| Patent Number |
Title Of Patent |
Date Issued |
| 5284813 |
First sheet for copysets |
February 8, 1994 |
| 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. |
| 5032215 |
Method of etching ceramic frictional or sealing elements |
July 16, 1991 |
| 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 ac |
| 4840154 |
Tubular ceramic body for gas passages in cylinder head of internal combustion engine |
June 20, 1989 |
| 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 p |
| 4716869 |
Valve guide for an internal combustion engine |
January 5, 1988 |
| 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 |
| 4662889 |
Knee joint prosthesis |
May 5, 1987 |
| 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-shap |
| 4622267 |
Microcapsules having capsule walls formed of aliphatic diisocyanate and diamine |
November 11, 1986 |
| 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 |
| 4618049 |
Friction partners for lubricated friction couplings |
October 21, 1986 |
| 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 o |
| 4616963 |
Cutting tip for cutting-tools |
October 14, 1986 |
| 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 |
| 4613308 |
Jaw implant having an aperture to receive a replacement-tooth holder |
September 23, 1986 |
| 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 cylindric |
| 4601930 |
Carrier film backed with composite film |
July 22, 1986 |
| 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 poly |
| 4595663 |
Sintered ceramic shaped article wholly or predominantly of eutectic microstructure constituents |
June 17, 1986 |
| 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 exce |
| 4580438 |
Method and apparatus for testing the duplicating characteristics of pressure-sensitive duplicati |
April 8, 1986 |
| 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 |
| 4549930 |
Uncoated paper web for printing and method for making and using same |
October 29, 1985 |
| 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 |
| 4547427 |
Multilayer, sterilizable deep-drawing film |
October 15, 1985 |
| 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 |
| 4538306 |
Implantable elbow joint |
September 3, 1985 |
| 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 |
| 4535683 |
Piston with a member made of partially stabilized zirconium oxide |
August 20, 1985 |
| 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 |
| 4526824 |
Thermal insulation lining of ceramic material for a hot gas duct enveloped in metal |
July 2, 1985 |
| A thermal insulation lining (1) in the exhaust duct (4) of a cylinder head (5) consists of a sintered compact (2) of ceramic material having an envelope containing or consisting of inorganic fibers. |
| 4524732 |
Cylinder head of a piston engine |
June 25, 1985 |
| In a cylinder head (1) of a piston engine, a thermal insulation component having openings for the accommodation of valve seats, spark plugs, and injection nozzles consists of a circular aluminum titanate plate (2) which is shrink-fitted into a planar circular ring of zirconium oxide (12) |
| 4522415 |
Piston ring for an internal combustion engine |
June 11, 1985 |
| A piston ring (1) made of ceramic materials for an internal combustion engine comprising a body made by sintering of partially stabilized zirconium oxide (PSZ) which has a porosity <3% and, rolling surface (4) of the piston ring having a centerline average roughness R.sub.a of 0.03 to |
| 4522171 |
Pre-combustion or turbulence chamber for internal combustion engines |
June 11, 1985 |
| In a pre-combustion or turbulence chamber for an internal combustion engine, an inner molded body, defining an inner chamber, is formed of a material having a thermal conductivity of at least 12 W/(m.multidot.K). An outer body is secured to the outer surface of the inner body by shrinkin |
| 4519359 |
Mullite plate |
May 28, 1985 |
| In a cylinder head of a piston engine, the surface of the cylinder head facing the combustion chamber is covered by a plate having openings for valves, spark plugs or injection nozzles. The plate consists of mullite containing 2 to 30% by volume of zirconium oxide and/or hafnium oxide |
| 4495122 |
Method for the production of a polycrystalline shaped body of silicon carbide |
January 22, 1985 |
| Method for the production of a polycrystalline shaped body of silicon carbide of a density of at least 98% of the theoretical density of silicon carbide, prepared through pressureless sintering at temperatures from 1,900 to 2,200 C. from at least 97 weight % of .alpha.-silicon carbide |
| 4495029 |
Process for the preparation of coated paper and cardboard and coating materials for the performa |
January 22, 1985 |
| A method for the coating of a raw paper or cardboard substrate wherein the substrate is prepared having a pH of less than about 6.5, and a coating is applied thereto composed of an aqueous dispersion of a plastic and an inorganic pigment, the coating having a pH of more than about 6.5 wh |
| 4486543 |
Polycrystalline shaped body of silicon carbide and method for its production |
December 4, 1984 |
| Polycrystalline shaped body of a density of at least 98% of the theoretical density of silicon carbide, consisting of at least 92 weight % of .alpha.-silicon carbide and/or .beta.-silicon carbide, which is present in the form of a homogeneous texture with grains of maximal 10 .mu.m, and |
| 4486507 |
Transparent, shrinkable film, consisting of one or several layers |
December 4, 1984 |
| A transparent, shrinkable film composed of at least one layer which is a mixture of85-10 weight percent of a linear polyamide, linear copolyamide, or an elastomeric component, and15-90 weight percent of a partially aromatic polyamide or partially aromatic copolyamide.The films of the pre |
| 4484981 |
Papermaking dewatering apparatus having wire support means with cooling water feed means |
November 27, 1984 |
| Apparatus for processing paper wherein a pair of endless curved wire devices operate to pass therebetween a sheet material to be treated for a dewatering operation or the like. A support structure in the form of individual support segments made from sintered oxide ceramics are arranged |
| 4480950 |
Cutting tool |
November 6, 1984 |
| A cutting tool, such as a turning tool, includes a clamping holder with a recess in one of its surfaces, a cutting bit insertable into the recess, and a clamping shoe secured to the clamping holder by a clamping bolt. The clamping shoe has a projecting member engageable within a depressi |
| 4477212 |
Cutting tool |
October 16, 1984 |
| A cutting tool, such as a turning tool, includes a clamping holder on which a clamping shoe is secured. The clamping shoe has a curved surface projecting member adjacent one end for securing a cutting bit in a recess in a first surface on the clamping holder. The projecting member seats |
| 4468200 |
Helical mandibular implant |
August 28, 1984 |
| Mandibular implant of ceramic material in which a bottom portion for anchoring in the mandible has a substantially conical helix shape rounded off at the end. An upper portion has a concave section for receiving an epithelial sleeve by the concave section and an opening to accept a d |
| 4449085 |
Control for operation of a machine tool |
May 15, 1984 |
| To control the operation of a machine tool, which has a tool bit cutting a workpiece, the temperature of a measurement spot or area, such as on the cut surface of the workpiece, is checked by an optical element which collects infra-red radiation and focuses it on a thermal sensor. The |
| 4420142 |
Machine component of oxide ceramic material |
December 13, 1983 |
| A machine component is disclosed composed of 3.0 to 25 weight percent of zirconium oxide and/or hafnium oxide which are present in the interior of the machine component at room temperature predominantly in the metastable tetragonal modification and at the surface of the machine component |
| 4375824 |
Valve assembly with silencer |
March 8, 1983 |
| A valve assembly for controlling fluid flow, either of a single fluid or for mixing two different fluids such as hot and cold water, operates with a pair of interengaging valve plates having inlet orifices and outlet orifices defined therethrough actuated relative to each other to align |
| 4363631 |
Structural arrangement for oxide ceramic shafts |
December 14, 1982 |
| The shaft of a glandless pump which is made of sintered oxide ceramics in order to resist chemical attack is formed with a projection upon which there is mounted a metal sleeve having a bottom in order to enable a tool, such as a screwdriver, to be applied against the shaft for rotating |
| 4331534 |
Method of and arrangement for the de-inking of pulp suspensions |
May 25, 1982 |
| A pulp suspension of waste paper which is laden with air bubbles is introduced into a flotation cell. Fine air bubbles rise through the pulp suspension toward the top. Printing ink and other impurities are deposited on the bubbles which form a foam layer on the surface of the pulp su |
| 4312079 |
Femur head cap for endoprosthesis |
January 26, 1982 |
| A femur head cap for endoprosthesis possessing a spherical shape and having a recess for partially receiving the femur head, the recess being open toward the neck of the femur. The cap is advantageous in that it can be firmly anchored to avoid rotation and tilting without the use of bone |
| 4262935 |
Donor material for carbonless copying and coating composition for the same |
April 21, 1981 |
| A donor material for carbonless copying by contact with an acceptor material under applied pressure includes a sheet of paper or the like, and a coating on one face of the sheet. The coating consists essentially of a dye precursor, a wax solid at 20.degree. C. and capable of dissolving t |
| 4236998 |
Process and apparatus for purifying a fibrous suspension |
December 2, 1980 |
| In removing impurities, such as printing inks, binders, fiber fragments and pigments, from a fibrous suspension of waste paper containing water, the fibrous suspension is directed downwardly over an inclined sieve for removing the impurities through the sieve. In its length direction bet |
| 4221690 |
Coating composition for acceptor sheets in carbonless copying |
September 9, 1980 |
| Acceptor sheets for carbonless copying are prepared by coating a suitable substrate with an aqueous composition which, in addition to known dispersed acceptor materials, such as acid treated clays, contains at least one basic zinc salt substantially insoluble in water in an amount, a |
| 4218253 |
Sintered ceramic material of improved ductility |
August 19, 1980 |
| The ductility of sintered bodies of alumina and like hard substances can be improved without loss in mechanical strength by uniformly distributed individual particles of tetragonal zirconia or hafnia in amounts of 1%-50% by volume if the dispersed particles have an average size of 0.05 t |
| 4195470 |
False twisting apparatus |
April 1, 1980 |
| In a false twisting apparatus in which the yarn to be twisted passes between parallel, rotating shafts carrying axially spaced friction disks which radially overlap disks on the other shafts, the yarn-engaging circumferential faces of the disks are surfaces of rotation about the shaf |
| 4191403 |
Donor material for carbonless copying |
March 4, 1980 |
| In a donor material for carbonless copying which mainly consists of a carrier sheet and a multiplicity of frangible microcapsules containing a suitable dye precursor in a liquid medium and secured to one face of the sheet, spacer particles of soybean protein are interspersed in a rel |
| 4158338 |
Wall panel and assembly |
June 19, 1979 |
| A wall panel consisting of two laminar units each including a core layer of particulate, sintered, aluminum oxide, a perforated metal shell enveloping the layer, and a continuous mass consisting essentially of elastomeric material enveloping the shell and extending into the layer through |
| 4136604 |
Method and apparatus for separating individual blanks of a multiple cardboard blank |
January 30, 1979 |
| The individual cardboard box blanks of strings of blanks connected by scored, frangible bridge portions are separated by stacking the multiple blanks, clamping the stack of leading individual blanks to a vibratory support and the stack of the remainder of the blanks to a stationary feed |
| 4132826 |
Disposable blanket for an offset printing machine |
January 2, 1979 |
| A disposable sheet to replace the rubber blanket of an offset printing machine basically consists of a flexible carrier sheet and a coating on one face of the sheet consisting essentially of a cellular latex of a synthetic elastomer free from inorganic fillers in more than incidental |
| 4131710 |
Recording material containing asbestos |
December 26, 1978 |
| A recording sheet consisting mainly of fibrous material is capable of displaying a colored image when contacted under pressure with substantially colorless crystal violet lactone and similar dye precursors if at least 3% of the fibrous material is constituted by uniformly distributed |
| 4124439 |
High bulk paper of great stiffness |
November 7, 1978 |
| Paper having adequate mechanical strength and stiffness for use in xerographic equipment at a very low weight is prepared from a stock containing untreated cellulose fibers as well as cellulose fibers stiffened by impregnation with melamine-formaldehyde precondensate or methylolurea, |
| 4109048 |
Recording material containing gamma-alumina |
August 22, 1978 |
| A mixture of .gamma.-alumina and its precursors containing 1 to 30% water volatile at 1000.degree. C converts normally colorless dye materials such as crystal violet lactone, malachite green lactone, benzoyl leuco methylene blue and N-phenylleukauramine to the corresponding colored dyes |
