On-line web inspection system
Patent 4237539 Issued on December 2, 1980. Estimated Expiration Date: 
December 2, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 2, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorsAssigneeApplicationNo. 05/853421 filed on 11/21/1977US Classes:702/35, Flaw or defect detection250/559.39, With comparison to reference or standard250/559.48, With transversal scan356/430, For flaws or imperfections382/141, Manufacturing or product inspection382/224, Classification702/85CALIBRATION OR CORRECTION SYSTEMExaminersPrimary: Krass, Errol A.International ClassesG01N 21/89 (20060101)G01N 21/88 (20060101) AbstractAn automatic on-line computer-aided inspection system for a running web utilizing a transverse web scanning means, detection means incorporating feature extraction and processing circuitry for generating unique output signals corresponding to said web scanning characteristic of web features of inspection interest, means converting the output signals to digital data words input sequentially to a digital computer, said computer applying one or more algorithms to said words, thereby calibrating the values of said features of said words, comparing said calibrated feature values to at least one set of product-qualifying values held in memory, and means responsive to the computer classifying the web as acceptable or non-acceptable as regards areas of preselected marketable size in the web. | |
