Issued Patents All Time
Showing 26–37 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5694961 | Device and method for changing the flow resistance of a fluid flow control device | Helmut Heinzmann, Wolfgang Ruf | 1997-12-09 |
| 5688374 | Headbox and manifold system for producing a multi-ply paper web | Hans-Peter Sollinger | 1997-11-18 |
| 5639352 | Headbox lamellae and method for reducing turbulence thereabout | Wolfgang Ruf, Helmut Heinzmann | 1997-06-17 |
| 5639349 | Method and device for quality improvement in multilayer and multiply papers | Hans-Peter Sollinger, Udo Grossmann, Dieter Egelhof | 1997-06-17 |
| 5622603 | Influencing the jet velocity in the multilayer headbox | Albrecht Meinecke, Dieter Egelhof, Wolfgang Ruf, Helmut Heinzmann, Hans-Peter Arledter | 1997-04-22 |
| 5573642 | Method and device for evening out the basic weight cross section by sectioning the screen circuit | — | 1996-11-12 |
| 5565063 | Device and method for choking a stock suspension flow in a paper machine | Helmut Heinzmann | 1996-10-15 |
| 5549792 | Headbox for a paper machine | Helmut Heinzmann, Wolfgang Ruf, Dieter Egelhof, Gernot Kinzler | 1996-08-27 |
| 5527433 | Device and method for choking a stock suspension flow in a paper machine | Helmut Heinzmann | 1996-06-18 |
| 5466340 | Paper machine headbox and method of controlling pulp material parameters | Helmut Heinzmann, Wolfgang Ruf | 1995-11-14 |
| 5401363 | Method of homogenizing the constitution of a web of paper | Helmut Heinzmann, Wolfgang Ruf | 1995-03-28 |
| 5316383 | Mixing system for mixing two liquids at constant mixture volume flow for supplying the headbox of a paper machine | Thoroe Scherb | 1994-05-31 |