A CAP FOR A VESSEL

Abstract: A cap (1) of a bottle (2) for a medical fluid (3) having a seal stopper (5) at an opening (4). The cap has a projection (8) integrally extending from a cap body (6) of a cap member, Around the base portion of the projection, there is formed a thin-plate portion (9) for bending and removing the projection from the cap body with ease and safety. The thin plate comprises a continuously recessed groove.

Description: BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a cap for a vessel, particularly to an effective technology to be applied to a cap of a bottle for a medical fluid such as a so-called vial. Related Art Statement Generally, a typical example employed as a bottle for a medical fluid is a flip-off cap, a pull-top cap or a clean cap, so called. Of these, there are the following problems in the case of a flip-off cap (cf., e.g., Japanese Utility Model Laid-Open No. 52-52853): a) it has a joint structure of a molded resin and pressed aluminum, and thus the cost thereof is high, b) it is difficult to keep sanitary quality because an alien matter such as a hair tends to be caught in the joint portion, and, moreover, c) breaking the seal of the cap is carried out by a fingertip, and thus, in such a case as in a hospital where a great amount of bottles are to be opened, the fingertip tends to be damaged, and much time is required to open them. While, there are also many problems in the case of a pull-top cap: a) it should be opened with both hands, and thus it is inconvenient, and particularly, much time is required where a great amount of the caps are used, b) a clip of the cap should be pulled upwardly with much force on breaking the seal, and thus much labor is required for the operations, and c) a finger or the like tends to be injured by the clip after the seal breaking. In contrast to these caps, in the case of a clean cap, the seal breaking can be done only by pushing a projection of the cap, and thus it is superb in an operational property and convenient even when used in large quantities. However, there also remain the following problems in the case of this structure. That is, in the structure as disclosed in, e.g., Japanese Patent Laid-Open No. 58-1662, the lower end of the cap has a split for the removal, and when the cap is removed, a rubber stopper sealing closely an opening of a bottle is also removed together. Accordingly, there remain the following serious defects: a) once it is opened, alien matters tend to enter therein from the opening, and thus it is difficult to keep the sterility, and b) it can be used only once because preservation of contents is difficult. Thus it is not usable in a brick test or the like where subdivison is required. In Japanese Utility Model Laid-Open No. 59-89855, there is disclosed a cap for a vessel having a seal stopper at an opening and specified in the preamble of claim 1. In the cap structure a plurality of through holes are formed in series around the base portion of the projection provided at the top side of the cap, and the projection can be removed by bending it at the portion of the through holes. However, by this cap structure, the opening edge of the cap after removing the projection by bending becomes a sharp jagged edge owing to the alternate combination of the formed portions of the through holes and non-formed portions thereof, so that when the projection is removed by pushing and bending it with, e.g., a tip of thumb, the palm side (inside) of the thumb tends to be injured by touching the said jagged edge. Thus, there remain problems that the cap is dangerous on the seal breaking operation thereof, and inferior in its operational property. Moreover, there also remains a serious problem that because a plurality of the through holes are formed at the top side of the cap, alien matters such as minute dust tend to enter from the through holes during preservation, and the space between the inner side of the cap and the rubber stopper is contaminated before opening. SUMMARY OF THE INVENTION An object of the present invention is to provide a cap for a vessel which is able to solve all the said various problems, and sanitary, and superb in the operational property. The cap for a vessel of the present invention is characterized by the features of the characterizing clause of claim 1. The cap is provided with a continuous thin-plate portion, for bending and removing the projection safely and easily from a cap body continuously, around the base portion of the projection integrally and vertically extending from the cap body of a cap member. According to the cap for a vessel of the present invention, the projection can be removed from the cap body with safety and ease only by pushing the projection with hand. Moreover, when the depth of the thin-plate portion is arranged uniformly, the bent edge of the projection does not become a sharp and jagged edge, so that the formation of fin after the bending removal of the projection can be prevented and the injury of the finger can be avoided. The cap has no through holes, and thus alien matters do not enter in the space between the inner side of the cap and sealing stopper, preventing the contamination before opening can be certainly prevented. Additionally, the sealing stopper is not removed even after opening so that the medical fluid in the bottle can be kept sanitary even after opening. Preferred embodiments are subject of the claims 2 to 5. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects and features of the present invention will become more apparent when referred to the following descriptions given in conjunction with the accompanying drawings, wherein like reference numerals denote like elements, and in which: Fig. 1 is a cross-sectional view of a bottle for a medical fluid having thereon a cap which is an example of the present invention; Fig. 2a and 2b show respectively a perspective view of the cap and a expanded partially sectional view of a thin-plate portion thereof; Figs. 3, 4, 5, 6 and 7 are perspective views respectively indicating other various examples of the cap for a vessel according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings, a cap 1 for a vessel of the present invention is exemplarily applied to sealing of a bottle 2 of a medical fluid. In the bottle 2, a predetermined amount of a medical fluid 3 is contained with a seal. Around the distal end of the opening 4 of the bottle 2, a sealing stopper 5 of, e.g., rubber is attached so as to seal and shut off the inside of the bottle 2 from the outside thereof. A thin-plate portion 5a is formed in a substantially central portion of the seal stopper 5, and thus the thin plate-portion 5a is pierced with ease by an injection needle or the like. The opening 4 of the bottle 2 and the seal stopper 5 are covered with the cap 1 so as to prevent a natural removal of the seal stopper 5 before opening, and contamination of alien matters. The cap 1 for a vessel is formed as a cap member integrally made of a metal material such as aluminum in this example, and includes a substantially plane cap body 6 for grasping and fixing a flange portion 5b of the seal stopper 5 to the top side of the opening 4 of the bottle 2, a fixing portion 7 for fixing the cap 1 to the opening 4 of the bottle 2 by extending downwardly from the outer edge of the cap body 6, covering the outer side of the opening 4 of the bottle 2, and being clinched inwardly at the lower end thereof, and a cylindrical projection 8 with a round head extending upwardly by a predetermined length from a substantially central portion of the cap body 6. On breaking the seal of the bottle 2, the projection 8 is to be bent and removed by pushing the projection 8 with, e.g., the inside of a thumb. In order to carry out the bending removal of the projection 8 with ease and safety, in this example, a thin-plate portion 9 formed at a base portion of the projection 8 in the form of a recessed groove by, e.g., half-pressing the material of the cap body 6 is continuously formed in the shape of a circular ring similar to the horizontal cross-sectional shape of the projection 8. The thin-plate portion 9 is not through the material of the cap body 6, and thus alien matters are completely prevented from entering into the inside of the cap 1 from the thin-plate portion 9. The thin-plate portion 9 is formed so as not to make fin at the bent edge thereof ruptured on bending removal of the projection 8. As shown in Fig. 2b, the cap body 6 has a declining portion 6a at the base portion of the projection 8, and the thin-plate portion 9 is formed by half pressing at the boundary portion between the inner edge of the declining portion 6a and the projection 8. Thereby, the fin is not made at the bent edge even on the bending removal of the thin-plate portion 9, and the bent edge is recessed at a lower position than a top face of the cap body 6, so that a worker can avoid to be injured at his fingertip. The outer surface of the cap body 6 can be used as a display portion 6b for displaying a name of article or maker, production number and/or marks by stamping or sealing as shown by two-dot chain line in Fig. 2a. Hereinafter, the operation of the example of the present invention will be described. The cap 1 for a vessel is formed as shown in Figs. 2a and 2b by pressing of a metal material in advance. At that time, the thin-plate portion 9 for the bending removal is formed simultaneously by half-pressing at the base portion of the projection 8. Then, the medical fluid 3 is poured into the bottle 2. Thereafter, the seal stopper 5 is fitted into the opening 4, and further the cap 1 is attached thereon, and the lower end of the fixing portion 7 is clinched inwardly to fix the cap 1 to the opening 4 of the bottle 2 and grasp the flange portion 5b of the seal stopper 5 between the top side of the opening 4 and the lower side of the cap body 6. When the bottle 2 is opened by breaking the seal thereof in order to take out the medical fluid in the bottle 2 provided with the seal stopper 5 and the cap 1, the bottle 2 is grasped by a hand, and for example, the projection 8 is pushed along two-dot chain line from the position of solid line in Fig. 1 with pressing the vicinity of the upper portion of the projection 8 of the cap 1 by the palm side of the thumb. As the result, the projection 8 is easily ruptured away at the thin-plate portion 9 of the base portion thereof, and removed from the cap body 6 at the thin-plate portion 9 in single movement. At that time, as the thin-plate portion 9 is formed as a continuously recessed groove, the remained bent edge in the side of the cap body 6 on the bending removal of the projection 8 does not become a sharp and jagged edge, but a smooth and continuous edge. Accordingly, there can be avoided the danger of injuring a fingertip on breaking the seal, and the seal breaking can be carried out rapidly, easily and safely with single movement operation by one hand. Even after the bending removal of the projection 8 from the cap body 6, the seal stopper 5 remains to be held at the opening 4 of the bottle 2 by the cap body 6 and fixing portion 7, so that there is no possibility that alien matters enter into the bottle 2 by the seal breaking. While, when the medical fluid 3 in the bottle 2 is taken out, the medical fluid 3 can be taken out easily in sanitary conditions by piercing, e.g., an injection needle into the thin-plate portion 5a of the seal stopper 5. Other Examples Figs. 3, 4, 5, 6 and 7 are perspective views respectively indicating other various examples of the cap for a vessel according to the present invention. An example shown in Fig. 3 is similar to the examples, in Figs. 1, 2a and 2b, however, the projection 8 thereof is formed in a substantially cylindrical shape, and the distal end thereof is not in the form of a round head, but a flat head. An example shown in Fig. 4 is similar to the example in Fig. 3, however, one side of the projection 8 thereof is formed in a flat face to be pressed by a thumb on the flat portion 8a. In this case, the thin-plate portion 9 is also formed in the same shape as the horizontal cross section of the projection 8 by half-pressing. Fig. 5 shows another example in which the projection 8 is formed in the shape of a square pillar, and the thin-plate portion 9 is also formed in the shape of a square and continuously recessed groove as similar to it. Fig. 6 shows still another example in which the projection 8 is formed generally in a flat pillar shape. Fig. 7 shows still another example in which the projection 8 is formed in a conical shape. In any case of Figs. 3 through 7, the projection 8 can be bent and removed with ease from the cap body 6 at the thin-plate portion 9 only by a light pressing by a finger. The present invention is not limited to the above-described examples, but the other various modifications are possible. For example, the cap 1 for a vessel may be made of any other metal materials than aluminum, or of synthetic resin, and the thin-plate portion 9 may be suitably formed by any given method such as molding other than half-pressing. Moreover, the shapes of the projection 8 may be ones other than those as described above. Particularly, when it is in the form which makes possible to be pressed in any given direction, the bending removal of the projection can be carried out with ease. Additionally, it can be easily colored, for example, by plating when the cap 1 is made of a metal, or by addition of pigment when made of synthetic resin. Accordingly, identification of the kind of articles by the color of a cap is possible. The present invention can be widely applied as caps for various vessels such as those of powder or freeze-dry articles other than the bottles for medical fluids. a) According to the present invention, in the cap for a vessel having the seal stopper at the opening thereof, the cap has the cap member covering the said opening and seal stopper from the outside thereof, the projection extends integrally and outwardly from the substantially central portion of the cap body of the cap member, the thin-plate portion for bending and removing the projection from the cap body of the cap member is continuously formed around the base portion of the projection, the said seal stopper keeps the sealing of the said opening even after the bending removal of the said projection from the said cap body, and thus, the seal breaking of the cap can be carried out in single movement, rapidly and easily. Moreover, the occurrence of fin at the bent edge of the thin-plate portion can be prevented, and thus the formation of the dangerous and sharp jagged edge can be avoided, so that the seal breaking can be carried out safely without injuring a fingertip. Particularly, the prevention of an incision by the present invention is extremely effective as a countermeasure against a medical accident such as a death of B type hepatitis or AIDS infectious inside a hospital, these accident being serious problems recently. b) Through holes are not formed at the base portion of the projection so that there can be certainly prevented the contamination caused by entering of alien matters such as dust into the space between the inner side of the cap and the seal stopper during preservation before the seal breaking, and the outside of the seal stopper can be also kept sanitary. c) The seal stopper is not dropped away from a vessel even after the seal breaking so that the inside and outside of the vessel are certainly separated by the seal stopper, and thus the sanitation condition can be kept preferable. d) Owing to the extension of the projection, the seal breaking can be carried out easily with small force, particularly, it is extremely suitable for the seal breaking of a great amount of vessels, further the vessel can be taken out from a box or the like by pinching the projection. e) By forming the whole body of the cap integrally with a single material such as metal or synthetic resin, the cap can be produced and processed at low cost. f) Restoration to the original state is impossible once the bending removal of the projection is done, and thus an alteration can be prevented.

Claims: A cap (1) for a vessel (2) having a seal stopper (5) at an opening (4), comprising: a cap member covering said opening (4) and seal stopper (5) from the outside thereof, a projection (8) extending integrally and outwardly from a substantially central portion of a cap body (6) of said cap member, and a portion (9) for bending and removing said projection (8) from said cap body (6) of said cap member, said portion (9) being continuously formed around the base portion of the protection (8), and said seal stopper (5) keeping the sealing of said opening (4) even after the bending removal of said projection (8) from said cap body (6), characterized in that said portion (9) for bending is a thin-plate portion, said cap body (6) has a declining portion (6a) at the base portion of said projection (8), and said thin-plate portion (9) is formed at the boundary portion between the inner end of the declining portion (6a) and the base portion of said projection (8). A cap (1) for a vessel (2) according to Claim 1, wherein said thin-plate portion (9) is a continuously recessed groove. A cap (1) for a vessel (2) according to claim 1, wherein said cap member is formed integrally with a single material of metal. A cap (1) for a vessel (2) according to claim 1, wherein said cap member is formed integrally with a single material of synthetic resin. A cap (1) for a vessel (2) according to claim 1, wherein said vessel (2) is a bottle for a medical fluid.

Inventors: ANZAI, NOBORU, KANO, TAKASHI, SUZUKI, ISSEI, WATANABE, YOSHIO
Applicants: MECT CORPORATION
Application year: 1988
Main classification: A61J1
IPC codes: B65D51, A61J1