| 摘要 |
<p>The cartridge assembly for dispensing at least one component comprises a cartridge having a rigid cartridge cylinder (16), a package assembly (1) having a membrane (3) containing liquid chemical (2), the membrane having a closed inlet end (12) and an outlet end (8) and a piston assembly (10) disposed in said cartridge assembly. The piston side end (27) of the inner wall (16A) of the cartridge cylinder and the front (9) of said piston assembly are formed thus that the membrane (3) is turned "outside in" within itself by the action of the piston provided with a sealing lip (11) such that the inner surfaces of the turned "outside in" wall portions (3A, 3B) of the membrane are sliding relative to each other during emptying of the package, sealing the gap betweeen the double walls (3A, 3B). Such a device requires considerably less dispensing force which is important particularly for a hand driven apparatus, and allows an efficient sealing of the liquid while dispensing. <IMAGE></p> |
