| 摘要 |
FIELD: packing means, particularly pliable tubular containers adapted to be permanently deformed to expel contents. ^ SUBSTANCE: distribution system 30 to disperse product from container provided with orifice comprises neck 38 communicating with container orifice. The neck defines at least one outlet orifice 46, distal sealing surface 54 located distally of the outlet orifice 46 and proximate sealing surface 56 formed on outer surface of the neck 38 proximally of the outlet orifice 46. Nozzle assembly 60, 70, 80 is installed in the neck 38 and may be displaced between retracted closed position and extended opened position. Nozzle assembly 60, 70, 80 includes nozzle 60 with outlet channel 86 arranged at least about part of neck 38, proximal sealing surface 90 brought into air-tight contact with proximal surface 56 of the neck and distal sealing surface 96 arranged from outer surface of proximal sealing surface 90 to provide air-tight contact thereof with distal sealing neck surface 54 when the nozzle assembly is in its retracted closed position. The nozzle assembly also has resiliently flexible valve located across outlet channel 86 for channel 86 closing distantly of the distant sealing neck surface 54. The valve has normally closed slot which opens in response to a pressure difference acting over the valve. ^ EFFECT: increased operational convenience. ^ 26 cl, 24 dwg |
