[KNOL, Harm, Gerrit, KRUITHOF, Cornelis, Johannes, VAN RIJN, Cornelis, Johannes, Maria, NIJDAM, Wietze] 22, K. van Gelreweg, 6961 LB Eerbeek, NL

[KNOL, Harm, Gerrit, KRUITHOF, Cornelis, Johannes, VAN RIJN, Cornelis, Johannes, Maria, NIJDAM, Wietze] Karel van Gelreweg 22 NL-6961 LB Eerbeek;Gerard Doustraat 10 NL-1072 VP Amsterdam;Oosterveldweg 9 NL-7274 DZ Geesteren;Schouwberg 16 NL-5508 JB Veldhoven;Beatrixlaan 2 NL-7255 DB Hengelo;Maanstraat 41 NL-7521 GS Enschede In an electroforming method for making metal products (10) having a pattern of openings (9) separated by dykes (8) using a mandrel in an electroplating bath, metal from the bath is deposited on at least two electrically mutually insulated regions. Said regions comprise at least one main pattern (3) for product dykes (8) to be formed, which main pattern (3) is electrically insulated from at least one ancillary pattern (5) for a reinforcement (7) to be formed. In the method according to the invention, first the ancillary pattern (5) is connected to a current source in order to form reinforcement (7) thereon and in order to effect an electrical connection between the ancillary pattern (5) and the main pattern (3) by means of the growing metal. During the continuation of the method, reinforcement (7) is thickened and the product dykes (8) are formed. A strong product having different thicknesses is therefore obtained in one step. A mandrel suitable for use in the method is also described.

[Wolfram Kolbe, Frank Schaum, Harrie G. Knol] DE Heidelberg A surface, especially a galvanically molded transport cylinder sleeve, has a surface structure for contacting printing material, in particular sheets of paper. The surface structure includes first structural elevations spaced apart from each other by a minimum distance A1 and having a height B1 and second structural elevations spaced apart from each other by a minimum distance A2 and having a height B2 with B21. A ratio between the distances A1 and A2 ranges between 10:1 and 1:1. The surface has support areas for supporting the printing material. The printing material is prevented from contacting a planar horizontal surface between the support areas of first, higher structural elevations due to second, lower structural elevations with support areas thereof that are formed between the first, higher structural elevations. A machine for processing printing material and a method for producing areas with a surface structure, are also provided.

[Knol, Harm Gerrit] 22, K. van Gelreweg, 6961 LB Eerbeek, NL

[de Hek, Johan Adriaan] 22, K. van Gelreweg, NL-6961 LB Eerbeek, NL

[Knol, Harm Gerrit] 22, K. van Gelreweg, 6961 LB Eerbeek, NL The invention provides a substantially flat sieve material (50) of metal with sieve apertures (52), in particular sieve apertures with microdimensions. The sieve apertures (52) comprise at least one passage (56) in the plane of the sieve material parallel to a main surface (58), while the inlet and outlet (54; 60) can open onto the same main surface or a different main surface. The invention furthermore provides a method for the production of such sieve material by means of electroforming techniques in which a sacrificial material is used. ＜img id="iaf01" file="imgaf001.tif" wi="127" he="60" img-content="drawing" img-format="tif" /＞

[KNOL, Harm, Gerrit] 22, Karel van Gelreweg NL-6961 LB Eerbeek;9, Oosterveldweg NL-7274 DZ Geesteren According to a first aspect, the invention relates to a method for producing a tool (20) which is used as a cathode in the electrochemical machining (ECM) of a workpiece (70) made from metal or a metal alloy to produce a product, which method comprises electroforming a negative (20) of one or more surfaces of the product. A second aspect relates to the use of a tool produced by the method according to the invention as cathode in the electrochemical machining (ECM) of a workpiece (70).

[KORSSE, Johannes] 22, K. van Gelreweg, 6961 LB Eerbeek, NL

[BAKKER, Remmelt] Karel van Gelreweg 22 NL-6961 LB Eerbeek;Bergstraat 30 NL-7417 TW Deventer Filter pack intended for the filtration of a liquid polymer, in particular prior to fibres being spun from said melt, which comprises a filter disc made of a metal perforated plate (1), which plate (1) comprises essentially conical sieve holes (3) having a hole dimension between 1 and 100 νm and more than 100 holes (3) per linear cm, while the thickness of the perforated plate (1) is at least 50 νm, the perforated plate (1) during filtration of a liquid polymer being oriented in such a way that the hole dimension increases in the flow direction of the liquid polymer. Moreover, a spinning head for spinning polymer fibres is described which comprises such a filter pack.

[Harm Gerrit Knol, Ahmad Dawud Harbiye] NL Eerbeek A dispersion plate for dispersing a fluid includes two surface sides, a peripheral side and at least one through-opening which extends between the two surface sides, the opening including an inlet on one surface side, a passage, and an outlet on the other surface side, and the inlet, the passage and the outlet being delimited by an opening wall of the dispersion plate. The inlet, the passage and the outlet have a common longitudinal axis, the part of the opening wall delimiting the passage being substantially parallel to the common longitudinal axis, and the part of the opening wall delimiting the outlet, from the passage to the surface side where the outlet is located, being divergent relative to the common longitudinal axis. A method for producing a dispersion plate by electroplating is also described.