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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