Patents Assigned to Feldmuhle Aktiengesellschaft
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Patent number: 5338405Abstract: In a process for manufacturing chemo-mechanical and/or chemothermal-mechanical wood pulps, raw materials containing lignocellulose, such as wood shavings, wood chips, pre-ground wood or sawdust, are first impregnated with an aqueous alcoholic SO.sub.2 solution and then heated to a temperature between 50.degree. and 170.degree. C. for a period of 1 to 300 minutes. The wood shavings are then ground to the desired degree of fineness in a defibrinating device. The process makes it possible to achieve up to 50% reduction in grinding energy in comparison with known chemothermal-mechanical processes.Type: GrantFiled: May 18, 1992Date of Patent: August 16, 1994Assignee: Stora Feldmuhle AktiengesellschaftInventors: Rudolf Patt, Georg Rachor
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Patent number: 5334449Abstract: In the abstract No. 75-35061W of the WPI, Week 7521, Derwent P. L. London (citing JP-A-118906/1974) there is disclosed a paper with a cover coat applied by the cast coating process, for whose preparation first a prime coat is applied whose pigment composition consists of 30 wt. % of kaolin and 60 wt. % of a polystyrene pigment, and whose binding agent composition includes 10 weight-parts casein and 16 weight-parts of a carboxylated butadiene-styrene latex. After this prime coat has dried a mixture of 80 weight-parts of kaolin, 20 weight-parts of calcium carbonate, 10 weight-parts of casein and 8 weight-parts of a butadiene-styrene latex is applied and the applied composition is pressed at a temperature of 90.degree. C. against a chrome-lacquered surface.Type: GrantFiled: February 25, 1993Date of Patent: August 2, 1994Assignee: Stora Feldmuhle AktiengesellschaftInventors: Werner Bergmann, Paul H. Dahling
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Patent number: 5314753Abstract: A matte printing paper, excepting bank note and security document paper, especially for offset or intaglio printing, is coated with a composition containing calcium carbonate as a coating pigment, a binding agent for absorption of printing ink and 10 to 65% by weight, based on its total solids content, of ungelatinized starch granules, except rice starch granules.Type: GrantFiled: November 12, 1992Date of Patent: May 24, 1994Assignee: Stora Feldmuhle AktiengesellschaftInventor: Werner Bergmann
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Patent number: 5284813Abstract: The upper surface of an upper sheet for a carbon copy system made of pressure-sensitive self-copying paper has a layer, designed to be printed on, made of pigment, binder and water-repelling agent, to increase the opacity and control the bonding properties for ease of sheet detachment.Type: GrantFiled: December 3, 1991Date of Patent: February 8, 1994Assignee: Feldmuhle AktiengesellschaftInventor: Horst W. Heyer
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Patent number: 5032215Abstract: Combinations of frictional and sealing elements made from hard substances, such as sintered aluminum oxide, are ground and lapped at their surfaces of engagement. At least one surface has at least some micro-blurred areas. The micro-blurring is produced by chemical etching. Phosphoric acid can be used as the chemical etching, and in thermal etching, the etching temperature is between 1400.degree. and 1560.degree. C.Type: GrantFiled: September 7, 1988Date of Patent: July 16, 1991Assignee: Feldmuhle AktiengesellschaftInventors: Ulf Dworak, Dieter Fingerle, Kilian Friederich, Hans Olapinski
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Patent number: 4859650Abstract: A pressure-sensitive recording material is disclosed, having microcapsules containing a triphenylmethane leuco-dye dissolved in a solvent composed at least 80% of plant, animal or paraffin oils, the microcapsule walls being formed of a wall material which is water-soluble or water-dispersible before the formation of the microcapsules.Type: GrantFiled: September 30, 1987Date of Patent: August 22, 1989Assignee: Feldmuhle AktiengesellschaftInventors: Bodo Hilterhaus, Gunther Hunger
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Patent number: 4840154Abstract: A tubular ceramic body for gas passages in a cylinder head of an internal combustion engine comprises a tubular piece having an opening, two separate tubular portions each having an end side and provided with an opening at the end side, the tubular portions merging into the tubular piece in a transition region, and a connection provided between the tubular portions at least in the transition region of the tubular portions into the tubular piece, the ceramic body being formed as a one-piece member produced in a single sintering process from a single material, and the connection of the tubular portions being formed by a common wall.Type: GrantFiled: February 8, 1988Date of Patent: June 20, 1989Assignee: Feldmuhle AktiengesellschaftInventors: Dieter Fingerle, Wolf-Dieter Gundel
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Patent number: 4716869Abstract: A tubularly formed valve guide (1) with a bore for a metal valve shank (2) for use in an internal combustion engine comprising a sintered body of a partially stabilized zirconium oxide having a porosity of less than 3%. Even under extreme stress, e.g., in an outlet valve of a high-power engine, but in particular in the blow-off valve of an exhaust gas turbocharger, the valve guide shows a considerably reduced wear as compared to conventional valve guides.Type: GrantFiled: August 1, 1986Date of Patent: January 5, 1988Assignee: Feldmuhle AktiengesellschaftInventors: Ulf Dworak, Hans Olapinski, Dieter Fingerle, Ulrich Krohn
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Patent number: 4662889Abstract: A knee joint prosthesis includes a C-shaped femur cap to be fitted onto a resected femur condyle. The C-shaped femur cap is made up of two arch-shaped parts spaced apart and connected by a relatively flat third part. Each of the arch-shaped parts has a different radius. The arch-shaped part with the larger radius has an oblong hole extending in the circumferential direction of the part. A shaft can be placed through the oblong hole from the femur into the tibia. In addition, a tibia cap can be fitted onto the plateau of the tibia.Type: GrantFiled: April 26, 1984Date of Patent: May 5, 1987Assignee: Feldmuhle AktiengesellschaftInventors: Ludwig Zichner, Erhard Dorre, Peter Prussner, Horst von Borries
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Patent number: 4622267Abstract: In microcapsules of the type used for pressure-sensitive, carbonless copy papers, having walls formed from aliphatic diisocyanate and diamine and containing a solvent mixture with a dye precursor dissolved therein, the solvent mixture containing a component which easily dissolves the dye precursor and the capsule wall material and a component which only poorly dissolves the dye precursor and the capsule wall, the improvement comprising the poorly disolving solvent component is an alkylbenzene having from 8 up to 14 C-atoms in the alkyl moiety; and the easily dissolving solvent component is selected from the group consisting of diisopropyl naphthaline, a hydrogenated terphenyl, an alkylated diphenyl, a diphenyl alkane, a chloroparaffin and a mixture thereof, the ratio of easily to poorly dissolving components ranging from 15:85 to 75:25 vol %, and being adjusted within this range so that a solution of the wall-forming aliphatic diisocyanate is just at the turbidity point in the mixture of easily dissolving andType: GrantFiled: December 12, 1984Date of Patent: November 11, 1986Assignee: Feldmuhle AktiengesellschaftInventor: Kurt Riecke
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Patent number: 4618049Abstract: In lubricated friction couplings, at least two surfaces are connected by frictional engagement. These surfaces in engagement with one another are termed friction partners. One friction partner consists of a ceramic material and the other friction partner consists of a metallic material or a ceramic material having a chemical composition other than that of the first friction partner. The metallic material is a material of the iron group, preferably sintered metal. The ceramic material is oxide ceramic, especially aluminium oxide or zirconium oxide or silicon nitride. The pairing of metal, especially sintered steel, against oxide ceramic increases the service life of the coupling while at the same time reducing the coupling travel.The ceramic material can be connected to a carrier member, for example in the form of segments sintered into the carrier member.Type: GrantFiled: February 3, 1983Date of Patent: October 21, 1986Assignee: Feldmuhle AktiengesellschaftInventors: Hermann Pflaum, Herbert Vojacek
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Patent number: 4616963Abstract: Ceramic cutting tips for cutting-tools are provided with an encircling bevel and a shaping stage for the chip. The bevel (3) runs at an angle (.alpha.) of from 15 to 35 degrees and adjacent thereto there is a channel (5) which has a cross-section in the form of a segment of a circle, the chord (6) of which also runs at an angle of from 15 to 35 degrees with respect to the top surface (4). The length of the chord (6) is between 0.5 and 1.5 mm and the radius (R) of the channel (5) is between 0.6 and 2.5 mm. The hollow channels (5) run out in the corner region of the cutting tip (2) and form a nose (8).Type: GrantFiled: February 24, 1983Date of Patent: October 14, 1986Assignee: Feldmuhle AktiengesellschaftInventors: Guy Habert, Harald Kraft
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Patent number: 4613308Abstract: A jaw implant shaped and proportioned to provide firm seating and sufficiently great resistance to tractive forces. The implant has a bore for receiving a tooth holder and has at its apical end a spherical segment. The implant has truncoconical portions and an approximately cylindrical portion provided for embedding in the cortical bone tissue. The truncoconical portions and the approximately cylindrical portion have approximately elliptical cross sections.Type: GrantFiled: May 28, 1985Date of Patent: September 23, 1986Assignee: Feldmuhle AktiengesellschaftInventor: Peter A. Ehrl
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Patent number: 4601930Abstract: A mutilayer film, as shown in FIG. 3, consists of a support film (6) and a blown, coextruded composite film (1), which is joined to the support films (6) by means of an adhesive (5) and is interlocked into a tube (1'). The layers of the composite film (1) consist of polyethylenes or polyethylene copolymers of different mechanical shock resistance. At least one of the polyethylenes or polyethylene copolymers has a mechanical shock resistance of more than 100 cN. The composite film (1), interlocked into a tube (1'), has two outer layers (A, A') of corresponding material and thickness and two inner layers, (B, B') of corresponding material thickness. The inner layers (B, B') are connected by interlocking and the outer layers (A, A') are connected to the inner layers (B, B') by melt bonding.Type: GrantFiled: October 24, 1983Date of Patent: July 22, 1986Assignee: Feldmuhle AktiengesellschaftInventor: Herbert Engelsberger
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Patent number: 4595663Abstract: Ceramic shaped articles are disclosed which are formed of dense, non-metallic, mechanically resistant materials and contain eutectic constituents consisting of zirconium oxide, hafnium oxide and at least one other high-melting oxide and mixtures thereof. The composition exhibits excellent hardness, wear properties and bending strength. A method for preparing the articles is also disclosed wherein the appropriate mixture in a hypoeutectic, eutectic, or hypereutectic ratio is heated to its melting point, poured into a preheated mold and cooled.Type: GrantFiled: January 9, 1984Date of Patent: June 17, 1986Assignee: Feldmuhle AktiengesellschaftInventors: Ulrich Krohn, Hans Olapinski, Ulf Dworak
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Patent number: 4580438Abstract: In a method and apparatus for testing the duplicating characteristics of pressure-sensitive duplicating sheets and duplicating sets produced therefrom, a stroke grid is drawn on the duplicating sheets to be tested by means of a marking stylus which is actuated either by mechanical or electromechanical devices to apply a selective a contact force, with the grid being evaluated either visually or by photoelectric reflectance measurement, the stroke grid consisting essentially of a plurality of individual strokes which overlap or are closely adjacent but which do not intersect.Type: GrantFiled: April 5, 1984Date of Patent: April 8, 1986Assignee: Feldmuhle AktiengesellschaftInventor: Dieter Horand
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Patent number: 4549930Abstract: An uncoated paper web suitable for rotogravure printing with water-immiscible solvent-containing inks, the fibers of the web being partially or totally enveloped with a clay hydrogel, the clay being hydratable, colloidal and film-forming. The web provides superior printing results in rotogravure printing. A method for printing the web is disclosed.Type: GrantFiled: April 2, 1980Date of Patent: October 29, 1985Assignee: Feldmuhle AktiengesellschaftInventor: Guido Dessauer
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Patent number: 4547427Abstract: A multilayer film and containers made thereof, the film being composed of a four layer composite film produced by flattening upon itself, a two layer coextruded blown tube, the outer layer of said tube being linear polyethylene or high density polyethylene, and the inner layer of said tube being ethylene methacrylic acid copolymer crosslinked with metal ions or an ethylene vinylacetate copolymer, said outer layer and said inner layer of said tube being secured to one another by melt-bonding, whereas the surfaces of said inner layer being secured to one another by a mechanical, detachable heat-bonding, said heat-bonding being achieved by flattening said tube and contacting said surfaces under the influence of heat and pressure.Type: GrantFiled: April 18, 1984Date of Patent: October 15, 1985Assignee: Feldmuhle AktiengesellschaftInventor: Herbert Engelsberger
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Patent number: 4538306Abstract: An implantable elbow joint for connecting the upper arm and the forearm includes an axially extending sleeve of C-shape transverse cross-section, a cylindrical member engageable within the sleeve, and a connecting member implantable in the ulna and engageable with the cylindrical member in the sleeve. The sleeve embraces the trochlea of the humerus through an angle of more than 180.degree. about the sleeve axis and also serves as the abutment for supporting the radius. The sleeve has a slot extending in the radial and the circumferential directions. At least in the region of the slot, the internal surface of the sleeve is formed by a cylindrically shaped surface. A cylindrically shaped sliding member is supported in the sleeve in the region of the slot. An elongated shaft is arranged to be inserted into the ulna with one end projecting out of the ulna and extending through the slot into the sliding member.Type: GrantFiled: June 22, 1983Date of Patent: September 3, 1985Assignee: Feldmuhle AktiengesellschaftInventors: Erhard Dorre, Peter Prussner, Ludwig Zichner
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Patent number: 4535683Abstract: A piston arrangement with a metal shaft, a piston head that is attached to it with a shrink ring, and a member made of partially stabilized zirconium ozide. The top which demarcates the combustion chamber, of the piston head, consists entirely of the member made of partially stabilized zirconium oxide. The bottom of the zirconium-oxide member is a truncated cone and the top of the shaft is a truncated cone. They are surrounded by an annular component that is split into two sections parallel to the longitudinal axis of the piston. The annular ocmponent is secured with an outside shrink ring.Type: GrantFiled: September 27, 1983Date of Patent: August 20, 1985Assignee: Feldmuhle AktiengesellschaftInventors: Ulf Dworak, Hans Olapinski, Dieter Fingerle, Ulrich Krohn