Dispenser with expansible member and contracting fabric
AssigneeE. I. Du Pont de Nemours and Company
InventorsJohn Rayford Fowler, Edward Merrick Hogan
Life of this patent
Estimating the term…
Abstract
A fluid dispensing container of the volume-expansible bag type is provided wherein the force for dispensing fluid is provided by the contracting force of an expansible fabric having elastomer yarn in the direction of contraction disposed about the volume-expansible bag.
Claims10
In a fluid dispensing container comprising a volume-expansible member for receiving and holding said fluid and means for forcing said volume-expansible member to contract in volume so as to dispense said fluid therefrom, the improvement comprising an expansible fabric disposed about said volume-expansible member and having a uni-directional recovery force to contract said volume-expansible member sufficiently to substantially empty it of said fluid, thereby serving as said forcing means, said fabric comprising elastomer yarn supplying said recovery force to said fabric and yarn in engagement with said elastomer yarn to maintain the position of said elastomer yarn in the fabric during expansion and contraction of said fabric so as to prevent blow-out of said volume-expansible member.
Dependencies are inferred from the claim text.