Two compartment container for mixing

Claim 1

A container for packing two compositions which must be separately kept until being mixed together shortly before use, the container consisting of two separate chambers arranged one upon the other and movable toward and away from one another, the upper chamber having a closeable orifice for delivery of the container contents, means sealing the upper and lower chambers including one seal for the upper chamber and another seal for the lower chamber, and an intermediate part arranged between the two chamber and the respective seals, the intermediate part having means for cutting the sealing means of the upper and lower chambers when the chambers are moved toward one another to thereby allow mixing of two compositions being separately kept, one composition in each of the two chambers, the means for cutting the sealing means including upper and lower cutting rings on the intermediate part, and the upper chamber having internal threads and the lower chamber including cooperating external threads whereby the chambers move toward one another by being screwed together to thereby urge the upper cutting ring into the seal on the upper chamber and the lower cutting ring into the seal on the lower chamber.