Patent ID: 7938573

Claim:
A cartridge, comprising: layers of material stacked together such that each layer contacts at least one other layer, and a portion of each layer being immobilized relative to a portion of each one of the other layers, the layers including a base between a cover and a flexible layer; a mixing component defined by the layers, the mixing component including a plurality of variable volume reservoirs in liquid communication with one another and being configured to mix different solutions so as to generate a product solution, the mixing component including openings extending through the base, a side of the base having bonded regions where the side of the base is bonded to the flexible layer and unbonded regions where the side of the base is not bonded to the flexible layer, each of the openings in the base being surround by an unbonded region and each of the unbonded regions that surrounds an opening being surrounded by a bonded region, each variable volume reservoir being defined by a different one of the unbonded regions of the base and the flexible layer and having a volume that increases as a result of movement of the flexible layer away from the unbonded region of the base, and the cover defining a mixing channel that is open to the openings in the base such that the mixing channel can transport a liquid from one of the openings in the base to another of the openings in the base; one or more chambers in the cartridge, the one or more chambers being defined by the layers; and one or more channels that provide liquid communication between the mixing component and the one or more chambers, the one or more channels being defined by the layers.