Patents by Inventor Roland Kunkel

Roland Kunkel has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240301623
    Abstract: A method for producing a transfer mixture by the direct dissolution method in a thin film evaporator (D) having a feed, a housing and a discharge, wherein the feed introduces a product consisting essentially of cellulose, water and a functional liquid into the housing, wherein an evaporator shaft (5) situated in the housing (4) rotationally wipes the product over the heated interior of the housing (4), wherein the product heats up and some of the water evaporates, so that the transfer mixture is obtained, wherein (a) the transfer mixture is discharged before the product substantially overheats; and (b) all heating surfaces of the thin film evaporator in contact with the product are subjected to a heating temperature, which is at least 20K above the temperature of the product.
    Type: Application
    Filed: January 12, 2022
    Publication date: September 12, 2024
    Applicant: List Technology AG
    Inventors: Manuel Steiner, Roland Kunkel, Daniel Witte, Judith Andrea Michelle Günther
  • Publication number: 20240075403
    Abstract: The invention relates to a thin film evaporator (D) for producing a transfer mixture according to the direct dissolution method, having a feed (1), a housing (4) and an outlet (2), wherein the feed (1) introduces a starting material, made of cellulose, water and a functional fluid, into the housing (4), wherein an evaporator shaft (5) situated in the housing (4) rotatingly sweeps the starting material over the heated interior of the housing (4), wherein the product is heated and some of the water evaporates so as to result in the transfer mixture, which flows to the outlet (2) together with a supply stream, wherein the through-flow capacity of the outlet (2) is greater than the supply stream.
    Type: Application
    Filed: January 12, 2022
    Publication date: March 7, 2024
    Applicant: List Technology AG
    Inventors: Manuel Steiner, Roland Kunkel, Daniel Witte, Judith Andrea Michelle Günther
  • Publication number: 20240076832
    Abstract: Mixing kneader for processing a transfer mixture into a molding solution, according to the direct dissolution method, having a feed, a housing and a discharge, wherein the feed introduces a product consisting essentially of cellulose, water and a functional liquid into the housing, wherein a kneader shaft situated in the housing rotationally mixes and kneads the product and sweeps wipes it over heated inner surfaces of the mixing kneader, wherein reducing the amount of undissolved particles in the product and the size of the particles are reduced, and evaporating some of the water evaporates to produce form a molding solution, wherein the process volume of the mixing kneader is determined only by the requirements of a molding solution flow capacity.
    Type: Application
    Filed: January 12, 2022
    Publication date: March 7, 2024
    Applicant: List Technology AG
    Inventors: Manuel Steiner, Roland Kunkel, Daniel Witte, Judith Andrea Michelle Günther
  • Publication number: 20220316095
    Abstract: The invention discloses a preparation method and a production device for producing a recycled fiber spinning solution with using a solvent, which comprises two or more vertical wiped film evaporators (3, 4, . . . ) connected with a single horizontal cylindrical kneading reactor. The aqueous mixture of cellulose and solvent and auxiliary agent is prepared into a spinnable cellulose spinning dope, which is characterized by injecting the material mixture into two or more vertical wiped film evaporators and a horizontal cylindrical kneading reactor, each unit is preferably equipped with a separate condensing system, and the vacuum system can be separately configured to share a vacuum system.
    Type: Application
    Filed: June 15, 2020
    Publication date: October 6, 2022
    Applicant: List Technology AG
    Inventors: Roland Kunkel, Daniel Witte, Sven König, Manuel Steiner, Weilie Wang
  • Publication number: 20180043577
    Abstract: A device for carrying out mechanical, chemical, and/or thermal processes in a housing (3), comprising mixing and cleaning elements (5) on at least two shafts (1, 2), the mixing and cleaning elements (5) on the shafts (1, 2) meshing with each other and being equipped with disk elements that include kneading bars. The number of disk elements including kneading bars is adjusted to the speed ratio between the shafts.
    Type: Application
    Filed: October 24, 2017
    Publication date: February 15, 2018
    Applicant: LIST HOLDING AG
    Inventors: Pierre-Alain Fleury, Roland Kunkel
  • Publication number: 20150273731
    Abstract: A method for implementing mechanical, chemical and/or thermal processes in a product which is located in a housing (1) with mixing and cleaning elements and/or transporting elements (6) on at least one shaft (4, 5), and is transported via the elements (6) from an inlet (2) to an output (10), the intention is for a cross section of the housing (1) to be adjusted in variable fashion at least in the longitudinal direction thereof.
    Type: Application
    Filed: September 26, 2013
    Publication date: October 1, 2015
    Applicant: LIST HOLDING AG
    Inventors: Pierre-Alain Fleury, Daniel Witte, Roland Kunkel, Alfred Kunz, Pierre Liechti
  • Publication number: 20140376327
    Abstract: A device for carrying out mechanical, chemical, and/or thermal processes in a housing (3), comprising mixing and cleaning elements (5) on at least two shafts (1, 2), the mixing and cleaning elements (5) on the shafts (1, 2) meshing with each other and being equipped with disk elements that include kneading bars. The number of disk elements including kneading bars is adjusted to the speed ratio between the shafts.
    Type: Application
    Filed: December 27, 2012
    Publication date: December 25, 2014
    Inventors: Pierre-Alain Fleury, Roland Kunkel
  • Publication number: 20130116399
    Abstract: A method for carrying out polymerization processes, includes a first step involving polymerization or co-polymerization of a monomer or monomers, and a second step involving a separation step. In an embodiment, before the separation step, during the separation step, or both before and during the separation step, one or more substance is added to the reaction mixture that induces stripping, influencing of the temperature, or both stripping and influencing of the temperature such that the reaction equilibrium is shifted to the polymers and the rate of reaction to the monomer is slowed. In embodiments, before and/or in the second step, a substance is added to the reaction mixture so that a stop is achieved, and as a further function stripping and/or influencing of temperature occurs.
    Type: Application
    Filed: May 12, 2011
    Publication date: May 9, 2013
    Applicant: List Holding AG
    Inventors: Andreas Diener, Roland Kunkel, Pierre-Alain Fleury, Bernhard Stützle
  • Patent number: 5943868
    Abstract: The invention relates to an absorption refrigerating machine and a process for the operation thereof. It can be used as a household cooling appliance, for example as the last link in the cold chain, or for the cooling of medicine or as a refrigerating set of an air-conditioning system, and use in a stand-alone variant without an electrical energy connection is possible. The absorption refrigerating machine has a condenser, an evaporator and an absorber, and a refrigerant-absorbent mixture can be circulated through all three. There is also at least one solar collector for heating to above the refrigerant boiling point and a refrigerant storage unit connected to the condenser. High-pressurized liquid refrigerant is held in the refrigerant storage unit, and an absorbent storage unit and a desorbent storage unit are connected to the absorber.
    Type: Grant
    Filed: May 6, 1998
    Date of Patent: August 31, 1999
    Assignee: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V,
    Inventors: Bernhard Dietz, Roland Kunkel, Peter Noeres