SEALING CAP ESPECIALLY FOR ANTIBIOTIC, INFUSION AND TRANSFUSION BOTTLES

Abstract: A sealing cap of metallic material, particularly for antibiotic, infusion and trasfusion bottles, provided with a hole (7) on its upper wall (5), tightly closed by a metallic foil (8) substantially covering the whole wall (5) and provided with a knurled grip lunette (10) not projecting beyond the outline of the cap (2).

Description: The object of the invention is a sealing cap of metallic material, such as aluminium, particularly for antibiotic infusion and transfusion bottles provided with a hole on its upper wall, said hole being tightly closed by a metallic foil substantially covering the whole wall, such a cap being known from DE-A-3 130 246. The Italian model application no. 22314 B/82 of July 2, 1982, in the name of the same applicant, CAPSULIT S.p.A., shows a sealing cap for bottles of the kind provided with a central hole covered with a metallic foil which preferably occupies a portion of the cap upper wall and shows a projecting grip tongue in order to facilitate its removal. A cap so shaped offers a good sealing against dust and bacteria infiltrations and appears to be easily useable. Anyway some inconveniences were found along the bottle filling and closing lines in the cap fitting machines such as jammings of the said machines, due to the presence of the tongue projecting from the metallic foil covering the caps. Aim of said invention is to eliminate said inconveniences, providing in the meantime a sealing cap offering a whole security against dust and bacteria infiltrations and simple to be utilized. The sealing cap according to said invention shows on its upper wall a through hole which is tightly closed by a thin metallic foil covering substantially the whole cap upper wall and showing a knurled tongue, not projecting from the cap lateral edge, apt to facilite the removal. Preferably both the cap upper wall and the metallic foil inner surface are provided thermolacquered and the foil fastening around the cap takes place by welding at least along a closed line enclosing the hole provided in the cap. The welding may be conveniently executed on the whole surface of the metallic foil, except for the portion interested by the knurled tongue, so that the metallic foil completely adheres to the cap upper wall, included the knurled tongue, which, anyway, may be easily taken to remove the foil. The sealing cap of said invention is now described according to a preferred embodiment with reference to the enclosed drawings, wherein: fig. 1 is a perspective view of the sealing cap according to the invention, applied on a bottle; fig. 2 shows, in perspective too, the cap of fig. 1 during the removal of the metallic foil applied on the upper wall; fig. 3 is a section taken according to the line III-III of fig. 1. As regard to said figures, with reference 1 is generally indicated a container, in this particular instance a bottle particularly containing a powdered medicine. Onto the bottle neck 3 is applied a cap 2 by rolling its lower edge 2′ around an annular raising 3′ of the said neck. Between the cap 2 and the bottle opening is interposed a rubber sealing element 4 pressed against the said opening by the cap upper wall 5 (see fig. 3). The sealing element 4 was drawn in fig. 3 with a tubular appendix 6 entering the bottle opening with scanty clearing and provided with annular raisings 6′ apt to increase the grip; but it is evident that it may be made of a simple disk seal resting on the bottle opening, or in any other known manner. Usually, always according to the known art, and as shown in fig. 3, the seal 4 shows a thickness reduction in correspondance with the area to be pricked by the syring needle to the end to facilitate said operation. The upper wall 5 of the cap 2 shows a central through hole 7 which is subsequently covered by an aluminium foil 8. The contact surfaces between the wall 5 and the foil 8 are preferably provided thermolacquered. The application of the foil 8 to the wall 5 takes place by welding. Said welding may take place along one or more annular strips 9 peripherally surrounding the hole 7, as shown in the enclosed figures, or may interest all the contact surface between the wall 5 and the foil 8, except for the grip lunette 10, provided close to the outer outline of the foil 8, without projecting from the latter. The lunette 10 is provided with knurls 11 obtained by riveting the lunette to the end to facility the grip and the subsequent removal of foil 8. The foil 8 virtually covers the whole upper wall 5 of the cap 2 and perfectly adheres thereto, included the knurled lunette 10 which is not welded and is projecting beyond the lateral outline of the cap 2. In said manner the inconveniences encountered in the previously mentioned cap fitting machines are eliminated. The foil 8, applied on the upper wall 5 of the cap 2 constitutes an excellent sealing element as regards to the underlaying seal 4, and may be easily removed to release the hole 7 exerting a suitable traction on the grip lunette 10.

Claims: 1. A sealing cap of metallic material, such as aluminium, particularly for antibiotic, infusion and transfusion bottles, provided with a hole (7) on its upper wall (5), said hole (7) being tightly closed by a metallic foil (8) substantially covering the whole wall (5) and characterized in that the said foil (8) is provided with a knurled grip lunette (10) not projecting beyond the outline of the cap (2). 2. A sealing cap according to claim 1, characterized by the fact that the contact surfaces between the upper wall (5) of the cap (2) and the metallic foil (8) are provided thermo-lacquered. 3. A sealing cap according to claim 1 or 2, characterized by the fact that the application of the metallic foil (8) to the cap upper wall (5) takes place by welding along at least a continuous closed strip (9) externally embracing the hole (7) provided in the wall (5). 4. A sealing cap according to claim 1 or 2, characterized by the fact that the application of the foil (8) to the upper wall (5) of the cap (2) takes place by welding all over the contact surface between said elements, except for the area interested by said grip lunette (10).

Inventors: RIZZARDI, NAPOLEONE
Applicants: CAPSULIT S.P.A.
Application year: 1989
Main classification: B65D51
IPC codes: A61J1, B65D51