| 摘要 |
A metal screen material ( 32 ) having a flat side, in particular electroformed screen material, preferably seamless cylindrical screen material, comprises a network of dykes ( 34 ) which are connected to one another by crossing points ( 36 ), which dykes ( 34 ) delimit openings ( 30 ). The thickness of the crossing points ( 36 ) is not equal to the thickness of the dykes ( 34 ). The metal screen material ( 32 ) or a combination thereof with a perforating screen ( 17 ) can he used as a perforating stencil for the perforation of film material ( 2 ), for example made from plastic material.
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