# US 2014/0151473 A1 · Pulper with a shaft and method for processing composite materials > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0151473 A1 - Document ID: US20140151473A1 - Status: Published application - Kind: A1 - Application number: 14/234,684 - Filed: 2012-07-18 - Published: 2014-06-05 - Earliest claimed: 2011-07-26 - Inventors: Hans-Joachim Boltersdorf - Web page: https://patentgrep.com/patent/US20140151473A1 ## CPC - D21B 1/345: {Pulpers} - B02C 23/36: the crushing or disintegrating zone being submerged in liquid - D21B 1/322: {coated with synthetic materials} - D21B 1/325: {de-inking devices} - D21B 1/347: {Rotor assemblies} - Y02W 30/64: Paper recycling - D21B: FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT - B02C: CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN ({household tools and machines for pulverising foodstuffs, e.g. coffee and spice mills A47J42/00; pharmaceutical mortars A61J3/02; mechanical processing of refuse and garbage B03B9/06; dressing mould materials by grinding B22C5/04}; obtaining metallic powder by crushing, grinding or milling B22F9/04; {recovery of plastics by disintegrating B29B17/00; crushing raw materials in starch making C08B30/02; beaters for papermaking D21D1/02; crushing devices specially for transport in mines E21F13/002; slag crushing devices F23J1/00; fuel milling devices in combustion apparatus F23K1/00; household devices for crushing coal F24B15/02; ice disintegrating devices F25C5/02}) - Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT ## Abstract A pulper with a shaft on which a spiral is arranged has been improved to such an extent that it comprises a shaft with a counter-rotating spiral. Preferably both spirals are arranged on the same shaft. This results in extreme friction in the centre of the reaction space of the pulper and thus in an increase in the capacity of the pulper and in an improvement to achieve highly efficient suspension. ## Claims ### Claim 1 A pulper with a shaft on which a spiral is arranged, wherein it comprises a further shaft with a counter-rotating spiral, or the spiral and a counter-rotating spiral are arranged on the same shaft, wherein in each case the spirals are encompassed by a screen basket. ### Claim 2 (depends on 1) The pulper according to claim 1, wherein it comprises a feed screw in the upper region of the pulper. ### Claim 3 (depends on 1) The pulper according to claim 1, wherein radially outside the region between the spiral and the counter-rotating spiral it comprises a slotted basket. ### Claim 4 (depends on 1) The pulper according to claim 1, wherein it comprises a basket of a pressure screening system. ### Claim 5 (depends on 1) The pulper according to claim 1, wherein it comprises a basket that is arranged with different apertures around the spirals. ### Claim 6 (depends on 1) The pulper according to claim 1, wherein it comprises a cylindrical basket. ### Claim 7 (depends on 1) The pulper according to claim 1, wherein it comprises several units arranged one behind the other, with each unit comprising at least one spiral and a screen basket. ### Claim 8 (depends on 7) The pulper according to claim 7, wherein the units are interconnected by means of a passage with a feed screw. ### Claim 9 (depends on 8) The pulper according to claim 8, wherein in the region of the passage an intake is arranged. ### Claim 10 (depends on 1) The pulper according to claim 1, wherein units arranged one behind the other comprise different baskets. ### Claim 11 (depends on 1) The pulper according to claim 1, wherein the units arranged one behind the other comprise baskets with cylindrical hole regions, wherein the axial length of the baskets varies. ### Claim 12 (depends on 1) The pulper according to claim 1, wherein the units arranged one behind the other comprise baskets with cylindrical hole regions, wherein the radius of the baskets varies. ### Claim 13 (depends on 1) The pulper according to claim 1, wherein it comprises a basket with grinding media. ### Claim 14 (depends on 1) The pulper according to claim 1, wherein it comprises a basket with sand as a grinding medium. ### Claim 15 (depends on 1) The use of a pulper according claim 1 for processing composite materials, in which use the composite materials are placed in the pulper with grinding media, and wherein location rejects are separated from fibrous materials. ### Claim 16 (depends on 15) The use according to claim 15, wherein sand is used as a grinding medium. ### Claim 17 (depends on 15) The use according to claim 15, wherein after the fibrous materials have been separated the rejects are separated into a plastic-containing fraction and a metal-containing fraction. ### Claim 18 (depends on 15) The use according to claim 15, wherein after the fibrous materials and the plastic-containing fraction have been separated the grinding medium is separated from the metal-containing fraction.