Vacuum sizing apparatus with controlled vacuum

Details Vacuum sizing apparatus with controlled vacuum Vacuum sizing apparatus with controlled vacuum

B - Operations, Transporting

29

C

B29C 47/90 (2006.01)

Patent

CA 2123197

TITLE: Vacuum Sizing Apparatus With Controlled Vacuum ABSTRACT: A vacuum sizing apparatus with a controlled vacuum is provided. The vacuum is precisely controlled by the use of a variable speed motor driven vacuum pump and a step motor controlled vent valve. An electrical circuit containing a mirco-processor coordinates the speed of the motor driven vacuum pump with the position of the vent valve to give precise vacuum control within the vacuum chambers of the sizing apparatus. A closed sump tank contains water for the water system of the apparatus and is maintained at the same vacuum level as the vacuum chambers within the sizing apparatus.

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