FIELD: apparatus for applying liquids or other fluent materials to surfaces, particularly ejection devices for cartridges having concentric chambers closed with pistons.
SUBSTANCE: ejection device has threaded pushing shaft moving along an axis by screwing thereof in end member arranged at rear cartridge end and provided with internal thread. The pushing shaft has inner die applying force to inner chamber piston and outer die concentrically installed in respect to inner piston, and pressing down on annular piston of outer chamber. The outer die has thread formed on outer side surface thereof and extending the full length thereof. Treaded end member is made as threaded ring. The pushing shaft is injection-molded as an integral part.
EFFECT: decreased cost and increased reliability, as well as simplified manufacture and simplified usage.
7 cl, 3 dwg
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