초록

A system for the characterization of webs that permits the identification of anomalous regions on the web to be performed at a first time and place, and permits the localization and marking of actual defects to be performed at a second time and place.

대표청구항 ▼

1. A method of analyzing a web of material containing at least two anomalies, comprising: receiving the web of material having upon it regularly spaced fiducial marks that uniquely identify a plurality of distinct positions on the web;receiving digital information that identifies regions on the web

1. A method of analyzing a web of material containing at least two anomalies, comprising: receiving the web of material having upon it regularly spaced fiducial marks that uniquely identify a plurality of distinct positions on the web;receiving digital information that identifies regions on the web containing the at least two anomalies, and positional information defining the positions of the identified regions relative to at least one of the fiducial marks; and as part of a web operation that is temporally distinguished from web operations that yielded the digital information and separated by at least a winding step whereby the web of material is wound onto a roll, unwinding the web and applying locating marks to the web identifying the position of at least one of the identified regions, using the positional information and the fiducial marks as a guide. 2. The method according to claim 1, further comprising: storing or buffering the digital information describing the identified regions;receiving input defining the constituents of an anomaly that is a defect with respect to a contemplated end use of the web;processing the digital information describing the identified regions to identify at least one identified region that qualifies as an actual defect with respect to the contemplated end use of the web, and to identify at least one identified region that does not qualify as an actual defect with respect to the contemplated end use of the web;and wherein the locating mark is applied to identify the position of only the at least one identified region that qualifies as an actual defect with respect to the contemplated end use of the web. 3. The method according to claim 2 wherein: processing the digital information describing the identified regions comprises analyzing the identified regions with an algorithm to determine at least one identified region that qualifies as an actual defect with respect to the contemplated end use of the web, wherein the algorithm is not the same as any that might have been used to determine the identified positions. 4. The method according to claim 2 wherein the locating marks are on or adjacent to the anomalies whose position they identify. 5. The method according to claim 2 wherein the locating marks are spaced in a predetermined way from the anomalies whose position they identify.