Apparatus for determining fiber directionality in moving web structures
US T932008 I4
Description (OCR text may contain errors)
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.