Dispensing – Collapsible wall-type container – With wall-collapsing means
Patent
1994-08-10
1996-10-01
Kashnikow, Andres
Dispensing
Collapsible wall-type container
With wall-collapsing means
222105, B65D 3532
Patent
active
055605184
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to fluid delivery apparatus and more especially to dispensers for dispensing and delivering flowable materials such as pastes, liquids and the like from a reservoir of material by pressurising the contents of the reservoir as required to thereby expel material therefrom. The invention is of particular application to dispensers for toothpastes, soaps, creams, shampoos and the like.
BACKGROUND OF THE INVENTION
Toothpaste is commonly supplied in squeezable tubes which require a reclosable exit means typically a screw cap or snap action closure. Soaps, shampoos, hand creams and the like have been supplied in containers having trigger operated (or press down and release) pumping means for expelling the material from the container. Latterly it has been proposed to package toothpaste in containers having similar trigger operated (or press down and release) pumping means for expelling the material therefrom.
In order to dispense a fluid in the manner aforesaid a degree of pressurisation is required to force the fluid through an exit nozzle. Hitherto it has been commonplace to store the fluid in a pressurised container together with a low boiling point gas which serves as a fluid spring acting either directly or through a diaphragm onto the fluid which is to be dispensed. The need for a pressurised container tends to restrict the shape of the container. Additionally suitable low boiling point gases have either been found to be environmentally damaging or are flammable or have undesirable characteristics.
It is an object of the present invention to provide an improved dispenser for dispensing flowable materials such as toothpaste.
It is another object of the present invention to provide a dispenser into which may be fitted, throw-away containers in the form of sachets or reservoirs which when emptied can be removed and discarded to make way for a refill.
It is a further object of the invention to provide improved refills for such dispensing devices.
Yet another object of the invention is to provide an improved delivery system for fluids as aforesaid.
It is therefore still another object of the present invention to provide an alternative fluid delivery system which does not incorporate a pressurised gas and therefore does not require a pressure vessel.
SUMMARY OF THE INVENTION
According to one aspect of the present invention a dispensing device for dispensing flowable materials comprises: flowable material can pass, material to be dispensed, the support means serving to position a container relative to the discharge nozzle defining region and retain the container in position so that flowable material leaving the container exits through the nozzle defining region, and support means at least when discharge of material therefrom is required.
Preferably valve means is provided for controlling the flow of material through the nozzle defining region.
The invention thus provides a two part dispenser for dispensing flowable material comprising a first part incorporating means for delivering a flowable material supplied thereto, and a second part which is operatively connectable to the first part and which at least initially contains flowable material which is to be dispensed, the second part being separable from the said first part to permit a replacement second part to be fitted.
The invention thus provides a two part dispenser in which the said first part may be re-used many times, either with a series of containers each filled with a substance to be dispensed or with a single container which is recharged from a bulk supply when empty and then refitted to the first part, the said container or refillable container comprising the said second part.
According to one embodiment of the invention, a dispenser comprises an outer sleeve and a separable inner sleeve which can be secured as by screwing into the outer sleeve, a piston sealingly engaged within the inner sleeve and slidable therein and having projecting fingers which on the one hand engage the inside surface of
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Catterall Clive P. A.
Dando William G.
Gaylor Ian M. D.
Cambridge Consultants Limited
Douglas Lisa
Kashnikow Andres
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