Abstract:
Total and immediate closure device which can be fitted on various containers, in particular bottles, tubes and jars, whether rigid or flexible, includes a hood (10) made of an elastic deformable material which can be fitted on the mouth (21) of a container (2). Hood (10) is pierced axially with an opening (11) into which there is tightly inserted a cylindrical body (22) an end of which is located inside of the container (2) penetrating into the opening (21) thereof and is rigidly fastened to the inner part (24) of said container (2) so as to provide a space along the outside of body (22) for the passage of the contents (23) from the said container (2).

Description:
This is a continuation of application Ser. No. 07/816,753, filed Jan. 2, 1992, now U.S. Pat. No. 5,271,513. 
    
    
     BACKGROUND OF THE INVENTION 
     The present invention relates to a device for total and immediate closure which can be placed on various containers, bottles, tubes, jars, whether rigid or flexible, which are used in the fields of pharmacy and cosmetics for liquid or paste products. 
     In these fields, the use of the products, whether in liquid or paste form and whatever the content, requires an effective closure device in order to avoid the partial drying out of said products. 
     The existing closure devices are in most cases formed of a simple cap which is fitted after use on the mouth of the container by thread or other fastening means. 
     In all cases, closing is effected by placing a cap of hard material on a container of hard material, which does not make it possible to obtain a perfect seal and entails the risk of the partial drying out of the product. 
     SUMMARY OF THE INVENTION 
     It is an object of the present invention to overcome this drawback, it proposing a device of simple design and reduced cost of manufacture which permits the immediate and complete closing of a container after use. 
     The closure device forming the object of the present invention comprises a hood made of an elastic deformable material which can be fitted on the mouth of the container, said hood having an axial hole into which there is closely inserted a cylindrical body of a diameter less than that of the mouth of the container, and the end of which located on the container side penetrates concentrically into said mouth, to the inner wall of which it is firmly attached at several points. 
     When the contents are placed under pressure, the contents exert pressure on the wall of the mouth of the said hood of deformable material, which moves away from the central cylindrical body permitting the contents to emerge. When the pressure on the content is released, the wall of the opening of the hood, due to its elasticity, resumes its initial position around the body, closing the container. 
     The elastic deformable material used to produce the hood of the device of the invention can be a natural rubber, an elastomer, a silicone, or an elastic thermoplastic material. 
     As examples of materials which can be employed mention is made of butadiene-styrene or butadieneacrylonitrile copolymers, polymers of chloroprene, butyl rubbers, thioplasts, ethylene/ethyl-acrylate or ethylene/vinyl-acetate copolymers, and amide block polyethers, this enumeration not being all inclusive. 
     It is to be noted that the present invention, associated with that described in patent application No. 91/03079 in the name of the present applicants and covering a dosaging device, makes it possible to obtain a dosaging device with total and immediate closure which is capable of multiple uses, by utilization of the properties of elasticity and tightness of a part made of elastomer, in order to aspirate the contents of the receptacle on which it is fitted. 
     By imparting said part of the somewhat modified shape of the hood of the closing device forming the object of the present invention and by placing it upstream of said hood, one obtains a dosaging distributor which is completely and immediately closable, and of simple design, requiring only a few parts as compared with the equivalent devices at present on the market. One can thus produce distributors for very small doses, in particular of the dropper type. 
     The closure device of the invention can advantageously be used for products containing volatile components such as nail lacquers, in which case its central cylindrical body can be extended by a brush permitting the application thereof. 
     Other features and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a vertical section through a first embodiment of the closure device according to the present invention; 
     FIG. 1a is a sectional view along the line XX&#39; of FIG. 1; 
     FIG. 2 is a vertical section through the same device upon the expulsion of the content; 
     FIG. 3 is a partial section through a second embodiment of the device according to the invention; 
     FIG. 4 is a partial section through the closure device associated with a dosaging device; 
     FIG. 5 is a partial section through a closure device used with a brush; 
     FIG. 6 is a partial section through another closure device used with a brush, associated with a dosaging device; 
     FIG. 6a is an overall view, in elevation, of another closure device used with a brush, associated with a dosaging device. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     If one refers to FIG. 1, it can be seen that the closure device 1 of the present invention is assembled at the end of a container 2 on the mouth 21 of the container 2. This closure device comprises, on the one hand, a hood 10 of elastic, deformable material surrounding the mouth of the container and pierced axially by an opening 11 and, on the other hand, a cylindrical body 22 firmly attached to the container 2 concentric to the opening or mouth 21, said cylindrical body 22 being tightly inserted in the opening 11 of the hood 10. 
     Referring to FIG. 1a it can be seen that the cylindrical body 22 is firmly attached to the wall 24 of the mouth 21 via uniformly spaced bridges 25 which maintain said cylindrical body 22 at a given distance from said wall 24. 
     Referring now to FIG. 2, it can be seen that when pressure is applied on the contents 23 the contents are compressed, at the level of the opening 21, on the zone of contact between the cylindrical body 22 and the internal wall 12 of the opening 11 of the hood 10. Due to the deformability of the hood 10, this inner wall 12 moves away from the surface of the cylindrical body 22, allowing the contents 23 to escape. 
     When the pressure is released, the hood 10 resumes its initial shape and closes the container 2, the contents 23 remaining sheltered from air. 
     Referring now to FIG. 3, it can be seen that the closure device of the invention can be fitted to any existing container, provided that the latter has a fastening means such as a screw thread. 
     In this FIG. 3 one can note a container 4 having an opening 40 provided on the outside with a screw thread 41 serving initially for the closing by means of a conventional cap, on which there is fitted a closure device 5 having an outer body 50, provided with a screw thread 51 which permits its attachment to the container 4, which is provided axially with an opening 52 which extends the opening 40, and having a hood 53 of elastic deformable material itself provided with an opening 54 in which there is tightly inserted a cylindrical body 55 which is firmly attached to the outer body 50 and is concentric to the opening 54. 
     Referring now to FIG. 4, it can be seen that the closure device 1 can be associated with a dosaging device 6 such as described in Patent Application 91/03079. 
     This dosaging device 6 is formed of a part 60 of deformable material, comprising a part 61 similar to the hood 10, having an opening 62 in which there is tightly inserted a cylinder 27 firmly connected to the container 2 and placed concentrically in a tube 28, creating an annular space 29 communicating with the inside of the container 2 which contains the contents 23. This wall 61 is extended peripherally by a tubular body 63, the upstream or lower end of which has a rim 64 which permits its attachment to the cap 26 of the container. Exit neck or extension 99 projects sideways from cap 26. Mouth or exit passage 21 extends axially through exit neck 99. 
     As a result, under the action of a pressure P on the cap 26, the tubular body 63 of the part 60 is stretched and the product contained in a dosaging chamber 65 is expelled towards the mouth 21 of the chamber 65. Upon release of the cap 26, the tubular part 63 resumes its initial shape, causing the aspirating of the contents 23 into the chamber 65 through the annular space 29. 
     A closure device 1 located downstream of the dosaging chamber 65 permits the contents 23 of this dosaging chamber 65 not to be in contact with the outer air. 
     If one refers now to FIG. 5, it can be seen that the closure device of the invention can advantageously be applied to a bottle of nail polish. 
     In this embodiment, the cylindrical body 22 of the closure device has an extension 220 emerging from the hood 10 and at the end of which there are peripherally attached the bristles 221 of a brush 222. 
     The hood 10 is folded towards the outside at its base, forming an extension 13 the end of which covers the base of the bristles 221 and provides an annular space 14 above the opening 11 of the hood 10. 
     At the level of this annular space 14, the extension 220 of the cylindrical body 22 has radial openings 223 communicating with an axial channel 224 debouching between the bristles 221. 
     A pressure on the container 2 has the effect of expelling the contents 23 through the opening 11 of the cap 10, said contents 23 spreading out in the annular space 14 and then flowing through the openings 223 into the axial channel 224 up to the bristles 221 of the brush 222. 
     The unit comprising the brush and the closure device is covered by a hood 20 of hard material, the tightness between these two parts being assured by the contact between the inner wall of said hood 20 of hard material and the outer wall both of the hood 10 and of its extension 13, both made of a single block of elastic material. 
     If one now refers to FIGS. 6 and 6a, there can be noted in these figures another device for the distributing of nail polish or other products of the same type, in which the closure device 1 is associated with the dosaging device 6 described above, so that the distribution of the polish is effected by pressure on the head of the distributor, in which case the container 2 is of flexible material and placed in a rigid envelope 2&#39; covered on top by a hood 2&#39;&#39; of hard material, which assembly may have the shape and the size of a fountain pen. 
     In this case it is not necessary to distribute a complete dose upon each pressing, the dosaging device being used, in particular, to pump the contents and force the contents from dosaging chamber 65a through exit passage 21a, and downstream through radial opening 223 and axial channel 224 up to the brush 222. 
     It goes without saying that the present invention is not limited to the above description of certain of its embodiments and may be subjected to a number of modifications without thereby going beyond the scope of the invention. 
     Although the present invention has been described in relation to particular embodiments thereof, many other variations and modifications and other uses will become apparent to those skilled in the art. It is preferred, therefore, that the present invention be limited not by the specific disclosure herein, but only by the appended claims.