Calibrated Length Measurement of Paper and Fleece

Calibrated measurement of roll lengths and area on paper and fleece

When selling paper and nonwovens in the EU, the length or area measurement must be done with calibrated length measurement devices. Disturbing factors such as slippage of the measuring unit at high speeds, the influence of the material thickness and the material structure must be avoided in order to follow the required tolerances within the EU. Thus, the use of non-contact calibrated length measurement systems is advised. ELOVIS offers a complete solution including temperature and laser protection, printer connection and interface for operating data collection. Width measurement can be done on the finished cut roll with embodied measuring means. The combination of length and width gives the sales-relevant area or square size measure and thus allows the only legally secure value determination when selling by area or square size.

Typical application data:

  • Path Velocity: typically up to 3,600 m / min
  • Measurement accuracy with tactile measuring equipment or via drive: typically 1 – 5%
  • Measurement accuracy with non-contact length measurement μSPEED: typically 0.03%
  • Amortization: 1 month, direct encoder replacement, no other modifications needed

Material examples:

  • Graphical paper, carbonless paper, thermal paper, filter paper, wallpaper, decorative paper, …
  • Raw paper, coated paper, uncoated paper, machine smooth, satin, …
  • Cardboard, Tissue Paper, Hygiene Paper, … all basis weights and grammages
  • nonwoven, technical nonwoven, insulation materials, glass fiber fleece, spunbond spunlace, felt, …
  • Nonwoven fabric, filter fleece, roof underlayment, heat / impact sound insulation, geo-fleece, …

Machines equipped with non-contact length measurement:

  • Paper machine on tambour
  • Roll cutting machine, roll cutter, cross cutter, lengthwise cutter
  • Winding machines, rewinder, re-roller, doctor roller, sorting cross cutter
  • Coating machine, calender, laminating machine, …
Contact-free length measurement by laser encoder

Matching Products and Services

Length & Speed Measurement Systems

  • Non-contact length and speed measurement, optically by laser
  • Length and speed free of slippage, maintenance-free, permanently calibrated and accurately measured
  • The Laser-Encoder replaces tactile measurement via impeller, wheel, measurement roller, or machine drive
  • Measurement of agitated surfaces via laser-doppler surface velocimeter

ELOVIS Services

ELOVIS offers the following services for the calibrated measurement of paper and fleece:

  • Consultation on calibrated length and speed measurement
  • Measurement & calibration services
  • Help with length complaints of your customers
  • OEM sensor developments in the field of length and speed measurement

Always available for you:
Bernd Engelsdorf


Vincenz-Prießnitz-Straße 1
76131 Karlsruhe, Germany

T +49 721 933823-0
F +49 721 933823-23

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