AMPOULE PACKAGE

Abstract: Ampoule package in which a stem of an ampoule (1) is wrapped with a heat-shrinkable film (2), the aforesaid ampoule package being characterized in that at least a constriction (4) of the ampoule is covered with a lower portion of the heat-shrinkable film (2). According to the ampoule package of the present invention, glass fine pieces (6) of the ampoule neither go into an ampoule nor scatter around it at the time of cutting, and it is unnecessary to care about a wound and injury in cutting the ampoule.

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ampoule package, and more specifically to an ampoule package which is devised to prevent the introduction of fine pieces of glass into an ampoule and to handle the ampoule without the danger of getting any wound and injury. 2. Description of the Prior Art When an ampoule containing a medicine or the like is used, a shallow hurt is given on a constriction of the ampoule, and a cap portion of the ampoule is then separated from a body portion thereof by an applied force. By such a separation process, however, fine pieces of glass may be formed and get into the ampoule. Subsequently, when the medicine or the like is drawn up from the ampoule by a syringe or the like, the pieces of glass may be drawn up as well and injected into a patient together with the medicine which may give rise to serious problems for the patient. Hence, for the purposes of Hence, for the purposes of inhibiting the formation of fine pieces of glass and facilitating the cutting of the ampoule, new ampoules such as one-point ampoules, easy-cut ampoules, tungsten-cut ampoules have been contrived. Although such new ampoules can achieve the easy cutting, the problems regarding the formation of the glass fine pieces and the safty at the time of the cutting still remain. As a next attempt to solve this problem, there has been suggested a method in which an internal pressure in the ampoule is adjusted to be possitive when the ampoule containing a liquid is meltingly sealed, whereby the pieces of glass can fly off outward when the ampoule is cut. In such a method, however, it is difficult to control the internal pressure, which fact impedes putting it into practice. In addition, since the fine pieces of glass scatter around the ampoule which is now being cut, this method is also unsuitable from the viewpoint of environmental health. Moreover, when opening an ampoule a person may be wounded on the finger, or the person has to carefully operate to prevent injuring, so that the working efficiency may be deteriorated. The person even might be infected with bacteria or virus through the wound in a hospital. In short, the above-mentioned method gives rise to a serious danger. On the other hand, another ampoule has been suggested which is wrapped with a heat shrunk heat shrink film so as to protect the ampoule. However, when such an ampoule is cut, a constriction of the ampoule is exposed, and no measure is taken to prevent the problems arising from the pieces of glass formed during cutting. Therefore, the person cannot be protected from the danger of being injured when cutting the ampoule, and the pieces of glass cannot be prevented from flying about and from getting into the ampoule. US-A-3 552 083 realtes to a sealed ampoule as an apparatus for storing volatile liquid substances. The ampoule is provided with a resilient stopper having self-sealing properties in a narrow neck portion which forms the breakage line after the breakoff of the top of the ampoule. The amploule may be placed in a protective flexible sleeve made of vinylic rubber in order to prevent damages emerging from the sharp edges or spikes of glass resulting from the breaking off of the top of the ampoule. Further, US-A-3 749 271 discloses a glass ampoule being heat-sealed at the upper end of the cap portion and having a necked-down annular break line formed adjacent to, but spaced from the sealed end and seperating the cap portion from the body portion of the ampoule. A plastic cap having two spaced annular sealing rings formed on an inner wall is pressed on the sealed end so that the break line is located between the spaced sealing rings. Although these known ampoules mentioned above protect the thumb from injury during the opening process, they still have the disadvantage that fine pieces of glass may easily fall into the ampoule. This effect is even increased by the morphologies of the sealing films, because the sealing films keep the ampoule packages closed immediately after cutting the ampoules, thereby preventing the fine pieces of glass from falling out of the ampoules, but facilitating them falling into the ampoules. SUMMARY OF THE INVENTION The present invention intends to overcome the above-mentioned drawbacks of the conventional techniques, and thus an object of the present invention is to provide an ampoule package in which fine pieces of glass neither get into an ampoule nor scatter around when the ampoule is cut, and in which it is unnecessary to care about a wound. The object is complied with by an ampoule package according to claim 1. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a sectional view illustrating one embodiment of an ampoule package according to the present invention; Fig. 2 is a perspective view of films capable of being heat shrunk used in the present invention; Figs. 3 to 5 are sectional views illustrating other embodiments of the ampoule packages according to the present invention; Fig. 6 is a sectional view illustrating the state when the ampoule has been cut; Fig. 7 is a perspective view illustrating the state after the ampoule has been cut; Fig. 8 is an enlarged view illustrating fine pieces of glass which adhere to the inside surface of the umbrella-like heat shrunk heat shrink film; and Fig. 9 is a graph showing the effect of preventing the introduction of fine piece of glass into the ampoule on the basis of experimental results. DESCRIPTION OF THE PREFERRED EMBODIMENT An ampoule package of the present invention can be applied to all of ampoules (easy-cut ampolues and tungsten-cut ampoules) which can be cut in any direction and other ampoules (one-point ampoules) which can be cut in one direction. The heat shrunk heat shrink film which is used in the present invention can be selected from a polyvinyl chloride film, a polypropylene film, a polystyrene film, a polyethylene film, and raw materials for these films can also be chosen from an extensive range of materials. Therefore, a colorless or a colored material can be employed in compliance with a desired application. In particular, if the several colored heat shrunk heat shrink films are suitably used, some kinds of ampoule contents can be distinguished from one other by the colored films wrapped around the respective ampoules. In addition, if a film is used which has been coated with an ink having light-screening characteristics or colored with a pigment having light-screening characteristics, the contents in the ampoules can be protected from decomposition and deterioration in quality. Further, by affixing symboles to the films such as an asterisk, an abbreviation, polka dots, straight lines which are distinctive even when deformed, it is also possible to give a distinction to the ampoules. Now, the present invention will be described in detail as an embodiment in reference to accompanying drawings. Fig. 2 is a perspective view showing films capable of being heat shrunk used in the present invention, and these films include a heat shrunk heat shrink film 3 for wrapping a body portion of an ampoule and another heat shrunk heat shrink film 2 for wrapping a cap portion of the ampoule having a smaller diameter. Each cylindrical film shown in Fig. 2 is formed by sticking the opposite edges of one film sheet on each other, but another type film, for example, a tube-like film which has been previously formed may be used. Fig. 1 is a sectional view illutrating one exemplary ampoule package of the present invention, and the cap portion of the ampoule 1 is wrapped with a heat shrunk heat shrink film 2 so that a constriction 4 of the ampoule is covered with the lower portion of the heat shrunk heat shrink film 2. Examples of shrink-wrapping morphologies include a structure of Fig. 1, another structure of Fig. 3 in which the body portion of the ampoule is wrapped with a heat shrunk heat shrink film 3 for body wrapping prior to wrapping the cap portion, and other structures of Figs. 4 and 5 in which upper portions of the film members are cut off to expose the upper portions of the cap portions. It should be noted that in every structure, the constriction of the ampoule is covered with the lower portion of the heat shrunk heat shrink film 2. The top of the cap portion of the ampoule may be exposed as shown in Figs. 1, 3 to 5 but may be covered with the heat shrunk heat shrink film having a shape which conforms to that of the top portion. For example, when it is intended to increase the working efficiency, shrink wrapping may be carried out by the use of a film being slightly larger than the cap portion, and the spare film on the top of the cap portion of the ampoule may be crushed into a flat shape, followed by cutting off the flat top spare film therefrom in the form of a curve. Incidentally, a length of the lower portion of the heat shrunk heat shrink film 2, i.e. a length of the film of from the constriction towards the bottom end of the ampoule is preferably within the range of 2 to 4 mm from the viewpoints of an effect to the removal of pieces of glass and a working efficiency. Fig. 6 is a sectional view illustrating the state when the ampoule has been cut, and the formed glass pieces 6 adhere to an umbrella-like lower portion 5 of the heat shrunk heat shrink film 2 for cap wrapping due to the fact that the heat-shrinkable film and the glass of the ampoule have different electrostatic properties, whereby the fine pieces of glass getting the ampoule and scatter around the ampoule are remarkably decreased. Further, as shown in Fig. 7, a cut surface 7 in the constriction of the ampoule is concealed in the heat shrunk heat shrink film 2 for cap wrapping, and in addition, since immediately after the cutting, the umbrella-like portion of the film is brought into contact with a cut surface 8 of the body portion of the ampoule, any fingers of a person which opens the ampoule do not contact with the cut surfaces of the cap and the body portions of the ampoule and therefore there is no necessity to care about a wound. A questionnaire on the occurrence of wounds was made, and the following results were obtained: In 59 hospitals, 1262 nurses were examined. As a result, the number of the nurses which were wounded by unwrapped ampoules in a period of 6 months was 638 (50.55%), whereas none of them had any wound, when the ampoules of the present invention were used. In consequence, the number of the nurses which appreciated the wound prevention effect of the present invention was 1110 (87.96%). In other words, the excellence of the ampoules according to the present invention was admitted by most of the nurses. Furthermore, the ampoules of the present invention were also evaluated to be excellent in easiness of provision and handling. In order to take precautions against the infection of, for example, a disease of AIDS virus for which any therapy has not been established yet, it is necessary to take care of all infectious factors. Also in this sense, the ampoules of the present invention which have the high wound prevention effect are highly useful. Next, for the purpose of clarifying the effect of preventing the introduction of fine pieces of glass into the ampoule by the ampoule package of the present invention, same kinds of ampoules which have been packed with the same liquid under the same conditions are first prepared. For comparison, one of the thus prepared ampoules is wrapped with the heat shrunk shrink film and another thereof is not wrapped. Then, both the ampoules are cut under the same conditions, and the amount of fine pieces of glass introduced into the respective ampoules are measured. That is, tungsten-cut ampoules were first packed with distilled water for injection and were meltingly sealed, and one group of the ampoules was then wrapped with a heat-shrinkable film, so that the shrink-wrapped ampoules according to the present invention on the one hand, and the unwrapped ampoules on the other hand, i.e. the conventional ampoules were prepared. Each ampoule was cut in a clean bench, and then the number of fine pieces of glass in the ampoule was counted by the use of an automatic liquid type particle counter (Rion Co., Ltd.; KL-01) disposed in the clean bench. The results obtained are set forth in Table 1 and in Fig. 9. In this case, the number of fine pieces of glass is per 5 mℓ ampoule and is an average value of the 20 ampoules. Specimen Number of Specimens Number of Fine Pieces of Glass Diameter of Piece (µm) 1-2 2-5 5-10 10-20 20< Conventional Ampoule 20 901 317 88 13 0 Shrink-Wrapped Ampoule 20 198 57 9 0 0 As described above, the ampoule package of the present invention is constituted so that the umbrella-like lower portion of the heat shrunk heat shrink film 2 for cap wrapping may extend below the cap portion of the ampoule to cover at least the constiriction of the ampoule therewith. Therefore, the fine pieces of glass formed during the cutting of the ampoule adhere to the inside surface of the umbrella-like heat shrunk heat shrink film 2 due to the fact that the heat-shrinkable film and the glass of the ampoule have different electrostatic properties, whereby the fine pieces of glass are prevented from flying about. In consequence, the fine pieces of glass which get into the ampoule and which fly about are remarkably decreased. The above-mentioned different electrostatic properties of the materials of the heat-shrinkable film and the ampoule can be caused by applying different electrostatic potentials to the glass of the ampoule and a synthetic resin of the heat shrink film. In Fig. 6, the umbrella-like portion 5 of the film is electrified to (-), and to this portion, the fine pieces of glass 6 are electrified to (+) in order to adhere to the heat shrink film. According to the present invention, the following functional effects can be obtained: (1) When the ampoule is cut, the fine pieces of glass adhere to the inside surface of the extended umbrella-like first portion of the heat shrunk heat shrink film for cap wrapping with the aid of the static electrification which occurs at the time of the cutting. Therefore, the effect of preventing the introduction of pieces of glass into the ampoule is great. Further, the scattering of fine pieces of glass can also be mostly prevented, which is beneficial from the viewpoint of environmental health. (2) When the ampoule is cut, any fingers of a person are not wounded, and the deterioration in working efficiency, which is attributable to being careful not to be wounded, can be prevented. Furthermore, doctors and nurses are protected from the infection with bacteria or virus through a wound in a hospital. (3) When the body portion of the ampoule is also shrink-wrapped with the heat-shrinkable film, the breakage of the ampoules during handling them is decreased, since each ampoule is entirely wrapped with the heat shrunk heat shrink film. In addition, the ampoule liquids can be indicated on the outside surface or the inside surface of the heat shrink film, which is preferable from the viewpoint of administration.

Claims: An ampoule package comprising an ampoule with a body portion, a cap portion and a constriction portion (4) therebetween, characterized in that a first portion (5) of a heat shrunk heat shrink film (2) covers said constriction portion and a second portion of said heat shrunk heat shrink film (2) covers at least a part of the cap portion; and in that the materials of the heat shrink film and the ampoule have different electrostatic properties. An ampoule package according to claim 1, wherein the body portion of said ampoule is previously shrink-wrapped with a second heat shrunk heat shrink film (3) for body wrapping, thereby not covering said constriction (4) of said ampoule; and whereby the lower portion of said first heat shrink film (2) overlies at least a portion of said second heat shrink film (3). A method for preventing the introduction of fine pieces of glass into the ampoule of the ampoule package according to claims 1 or 2, whereby different electrostatic potentials are applied to the heat shrink film and the ampoule.

Inventors: ABIKO, KENJI C/O TOHOKU FACTORY, ANZAI, NOBORU C/O TOHOKU FACTORY, TAKAHASHI, KENICHI C/O TOPPAN PRINTING CO., LTD., WATANABE, YOSHIO C/O TOHOKU FACTORY
Applicants: MECT CORPORATION, TOPPAN PRINTING CO., LTD.
Application year: 1987
Main classification: A61J1
IPC codes: B65D41, A61J1