Toilet – Methods
Utility Patent
1997-04-17
2001-01-02
Manahan, Todd E. (Department: 3732)
Toilet
Methods
C132S293000, C132S320000, C206S229000
Utility Patent
active
06167890
ABSTRACT:
BACKGROUND OF THE INVENTION
There exist pasty compositions for use in makeup that need to be extruded through dies of large diameter because of their high viscosity.
It is known to package such pasty compositions in pots or in depressions in a case or “compact”, where the opening for inserting the substance is large enough to enable filling to be performed at a high rate by means of an extrusion die.
OBJECTS AND SUMMARY OF THE INVENTION
The invention relates to a novel type of packaging for a product of creamy to pasty consistency.
More particularly, the invention seeks to provide a bag for packaging a product of creamy to pasty consistency, the bag comprising at least a front sheet and a back sheet which are assembled together so as to contain said product in the form of a thin layer spread out between said sheets, the front sheet at least being flexible and also having a zone that is permeable to said product, the flexibility of the front sheet being selected in such a manner as to enable it to be pressed against the back sheet by means of a finger or of an applicator, thereby making it possible firstly for the user to extract product, and secondly to ensure that the bag can be emptied completely.
The permeability to the product of the front sheet through which the product is dispensed can be obtained by means of multiple perforations through the sheet or by making said sheet out of a porous material that is woven or non-woven or spongy or sintered.
It is also possible to make said permeable zone by superposing a perforated film on a film of porous material that is woven or non-woven or spongy or sintered.
The user can take the product contained in the bag by wiping a finger over the front sheet, or by using an applicator.
The front sheet may be made of a flexible material, giving the user a soft-touch feel.
Also, the user can take exactly the necessary quantity of product by pressing the front sheet against the back sheet which may be rigid, semi-rigid, or flexible in which case it must be resting against a rigid surface, whereas taking just the right amount is not always possible when the product is packaged in a pot and the product itself is either very adhesive or else hardly adhesive at all.
In the first case the product tends to adhere as a lump on the user's finger, thus making it difficult to extract a small quantity only of product from the pot.
On the contrary, if the product hardly adheres at all, and has a tendency to form clumps without sticking to the user's finger, then it is difficult to extract the product cleanly.
By means of the invention, it is possible to package a product of creamy to pasty consistency even if it is very adhesive or hardly adhesive at all, without encountering the drawbacks of packaging such a product in a pot.
The invention thus makes it possible to package a very wide range of products.
In a particular embodiment of the invention, the front and back sheets are substantially plane and are assembled to each other so that once the bag has been completely emptied, the bag is plane and said sheets are in contact with each other over a major portion of their area.
Advantageously, the sheet which is permeable to the product is covered in a peel-off film to prevent the product escaping and to guarantee that it is preserved from coming into contact with air until first use.
In a particular embodiment of the invention, the front sheet, which is permeable to the product, is covered by a mask having a central opening.
Advantageously, said mask is constituted by a rigid frame.
The bag may advantageously be used as a refill in a makeup case.
The invention thus also provides a makeup case including a receptacle having a bottom and receiving a bag as specified above, the back sheet resting on said bottom.
In a particular embodiment of said case, the bottom of said receptacle is rigid and the back sheet of the bag is flexible and rests against said bottom.
In another particular embodiment of said case, said receptacle is constituted by a drawer making it possible, when extracted from the case, to insert or replace the bag.
The invention also provides a method enabling a bag to be manufactured for packaging a product of creamy to pasty consistency, and more particularly a product that is very viscous.
The method comprises the following steps:
forming a sandwich comprising a mass of the product spread out between two sheets, at least one of which is flexible and one of which is permeable to said product or is suitable for becoming permeable thereto;
compressing said sandwich along at least one closure line so as to bring said sheets together; and
bonding said sheets together along said closure line.
Advantageously, said mass of product is spread out by pressing the sheets against each other.
In a particular embodiment, the bag includes a sheet which is perforated at least in its central region and which is covered over its perforated region by a removable film.
The mass of product may be deposited on one of the sheets and then covered by the other sheet.
In a variant, the two sheets are preassembled to form a pocket into which a large-diameter nozzle can be inserted for injecting the product.
Advantageously, the sheets are preassembled so as to form a funnel outside said pocket, thereby facilitating insertion of the filler nozzle.
After the pocket has been filled, the side through which the filler nozzle was inserted is closed and the funnel is cut off, thereby forming said bag.
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L'Oreal
Manahan Todd #E.
Oliff & Berridg,e PLC
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