Screen material manufacturing method and applications thereof
AssigneeStork Prints B.V.
InventorsHenricus Hermanus Thuis, Cornelis Jeckmans
Life of this patent
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Abstract
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.
Claims29
Metal screen material having a flat side, comprising a network of dykes which are connected to one another by crossing points, which dykes delimit openings, the thickness of the crossing points not being equal to the thickness of the dykes only on the side of the screen material opposite to the flat side.
Method for manufacturing metal screen material having a flat side, comprising a network of dykes which are connected to one another by crossing points, which dykes delimit openings, in particular according to one of the preceding claims, comprising at least one or more growth steps for electrolytically thickening a flat screen skeleton in an electroplating bath under controlled conditions, in such a manner that in at least one growth step the growth rate of the crossing points is not equal to the growth rate of the dykes, so that in the screen material the thickness of the crossing points is not equal to the thickness of the dykes only on the side of the screen material opposite to the flat side.
Use of the screen material according to claims for the perforation of film material.
Method for manufacturing an assembly of a tubular support screen and a tubular perforating screen, in particular cylindrical seamless screens, at least comprising a step of shrinking the perforating screen onto the support screen.
Method for manufacturing an assembly of a tubular support screen and a tubular perforating screen, in particular cylindrical seamless screens, at least comprising a step of arranging a deformed support screen in the perforating screen and restoring the original shape of the support screen.
Method for manufacturing an assembly of a tubular support screen and a tubular perforating screen, in particular cylindrical seamless screens, at least comprising a step of pushing the perforating screen over the support screen with the aid of a pressurized fluid.
Dependencies are inferred from the claim text.