Patent ID: 6413334
Filing Date: 2002-07-02
Classification: B29C,B29L,B30B,B65B

Abstract:
A method for the thermal bonding of a base part (3) of a packaging for contact lenses with a cover film (F), in which method the contact surface of the base part (3) facing the cover film and the corresponding contact surface of the cover film (F) facing the base part each comprise a plastics and, during the thermal bonding, are mechanically pressed against one another along a join, and while the mechanical pressure is being generated along the join heat is simultaneously caused to act on the join, so that the contact surfaces of base part and cover film are thermally bonded along the join, wherein for the purpose of generating the mechanical pressure and causing heat to act on the join there is used a contact plate (70) of low heat capacity which, during the thermal bonding, is pressed against the surface of the cover film remote from the contact surface; the temperature of the contact plate (70) is measured in the immediate vicinity of the cover film (F); and in the event of the measured temperature deviating from a predetermined tolerance range around a desired temperature, the temperature of the contact plate (70) is within a very short time adjusted so that it again lies within the predetermined tolerance range around the desired temperature.