Dispensing cartridge with vented piston

Details Dispensing cartridge with vented piston Dispensing cartridge with vented piston

2005-09-09

2009-11-24

Nicolas, Frederick C. (Department: 3754)

Dispensing

With discharge assistant

Container with follower

C222S326000, C222S386000

Reexamination Certificate

active

07621428

ABSTRACT:
A dispensing cartridge with a vented piston is disclosed. The piston includes a piston shell and a bleed plug. The arrangement of the piston shell and the bleed plug allows air to be vented through the piston until all of the air is vented out of the dispensing cartridge. With the air vented out of the dispensing cartridge, the piston self-actuates into a closed sealed position in which the bleed plug forms a seal with the piston shell to prevent further fluid from flowing between the two elements.

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Jelercic, D., European Search Report, Jul. 4, 2006, 8 pages.

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