Valve top

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B - Operations, Transporting

65

D

B65D 47/20 (2006.01) B65D 35/28 (2006.01) B65D 35/50 (2006.01)

Patent

CA 2664048

A refillable bottom dispensing package forming a closed space in which fluid material can be stored and from which such material can be dispensed, the package having a rigid wall adjacent a bottom thereof, the wall having a hole, a resilient valve regulating dispensing of the fluid material contained in the package through the hole, the valve being closed to the passage of fluid material through the hole when the contents of the package are substantially at atmospheric pressure and being opened by pressure on the contents when said pressure is above atmospheric pressure, the valve forming a flap seal against a surface of said wall, the sealing action of the flap seal against said wall surface being free of influence from structural elements of the package while being directly responsive in its sealing force against the wall surface to the pressure level of the contents in the package space, the inter-relationship of the flap seal and the wall within the package being arranged to avoid impeding removal of the valve from the wall and the package.

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