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| Number | Title | Issue Date |
| 7373792 | Method for producing optical components For producing large volume optical components of high optical quality from synthetic quartz glass blanks, the latter are heated in a component mold in a furnace with a protective gas atmosphere to a temperature 50° to 170° K above the softening point, this tempera... | 05/20/2008 |
| 7313930 | Method and apparatus for manufacturing glass substrate for storage medium A method of manufacturing a glass substrate for a storage medium by pressing a glass material between an upper and a lower dies. The method includes a heating step of heating the glass material arranged between the upper and lower dies, a pressing step of pressing t... | 01/01/2008 |
| 7255550 | Press-molding mold A press-molding mold includes a first mold (10), a second mold (20), a complementary element (30) arranged between the first mold (10) and the second mold (20), a washer (40) arranged between the second mold (10) and ... | 08/14/2007 |
| 7228717 | Apparatus for glass sheet forming with cross curvature A glass sheet forming system (20) provides continuous roll conveyed forming of heated flat glass sheets to formed shapes having a major axis of curvature and a minor axis of curvature perpendicular to each other. The forming is performed by a roll station ( | 06/12/2007 |
| 7147454 | Optical lens molding apparatus and precision molding apparatus An optical lens molding apparatus includes a cylindrical mold, a first mold core, a second mold core and a correctional ring. The first and the second mold core have a columnar shape and are disposed inside the cylindrical mold to form a cavity. Furthermore, the fir... | 12/12/2006 |
| 7134298 | Method of press-forming glass An object of the present invention is to provide a press-forming method for glass capable of uniformly heating press dies and a preform and preventing oxidation of the press dies. According to the press-forming method for glass of the present invention, a preform is... | 11/14/2006 |
| 7051554 | Tightening a fiber roll cover Rolls for generally conveying sheets, such as of steel or glass over a roller typically have a steel mandrel and fiber-containing roll cover, with the fiber roll cover pressed between end plates. In a roll end assembly including the end plates there is now provided ... | 05/30/2006 |
| 7013676 | Press molding apparatus In a press molding apparatus for press molding a plurality of glass materials into a plurality of glass optical elements by the use of a pressing mold including upper and lower molds each of which has a plurality of molding surfaces, at least one of the upper and th... | 03/21/2006 |
| 6718799 | Die and glass material for forming glass substrate, method for manufacturing glass substrate, and magnetic disk glass substrate A glass material (4) is placed in a forming die including a pair of upper and lower dies (1, 2) and a control member (3) for controlling the space between the upper and the lower die, and then heated, softened, and molded by pressure into a glas... | 04/13/2004 |
| 6363750 | Automatic pipette puller and forge A glass tube is positioned over a heater and stretched until drawn apart into two drawn portions. A controlled pulling force is applied to the tube by a powered driver such as a linear motor. After separation, one of the drawn glass portions is reposition... | 04/02/2002 |
| 6321020 | Glass substrate and two-stage molding method therefor There is provided a glass substrate having a V-groove portion for arranging an optical fiber core and a countersunk portion for containing an optical fiber coated portion, formed on the extension of the V-groove portion, on the surface thereof. The surfac... | 11/20/2001 |
| 6141991 | Press molding apparatus for glass optical elements and molding method for glass optical elements Disclosed are a molding apparatus for glass optical elements a plurality of molds each constituted of an upper mold and a lower mold, a matrix supporting the molds, and heating means wound around the matrix for heating the molds, wherein the matrix extend... | 11/07/2000 |
| 6070436 | Manufacturing method for molded glass articles Disclosed is a manufacturing method for molded glass articles including glass optical elements such as high precision lenses not requiring grinding and polishing after press molding. The manufacturing method according to the invention is a method for manu... | 06/06/2000 |
| 6003338 | Molding method for optical element A molding method for optical element is disclosed in which a glass material prepared for weight is introduced into a mold and then heated to soften, and subsequently pressed with the mold to mold an optical element. The glass material is heated to have a ... | 12/21/1999 |
| 6003339 | Glass compression molding machine and machining chamber therefor A molding die assembly includes an upper molding die and a lower molding die facing the upper molding die with provision for their alignment. The upper molding die includes an upper core, while the lower molding die includes a hollow cylinder and a lower ... | 12/21/1999 |
| 5994248 | Optical lenses and processes of manufacture The invention relates to lenses such as aspherical lenses and to a process for their manufacture. According to the invention, the lens is composed of a glass matrix including the constituents below in the following weight proportions: __________... | 11/30/1999 |
| 5987922 | Manufacturing method for molded glass articles A manufacturing method for molded glass articles including glass optical elements such as high precision lenses not requiring grinding and polishing after press molding. The manufacturing method according to the invention is a method for manufacturing the... | 11/23/1999 |
| 5974836 | Device used for the bending of plate glass into convex shapes A device used for the bending of plate glass sections (3) includes an oven (1), a bending chamber (6), an upper bending mold installed in the bending chamber (6) in such a manner as to be able to be raised and lowered, a duct producing a flow of hot gas i... | 11/02/1999 |
| 5938807 | Method for manufacturing press-molded glass object and apparatus therefor In press molding, a shaft (metal mold 13) is moved by positional or torque control to cause upper and lower molds to reach a set position slightly before a position where the upper and lower molds are set in a final mold closed state. As soon as the upper... | 08/17/1999 |
| 5928398 | Method and apparatus for bending and tempering glass sheets An apparatus for bending and tempering glass sheets includes a roll conveyor for supporting a glass sheet, the glass sheet having a top and a bottom surface. The roll conveyor includes a plurality of vertically movable rolls for arching the conveyor to a ... | 07/27/1999 |
| 5876477 | Apparatus for heating and bending glass sheets involving raising a glass sheet towards furnace heat sources When heating and bending glass sheets in a furnace, it has been found to be desirable to raise the glass sheets towards the furnace heat sources to increase obtainable temperature differentials and reduce heating power. An apparatus for bending the glass ... | 03/02/1999 |
| 5858048 | Energy efficient, electric rotary furnace for glass molding (repressing) precision optical blanks A furnace for molding glass blanks includes a housing having a series of electrical heating stations and a rotary door adapted to receive glass blanks for processing. The furnace also includes a rotary turntable for receiving the glass blanks and a steeri... | 01/12/1999 |
| 5849056 | Electrically activated flexible press for shaping heat softenable sheet material The present invention provides a shaping mold for shaping heat softenable sheet material which includes a flexible rail having a sheet shaping surface to support a marginal edge portion of a sheet to be shaped and a plurality of controllable actuators sec... | 12/15/1998 |
| 5817161 | Optical element forming method In forming a piano-convex lens from a column-like lens blank by heating the blank to a temperature higher than the transition temperature thereof and by pressurizing an upper die with a closed space formed between the blank and the upper die, there are al... | 10/06/1998 |
| 5782946 | Method for manufacturing press-molded glass object In press molding, a shaft (metal mold 13) is moved by positional or torque control to cause upper and lower molds to reach a set position slightly before a position where the upper and lower molds are set in a final mold closed state. As soon as the upper... | 07/21/1998 |
| 5766294 | Method and apparatus for producing an optical element using a molding block and a temperature effecting mechanism contacting the molding block for heat exchange A method and an apparatus for producing an optical element capable of performing a molding temperature control required for a plurality of independent molding blocks in a short period of time, and continuously and simultaneously producing a plurality of d... | 06/16/1998 |
| 5713975 | Method and apparatus for producing blank-molded glass bodies for optical equipment When blank-molded optical glass bodies are manufactured according to known methods based on blank-molding technology, the product exhibits rings in the glass and folds as well as an impression that precisely coincides with the contact surface of the paris... | 02/03/1998 |
| 5695537 | Apparatus for and method of bending glass sheets An apparatus for press bending glass sheets carried on a mold, the apparatus including a die having a lower surface shape to mold a glass sheet positioned thereunder to a desired curved shape, a first counterbalance assembly connected to the die for provi... | 12/09/1997 |
| 5679123 | Method of heating and bending glass sheets When heating and bending glass sheets in a furnace, it is desirable to raise the sheets towards the furnace heat sources to increase obtainable temperature differentials and reduce heating power. Disclosed is a method of bending a glass sheet on an appara... | 10/21/1997 |
| 5634957 | Apparatus for and method for bending glass sheets An apparatus for press bending glass sheets, the apparatus comprising an upper die, a suspension system for the upper die for suspending and vertically moving the upper die, a lower gravity bending mould and a plurality of spacer devices for spacing the u... | 06/03/1997 |
| 5630859 | Optical element forming method In forming a plano-convex lens from a column-like lens blank by heating the blank to a temperature higher than the transition temperature thereof and by pressurizing an upper die with a closed space formed between the blank and the upper die, there are al... | 05/20/1997 |
| 5616161 | Machining chamber for a glass compresson molding machine A machining chamber encloses a glass molding apparatus including a molding die assembly composed of upper and lower molding dies cooperating to define a mold therebetween. The glass molding apparatus, contained within the sealed machining chamber, further... | 04/01/1997 |
| 5540746 | Glass forming apparatus A glass rod used as a molding material is inserted into a cylinder, pressed and heated with a temperature gradient in which the tip side of the glass rod is at a higher temperature. The glass rod is melted on the tip side thereof, and it is solidified on ... | 07/30/1996 |
| 5538528 | Glass optical element press-molding die having a tantalum containing alloy surface layer A die for press-molding a glass optical element which includes a base material having a surface to press-mold glass and a tantalum(Ta)-containing alloy thin layer on the surface, the base material being heat-resistant and strong enough to withstand press-... | 07/23/1996 |
| 5346523 | Method of molding chalcogenide glass lenses An infrared transmitting chalcogenide glass lens having precision optical surfaces of different curvature radii is molded. A pair of molds having different curvature radiuses from each other, and a bushing which controls the thickness of the lens is provi... | 09/13/1994 |
| 5344476 | Method for forming an optical element An improved method of forming an optical element, wherein heated upper and lower molds are used in conjunction with radiation heating glass material placed in an optical forming surface of the lower mold. The molds are heated to a necessary temperature, t... | 09/06/1994 |
| 5250099 | Glass molding process and molding apparatus for the same Disclosed is a glass molding process using an apparatus for manufacturing a glass preform into a glass molded product. In the process a mold is prepared for pressing the glass preform. The mold consists of a pair of molds having a cavity surface for formi... | 10/05/1993 |
| 5228894 | Press-forming method for optical element A method for press-forming a glass preform includes the steps of applying positioning pressure to an upper mold as the temperature of the upper mold and a lower mold increase to set values, maintaining a first temperature difference between the upper and ... | 07/20/1993 |
| 5114455 | Mold for producing lens, using mold recesses to aid in lens release A mold for use in producing a lens comprises a pair of first and second mold portions which are arranged in opposed relation to each other. At least one of the first and second mold portions is movable toward and away from the other. Molding surfaces of t... | 05/19/1992 |
| 5032160 | Method of press molding lens material A lens molding method where a lens material is set between an upper mold and a lower mold, and the molding pressure is reduced or made zero at least once during a heating & pressing step without the mold surfaces breaking contact with the lens materials, ... | 07/16/1991 |
