Apparatus for contacting a preform rod to cause the preform rod

Details Apparatus for contacting a preform rod to cause the preform rod Apparatus for contacting a preform rod to cause the preform rod

1991-06-04

1992-06-02

Schor, Kenneth M.

Glass manufacturing

Processes

With shaping of particulate material and subsequent fusing...

65 1, 65 12, 65 29, 65160, 65271, 65279, C03B 37012, C03B 3707

Patent

active

051183331

ABSTRACT:
In order to provide a substrate such as an optical preform rod (24) which is suitable for insertion into a tube and which has a transverse cross section that is substantially circular and disposed concentrically about a longitudinal axis of the substrate substantially along its entire length, a force-applying means such as a graphite roller (52) is adapted to be moved incrementally toward an axis of rotation (35) about which the preform rod is turned rototably. Movement is discontinued when there is an indication that the force-applying means has been in continuous engagement with the preform rod for at least a predetermined portion of the periphery of the rod. In a preferred embodiment, the engagement of the force-applying means and the preform rod is discontinued after a predetermined time, whereafter the force-applying means again is moved toward the axis of rotation. Cycles of engagement and disengagement are continued as relative motion is caused between the force-applying means and the preform rod in a direction along the axis of rotation.

REFERENCES:
patent: 1756293 (1930-04-01), Kremnec
patent: 2735230 (1956-02-01), Morrill, Jr.
patent: 3773490 (1979-11-01), Inns
patent: 3897233 (1975-07-01), Szilaghi
patent: 4165222 (1979-08-01), DePanafieu et al.
patent: 4194807 (1980-03-01), Gliemeroth
patent: 4249924 (1981-02-01), DePanafieu et al.
patent: 4345930 (1982-08-01), Basola
patent: 4447273 (1984-10-01), Lynch et al.
patent: 4486214 (1984-12-01), Lynch et al.
patent: 4820322 (1989-04-01), Baumgart et al.

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