초록 ▼

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 h

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.

대표청구항 ▼

[ What is claimed is:] [1.] A dispensing cartridge for releasable connection to a hand-held applicator comprising:a body having an open end for receiving a plunger of an applicator, the body also including an outlet opening and an elongated chamber extending between the open end and the outlet openi

[ What is claimed is:] [1.] A dispensing cartridge for releasable connection to a hand-held applicator comprising:a body having an open end for receiving a plunger of an applicator, the body also including an outlet opening and an elongated chamber extending between the open end and the outlet opening, the chamber having a first section adjacent the open end and a second section adjacent the outlet opening, wherein the first section has a certain generally constant cross-sectional area transverse to the longitudinal axis of the chamber as the outlet opening is approached, and wherein the second section has a certain generally constant cross-sectional area transverse to the longitudinal axis of the chamber as the outlet opening is approached that is less than the certain generally constant cross-sectional area of the first section; andan elongated piston slidably received in the chamber, the piston having a head portion and a tail portion, wherein the tail portion has a rear face for contact with the plunger of the applicator, wherein the tail portion including the rear face is received in the first section and wherein the head portion is received in the second section.