Web marking and inspection system

Details Web marking and inspection system Web marking and inspection system

2007-11-20

2007-11-20

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C250S559440, C235S436000

Reexamination Certificate

active

10457206

ABSTRACT:
A method and apparatus for use with a web of material having a web length dimension and a web surface, the method for placing mark sequences on the web surface every X distance along the web length dimension identifying location along the web length dimension, the method comprising the steps of monitoring web location, every X distance, placing a sequence of N marks on the web surface along the web length wherein each two adjacent marks define a space length dimension and wherein the pattern of space length dimensions formed by the N marks in the sequence together specify a specific web length location. The invention also includes a marking and defect locating system including a high speed printer and a high resolution, high speed camera to facilitate the methods.

REFERENCES:
patent: 6170747 (2001-01-01), Meyer
patent: 6725123 (2004-04-01), Denuell
“iWinder”,Isys Technical Product Bulletin, Cognex Corporation,(Aug. 1996).
“iWinder”,Technical Manual, Cognex Corporation,(1998).

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