Method for thermoforming plastic pots and apparatus therefor

摘要

Thermoforming jars from a plastic sheet uses dies sliding in a counter mould and stamps in a mould. The sheet is held in a module and pre-heated and stretched by introducing heating irons into openings in the module. Subsequently the mould is closed and the sheet is thermoformed An Independent claim is included for the following: (a) Apparatus for performing as above where the number of bores in the counter-mould and the number of openings in the module each correspond to the number of stamps. Preferred Features: The sheet contains preforms of the jars. The counter mould contacts the module before the mould contacts the module. Thermoforming commences before the counter-mould is placed against the module