Process for manufacturing a glass container
AssigneeL'oreal
InventorGhislaine Monchatre
Life of this patent
Estimating the term…
Abstract
A process for the formation of a container of glass, includes a first molding step performed in a preforming mold having pins projecting into the mold over a length less than the thickness of the walls of the preform of the article, the external walls of the preform presenting after removal from the mold recessed portions corresponding to the presence of the projecting pins. A second step is performed in a smooth-walled finishing mold having the shape and the dimensions of the container to be made, the blowing pressure in the interior of the finishing mold being controlled so as to permit a smoothness of the external wall of the container and the formation of air inclusions in the wall of the container.
Claims11
A process for forming a glass container, comprising:
- a first forming step of forming a preform in a preforming mold having pins projected from an internal surface of the preforming mold, such that an external surface of a wall of the preform has recessed portions;
- a step of retracting the pins into the preforming mold and removing the preform from the preforming mold;
- and
- a second forming step of forming the container in a smooth walled finishing mold by raising a gas pressure within the finishing mold so as to smooth the external surface of the wall of the container and transform the recessed portions into air inclusions in the wall of the container.
A process for forming a glass container, comprising:
- a first forming step of forming a preform in a preforming mold such that an external surface of a wall of the preform has recessed portions;
- a second forming step of forming the container in a smooth walled finishing mold by raising a gas pressure within the finishing mold so as to smooth the external surface of the wall of the container and transform the recessed portions into air inclusions in the wall of the container;
- and
- a step, performed before said second forming step, of immersing the preform in a bath of molten glass so as to coat the external surface of the wall of the preform with a fine layer of glass, the fine glass layer not substantially modifying a profile of the external wall.
A process for forming a glass container, comprising:
- a first forming step of forming a preform in a preforming mold such that an external surface of a wall of the preform has recessed portions;
- a second forming step of forming the container in a smooth walled finishing mold by raising a gas pressure within the finishing mold so as to smooth the external surface of the wall of the container and transform the recessed portions into air inclusions in the wall of the container;
- and
- further step of immersing the container in a bath of molten glass before the second forming step, wherein the second forming step is performed using a gas pressure controlled so as not to burst the air inclusions.
Dependencies are inferred from the claim text.