Importance

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Abstract

Disclosed flexible fluid reservoirs include a front sheet and a rear sheet that are sealed around their mutual perimeters to form a bladder, and include at least one fluid port in an upper portion of the front sheet. The reservoirs can include rigid structural portions in combination with flexible bladder wall portions to provide increased stiffness in desired portions of the reservoirs. Some disclosed reservoirs include a rigid spout portion that is coupled to the front bladder wall and forms the upper fluid port. Such rigid spout portions can provide a gripping portion to hold and manipulate the reservoir, can provide an enlarged surface area that connects to the bladder wall to distribute forces applied between the bladder and the spout portion, can provide a desired size, shape and orientation of the port, can help counteract torque applied while twisting the cap, and/or can help shape and flatten the bladder.

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First Claim