Patent ID: 7644821

Claim:
A sealed unit for delivering a product in response to a rupturing pressure, comprising: a generally flat member; a shaped member opposed to the flat member, and pressed into selective engagement with the flat member; a pumping volume enclosed between the flat member and the opposed shaped member for generating the rupturing pressure in response to an externally applied force; a product volume enclosed between the flat member and the opposed shaped member for containing the product to be delivered; fluid communication between the pumping volume and the product volume permits the rupturing the product volume in response to the rupturing pressure from the pumping volume; a product contained in the product volume; a perimeter seal formed during the selective pressing engagement, and extending around the pumping volume and the product volume, which perimeter seal can withstand the rupturing pressure; a delivery port with a pull-away closure for delivering the product out of the product volume; a rupture site proximate the delivery port which ruptures outward under the rupturing pressure; and a rupture flap produced by the rupturing at the rupture site, and connected to the pull-away closure, permitting pulling away of the pull-away closure to open the delivery port for delivery of the product contained within the product volume.