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 Isoten is the leader in supplying vacuum belts for applications within the converting industry. The principles of operation are very similar to those of a vacuum roll. Vacuum belts pull a web into intimate contact with the belt surface to greatly increase the friction forces that prevent slippage. The result is a highly effective tension device that requires almost zero wrap angle.
Useful characteristics of a vacuum belt include:
- Contacts web on single side only
- Handles large tension differentials without slipping
- Works at extremely low tensions
- Accommodates minimal wrap angles
- Removes boundary air as web contacts belt
Standard Product
Useful characteristics of a vacuum belt include:
- Contacts web on single side only
- Handles large tension differentials without slipping
- Works at extremely low tensions
- Accommodates minimal wrap angles
- Removes boundary air as web contacts belt
Options
Standard options include the following:
- Vacuum zone width adjustment via double threaded lead screw and positioner handwheel with indicator dial
- Vacuum supply system, sized to match application, using fan or regenerative blower as vacuum source
- Contact Tech Sales Co., for other custom arrangements to suit your application
 Benefits of Replacing Nip Rolls & S-Wraps
Simply replacing traditional tension devices with vacuum products can yield significant benefits.
- Improve safety
- Reduce scrap by avoiding scratches, imprints, wrinkles, and slippage
- Save operating time by eliminating nip adjustments and manual nip closures
- Operate at higher speeds because boundary air is removed
Examples of Special Applications
Vacuum Tension Rolls and belts become especially cost-effective when other useful characteristics are understood and used to advantage.
Transport Wet Webs
- Single side contact allows tension control with web wet on one side
- A classic application for Vacuum Tension Rolls is between coater and dryer
Handle Lightweight Films
- Positive grip even at very low tension minimizes web stretching & breaks
Deal with Web Breaks
- Use Vacuum Tension Rolls to hold web despite break so less threading is required for restart, or to initiate alternate path when web break is detected
Implement Short-Term or Constant Loops
Use Vacuum Tension Rolls to accumulate web for metered start-stop or a standing loop
Meter & Draw a Web
- One roll holds web while other vacuum roll pulls for a metered distance
Release Web from Tenter Frame
- Meets requirement for very low tension at tenter chain release point
Unique, Process-Specific Applications
- Contact CCR to discuss your proprietary application under a confidentiality agreement
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