| 摘要 |
<p>The present invention relates to a system for dispensing semi-liquid materials simultaneously and in a predetermined ratio while preventing hazardous leakage to the environment. The present invention overcomes the disadvantages of conventional devices by providing a system which includes two cartridges (14, 16) having the same or selected different diameters, the cartridges being rigidly snapped together by interfitting male and female elements (60, 62, 68, 70, 72, 74). A seal (38) is also provided for each of the cartridges which includes a resilient wiping lip (48) formed around the outer periphery of the seal. Venting grooves are also provided in the inner wall of the cartridge so that air may readily be expelled from the cartridge as the seal is inserted.</p> |
