| US 7,568,643 B2 | ||
| Process and apparatus for defined comminution of polymer gels | ||
| Gerhard Schoppel, Steinhaus b. Wels (Austria); Georg Haeubl, Linz (Austria); Marion Wagner, Katsdorf (Austria); Helmuth Kirsch, Wels (Austria); Erich Schulz, Ansfelden (Austria); and Gerald Summer, Linz (Austria) | ||
| Assigned to DSM Fine Chemicals Austria Nfg GmbH & Co. KG, Linz (Austria) | ||
| Filed on May 28, 2008, as Appl. No. 12/153,991. | ||
| Application 12/153991 is a continuation of application No. 10/270583, filed on Oct. 16, 2002. | ||
| Claims priority of application No. A 1630/2001 (AT), filed on Oct. 16, 2001. | ||
| Prior Publication US 2008/0230642 A1, Sep. 25, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. B02C 17/00 (2006.01) | ||
| U.S. Cl. 241—84 [241/95] | 1 Claim |
| 1. An apparatus for comminution of polymer gel, said apparatus comprising:
a static cutting unit including a cutting screen for obtaining gel strands, wherein the cutting screen is formed of pretensioned
members, and the static cutting unit includes a stiffening grid for supporting the cutting screen;
a dynamic cutting element, positioned downstream of the static cutting unit, for cutting the gel strands formed by the static
cutting unit into particles of uniform size and shape; and
a feed unit for feeding the polymer gel to the static cutting unit in a shape-stable state, wherein the feed unit is operable
to feed the polymer gel batchwise or continuously,
wherein the feeding unit comprises a tubular container and a plunger positioned in the container, and the dynamic cutting
element comprises a plurality of wires supported by a guide structure that is movable in a direction that is transverse relative
to the feed direction of the container.
|