US3435673A - Method of,and an apparatus for,obtaining measurements which correspond to the substance cross-section of textile material - Google Patents

Method of,and an apparatus for,obtaining measurements which correspond to the substance cross-section of textile material Download PDF

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US3435673A
US3435673A US634654A US3435673DA US3435673A US 3435673 A US3435673 A US 3435673A US 634654 A US634654 A US 634654A US 3435673D A US3435673D A US 3435673DA US 3435673 A US3435673 A US 3435673A
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textile material
section
cross
substance
pressure
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US634654A
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Ernst Felix
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Zellweger Uster AG
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B13/00—Measuring arrangements characterised by the use of fluids
    • G01B13/20—Measuring arrangements characterised by the use of fluids for measuring areas, e.g. pneumatic planimeters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
    • B65H63/062—Electronic slub detector
    • B65H63/067—Electronic slub detector using fluid sensing means, e.g. acoustic
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/22—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to presence of irregularities in running material
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/32—Regulating or varying draft
    • D01H5/38—Regulating or varying draft in response to irregularities in material ; Measuring irregularities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/53—Auxiliary process performed during handling process for acting on performance of handling machine
    • B65H2301/531—Cleaning parts of handling machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • Suitable measuring systems for determining substance cross-section of textile material are extremely important to quality control in the textile industry insofar as they enable the manufacturing processes to be monitored and regulated on the basis of the results that are provided.
  • the only measuring systems of this type in common use are capacitive and optical measuring systems.
  • the principal disadvantage of a capacitive system is that it is sensitive to the moisture content of the textile material and therefore does not provide consistently accurate measurement. In addition to this, the zero or neutral point is not stable enough to insure dependability of operation.
  • optical measuring systems difficulties are encountered due to lack of stability in both phototransmitters and photo-receivers.
  • capacitive and optical measuring systems it has already been proposed as a result of extensive tests to take measurements on the principle of the absorption of radio-active rays by the textile material. Unfortunately, none of these proposals has had any practical applications for a variety of reasons.
  • the present invention has an object to obviate the disadvantages inherent in known devices, as indicated above, and relates to a method of obtaining measurements corresponding to the substance cross-section of textile material, slivers in particular, in which the textile material is drawn at a predetermined speed through a nozzle having at least one constriction, pneumatic pressure generated at the constriction being evaluated as the measured quantity relating to the substance crosssection of the textile material.
  • the invention also provides an apparatus for carrying out this method, comprising a nozzle through which the textile material can travel and which tapers in cross-section in the direction of movement of the textile material and has a hollow or empty space between two planes lying one behind the other, extending vertically of its axis, and a manometer connected to this empty space for determining a quantity relating to the pneumatic pressure in the hollow or empty space.
  • FIGURE 1 shows a cross-section of a basic nozzle arrangement in accordance with the invention
  • FIGURE 2 is a section through a funnel-shaped nozzle (trumpet),
  • FIGURE 3 shows a trumpet of the kind shown in FIG- URE 2 with an annular widened portion
  • FIGURE 4 shows a trumpet with groove machined into it
  • FIGURE 5 shows a measuring system with a nozzle and pressure compensation in accordance with the invention.
  • textile material 5 is drawn through two substantially concentric apertures 1 and 2 lying one behind the other, as shown in FIGURE 1.
  • the aperture 2 is smaller in diameter than the aperture 1 so that after passing through the aperture 1, the textile material is compressed by the aperture 2.
  • a certain amount of air is trapped in the constituent fibrous material of the sliver, and passes through the apertures together with the textile material. If the fibre crosssection is the same in both the apertures 1 and 2, a quantity of air which corresponds both to the rate of flow of the textile material and to the diflerence in cross-section of the two apertures, must be forced out of the mass of fibres during passage from the aperture 1 to aperture 2. This air escapes into the chamber 3, if possible; however, if the chamber 3 is completely, or at least partly, closed, all or part of the air must escape longitudinally through the sliver.
  • a fairly large substance cross-section generates a fairly high air resistance and accordingly a relatively high pressure in the chamber 3 which can be detected through a manometer, for example, connected to the chamber at an opening 4 in this chamber.
  • the air resistance could of course also be measured with compressed air introduced into the chamber.
  • the measuring medium itself supplies an active quantity of air pressure, which must be regarded as a. substantial advantage.
  • FIGURE 2 is a section through one embodiment of such a trumpet having a central passage which is reduced continuously in cross-section. It is of particular advantage to design these trumpets in accordance with the present invention wherein the central passage is provided with successive concentric apertures of ditferent size producing an abrupt reduction in the passage so that they can be used as measuring elements, as shown in FIGURE 3.
  • An annular widened portion 7 is provided in the wall of the trumpet in such a way that a first crosssection has a diameter ti, and a second cross-section a smaller diameter d
  • the widened portion 7 may communicate with a manometer or other measuring device (not shown) through a nipple 6.
  • a particularly simple form of trumpet is obtained by machining a groove 8 into the walls of the central passage and providing a radial bore 9 in communication therewith for the connection of a pressure gauge to the chamber formed by the groove 8.
  • nozzle configurations may be provided utilizing the principles set forth herein without departing from the spirit and scope of the present invention.
  • the pressure generated in the chamber 3 is, however, not only governed by the extent to which the sliver is constricted as it passes from the aperture 1 to the aperture 2, but also by the rate at which the sliver is pulled through the nozzle.
  • a unit of the kind shown in FIGURE 5 may be provided for producing a diiferential measurement; it comprises an air compressor 14 driven at a rotational speed proportional to the rate of passage of the sliver through the nozzle 11.
  • the pressure generated in the compressor 14 is applied in opposition to the pressure in the chamber 3, selectively through a regulating valve 13, for example in a differential manometer 12, the ratio between the pressure in the chamber 3 as applied to arm of the manometer, and the pressure in the arm 16 of the manometer 12 derived from compressor 14 via valve 13 will provide an indication of the substance cross-section.
  • the ditferential method using a compressor 14 is also of advantage insofar as the variable properties of the air, such as temperature and barometric pressure, are automatically taken into consideration and eliminated as factors in the measurement.
  • the regulating valve 13 also enables a desired value to be set for the substance cross-section to be measured in that a rise in pressure in the arm 16 requires an increasing substance cross-section in the trumpet 11 and vice versa.
  • a suitable converter means 18 known per se may be provided which converts the level of the manometer column 17 or its fluctuations into a suitable measured quantity which may be obtained as an electrical signal.
  • a method of obtaining measurements corresponding to the substance cross-section of a sliver of textile material comprising guiding the textile material through a nozzle having at least one relatively abrupt constriction in cross-section, whereby air is discharged from the textile material at said constriction, and
  • step of measuring includes providing a counter air pressure corresponding to the desired value of the substance crosssection of the textile material and comparing the generated air pressure with the counter air pressure to obtain a resultant value.
  • a method as defined in claim 2 further comprising converting said resultant value to an electrical signal.
  • a method of obtaining measurements corresponding to the substance cross-section of textile material, slivers in particular, comprising moving said textile material at a prescribed rate along a given path,
  • a method as defined in claim 4 further comprising the steps of providing a counter air pressure having a magnitude proportional to the rate of movement of the textile material and comparing the emitted air pressure with the counter air pressure to obtain a resultant value. 6. A method as defined in claim 5 further comprising converting said resultant value to an electrical signal.
  • An apparatus for obtaining measurements corresponding to the substance cross-section of textile material, slivers in partcular comprising a nozzle having a central through-passage, said throughpassage having a relatively abrupt reduction in crosssection at an area along its length in the direction of movement of textile material therethrough, and
  • measuring means connected to said nozzle for measuring the air pressure created in said through-passage at the point of said abrupt reduction in cross-section by the compression of said textile material by said abrupt reduction in cross-section.
  • said .nozzle further includes a chamber positioned between two parallel planes transverse to the axis of said throughpassage at the area of abrupt reduction in cross-section thereof, said measuring means being connected to said chamber.
  • said nozzle further includes a transverse bore communicating with said chamber, said measuring means being connected to said bore.
  • measuring means includes a differential manometer having a first inlet connected to said chamber and a second inlet, a compressor providing a counter air pressure connected to the second inlet of said manometer.
  • measuring means further includes a regulating valve connected between said compressor and said second inlet of said manometer.
  • measuring means further includes converter means for converting the reading of said manometer into measured quantities corresponding to the substance cross-section of the textile material.
  • measuring means includes a manometer connected to said nozzle for measuring air pressure in said through-passage.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Measuring Arrangements Characterized By The Use Of Fluids (AREA)

Description

E. FELIX METHOD OF. AND AN APPARATUS FOR OBTAINING MEASUREMENTS WHICH CORRESPOND TO THE SUBSTANCE CROSS-SECTION 0F TEXTILE MATERIAL Filed April 28, 1967 United States Patent 3,435,673 METHOD OF, AND AN APPARATUS FOR, OBTAIN- ING- MEASUREMENTS WHICH CORRESPOND TO THE SUBSTANCE CROSS-SECTION 0F TEX- TILE MATERIAL Ernst Felix, Uster, Switzerland, assignor to Zellweger, Ltd., Uster, Switzerland Filed Apr. 28, 1967, Ser. No. 634,654 Claims priority, application Switzerland, May 6, 1966, 6,663/ 66 Int. Cl. G011 5/04 US. Cl. 73-160 Claims ABSTRACT OF THE DISCLOSURE Method and apparatus for measuring the substance cross-section of textile material, slivers in particular, in which the textile material is drawn at a predetermined speed through a nozzle having at least one constriction, pneumatic pressure generated at the constriction being evaluated as the measured quantity relating to the substance cross-section of the textile material.
Background of the invention Suitable measuring systems for determining substance cross-section of textile material are extremely important to quality control in the textile industry insofar as they enable the manufacturing processes to be monitored and regulated on the basis of the results that are provided. At present, the only measuring systems of this type in common use are capacitive and optical measuring systems. The principal disadvantage of a capacitive system is that it is sensitive to the moisture content of the textile material and therefore does not provide consistently accurate measurement. In addition to this, the zero or neutral point is not stable enough to insure dependability of operation. In optical measuring systems, difficulties are encountered due to lack of stability in both phototransmitters and photo-receivers. In addition to capacitive and optical measuring systems, it has already been proposed as a result of extensive tests to take measurements on the principle of the absorption of radio-active rays by the textile material. Unfortunately, none of these proposals has had any practical applications for a variety of reasons.
Brief description of the invention The present invention has an object to obviate the disadvantages inherent in known devices, as indicated above, and relates to a method of obtaining measurements corresponding to the substance cross-section of textile material, slivers in particular, in which the textile material is drawn at a predetermined speed through a nozzle having at least one constriction, pneumatic pressure generated at the constriction being evaluated as the measured quantity relating to the substance crosssection of the textile material. The invention also provides an apparatus for carrying out this method, comprising a nozzle through which the textile material can travel and which tapers in cross-section in the direction of movement of the textile material and has a hollow or empty space between two planes lying one behind the other, extending vertically of its axis, and a manometer connected to this empty space for determining a quantity relating to the pneumatic pressure in the hollow or empty space.
It is an object of the present invention to provide method and apparatus for obtaining measurements of the substance cross-section of textile material which is dependable and consistently accurate in operation.
It is another object of the present invention to provide a method and apparatus as described wherein variable ice properties of air, such as temperature and pressure, are eliminated automatically as factors in the measurement.
It is a further object of the present invention to provide a method and apparatus as described wherein the measurement of a silver of textile material is accomplished by measurement of the air derived from abrupt reduction in the cross-section of the sliver.
It is an object of the present invention to provide an apparatus of the type described which is capable of producing a measurement independent of the rate of movement of the sliver of textile material.
These and other objects, features and advantages of the present invention will become more apparent from the following detailed description thereof when taken in conjunction with the accompanying drawings wherein:
FIGURE 1 shows a cross-section of a basic nozzle arrangement in accordance with the invention,
FIGURE 2 is a section through a funnel-shaped nozzle (trumpet),
FIGURE 3 shows a trumpet of the kind shown in FIG- URE 2 with an annular widened portion,
FIGURE 4 shows a trumpet with groove machined into it, and
FIGURE 5 shows a measuring system with a nozzle and pressure compensation in accordance with the invention.
Detailed description of the invention In the method according to the invention, textile material 5 is drawn through two substantially concentric apertures 1 and 2 lying one behind the other, as shown in FIGURE 1. The aperture 2 is smaller in diameter than the aperture 1 so that after passing through the aperture 1, the textile material is compressed by the aperture 2. A certain amount of air is trapped in the constituent fibrous material of the sliver, and passes through the apertures together with the textile material. If the fibre crosssection is the same in both the apertures 1 and 2, a quantity of air which corresponds both to the rate of flow of the textile material and to the diflerence in cross-section of the two apertures, must be forced out of the mass of fibres during passage from the aperture 1 to aperture 2. This air escapes into the chamber 3, if possible; however, if the chamber 3 is completely, or at least partly, closed, all or part of the air must escape longitudinally through the sliver.
A fairly large substance cross-section generates a fairly high air resistance and accordingly a relatively high pressure in the chamber 3 which can be detected through a manometer, for example, connected to the chamber at an opening 4 in this chamber. The air resistance could of course also be measured with compressed air introduced into the chamber. In the present method, however, the measuring medium itself supplies an active quantity of air pressure, which must be regarded as a. substantial advantage.
Elements for constricting the fibre-cross-section of slivers are known per se and are commonly used in many textile machines, being referred to therein as condensers or trumpets. FIGURE 2 is a section through one embodiment of such a trumpet having a central passage which is reduced continuously in cross-section. It is of particular advantage to design these trumpets in accordance with the present invention wherein the central passage is provided with successive concentric apertures of ditferent size producing an abrupt reduction in the passage so that they can be used as measuring elements, as shown in FIGURE 3. An annular widened portion 7 is provided in the wall of the trumpet in such a way that a first crosssection has a diameter ti, and a second cross-section a smaller diameter d The widened portion 7 may communicate with a manometer or other measuring device (not shown) through a nipple 6.
A particularly simple form of trumpet, as seen in FIG- URE 4, is obtained by machining a groove 8 into the walls of the central passage and providing a radial bore 9 in communication therewith for the connection of a pressure gauge to the chamber formed by the groove 8. Of course, other nozzle configurations may be provided utilizing the principles set forth herein without departing from the spirit and scope of the present invention.
The pressure generated in the chamber 3 is, however, not only governed by the extent to which the sliver is constricted as it passes from the aperture 1 to the aperture 2, but also by the rate at which the sliver is pulled through the nozzle. To allow for this factor in the measurement, a unit of the kind shown in FIGURE 5, for example, may be provided for producing a diiferential measurement; it comprises an air compressor 14 driven at a rotational speed proportional to the rate of passage of the sliver through the nozzle 11. If the pressure generated in the compressor 14 is applied in opposition to the pressure in the chamber 3, selectively through a regulating valve 13, for example in a differential manometer 12, the ratio between the pressure in the chamber 3 as applied to arm of the manometer, and the pressure in the arm 16 of the manometer 12 derived from compressor 14 via valve 13 will provide an indication of the substance cross-section. The ditferential method using a compressor 14 is also of advantage insofar as the variable properties of the air, such as temperature and barometric pressure, are automatically taken into consideration and eliminated as factors in the measurement.
In cases where a regulating system is used, the regulating valve 13 also enables a desired value to be set for the substance cross-section to be measured in that a rise in pressure in the arm 16 requires an increasing substance cross-section in the trumpet 11 and vice versa.
In order to derive a signal from the pressure difference measured in the manometer 12, a suitable converter means 18 known per se may be provided which converts the level of the manometer column 17 or its fluctuations into a suitable measured quantity which may be obtained as an electrical signal.
I have shown and described several embodiments in accordance with the present invention. It is understood that the same is not limited thereto but is susceptible of numerous changes and modifications as known to a person skilled in the art and I, therefore, do not wish to be limited to the details shown and described herein.
I claim:
1. A method of obtaining measurements corresponding to the substance cross-section of a sliver of textile material comprising guiding the textile material through a nozzle having at least one relatively abrupt constriction in cross-section, whereby air is discharged from the textile material at said constriction, and
measuring the air pressure generated by said discharge of air at said constriction.
2. A method as defined in claim '1 wherein said step of measuring includes providing a counter air pressure corresponding to the desired value of the substance crosssection of the textile material and comparing the generated air pressure with the counter air pressure to obtain a resultant value.
3. A method as defined in claim 2 further comprising converting said resultant value to an electrical signal.
4. A method of obtaining measurements corresponding to the substance cross-section of textile material, slivers in particular, comprising moving said textile material at a prescribed rate along a given path,
abruptly restricting the cross-section of said textile material at a point along said path, and
measuring the pressure of the air forced out from said textile material as a result of the restriction of the cross-section thereof. 5. A method as defined in claim 4 further comprising the steps of providing a counter air pressure having a magnitude proportional to the rate of movement of the textile material and comparing the emitted air pressure with the counter air pressure to obtain a resultant value. 6. A method as defined in claim 5 further comprising converting said resultant value to an electrical signal.
7. An apparatus for obtaining measurements corresponding to the substance cross-section of textile material, slivers in partcular, comprising a nozzle having a central through-passage, said throughpassage having a relatively abrupt reduction in crosssection at an area along its length in the direction of movement of textile material therethrough, and
measuring means connected to said nozzle for measuring the air pressure created in said through-passage at the point of said abrupt reduction in cross-section by the compression of said textile material by said abrupt reduction in cross-section.
8. An apparatus as defined in claim 7 wherein said through-passage tapers gradually toward its axis from one end to the other in the direction of movement of textile material therethrough with the exception of said area of abrupt change in cross-section.
9. An apparatus as defined in claim 7 wherein said .nozzle further includes a chamber positioned between two parallel planes transverse to the axis of said throughpassage at the area of abrupt reduction in cross-section thereof, said measuring means being connected to said chamber.
10. An apparatus as defined in claim 9 wherein said through-passage tapers gradually toward its axis and said chamber is provided as an annular groove in the surface of said through-passage.
11. An apparatus as defined in claim 10 wherein said nozzle further includes a transverse bore communicating with said chamber, said measuring means being connected to said bore.
12. An apparatus as defined in claim 9 wherein said measuring means includes a differential manometer having a first inlet connected to said chamber and a second inlet, a compressor providing a counter air pressure connected to the second inlet of said manometer.
13. An apparatus as defined in claim 12 wherein said measuring means further includes a regulating valve connected between said compressor and said second inlet of said manometer.
14. An apparatus as defined in claim 13 wherein said measuring means further includes converter means for converting the reading of said manometer into measured quantities corresponding to the substance cross-section of the textile material.
15. An apparatus as defined in claim 7 wherein said measuring means includes a manometer connected to said nozzle for measuring air pressure in said through-passage.
References Cited UNITED STATES PATENTS Biddison 73-37.7
LOUIS R. PRINCE, Primary Examiner.
J. NOLTON, Assistant Examiner.
US. Cl. X.R. 73-37.7
US634654A 1966-05-06 1967-04-28 Method of,and an apparatus for,obtaining measurements which correspond to the substance cross-section of textile material Expired - Lifetime US3435673A (en)

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CH666366A CH436779A (en) 1966-05-06 1966-05-06 Method and device for obtaining measured values which correspond to the substance cross-section of textile material, in particular of fiber ribbons

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JP (1) JPS4924180B1 (en)
AT (1) AT284484B (en)
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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3722260A (en) * 1970-03-11 1973-03-27 Rieter Ag Maschf Method and apparatus for detecting weight variations of a sliver on spinning preparatory machines
US3728894A (en) * 1969-02-19 1973-04-24 Gen Electric Fluidic gaging device
US4100791A (en) * 1977-05-02 1978-07-18 Fiber Controls Corporation Auto-leveler
US4122703A (en) * 1976-11-24 1978-10-31 Davis Jesse B Method and apparatus for reeling discrete yarn strand patterns
US4184361A (en) * 1976-12-18 1980-01-22 Trutzschler Gmbh & Co. Kg Sliver density sensing apparatus
US4199844A (en) * 1978-04-25 1980-04-29 Platt Saco Lowell Limited Method and means for regulating sliver draft uniformity
US4302968A (en) * 1979-10-15 1981-12-01 Rieter Machine Works, Ltd. Method and apparatus for measuring the linear density of a travelling fiber sliver
US4306450A (en) * 1979-10-15 1981-12-22 Rieter Machine Works, Ltd. Apparatus for measuring a cross-sectional area of a travelling fiber sliver
US4438548A (en) * 1980-01-17 1984-03-27 Zellweger Uster Ltd. Method and apparatus for controlling fluctuations in sliver weight on cards, carding machines and the like
US4473924A (en) * 1979-10-13 1984-10-02 Zinser Textilmaschinen Gmbh Means for controlling fiber-drawing apparatus
US4758968A (en) * 1985-05-16 1988-07-19 North Carolina State University Method and apparatus for continuously measuring the variability of textile strands
EP0631136A2 (en) * 1993-06-23 1994-12-28 Zellweger Luwa Ag Apparatus for measuring the mass or cross-sectional density of fibre bands and use of the apparatus
EP0750060A1 (en) * 1995-06-22 1996-12-27 Zellweger Luwa Ag Apparatus for detecting mass irregularities of a fibre sliver
US5755135A (en) * 1995-01-05 1998-05-26 Rieter Ingolstadt Spinnereimaschinenbau Ag Process for pressing a scanning device against a fiber sliver in a sliver guide and device for its production

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
CH624759A5 (en) * 1977-12-22 1981-08-14 Rieter Ag Maschf
CH636323A5 (en) * 1978-09-13 1983-05-31 Zellweger Uster Ag Process and device for obtaining electrical signals which correspond to the cross-section of spun yarns and are independent of the velocity thereof
CH635373A5 (en) * 1979-04-06 1983-03-31 Zellweger Uster Ag MEASURING AND CONTROL DEVICE WITH A MEASURING FUNNEL FOR DETERMINING THE PULLING FORCE OF FIBER TAPES.

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US2465818A (en) * 1943-06-26 1949-03-29 Gen Electric Device for measuring fiber density of a sliver
US2560883A (en) * 1948-06-26 1951-07-17 Applic Et De Const Pour Materi Device for measuring or checking a transverse dimension in a piece of indefinite length
US2843882A (en) * 1955-06-08 1958-07-22 Us Rubber Co Evener
US2952262A (en) * 1957-01-30 1960-09-13 Molins Machine Co Ltd Manufacture of cigarettes
US3176503A (en) * 1962-12-19 1965-04-06 Inteco Corp Pressure vessel leak testor
US3283564A (en) * 1964-12-28 1966-11-08 Du Pont Pneumatic deniering apparatus

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Publication number Priority date Publication date Assignee Title
US2465818A (en) * 1943-06-26 1949-03-29 Gen Electric Device for measuring fiber density of a sliver
US2560883A (en) * 1948-06-26 1951-07-17 Applic Et De Const Pour Materi Device for measuring or checking a transverse dimension in a piece of indefinite length
US2843882A (en) * 1955-06-08 1958-07-22 Us Rubber Co Evener
US2952262A (en) * 1957-01-30 1960-09-13 Molins Machine Co Ltd Manufacture of cigarettes
US3176503A (en) * 1962-12-19 1965-04-06 Inteco Corp Pressure vessel leak testor
US3283564A (en) * 1964-12-28 1966-11-08 Du Pont Pneumatic deniering apparatus

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3728894A (en) * 1969-02-19 1973-04-24 Gen Electric Fluidic gaging device
US3722260A (en) * 1970-03-11 1973-03-27 Rieter Ag Maschf Method and apparatus for detecting weight variations of a sliver on spinning preparatory machines
US4122703A (en) * 1976-11-24 1978-10-31 Davis Jesse B Method and apparatus for reeling discrete yarn strand patterns
US4184361A (en) * 1976-12-18 1980-01-22 Trutzschler Gmbh & Co. Kg Sliver density sensing apparatus
US4100791A (en) * 1977-05-02 1978-07-18 Fiber Controls Corporation Auto-leveler
US4199844A (en) * 1978-04-25 1980-04-29 Platt Saco Lowell Limited Method and means for regulating sliver draft uniformity
US4473924A (en) * 1979-10-13 1984-10-02 Zinser Textilmaschinen Gmbh Means for controlling fiber-drawing apparatus
US4302968A (en) * 1979-10-15 1981-12-01 Rieter Machine Works, Ltd. Method and apparatus for measuring the linear density of a travelling fiber sliver
US4306450A (en) * 1979-10-15 1981-12-22 Rieter Machine Works, Ltd. Apparatus for measuring a cross-sectional area of a travelling fiber sliver
US4438548A (en) * 1980-01-17 1984-03-27 Zellweger Uster Ltd. Method and apparatus for controlling fluctuations in sliver weight on cards, carding machines and the like
US4758968A (en) * 1985-05-16 1988-07-19 North Carolina State University Method and apparatus for continuously measuring the variability of textile strands
EP0631136A2 (en) * 1993-06-23 1994-12-28 Zellweger Luwa Ag Apparatus for measuring the mass or cross-sectional density of fibre bands and use of the apparatus
US5499546A (en) * 1993-06-23 1996-03-19 Zellweger Luwa Ag Method of measuring the mass of fiber slivers
US5501100A (en) * 1993-06-23 1996-03-26 Zellweger Luwa Ag Device for measuring the mass of fiber slivers
EP0631136A3 (en) * 1993-06-23 1997-03-05 Luwa Ag Zellweger Apparatus for measuring the mass or cross-sectional density of fibre bands and use of the apparatus.
US5755135A (en) * 1995-01-05 1998-05-26 Rieter Ingolstadt Spinnereimaschinenbau Ag Process for pressing a scanning device against a fiber sliver in a sliver guide and device for its production
EP0750060A1 (en) * 1995-06-22 1996-12-27 Zellweger Luwa Ag Apparatus for detecting mass irregularities of a fibre sliver

Also Published As

Publication number Publication date
NL6704597A (en) 1967-11-07
DE1648798B1 (en) 1971-09-16
AT284484B (en) 1970-09-10
CS161693B2 (en) 1975-06-10
JPS4924180B1 (en) 1974-06-20
GB1137297A (en) 1968-12-18
CH436779A (en) 1967-05-31
BE696344A (en) 1967-09-01

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