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| Number | Title | Issue Date |
| 6942756 | Fluororesin fiber paper, copper-clad laminate for printed board using the same and production process thereof The invention provides fluororesin fiber paper excellent in adhesion to a copper foil, heat resistance, chemical resistance, low water absorption and electric insulation and capable of being used as a substrate of a printed board suitable for use in high frequency, ... | 09/13/2005 |
| 6485608 | Manufacture of plain bearings The bearing comprises a metal backing, a sintered layer on said metal backing, and a lining layer infiltrated into pores of the sintered layer and standing proud thereof to provide a bearing surface. The lining layer comprises polytetrafluoroethylene incl... | 11/26/2002 |
| 6425977 | Manufacture of plain bearings A method of manufacturing a bearing material, a bearing material and a bearing having the bearing material on a strong backing are described. The method includes the steps of forming a water-based slurry having a solids content comprising 30 to 80% by vol... | 07/30/2002 |
| 6355140 | Method of manufacturing anti-falsification paper A method of manufacturing a thread-inserted window paper produces paper in which a thread is exposed to windows which are intermittently formed, and have clear contours, and in which thread is exposed surely at the window portions to make the thread clear... | 03/12/2002 |
| 6328849 | Method of manufacturing a soft, bulky single-ply tissue having a serpentine configuration and low sidedness The present invention relates to a soft, thick, single-ply tissue having a serpentine configuration and to a process for the manufacture of such tissue product having a basis weight of at least about 15 lbs./3,000 square foot ream and having low sidedness... | 12/11/2001 |
| 6035914 | Counterfeit-resistant materials and a method and apparatus for authenticating materials Fluorescent dichroic fibers randomly incorporated within a media provide an improved method for authentication and counterfeiting protection. The dichroism is provided by an alignment of fluorescent molecules along the length of the fibers. The fluorescen... | 03/14/2000 |
| 5783275 | Antifalsification paper An antifalsification paper is described having an embedded safeguarding thread which is embedded in the paper so as to be freely accessible in some areas. The safeguarding thread has a width greater than 2 mm. The antifalsification paper comprises at leas... | 07/21/1998 |
| 5055160 | Security paper with rigid segments A hybrid band that includes rigid segments into a paper web being formed in a paper manufacturing process. The band includes a carrier that has an adhesive surface for mounting the rigid segments thereon and spacing filler material between contiguous rigi... | 10/08/1991 |
| 5020581 | Process for inserting rigid segments in security paper A process for inserting rigid segments into a paper web being formed in a paper manufacturing process that includes the use of a paper forming screen roll, including the steps of cutting segments from a continuous rigid wire material and placing the rigid... | 06/04/1991 |
| 4964951 | Process for making secure paper product A process for making a paper product that includes both means for preventing images from being copied from the paper product by use of a xerographic photocopier; and means for enabling detection of the paper product when the paper product is transported t... | 10/23/1990 |
| 4784893 | Heat conductive circuit board and method for manufacturing the same A heat conductive circuit board includes an insulating layer provided on a metal substrate, and an electrically conductive metal foil formed on the insulating layer, and the insulating layer is formed by impregnating an alumina paper with organic polymer.... | 11/15/1988 |
| 4761205 | Security paper for currency and banknotes Security devices in the form of metalized plastic films are incorporated within a security paper such as banknotes and other valuable documents during the papermaking process for viewing solely by means of transmitted light. The devices comprise printing ... | 08/02/1988 |
| 4652324 | Process for the production of laminated sheet A process for the production of a laminated sheet is disclosed, which comprises impregnating a base paper for laminated sheet using a wood pulp having an -cellulose content of 87.0% or more with a synthetic resin to prepare a prepreg and subjecting... | 03/24/1987 |
| 4437935 | Method and apparatus for providing security features in paper A security device is integrally combined with the fibres of the paper in a paper-making process. A carrier web of water-dispersible fibres carrying the security element is brought into contact with the paper stock during the paper-making process. The carr... | 03/20/1984 |
| 4341596 | Method of preparing reinforced asbestos diaphragms for chlorine-caustic cells A resin modified asbestos diaphragm is prepared by diluting a heat curable polyvinylidene fluoride homopolymer resin latex containing no more than about 5% resin solids with an aqueous solution containing about 4% to 5% sodium hydroxide. From about 6 to a... | 07/27/1982 |
| 4326914 | Diaphragms for electrochemical cells and the manufacture thereof The invention relates to a method for the manufacture of diaphragms of fibrous potassium titanate and an organic binder for electrochemical cells and has as the object to develop such a method in such a direction that it allows the manufacture of diaphrag... | 04/27/1982 |
| 4260453 | Polymer-bonded crocidolite asbestos diaphragms and method for forming same Thermoplastic dispersions of fluoropolymers are intimately mixed with an aqueous slurry of crocidolite asbestos at very low pH, the resulting aqueous slurry mixture is formed into diaphragms for use in a chlor-alkali electrolytic cell while being de-water... | 04/07/1981 |
| 3960651 | Reinforced air-pervious polytetrafluorothylene sheet An air-pervious sheet predominantly of polytetrafluoroethylene, the sheet being reinforced by being fused to a liquid-pervious reinforcing material layer which is capable of retaining its original form even when heated to a temperature of 270° to 280° ... | 06/01/1976 |
| 3939055 | Laminated asbestos diaphragm Disclosed is a method of preparing an asbestos diaphragm where alkali metal ions are provided within the fibrous asbestos diaphragm, the diaphragm is heated to form an alkali metal silicate layer on the asbestos fibers, and thereafter a further layer of a... | 02/17/1976 |
