WASTE SEPARATED OUT FROM FIBRE MATERIAL |
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Abstract | In an apparatus at a spinning preparation machine, for example a cleaner, opener, carding machine or the like, for detecting waste which is separated out from fibre material, for example cotton, and consists of foreign matter and good fibres and which is collected in a collecting device, there is provided an optical measuring device having a brightness sensor, which measuring device examines the waste. In order to make it possible, by simple means, for the content of good fibres in the waste to be detected and to allow optimum adjustment of the composition of the waste, especially with a high content of trash and a low content of good fibres, the waste material is moved past at least one sensor arrangement responding to good fibres, and the sensor arrangement comprises a light source, the light reflected by the moving good fibres being detected by the brightness sensor and being converted into electrical signals, from which the good fibre content can be determined. |
Full Text | Apparatus at a spinning preparation machine, for example a cleaner, opener, carding machine or the like, for detecting waste separated out from fibre material, for example cotton The invention relates to an apparatus at a spinning preparation machine, for example a cleaner, opener, carding machine or the like, for detecting waste which is separated out from fibre material, for example cotton, and consists of foreign matter and good fibres and which is collected in a collecting device, wherein there is provided an optical measuring device having a brightness sensor, which measuring device examines the waste. In a known apparatus (EP-A-0 399 315), the beater pins of a cleaning roller convey the fibre flocks over cleaning bars which are adjustable so that the intensity of cleaning can be varied. Below the cleaning bars, a brightness sensor measures the brightness as a measure of the contaminant content of the offtake (waste), which has been separated out by the cleaning bars and is collected in a funnel-like collecting device. At prespecified time intervals, the offtake is drawn off under suction by way of a suction conveyor arranged at the lower end of the collecting device. The brightness - measured by the brightness sensor - of the separated-out waste, in the form of a signal, is input into a control system and displayed on a display. One disadvantage is that the sensor serves only for detecting the contaminant content; the content of good fibres is not detected. It is furthermore disadvantageous that the determined degree of cleaning is investigated, by sensors, in the offtake chamber of the cleaning machine. Finally, the brightness, that is to say the degree of brightness - measured by the sensor - of the offtake is merely input into the control system without, however, any optimum operating point of the cleaning machine being derived therefrom. The invention is accordingly based on the problem of providing an apparatus of the kind described at the beginning which avoids the mentioned disadvantages and which especially makes it possible for the content of good fibres in the offtake to be detected by simple means and allows optimum adjustment of the composition of the offtake, especially with a high content of foreign matter (trash) and a low content of good fibres. The problem is solved by the characterising features of claim 1. The measures according to the invention make it possible for the content of good fibres in the offtake to be detected automatically and allow optimum adjustment of the composition of the offtake (trash/good fibres) by simple means. The brightness sensor and the subsequent evaluation provide precise information relating to the content of good fibres in the offtake, that information being used for adjustment of the separating elements. In the process, a continuous, objective and, accordingly, person-independent assessment of the separated-out waste is carried out. It is, especially, possible to determine, and if necessary to influence, the amount of good fibres that are, undesirably, also separated out. Existing machine elements can be so adjusted in dependence upon the results obtained that a predetermined, desired waste composition is obtained automatically. It is especially advantageous that the variation in the brightness signal (coefficient of variation/standard deviation of light reflection) corresponds to the quantitative distribution curve of the waste (trash/good fibres), from which an optimum operating point is derived for adjustment of the separating elements for the cleaning of the fibre material. The function between the coefficient of variation and, for example, the position of the adjustable guide vanes of the cleaning machine exhibits a characteristic change in the gradient (gradient endpoint or range) which corresponds to the optimum operating point for cleaning. Determining the optimum operating point is carried out by means of an arrangement that is very simple in terms of apparatus, which constitutes a further advantage. Claims 2 to 63 contain advantageous developments of the invention. The invention will be described hereinafter in greater detail with reference to exemplary embodiments shown in the drawings, in which: Fig. 1a shows, in a diagrammatic cross-sectional side view, a cleaning machine having several suction hoods for waste; Fig. 1b shows, in a side view, the cleaner of Fig. 1a having apparatuses according to the invention; Fig. 2 shows, in a cross-sectional front view, the apparatus according to Fig. 1b having an apparatus according to the invention arranged at a suction offtake channel; Fig. 2a shows an apparatus according to the invention arranged at a connection piece; Figs. 3a, 3b show a waste-separating location having an adjustable guide vane; Fig. 3c is a top view of the guide vane according to Figs. 3a, 3b together with an actuating motor and an angle- measuring element; Fig. 4 is a top view of the apparatus according to Fig. 1b; Fig. 5 is a generalised circuit diagram of an electronic control and regulation device having connected apparatuses according to the invention, an evaluation device, an angle-measuring device for guide vane angles, an operating and display device and an actuating device for guide vanes; Fig. 6 shows, in a diagrammatic side view, a feed device for a carding machine together with apparatuses according to the invention at suction waste-offtake hoods; Fig. 7 shows the apparatus according to the invention comprising a photodiode, a light source and a measuring device for data collection at a waste pipe-line; Fig. 8 shows the standard deviation (CV %) of the measurement voltage and the measurement voltage in dependence upon the guide vane position (or the width of the separation opening) and Fig. 9 shows the waste composition in dependence upon the guide vane position (or the width of the separation opening). In accordance with Fig. 1a, the fibre material to be cleaned (arrow F), especially cotton, in flock form, is fed to the cleaning apparatus, for example a Trutzschler CVT 4, which is arranged in an enclosed housing. That is accomplished, for example, by means of a charging shaft (not shown), a conveyor belt or the like. The lap is fed, by two feed rollers 1, 2, with nipping, to a pinned roller 3, which is rotatably mounted in the housing and rotates in an anti-clockwise direction (arrow A). Downstream of the pinned roller 3 there is arranged a clothed roller 4 covered by a sawtooth clothing. The roller 3 has a circumferential speed of about 10 to 21 m/sec. The roller 4 has a circumferential speed of about 15 to 25 m/sec. Roller 5 has a higher circumferential speed than roller 4, and roller 6 has a higher circumferential speed than roller 5. Downstream of rollers 3 and 4 there are successively arranged two further sawtooth rollers 5 and 6, the directions of rotation of which are denoted by reference letters C and D, respectively. Rollers 3 to 6 have a diameter of about from 150 to 300 mm. The pinned roller 3 is enclosed by the housing. Associated with the pinned roller 3 is a separation opening 7 for removing fibre contaminants, the size of which opening is modified or modifiable according to the degree of contamination of the cotton. Associated with the separation opening 7 is a separating edge 12, for example a blade. In the direction of arrow A there are provided, at the roller 3, further separation opening 8 and a separating edge 13. A separation opening 9 and a separating edge 14 are associated with the sawtooth roller 4, a separation opening 10 and a separating edge 15 are associated with the sawtooth roller 5, and a separation opening 11 and a separating edge 16 are associated with the sawtooth roller 6. A suction offtake hood 17 to 21 is associated with each separating blade 12 to 16. Reference letter E denotes the work direction of the cleaner. In accordance with Fig. 1b, a suction offtake line 22, 23, 24, 25 and 26 is associated with each suction offtake hood 17, 18, 19, 20 and 21, respectively. The suction offtake lines 22 to 26 are in communication with a common suction offtake channel 27. The rigid suction offtake lines 22 to 26 and the suction offtake channel 27 are of integral construction of, for example, sheet metal or plastics material. The lengths of the suction offtake lines 22 to 2 6 differ according to the distance between the suction offtake hood 17 to 21 and the suction offtake channel 27. The cross-sections 27I to 27v of the suction offtake channel 27 - seen in the direction of flow (arrow K) - are located downstream of the entry of each suction offtake line 22 to 26. The end of the suction offtake channel 27 is connected to a suction source (not shown). The directions of flow within the suction offtake lines 22 to 26 are shown by arrows L to P. The mode of operation is as follows: The lap consisting of fibre flocks (F) is fed from the feed rollers 1, 2, with nipping, to the pinned roller 3, which combs through the fibre material and takes up fibre tufts on its pins. When the roller 3 passes the separation opening 7 and the separating edge 12, the centrifugal force, in dependence upon the circumferential speed and curvature of that roller and also upon the size of the separation opening 7, which is matched to that first separation step, causes waste (short fibres and coarse contaminants) and a certain (per se undesirable) amount of good fibres to be flung out from the fibre material remaining on the roller; the material passes through the separation opening 7 into a suction offtake hood 17 (contaminants) in the housing. The fibre material pre-cleaned in that manner is taken off the first roller 3 by the tips of the clothing of the clothed roller 4 and is further opened out. When the rollers 4, 5 and 6 pass the separation openings 9, 10 and 11, respectively, having separating edges 14, 15, and 16, respectively, further contaminants are flung out from the system of fibres as a result of the centrifugal force. Arrows B, C and D denote the directions of rotation of the clothed rollers 4, 5 and 6, respectively. Reference numerals 17 to 21 denote suction offtake devices for the contaminants leaving by the separation openings 7 to 11, respectively. The directions of rotation A, B, C and D of rollers 3, 4, 5 and 6, respectively, are different at adjacent rollers. At the end of the final roller 6 there is provided a pneumatic suction offtake device 22 for the cleaned fibre material (arrow H). The circumferential speed of each downstream roller is greater than the circumferential speed of the respective upstream roller. Reference numerals 23' to 26' denote adjustable air-guiding elements mounted at the air entry openings of the suction offtake hoods 18 to 21, by means of which elements the amount of air drawn in can be adjusted. In the walls of the suction offtake channels 27a, 27b for the suction offtake hoods 17 to 21 there is mounted at each end face, that is to say coaxially with respect to the suction offtake hood 17 to 21, a transparent pane 40a to 40e (see Fig. 2) so that it is possible to see into the suction offtake hood 17 to 21 from the outside. Associated with each of the panes 40a to 40e is a sensor arrangement 42 according to the invention, located outside the suction offtake channels 27a, 27b, by means of which the waste flowing through the suction offtake hood 17 to 21 and into the suction offtake channel 27a, 27b is detected by the sensor arrangement 42. In accordance with Fig. 2, the suction offtake hood 17 is arranged between the two frame walls 28, 29 (housing walls); a connection piece 30a, 30b is provided outside the walls 28, 29 at each end 17a, 17b of the suction offtake hood 17 so that the suction offtake hood 17 passes through two openings in the frame walls 28, 29. A resilient annular seal 32, for example made from foamed material, is placed around the connection pieces 30. One end region 22a of the suction offtake line 22 opens out into the suction offtake channel 27a (cf. Fig. 1b); the other end region 22b of the suction offtake line 22 opens out into the suction offtake channel 27b. Reference numeral 34 denotes a fastening element, for example a screw connection. The ends of the suction offtake channels 27a, 27b are connected to a common suction offtake channel 44 (see Fig. 4), which is connected to a suction source (not shown). The connection of the suction offtake line 22a to the suction offtake hood 17 and the suction offtake channel 27a corresponds to the connection of the suction offtake line 22b to the suction offtake hood 17 and the suction offtake channel 27b. On each outer face of the suction offtake channels 27a, 27b there is mounted a transparent pane 40a and 40b, respectively, with which there is associated a camera 41a and 41b, respectively, outside the suction offtake channels 27a and 27b, respectively, which camera is used for detecting the waste. Arrows Q and R denote the flow directions of the suction offtake streams inside the suction offtake hood 17. The cleaning apparatus illustrated in Figures la, lb and 2 have devices by means of which the amount and also, to some extent, the nature of the waste being separated (foreign matter, trash, neps, good fibres etc.) can be adjusted or influenced. Those devices are in the form of motor-adjustable guide vanes 37 mounted in the region of the opener and cleaning rollers 3 to 6 upstream of the separating blades. It is possible, by means of the angular position a of those vanes 37 to influence the amount and also, to a certain extent, the nature of the material separated I {Figs. 3a, 3b), a large angle of opening a resulting in a relatively large amount of separated material I and a small angle resulting in a correspondingly smaller amount. Stipulating the desired amount of separated material I at the same time determines very especially the cleaning action of the machine on the good material. Because it is generally the case that, with this kind of separation I, "good" fibre material will always be separated out as well, it is, in practice, necessary to find an acceptable compromise. This means that as much "bad material" as possible is separated out whilst, at the same time, separating out a minimum amount of good fibres. In order to be able to assess the waste I separated out and consequently to change the possible settings, the waste I is separated out, collected and, finally, visually assessed in the manner according to the invention. In accordance with Fig. 2, a transparent pane 40a is mounted in the wall surface of the suction offtake channel 27b, the centre-point of which pane is aligned with the axis of the suction offtake hood 17. Associated with the pane 40a, on the outside of the suction offtake channel 27b, is a sensor arrangement 42a (brightness sensor) in the form of a photodiode (see Fig. 7). In addition, a light source 41 (see Fig. 7) is provided directly next to the photodiode. In accordance with Fig. 2a, the pane 40g is arranged in the wall surface of the connection piece 33b, which connects the suction offtake channel 27b to the outlet from the suction offtake hood 17. Associated with the pane 40f, on the outside, is a brightness sensor 42f. In accordance with Fig. 4, the waste K1 to K8 from the individual separation locations is combined on each side of the machine, drawn off continuously by means of a partial vacuum and conveyed to a central filtration and separation system 44. In this case, in accordance with the invention, there is integrated in the waste channel 27b, at the level of, that is to say aligned with, each suction offtake hood 17 to 21, a brightness sensor 42a to 42d, together with appropriate illumination 41a to 41d and evaluation unit. The system is so arranged that fibres, foreign matter and other matter flying past in the line 27b can be detected. The system is furthermore so arranged that it is possible to distinguish good fibres in the waste and to provide information relating thereto. In dependence upon corresponding specified requirements, the machinery influencing the composition of the waste I (e.g. the guide vanes 37) is then automatically adjusted until the desired waste quality has been achieved. In accordance with Fig. 5, there are connected to an electronic control and regulation device 43 (machine control), for example a microcomputer, three sensor systems 42a, 42b, 42c by way of three evaluation devices 44a, 44b, 44c, an operating and display device 50, three angle- measuring devices 46a, 46b, 46c for guide vane angles a (Figs. 3a, 3b) and three vane-adjusting devices 45a, 45b, 45c for adjustment of the guide vanes 37a, 37b and 37c, respectively. In accordance with Fig. 6, in the case of a carding machine, for example a Trützschler DK 903 high-performance carding machine, there are provided, in the feed system of lickers-in 47a, 47b, 47c, a suction waste-offtake hood 48a, 48b and 48c at each roller, respectively, and also a connecting line 49 for the suction offtake hoods 48a to 48c. Associated with each of the suction offtake hoods 48a to 48c and with the connecting line 49 is a sensor system 42a, 42b, 42c and 42d (see Fig. 7) . In accordance with Fig. 7, there is provided in the wall surface of the waste line 27 an opening in which there are arranged a brightness sensor 42 in the form of a photodiode and a light source 41 in the form of a direct- current visible-light illuminator. The photodiode 42 (photovoltaic element) is a signal transducer. The photodiode 42 is connected, by way of lines 421, 422, with a measurement apparatus 44 for data collection (voltage measurement apparatus). The system is based on the detection and evaluation of changes in voltage or resistance caused by reflection differences (differences in brightness caused by a difference in reflection) in spaces containing moving waste. For that purpose there is required a direct-current illuminator or high-frequency alternating- current illuminator, which is mounted at the end face or tangentially on the pipe-line or suction offtake hood of the spinning or cleaning room machine. Directly next to or even inside that illuminator there is a photosensitive element which receives the light reflected by the good fibres, converts it into current and measures the variation in reflection. The reflection is always detected in reflected incident light. An image is not required so that the detection problems caused by honeydew and other contaminants are avoided. It is solely the variations in the level of reflection (which are dependent upon the content of good fibres) that are used because it is only the variance that provides reliable information relating to the correctness of the operating point and the associated separation element setting. The optimum operating point is achieved at maximum contaminant separation and, at the same time, minimum good-fibre separation. A large amount of good fibres produces a high variation in reflection so that the variation in the current produced is correspondingly high or the remaining resistance is correspondingly low. In dependence upon that level, the separating unit can then be appropriately adjusted in order to control the amount of good fibres in the waste (cf. Figs. 3a, 3b). Fig. 8 shows the dependence of the voltage at the measurement apparatuses 44a to 44c and of the coefficient of variation of the voltage upon the guide vane angle. The coefficient of variation in % is defined as: In operation, for a specific fibre material, the angle a of the guide vane 37b is successively increased and the corresponding voltage values are detected at the measurement apparatus 44. A large amount of good fibres in the waste results in a correspondingly high voltage value because of a correspondingly high light reflection. The voltage measurement values of the measurement apparatuses 44a to 44c and the guide vane angles a of the angle- measuring devices 46a to 46c are input into the computer 43, which calculates the coefficients of variation (CV %) of the voltage and the functional dependence of the coefficient of variation on the guide vane angle a in accordance with the graph in Fig. 8. In the curve according to Fig. 8, at an angle a = 13.1°, there is a characteristic change in the gradient which corresponds to the optimum operating point of the cleaning machine. At angle settings a > 13.1°, the content of good fibres in the waste increases steeply, in undesirable manner, compared to the foreign matter and trash content (cf. Fig. 9). Then, by way of the actuating elements 45a to 45c, for example stepper motors, the inclination a of the guide vanes 37a to 37c is set to a = 13.1° in accordance with the optimum operating point. The procedure described above is carried out automatically - during ongoing production or in a preliminary test run. The optimum operating point can be monitored and, in the event of departures therefrom, can be re-set automatically. By means of the apparatus according to the invention, the irregularity of the stream of waste separated out is assessed in terms of its degree of opening. The irregularity is measured on the basis of the standard deviation of the light reflected by the individual items separated out. As a result of the incident light method, the contaminant content of the items is invisible to the sensor so that, with this measurement method, neither the contaminant content nor the brightness of the separated-out waste is assessed but rather only the variation in the brightness of the good fibres. In order to measure the quantitative waste distribution (trash/good fibres) it is also possible, in principle, to use infra-red light because the trash content of the waste reflects strongly in the infra-red range. From the voltage (resistance) difference between white-light and infra-red illumination it is possible to calculate the contents of trash and good fibres. The area of use encompasses all fibre- and waste-conveying channels but not waste chambers containing waste that is at rest. The sensor in accordance with the invention is advantageously used to determine a state of blockage in the suction offtake hood, in which case the machine control issues an error message. That may be advantageously accomplished by means of the fact that the normally dynamic signal changes to a static state as a result of the blockage, that static signal course being interpreted as an indication of a blockage, or by means of the fact that the signal exceeds or falls below certain limit values as a result of the blockage. WE CLAIM 1. Apparatus at a spinning preparation machine, for example a cleaner, opener, carding machine or the like, for detecting waste which is separated out from fibre material, for example cotton, and consists of foreign matter and good fibres and which is collected in a collecting device, wherein there is provided an optical measuring device having a brightness sensor, which measuring device examines the waste, characterised in that the waste material (I) is moved past at least one sensor arrangement responding to good fibres, and the sensor arrangement comprises a light source (41), the light reflected by the moving good fibres being detected by the brightness sensor (42a to 42g) and being converted into electrical signals, which are measured by a measurement element (44a to 44g). 2. Apparatus according to claim 1, characterised in that the collecting device is a pneumatic pipe-line. 3. Apparatus according to claim 1 or 2, characterised in that the collecting device is a suction offtake hood. 4. Apparatus according to any one of claims 1 to 3, characterised in that the waste is moved through the collecting device. 5. Apparatus according to any one of claims 1 to 4, characterised in that the brightness sensor is arranged in the wall region of the pipe-line or suction offtake hood. 6. Apparatus according to any one of claims 1 to 5, characterised in that the brightness sensor is located in the region of an end face of the pipe-line or suction offtake hood. 7. Apparatus according to any one of claims 1 to 6, characterised in that the brightness sensor comprises at least one photoelectric element. 8. Apparatus according to any one of claims 1 to 7, characterised in that the brightness sensor comprises at least one photodiode. 9. Apparatus according to any one of claims 1 to 8, characterised in that the brightness sensor is capable of detecting changes in voltage caused by differences in brightness. 10. Apparatus according to any one of claims 1 to 9, characterised in that the brightness sensor is connected to an electronic evaluation device. 11. Apparatus according to any one of claims 1 to 10, characterised in that the light source is a direct-current illuminator. 12. Apparatus according to any one of claims 1 to 11, characterised in that the light source is an alternating- current illuminator. 13. Apparatus according to any one of claims 1 to 12, characterised in that the light source is arranged in the immediate vicinity of the brightness sensor. 14. Apparatus according to any one of claims 1 to 13, characterised in that the light source is arranged next to the brightness sensor. 15. Apparatus according to any one of claims 1 to 14, characterised in that the sensor system operates in incident light. 16. Apparatus according to any one of claims 1 to 15, characterised in that the variation in the brightness of the good fibres is arranged to be determined. 17. Apparatus according to any one of claims 1 to 16, characterised in that the coefficient of variation of the brightness of the good fibres is arranged to be determined. 18. Apparatus according to any one of claims 1 to 17, characterised in that the standard deviation of the brightness of the good fibres is arranged to be determined. 19. Apparatus according to any one of claims 1 to 18, characterised in that detection and assessment of the waste are carried out automatically. 20. Apparatus according to any one of claims 1 to 19, characterised in that detection and assessment of the waste (I) are carried out continuously. 21. Apparatus according to any one of claims 1 to 20, characterised in that the measurement results of the evaluation device are compared with prespecified quantities. 22. Apparatus according to any one of claims 1 to 21, characterised in that, in the event of a departure from prespecified quantities, the waste separation can be modified. 23. Apparatus according to any one of claims 1 to 22, characterised in that at least one opto-electronic brightness measurer is integrated into the suction offtake lines through which the waste is taken off under suction. 24. Apparatus according to any one of claims 1 to 23, characterised in that more than one electronic evaluation device is provided. 25. Apparatus according to any one of claims 1 to 24, characterised in that more than one opto-electronic brightness measurer is connected to evaluation devices. 26. Apparatus according to any one of claims 1 to 25, characterised in that the evaluated measurement results relating to the consistency of the waste are compared with prespecified values and used for automatically modifying machine elements influencing separation. 27. Apparatus according to any one of claims 1 to 26, characterised in that the at least one evaluation device is in communication with the associated machine control. 28. Apparatus according to any one of claims 1 to 27, characterised in that the evaluated measurement results of the separation procedures are shown on the machine operating and display unit. 29. Apparatus according to any one of claims 1 to 28, characterised in that the evaluated measurement results of the separation procedures are passed on to other, possibly superordinate and central, systems. 30. Apparatus according to any one of claims 1 to 29, characterised in that at least one opto-electronic brightness measurer is associated with each machine. 31. Apparatus according to any one of claims 1 to 30, characterised in that at least one opto-electronic brightness measurer is arranged on each side of a machine. 32. Apparatus according to any one of claims 1 to 31, characterised in that the at least two brightness sensors are in communication with a central evaluation device. 33. Apparatus according to any one of claims 1 to 32, characterised in that different light sources are provided. 34. Apparatus according to any one of claims 1 to 33, characterised in that light sources of different colours are provided. 35. Apparatus according to any one of claims 1 to 34, characterised in that the different colours are red light and infra-red light. 36. Apparatus according to any one of claims 1 to 35, characterised in that at least one source of incident light is provided. 37. Apparatus according to any one of claims 1 to 36, characterised in that the evaluated measurement results are used for adjusting at least one guide vane associated with the roller. 38. Apparatus according to any one of claims 1 to 37, characterised in that the evaluated measurement results are used for adjusting at least one separating blade associated with the roller. 39. Apparatus according to any one of claims 1 to 38, characterised in that the at least one electronic evaluation device (measuring element 44a to 44c) is in communication with an electronic control and regulation device, for example a microcomputer. 40. Apparatus according to any one of claims 1 to 39, characterised in that the machine elements such as guide vanes, separating blades and the like are arranged to be automatically adjusted in dependence upon the evaluated measurement results. 41. Apparatus according to any one of claims 1 to 40, characterised in that the cleaning capability of the machine is modifiable in dependence upon the evaluated measurement results. 42. Apparatus according to any one of claims 1 to 41, characterised in that the nature of the waste (amount, composition) is modifiable in dependence upon the evaluated measurement results. 43. Apparatus according to any one of claims 1 to 42, characterised in that at least one separate brightness sensor is associated with each suction offtake location or guide vane. 44. Apparatus according to any one of claims 1 to 43, characterised in that the brightness sensor is associated with a central waste-collecting line. 45. Apparatus according to any one of claims 1 to 44, characterised in that a window for the brightness sensor is provided in each waste-collecting line. 46. Apparatus according to any one of claims 1 to 45, characterised in that a window for an illumination device is provided in each waste-collecting line. 47. Apparatus according to any one of claims 1 to 4 6, characterised in that the evaluated measurement results are used for determining the ratio of the good fibre content to the contaminant content. 48. Apparatus according to any one of claims 1 to 47, characterised in that the evaluated measurement results are used for assessing the quality of the fibre material being processed. 49. Apparatus according to any one of claims 1 to 48, characterised in that a machine is in communication with a central evaluation device, to which more than one brightness sensor is connected. 50. Apparatus according to any one of claims 1 to 49, characterised in that the electronic control and regulation device, for example a computer, has a memory for comparison data. 51. Apparatus according to any one of claims 1 to 50, characterised in that the evaluation device is in communication with a superordinate electronic evaluation system, for example KIT. 52. Apparatus according to any one of claims 1 to 51, characterised in that the measurement values of the brightness sensor are convertible into electrical signals. 53. Apparatus according to any one of claims 1 to 52, characterised in that the evaluated measurement results are used in a control and regulation circuit for optimising the cleaning of the fibre material. 54. Apparatus according to any one of claims 1 to 53, characterised in that the illumination device or light source operates using visible light. 55. Apparatus according to any one of claims 1 to 54, characterised in that the content of good fibres is arranged to be determined. 56. Apparatus according to any one of claims 1 to 55, characterised in that at least one angle-measuring device (46a to 46c) is connected to the control and regulation device. 57. Apparatus according to any one of claims 1 to 56, characterised in that at least one brightness sensor (42a to 42g) is connected to the control and regulation device. 58. Apparatus according to any one of claims 1 to 57, characterised in that at least one actuating element (45a to 45c) is connected to the control and regulation device. 59. Apparatus according to any one of claims 1 to 58, characterised in that the sensor arrangement is used for determining a blockage of fibre material in the collecting line. 60. Apparatus according to any one of claims 1 to 59, characterised in that a blockage in a suction hood is determined. 61. Apparatus according to any one of claims 1 to 60, characterised in that a static state of the electrical signal caused by the blockage is arranged to be detected. 62. Apparatus according to any one of claims 1 to 61, characterised in that exceeding, or falling below, a limit value for the electrical signal caused by the blockage is arranged to be detected. 63. Apparatus according to any one of claims 1 to 62, characterised in that the machine control issues an error message on the basis of the blockage. In an apparatus at a spinning preparation machine, for example a cleaner, opener, carding machine or the like, for detecting waste which is separated out from fibre material, for example cotton, and consists of foreign matter and good fibres and which is collected in a collecting device, there is provided an optical measuring device having a brightness sensor, which measuring device examines the waste. In order to make it possible, by simple means, for the content of good fibres in the waste to be detected and to allow optimum adjustment of the composition of the waste, especially with a high content of trash and a low content of good fibres, the waste material is moved past at least one sensor arrangement responding to good fibres, and the sensor arrangement comprises a light source, the light reflected by the moving good fibres being detected by the brightness sensor and being converted into electrical signals, from which the good fibre content can be determined. |
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141-KOL-2004-(10-10-2011)-OTHER PATENT DOCUMENTS.pdf
141-kol-2004-amanded claims.pdf
141-KOL-2004-CORRESPONDENCE.1.3.pdf
141-KOL-2004-CORRESPONDENCE.pdf
141-kol-2004-description (complete) 1.1.pdf
141-kol-2004-description (complete).pdf
141-kol-2004-examination report reply recieved.pdf
141-KOL-2004-EXAMINATION REPORT.1.3.pdf
141-KOL-2004-GRANTED-ABSTRACT.pdf
141-KOL-2004-GRANTED-CLAIMS.pdf
141-KOL-2004-GRANTED-DESCRIPTION (COMPLETE).pdf
141-KOL-2004-GRANTED-DRAWINGS.pdf
141-KOL-2004-GRANTED-FORM 1.pdf
141-KOL-2004-GRANTED-FORM 2.pdf
141-KOL-2004-GRANTED-LETTER PATENT.pdf
141-KOL-2004-GRANTED-SPECIFICATION.pdf
141-kol-2004-petition under rule 137.pdf
141-kol-2004-priority document.pdf
141-KOL-2004-REPLY TO EXAMINATION REPORT.1.3.pdf
141-kol-2004-specification.pdf
141-kol-2004-translated copy of priority document.pdf
Patent Number | 248731 | ||||||||||||
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Indian Patent Application Number | 141/KOL/2004 | ||||||||||||
PG Journal Number | 33/2011 | ||||||||||||
Publication Date | 19-Aug-2011 | ||||||||||||
Grant Date | 12-Aug-2011 | ||||||||||||
Date of Filing | 24-Mar-2004 | ||||||||||||
Name of Patentee | TRUTZSCHLER GMBH & CO. KG. | ||||||||||||
Applicant Address | DUVENSTRASSE 82-92, D-41199 MONCHENGLADBACH | ||||||||||||
Inventors:
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PCT International Classification Number | D01B 3/04 | ||||||||||||
PCT International Application Number | N/A | ||||||||||||
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