Abstract: In a plunger assembly for forming ribbons of molten glass, at least one extruder plunger is guided in a vertical direction from and towards a tank adapted to contain a mass of molten glass from a guide head carried by a support arm kept fixed during the forming of the bead. The extruder plunger is displaced by alternated cyclic motion with respect to the support arm according a predefined law of motion from one drive unit displaced above the support arm and at least partly above the tank.

Abstract: In a plunger assembly for forming ribbons of molten glass, at least one extruder plunger is guided in a vertical direction from and towards a tank adapted to contain a mass of molten glass from a guide head carried by a support arm kept fixed during the forming of the bead extruder plunger displaced by alternated cyclic motion with respect to the support arm according a predefined law of motion from one drive unit displaced above the support arm and at least partly above tank.

Abstract: A cutting assembly is provided with a supporting frame, with two shear cutting members revolving with respect to the supporting frame about respective hinge axes, parallel to each other, and with a movement device for rotating the shear cutting members with a reciprocating rotary motion, with equal angles and in opposite directions; the shear cutting members rotate between a retracted rest position and an advanced cutting position to form a glass gob from at least one thread of molten glass; the movement device is provided with a connecting rod and crank transmission, a rotary motor with a rotor, which drives such transmission, and with a control unit, which controls the rotary motor and is configured so as to rotate the rotor in opposite directions between two stroke-end angular positions, corresponding to the retracted rest position of the shear cutting members.

Abstract: The control system is defined by at least one subsystem for controlling electric motors, and by a subsystem for controlling pneumatic article molding movements, each subsystems including a central unit, a plurality of peripheral units, and a second-level serial bus interposed between the respective central unit and respective peripheral units. A first-level serial bus is connected between the two central units; the peripheral units are intelligent types; and the first-level bus and second-level buses are “fieldbuses” in CANbus technology and employ a CANopen protocol.