Bag for dispensing fluid material and a dispenser having the bag

Details Bag for dispensing fluid material and a dispenser having the bag Bag for dispensing fluid material and a dispenser having the bag

1995-07-31

1997-12-16

Derakshani, Philippe

Dispensing

Collapsible wall-type container

With casing or support

222494, B65D 3556

Patent

active

056975252

DESCRIPTION:

BRIEF SUMMARY
This invention relates to a bag for dispensing fluid material such for example as liquids and creams.


DESCRIPTION OF PRIOR ART

Wall mounted dispensers for dispensing liquids and creams are known. They usually incorporate either an expensive pump or a disposable bag which has a deformable tube sealed into the bag, the deformable tube containing expensive mechanical non-return valves.
It is an aim of the present invention to provide a bag for dispensing fluid material which incorporates non-return valves which are considerably cheaper than the known expensive pumps and non-return valves.


SUMMARY OF THE INVENTION

Accordingly, in one non-limiting embodiment of the present invention there is provided a bag for dispensing fluid material, which bag comprises a storage portion for storing the fluid material, a dispensing portion for receiving the fluid material from the storage portion, a first non-return valve for controlling the passage of the fluid material between the storage portion and the dispensing portion, and a second non-return valve for controlling the dispensation of the fluid material from the dispensing portion: the first and the second non-return valves each having flaps of material formed by sealing during the formation of the bag; and the first and the second non-return valves being such that the first non-return valve closes when the second non-return valve opens for fluid dispensing purposes, and the first non-return valve opens when the second non-return valve closes, whereby in use the bag operates such that when the dispensing portion is squeezed the fluid material is dispensed from the dispensing portion without being forced back into the storage portion, and such that after the dispensation of the fluid material, the dispensing portion is replenishable with fluid material from the storage portion.
The bag may be used for dispensing any suitable and appropriate type of fluid material. The fluid material may thus be a liquid such for example as liquid soap. The fluid material may be a cream such for example as a soap cream or hair cream. The fluid material may be a gel such for example as hair gel. The fluid material may also be a powder. Because the non-return valves are made of the flaps of material formed by sealing during formation of the bag, the bag can be produced in a very simple and cost effective manner.
Usually, the dispensing portion will be narrower than the storage portion. The dispensing portion may form a neck portion of the bag.
The first non-return valve may comprise a pair of flaps which are positioned inside the bag and which are separate from side walls of the bag.
Advantageously, the pair of flaps are formed to be joined together to seal the storage portion from the dispensing portion until such time as the bag is to be used. This stops the possibility of leakage of the fluid material from the dispensing portion though the second non-return valve, for example during storage of full bags when the bags are stacked on top of one another in containers such as cartons or cases.
Preferably, the pair of flaps are constructed to be separable from one another by the application of pressure to the storage portion. In order to achieve this, the pair of flaps may be formed from a thinner material than the material of side walls of the bag, whereby the thinner material is caused by the pressure to rupture. Alternatively or in addition, the pair of flaps may be constructed to be separable from each other by having ajoining portion provided with one or more areas of weakness such for example as a row of depressions extending nearly through the material of the connecting portion or a slot extending nearly through the material of the connecting portion.
Preferably, the second non-return valve is formed by side wall portions of the dispensing portion of the bag.
The bag may include securing means for securing the bag to a dispenser.
The securing means may comprise first securing means for securing a first part of the dispensing portion to a fixed part of the dispenser, and second s

REFERENCES:
patent: 2772817 (1956-12-01), Jauch
patent: 3485419 (1969-12-01), Taylor
patent: 3829342 (1974-08-01), Prisk
patent: 4573612 (1986-03-01), Maddison et al.
patent: 4776495 (1988-10-01), Vignot
patent: 5176510 (1993-01-01), Nilsson
patent: 5242083 (1993-09-01), Christine et al.

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