John J Serafino

US Patent:

43177999, Mar 2, 1982

Filed:

Mar 30, 1981

Appl. No.:

6/248819

Inventors:

John B. Serafino - Billerica MA
William A. Kmetz - Marlboro MA

Assignee:

Mobil Tyco Solar Energy Corporation - Waltham MA

International Classification:

C30B 3500

US Classification:

422249

Abstract:

A belt-roller crystal pulling mechanism is described. The belt-roller comprises a single driven belt having a vertical run, and a set of pivotally mounted follower rollers for urging the growing crystal in contact with the belt. The pivot mount enables bends or buckles in the crystal to go through the belt and rollers without causing wiggle at the growth interface which might otherwise cause the growing crystal to break free from the meniscus.