Abstract: A method and system for coating a glass contacting surface with a thermal barrier and lubricious coating. The system uses a novel exterior surface mixing tip device wherein oxygen is supplied through a predetermined portion of one supply line, and a predetermined gas is supplied through a predetermined portion of another supply line enveloping the first predetermined portion.

Abstract: Method of heating glass contacting surfaces, comprising heating the glass contacting surfaces to a predetermined operating temperature by combustion of a hydrocarbon fuel gas mixture which includes 90% by volume of MAPP gas and 10 percent by volume of propane. Another method blends the MAPP with air and/or natural gas. A novel hydrocarbon fuel gas mixture which includes 90% by volume of MAPP gas and 10% by volume of propane.

Abstract: A method and system for coating a glass contacting surface with a thermal barrier and lubricious coating. The system uses a novel exterior surface mixing tip device wherein oxygen is supplied through a predetermined portion of one supply line, and a predetermined gas is supplied through a predetermined portion of another supply line enveloping the first predetermined portion.

Abstract: Method of heating glass contacting surfaces, comprising heating the glass contacting surfaces to a predetermined operating temperature by combustion of a hydrocarbon fuel gas mixture which includes 90% by volume of MAPP gas and 10 percent by volume of propane. Another method blends the MAPP with air and/or natural gas. A novel hydrocarbon fuel gas mixture which includes 90% by volume of MAPP gas and 10% by volume of propane.

Abstract: A method for lubricating glass contacting surfaces of glass forming equipment is disclosed. The method comprises the steps of delivering MAPD gas to a venturi at a low pressure, preferably below 10 p.s.i., and delivering oxygen to the venturi at a lower pressure, usually half or less than half of the pressure at which the MAPD gas is delivered to the venturi. The MAPD gas and the oxygen are mixed in the venturi and delivered to and through a nozzle which is directed toward a glass contacting surface. The mixture is ignited as it leaves the nozzle; its flow is controlled so that the temperature of the flame is between approximately 1500 and 1800 degrees K. By controlling the temperature of the flame, the method is operable to deposit on the glass contacting surface a lubricating coating of graphite including a substantial percentage of flat plate graphite.

Abstract: A method for lubricating glass contacting surfaces of glass forming equipment is disclosed. The method comprises the steps of delivering MAPD gas to a venturi at a low pressure, preferably below 10 p.s.i., and delivering oxygen to the venturi at a lower pressure, usually is half or less than half of the pressure at which the MAPD gas is delivered to the venturi. The MAPD gas and the oxygen are mixed in the venturi and delivered to and through a nozzle which is directed toward a glass contacting surface. The mixture is ignited as it leaves the nozzle; its flow is controlled so that the temperature of the flame is between approximately 1500 and 1800 degrees K. By controlling the temperature of the flame, the method is operable to deposit on the glass contacting surface a lubricating coating of graphite including a substantial percentage of flat plate graphite.

Abstract: An improvement in a method for producing a glass article is disclosed. The method includes the steps of lubricating the walls of a mold cavity by igniting a gas therein, introducing a gob into the mold cavity, and pressing the gob to a desired shape. The improvement involves the use, as the gas ignited in the mold cavity, of a mixture of a methyl acetylene/propadiene gas and a hydrocarbon gas having an acetylenic triple bond. The proportion of the hydrocarbon having an acetylenic triple bond is controlled to one at which the flame which results from igniting the gas mixture is capable of penetrating an air lock in a deep mold cavity. Usually, the hydrocarbon gas having an acetylenic triple bond has from two to six carbon atoms and constitutes from 1 percent by volume to 10 percent by volume of the gas mixture.

Abstract: Improvements in a method for producing a pressed glass article are disclosed. The method includes causing a gas to flow from a manifold around the exterior of a plunger used for pressing a gob of softened glass in a mold; the improvements include the use of a gas which is a cold mixture of at least one alkane and at least one unsaturated hydrocarbon, control of the proportion of alkane to unsaturated hydrocarbon so that a substantially invisible lubricious coating is deposited on the plunger, causing the gas to flow at a sufficiently high rate to cause excessive cooling, and controlling the temperature of the plunger by periodically interrupting the gas flow. The method of the invention provides cooling and lubrication of glass pressing apparatus with a single gas mixture, and helps to alleviate such problems as high expense, inadequate cooling and/or lubrication, pollution and excessive carbonaceous residue which can result from conventional methods.