Inflatable membrane apparatus and process for transferring a coating onto a surface of a lens blank

摘要

The inflatable membrane apparatus (10) comprises : a fluid accumulator (11) having an upper and a lower face and a fluid entrance (12), said lower face being partly formed by an inflatable membrane (14), and a trunconical part (15) projecting outwardly from the lower face of the accumulator whose greater base is closed by at least part of the inflatable membrane (14) and smaller base forms a circular opening, whereby, when pressurized fluid is introduced into the accumulator (11), deformation of the inflatable membrane (14) is guided by the trunconical part.