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1. (WO2003055814) METHOD FOR COLLAPSING A HOLLOW SUBSTRATE TUBE INTO A ROD-LIKE PREFORM WHILE HEATING

Pub. No.:    WO/2003/055814    International Application No.:    PCT/NL2002/000862
Publication Date: Jul 10, 2003 International Filing Date: Dec 20, 2002
IPC: C03B 37/012
C03B 37/018
Applicants: DRAKA FIBRE TECHNOLOGY B.V.
SIMONS, Dennis, Robert
MILICEVIC, Igor
Inventors: SIMONS, Dennis, Robert
MILICEVIC, Igor
Title: METHOD FOR COLLAPSING A HOLLOW SUBSTRATE TUBE INTO A ROD-LIKE PREFORM WHILE HEATING
Abstract:
The present invention relates to a method for collapsing a hollow substrate tube into a rod-like preform while heating by reciprocating a heating element along the length of the substrate tube. The present invention is characterized in that a constant electric power is supplied to the heating element during collapsing.