VALVE TOP
First Claim
1. 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.
1 Assignment
0 Petitions
Accused Products
Abstract
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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Citations
14 Claims
- 1. 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.
- 9. A bottom dispensing squeeze bottle and dispensing closure combination, the bottle being molded of a thin wall relatively soft resilient plastic with a threaded neck opening, the closure being releasably threaded onto the bottle neck and having a hole therethrough, a resilient pressure responsive valve attached to the closure by removably capturing it in the hole by virtue of a part of the valve being larger than the hole and being inserted in the hole, the valve including a relatively thin flap seal on its periphery adapted to seal on an interior surface of the closure surrounding the hole.
- 12. A valve for a bottom dispensing package comprising an elastomeric body molded as a single piece with a valve head, the valve head being slit to form a pressure responsive dispensing orifice, a connector sleeve connected at one end to a periphery of the valve head and at an opposite end connected to a circular mounting base, a flap seal above at least a portion of the mounting base and extending radially in a plane transverse to the direction of flow of fluid passing through the slit formed orifice, the flap seal being relatively thin and thereby capable of sealing in a free state against a flat surface of a molded plastic surface, the width of the flap seal radially outward of the connection sleeve being at least as large as five times its average thickness.
Specification