Patent ID: 7958747

Claim:
A method of manufacture of a glass vessel, the glass vessel comprising a flask ( 6 ) and an integrated stem, comprising the steps of: introducing a dose of molten glass into a parison mould ( 1 ), in which a cake ( 7 ) is formed having a rough pressing ( 71 ) of a stem parison ( 61 ) projecting from its bottom, placing the cake ( 7 ) on a rotating ring ( 8 ) arranged above a glass-blowing mould ( 5 ) having a vertically movable bottom mould ( 4 ), the rotating ring ( 8 ) arranged to rotate in a given direction around an axis of rotation, the movable bottom mould having a cavity ( 41 ) and arranged to rotate in the same direction as the rotating ring ( 8 ), the axis of rotation of the rotating ring ( 8 ) laying in straight line with a longitudinal axis of the glass-blowing mould ( 5 ), clamping a periphery of the cake ( 7 ) against the rotating ring ( 8 ) by a holder ( 10 ) of a blowing apparatus ( 9 ), wherein the cake ( 7 ) streams off spontaneously by gravity through the rotating ring ( 8 ) and changes shape into a shape of the flask ( 6 ), shifting out the bottom mould ( 4 ) into an area of the glass-blowing mould ( 5 ), in an open configuration, close under the rotating ring ( 8 ), the rough pressing ( 71 ) fitting into the cavity ( 41 ) of the bottom mould ( 4 ), fastening the rough pressing ( 71 ) in the cavity ( 41 ) of the bottom mould ( 4 ) by underpressure, blasting air into the flask ( 6 ) by said blowing apparatus ( 9 ) and, at the same time, forcing the bottom mould ( 4 ) downwards until an orifice ( 42 ) of the cavity ( 41 ) of the bottom mould ( 4 ) reaches a level of an inner rotary surface ( 51 ) of a bottom opening of the glass-blowing mould ( 5 ), closing the glass-blowing mould ( 5 ) and blasting air into the flask ( 6 ) until the flask ( 6 ) takes the form of an inner wall ( 52 ) of the glass-blowing mould ( 5 ), cooling down the flask in the glass-blowing mould ( 5 ) into a solid state and, simultaneously, by action of both gravity and underpressure, finishing a final shape of the stem parison ( 61 ) to form the integrated stem in the cavity ( 41 ) of the bottom mould ( 4 ) integrated with the flask ( 6 ), which stem is subsequently cooled down into a solid state, releasing the underpressure in the cavity ( 41 ) of the bottom mould ( 4 ) and shifting the bottom mould ( 4 ) downwards, and opening the glass-blowing mould ( 5 ) and therefore releasing the flask ( 6 ) with the integrated stem.