US3419723A - Apparatus for checking a web of material as to uniformity - Google Patents

Apparatus for checking a web of material as to uniformity Download PDF

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Publication number
US3419723A
US3419723A US508192A US50819265A US3419723A US 3419723 A US3419723 A US 3419723A US 508192 A US508192 A US 508192A US 50819265 A US50819265 A US 50819265A US 3419723 A US3419723 A US 3419723A
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US
United States
Prior art keywords
web
guide surface
checking
uniformity
fabric
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.)
Expired - Lifetime
Application number
US508192A
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English (en)
Inventor
Germans Fedde Hendrik
Vos Pieter Rense
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KONINKLIJKE NEDERLANDSE TEXTIEL UNIE NV
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KONINKLIJKE NEDERLANDSE TEXTIEL UNIE NV
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Publication of US3419723A publication Critical patent/US3419723A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H3/00—Inspecting textile materials
    • D06H3/08—Inspecting textile materials by photo-electric or television means

Definitions

  • This invention relates to an apparatus for checking a web of material as to uniformity, particularly for checking cloth as it comes from the loom, such apparatus being designed for checking webs of woven fabrics both as to uniformity of thickness, and of position, and of sequence of the warp and weft threads.
  • an apparatus for checking a web of material as to uniformity which comprises a guide surface having a straight generatrix for guiding the web of material to be checked across said surface parallel to the generatrix thereof, there being provided on the axis of a circular-arcuate cross-section of said guide surface a mirror rotatable about said axis for reflecting light, transmitted via a lighttransmitting zone located on said circular-arcuate crosssection, or emitted by a source of light disposed concentrically about said cross-section, to one or a plurality of photomultipliers for sensing the web to be checked.
  • an apparatus for checking a web of fabric may be equipped with two photomultipliers, each provided with a slot-type diaphragm, the diaphragm of one photomultiplier being directed parallel to the warp threads, and the diaphragm of the other photomultiplier being directed parallel to the weft threads of the web of fabric to be checked.
  • FIG. 1 illustrates the guide surface with a web of fabric moving across it
  • FIG. 2 is a plan view of the guide surface and the web of fabric
  • FIG. 3 is a cross-section on the line III-III in FIG. 2.
  • the apparatus shown is equipped with an ellipsoidal opaque guide surface 1 with a straight generatrix, so that when a web of fabric 2 is guided in the direction P and at right angles to the generatrix of the guide surface 1, the position of the warp and weft threads relative to each other is not changed.
  • the guide surface 1 is in the form of a part of a cylinder having an ellipse for a directrix.
  • a slot A-A Formed on a circular-arcuate cross-section of the guide surface 1, i.e., in the form of an arc of a circle, having an axis 3, is a slot A-A.
  • the axis 3 coincides with the axis of rotation of a rotary mirror 4, which cooperates with two photomultipliers 5 and 6, disposed on opposite sides of the axis of rotation of the mirror 4.
  • a source of light 7 Disposed above the slot A-A, which is in the form of a circular arc, and positioned concentrically therewith is a source of light 7, which is likewise in the form of a circular arc.
  • the photomultiplier 5 designed to record the warp threads, with a slot diaphragm directed parallel to the warp threads
  • the photomultiplier 6 designed to record the weft threads, with a slot diaphragm directed parallel to the weft threads.
  • the opaque guide surface 1 provided with a slot A-A may be replaced with a fully transparent guide surface, provided the arcuate source of light and the axis of rotation of the rotary mirror are set in their proper positions.
  • An apparatus for checking a web of fabric as to uniformity which comprises means providing a convex cylindrical guide surface having a straight generatrix for guiding the web of material to be checked across said surface parallel to the generatrix thereof, a circular arcuate band-like zone of the guide surface transmitting light therethrough, a mirror positioned inwardly of the guide surface on the axis of said circular arcuate bandlike zone, a light source positioned outwardly of the guide surface for passing light through the web and the circular arcuate band-like zone of the guide surface, means to rotate the mirror about the axis of the circular bandlike zone, and a photo sensitive means disposed Within the guide surface for receiving light reflected thereto by the mirror for sensing the light transmitting propertie of the web to be checked.
  • An apparatus comprising two photo sensitive means within the guide surface, said two photo sensitive means being disposed at different angles about the axis of the circular band-like light transmitting zone of the guide surface providing means, one of said photo sensitive means being receptive predominantly to light directed parallel to the warp threads of the web of fabric to be checked, and the other of said photo sensitive means being receptive predominantly to light directed parallel to the weft threads of such web of fabric.
  • photo sensitive means are photoelectric cells, each cell with a slot-type diaphragm, said diaphragms being directed, respectively, parallel to the warp threads and parallel to the weft threads of the fabric to be checked.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
US508192A 1964-11-12 1965-11-09 Apparatus for checking a web of material as to uniformity Expired - Lifetime US3419723A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6413193A NL6413193A (enrdf_load_stackoverflow) 1964-11-12 1964-11-12

Publications (1)

Publication Number Publication Date
US3419723A true US3419723A (en) 1968-12-31

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ID=19791436

Family Applications (1)

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US508192A Expired - Lifetime US3419723A (en) 1964-11-12 1965-11-09 Apparatus for checking a web of material as to uniformity

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US (1) US3419723A (enrdf_load_stackoverflow)
DE (1) DE1560077A1 (enrdf_load_stackoverflow)
NL (1) NL6413193A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534402A (en) * 1967-12-15 1970-10-13 Honeywell Inc Apparatus for determining the uniformity of web material
US3748482A (en) * 1970-06-08 1973-07-24 Agfa Gevaert Nv Device for the detection of irregularities in a material
US11746471B2 (en) 2016-11-23 2023-09-05 Ibs Of America Monitoring system, control system, and actuation assembly of a paper machine, and a method of controlling
US11920299B2 (en) 2020-03-06 2024-03-05 Ibs Of America Formation detection system and a process of controlling

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2836280C3 (de) * 1978-08-18 1981-04-30 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Optische Abtastvorrichtung für kontinuierlich fortbewegte Materialbahnen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2209220A (en) * 1939-06-29 1940-07-23 Gen Electric Weft straightener
US2219213A (en) * 1939-10-14 1940-10-22 Utica Willowvaie Bleaching Com Method and apparatus for correcting bow in woven material
US2966593A (en) * 1957-04-02 1960-12-27 Leimer Albert Method and apparatus for inspecting the structure of fabrics
US3193688A (en) * 1960-12-22 1965-07-06 American Cloth Strait Company Photosensitive weft straightener and alignment detector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2209220A (en) * 1939-06-29 1940-07-23 Gen Electric Weft straightener
US2219213A (en) * 1939-10-14 1940-10-22 Utica Willowvaie Bleaching Com Method and apparatus for correcting bow in woven material
US2966593A (en) * 1957-04-02 1960-12-27 Leimer Albert Method and apparatus for inspecting the structure of fabrics
US3193688A (en) * 1960-12-22 1965-07-06 American Cloth Strait Company Photosensitive weft straightener and alignment detector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534402A (en) * 1967-12-15 1970-10-13 Honeywell Inc Apparatus for determining the uniformity of web material
US3748482A (en) * 1970-06-08 1973-07-24 Agfa Gevaert Nv Device for the detection of irregularities in a material
US11746471B2 (en) 2016-11-23 2023-09-05 Ibs Of America Monitoring system, control system, and actuation assembly of a paper machine, and a method of controlling
US11920299B2 (en) 2020-03-06 2024-03-05 Ibs Of America Formation detection system and a process of controlling

Also Published As

Publication number Publication date
DE1560077A1 (de) 1969-07-17
NL6413193A (enrdf_load_stackoverflow) 1966-05-13

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