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AssigneeSchott AG
InventorsJonas Zeitler, Patrick Braun, Christian Geihe, Carsten Hamann, Doris Moseler, Jan-Niklas Schmidt, Thomas Korb
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A method for the manufacture of a finished glass tube with closed ends and a ventilation hole includes: providing a glass tube with open ends including a first end and a second end; opening a ventilation hole in a wall of the glass tube near one of the ends of the glass tube; closing the first end of the glass tube; closing the second end of the glass tube; and introducing a gas into the glass tube through the ventilation hole with a radial gas supply during at least one of the closings of the first end or the second end of the glass tube.
A method for the manufacture of a finished glass tube with closed ends and a ventilation hole, the method comprising:
A closed glass tube, comprising two closed ends and at least one ventilation hole in a vicinity of one of the closed ends, enclosing an inner cavity having an inner wall, the glass tube consisting of chloride refined borosilicate glass and a surface of the inner wall of the glass tube is free of NaCl dendritic crystal structures.
An apparatus for processing glass tubes, the apparatus comprising:
Dependencies are inferred from the claim text.