UST932008I4 - Apparatus for determining fiber directionality in moving web structures - Google Patents

Apparatus for determining fiber directionality in moving web structures Download PDF

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Publication number
UST932008I4
UST932008I4 US48781674A UST932008I4 US T932008 I4 UST932008 I4 US T932008I4 US 48781674 A US48781674 A US 48781674A US T932008 I4 UST932008 I4 US T932008I4
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Prior art keywords
fiber
directionality
light
moving web
fiber directionality
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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
    • G01N21/86—Investigating moving sheets

Definitions

  • the apparatus uses a fiber property of directional reflectance of collimated light to establish fiber position (direction). Collimatcd light is projected onto a web surface and the scattered reflected light is sensed by multiple optical sensors. Since light is reflected greatest perpendicular to the direction of the fiber axis, a measore of overall fiber directionality is obtained by comparing the pickup of strategically placed photo sensors.
  • the apparatus includes three sections: scanning heads for monitoring upper and lower web surfaces; electronic circuits to compare the signal outputs of the photo sensors in the scanning heads to obtain related values of fiber directionality; and a controlled power supply and illumination source. The degree of illumination is controlled by the general brightness of the material being measured so that a constant level of reflectance is maintaincd.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

AN APPARATUS TO DETERMINE FIBER DIRECTIONALITY IN MOVING WEB STRUCTURES. THE APPARATUS USES A FIBER PROPERTY OF DIRECTIONAL REFLECTANCE OF COLLIMATED LIGHT TO ESTABLISH FIBER POSITION (DIRECTION). COLLIMATED LIGHT IS PROJECTED ONTO A WEB SURFACE AND THE SCATTERED REFLECTED LIGHT IS SENSED BY MULTIPLE OPTICAL SENSORS. SINCE LIGHT IS REFLECTED GREATEST PERPENDICULAR TO THE DIRECTION OF THE FIBER AXIS, A MEASSURE OF OVERALL FIBER DIRECTIONALITY IS OBTAINED BY COMPARING THE PICKUP OF STRATEGICALLY PLACED PHOTO SENSORS. THE APPARATUS INCLUDES THREE SECTIONS: SCANNING HEADS FOR MONITORING UPPER AND LOWER WEB SURFACES; ELECTRONIC CIRCUITS TO COMPARE THE SIGNAL OUTPUTS OF THE PHOTO SENSORS IN THE SCANNING HEADS TO OBTAIN RELATED VALUES OF FIBER DIRECTIONALITY; AND A CONTROLLED POWER SUPPLY AND ILLUMINATION SOURCE. THE DEGREE OF ILLUMINATION IS CONTROLLED BY THE GENERAL BRIGHTNESS OF THE MATERIAL BEING MEASURED SO THAT A CONSTANT LEVEL OF REFLECTANCE IS MAINTAINED.

Description

DEFENSIVE PUBLICATION UNITED STATES PATENT AND TRADEMARK OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0.6. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered seriesand are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.
Defensive Publication applications have not been examined as to the merits or alleged invention. The Patent and Trademark Otncc makes no assertion as to the novelty of the disclosed subject matter.
PUBLISHED MARCH 4, 1975 E r i An apparatus to determine fiber directionality in moving web structures. The apparatus uses a fiber property of directional reflectance of collimated light to establish fiber position (direction). Collimatcd light is projected onto a web surface and the scattered reflected light is sensed by multiple optical sensors. Since light is reflected greatest perpendicular to the direction of the fiber axis, a measore of overall fiber directionality is obtained by comparing the pickup of strategically placed photo sensors. The apparatus includes three sections: scanning heads for monitoring upper and lower web surfaces; electronic circuits to compare the signal outputs of the photo sensors in the scanning heads to obtain related values of fiber directionality; and a controlled power supply and illumination source. The degree of illumination is controlled by the general brightness of the material being measured so that a constant level of reflectance is maintaincd.
March 4, 1975 1.. s. DAVIS ET AL T932308 APPARATUS FOR DETERMINING FIBER DIHECTIONALITY IN MOVING WEB STRUCTURES 3 SheetsSheet 1 Filed July 11, 1974 FIG.4
March 4, 1975 Filed July 11, 1974 L S. DAVIS ETAL APPARATUS ron DETERMINING FIBER DIRECTIONALI'IY n1 uovms WEB s-rnuc'runns 3 Sheets-Sheet 2 March 4. 1975 5, DAVIS ET AL T93Z,008
APPARATUS FOR DETERMINING FIBER DIRECTIONAL-1T1 IN uovme WEB STRUCTURES F1196 July 11, 1974 3 ShGQtS-Sheet 3 66 r r VV N 1 2 l I l I l J- ISVDC.
US48781674 1974-07-11 1974-07-11 Apparatus for determining fiber directionality in moving web structures Pending UST932008I4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US48781674 UST932008I4 (en) 1974-07-11 1974-07-11 Apparatus for determining fiber directionality in moving web structures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US48781674 UST932008I4 (en) 1974-07-11 1974-07-11 Apparatus for determining fiber directionality in moving web structures

Publications (1)

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UST932008I4 true UST932008I4 (en) 1975-03-04

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US48781674 Pending UST932008I4 (en) 1974-07-11 1974-07-11 Apparatus for determining fiber directionality in moving web structures

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0198037A1 (en) * 1984-10-29 1986-10-22 Weyerhaeuser Co Method for determining localized fiber angle in a three dimensional fibrous material.
US5640244A (en) * 1995-11-02 1997-06-17 Abb Industrial Systems, Inc. Method and apparatus for on-line determination of fiber orientation and anisotropy in a non-woven web
US5729349A (en) * 1995-02-10 1998-03-17 Ricoh Company, Ltd. Method and device for determining fiber orientation of paper, and apparatus for removing image forming substance from paper
WO2000004373A1 (en) * 1998-07-14 2000-01-27 Neles Paper Automation Oy Method and apparatus for optically measuring properties of a moving web
WO2008080602A1 (en) * 2006-12-29 2008-07-10 Isam Aktiengesellschaft Method for analyzing the surface of a work piece, especially of a lay of fibers and/or woven fibers
US8780360B2 (en) 2009-07-15 2014-07-15 Microtec S.R.L. Method and apparatus for identifying the orientation of wood fibres

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0198037A1 (en) * 1984-10-29 1986-10-22 Weyerhaeuser Co Method for determining localized fiber angle in a three dimensional fibrous material.
EP0198037A4 (en) * 1984-10-29 1988-05-19 Weyerhaeuser Co Method for determining localized fiber angle in a three dimensional fibrous material.
US5729349A (en) * 1995-02-10 1998-03-17 Ricoh Company, Ltd. Method and device for determining fiber orientation of paper, and apparatus for removing image forming substance from paper
US5852499A (en) * 1995-02-10 1998-12-22 Ricoh Company, Ltd. Method and device for determining fiber orientation of paper, and apparatus for removing image forming substance from paper
US5640244A (en) * 1995-11-02 1997-06-17 Abb Industrial Systems, Inc. Method and apparatus for on-line determination of fiber orientation and anisotropy in a non-woven web
WO2000004373A1 (en) * 1998-07-14 2000-01-27 Neles Paper Automation Oy Method and apparatus for optically measuring properties of a moving web
WO2008080602A1 (en) * 2006-12-29 2008-07-10 Isam Aktiengesellschaft Method for analyzing the surface of a work piece, especially of a lay of fibers and/or woven fibers
US8780360B2 (en) 2009-07-15 2014-07-15 Microtec S.R.L. Method and apparatus for identifying the orientation of wood fibres

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