Method for supplying a molding device with polymerizable mixture
AssigneeEssilor International
InventorsHervé Gentils, Eric Veque
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for supplying a polymerizable mixture to at least one molding device, said method comprising the following steps: a) providing a tank containing the polymerizable mixture (box E1), b) reaching a set value of pressure (Ps) in the tank, smaller than the ambient pressure (box E2), c) continuously maintaining the pressure (P) in the tank at the set value of pressure while supplying the polymerizable mixture to the molding device (boxes E3, E4, E41, E42, E5, E51). The invention also relates to a supply device for supplying the molding device with polymerizable mixture.
Claims7
A method for supplying a polymerizable mixture to at least one molding device, said method comprising the following steps:
- a) providing a tank containing the polymerizable mixture;
- b) reaching a set value of pressure in the tank, smaller than an ambient pressure;
- and
- c) continuously maintaining the pressure in the tank at the set value of pressure, by means of a vacuum regulator connected to the tank, while supplying the polymerizable mixture to the molding device through a looping line, both ends of which are connected to the tank and which is connected to an inlet of said molding device in between said ends;
- wherein in step c), an entry of inert gas into the tank is controlled based on the pressure contained within the tank.
A method for supplying a polymerizable mixture to at least one molding device, said method comprising the following steps:
- a) providing a tank containing the polymerizable mixture;
- b) reaching a set value of pressure in the tank, smaller than an ambient pressure;
- and
- c) continuously maintaining the pressure in the tank at the set value of pressure while supplying the polymerizable mixture to the molding device through a looping line, both ends of which are connected to the tank and which is connected to an inlet of said molding device in between said ends;
- wherein in step c), an entry of inert gas into the tank is controlled based on the pressure contained within the tank,
- wherein, in step c), the pressure in the looping line, at the inlet of the molding device, is maintained at a value higher than the set value of pressure that is maintained in the tank, by means of a back pressure (40 in FIG. 1) regulator positioned downstream of the inlet of the molding device and upstream of the inlet of the tank.
Dependencies are inferred from the claim text.