1
Stefan Zikeli, Bernd Wolschner, Dieter Eichinger, Raimund Jurkovic, Heinrich Firgo: Process and arrangement for preparing a solution of cellulose. Lenzing Aktiengesellschaft, Brumbaugh Graves Donohue & Raymond, March 10, 1992: US05094690 (38 worldwide citation)

There is disclosed a process for preparing solutions of cellulose in aqueous tertiary amine oxides from a suspension of cellulose in an aqueous solution of the tertiary amine oxide by supplying heat at a reduced pressure. The suspension is transported over a heating surface, spread in layers or coat ...


2
Raimund Jurkovic, Heinrich Firgo, Dieter Eichinger, Stefan Zikeli: Method of producing shaped cellulosic articles. Lenzing Aktiengesellschaft, Herbert Dubno, October 12, 1993: US05252284 (38 worldwide citation)

A cellulosic solution in a amine oxide and water is forced through an elongated orifice passage having a minimum length of 1000 /.mu.m and a minimum diameter along the length which is up to 150 /.mu.m so that fiber characteristics are imparted to the emerging strand which passes through an air gap o ...


3
Stefan Zikeli, Ernst Rauch, Hermann Koberger, Friedrich Ecker, Hartmut Ruf, Raimund Jurkovic, Franz Schwenninger: Process of and apparatus for making cellulose mouldings. Lenzing Aktiengesellschaft, Brumbaugh Graves Donohue & Raymond, December 31, 1996: US05589125 (27 worldwide citation)

To prepare cellulose mouldings, a solution of cellulose in a tertiary amine-oxide is moulded in a hot state and the moulded solution is introduced into a precipitation bath in order to precipitate the contained cellulose, wherein the hot moulded solution is cooled before introduction into the precip ...


4
Wolfgang Wizani, Andreas Krotscheck, Johann Schuster, Karl Lackner: Process for the production of viscose pulp. Voest Alpine Industrieanlagenbau, Lenzing Aktiengesellschaft, Oblon Spivak McClelland Maier & Neustadt P C, October 14, 1997: US05676795 (27 worldwide citation)

The present invention relates to a process for producing viscose pulp from lignocelluloses, such as hardwood, softwood or annual plants, in which process the lignocellulose is treated in a digester at first with saturated steam to prehydrolyze hemicelluloses and subsequently, without flashing, with ...


5
Franz Sasshofer, Reinhard Reinmuller, Christian H F Schlossnikl, Adalbert G Wimmer: Monoaxially stretched shaped article of polytetrafluoroethylene and process for producing the same. Lenzing Aktiengesellschaft, Brumbaugh Graves Donohue & Raymond, December 1, 1992: US05167890 (26 worldwide citation)

To produce a monoaxially stretched shaped article of polytetrafluoroethylene (PTFE), a pasty mass containing PTFE powder is continuously shaped to a shaped body, which is fed over a plurality of rollers or rolls, heated and stretched. The shaped body is heated to a temperature of between 327.degree. ...


6
Stefan Zikeli, Friedrich Ecker, Ernst Rauch, Klaus Renner, Anton Sch onberg: Process for the preparation of cellulose sheet. Lenzing Aktiengesellschaft, Brumbaugh Graves Donohue & Raymond, March 4, 1997: US05607639 (22 worldwide citation)

Method for the preparation of cellulose sheet by extrusion of a heated solution of cellulose in a tertiary amine-oxide, which method includes using an extrusion die with an extrusion orifice, characterised in that, immediately below the extrusion orifice there is provided an inlet for cooling gas to ...


7
Franz Sasshofer, Friedrich Gotschy, Johannes Krassig, Adalbert Wimmer: Method of producing threads or fibers of synthetic materials. Chemigfaser Lenzing Aktiengesellschaft, Brumbaugh Graves Donohue & Raymond, May 24, 1977: US04025598 (22 worldwide citation)

A method of producing threads and fibers of synthetic materials uses a cylindrically-shaped body of the synthetic material which is allowed to rotate against a scratching tool and a peeling knife arranged to follow the scratching tool in the direction of rotation. The peeled-off curtain of parallel ...


8
Walter Klein: Filtering apparatus for separating solid and suspended matter from a liquid. Lenzing Aktiengesellschaft, Brumbaugh Graves Donohue & Raymond, November 17, 1992: US05164079 (22 worldwide citation)

A filtering apparatus for separating solid and suspended matter from liquids which includes a cylindrical housing, a cylindrical filter basket coaxially installed therein and delimiting a space I (FIG. 1) receiving the liquid to be filtered relative to an external annular space II receiving the filt ...


9
Stefan Zikeli, Bernd Wolschner, Dieter Eichinger, Raimund Jurkovic, Heinrich Firgo: Process and arrangement for preparing a solution of cellulose. Lenzing Aktiengesellschaft, Brumbaugh Graves Donohue & Raymond, July 19, 1994: US05330567 (21 worldwide citation)

There is disclosed a process for preparing solutions of cellulose in aqueous tertiary amine oxides from a suspension of cellulose in an aqueous solution of the tertiary amine oxide by supplying heat at a reduced pressure. The suspension is transported over a heating surface, spread in layers or coat ...


10
Wolfram Kalt, Johann Manner, Heinrich Firgo: Moulding materials and spinning materials containing cellulose. Lenzing Aktiengesellschaft, Brumbaugh Graves Donohue & Raymond, October 21, 1997: US05679146 (21 worldwide citation)

Moulding material and spinning material respectively containing cellulose, an aqueous tertiary amine-oxide, a non-solvent and a stabiliser, characterised in that, one or more stabilisers are provided which altogether have a basic and antioxidant action with the proviso that the basic stabiliser is n ...