Dispensing – Collapsible wall-type container – Nonmetallic
Reexamination Certificate
2000-01-12
2001-06-12
Bomberg, Kenneth (Department: 3754)
Dispensing
Collapsible wall-type container
Nonmetallic
C222S212000, C222S494000
Reexamination Certificate
active
06244468
ABSTRACT:
TECHNICAL FIELD
The invention relates to valve means, and more particularly, but not exclusively, to valve means for use in dispensing liquids from containers and to dispensers comprising such valve means.
BACKGROUND ART
Liquid dispensers are known for dispensing liquid soap in washrooms and which consist of a wall-mounted device comprising a container for liquid soap and a hand operated plunger for dispensing shots or doses of the soap. Such devices are complicated, are comparatively expensive, are difficult to recycle because of the numerous materials used in each unit and are difficult to clean.
GB-A-1 463 579 and FR-A-1 196 939 both disclose a container for dispensing liquids having a valve means comprising an envelope of flexible sheet material having opposed inlet and outlet portions and an intermediate portion between the inlet and outlet portions, which intermediate portion comprises a transverse fold in the envelope to restrict or prevent flow of liquid between the inlet and outlet portions, the arrangement being such that liquid flow across the intermediate portion can be induced by distortion of the latter.
DISCLOSURE OF INVENTION
It is an object of the invention to provide a simple self-sealing valve, e.g. for a liquids dispenser.
It is among the objects of the invention to provide a washroom dispenser, e.g. for soap or hand cleanser or the like, which is simple in construction and which is hygienic.
It is also among the objects of the invention to provide a disposable liquid container having integral dispensing means.
It is another object of the invention to provide a liquids dispenser of flexible plastics sheet, which is readily recyclable.
From one aspect the invention is valve means comprising an envelope of flexible sheet material having opposed inlet and outlet portions and an intermediate portion between the inlet and outlet portions, which intermediate portion comprises a transverse fold in the envelope to restrict or prevent flow of liquid between the inlet and outlet portions, the inlet/outlet/intermediate portion arrangement being such that liquid flow across the intermediate portion can be induced by distortion of the intermediate portion, e.g. the application of pressure to the envelope upstream of the outlet portion, thus causing the seal created by the transverse fold to open to allow the material to pass, characterised in that the intermediate portion comprises a spaced pair of transverse folds, each fold thus creating an openable seal.
The spaced pair of folds may define a Z-shaped formation in the envelope. The downstream fold may comprise flow restricting means, e.g. a nozzle. The envelope may be made from plastics sheet, and the flow restricting means may comprise a permanent seal, e.g. a heat seal or weld extending transversely of the envelope. The flow restricting means may comprise a pair of converging seals which form a nozzle portion between them. The seal or pair of seals may also be arranged to hold the fold(s) in the envelope.
An intermediate chamber may be formed upstream of the inlet portion, e.g. to form dose regulating means. The intermediate chamber may be formed by one or more seals across the envelope to define a liquid inlet into the intermediate chamber. The arrangement. may be such that the liquid inlet into the intermediate chamber can be closed, e.g. by manual pressure applied by the user to the exterior of the envelope, after which the user can apply pressure to the intermediate chamber to evacuate the contents. via the outlet, in a process akin to milking a cow.
The envelope may be tubular. The envelope may comprise a sachet for containing the fluent material, e.g. liquid to be dispensed. The valve means may be disposed in a dispensing section of the sachet, which dispensing section may be formed as a manually graspable teat.
Thus from another aspect the invention is a dispenser for liquids comprising valve means as described above.
From yet another aspect the invention is a dispenser for liquids comprising a sachet as described above.
The sachet may be arranged for personal use, e.g. for fixing to the user's clothing or may be arranged for fixing to a wall or the like mounted dispenser. The sachet may be provided with eyelets in a marginal flange for mounting on supporting pegs on the dispenser or other fixing device.
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patent: 4163509 (1979-08-01), Amneus
patent: 4252257 (1981-02-01), Herzig
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patent: 5067635 (1991-11-01), Thomsen
patent: 5207355 (1993-05-01), Thomsen
patent: 0329532 (1989-08-01), None
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patent: 1463579 (1977-02-01), None
Farmer Harley
Prust Michael W
Bomberg Kenneth
Selitto Behr & Kim
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