| 摘要 |
A container for fluid products having telescoping parts and operable by outside manual pressure is provided. A base cup open at the top receives a plunger cup that is slidable therein with product being filled in both cups. A slidable piston in the plunger cup dispenses product from the plunger cup concurrently with the dispensing of the same or different product by the plunger from the base cup. A dispensing nozzle is provided in one of the cups with a transfer tube connecting the nozzle to the other cup. The container assembly includes four injection molded plastic parts, namely, (1) the base cup, (2) the plunger cup, (3) the piston and (4) the cap and nozzle assembly; these parts snapping together during the combined filling and assembling process. Integral snap rings and snap beads are used to lock the parts together. Once assembled, the piston locks the plunger cup against either in or out telescoping movement to prevent accidental dispensing during shipping and handling. Additional break-off safety strip and heat shrink band at the juncture between the cups may be employed. In products requiring longer shelf life, the band may be required, as well as flip-up or rotary cutoff valves as disclosed. Check valves may be advantageously employed, especially for products of low viscosity. Different viscosity products are accommodated by sized passages and orifices, reducing inserts for the passages and/or multiple passages. The process provides filling the base cup, assembling the plunger cup and piston and combining with the base cup, filling the plunger cup and installing the cap and safety strip and seal band.
|
