Patents by Inventor Andreas Limper
Andreas Limper 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).
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Patent number: 11801483Abstract: An internal mixer includes a mixing chamber enclosed by a housing, a feeding neck in which a ram is guided, a closable discharge door, and an intermeshing rotor system, composed of a pair of rotors that can each be rotated about a rotor longitudinal axis, each rotor comprising a rotor main body on which at least one respective rotor blade is arranged, and the rotor blades of the two rotors meshing with one another, is to be refined in such a way that an improved, that is, faster, pull-in behavior is achieved, while optimizing the dispersion and distribution of the introduced materials. To this end, it is provided that in the case of at least one of the rotors, the rotor main body, at least in sub-regions, is non-cylindrical and has a non-circular cross-section, in the surface sections in which no rotor blades are arranged on the rotor main body.Type: GrantFiled: November 29, 2018Date of Patent: October 31, 2023Assignee: Harburg-Freudenberger Maschinebau GmbHInventors: Steffen Alfes, Petra Noelling, Maik Rinker, Harald Keuter, Markus Hesse, Andreas Limper
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Publication number: 20210146321Abstract: An internal mixer includes a mixing chamber enclosed by a housing, a feeding neck in which a ram is guided, a closable discharge door, and an intermeshing rotor system, composed of a pair of rotors that can each be rotated about a rotor longitudinal axis, each rotor comprising a rotor main body on which at least one respective rotor blade is arranged, and the rotor blades of the two rotors meshing with one another, is to be refined in such a way that an improved, that is, faster, pull-in behavior is achieved, while optimizing the dispersion and distribution of the introduced materials. To this end, it is provided that in the case of at least one of the rotors, the rotor main body, at least in sub-regions, is non-cylindrical and has a non-circular cross-section, in the surface sections in which no rotor blades are arranged on the rotor main body.Type: ApplicationFiled: November 29, 2018Publication date: May 20, 2021Inventors: Steffen Alfes, Petra Noelling, Maik Rinker, Harald Keuter, Markus Hesse, Andreas Limper
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Patent number: 7556420Abstract: An internal mixer for kneading plastic materials, particularly synthetic materials, caoutchouc or rubber mixtures includes a housing with a mixing chamber, two rotors which are driveable in opposite directions and are arranged in the mixing chamber with parallel axes. The rotors have non-meshing rotor bodies, wherein each rotor body has four helically mixing wings which at one end thereof define a front passage to the corresponding front wall of the housing. Each rotor body has for helically extending mixing wings which are successively oppositely arranged on the circumference, wherein the mixing wings extend at least over half the axial length of the mixing chamber, and wherein the mixing wings define at one end thereof a front passage to the corresponding front wall of the housing.Type: GrantFiled: October 19, 2005Date of Patent: July 7, 2009Assignee: Harburg-Freudenberger Maschinenbau GmbHInventors: Andreas Limper, Harald Keuter, Maik Rinker, Dieter Berkemeier
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Publication number: 20060098527Abstract: An internal mixer for kneading plastic materials, particularly synthetic materials, caoutchouc or rubber mixtures includes a housing with a mixing chamber, two rotors which are driveable in opposite directions and are arranged in the mixing chamber with parallel axes. The rotors have non-meshing rotor bodies, wherein each rotor body has four helically mixing wings which at one end thereof define a front passage to the corresponding front wall of the housing. Each rotor body has for helically extending mixing wings which are successively oppositely arranged on the circumference, wherein the mixing wings extend at least over half the axial length of the mixing chamber, and wherein the mixing wings define at one end thereof a front passage to the corresponding front wall of the housing.Type: ApplicationFiled: October 19, 2005Publication date: May 11, 2006Inventors: Andreas Limper, Harald Keuter, Maik Rinker, Dieter Berkemeier
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Patent number: 6838025Abstract: The invention relates to a method for adjusting an extrusion die in an extruder by recording at least one master flow curve (40, 41) in a first extruder to which the extrusion die is optimized, in which curve the volume flow is entered over the pressure, which master flow curve (40, 41) is obtained in a measuring channel (20) which branches off in the extruder, the extrusion die or in any interposed adapter part from the flow channel (4), and the repeated recording of flow curves (30, 31) in the same or similar measuring channels (20) as in the first extruder after the assembly of the extrusion tool in the extruder to be checked and adjusted, and the purposeful change of process parameters for such a time until the flow curves (30, 31) correspond to the master flow curves (40, 41) within predetermined tolerance ranges.Type: GrantFiled: May 8, 2002Date of Patent: January 4, 2005Assignee: Technoplast Kunststofftechnik GmbHInventors: Frank Dorninger, Gordon Fattmann, Oliver Krüll, Andreas Limper, Meinhard Schwaiger, Stefan Seibel
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Patent number: 6802644Abstract: In an internal mixer, the bearing housings of the bearing arrangements for the journals of the rotors are mounted directly on the end walls of the housing. The gaps which are formed between the rotor and the end wall and between the journal and the end wall are connected to the outside by way of outlets. These outlets bridge the bearing which is encapsulated in the bearing housing.Type: GrantFiled: December 18, 2002Date of Patent: October 12, 2004Assignee: ThyssenKrupp Elastomertechnik GmbHInventors: Walter Häder, Andreas Limper
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Publication number: 20030112699Abstract: In an internal mixer, the bearing housings of the bearing arrangements for the journals of the rotors are mounted directly on the end walls of the housing. The gaps which are formed between the rotor and the end wall and between the journal and the end wall are connected to the outside by way of outlets. These outlets bridge the bearing which is encapsulated in the bearing housing.Type: ApplicationFiled: December 18, 2002Publication date: June 19, 2003Applicant: ThyssenKrup Elastomertechnik GmbHInventors: Walter Hader, Andreas Limper
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Publication number: 20020185765Abstract: The invention relates to a method for adjusting an extrusion die in an extruder by recording at least one master flow curve (40, 41) in a first extruder to which the extrusion die is optimized, in which curve the volume flow is entered over the pressure, which master flow curve (40, 41) is obtained in a measuring channel (20) which branches off in the extruder, the extrusion die or in any interposed adapter part from the flow channel (4), and the repeated recording of flow curves (30, 31) in the same or similar measuring channels (20) as in the first extruder after the assembly of the extrusion tool in the extruder to be checked and adjusted, and the purposeful change of process parameters for such a time until the flow curves (30, 31) correspond to the master flow curves (40, 41) within predetermined tolerance ranges.Type: ApplicationFiled: May 8, 2002Publication date: December 12, 2002Inventors: Frank Dorninger, Gordon Fattmann, Oliver Krull, Andreas Limper, Meinhard Schwaiger, Stefan Seibel
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Patent number: 5297865Abstract: A plastics processing machine is associated with an internal mixer. Thermoplastic material is separately melted in the plastics processing machine and injected into the mixing chamber of the internal mixer, where it is mixed with fillers, caoutchouc or the like.Type: GrantFiled: August 22, 1991Date of Patent: March 29, 1994Assignee: Werner & Pfleiderer Gummitechnik GmbHInventors: Wolfgang Engel, Andreas Limper, Walter Hader
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Patent number: 5245861Abstract: For the measurement of the visco-elastic properties of a polymer material (69), such as plastics or rubber, a measuring wedge (47) is pressed into a rolled sheet (25) located on a work roll (5) of a mixing mill and conclusions are drawn from the applying forces and from the penetration depth of the measuring wedge onto the visco-elastic properties of the material (69).Type: GrantFiled: October 7, 1991Date of Patent: September 21, 1993Assignee: Werner & Pfleiderer Gummitechnik GmbHInventors: Andreas Limper, Walter Hader
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Patent number: 5152609Abstract: In a method for measuring the temperature of the mix in a mixing chamber of a kneader, the temperature of the mix being continuously measured by means of at least one sensor projecting into the mixing chamber, for the purpose of correcting measuring errors due to the heat conductivity of the sensor housing, a second sensor, in particular in the form of an infra-red sensor, is provided and directly detects the temperature of the mix at certain discrete times during the mixing process, the continuous temperature measuring of the first sensor being corrected according to the measuring of the second sensor when the mixing process is continued.Type: GrantFiled: July 18, 1991Date of Patent: October 6, 1992Assignee: Werner & Pfleiderer Gummitechnik GmbHInventors: Walter Hader, Andreas Limper, Wolfgang Engel
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Patent number: 5080264Abstract: Apparatus for feeding bulk material, such as, for example, chips, shavings, or the like, into a spiral pump or press, comprises a supply funnel, a feed line, and a rotatably driven conveying and compacting means. The latter comprises a vertically oriented axial shaft which comprises a helicoid portion within the vicinity of the supply funnel, and a helical thread portion within the vicinity of the feed line. The helicoid portion is spaced from the inner peripheral surface of the supply funnel by means of a predetermined spacing, and the inner peripheral surface of the supply funnel is provided with a plurality of pins equiangularly disposed about the inner periphery or circumferential extent of the supply funnel. The pins are arranged within a horizontal plane, and may be disposed within multiple horizontal planes.Type: GrantFiled: February 22, 1990Date of Patent: January 14, 1992Assignee: Signode CorporationInventor: Andreas Limper