초록 ▼

A tap primarily intended for ‘bag-in-a-box’constructions including a plunger (80) which is in a barrel (52). A knob (68) is fast with the plunger (80) and is arranged so that it and the plunger perform a spiral movement when it is rotated. The tap includes a seat (66) with which a sealing portion (8

A tap primarily intended for ‘bag-in-a-box’constructions including a plunger (80) which is in a barrel (52). A knob (68) is fast with the plunger (80) and is arranged so that it and the plunger perform a spiral movement when it is rotated. The tap includes a seat (66) with which a sealing portion (86) of the plunger (80) co-operates. The inlet to the barrel is through one end thereof and there is an outlet port (64) in the wall thereof. The part of the plunger (80) outwardly of the sealing portion (86) constitutes a wiping edge which moves across the port (64) during opening and closing movement of the plunger (80). A piercing element (94) is provided which, the first time the tap is opened and closed, is forced through the hermetically sealed pouch (P). The tap is leak-proof, does not permit air to enter the pouch P in normal operation and, because of the wiping action provided, does not drip.

대표청구항 ▼

A tap comprising a cylindrical barrel and a cylindrical plunger which is movable along the barrel internally thereof, the barrel having an internal seat, a port in the wall thereof which port serves as an outlet from the barrel, and an inlet thereto, said inlet and port being on opposite sides of sa

A tap comprising a cylindrical barrel and a cylindrical plunger which is movable along the barrel internally thereof, the barrel having an internal seat, a port in the wall thereof which port serves as an outlet from the barrel, and an inlet thereto, said inlet and port being on opposite sides of said seat, and the plunger being displaceable along the barrel between a first position in which a sealing surface thereof is in engagement with said seat to close said inlet off from said port, and a position in which said sealing surface is spaced from said seat to permit flow from said inlet to said port, said plunger having an edge which, as the plunger is displaced between said positions, moves across said port from a position on one side of said port to a position on the other side of said port, a piercing element in said barrel for piercing a liquid containing pouch to open the pouch, a member forming part of said plunger and which initially protrudes into said piercing element, said piercing element having a part which is initially held in an inoperative position by said member and which moves to an operative position in the path of return movement of said member upon the plunger first being displaced to cause said sealing surface to move away from the seat.