Apparatus for forming a groove in a glass tube

Details Apparatus for forming a groove in a glass tube Apparatus for forming a groove in a glass tube

1991-02-15

1992-12-01

Bishop, Steven C.

Chucks or sockets

Radially reciprocating jaws

Wedge actuated

65279, B23B 3116

Patent

active

051674203

ABSTRACT:
Apparatus for forming a groove in a glass tube without contacting the glass tube in the groove region. The apparatus includes a pair of chucks for holding opposite ends of the glass tube. The chucks are coupled to a motor for rotating the glass tube about its longitudinal axis. The apparatus further includes one or more torches for noncontact heating of the groove region of the glass tube sufficiently to soften the glass tube in the groove region. The chucks which hold the glass tube are axially movable for stretching and then compressing the glass tube along its longitudinal axis, when the glass tube has been softened in the groove area. The chucks are rotated during heating, stretching and compressing of the glass tube.

REFERENCES:
patent: 1181844 (1916-05-01), Church
patent: 1219083 (1917-03-01), Church
patent: 1453318 (1923-05-01), Giddings
patent: 2033670 (1936-03-01), Auer
patent: 2430761 (1947-11-01), Duphily
patent: 2710194 (1955-06-01), Bailey
patent: 4000907 (1977-04-01), Pascor
patent: 4576528 (1986-03-01), Sollavni

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