Rectangular nose hole in staggered row (NLCZ)

Perforation mark: NLC (w*l) Z(t1*t2)

Note: This perforation is used to make the Peterson sieve – a new model.
  • w – width of the hole
  • l – length of the hole
  • l1 – length of the bridge hole – at the top
  • h – height of the hole – drawn part of the hole
  • t1 i t2 – perforation step
  • c1 i c2 – perforation bridge

Round nose hole in staggered row (NRZ)

Perforation mark: NR (w*l) Z(t1*t2)

Note: This perforation is used to make the Peterson sieve – the old model.
  • w – width of the hole
  • l – length of the hole
  • l1 – length of the bridge hole – at the top
  • h – height of the hole – drawn part of the hole
  • t1 i t2 – perforation step
  • c1 i c2 – perforation bridge

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Nose holes (pdf).

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