Class 65/81 - By differential gas pressure

Subclass of Class 65 - Glass manufacturing
Definition: Processes in which the forming step utilizes vacuum and/or
No. of patents: 37
Last issue date: 09/19/2006

Number	Title	Issue Date
7107793	Lithium-aluminosilicate glass ceramic with high keatite content and structural member made thereof A lithium-aluminosilicate glass ceramic is transformed by a suitable heat treatment into a glass ceramic comprising at least 80 vol.-% of keatite mixed crystals. This may be utilized for the preparation of optical or mechanical high-precision parts having a high tem...	09/19/2006
7073352	Method and a machine for the production of hollow glassware articles A method and a machine for the production of hollow glassware articles, by the blow-and-blow, press-and-blow, press-and-blow paste mold and direct-press processes in a glassware forming machine including single or multiple machine sections each having single or mult...	07/11/2006
7024887	Method and a machine for the production of hollow glassware articles A method and a machine for the production of hollow glassware articles, by the blow-and-blow, press-and-blow, press-and-blow paste mold and direct-press processes in a glassware forming machine including single or multiple machine sections each having single or mult...	04/11/2006
7000429	Roller table for carrying and transporting a hot glass band A roller table for supporting and transporting a hot glass strand. A plurality of rollers arranged parallel to each other and perpendicular to the transport direction of the glass strand are capable of being selectively rotated in the direction of transport of the g...	02/21/2006
6907754	Self-aligning impact tolerant I.S. machine cartridge assembly A cartridge assembly for a blow-and-blow parison-forming machine comprises a cylindrical barrel, an annular lower stop having a central opening for accepting a piston rod and having an upwardly opening tapered recess adjacent the central opening, an annular cylinder...	06/21/2005
6626010	Method for floating glass lump, method for preparing glass lump and method for preparing molded glass, and apparatus used for the methods A method of floating glass gobs by means of a gas flow. A method of manufacturing glass gobs by floating a molten glass gob and simultaneously cooling it. A method of manufacturing glass spheres by floating a softened glass gob and simultaneously renderin...	09/30/2003
6457331	I.S. machine A blank mold valving system for supplying vacuum/counter blow air to a blank mold of an I.S. The system includes an exhaust valve displaceable between open to exhaust and closed positions, a vacuum valve displaceable between open to vacuum and open to cou...	10/01/2002
6233973	Process for manufacturing a glass container A process for the formation of a container of glass, includes a first molding step performed in a preforming mold having pins projecting into the mold over a length less than the thickness of the walls of the preform of the article, the external walls of ...	05/22/2001
6205817	Method of pressing two mold portions together and controlling an internal gas pressure so as to create a hollow cone for receiving excess molding material A method of manufacturing a hollow cone having an open side and a cone tip. The method utilizing the steps of introducing a viscous material in a first mold portion, introducing a second mold portion and contacting the viscous material therewith, providin...	03/27/2001
5876475	Glass container forming process and equipment A method and apparatus for forming a glass container in a blow-and-blow process. The apparatus includes an air flow controller having a housing defining a chamber, a piston disposed for reciprocal movement from a first position to a second position within...	03/02/1999
5762672	Method for producing a quartz glass crucible In a quartz glass crucible obtained by heating and fusing a rotating layer (3) charged with a powder of silicon dioxide, impurity elements are controlled so that copper, chromium, and nickel each amount to 0.5 ppb or less, iron amounts to 120 ppb or less,...	06/09/1998
5707413	Method and apparatus for blow and blow production of hollow glass article The method and apparatus for producing a hollow glass article permit removal of a resulting hollow glass article without severing a moll. By this, glass powder which would otherwise be caused and fallen into the hollow glass article during severing the mo...	01/13/1998
5460638	Method for vacuum forming dishes from a ribbon A method and apparatus for producing a glass ware, such as a bowl or plate, via vacuum forming. A deformable glass ribbon is passed through a pair of parallel rolls or rollers, one of the rollers having a recessed cavity thereon for forming a thicker prod...	10/24/1995
5078769	Method and apparatus for pressing hollow blanks from glass Hollow blanks of glass are pressed between a hollow mold and a plunger (10). The mold comprises an inner wall complementary to the outer side of a blank. The plunger (10) comprises an open-pore plunger head (11) having a surface (24) complementary to the ...	01/07/1992
4798617	Method of forming a parison in the manufacture of hollow articles of glassware A method for forming parisons in the manufacture of hollow articles of glassware. The method comprising forming each parison by introducing a gob of molten glass into a mould cavity (10) having the shape desired for the external surface of the parison, an...	01/17/1989
4729779	Method and apparatus for manufacturing glass articles According to the invention, a cryogenic liquid as liquid oxygen is vaporized in a heat exchanger by air, which air is thus cooled and further used to blow bottles or the like manufactured at the end of the line where glass is melted and refined by burners...	03/08/1988
4723976	Method and apparatus for pressing glass cathode ray tube faceplates A method and apparatus for pressing glass TV tube faceplates employing a microprocessor controlled ram and plunger operated with open loop position based speed control at relatively high rates of motion when the plunger is not in critical contact with the...	02/09/1988
4708730	Apparatus for blow molding glass articles An apparatus for blow molding glass articles uses a mixture of cryogenic fluid and ambient air as a blowing fluid. The apparatus includes gas inlet means positioned to direct a flow of blowing fluid into the center of a blow mold, insulated manifold means...	11/24/1987
4682996	Parison formation in the manufacture of hollow articles of glassware A method and plunger arrangement for forming parisons in the manufacture of hollow articles of glassware. The method comprising forming each parison by introducing a gob of molten glass into a mould cavity (10) having the shape desired for the external su...	07/28/1987
4678492	Blowing process for expanding a molten glass parison A molten glass parison is expanded to the shape of a mould cavity (16) to thereby form the parison into an article of glassware (A). Air is supplied under pressure to the interior of the parison so that an elevated pressure is created in the parison causi...	07/07/1987
4652292	Methods for forming glass articles Methods for forming glass articles such as bottles and the like utilize pressurized flows of a cold blowing gas that is delivered from an insulated manifold into mold cavitites which are being used to mold glass articles. The cold blowing gas is a mixture...	03/24/1987
4571252	Lamp glass envelope and method for manufacture a lamp glass envelope A method for producing the type lamp glass envelope used in a reflector lamp is disclosed which employs a ribbon machine. Said ribbon formed lamp glass envelope includes a cylindrical neck portion terminating at one end in a curved reflector portion close...	02/18/1986
4553999	Methods and apparatus for blow molding glass articles Methods and apparatus for forming glass articles such as bottles and the like utilize flows of pressurized cold cryogen vapor that are introduced into mold cavities which are being used to mold glass articles. The cold cryogen vapor hastens cooling and so...	11/19/1985
4526602	Equipment and method for manufacturing thin glass flakes A blow-pipe 1 with an upper end 2 shaped to retain a working amount of molten glass is vertically movable from beneath the surface of molten glass 9 in a furnace to an upper position within orifice 10a of cover plate 10 and just below a cylindrical guide ...	07/02/1985
4518409	Method of and apparatus for making a parison A parison is molded from a gob of molten glass by first increasing the volume of the interior of a cup-shaped main mold body by an extra volume. Then the molten-glass gob is inserted through an upper opening into the interior of the main mold body. A neck...	05/21/1985
4411681	Method and apparatus for manufacturing glass bottles A method and apparatus for manufacturing glass bottles and more specifically an apparatus and a method for forming parisons is disclosed. At least one blank mold defines a mold cavity having an opening at its upper end for receiving a premeasured gob of m...	10/25/1983
4293327	Method for manufacturing glass bottles A method for manufacturing glass bottles is disclosed which includes consecutively delivering gobs of molten glass into a blank mold, forming each gob into a parison, transferring the parisons alternately into at least two sets of blow molds, allowing sai...	10/06/1981
4276073	Method of forming glass bottles A method of forming glass bottles from a short parison is disclosed, which method includes the steps of mechanically elongating the parison in a blow mold to an extent that the exterior bottom of the elongated parison is near, but not at, the bottom of th...	06/30/1981
4203749	Method of pressing and pressing machine for hollow glassware An improved pressing machine for hollow glassware comprising advancing means for advancing molds through a series of advance steps for molding one range of size of articles and for advancing the molds through advance steps of other distances for molding a...	05/20/1980
4200447	Process for the production of large glass containers A process and apparatus for the manufacture of large glass containers, comprises preparing a glass gob of a predetermined weight in an automatic mechanical feeder and feeding it to a first preparatory mold at a predetermined frequency. A parison is formed...	04/29/1980
4154591	Fabrication of optical fibers with improved cross sectional circularity Optical fibers are produced with improved cross sectional circularity. In the course of the fabrication process, the tubular preform from which the fibers are drawn, is collapsed under positive internal pressure. This removes most cross sectional noncircu...	05/15/1979
4094656	Method for forming glass containers Method for forming glass containers by the blow and blow process in which a parison mold having a plurality of cavities is centrally positioned relative to a pair of blow molds having a plurality of cavities. The parisons are formed with their necks down ...	06/13/1978
4066428	Method of applying vacuum while constricting the neck portion Molding of hollow glass articles wherein a gob flows from a feeder into a mold and forms a hollow tube as it enters the mold, and a pressure differential is applied across the tube so that the tube is shaped in the mold to form the hollow article. During ...	01/03/1978
4013437	Method for forming glass bottles An improved method is disclosed for forming glass bottles by the blow and blow process. A parison mold having a one-piece annular blank mold section and split neck and shoulder mold sections is charged fully with molten glass. Air is subsequently blown th...	03/22/1977
3967947	Method of making a hollow glass article Molding of hollow glass articles wherein a gob flows from a feeder into a mold and forms a hollow tube as it enters the mold, and a pressure differential is applied across the tube so that the tube is shaped in the mold to form the hollow article. During ...	07/06/1976
3953187	Control system for hydraulic rams A control system for operating the ram vertically movable in and out of a glass mold. The control system for operating the ram includes a hydraulic pump, a hydraulic fluid reservoir, and a hydraulic cylinder which is interconnected to the pump and to the ...	04/27/1976
3930819	Press molded hot glassware handling apparatus In a conjunction with a glassware press-molding machine, an arrangement of Bernoulli nozzles is employed to remove the articles from the mold, complete the forming of the articles, cool them, heat treat them and transfer them to a conveyor. The cooling an...	01/06/1976

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Class 65/81 - By differential gas pressure