| 摘要 |
<p>A dispenser comprises at least one reservoir chamber 3-5, 4-6 (Figs. 2, 6) for the pasty material to be added as a stripe, leading through outlets 7, 8 into a nozzle 1 and communicating with the principal paste under pressure at a point opposite the outlets 7, 8. The reservoir chambers 3-5, 4-6 are formed by the combination of a rigid cap 9 incorporating the nozzle 1, and a flexible dome 10 fitting over the end wall of the container 2 and incorporating the flaps 11, 12 of flap- type non-return valves which control movement of the principal paste into the reservoir chambers 3-5, 4-6 to force the added pasty material to the outlet 7, 8 simultaneously with the formation of the principal ribbon of paste. The seating 13, 14 (Fig. 5) of the valve is incorporated in the end wall 15 of the container 2. The flexible dome 10 encloses at the same time the base of the nozzle 1 to isolate it from the reservoir chambers 3-5, 4-6 whilst allowing the passage of the principal paste from an opening 16 in the end wall to the nozzle 1. <IMAGE></p> |
