Abstract: An apparatus for manufacturing a single crystal by growing a single crystal according to a Czochralski method, the apparatus including: main chamber configured to house crucible configured to accommodate raw-material melt, and heater configured to heat raw-material melt; pulling chamber continuously provided at upper portion of main chamber and configured to accommodate single crystal grown and pulled; cooling cylinder extending from at least ceiling portion of main chamber toward raw-material melt so as to surround single crystal being pulled, cooling cylinder configured to be forcibly cooled with coolant; and auxiliary cooling cylinder fitted in an inside of cooling cylinder. Auxiliary cooling cylinder is made of any one or more materials of graphite, carbon composite, stainless steel, molybdenum, and tungsten. The auxiliary cooling cylinder has structure covering bottom surface of cooling cylinder facing raw-material melt. Gap between auxiliary cooling cylinder and bottom surface of cooling cylinder is 1.

Abstract: An apparatus for manufacturing a single crystal according to a Czochralski method, including: a main chamber housing crucibles for a raw-material melt and heater for heating the raw-material melt; a pulling chamber at an upper portion of the main chamber and a single crystal pulled from the raw-material melt; a cooling cylinder extending from a ceiling portion of the main chamber toward a surface of the raw-material melt to surround the single crystal; an auxiliary cooling cylinder inside the cooling cylinder; and a diameter-enlargement member to fit into the auxiliary cooling cylinder. The auxiliary cooling cylinder has a slit penetrating in an axial direction to come into close contact with the cooling cylinder by pushing the diameter-enlargement member into the auxiliary cooling cylinder to enlarge the diameter of the auxiliary cooling cylinder. This enables efficient cooling of a growing single crystal and increases the growth rate of the single crystal.

Abstract: An apparatus for manufacturing a single crystal by growing a single crystal according to a Czochralski method, the apparatus including: main chamber configured to house crucible configured to accommodate raw-material melt, and heater configured to heat raw-material melt; pulling chamber continuously provided at upper portion of main chamber and configured to accommodate single crystal grown and pulled; cooling cylinder extending from at least ceiling portion of main chamber toward raw-material melt so as to surround single crystal being pulled, cooling cylinder configured to be forcibly cooled with coolant; and auxiliary cooling cylinder fitted in an inside of cooling cylinder. Auxiliary cooling cylinder is made of any one or more materials of graphite, carbon composite, stainless steel, molybdenum, and tungsten. The auxiliary cooling cylinder has structure covering bottom surface of cooling cylinder facing raw-material melt. Gap between auxiliary cooling cylinder and bottom surface of cooling cylinder is 1.

Abstract: An apparatus for manufacturing a single crystal according to a Czochralski method, including: a main chamber housing crucibles for a raw-material melt and heater for heating the raw-material melt; a pulling chamber at an upper portion of the main chamber and a single crystal pulled from the raw-material melt; a cooling cylinder extending from a ceiling portion of the main chamber toward a surface of the raw-material melt to surround the single crystal; an auxiliary cooling cylinder inside the cooling cylinder; and a diameter-enlargement member to fit into the auxiliary cooling cylinder. The auxiliary cooling cylinder has a slit penetrating in an axial direction to come into close contact with the cooling cylinder by pushing the diameter-enlargement member into the auxiliary cooling cylinder to enlarge the diameter of the auxiliary cooling cylinder. This enables efficient cooling of a growing single crystal and increases the growth rate of the single crystal.

Abstract: A conveyor apparatus for feeding a sheet material such as a sheet of glass in a heating furnace includes an array of feed rolls for feeding the sheet material in a feeding direction, the feed rolls having respective axes extending in a direction transverse to the feeding direction. A motor is disposed on a side of the array of feed rolls. An array of drive support rollers is disposed on the side of the array of feed rolls and operatively connected to the motor for rotation thereby. Each of the drive support rollers commonly supports adjacent two of the feed rolls for rotating the adjacent two feed rolls.

Abstract: There is disclosed an improved apparatus for locally heating selected portions of glass sheets conveyed through a tunnel type furnace on a roller conveyor. The apparatus comprises two localized heaters positioned within the furnace, supporting members for supporting the localized heaters, at least one portion of each of the supporting members extending into the furnace, and a drive mechanism positioned externally of the furnace and adapted to reciprocatingly moving the localized heaters in a direction transversely to the direction of conveyance of the glass sheets in a substantially synchronized relation to movement of the conveyed glass sheets so that the selected portions of the glass sheets are locally heated by the localized heaters and can thereafter be bent, at a bending station, to a much smaller radius of curvature than the rest of the glass sheet.