GB2237884A - Measuring the quality of silvers, rovings and textile fibre threads - Google Patents
Measuring the quality of silvers, rovings and textile fibre threads Download PDFInfo
- Publication number
- GB2237884A GB2237884A GB9020008A GB9020008A GB2237884A GB 2237884 A GB2237884 A GB 2237884A GB 9020008 A GB9020008 A GB 9020008A GB 9020008 A GB9020008 A GB 9020008A GB 2237884 A GB2237884 A GB 2237884A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rollers
- pair
- measuring
- sample
- rovings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000004753 textile Substances 0.000 title claims description 13
- 239000000835 fiber Substances 0.000 title description 2
- 238000005303 weighing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000009987 spinning Methods 0.000 abstract description 4
- 239000003990 capacitor Substances 0.000 description 8
- 239000004020 conductor Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- 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
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/36—Textiles
- G01N33/365—Filiform textiles, e.g. yarns
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Mechanical Engineering (AREA)
- Quality & Reliability (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Treatment Of Fiber Materials (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
A thread (11) is passed through apparatus comprising a capacitative sensor (12) for measuring mass regularity, a stretching device (13) for evaluating cohesive forces, breaking force and breaking elongation and a device (20) for measuring the force applied to the thread. The device (13) comprises two pairs of rollers (17a, 17b, 18a and 18b) driven at different circumferential speeds V1 and V2. By varying the distance D between the pairs of rollers the breaking force is determined. A third pair of rollers (19a, 19b) can be included in the stretching device. A second capacitative sensor 23 allows the mass regularity after stretching to be determined. The average count is determined by weighing apparatus (14, 26). The apparatus serves for improved control of the spinning process. <IMAGE>
Description
- --.1 IC:5 a ",, 1 1 PROCESS AND APPARATUS FOR CHARACTER IS: 1 ING AN:,
QUALITY OF SLIVLRS AKD ROVINGS OR OF TEXTILE FIERE This invention relates to a process for characterising and measuring the quality of slivers and rovings or of threads produced from textile fibres, the count, the mass regularity, the cohesive force and the breaking elongation of similar fibrous samples of the said slivers and/or the said rovings being determined by this process.
It also relates to an apparatus for carrying out this process, said apparatus comprising a device for measuring the count and the mass regularity, a device for evaluating the cohesive force and a device for measuring the breaking force and breaking elongation of similar fibrous samples of slivers and rovings.
Textile fibres can be transformed into threads by a spinning process consisting of several successive stages during which the initial random fibrous mass is transformed successively into a lap, into slivers, into rovings and then into threads. Slivers consist of linear assemblages of substantially parallel but untwisted fibres. Rovings are produced as a result of improving the slivers by means of stretching and twisting. The latter are in turn stretched and twisted to produce threads.
It is essential to control the count and the mass regularity, on the one hand, and the cohesive force, applied force and elongation force, on the other hand, at the intermediate sliver and roving stages in order to guarantee proper regularity of the final product, i.e. the thread.
The mass regularity of a linear textile structure (lap, sliver, roving, thread) depends on local fluctuations in the linear mass, also referred to as count and generally expressed in tex.
At present, the regularity of slivers, rovings and threads is measured dynamically by means of an electronic irregularity tester equipped with a capacitive sensor consisting essentially of a measuring capacitor. To this end, the linear textile sample is driven at a constant speed by two drive cylinders or rollers between the two plates of the measuring capacitor.
Localised variations in the count of the sample lead to variations in the capacitance of the capacitor, which are then converted into electrical signals. The latter are processed in the arithmetic unit of the irregularity tester in order to provide a detailed statistical analysis of the random or accidentally cyclic fluctuations associated with the count of the sample being tested. The latter can be collected in a receiving trough disposed on a suitable weighing device for the simultaneous determination of the average count of the sample.
The cohesive force, breaking strength and breaking elongation of the slivers and rovings or textile threads are generally determined nonautomatically with the aid of measuring devices by means of which increasing tensile stresses can be applied to the sample until the breakage thereof. The cohesive force of a sliver or a fibre roving depends on a number of parameters, the most important being the geometry (length, fineness, surface quality and crimp) of the fibres, their degree of parallelism and the type and quantity of any textile oil added to assist spinning. A precise knowledge of the interfibrary cohesive forces associated with, inter alia, crimp and oiling has proven to be absolutely essential for optimising the quality of the thread and the settings of the machines for the spinning process. of course, it is extremely desirable for the parameters characterising this cohesion to be determined i i continuously, repetitively and automatically.
It is not possible to proceed in this manner with the apparatus of the prior art, this constituting a significant disadvantage, and depriving spinners of information that would be very useful, or even essential, making their work easier and improving the quality of the threads produced.
This invention proposes to mitigate these disadvantages of the prior art and to provide spinners with a process and an apparatus for carrying out the aforementioned measures.
This problem is solved by the process according to the invention, said process being characterised in that, in order to measure the said cohesive force and the said breaking force and breaking elongation of a fibrous sample, said sample is stretched, in that it is passed continuously between at least two pairs of rollers driven at increasing circumferential speeds, the first pair of rollers being disposed at the outlet side of a device for measuring the mass regularity, while the second pair of rollers is mounted on a component for measuring the force applied to the said sample.
The apparatus according to the invention is characterised in that it comprises at least one stretching arrangement comprising two pairs of rollers driven at increasing circumferential speeds, a first pair of rollers driven at a first circumferential speed V,, between which a fibrous sample passes, and a second pair of rollers driven at a second circumferential speed V2, between which the said fibrous sample passes, the speed V2 being higher than the speed V1, so that the portion of the sample positioned momentarily between the z first and the second pair of rollers undergoes stretching that is proportional to the difference of the speeds (V2 - V,), and In that the second pair of rollers at least is associated with a component for measuring the tensile stress applied to the said fibrous sample.
According to a preferred embodiment, this apparatus moreover comprises a device for measuring the mass of the sample, disposed at the outlet side of the said second pair of rollers, and consisting of a weighing device equipped with a receiving trough, in which the said sample is collected for the determination of its count.
This apparatus may advantageously comprise means for measuring the stretching distance D of the said sample. The said means are preferably adapted to ensure the vertical displacement of the second pair of rollers in relation to the f irst pair of rollers.
According to another preferred embodiment, it may comprise, at the outlet side of the second pair of rollers, a second device for measuring the regularity, so that the variations in the mass of a sample of slivers or rovings can be measured as a function of the stretching conditions to which the said sample Is subjected.
According to an advantageous embodiment, the apparatus according to the invention comprises a second stretching arrangement formed by the second pair of rollers and a third pair of rollers, the said third pair of rollers being driven at a. circumferential speed V3 higher than the circumferential speed V2 of the second pair of rollers.
i i J This invention will be more clearly understood with reference to the description of one embodiment of the apparatus according to the invention and to the description of the process for using this apparatus, and to the accompanying drawing, in which:
The single drawing shows a schematic view of the apparatus according to the invention.
With reference to the drawing, the apparatus comprises at least one element for guiding the sample, e.g. a guide wheel 10, which can rotate freely about its axis. From this guide element, the sample 11 follows a substantially vertical trajectory. It passes through a capacitive sensor 12 adapted to measure the mass regularity of the sample. At the outlet side of this sensor, the roving or sliver is engaged in a stretching arrangement 13. A receiving trough 14 is provided after the stretching arrangement, the sample being collected therein.
The capacitive sensor 12 comprises a measuring capacitor 15 and a reference capacitor 16. The measuring capacitor comprises two conductors or plates 15a and 15b, which delimit a gap traversed by the sample. The reference capacitor comprises two conductors or plates 16a and 16b, which delimit a gap identical to the one separating the two plates 15a and 15b. By means of a comparison of the instantaneous capacitance of the two capacitors, it is possible to determine a differential capacitive signal which is a function of the count of the sample and makes it possible to determine its mass regularity. A capacitive sensor of this kind is known and is described in the French Patent published under the No. 2 587 806, forming a 1 component of an apparatus for the analysis of textile threads.
The stretching arrangement 13 as illustrated comprises a first pair of rollers 17a, 17b, driven in rotation in an anticlockwise direction, so as to apply tensile stress to the sample and to move it in the direction of the arrow A. The rotation of the rollers 17a and 17b is uniform and their circumferential speed is equal to a value V1. This arrangement comprises a second pair of rollers 18a, 18b, driven in rotation, again in an anticlockwise direction, so as to apply tensile stress to the sample in the same direction as the arrow A. The circumferential speed of the rollers 18a and 18b is equal to a value V2, which is higher than the value V,, so that the sample undergoes stretching that is proportional to the difference of the values V2 - V1 of the circumferential speeds of the rollers 18a, 18b and 17a, 17b.
The arrangement 13 can be equipped with a second stretching assembly 13f consisting of the pair of rollers 18a, 18b and a third pair of rollers 19a, 19b rotating at a circumferential speed V3. In this case, the stretching undergone by the sample is divided into two phases, a first phase in which the stretching is proportional to the difference V2 - V, of the circumferential speeds of the first two pairs of rollers, and a second phase in which the stretching is proportional to the difference V3 - V2 of the circumferential speeds of the second and third pairs of rollers.
The second pair of rollers 18a, 18b (and/or possibly the third pair of rollers 19a, 19b) is associated with a device 20 for measuring the tensile stress applied to the sample. This consists of a balance-type sensor 21, which is coupled to a i recording instrument 22.
It will be noted that at least one of the pairs of rollers 18a, 18b or 17a, 17b is movable in relation to the other, as shown by the double arrow B, so that it is possible to vary the distance D separating them. This distance D is referred to as the stretching distance.
In practice, the breaking force is determined by applying different stretching distances to the sample. If the stretching rollers define a stretching distance D greater than the length of the fibres of the sample, the fibres slide along one another, so that the stretching force can be determined. If the rollers define a stretching distance D smaller than the length of the fibres, the fibres gripped simultaneously between the first two rollers 17a, 17b and the second rollers 18a, 18b are stretched individually or in bulk, possibly until breakage, so that the strength of the fibres and the breaking elongation and breaking force can be determined.
By virtue of the receiving trough 14, the samples can be collected in order to be weighed by means of a device 26, their length being measured simultaneously. By virtue of these measures, it is possible to determine the average count of the sample being analysed.
The apparatus may be completed by a second capacitive sensor 23 disposed at the outlet side of the stretching arrangement 13. It is identical to the sensor 12 and makes it possible to determine the mass regularity of the sample after stretching.
For the purposes of its calibration, the capacitive sensor 12 fl is associated with two jacks 24 for moving the sample momentarily outside the space provided between the plates 15a and 15b. These jacks can be replaced by magnetic devices of the type having a solenoid plunger.
w If it is mounted on the apparatus, the capacitive sensor 23 is also associated with two jacks (or the like) 25 having the same function as the jacks 24.
This invention is not limited to the embodiments described and illustrated here by way of example, but is subject to various modifications and can be realised in various embodiments obvious to the expert.
k 0
Claims (9)
1. Process for characterising and measuring the quality of slivers and rovings or of threads produced from textile fibres, the count, the mass regularity, the cohesive force and the breaking force and breaking elongation of similar fibrous samples of the said slivers and/or the said rovings being determined by this process, characterised in that, in order to measure the said cohesive force and the said breaking force and breaking elongation of a fibrous sample, said sample is stretched, in that it is passed continuously between at least two pairs of rollers driven at increasing circumferential speeds, the first pair of rollers (17a, 17b) being disposed at the outlet side of a device (12) for measuring the mass regularity, while the second pair of rollers (18a, 18b) is mounted on a component (20) for measuring the force applied to the said sample.
2. Apparatus for characterising and measuring the quality of slivers and rovings or of threads on the basis of textile fibres, for carrying out the process according to claim 1, comprising a device for measuring the count and the mass regularity, a device for evaluating the cohesive force and a device for measuring the breaking force and breaking elongation of similar fibrous samples of slivers or rovings, characterised in that it comprises at least one stretching arrangement (13) comprising two pairs of rollers (17a, 17b, 18a, 18b) driven at increasing circumferential speeds, a f irst pair of rollers (17a, 17b) driven at a first circumferential speed V,, between which a fibrous sample passes, and a second pair of rollers (18a, 18b) driven at ' a second circumferential speed V2, between which the said f ibrous sample passes, the speed V2 being higher than the speed V,, so that the portion of the sample positioned momentarily between the f irst and the second pair of rollers undergoes stretching that is proportional to the difference of the speeds (V2 - V1), and in that the second pair of rollers at least is associated with a component (20) for measuring the tensile stress applied to the said fibrous sample.
3. Apparatus according to claim 2, characterised in that it moreover comprises a device (26) for measuring the mass of the sample, disposed at the outlet side of the said second pair of rollers, and consisting of a weighing device equipped with a receiving trough (14), in which the said sample is collected for the determination of its count.
4. Apparatus according to claim 2, characterised in that it also comprises means for measuring the stretching distance D of the said sample.
5. Apparatus according to claim 4, characterised in that the said means are adapted to ensure the vertical displacement of the second pair of rollers (18a. 18b) in relation to the first pair of rollers (17a, 17b).
6. Apparatus according to claim 1, characterised in that it comprises, at the outlet side of the second pair of rollers, a second device (23) for measuring the regularity, so that the variations in the mass of a sample of slivers or rovings can be measured as a function of the stretching conditions to which the said sample is subjected.
1 1 Apparatus according to claim 1, characterised in that it comprises a second stretching arrangement (13') formed by the second pair of rollers (18a, 18b) and a third pair of rollers (19a, 19b), the said third pair of rollers being driven at a circumferential speed V 3 higher than the circumferential speed V 2 of the second pair of rollers.
8. Process for characterising and measuring the quality of slivers and rovings or of threads produced from textile fibres substantially as hereinbefore described and as illustrated in the accompanying drawing.
9. Apparatus for characterising and measuring the quality of slivers and rovings or of threads on the basis of textile fibres substantially as hereinbefore and as illustrated in the accompanying drawing.
Published 1991 at The Patent Office. State House. 66/71 High Holborri. London WC I R4TP Further copies may be obtained from Sales Branch. Unit 6. Nine Mile Point Cwmiclirdach. Cross Keys. Newport. NPI 7HZ. Printed by Multiplex techniques lid, St Mary Cray. Kent.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8912224A FR2651888B1 (en) | 1989-09-14 | 1989-09-14 | METHOD AND APPARATUS FOR CHARACTERIZING AND MEASURING THE QUALITY OF TEXTILE FIBER TAPES AND CORDS. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9020008D0 GB9020008D0 (en) | 1990-10-24 |
| GB2237884A true GB2237884A (en) | 1991-05-15 |
Family
ID=9385614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9020008A Withdrawn GB2237884A (en) | 1989-09-14 | 1990-09-13 | Measuring the quality of silvers, rovings and textile fibre threads |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPH03185174A (en) |
| CH (1) | CH683799A5 (en) |
| DE (1) | DE4029172A1 (en) |
| FR (1) | FR2651888B1 (en) |
| GB (1) | GB2237884A (en) |
| IT (1) | IT1244308B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387021B (en) * | 2007-09-10 | 2011-10-19 | 立达英格尔施塔特有限公司 | Method for calculating the linear weight of a ribbon and spinning preparation machine |
| CN103832884A (en) * | 2014-03-05 | 2014-06-04 | 昆山盛夏复合材料科技有限公司 | Rotary shaft structure of carbon fiber winder |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29519501U1 (en) * | 1995-12-08 | 1996-01-25 | Stein Herbert Textechno | Device for testing single fibers |
| WO1997032209A1 (en) * | 1996-02-26 | 1997-09-04 | Zellweger Luwa Ag | Process and device for the determination of strength properties of long, textile samples |
| GB9705946D0 (en) * | 1997-03-21 | 1997-05-07 | Univ Hull | Testing apparatus |
| IT1316364B1 (en) * | 2000-02-11 | 2003-04-10 | Zuccolini Livio | PROCEDURE AND APPARATUS TO MEASURE THE TITLE OF THE YARNS |
| CN1314953C (en) * | 2004-08-10 | 2007-05-09 | 东华大学 | Combined measuring device for fabric and yarn mechanics index and use |
| CN102305763B (en) * | 2011-05-30 | 2013-04-03 | 东华大学 | Objective evaluating device for fuzzing and pilling condition of yarn |
| DE102013207778A1 (en) * | 2013-04-29 | 2014-10-30 | Cht R. Beitlich Gmbh | Comb polymers as detergency booster for detergents and cleaners |
| CZ306305B6 (en) | 2015-02-13 | 2016-11-23 | VĂšTS, a.s. | Method of continuously measuring roving cohesive force or that of a similar fibrous formation and apparatus for making the same |
| CZ309187B6 (en) * | 2016-12-21 | 2022-04-27 | Rieter Cz S.R.O. | Method and device for continuously detecting yarn stretching forces in both drawing zones of a two-zone stretching device during spinning or spinning simulation on a spinning machine |
| CN109932243B (en) * | 2018-12-21 | 2022-05-24 | 东华大学 | Multifunctional intelligent fiber bundle strength instrument and measuring method and application thereof |
| CN109932244B (en) * | 2019-03-27 | 2021-11-05 | 苏州华兆林纺织有限公司 | Elasticity testing arrangement for textile fabric |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1065671A (en) * | 1963-05-22 | 1967-04-19 | Lawson Hemphill | Apparatus for testing materials |
| GB1184586A (en) * | 1966-07-28 | 1970-03-18 | Cyril Aloysius Litzler | Modulus Tester for Tire and Industrial Cords. |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE857696C (en) * | 1951-05-01 | 1952-12-01 | Herbert Stein | Method and device for determining the tensile strength of continuously moving threads, twisted threads, wires and the like. like |
| JPS58176534A (en) * | 1982-04-09 | 1983-10-17 | Toray Ind Inc | Measuring system of shrink characteristics of yarn |
| FR2549096B1 (en) * | 1983-06-21 | 1985-11-08 | Superba Sa | METHOD FOR THE AUTOMATIC CONTROL OF TEXTILE THREADS AND APPARATUS FOR CARRYING OUT SAID METHOD |
| DD269211A1 (en) * | 1987-12-18 | 1989-06-21 | Warnke Chemiefaserwerk Veb | DEVICE FOR CONTINUOUS EXPRESSION MEASUREMENT OF POLYMERIC FAEDES |
-
1989
- 1989-09-14 FR FR8912224A patent/FR2651888B1/en not_active Expired - Fee Related
-
1990
- 1990-09-05 CH CH2877/90A patent/CH683799A5/en not_active IP Right Cessation
- 1990-09-11 IT IT02143190A patent/IT1244308B/en active IP Right Grant
- 1990-09-13 GB GB9020008A patent/GB2237884A/en not_active Withdrawn
- 1990-09-14 DE DE4029172A patent/DE4029172A1/en not_active Withdrawn
- 1990-09-14 JP JP2242835A patent/JPH03185174A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1065671A (en) * | 1963-05-22 | 1967-04-19 | Lawson Hemphill | Apparatus for testing materials |
| GB1184586A (en) * | 1966-07-28 | 1970-03-18 | Cyril Aloysius Litzler | Modulus Tester for Tire and Industrial Cords. |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387021B (en) * | 2007-09-10 | 2011-10-19 | 立达英格尔施塔特有限公司 | Method for calculating the linear weight of a ribbon and spinning preparation machine |
| CN103832884A (en) * | 2014-03-05 | 2014-06-04 | 昆山盛夏复合材料科技有限公司 | Rotary shaft structure of carbon fiber winder |
Also Published As
| Publication number | Publication date |
|---|---|
| IT9021431A1 (en) | 1992-03-11 |
| IT1244308B (en) | 1994-07-08 |
| GB9020008D0 (en) | 1990-10-24 |
| FR2651888B1 (en) | 1993-10-22 |
| IT9021431A0 (en) | 1990-09-11 |
| JPH03185174A (en) | 1991-08-13 |
| DE4029172A1 (en) | 1991-03-28 |
| CH683799A5 (en) | 1994-05-13 |
| FR2651888A1 (en) | 1991-03-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |