Patent ID: 8897335
Filing Date: 2014-11-25
Classification: C03B

Abstract:
1. A furnace for dehydrating and sintering a porous glass preform, the furnace comprising: a core tube that passes through a center portion of a furnace body to accommodate therein the porous glass preform; a heater that is arranged around the core tube in the furnace body to heat the porous glass preform in the core tube; and a core tube weight dividing and bearing unit that is arranged at an outer periphery of the core tube to divide and bear a weight of the core tube in a longitudinal direction thereof, and the core tube weight dividing and bearing unit including a plurality of collars that are protruded at a predetermined interval in the longitudinal direction at the outer periphery of the core tube, a first weight receiving unit that supports the collars at the outer periphery of the core tube, and a second weight receiving unit that bears a weight of the first weight receiving unit.