CAP WITH A DISPENSER FOR LIQUIDS

Abstract: The invention discloses a cap made of plastic material for containers holding liquids, which comprises an essentially cylindrical main body and an element (20) for dispensing the liquid. Said dispensing element has an essentially round, flat upper part, hinged into the main body and a lower part in the shape of a socle having a partially cylindrical base surface (27) which slides on the corresponding concave surface (6) belonging to the main body (1). The con!act between the cylindrical surface of the base and the concave surface (6) of the main body insures the tightness. Moreover, around the opening of the concave surface (6) of the cylindrical body (1) there is a ring-shaped projection (8) acting as a seal when the dispenser is in its open position. When the dispenser is closed, said ring-shaped projection (8) matches a corresponding round indentation (30) which is found in the base, so as to insure the tightness between the dispenser and the body of the cap, regardless of the position of the container.

Description: The invention concerns a container cap with a dispenser particularly suited to be used on bottles or flagons containing liquids, for instance cosmetics, liquid soaps, shampoos, sun lotions and similar. The indication of its use is given as an example only but is not meant to limit the field of application of the cap according to the invention. Caps for containers of liquid cosmetics, such as shampoos or lotions are available on the market. Their mode of operation consists essentially in the fact that the cap comprises a dispenser for liquids which can be operated by the user. One of the known caps (DE-A-2 644 758), for instance, has at the upper end of the cap itself a plastic hollow insert, which is hinged around a horizontal axis and can rotate from a horizontal to a vertical position, so that, when the insert is in its horizontal position, the liquid is prevented from pouring out of the bottle, while, when the insert is set in its vertical position, the opening which is present at the bottom of the cap and in contact with the neck of the bottle is aligned with the channel of the vertical insert, thereby allowing the liquid to flow out of the bottle. Since the bottom of this insert has a cylindrical shape and said bottom rotates on a surface which is also cylindrical, wherein there is the opening for the outflow of the liquid, this type of cap does not present any special problem connected with the leakage of the liquid, when the cap is in its closed position. However, limitations of the just described cap consist in that the opening and closing operations must be performed by the operator with both hands, i.e. with one hand holding the bottle and with the other operating the rotation of the insert. Another type of cap which is used in the same field of cosmetic products presents an essentially cylindrical body with a vertical opening and an upper element having essentially the shape of a disc presenting underneath a little hollow tube for the outflow of the liquid. The upper element engages said cylindrical body, is hinged to it about a horizontal axis and can rotate by a certain angle when it is pressed with the finger tips. When the upper element is in its horizontal position, it shuts the hollow tube belonging to the central body, through which the liquid would flow out; on the other hand, when the upper is pushed with a finger and arranges itself at an inclined position, the tube belonging to the central body and the channel which is present on the rotating element are aligned. While this cap presents the advantage that it can be opened and closed with a single hand holding the flagon or the battle, it has the limitation of not being suited for dispensing very fluid liquids, since its seal is rather precarious, so that the liquid may pour out even when the cap is in its closed position or the liquid besides pouring out of the channel also leaks through the space between the rim of the cap body and the rotating element. The NL-A-8105763 patent document discloses a cap for a bottle sealed by a lid swivelable about a horizontal axis and sealed by the conjugate profiles of the cap and of the lid. But this kind of sealing gets damaged with the use of the cap. The main purpose of the present invention is to overcome the mentioned inconveniences. The main proporsed purpose is to realize a cap with a dispenser for liquids which is perfectly sealed, regardless of the density of the liquid to be dispensed and which can be operated with the same hand holding the bottle. Another proposed purpose is to obtain a cap with a dispenser being shaped so as to compensate for possible variations of the thickness of the bottle neck, so that a perfect seal is obtained between the cap and the rim of the bottle neck. All above-mentioned purposes and others, which will be better understood hereafter are fulfilled by a cap for liquids, made of plastic material, comprising a main, essentially cylindrical body which tightens on a bottle or flagon and presents an upper surface, which is concave toward the exterior, with an opening communicating with a channel belonging to the liquid-dispensing element, which is connected with said body, so that it can rotate around an axis being perpendicular to the geometrical axis of said body and wherein said cap is characterized in that said element presents an essentially cylindrical, upper, outer, flat, part, which is hinged onto the upper rim of the main body and a lower part having the shape of a socle and acting as a base and having its lower surface in a partially cylindrical shape and sliding on the correspondingly shaped concave surface belonging to the main body, wherein said base part presents an opening belonging to a channel whose first section, beginning from said opening, is essentially vertical and whose second section is essentially perpendicular in relation to the first and is obtained underneath the flat surface of the dispensing element, and it ends with an opening on the lateral rim of said element. One of the advantages given by such a shape of the cap is that the hermetic tightness of the connection is always insured both when the dispensing element is in its open, liquid dispensing position and when it is in its closed position. In the first case the tightness occurs between the opening belonging to the main element, which is present on the concave surface of the main cylindrical body and the opening belonging to the dispensing channel which is connected with said opening. When the dispensing element is in its closed position, the base belonging to the dispensing element presents, as will be described hereafter, an indentation which lies over the ring-shaped projection which is present around the opening of the concave surface of the main cylindrical body, so that the hermetic tightness is insured in this case, too. Another advantage obtained with the cap according to the present invention is represented by the fact that the opening and closing operations can be performed with a single finger belonging to the hand holding the container on which the cap is applied, without any need to use the other hand. This fact is not unimportant since it makes it easier to use the liquid held in the container in the most varied situations, without causing any discomfort to the user. Another advantage which will be pointed out arises from the fact that the essentially round shape in the convex area of the main cylindrical body which rests on the rim of the container neck allows it to rest on the whole rim of the container, regardless of the variations in the thickness of the container, which are possible particularly in containers made of glass. This permits a wider flexibility of application and a decreased need of observing dimensional tolerances in the manufacture of the container. Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific example, while indicating a preferred embodiment of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description, and from the drawings, wherein: Fig. 1 shows in a perspective view the main body of the cap; Fig. 2 shows a perspective view of the dispensing element which is connected with the upper part of the cap; Fig. 3 shows in a perspective view the bottom of the base of the dispensing element; Fig. 4 is a cross-section of the cap as a whole, therefore comprising its main cylindrical body and its dispensing element, wherein the dispensing element is in its closed position; Fig. 5 shows, also in a cross-section view, the cap according to the invention with the dispensing element in its opened position suited for the outpour of the liquid. With reference to the mentioned Figures, it will be observed that the cap according to the invention, indicated as a whole with 10, has an essentially cylindrical body indicated with 1 and having two co-axial skirts, wherein the outer skirt is indicated with 2 and the inner, shorter skirt is indicated with 3. Said inner skirt 3 also presents a thread on the inner side said thread being indicated with 4. Said thread 4 is the thread which engages the corresponding thread on a container 5, thereby tightening cap 10 on the container. In the upper junction between the inner cylindrical skirt 3 and the outer cylindrical skirt 2 there is a concave junction surface 6, whose concavity, which is turned to the exterior of the cap, is well visible in Fig. 1. Said concave surface has an opening 7, arranged essentially in the central position and around its edge there is a ring-shaped projection 8; it will be described hereafter how this ring-shaped projection permits the tightness between the dispensing element and the body 1 of the cap. By observing Fig. 1 it will also be noticed that on the concave surface 6 of the main cylindrical body 1 there are two more linear projections indicated with 9 and 11 respectively, arranged at opposite sides in relation to opening 7; as will be seen, said projections are used as stops for the opening and closing movements of the dispensing element connected with the main body 10. The dispensing element, indicated as a whole with 20, consists of an upper part in the shape of a disc indicated with 21, presenting a rim 22 underneath which there is a channel indicated as a whole with 23. Said channel is essentially in the shape of a right angle and it has a first vertical section 24 and a second section 25 which is tangent to the lower surface of disc 21, the vertical section 24 ends with a hole 26 belonging to the base 27 which has a part cylindrical shape with its generating lines parallel to the axis of rotation of the dispensing element 20, said axis passing between two diametrical pivots 28 at the level of rim 22, one of which is represented in Fig. 2. Said pivots 28 are lodged within slits 29 which are present in the lateral rim of the concave surface 6 belonging to the main cylindrical body 1. On the lower surface of base 27 which is in contact with the concave surface 6, and next to hole 26 there is a round indentation annulus surface 30 which, as can be observed in Fig. 4, when the dispensing element is in its closed position, closes and seals opening 7, since it superimposes itself over the ring-shaped projection 8. Thus a perfect tightness against the outflow of the liquid held in the bottle or container is insured, said tightness being insured by two simultaneous factors: the first one is the already mentioned one, i.e. the hermetic closing of opening 7, while the second one is represented by the fact that the convex surface 12 opposite to the concave surface 6 rests against the entire rim 13 of container 5 and thereby insures the seal against the outflow of the liquid contained in the bottle regardless of the position of the latter. When a depression 31 of the dispensing element 20 is pressed, the dispensing element is caused to rotate, as can be observed in Fig. 5, and the conveying channel 23 is set into communication with opening 7, so that the liquid contained in bottle 5 can flow out. The stop 9 insures the correct position of the dispensing element 20 and it also insures that the ring-shaped projection 8 is inserted within the mouth hole 26 belonging to the channel section 24. Thus all the liquid flows out of hole 32 without being dispersed in the chamber which is created in the space comprised between the concave surface 6 and the lower part of the dispensing element 20. On the other hand, when the cap is closed, as can be observed in Fig. 4, the correctly closed position is insured by stop 11. In correspondence with this position the indentation 30 of base 27 superimposes the ring-shaped projection 8. As can be seen, the cap according to the inventions fulfils all the proposed purposes, since a cap has been obtained which, while it is easy to handle with one hand, also offers, whether when closed or opened, a good tightness, so that in its opened position it allows the outflow of the liquid exclusively through the opening of the dispensing element, and in its closed position it operates as a complete seal both around the neck of the bottle and on the hole belonging to the cap itself and connected with the dispenser.

Claims: A container cap for dispensing liquids made of plastic material comprising: an essentially cylindrical main body (1) tightened on the neck of a container (5), presenting a concave surface (6) turned toward the exterior of the container and having an opening (7) for the flow of liquid out of the container; a dispensing element (20) rotably connected to the main body and rotating around an axis perpendicular to the geometric axis of said main body (1), presenting an upper substantially flat circular part (21) and a right-angle shaped channel (23) ending with a base (27) having a curved surface sliding on the concave surface (6) of the main body (1), characterized in that the main body (1) presents, around the opening (7), a ring-shaped projection (8) coupling with the hole (26) of the channel (23) when the cap is in the dispensing position, or coupling with a round sunked indentation (30) when the cap is in its closed position, said coupling connections securing the sealing of the opening (7) of the main body in each position of the cap. A cap according to claim 1, characterized in that the main body of said cap presenting an essentially concave upper surface (6) toward the exterior of the cap, further presents an essentially semi-spherical shape (12) in its inner surface in contact with the neck of the battle, thereby insuring its tightness. A cap according to claim 1, characterized in that the concave surface of the main body presents two projections (9,11) positioned at the opposite sides in relation to the opening (7) and acting as stops of the base (27) of the dispensing element in the opened and closed positions of the cap respectively.

Inventors: SANTAGIULIANA, EVANS
Applicants: TAPLAST SRL
Application year: 1990
Main classification: B65D47
IPC codes: B65D47, B67D3