Patent ID: 8215481
Filing Date: 2012-07-10
Classification: B65D,Y10S

Abstract:
1. A container closure for retaining an additive material to mix with a container material within a container, comprising: a base for sealing with an opening in the container; a first and a second lock; a reservoir comprising a sleeve and a plunger for retaining the additive material; said sleeve being formed with said base and extending between a first end and a second end as a one-piece unit; a resilient seal located in proximity to said first end of said sleeve; said resilient seal comprising a resilient chevron seal extending between a proximal end and a distal end with said proximal end of said chevron seal being integrally formed with said sleeve; said resilient chevron seal tapering from said proximal end to said distal end for increasing the resiliency of said resilient seal; a frangible wall located in proximity to said second end of said sleeve; said plunger extending between a first end and a second end; an end wall located in proximity to said first end of said plunger; a projection located on said second end of said plunger; said plunger slidably received within said sleeve with said resilient seal interacting between said sleeve and said plunger; a severable member integrally formed with said plunger for coacting between said base and said plunger to locate said plunger in an extended position for spacing said projection from said frangible wall and for inhibiting depression of said plunger; said first lock preventing removal of said plunger from said extended position; said severable member being removable for enabling said plunger to be slid into a depressed position to fracture said frangible wall with said projection to permit the additive material to enter the container; and said second lock preventing removal of said plunger from said depressed position.