ADHESIVE BANDAGE

Abstract: An adhesive bandage, comprising an adhesive tape (1), an absorbent pad (2) carried by the tape and a release sheet (4), releasably attached to the tape on the side of the adhesive, wherein said absorbent pad (2) is smaller in its length than the tape (1) and said release sheet (4) is overlaying the whole pad, said bandage further comprising a blister portion (6) having an open side facing the pad, formed on the release sheet, a medi­ cine (3) contained in the blister, and a medicine covering film (5) interposed between the medicine and the pad for sealing the medicine in the blister, said film being rupturable under pressure, characterized in that the medicine (3) is encapsu­ lated into a capsule (8) placed in the blister (6).

Description: ADHESIVE BANDAGE BACKGROUND OF THE INVENTION 1. Field of the Invention This Invention relates to an adhesive bandage. 2. Description or the Prior Art It is already known by US-A-3297032 (Fig. 5), an adhesive bandage comprising an adhesive tape, an absorbent pad carried by the tape and a release sheet, releasably attached to the tape on the side of the adhesive, wherein said absorbent pad is smaller in its length than the tape. Said release sheet is overlaying the whole pad, said bandage further comprising a blister having an open side facing the pad, formed on the release sheet, a medicine contained in the blister, and a medicine covering film interposed between the medicine and the pad for sealing the medicine in the blister. Said film is rupturable under pressure for causing the medicine in the blister to impregnate the pad. US-A-3580254 and US-A-2714382 illustrate other bandages of that kind, comprising an adhesive tape and a absorbent pad or the like with a release able protecting element. SUMMARY OF THE INVENTION It is an object of this invention to provide an adhesive bandage having a pad to which a fresh medicine is supplied when it is applied to a local site of the body. It is another object of this invention to provide an adhesive bandage holding a medicine in such a manner that its effect may not be lost for a long time. It is still another object of this invention to provide an adhesive bandage which can be applied to a wound without hurting it or giving rise to a pain. It is a further object of this invention to provide an adhesive bandage in which the medicine maintains its effects, for a prolonged period, for achieving any desired sterilizing, disinfecting and curing purposes. According to invention, the adhesive bandage comprising an adhesive tape, an absorbent pad carried by the tape and a release sheet, releasably attached to the tape on the side of the adhesive, wherein said absorbent pad is smaller in its length than the tape and said release sheet is overlaying the whole pad, said bandage further comprising a blister portion having an open side facing the pad, formed on the release sheet, a medicine contained in the blister, and a medicine covering film interposed between the medicine and the pad for sealing the medicine in the blister, said film being rupturable under pressure, is characterized in that the medicine is encapsulated into a capsule placed in the blister. Other objects and features of the present invention will be more apparent to those skilled in the art on consideration of the accompanying drawings and following specification wherein are disclosed several exemplary embodiments of the invention with the understanding that such variations, modifications and elimination of parts may be made therein as fall within the scope of the appended claims without departing from the spirit of the invention. Figure 1 is a top plan view of an adhesive bandage according to the invention Figure 2 is a sectional view of the embodiment taken along the line A-A' of Figure 1 Figure 3 is a cross sectional view of a capsule in the adhesive bandage of this invention Figures 4 and 5 are sectional views of blisters according to further embodiments of this invention ; and Figures 6 and 7 are sectional views of further embodiments of this invention. DETAILED DESCRIPTION OF THE INVENTION The adhesive bandage of this invention comprises an adhesive tape carrying a pad thereon, and a release sheet holding a medicine separately from the pad. The invention will be described in more detail by way of example with reference to the drawings. Referring first to Figures 1 and 2, an adhesive bandage embodying this invention comprises an adhesive tape 1 carrying a pad 2 thereon, and a medicine 3 enclosed in a capsule 8 as hereinafter described. The release sheet 4 may be provided at one end with a slit 7 along which the release sheet 4 may be bent so that is may be easily removed. An appropriate quantity of the medicine is put into the capsule 8, itself placed in a blister (recess) formed at a predertermined position of the release sheet 4. The adhesive bandage of this inventionm may contain various kinds of medicines, for example, a sterilizer or disinfectant, a wound astringent healing promoter, a hemostatic agent, an anti-inflammatory agent, an antihistaminen, and a local anesthetic. Specific examples of the sterilizer or disinfectant include chlorhexidine gluconate, benzalkonium chloride, chloroxyl#nol, acrinol, thianthol, dequalinium chloride, sulfisomidine, sulfamine, nitrofurazone, boric acid, homosulfamine, and triclocarban. Examples of the healing prmoter include zinc oxide, pyridoxine hydrochloride, tocopherol acetate, and pyridoxine dipalmintate. Examples of the hemostatic agent include naphazoline hydrochloride, zinc sulfate, and ephedrine hydrochloride. Examples of the anti-inflammatory agent include steroids such as prednisolone, dexamethasone, cortisone acetate and other steroids, glycyrrhetinic acid, and lysozyme chloride. Examples of the atihistamine include chlorophenilamine maleate and diphenhydramine hydrochloride. Examples of the local anesthtetic include lidocaine, ethyl aminobenzoate, procaine hydrochloride, dibucaine hydrochloride, tetracaine hydrochloride, and diethyl aminoethyl p-butylaminobenzoate hydrochloride. These medicines may be used singly or in combination depending upon intended purposes. They may be in the form of a solution, cintments, grease or powder, or any other form as long as they are fluid. If appropriate, a solution may be absorbed into carrier such a sponge or cotton and thereafter enclosed in the blister. The adhesive tape may be of any ordinary material and constructions and preferably it is porous. If required, the adhesive tape may have a recessed center to place the pad, and a waterproof rear surface which is obtained by any customaty method. The pad may be formed from absorbent cotton or any other type of cotton, an unwoven fabric, parper, sponge, or any other liquid-absorbent material. When a large bandage is required, a plurality of blisters may be provided for one pad. The capsule 8 (Fig. 3) is formed from gelatin, or any other pharmaceutically acceptable film forming material that does not react with the medicine. The form of the capsule may be selected depending on the desired purpose and it may be, for example, sphere, cylinder, cone or square column. In order to be placed in a gelatin capsule, the medicine is usually dissolved or suspended in a vegetable oil, such as sesame, peanut or olive oil. The medicine does not necessarily need to be in the form of a solution, but may be in the form of an ointment, grease or powder, or any other form if it is free Plowing. The use of a solution is, however, nost desirable when the medicine is placed in the capsule. When the bandage is to be applied to a wound, a finger pressure is applied to the blister 6 to rupture the capsule 8 to cause the medicine to flow from the capsule to the pad. Then, the release sheet 4 is bent along its slit 7, and removed from the adhesive tape 1, whereby the pad 2 holding a fresh supply of medicine is exposed for application to the wound. The same advantages as described above can be achieved by the bandage of this type. The medicine does not lose its effect during the storage of the bandage, since it is enclosed in the capsule immediately before the use of the bandage. The pad can be applied to the wound without hurting it and give rise to a pain, since it is wetted with the medicine immediately prior to its application. The medicine can maintain its efficacy for a prolonged period for achieving any desired sterilizing, difinfecting and curing purposes. And also the bandage permits the visual observation of the medicine if the capsule and the blister portion are transparent. The bandage may have a plurality of capsules depending on the sizes of the pad and the bandage. When the capsule 8 is ruptured, its fragments adhere closely to the inner wall surface of the blister, and do not remain on the pad, if the blister is provided with an irregular or uneven inner surface. Even if any fragment of the capsule material may be left on the pad, it does not give rise to any problem if the capsule is formed from pharmaceutically acceptable material such as gelatin. If desired an adhesive may be applied on the inner surface of the blister so as to remove the ruptured capsule attaching to the release sheet. Modified forms of the blister are shown in Figures 4 and 5. Figure 4 shows a blister having the shape of a superior arc, while the blister shown in Figure 5 has the shape of a modified superior arc. These modified blisters are effective for presenting any capsule material from falling on the pad after rupture of the capsule. The blister shown in Figure 4 has an opening 10 which is smaller than the diameter of the capsule, but this feature is not required as for the blister having a modified superior arc profile as shown in Figure 5. Further, as shown in Figure 6, a screen 11 or the like may be introduced between the capsule 8 and the pas 2 to facilitate the puncture of the capsule and the removal of the capsule fragments. The screen may be wire mesh, plastic mesh, cloth etc. Although the above explanation is made on the embodiments in which the capsule is incorporated into the blister portion in manufacturing the bandage, the invention can be also applied to such adhesive bandage that an encapsulate medicine is stored in the state that it is disengaged from the blister portion and that it is incorporated into the blister portion when use. That is, as shown in Figure 7, the encapsulated medicine is detached from the blister portion during storage, and when the bandage is applied to a wound, the encapsulated medicine is inserted into the blister portion.

Claims: CLAIMS 1. An adhesive bandage, comprising an adhesive tape (1), an absorbent pad (2) carried by the tape and a release sheet (4), releaseably attached to the tape on the side of the adhesive, wherein said absorbent pad (2) is smaller in its length than the tape (1) and said release sheet (4) is overlaying the whole pad, said bandage further comprising a blister portion (6) having an open side facing the pad, formed on the release sheet, a medicine (3) contained in the blister, and a medicine covering film (5) interposed between the medicine and the pad for sealing the medicine in the blister, said film being rupturable under pressure, characterized in that the medicine (3) is encapsulated into a capsule (8) placed in the blister (6). 2. An adhesive bandage as claimed in Claim 1, characterized in that the capsule is made from gelatin. 3. An adhesive bandage as claimed in Claim 1, characterized in that the medicine is dissolved into or suspended oil selected from the group substantially consisting of sesame, peanut and olive oil. 4. An adhesive bandage as claimed in Claim 1, characterized in that the blister portion is designed in a form of superior arc or modified superior arc. 5. An adhesive bandage as claimed in Claim 1, characterized in that the capsule is designed in a form of sphere, cylinder, cone or square column. 6. An adhesive bandage as claimed in Claim 1, characterized in that a screen is interposed between the pad and the capsule. 7. An adhesive bandage as claimed in Claim 1, characterized in that the medicine is selected from the group substantially consisting of sterilizer, disinfectant, wound astringent healing promoter, hemostatic agent, anti-inflammatory agent, antihistamine and local anesthetic. 8. An adhesive bandage as claimed in Claim 1, characterized in that the release sheet is provided with a slit at one end thereof. 9. An adhesive bandage as claimed in Claim 1, characterized in that the medicine is in a form of solution. 10. An adhesive bandage as claimed in Claim 1, characterized in that the medicine is in a form of ointment. 11. An adhesive bandage as claimed in Claim 1, characterized in that the medicine is in a form of grease. 12. An adhesive bandage as claimed in Claim 1, characterized in that the medicine is in a form of powder. 13. An adhesive bandage as claimed in Claim 1, characterized in that the pad is made from a material selected from the group substantially consisting of absorbent cotton, unwoven fabric, paper and sponge. 14. An adhesive bandage as claimed in Claim 1, characterized in that the blister portion is designed in a form selected from the group substantially consisting of spere, ellipse, and rectangle. 15. An adhesive bandage as claimed in Claim 1, characterized in that plurality of blisters facing a single pad. 16. An adhesive bandage as claimed in Claim 1, characterized in that the blister portion and/or the capsule is transparent.

Inventors: KONISHI, RYUSAKU
Applicants: NIPPON ZOKI PHARMACEUTICAL CO. LTD.
Application year: 1982
Main classification: A61F13
IPC codes: A61L15, A61F13