Dispensing – With flow controller or closure – Plug
Patent
1998-09-21
1999-11-02
Kashnikow, Andres
Dispensing
With flow controller or closure
Plug
222562, 215307, 220254, 220792, 2643287, B65D 5100, B29B 700
Patent
active
059753811
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to an injection-moulded dispensing cap comprising a dispensing nozzle equipped with a removable stopper. This cap is intended to be fitted to a container containing the liquid product. The invention also relates to a method for the simultaneous manufacture of the cap and of the stopper, by dual injection of two different materials. More specifically, this method makes it possible, in a single mould, to obtain the cap comprising the stopper fitted onto the nozzle.
The cap of the invention is intended, in particular, to be fitted to a container such as a bottle with a neck, with fairly compressible walls containing, for example, a shampoo, a care cream, a liquid foundation, a hair lotion, or in particular any other cosmetic, pharmaceutical or personal hygiene product. These products are marketed in vast numbers and so the cost of their packaging needs to be as low as possible.
DISCUSSION OF THE BACKGROUND
Currently, bottles fitted with a cap of this kind are obtained, in general, by attaching the cap to the neck of the container, for example after snap-fastening or screwing, once the container has been filled with the liquid to be dispensed. In an additional step, the stopper is fitted over the nozzle of the cap to prevent the liquid from running out during storage or transport.
SUMMARY OF THE INVENTION
A first objective of the present invention is to equip a product bottle with a dispensing cap whose cost of manufacture and of mounting is highly advantageous. In particular, the invention aims to reduce the costs of manufacturing and of packaging a bottle equipped with a dispensing cap with stopper. Thus, the invention proposes a cap equipped with a stopper which can be obtained by injection moulding in a single operation by the technique of dual injection of two different materials into an appropriate mould. The invention in particular has the advantage that the stopper can be overmoulded onto the nozzle of the cap by a simple moulding process, thus avoiding an additional operation of fitting the stopper over the nozzle.
Document WO 91/01 213 discloses a method for manufacturing a tube, this tube having a neck on which there is fitted a closure stopper of approximately cylindrical shape. This method consists in forming, in a four-part mould, first of all the stopper by injection-moulding a first material, then, by a helical movement of a first annular part of the mould, creating a volume intended to form the neck of the tube, then, by moving another part of the mould, of annular shape and surrounding the said first part, creating a complementary volume intended to receive the body of the tube. Into the volumes thus created there is then injected a second material appropriate for forming the body and neck of the tube. The tube fitted with the stopper is then removed from the mould. This method has the drawback of requiring a relatively complicated mould made in four parts, one part of which has to be moved axially and another part of which has tc be moved simultaneously in translation and in rotation relative to the two stationary parts, in order to create the volume receiving the neck and body of the tube. Furthermore, this moulding method is limited to the production of parts which are essentially in the shape of right cylinders.
The present invention makes it possible to use a simple mould requiring, for the injecting of the cap according to the invention, only an axial movement of just one part of the mould, thanks to the stopper having an approximately frustoconical shape.
Thus, the present invention relates to a thermoformed dispensing cap that can be fitted to a container full of a liquid product, comprising: an elongate dispensing nozzle, the said nozzle having a free end pierced at its centre with an orifice for dispensing the liquid product; a stopper for removably closing the nozzle, the nozzle being formed of a first thermoplastic material, and the stopper being formed of a second thermoplastic material, the f
REFERENCES:
patent: 5271513 (1993-12-01), Crosnier et al.
patent: 5439124 (1995-08-01), Mock
patent: 5596814 (1997-01-01), Zingle et al.
patent: 5705112 (1998-01-01), Gram
English language abstract for DE 1941479, Feb. 19, 1970.
English language abstract for DE 3114827, Nov. 4, 1982.
English language abstract for CH 659990, Mar. 13, 1987.
English language abstract for DE 3039796, May 6, 1982.
"L'Oreal"
Kashnikow Andres
O'Hanlon Sean P.
LandOfFree
Dispensing cap equipped with a stopper, and method of manufactur does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dispensing cap equipped with a stopper, and method of manufactur, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dispensing cap equipped with a stopper, and method of manufactur will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2124023