Sealing piston for cartridges with de-aeration and barrier...

Details Sealing piston for cartridges with de-aeration and barrier... Sealing piston for cartridges with de-aeration and barrier...

2008-04-08

2008-04-08

Jacyna, J. Casimer (Department: 3754)

Dispensing

With discharge assistant

Container with follower

C222S325000, C222S137000

Reexamination Certificate

active

10932862

ABSTRACT:
A cylindrical cartridge for receiving a pasty material, having a sealing piston and a spreading piston insertable into the sealing piston which, sealing piston and spreading piston, when inserted into said cartridge, cooperate to vent air from and seal said cartridge.

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