Dispensing cartridge with stepped chamber

A - Human Necessities – 61 – C

Patent

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Details

A61C 5/06 (2006.01) B05C 17/005 (2006.01) B05C 17/01 (2006.01) B65D 83/00 (2006.01)

Patent

CA 2360681

A dispensing cartridge for use with a hand-held applicator has a chamber with a first section and a second section. The second section has a smaller cross- sectional area than the first section such that the chamber has a stepped configuration. A piston is slidably received in the chamber and has a head portion that is received in the second section and a tail portion that is received in the first section. As a force is applied to the tail portion, the head portion advances to expel material through an outlet opening. The cartridge is especially useful for dispensing compositions having a relatively high viscosity such as dental pastes and the like.

L'invention concerne une cartouche de distribution à utiliser avec un applicateur à main, comprenant une chambre constituée d'une première et d'une deuxième partie. La section de la deuxième partie est inférieure à celle de la première partie, si bien que la chambre présente une configuration étagée. Un piston logé coulissant dans la chambre présente une partie de tête qui se trouve dans la deuxième partie et une partie de queue qui se trouve dans la première partie de ladite chambre. Lorsqu'une force est appliquée sur la partie de queue, la partie de tête avance de manière à expulser de la matière par une ouverture de sortie. La cartouche est particulièrement utile pour la distribution de compositions présentant une viscosité relativement élevée, telles que les pâtes dentaires et similaire.

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