US 5,252,115 AGranted

Device and forming finger for forming a mouth area on a glass vial

AssigneeSchott Glaswerke

InventorsReinhard Mannl, Alfons Wolfrum, Franz Neumeier

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Abstract

A device and forming finger for forming a mouth area on a glass vial and a process for forming the glass vial wherein wear of the finger is reduced to a minimum so that better production tolerances for the formed mouth is possible. This is achieved by a forming finger being allocated either to each glass tube of a vial machine, or by providing play to the forming finger, or by providing the forming finger with lateral recesses. Preferably, the forming finger has a ratio of cross-sectional surface to circular segment area of the forming finger which is larger than or equal to 0.55.times.r. The aforedescribed forming fingers are used in all vial machines, in which from many glass tubes in a cycle, step by step vials are produced by rolling and melting the tube pieces.

Claims15

Dependent claims

A device for forming a mouth area of an open, heat-softened end of a glass tube having a longitudinal axis while the glass tube rotates about the longitudinal axis, the device comprising:

a rotatable carousel having means for mounting and rotating the glass tube about the longitudinal axis (LA) thereof;
a carriage mounted on said carousel for radial movement with respect to the longitudinal axis of the glass tube mounted on the carousel, and a forming finger mounted on said carriage for axial movement with respect to the longitudinal axis of the tube for supporting the heat-softened end of the glass tube mounted on the carousel, and
a forming roller for station located adjacent the carousel including a forming rolling the exterior surface of the end of the glass tube while the interior surface of the end of the glass tube is supported by the forming finger bearing there against in alignment with the forming roller opposite an area of the mouth engaged by the forming roller.

Dependencies are inferred from the claim text.