Patent ID: 7047766

Claim:
An invert mechanism for a glass forming machine for pre-forming and finishing forming parisons held in a neck mold, said glass forming machine including a frame box having a cover plate mounted thereon, and a parison pre-forming station and a parison finishing forming station, said invert mechanism comprising: an invert shaft rotatably mounted on said glass forming machine above said cover plate and positioned between said pre-forming and finishing forming stations; a neck mold holder mounted on said invert shaft and movable between said pre-forming and finishing forming stations upon rotation of said invert shaft, said neck mold holder comprising holder halves movable along said invert shaft toward and away from one another for engaging and releasing said neck mold; an electric motor mounted on said glass forming machine and having a drive shaft with a longitudinal axis positioned above said cover plate; a transmission positioned between said electric motor and said invert shaft for transmitting torque from said drive shaft to said invert shaft for rotating said invert shaft between said pre-forming and finishing forming stations; a cam sleeve mounted coaxially on said invert shaft, said cam sleeve being rotatable relative to said invert shaft and fixed axially thereon; a pair of cam grooves extending axially and circumferentially in and along said cam sleeve, said cam grooves being symmetric to one another about a mid-plane intersecting said cam sleeve; and a pair of guide sleeves mounted coaxially on said cam sleeve adjacent to one another, said guide sleeves being rotationally fixed relatively to said invert shaft and axially movable there along, each said guide sleeve having a pin extending inwardly therefrom toward said cam sleeve, each said pin having a cam roller mounted thereon and engaging one of said cam grooves in said cam sleeve, each of said neck mold halves being mounted on a respective one of said guide sleeves for rotational motion between said pre-forming and finishing forming stations and for axial motion toward and away from one another for engaging and releasing said neck mold.