Inspecting glass containers for line-over finish defects with bifurcated fiber optic bundle
Patent 4929828 Issued on May 29, 1990. Estimated Expiration Date: 
February 29, 2008. 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.
February 29, 2008. 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 References 3098564 3176842 3349906 3639067 3739184 3851975 3880750 Needle detector for circular knitting machines Flaw detector Device for testing the rims of bottle apertures for flaws InventorAssigneeApplicationNo. 161623 filed on 02/29/1988US Classes:250/223B, Bottles209/524, Sensing radiant energy reflected, absorbed, emitted, or obstructed by item or adjunct (e.g., label, cap, etc.) thereof250/227.29With specific illumination or viewing orientation of light conductor relative to viewed object (e.g., light normal to, and detector at 45 degree angle to, viewed object)ExaminersPrimary: Nelms, David C.Assistant: Messinger, Michael Attorney, Agent or FirmForeign Patent References
International ClassesG01N 009/04B07C 005/00 AbstractApparatus for detecting line-over defects at the finish of a glassware container. A bifurcated fiber optic bundle includes sender and receiver fiber branches; one of the branches terminates at a modulated visible red high intensity LED light source, the other at a photosensor. The non-bifurcated, probe end of the fiber optic cable terminates in a rectangular pattern of sending and receiving fibers in a random mix. The probe end of the fiber optic bundle is positioned directly over the container finish and pointed straight down. An intervening lens assembly produces a focused 1:1 image of the rectangular pattern at the bottle finish with the long axis of the rectangle oriented radially across the finish. An electronic assembly modulates the LED, demodulates the photodetector output, and detects sharp reductions in the intensity of light reflected back to the receiver fibers, indicative of line-over defects. | |
