| 摘要 |
An apparatus for heating an elongated glass body, which, for example, may be used as a pre-form for the drawing of glass fibers, includes a rotatable first chuck wherein the first end of the elongated glass body may be rotatably secured. In addition the apparatus includes a second rotatable chuck whereat the second end of the elongated glass body is introduced into a quartz tube and this quartz tube is clamped into the rotatable second chuck. A burner, which is adapted to slide parallel to the longitudinal axis of the elongated glass tube, heats the elongated glass body in such a manner, that a so called fire polish of the elongated glass body for the improvement of its surface quality occurs. A method for heating the elongated glass body is also disclosed. The method includes the steps of clamping the first end of the elongated glass body in a first rotatable chuck, introducing the second end of the elongated glass body into the quartz tube which is secured in the second rotatable chuck, rotating the elongated glass body around the longitudinal access thereof, and heating the elongated glass body with a burner which slides at least parallel to the axis of the elongated glass body.
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