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Manuel Böhm

Manuel Böhm

Department
ID-cards & Print finishing

E-mail
boehm
transparent 11x15@fogra.org

Telephone
+49 89. 431 82 - 473


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Fogra perforation measurement device PM

The Fogra Perforation Measurement Device is a portable test device for the measurement of the tensile strength of perforated and unperforated paper samples.

PMApplications

- Determination of the tensile strength of the perforations of continuous stationery 
- Determination of the tensile strength of papers 
- Measurement of paper stretch

 

Please click on the picture to enlarge it.

 

Operational principle

A special cutting template can be used for the preparation of the paper samples. The samples are clamped by a clamp strip that produces a constant clamping force by means of an integrated spring system. The perforation measurement device is manually operated by means of a hand wheel. By turning this wheel the sample is stretched and torn. The tearing force can be read off a dial and the tensile strength is calculated by dividing the tearing force by the width of the sample. The relationship between load and stretch relationship of the sample can be determined by means of a second [optional] dial.

Features
  • Simple operation [no special knowledge required]
  • The basic configuration is mechanically operated [no need for electrical connection]
  • Articulated arrangement of the tension clamp produces even tensile load across the whole width
  • Jam free clamping of the sample
  • Results unaffected by friction despite horizontal test configuration
  • Protected against excessive force
  • Direct display of tearing force [maximum pointer]
  • Can also be used to determine the tensile strength of unperforated papers
  • Also possible to measure stretch if desired [optional extra]
  • Convenient and portable device
  • Fogra calibration service [with costs]


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