Sealing plunger for cartridge

Details Sealing plunger for cartridge Sealing plunger for cartridge

B - Operations, Transporting

27

G

222/79

B27G 11/02 (2006.01)

Patent

CA 1051839

TITLE SEALING PLUNGER FOR CARTRIDGE ABSTRACT A cartridge plunger has a generally cup-shaped body molded of a relatively rigid resin material, and a seal material is joined to the body and molded of a substantially softer and more resilient resin material. The body has an annular wall closely spaced from the inner surface of the cartridge, and the seal material extends around the outside of the annular wall which presses the seal material tightly against the inner surface of the cartridge when the plunger is in the cartridge. The seal material can also extend rearwardly of the plunger body and around the rearward edge of the cartridge for an additional seal when the plunger is initially seated in the cartridge. The softness and conformability of the sealing material forms a better sealing engagement with the cartridge to protect the contents from moisture and air. -1-

276685

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