There are a lot of variables in your situation, which raises a number of questions. What is the root cause of the empty bottles? Why are the preventive measures on the line (vision and checkweigher) not working effectively? What are the contents of the bottle (solid dose, liquid, powder) and what is the weight of the content relative to the bottle? Is this line validated? If so, this should not be happening.

I’d be glad to talk to you directly about this if you wish. I can be reached at 763/425-8808.

In order to verify label flatness and integrity, a dark field illuminator should be used to highlight curling or wrinkles. These areas will appear as shadowed or dark in a machine vision image. Acceptable parameters can be based on process control methods utilizing thresholds set for maximum number of pixels.

In addition, a machine vision system can inspect for proper label positioning, proper label content, and color.