Patents by Inventor Chokri Cherif
Chokri Cherif 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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Publication number: 20230079829Abstract: The present invention provides a winding and twisting device for a ring spinning or ring twisting machine, comprising: a stator comprising a superconducting material, a stator cooling device, a rotor configured to generate a magnetic field, and a rotatable spindle, wherein the rotor and the stator are arranged co-axially to the spindle, and wherein the rotor has a ring/traveler system mounted thereon.Type: ApplicationFiled: February 18, 2021Publication date: March 16, 2023Inventors: Anwar ABDKADER, Mahmud HOSSAIN, Martin WALDMANN, Chokri CHERIF
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Patent number: 9572668Abstract: The invention relates to an implant and a set for producing an implant and their uses. Furthermore, the invention describes a method of making an implant as per the invention. An implant for producing bone implants with improved mechanical characteristics, especially with adjustable mechanical characteristics, is provided via the invention. The implant as per the invention made up of a fiber composite material contains resorbable mineral bone cement as the matrix material, to which reinforcing, long metal fibers and/or endless metallic fibers with an aspect ratio of at least 100:1 are added in the form of at least one fiber structure that provides a framework and that preforms the contour of the implant.Type: GrantFiled: April 11, 2013Date of Patent: February 21, 2017Assignee: Innotere GmbHInventors: Berthold Nies, Sophie Rössler, Sandra Storch, Chokri Cherif, Ezzeddine Laourine
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Patent number: 9562306Abstract: A fabric structure (1) having a cellular construction. The fabric structure comprises at least one base layer (6) consisting of warp threads (10), at least one top layer (7) consisting of warp threads (11) and weft threads (2) placed in between, wherein the fabric structure (1) is formed by a multiplicity of three-dimensional cells (3, 9) and the height (8) of each individual cell (3, 9) is defined by the spacing (8) between two warp threads (10, 11), located above the other in height direction z, in adjacent layers (6, 7), the length (12) of the cell (3, 9) is defined by the spacing (12) between two warp threads (10) or (11) adjacent in the weft direction x, in one layer (6, 7) and the width (13, 14) of a cell (3, 9) is defined by the extent (13) of the weft thread course in the warp direction y and/or the spacing (14) between the two weft threads (2) that are opposite in the warp direction y and adjacent to the particular cell (9).Type: GrantFiled: February 6, 2014Date of Patent: February 7, 2017Assignee: TECHNISCHE UNIVERSITÄT DRESDENInventors: Cornelia Sennewald, Gerald Hoffmann, Chokri Cherif
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Publication number: 20150368835Abstract: The invention relates to a fabric structure having a cellular construction including at least one base layer of warp threads, at least one top layer of warp threads and weft threads placed in between, and formed by a multiplicity of three-dimensional cells having a height, length and width dimension Each weft thread extends at least regionally in the fabric structure in a dimensionally stable and three-dimensional manner and winds in the weft direction x about this axis an imaginary, three-dimensional elongate hollow body, extending through the cells, having any desired end face. The weft threads intersect the warp threads such that the weft threads and warp threads retain one another and the fabric structure is self-supporting.Type: ApplicationFiled: February 6, 2014Publication date: December 24, 2015Inventors: Cornelia SENNEWALD, Gerald HOFFMANN, Chokri CHERIF
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Publication number: 20150066144Abstract: The invention relates to an implant and a set for producing an implant and their uses. Furthermore, the invention describes a method of making an implant as per the invention. An implant for producing bone implants with improved mechanical characteristics, especially with adjustable mechanical characteristics, is provided via the invention. The implant as per the invention made up of a fiber composite material contains resorbable mineral bone cement as the matrix material, to which reinforcing, long metal fibers and/or endless metallic fibers with an aspect ratio of at least 100:1 are added in the form of at least one fiber structure that provides a framework and that preforms the contour of the implant.Type: ApplicationFiled: April 11, 2013Publication date: March 5, 2015Inventors: Berthold Nies, Sophie Rössler, Sandra Storch, Chokri Cherif, Ezzeddine Laourine
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Patent number: 8813467Abstract: A tire includes at least one structural element which includes at least one reinforcing element which includes at least one hybrid yarn, the at least one hybrid yarn including a plurality of filaments obtained from at least one first multifilament yarn having a first initial tangent modulus and at least one second multifilament yarn having a second initial tangent modulus, the first and the second initial tangent modulus being different from each other, each one of the first and the second multifilament yarn including a plurality of individual filaments, the individual filaments of each one of the first and the second multifilament yarns being at least partially intermixed with each other. The tire may be a high performance or ultra high performance tire, or a tire suitable for being employed in sporting contests such as track motor races, or a tire suitable for sports utility vehicles.Type: GrantFiled: October 19, 2012Date of Patent: August 26, 2014Assignee: Pirelli Tyre, S.p.A.Inventors: Barbara Rampana, Diego Tirelli, Udo Kuhlmann, Chokri Cherif, Christian Paul, Refah Ahmet Torun, Olaf Diestel
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Patent number: 8640753Abstract: A tire includes at least one structural element which includes at least one reinforcing element, which includes at least one hybrid yarn, the at least one hybrid yarn including a plurality of filaments obtained from at least one first multifilament yarn having a first initial tangent modulus and at least one second multifilament yarn having a second initial tangent modulus, the first and the second initial tangent modulus being different from each other, each one of the first and the second multifilament yarns including a plurality of individual filaments, the individual filaments of each one of the first and the second multifilament yarns being at least partially intermixed with each other. Preferably, the tire is a high performance or ultra high performance tire, or a tire suitable for being employed in sporting contests, such as, track motor races, or a tire suitable for sports utility vehicles.Type: GrantFiled: October 24, 2007Date of Patent: February 4, 2014Assignee: Pirelli Tyre S.p.A.Inventors: Barbara Rampana, Diego Tirelli, Udo Kuhlmann, Chokri Cherif, Christian Paul, Refah Ahmet Torun, Olaf Diestel
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Publication number: 20130042593Abstract: A tire includes at least one structural element which includes at least one reinforcing element which includes at least one hybrid yarn, the at least one hybrid yarn including a plurality of filaments obtained from at least one first multifilament yarn having a first initial tangent modulus and at least one second multifilament yarn having a second initial tangent modulus, the first and the second initial tangent modulus being different from each other, each one of the first and the second multifilament yarn including a plurality of individual filaments, the individual filaments of each one of the first and the second multifilament yarns being at least partially intermixed with each other. The tire may be a high performance or ultra high performance tire, or a tire suitable for being employed in sporting contests such as track motor races, or a tire suitable for sports utility vehicles.Type: ApplicationFiled: October 19, 2012Publication date: February 21, 2013Inventors: Barbara RAMPANA, Diego TIRELLI, Udo KUHLMANN, Chokri CHERIF, Christian PAUL, Refah Ahmet TORUN, Olaf DIESTEL
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Publication number: 20100224298Abstract: A tire includes at least one structural element which includes at least one reinforcing element which includes at least one hybrid yarn, the at least one hybrid yarn including a plurality of filaments obtained from at least one first multifilament yarn having a first initial tangent modulus and at least one second multifilament yarn having a second initial tangent modulus, the first and the second initial tangent modulus being different from each other, each one of the first and the second multifilament yarn including a plurality of individual filaments, the individual filaments of each one of the first and the second multifilament yarns being at least partially intermixed with each other. Preferably, the tire is a high performance or ultra high performance tire, or a tire suitable for being employed in sporting contests such as track motor races, or a tire suitable for sports utility vehicles.Type: ApplicationFiled: October 24, 2007Publication date: September 9, 2010Applicant: PIRELLI TYRE S.PA.Inventors: Barbara Rampana, Diego Tirelli, Udo Kuhlmann, Chokri Cherif, Christian Paul, Refah Ahmet Torun, Olaf Diestel
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Patent number: 7123024Abstract: A device is disclosed, comprising a microwave resonator, for or on a spinner preparation machine with drawing gear (2) for drawing fiber material (FB), in particular a carding, drawing or combing machine, whereby the resonator (30) is embodied for connection to a measuring device (16) for measuring the strip density (mass per unit length) or the strip thickness and/or the dampness of the fiber material (FB), continuously passing through the resonator chamber (31). Said device is characterized in that the resonator (30) is integrated in a functional group (20; 120; 220; 320; 420) of the spinner preparation machine which is typical for the machine. A spinner preparation machine, in particular a carding, drawing or combing machine, is further disclosed which comprises a corresponding device.Type: GrantFiled: February 13, 2004Date of Patent: October 17, 2006Assignee: Rieter Ingolstadt Spinnereimaschinenbau AGInventors: Wolfgang Göhler, Chokri Cherif
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Publication number: 20060207238Abstract: Proposed is a spinning method for the direct spinning of sliver (FB?) by means of a ring spinning machine (200), whereby one or more slivers (FB?), which said slivers were previously produced in a carding (100) or a combing machine, were drafted in a first draft system (4) situated upstream of the said ring spinning machine (200) to produce a single sliver (FB?), which, without the interposition of a flyer was made available to the ring spinning machine (200), in which the said single sliver (FB?), by means of a second draft system (204) is drawn and formed into a yarn (G). The invented method characterizes itself in that the sliver (FB?), at the output of the first draft system (4) has a band weight less than 2.5 ktex and is provided with a protective winding, and in that this sliver (FB?) in the second draft system (204) is subjected to a draft of more than 30. Likewise, an apparatus to carry out this method is also proposed.Type: ApplicationFiled: March 1, 2006Publication date: September 21, 2006Inventor: Chokri Cherif
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Patent number: 7103440Abstract: The invention uses microwaves in the spinning industry in order to determine the band mass of an elongated, substantially non-twisted fiber structure. In addition, a method for measuring the sliver mass from the frequency detuning and the damping of resonance signals of a microwave sensor while taking into consideration the moisture of the fiber structure with a computer is suggested. Likewise, a corresponding spinning preparation machine and a laboratory device for measuring the sliver mass are part of the invention. Lastly, a method and a spinning preparation machine for recognizing foreign matter in a moved fiber structure with the aid of microwaves is suggested.Type: GrantFiled: October 29, 2002Date of Patent: September 5, 2006Assignee: Rieter Ingolstadt Spinnereimaschinenbau AGInventors: Joachim Dämmig, Chokri Cherif
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Publication number: 20060168764Abstract: A method is suggested for operating a spinning-mill preparing machine (1) with a control apparatus (20), especially a draw frame, card or combing machine, in which a running fiber structure (FV) is conducted through a measuring area (26, 26?,33) of a measuring apparatus (25, 25?, 32) and a measuring signal (S(t); Sa(t), Se(t)) is generated that represents the length-specific mass (M) of the fiber structure (FV) located in the measuring area (26, 26?,33), in which a corrected measuring signal (SK(t); SKa(t), SKe(t)) is generated in that a correction value (K0, K1, K2; Ka, Ke) is added to the measuring signal (S(t); Sa(t), Se(t)), and in which the determination of the correction value (K0, K1, K2; Ka, Ke) takes place by the following steps controlled by the control apparatus (20) of the spinning-mill preparing machine (1): The fiber structure (FV) is removed from the measuring area (26, 26?,33) by pneumatic and/or mechanical means (27, 13,14; 28), Then, an empty measuring is performed, and The correction vaType: ApplicationFiled: January 13, 2006Publication date: August 3, 2006Inventor: Chokri Cherif
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Spinning preparatory machine and a housing for a drafting assembly of a spinning preparatory machine
Publication number: 20060143872Abstract: The present invention concerns a spinning preparatory machine (1) with a drafting assembly (4) encompassing multiple roll pairs (5, 6, 7) by which a fiber band (FB?) can be drafted. The roll pairs (5, 6, 7) possess upper rolls (5a, 6a, 7a) and under rolls (5b, 6b, 7b). The roll pairs (5, 6, 7) are installed in a housing (15), wherein the roll pairs are protected from ambient atmospheric conditions about the preparatory machine (1) and from components thereof. A temperature controller (20) functions with the housing (15) to bring about internally a desired operational temperature, which is independent of temperature external to the housing (15).Type: ApplicationFiled: October 26, 2005Publication date: July 6, 2006Inventor: Chokri Cherif -
Publication number: 20060137145Abstract: A spinning preparation machine includes a drafting device for drafting at least one fiber sliver. The machine includes a microwave sliver thickness sensor through which the fiber sliver is guided, the sensor disposed at the inlet or outlet, or both, of the drafting device and includes at least one cavity resonator defined by a resonator wall. A device or system is incorporated with the sensor for minimizing temperature-conditioned deformations of the resonator during measurement of sliver thickness.Type: ApplicationFiled: October 15, 2003Publication date: June 29, 2006Inventors: Otmar Kovacs, Chokri Cherif
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Publication number: 20060130283Abstract: A device with a drafting device (3) for drafting at least one sliver (FB) supplied to the drafting device (3) comprises a sliver depositing apparatus (4) downstream from the drafting device (3) for depositing the drafted sliver (FB?) into a can (6). Furthermore, the device comprises a can replacement device (15) for replacing a filled can (6?) by a can (6) to be filled. Means (17) is provided on the device for lowering the temperature (T) and/or the relative moisture (LF) of the fibrous material (FB, FB?) before or after it is deposited in the can (6). Furthermore, means (17) for raising the temperature TU of the machine parts (13, 20) that make contact with the uppermost sliver layers (BL) in the filled can (6?) can be provided, with which means (17) a condensation of water on the cited machine parts (13, 20) is at least reduced.Type: ApplicationFiled: November 8, 2005Publication date: June 22, 2006Inventors: Michael Strobel, Helmut Mattis, Chokri Cherif, Peter Schulz
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Publication number: 20060071670Abstract: A device is disclosed, comprising a microwave resonator, for or on a spinner preparation machine with drawing gear (2) for drawing fibre material (FB), in particular a carding, drawing or combing machine, whereby the resonator (30) is embodied for connection to a measuring device (16) for measuring the strip density (mass per unit length) or the strip thickness and/or the dampness of the fibre material (FB), continuously passing through the resonator chamber (31). Said device is characterized in that the resonator (30) is integrated in a functional group (20; 120; 220; 320; 420) of the spinner preparation machine which is typical for the machine. A spinner preparation machine, in particular a carding, drawing or combing machine, is further disclosed which comprises a corresponding device.Type: ApplicationFiled: February 13, 2004Publication date: April 6, 2006Inventors: Wolfgang Gohler, Chokri Cherif
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Publication number: 20060021197Abstract: A revolving plate for a sliver depositing device of a sliver-producing or sliver-processing spinning preparation machine is suggested that is designed for depositing sliver supplied in a running manner into a container (10), which revolving plate (1) has a press surface (7) arranged vertically to its axis of rotation (11) for pressing the deposited sliver into the container (10) and has a sliver passage (2) with a helical spatial curve , whereas the entrance opening (5) of the sliver passage (2) is arranged in such a manner that the supplied sliver enters into the sliver passage (2) parallel to the axis of rotation (11) of the revolving plate (1) and without bends, and whereas the exit opening (6) of the sliver passage (2) is in the plane of the press surface (7).Type: ApplicationFiled: July 15, 2005Publication date: February 2, 2006Inventors: Michael Strobel, Chokri Cherif, Gerhard Schwaiger
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Patent number: 6983516Abstract: Different improvements of a spinning preparation machine are proposed to measure the fiber sliver thickness or the fiber sliver cross-section of at least one fiber sliver by means of one or several microwave sensors. One improvement is characterized by compressing means and special mechanical guiding elements that can be installed before, after and/or in the microwave sensor. It is also proposed to install a pair of conveyor rollers after a microwave sensor that can be designed in particular as an input roller pair of the subsequent drafting equipment. Furthermore, proposals are made for the calibration of the (at least one) microwave sensor.Type: GrantFiled: April 3, 2003Date of Patent: January 10, 2006Assignee: Rieter Ingolstadt Spinnereimaschinenbau AGInventors: Joachim Dämmig, Michael Ueding, Chokri Cherif
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Publication number: 20050198784Abstract: Proposed is a procedure and an apparatus for the drafting of at least one fiber band by means of a controlled preparatory drafting operation for a spinning machine, in particular a carding or a drafting frame, which possesses successively arranged roll-pairs (5, 6, 7) for corrective drafting, whereby the cross-section or the bulk, or the thickness of the at least one fiber band, or drafting from standard measurements is measured upstream of a roll-pair (5, 6, 7) and, based upon the corresponding measurement signals, the speed of rotation of at least one roll (5a) of a first roll-pair (5) is controlled by a first control circuit (30) and the rotational speed of at least one roll (6a) of a second roll-pair (6) is controlled by a second control circuit (35; 40).Type: ApplicationFiled: February 11, 2005Publication date: September 15, 2005Inventor: Chokri Cherif