Glass manufacturing – Processes – Reshaping or surface deformation of glass preform
Patent
1995-12-12
1996-11-12
Warden, Jill
Glass manufacturing
Processes
Reshaping or surface deformation of glass preform
65102, 65110, C03B 2304
Patent
active
055735673
ABSTRACT:
The method for manufacturing a sample tube for the use in a nuclear magnetic resonance apparatus comprising the steps of: inserting a core bar into a tubular body made of glass or quartz, the core bar having a stepped portion and a remaining portion, the portion of the core bar with the stepped portion corresponding to a sample receiving chamber being larger in diameter than the remaining portion; gradually inserting the tubular body into an electric furnace for heating while allowing suction from a vacuum pump to act on the interior of the tubular body, thereby the whole tubular body being intimately attached for shaping to and along an outer peripheral surface of the core bar; withdrawing the core bar outside from a lower end opening of the tubular body; sealing by heating the lower end opening of the tubular body to form a bottom of the tube; and grinding the peripheral surface so that the whole tubular body will be equal in outer diameter.
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Wilmad Resonance Report, NMR 009, 3 pages.
Pyon Harold Y.
Shigemi Co. Ltd.
Warden Jill
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