Product category:
Label converting and sleeving materials, equipment and services
News Release from: Rotoflex Tooling
Edited by the Manufacturingtalk Editorial
Team on 06 June 2007
Inline Versus Offline Inspection.
There are various criteria converters must consider when selecting a web inspection system, beginning with which type to specify- inline, offline, or both.
You'll see it in your bottom line if the vendors to whom you print packaging aren't completely happy with the end result, especially if what you printed doesn't match what they approved at the tail end of press qualification Today's web inspection systems have increased in sophistication to address the very specialized needs of several packaging categories, from food to pharmaceutical
This article was originally published on Manufacturingtalk on 14 Mar 2007 at 8.00am (UK)
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There are various criteria converters must consider when selecting a web inspection system, beginning with which type to specify-inline, offline, or both.
Inline vs.
Offline Inspection Systems "Inline is on press-that's for quality control in the printing process".
Further reading
Des Moines firm invests in digital labels
Label Advantage, a custom manufacturer of labels and tags, has been using Rotoflex's Vericut 2 for reliable digital label production.
Consistent and repeatable roll tension
Rotoflex has introduced a slitting and rewinding machine with variable tension levels to produce quality rolls at top speeds.
"Offline is for security".
"So after it's printed, the offline examines every label after it's printed," says Kevin Gourlay, sales manager, Rotoflex".
""Principally, when you're running the press, you can't stop the press".
"When it [inspection system] triggers, and you see it's off, you mark it-electronically, automatically, or by hand".
"So it makes the operator aware that it's out of register, so he pays attention to it; or something's not right, so he looks at it".
"So you hope you reduce the amount of waste by him being more attentive." Case in point-The Control Group installs Advanced Machine Vision System Over the past few years, FDA and other regulatory agency requirements have become increasingly stringent, requiring the highest accuracy and security in pharmaceutical and medical product labeling.
The Control Group, a New Jersey-based pharmaceutical manufacturer of flexographic labels and flexible packaging has met this challenge by installing Advanced Machine Vision Technology from Rotoflex International.
The Control Group has three divisions and 10 presses.
Major product categories include flexible packaging films, labels, and package inserts for pharmaceutical, health care, cosmetic, and consumer packaging applications.
Advanced Machine Vision System uses a reference-based inspection method for quality control.
During a "Learn" process, the system stores a known good image and then compares it with each consecutive image using tolerance for color deviation, registration, and defect size.
All interaction with the vision system is done via an intuitive Human Machine Interface (HMI).
The system identifies the defects on a monitor, so the operator can quickly locate and verify the problem.
The vision system provides high-level quality control by identifying various faults including color defects, oil defects, missing print, color changes, register movement between colors, register movement print to diecut, missing labels, matrix, splice, and flags.
The Control Group uses the vision technology mounted directly on a Rotoflex VSI eDrive inspection rewinder.
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