US3613743A - Method and apparatus for producing fabrics of high quality with considerably enhanced productivity - Google Patents

Method and apparatus for producing fabrics of high quality with considerably enhanced productivity Download PDF

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Publication number
US3613743A
US3613743A US883172A US3613743DA US3613743A US 3613743 A US3613743 A US 3613743A US 883172 A US883172 A US 883172A US 3613743D A US3613743D A US 3613743DA US 3613743 A US3613743 A US 3613743A
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United States
Prior art keywords
signals
fabric
defect
length
defects
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Expired - Lifetime
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US883172A
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English (en)
Inventor
Toemon Sakamoto
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Enshu Ltd
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Enshu Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
    • G01N21/898—Irregularities in textured or patterned surfaces, e.g. textiles, wood
    • G01N21/8983—Irregularities in textured or patterned surfaces, e.g. textiles, wood for testing textile webs, i.e. woven material
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J2700/00—Auxiliary apparatus associated with looms; Weavening combined with other operations; Shuttles
    • D03J2700/06—Auxiliary devices for inspecting, counting or measuring

Definitions

  • the present invention relates to an improved method and apparatus for producing fabrics of high quality with considerably enhanced productivity and, more particularly, to an improved method and apparatus for automatically carrying out quality inspection of fabric concurrently with the advance ment of the weaving operation so as to reduce the production of fabrics having an excessive number of defects.
  • the quality of the woven fabric is classified into three grades; A-grade, B-grade and C-grade.
  • the woven fabric is taken from the weaving loom and subjected to an eyesight inspection or an optical mechanical inspection process on a suitable inspection machine. This means that the inspection process is performed in a manner or stage separated from the weaving process.
  • This conventional fabric-inspecting process is accompanied with several drawbacks. For example, once a serious defect is caused during the weaving process, that defect is accumulated as the weaving process proceeds, and the formation of such defects cannot be precisely and exactly detected until the fabric is brought to the inspection process. That is, a succcessive formation of such defect cannot be obviated effectively and quickly. This causes undesirable successive production of fabrics of degraded quality and is a fatal disadvantage from a view point of economy in the fabric production. Further, as the inspection of the fabric is done subsequent to the weaving process of that fabric, it becomes rather difficult to relate the detected deflects to the malfunctions in the weaving operation, which malfunction might have caused the formation of those defects.
  • the warp sheet is provided with cut marks, for showing a unit length of the woven fabric, during the weaving preparation process and the resultant quality of the produced fabric is evaluated in view of thusly marked unit lengths of the fabric. Therefore, even in case a fabric portion of extremely high quality extends from a unit length to a next unit length crossing over the cut-mark point, the fabrics of both unit lengths will be classified as fabrics of degraded I quality if the remaining length portions in both fabrics are provided with an excessive number ofdefects.
  • a principal object of the present invention is to provide an improved method and apparatus for carrying out an inspection of fabric quality concurrently with an advancing weaving process in a manner to instantly and effectively reflect the detected results, thereby permitting a prompt elimination of the causes of such defects.
  • Another object of the present invention is to provide an improved method and apparatus for achieving production of highly graded fabrics at high-production efficiency while effectively eliminating drawbacks encountered in the prior art.
  • a further object of the present invention is to provide an improved method and apparatus for bringing about an effective. economical and exact repairing of the formed defects after the completion of the weaving.
  • a still further object of the present invention is to provide an improved method and apparatus effectively used for enhancing the yield of A-grade fabrics in the fabric formation.
  • count of defect will be often times used. This term should be understood as a combined conception of the kind and degree of the formed defects. Therefore, the term total count of defect refers to a combined conception of kind of defects with degree and number of the formed defect within a unit length of the fabric evaluated. Thus, when the degree of the formed defect is too high, the resultant total count of defects may be large as compared to the number of defects per a unit length of the fabric, and for various kinds of defects, certain plural unit counts are correspondingly given as to a single defect.
  • FIG. 1 is a block diagram view of an arrangement of the apparatus of the present invention
  • FIG. 2 is also a diagrammatic view for showing an embodiment of the apparatus shown in FIG. 1, and
  • FIG. 3 is an explanatory perspective view for showing a portion of an actual arrangement of the apparatus shown in FIG. 2.
  • the arrangement of the apparatus of the present invention is shown in a summarized illustration.
  • defects formed on the fabric processed on a weaving loom l are successively detected by an optical-type detecting element 2 and luminous signals corresponding to the detected defects are converted into corresponding electric signals so as to be brought into a memory 3.
  • This memorization of the detected results by the memory 3 includes three simultaneously proceeding operations. In the first operation, the number of the defects formed is memorized in an accumulative manner. In the second operation, the rate of the defects formation is memorized and in the third operation, the kind and type of the formed defects are memorized.
  • the length of the woven fabric is also sensed, successively, by a detecting element 4, and periodic signals corresponding to the detected woven length are converted into corresponding periodic electric signals so as to be brought into the memory 3 for memorization.
  • the output of the memory 3 is next brought into a comparator element 6 connected to the memory 3 and compared with informational data brought thereinto from a reference information source 7. This comparison is performed as to the total count of defects per unit length of the fabric, the rate of defect formation and kind and type of the formed defects. When the total count of defects exceeds the allowable limit or the rate of defect formation becomes abnormal, then the comparator element 6 issues signals actuating an operational terminal 8 whose function will be explained later in detail. The output of the memory 3 is also brought into a recording element 9 and the recorded results are used for locating the defecting portion on the fabric in the subsequent defects retrieving process.
  • FIGS. 2 and 3 an embodiment of the apparatus shown in FIG. 1 is illustrated.
  • a warp sheet 11 is shed by healds 12a and 12b, weft yarn is inserted into the opened shed, a reed 13 beats the inserted weftto a cloth fell of a woven fabric 14 and the woven fabric 14 is taken up by a surface roller 16 in a manner the same with the conventional weaving technique.
  • a detecting terminal 17 of the present invention includes a light source 18 extending over an entire width of the fabric 14 for radiating light towards the fabric 14 from an underside direction and a light receiver 19 disposed in an arrangement receptive of light reflected from the fabric 14.
  • the light source 18 radiates light of a constant luminous quantity per unit length of time and the weaving operation is advanced at a constant rate, the presence of defects on the fabric naturally causes variations in the quantity of light received by the light receiver 19.
  • the received luminous quantity is converted into corresponding electric signals by a photoelectric converter 21, and the photoelectric converter 21 generates pulses only when the received luminous quantity varies due to detection of the defects on the fabric 14.
  • the generated pulses are brought into a pulse motor 22 of the memory 3, which motor is connected to the photoelectric converter 21 and rotatable by a predesigned rotational angle upon receipt of the pulses.
  • the composition of the detecting terminal 17 is not limited only to the abovedescribed arrangement. For example, a luminous scanning method can advantageously be employed. Also, a more detailed version of the detecting terminal is disclosed for example in US. Pat. No. 3,1 16,621.
  • the woven length-detecting element 4 in cludes a woven length-detecting terminal 23 and a photoelectric converter 24 connected thereto.
  • the woven length detecting terminal 23 includes a disc 26 axially secured on a rotational shaft 27 of the surface roller 16. This disc 26 is provided with a plurality of radially formed apertures 28 of a concentric disposition. Sandwiching the disc 26 in a spaced relationship, a light source 29 and a light receiver 31 are disposed in a facing disposition, both members being stationary to the framework of the loom (not shown). The light source 29 always radiates a light of a constant luminous quantity towards the light receiver 31.
  • the memory 3 further includes a dial plate 33, a length indicator 34 centrally and rotationally disposed to the dial plate 33, a defect indicator 36 centrally disposed to the dial plate 33 in a coaxial arrangement with the length indicator 34. Rotation of the defect indicator 36 is actuated by the pulse motor 22 independently from that of the length indicator 34 actuated by the pulse motor 32. In combination with the above-listed indicators 34 and 36, a stationary abutment 37 is disposed on the dial plate 33.
  • the dial plate 33 is provided with two sets of scale marks, the outer marks being used for the length indicator 34 and the inner marks being used for the defect indicator 36.
  • both of the indicators 34 and 36 are rotated by predesigned rotational angles, in counterclockwise direction in the drawing, upon receipt of the respective pulses so as to memorize the count of defects and the length of the woven fabric in accumulative manners.
  • the angular phase difference 0, between the starting angular positions of the length indicator 34 and the stationary abutment 37 is selected so as to correspond to a length of one piece fabric.
  • the initial starting position of the defect indicator 36 is behind that of the length indicator 34 by an angular phase difference 0 which difference corresponds to a total allowable count of defects per one-piece length of the fabric.
  • the memory 3 issues an instruction signal to the comparator element 6.
  • the comparator element 6 is previously provided with informational data from the reference information source 7 con nected thereto, which informational data concerns the kind and the type of the defects and rate of defect formation. Using thusly provided informational data, the comparator element 6 has a function of distinguishing if the formed defects are repairable in the subsequent defects-retrieving process. Even when the detected total count of defects is so great that the resultant fabric cannot be classified into A-grade, the comparator element 6 does not issue signals for stopping the loom if the detected defects are distinguished as easily repairable in the subsequent defects-retrieving process. Owing to this distinguishing faculty of the comparator element 6, the productivity of the loom can be enhanced considerably.
  • the comparator element 6 issues signals actuating the operational terminal 8, which terminal includes a mechanism 38 for effecting the running of the loom, a mechanism 39 for effecting marking the cut mark on the fabric, a mechanism 41 for turning on and off the alarm lamp for operators and a mechanism 42 for returning the indicators 34 and 36 to their initial starting positions.
  • each such mechanism may include a relay for effecting electrical control, or a solenoid device for effecting mechanical control.
  • the comparator element 6 is provided with a faculty of distinguishing the rate of defect formation and receiving reference informational data of this kind from the reference information source 7. Therefore, even if the accumulated count of defects do not reach the allowable limit, the comparator element 6 issues signals for actuating the operational terminal 8 when an extraordinarily high rate of defeet formation is recognized. Owing to this distinguishing faculty of the comparator element 6, an adequate maintenance can be applied to the loom so as to eliminate the causes of such defect formation, thereby resulting in an increase in the yield of A-grade fabrics.
  • the recording element 9 is connected to the output terminal of the memory 3 so as to record the results accumulatively memorized by the memory 3.
  • a recording tape may be used for this purpose. This recording tape is then brought to the subsequent fabric inspection and defect-retrieving process and used for automatically locating the defected portion of the fabric.
  • a method for producing fabrics of high quality with considerably enhanced productivity on a weaving loom comprising the steps of detecting counts of fabric defects by optical means, converting thusly detected counts of defects into corresponding electric defect signals, memorizing said electric defect signals in an accumulative manner, simultaneously detecting woven length measurements of said fabric by optical means, converting said detected length measurements into corresponding length signals, memorizing said electric length signals in an accumulative manner, comparing said accumulatively memorized defect signals and length signals with given reference information data, and generating instruction signals operative on said weaving loom when said accumulatively memorized total count of defects exceeds an allowable limit in proportion to said reference data.
  • An apparatus for producing fabrics of high quality with considerably enhanced productivity on a weaving loom comprising, in combination, defect-detecting means disposed in the vicinity of a fabric being woven on said loom for detecting the presence of defects on said fabric, length-detecting means disposed in relation to a fabric takeup mechanism of said loom for detecting unit woven lengths of said fabric, memory means receptive of output signals of said two detecting means so as to memorize said signals in an accumulative manner, comparator means receptive of output signals from said memory, a reference information source connnected to said comparator means for supplying informational reference data to said comparator means, said comparator means being for generating instruction signals in response to said memory means and reference information signals, and operational means receptive of said instruction signals from said comparator means for controlling said loom; said comparator element generating said instruction signals when said accumulatively memorized count of defects exceeds an allowable limit.
  • said defectdetecting means includes a luminous-type defect-detecting device and a photoelectric converter for converting detected luminous defect signals into corresponding electric defect signals.
  • said defectdetecting device includes a light source for radiating light of a constant luminous quantity towards said fabric and a light receiver receptive of light reflected from said fabric.
  • said lengthdetecting means includes a luminous length-detecting means for generating luminous length signals, and a photoelectric converter for converting said luminous length signals into corresponding electric length signals.
  • said length-detecting means includes a rotational shaft of a surface roller of said loom, and a disc secured to said shaft and provided with a plurality of concentrically formed apertures, a stationary light source spacedly disposed on one side of said disc and radiating light of a constant luminous quantity, and a light receiver spacedly positioned on another side of said disc in an arrangement receptive of light arriving thereto through said apertures of said disc.
  • said memory includes a first pulse motor rotational by a predetermined rotational angle upon receipt of output signals of said defect-detecting means, a defect indicator rotated by said pulse motor, a second pulse motor rotational by a predetermined rotational angle upon receipt of output signals of said woven length-detecting means, a length indicator rotated by said second pulse motor, a dial discon which said two indicators are centrally, rotationally and coaxially disposed, and an abutment for stopping rotation of said indicators.
  • said operational means includes a mechanism for controlling the running of said loom, a mechanism for controlling the marking of cut marks on said fabric, a mechanism for controlling an alarm lamp, and a mechanism for controlling the returning of the disposition of said memory to an initial position.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Looms (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
US883172A 1968-12-10 1969-12-08 Method and apparatus for producing fabrics of high quality with considerably enhanced productivity Expired - Lifetime US3613743A (en)

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Application Number Priority Date Filing Date Title
JP43090483A JPS502673B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1968-12-10 1968-12-10

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US (1) US3613743A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS502673B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH508755A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1961710A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2025829A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1298953A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967656A (en) * 1974-03-07 1976-07-06 Nissan Motor Co., Ltd. Method of and device for controlling a weaving loom
US3977441A (en) * 1970-08-26 1976-08-31 Elitex, Zavody Textilniho Strojirenstvi Generalni Reditalstvi Device for recording weaving faults
US4067365A (en) * 1975-03-06 1978-01-10 Miyuki Gotoh Apparatus of stopping operation of a weaving loom
US4146061A (en) * 1977-03-05 1979-03-27 Nissan Motor Company, Limited Method of and apparatus for marking woven fabric with indicia during weaving of the woven fabric
US4183381A (en) * 1977-06-29 1980-01-15 Nissan Motor Company, Limited Method of and device for detecting an improper pick of weft yarn in a weaving loom
US4384596A (en) * 1981-01-07 1983-05-24 Leesona Corporation Means and method for sensing loom conditions indicative of potential fabric defects
US4643230A (en) * 1984-04-24 1987-02-17 Zellweger Uster, Ltd. Method and apparatus for the automatic monitoring of textile fabrics, especially woven fabrics
US4702283A (en) * 1985-06-26 1987-10-27 N.V. Weefautomaten Picanol Process and apparatus for inspecting woven fabric during its production on one or more looms
US4707887A (en) * 1984-10-05 1987-11-24 Trutzschler Gmbh & Co. Kg Apparatus for detecting foreign bodies, such as pieces of metal or the like, in textile fiber bales
EP0307025A1 (en) * 1987-09-02 1989-03-15 Picanol N.V. Method for monitoring warp breaks on weaving machines, and a device which uses this method
US4835699A (en) * 1987-03-23 1989-05-30 Burlington Industries, Inc. Automated distributed control system for a weaving mill
US5225988A (en) * 1990-07-10 1993-07-06 Tiziano Barea Device for controlling the operation of machines, particularly textile machines, able to self-learn the operating cycle of these latter and to correct its own errors during this self-learning stage
US6987867B1 (en) * 1997-09-15 2006-01-17 Uster Technologies Ag Process for evaluating data from textile fabrics

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51136964A (en) * 1975-05-20 1976-11-26 Nissan Motor Loom stopping device
JPS5414645U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1977-07-05 1979-01-30
JPS5636917A (en) * 1980-03-31 1981-04-10 Shiyouzou Yamada Chopstick case for common use
GB2144219B (en) * 1983-07-16 1988-05-25 Nat Res Dev Inspecting textile products
DE3426056A1 (de) * 1983-07-16 1985-01-24 Leicester Polytechnic, Leicester Verfahren und vorrichtung zur kontrolle von textilien
GB8331248D0 (en) * 1983-11-23 1983-12-29 Kearney & Trecker Marwin Ltd Inspecting articles
JPH10503245A (ja) * 1993-11-24 1998-03-24 レテヒ、アクチエンゲゼルシャフト、ハー．フォン、アルクス 織布における欠陥の追跡方法
DE10123870A1 (de) * 2001-05-16 2003-05-15 Opdi Tex Gmbh Vorrichtung zur automatischen Überwachung von Flächengebilden, insbesondere textilen Gewebebahnen an der Produktionsmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3116621A (en) * 1960-09-02 1964-01-07 Fabric Res Lab Inc Fabric flaw detector
US3276227A (en) * 1964-03-21 1966-10-04 Isco Wirkwarenfabrik Flaw tester for textile machines
FR1515876A (fr) * 1966-07-18 1968-03-08 Louis Lepoutre & Cie S A Dispositif d'asservissement de la vitesse de machines textiles au taux de casse des fils
US3409779A (en) * 1965-11-02 1968-11-05 Appalachian Electronic Instr Hole detector having logic circuitry for seam skipping
US3459235A (en) * 1967-06-07 1969-08-05 Burlington Industries Inc Means for determining stops of a loom or the like

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3116621A (en) * 1960-09-02 1964-01-07 Fabric Res Lab Inc Fabric flaw detector
US3276227A (en) * 1964-03-21 1966-10-04 Isco Wirkwarenfabrik Flaw tester for textile machines
US3409779A (en) * 1965-11-02 1968-11-05 Appalachian Electronic Instr Hole detector having logic circuitry for seam skipping
FR1515876A (fr) * 1966-07-18 1968-03-08 Louis Lepoutre & Cie S A Dispositif d'asservissement de la vitesse de machines textiles au taux de casse des fils
US3459235A (en) * 1967-06-07 1969-08-05 Burlington Industries Inc Means for determining stops of a loom or the like

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977441A (en) * 1970-08-26 1976-08-31 Elitex, Zavody Textilniho Strojirenstvi Generalni Reditalstvi Device for recording weaving faults
US3967656A (en) * 1974-03-07 1976-07-06 Nissan Motor Co., Ltd. Method of and device for controlling a weaving loom
US4067365A (en) * 1975-03-06 1978-01-10 Miyuki Gotoh Apparatus of stopping operation of a weaving loom
US4146061A (en) * 1977-03-05 1979-03-27 Nissan Motor Company, Limited Method of and apparatus for marking woven fabric with indicia during weaving of the woven fabric
US4183381A (en) * 1977-06-29 1980-01-15 Nissan Motor Company, Limited Method of and device for detecting an improper pick of weft yarn in a weaving loom
US4384596A (en) * 1981-01-07 1983-05-24 Leesona Corporation Means and method for sensing loom conditions indicative of potential fabric defects
US4643230A (en) * 1984-04-24 1987-02-17 Zellweger Uster, Ltd. Method and apparatus for the automatic monitoring of textile fabrics, especially woven fabrics
US4707887A (en) * 1984-10-05 1987-11-24 Trutzschler Gmbh & Co. Kg Apparatus for detecting foreign bodies, such as pieces of metal or the like, in textile fiber bales
US4702283A (en) * 1985-06-26 1987-10-27 N.V. Weefautomaten Picanol Process and apparatus for inspecting woven fabric during its production on one or more looms
US4835699A (en) * 1987-03-23 1989-05-30 Burlington Industries, Inc. Automated distributed control system for a weaving mill
EP0307025A1 (en) * 1987-09-02 1989-03-15 Picanol N.V. Method for monitoring warp breaks on weaving machines, and a device which uses this method
BE1000899A4 (nl) * 1987-09-02 1989-05-09 Picanol Nv Werkwijze voor het kontroleren van kettingbreuken bij weefmachines, en inrichting die deze werkwijze toepast.
US4911207A (en) * 1987-09-02 1990-03-27 Picanol N. V. Method for monitoring warp breaks on weaving machines, and a device which uses this method
US5225988A (en) * 1990-07-10 1993-07-06 Tiziano Barea Device for controlling the operation of machines, particularly textile machines, able to self-learn the operating cycle of these latter and to correct its own errors during this self-learning stage
US6987867B1 (en) * 1997-09-15 2006-01-17 Uster Technologies Ag Process for evaluating data from textile fabrics

Also Published As

Publication number Publication date
DE1961710A1 (de) 1970-07-02
JPS502673B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-01-28
CH508755A (de) 1971-06-15
GB1298953A (en) 1972-12-06
FR2025829A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-09-11

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