Crystal pulling unit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 15, 2001
Grant Date -
N/A
app pub date -
Mar 22, 1999
filing date -
Mar 26, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A crystal pulling unit for the production of a crystal block has a recharging tube (7), via which granulate (17) is introduced into a crucible (2) with a melt (3), located inside a container (1). A fine-dust separator (8) is located in the recharging tube (7) outside the container (1); the separator works like an air classifier and, by means of a protective gas cushion, removes fine dusts from the granulate (17). This counters the danger of clogging of the recharging tube (7) by the caking of the recharging material.
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