Crystal holder

Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Including specific material of construction

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Details

269 49, 156617SP, 156DIG98, 1566171, B01D 900

Patent

active

047388323

ABSTRACT:
A crystal holder for apparatus for pulling a crystal from a melt in a crucible with a reelable pulling member fastened to the crystal holder has thermal insulation between the fastener for the reelable pulling member and a clamping device for the crystal. The thermal insulation preferably comprises a tie rod between sections of the crystal holder, the tie rod having a cross section sufficiently smaller than the sections for insulation therebetween, an insulating spacer about the tie rod, and radiation shields about the spacer, the radiation shields having diameters no longer than the sections of the crystal holder. Foil insulation spaced about the crystal holder at the crystal clamp may also be provided. The insulation appreciably extends the life of the pulling member.

REFERENCES:
patent: 3511609 (1970-05-01), Kato
patent: 3511610 (1970-05-01), Dohmen
patent: 4367199 (1983-01-01), Jericho
patent: 4371502 (1983-02-01), Sibley et al.
patent: 4600564 (1986-07-01), Lissalde et al.
patent: 4613486 (1986-09-01), Tatsumi et al.
patent: 4663128 (1987-05-01), Hegeland

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