Leak testing of plastic beaker with welded on lid - measuring upward lid curvature when external pressure is reduced on e.g. dairy product containers

摘要

The beaker is exposed to an external reduced press. The degree of upward curvature of the lid resulting from the overpress. in the beaker relative to the reduced press. is measured as a criterian for the sealing of the beaker. The lid curvature is measured electronically and evaluated by computer. The beaker is selected from a collection region of a filling system before being covered by a reduced press. bell. USE/ADVANTAGE - Esp. for use in systems for filling plastic beakers with preserves, dairy products etc. Enables sealing of such containers to be achieved and faulty ones to be storted out without essentially impeding continuous production.