GLOSSARY

GLOSSARY

The following is a list of terms used in the industry.

Perforated Screen

Also called punching screen （punching metal）. Mainly refers to metal sheets punched by a press with holes arranged at regular intervals.

Mesh（ □”）

Unit used to refer to the number of holes per square inch,
calculated as follows.

1 inch = 25.4mm
　1 sq. inch = 645.16mm²

645.16 ÷ Hole center ÷ Hole interval = （ ）mesh（□”）

"Mesh" is also used to refer to the mesh of woven wire.
In this case, it is used to refer to the number of apertures within an inch.

60°Staggered
　Hole interval = Hole center x 0.866

30°Staggered
　Hole interval = Hole center x 0.29

45°Staggered
　Hole interval = Hole center x 0.5

Open Area

Ratio of open area within the sheet area,
calculated as follows.

Area of 1 hole

Hole center x Hole interval

×100＝（　　　）％

Hole Pattern

Indicates the pattern of the holes punched. The following illustration shows the main patterns used.

Hole patterns

用語集

Perforated Patterns

  • Pattern 1A

    60°Staggered（Finished）

  • Pattern 1B

    60°Staggered（1 row unfinished）

  • Pattern 1C

    60°Staggered（2 row unfinished）

  • Pattern 3

    30°Staggered（4 rows）

  • Pattern 4

    30°Staggered（4 rows）

  • Pattern 5

    30°Staggered（4 rows）