STEEL RULE PROPERTIES

POINTAGE: Width or thickness of rule. Each point is .014 inch. Typically rotary is 4 PT and Corrugated Flat bed 3 PT. Laser crease has unlike pointage .

BEVEL: Available in serrated or non serrated. Uses are for safety edges reducing paper cuts during handling package or for cosmetic purposes.

PROFILE: The cutting edge contour. Many choices. Regarding serrated, profile choice influences pressure, penetration, product edge appearance and rule fabrication limits.

STEEL RULE PROPERTIES

• HARDNESS:
  Body hardness→ More Carbon content Limits tight bending, Beam strength.
  Edge hardness→ Hardened teeth. Stands up to mallet. Maintains sharp points.
   

• BACK NOTCHING: Relieved to curve and contour across cylinder.
  No notch curved : Resists rule cracking
   

• DIAMETER: Match to cylinder. Watch smaller diameter folder glue machines.
   

• HEIGHT: Realize maximum opening on machine between lower and upper cylinders. Consider anvil cover.

STEEL RULE SUMMARY

HOW TO ORDER:

• Type: Cutting, Creasing , Perforate, Zipper, Wave, Surface

• Pointage: 3 PT , 4 PT , Remember on Laser Crease (8 on 4)

• Height: To tip of rule , not gullet

• Bevel: Center, Side, Long

• Profile: Tooth spacing, tooth design

• Diameter : Be careful using terms 50 x 90 , 38 x 90

• Back notching : Shallow , double , standard

• Hardness: Edge or Body