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Home February 08, 2010

Surface Prep
Carton/Box
- Folding / Gluing
- Sheeting
Coat/Laminate
Controls
Web Handling
Slit
- Knives
Print
- Inks
- Prepress
- Digital
- Flexography
- Gravure
- Letterpress
- Offset
- Envelope
Flexpack
- Substrates
Label/Tape
- RFID
Bag/Pouch
Die-Cut

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Foray to the Future
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The Long & the Short of Web Bending

Published Monday, September 01, 2003

Last month I reviewed the parallel entry principle (PEP), how a web wants to “go with the flow” of a roller's surface. This month I want to expand your understanding of the parallel entry principle, explaining where the force to bend the web comes from and how to use this knowledge to your advantage. With parallel, cylindrical rollers, the PEP keeps your web on machine centerline. But our webs don't always stay in their lanes, and sometimes we don't want them to. Unwinding and misaligned rollers will put the web in the wrong lane, and we have to ...

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