An applicator for a fluid having a porous membrane

Abstract: An applicator (1) for applying a fluid such as eye shadow. The applicator comprises a tubular core (4) having a conduit (6), and a porous outer membrane (5) arranged to cover the tip of the tubular core (4). The outlet (7) of the conduit (6) of the tubular core (4) is formed so that the outlet (7) opens in the tubular core (4) on one side of the tubular core (4) from the longitudinal axis of the tubular core (4). Therefore, it is possible to apply a fluid to a surface, such as skin of a human being, by using one side of the applicator through which the fluid easily soaks, and to spread and gradate the fluid on the surface, by using the other side of the applicator. The outer membrane (5) may be made from two or three porous sheet members having different porosities from each other, so that a fluid easily soaks through one of the porous sheet members having a relatively large porosity.

Description: Background of the invention 1. Field of the Invention The present invention relates to an applicator for applying a fluid according to the preamble of claim 1, for example, a fluid cosmetic such as a liquid eye shadow. 2. Description of the Related Art A known applicator for applying a fluid comprises a tubular core for introducing a fluid from a reservoir and discharging the fluid from an outlet arranged at the distal end of the applicator, and an elastic porous outer membrane, such as urethane foam permeable to a fluid, in the shape of a bag, covering the tip portion of the tubular core (US-A-4 002 182). In the conventional applicator, a fluid uniformly soaks through an aperture of the outer membrane, arranged through the applicator's longitudinal axis. The upper part of the tubular core is formed by cutting out a portion of said tubular core along a plane inclined to the longitudinal axis. This arrangement is disadvantageous since the tip of the tubular core comprises a sharp edge along the outer periphery of the rounded tip along the flat surface, which may cause harm to the outer membrane when the applicator is used. Furthermore, the outer membrane of the known applicator has a complicated geometrical shape in order to match with the tubular core. In an actual operation for applying a cosmetic to a skin of a human being, it is necessary to spread and graduate the cosmetic after the cosmetic is applied to the skin. The conventional applicator is not adapted to carry out these operations because a fluid uniformly soaks through the substantially entire area of the top of the outer membrane, and it is disadvantageous and inevitable that a finger or a brush or else must be used for spreading and graduating the cosmetic. SUMMARY OF THE INVENTION The object of the present invention is to provide an applicator for applying a fluid, which is easily constructed and can be used not only for applying a fluid to a surface but for spreading and graduating the fluid on the surface. According to the present invention, there is provided an applicator for applying a fluid comprising a tubular core having a longitudinal axis, a generally rounded tip, a generally rounded tip, and a conduit extending along the longitudinal axis, the conduit having an inlet adapted to receive a fluid and an outlet; a porous outer membrane permeable to a fluid and arranged to cover at least a portion of the tubular core including the outlet of the conduit; wherein the outer membrane includes an aperture and wherein the outlet of the conduit of the tubular core is formed by cutting out a portion of the tubular core along a plane inclined to the longitudinal axis. In order to meet the object mentioned before, the cut out portion of the tubular core is arranged on one side of the longitudinal axis only, the surface of the other side of the tubular core is rounded, the aperture is provided on one side of the tubular core corresponding to the side where the outlet is formed, and the aperture is inclined to the longitudinal axis of the tubular core. In this arrangement, the fluid mainly soaks through one side of the elastic outer membrane, since the outlet of the conduit opens on one side of the tubular core. Therefore, it is possible to apply a fluid to a surface, such as a skin of a human being, by using one side of the applicator through which the fluid easily soaks, and to then spread and gradate the fluid on the surface, by using the other side of the applicator through which the fluid does not soak well. Preferably, a recess is arranged in the conduit of the tubular core near the outlet for holding a fluid therein. Preferably, the tubular core is formed in a generally oval cross-section having a pair of opposite larger curvature portions and a pair of opposite smaller curvature portions between the larger curvature portions, and the outlet of the conduit opens to one of the larger curvature portions. Preferably, the applicator comprises a barrel having a reservoir adapted to contain a fluid therein, and the tubular core is attached to the barrel so that the inlet of the conduit receives a fluid in the reservoir. A piston is arranged in the reservoir of the barrel, and actuating means is provided for actuating the piston to discharge a fluid in the reservoir through the conduit of the tubular core. Preferably, the actuating means comprises a manually operable member which can be rotatably operated to push the piston. Ratchet means is preferably provided to allow the manually operable member to rotate in one direction only. Preferably, the barrel comprises a main barrel and an end barrel attached to the main barrel, the tubular core being attached to the main barrel with the end barrel enclosing the tubular core so that a portion of the outer membrane covering the outlet of the conduit projects from the end barrel. Preferably, the outer membrane is pinched between the tubular core and the end barrel. In this case, the tubular core has an externally projecting annular shoulder, and the end barrel has an internally projecting annular shoulder arranged in the opposite sense to the externally projecting annular shoulder of the tubular core, whereby the outer membrane can be piched by the externally projecting annular shoulder of the tubular core and the internally projecting annular shoulder of the end barrel. In addition to the externally and internally projecting annular shoulders, or independently of the shoulders, it is preferable that the tubular core has at least one external annular projecting, and the end barrel has at least one internal annular projection at a position axially offset from the at least one external annular projection; or the tubular core has at least one external annular projection, and the end barrel has at least one internal annular projection at a position axially overlapping the at least one external annular projection. By these shoulders and/or projections, the outer membrane can be more reliably fastened to the tubular core without other fastening means. Preferably, the outer membrane comprises at least two porous sheet members having different porosities from each other. One of the at least two porous sheet members having a larger porosity is arranged to cover the outlet, and the other porous sheet member is arranged on the other side of the outer membrane. Alternatively, the outer membrane comprises three porous sheet members, the first of three porous sheet members is arranged on said one side of the outer membrane to cover the outlet, and the second and the third of three porous sheet members are arranged on the other side of the outer membrane with the third porous sheet member covering the second porous sheet member, the third porous sheet member having the smallest porosity. Preferably, the outer membrane has a small aperture on one side of the outer membrane corresponding to the side of the tubular core where the outlet is formed, to assist the soaking of the fluid through the outer membrane. BRIEF DESCRIPTION OF THE DRAWINGS The present invention will become more apparent from the following description of the preferred embodiments, with reference to the accompanying drawings, in which: Fig. 1 is a cross-sectional view of the applicator embodiment of the present invention; Fig. 2 is an enlarged cross-sectional view of a portion of the applicator of Fig. 1; Fig. 3 is an exploded perspective view of the barrel of the applicator and elements housed in the barrel of Figs. 1 and 2; Fig. 4 is a perspective view of the applicator of Fig. 1; Fig. 5 is a cross-sectional view of the tubular core of Fig. 1; Fig. 6 is a front view of the tubular core of Fig. 5, viewed from the arrow VII in Fig. 5; Fig. 7 is a cross-sectional view similar to Fig. 5, but illustrating the tubular core of the first modified example; Fig. 8 is a front view of the tubular core of Fig. 7; Fig. 9 is a cross-sectional view similar to Fig. 5, but illustrating the tubular core of the second modified example; Fig. 10 is a front view of the tubular core of Fig. 9; Fig. 11 is a cross-sectional view similar to Fig. 5, but illustrating the tubular core of the third modified example; Fig. 12 is a front view of the tubular core of Fig. 11; Fig. 13 is a cross-sectional view similar to Fig. 5, but illustrating the tubular core of the fourth modified example; Fig. 14 is a front view of the tubular core of Fig. 15; Fig. 15 is a cross-sectional view similar to Fig. 5, but illustrating the tubular core of the fifth modified example; Fig. 16 is a front view of the tubular core of Fig. 15; Fig. 17 is a perspective view of the tubular core of Fig. 15; Fig. 18 is a cross-sectional view similar to Fig. 5, but illustrating the tubular core of the sixth modified example; Fig. 19 is a front view of the tubular core of Fig. 18; Fig. 20 is a cross-sectional view similar to the Fig. 5, but illustrating the tubular core of the seventh modified example; Fig. 21 is a front view of the tubular core of Fig. 20; Fig. 22 is a cross-sectional view similar to Fig. 5, but illustrating the tubular core of the seventh modified example; Fig. 23 is a front view of the tubular core of Fig. 22; Fig. 24 is a cross-sectional view similar to Fig. 5, but illustrating the tubular core of the eighth modified example; Fig. 25 is a front view of the tubular core of Fig. 24; Fig. 26 is a perspective view of the tubular core of Fig. 24; Fig. 27 is a plan view of the tubular core of the ninth modified example; Fig. 28 is a front view of the tubular core of Fig. 27; Fig. 29 is a cross-sectional view of the tubular core of Fig. 27; Fig. 30 is a cross-sectional view of a portion of the modified applicator, including means for fastening the outer membrane to the tubular core; Fig. 31 is a cross-sectional view of a portion of the modified applicator; Fig. 32 is a cross-sectional view of a portion of the modified applicator. DESCRIPTION OF THE PREFERRED EMBODIMENTS Fig. 1 to 3 show the applicator 1 having an end portion 1a for applying a fluid according to the first embodiment of the present invention. As shown in Figs. 1 and 2, the applicator 1 comprises a barrel including a main barrel 2 having a reservoir 12 for containig a fluid such as cream eye shadow therein and an end barrel 3 firmly secured by main barrel 2. The end portion 1a of the applicator 1 comprises a tubular core 4 having a conduit 6 extending along the longitudinal axis of the tubular core 4, and an elastic porous outer membrane 5 covering the tip of the tubular core 4 of the tubular core 4. The tubular core 4 has an inlet 6a and an outlet 7, and is attached to the main barrel 2 so that the inlet 6a of the conduit 6 receives a fluid in the reservoir 12. The end barrel 3 encloses the outer membrane 5 so that the tip of the outer membrane 5 projects from the end barrel 3. It is possible to detachably arrange a cap (not shown) on the end barrel 3 to protect the outer membrane 5. The tubular core 4 has a tip in a generally rounded shape. The tip of the tubular core 4 is cut out along a plane 4a inclined to the longitudinal axis of the tubular core 4, so that the outlet 7 of the conduit 6 opens on one side of the tubular core 4 from the longitudinal axis thereof. The outer membrane 5 is made from a porous material in the form of a bag. The outer membrane 5 comprises three porous sheet members 8 to 10. The first porous sheet members 8 comprises a urethane foam having a relatively large porosity and constitutes one half of the outer membrane 5 arranged on one side of the outer membrane 5 so as to cover the outlet 7 of the conduit 6 of the tubular core 4. The third porous sheet member 10 covers or overlaps the second porous sheet member 9, and the second and third porous sheet members 9 and 10 constitute one half of the outer membrane 5 arranged on the outer side of the outer membrane 5. The second porous sheet member 9 comprises a urethane foam having a porosity generally identical to that of the first porous sheet member 8 and the third porous sheet member 10 comprises a urethane foam having a relatively small porosity and thus a high density so that a fluid does not easily soak through the third porous sheet member 10. The third porous sheet member 10 is adhered to the second porous sheet member 9 by heating and welding adjoining portions of the second and third porous sheet members 9 and 10 together. The first porous sheet members 8 is adhered to the second and third porous sheet members 9 and 10 by heating and welding adjoining portions thereof together. In addition, the first porous sheet member 8 allowing a fluid to soak therethrough bears a different color from a color of the third porous sheet member 10 not allowing a fluid to soak therethrough, so that a user can visually recognize one from the other. For example, the first porous sheet member 8 is colored black, and the third porous sheet member 10 is colored white. The three porous members 8 to 10 are made from the same kind of material in this embodiment, but it is possible to make the three porous sheet members 8 to 10 from different materials other than a urethane foam. For example, silicone sponge, NBR sponge, non-woven fabric, felt, woven fabric and paper can be used for the porous sheet members 8 to 10. The outer membrane 5 can be formed from a plurality of porous sheet members 8 to 10 having different porosities, as described above, but it is possible to form the outer membrane 5 from a single porous material through which a fluid can soak. When the outer membrane 5 is formed from a plurality of porous sheet members, it is not necessary that a material for the third porous sheet members 10 is more permeable that the first and second porous sheet members 8 and 9. A small aperture 11 is provided in the first porous sheet member 8 of the outer membrane 5 so that a fluid can soak through the first porous sheet members 8 via the small aperture 11. The small aperture 11 opens toward the outlet 7 of the conduit 6. The small aperture 11 can be provided by piercing a pin in the first porous sheet member 8 to break a portion of the member 8 to form a hole, or by piercing a hot pin in the first porous sheet member 8 to dissolve a portion of the member 8 to form a hole. Accordingly, a fluid can soak through both the small aperture 11 and the porous wall of the first porous sheet member 8 of the outer membrane 5. A fluid can soak through the small aperture 11 when the porous wall of the first porous sheet member 8 of the outer membrane 5 is clogged. The outer membrane 5 is pinched between the tubular core 4 and the end barrel 3. In particular, the tubular core 4 has an externally projecting annular shoulder 33, and the end barrel 3 has an internally projecting annular shoulder 34 arranged in the opposite sense to the externally projecting annular shoulder 33 of the tubular core 4, i.e., the internally projecting annular shoulder 34 faces the externally projecting annular shoulder 33 with a small gap between the edge of the internally projecting annular shoulder 34 and the edge of externally projecting annular shoulder 33, as shown in Fig. 2. The outer membrane 5 can be thus pinched by the externally projecting annular shoulder 33 of the tubular core 4 and the internally projecting annular shoulder 34 of the end barrel 2 betwen the edges thereof. In addition, the tubular core 4 has external annular projection 35, and the end barrel 3 has an internal annular projection 36 at a position axially offset from the external annular projection 35. Thus, the outer membrane 5 can be reliably fastened to the tubular core 4 without other fastening means. Modifications of the shoulders and/or the projections are shown in Fig. 30 to 32. In Fig. 30, the tubular core 4 has an externally projecting annular shoulder 33, and the end barrel 3 has an internally projeting annular shoulder 34. Also, the tubular core 4 has an external annular projections 35, and the end barrel 3 has internal annular projections 36 and 37 so that the outer membrane 5 is thus piched in a wavy position. In Fig. 31, the tubular core 4 has an externally projecting annular shoulder 33, and the barrel 3 has an internally projecting annular shoulder 34. Also, the tubular core 4 has an external annular projection 35, and the end barrel 3 has an internal annular projection 36 at a position axially overlapping the exernal annular projection 35. In Fig. 32, the tubular core 4 has an externally projecting annular shoulder 33, and the end barrel 3 has an inernally projecting annular shoulder 34 to pinch the outer membrane 5 therebetween. Referring to Figs. 1 and 3, a piston 13 is slidably arranged in the reservoir 12 of the main barrel 2, and a rod 16 is connected to the rear of the piston 13. The rod 16 has a male thereas 14 along the length thereof and a pair of flat surfaces 15. A nut-like support element 17 having a female thread 18 is arranged in the main barrel 2, the support element 17 being axially and rotationally immovable. The rod 16 is inserted in the support element 17 with the male thread 14 engaging with the female thread 18. Accordingly, the rod 16 with the piston 13 advances in the main barrel 2 to discharge a fluid in the reservoir 12 through the conduit 6 of the tubular core 4 when the rod 16 is rotated. A rotatable hollow actuating rod 19 is inserted in the main barrel 2 and over the rod 16. The actuating rod 19 has a flange 20 at the front end of the actuating rod 19, a ratchet 21 on the rear surface of the flange 20, a pair of inner flat surfaces 22 for engagement with the flat surfaces 15 of the rod 16 for conjoint rotation of the actuating rod 19 and the rod 16, and an outer polygonal profile 23. A manually operable tail cap 24 is attached to the rear end of the main barrel 2, the tail cap 24 having an inner polygonal profile adapted to fit on the outer polygonal profile 23 of the actuating rod 19 for conjoint rotation of the tail cap 24 and the actuating rod 19. The tail cap 24 has a split ring portion 27 with slits 26, and a flange 28 at the front end of the split ring portion 27. The split ring portion 27 is elastically forced into a retaining ring 25 fixed in the main barrel 2 and the flange 28 engages with the inner edge of the retaining ring 25 to retain the tail cap 24 to the main barrel 2 while allowing the rotation of the tail cap 24 relative to the main barrel 2. A nut-like spring support 30 is inserted in the main barrel and over the actuating rod 19, and a spring 31 is arranged between the spring support 30 and the retaining ring 25. The spring support 30 is rotationally immovable but axially mavable. The spring support 30 is urged toward the flange 20 of the actuating rod 19 by the spring 31, and has a ratchet 29 which cooperates with the ratchet 21 of the flange 20 of the actuating rod 19. In use, the spring support 30 axially moves apart from the flange 20 when the actuating rod 19 is rotated in one direction and the teeth of the ratchet 21 of the latter move beyond the teeth of the ratchet 29 of the spring support 30. The ratchets 21 and 29 allow the actuating rod 19 and the tail cap 24 to rotate in one direction only. Figs. 4 to 6 show the applicator 1 according to another embodiment of the present invention. The applicator 1 comprises, similar to the first embodiment, a tubular core 4 having a conduit 6 with an inlet 6a and an outlet 7, and an elastic porous outer membrane 5 covering the tip of the tubular core 4. The tip of the tubular core 4 is cut out along a plane 4a inclined to a longitudinal axis of the tubular core 4, so that the outlet 7 of the conduit 6 opens on one side of the tubular core 4 from the longitudinal axis thereof. In this case, the outer membrane 5 is made from single porous material in the form of a bag. The tip portion of the tubular core 4 has a generally oval cross-section with a pair of opposite larger curvature portions and a pair of opposite smaller curvature portions between the larger curvature portions, as shown in Figs. 4 and 6. The outlet 7 of the conduit 6 opens to one of the larger curvature portions, as shown in Figs. 5 and 6. Accordingly, a fluid soaks through the outer membrane 5 at the inclined surfaces thereof on one side ot the tubular core 4, as indicated by the character S in Fig. 4. The applicator 1 also includes a reservoir 12 in the main barrel 2, a piston 13, and supporting and actuating members similar to those of Fig. 1 and 2. In the example shown Figs. 7 and 8, the tip portion of the tubular core 4 has a pair of flat outer surfaces 4f and the outlet 7 of the conduit 6 opens to one of the flat outer surfaces 4f. The conduit 6 extends straight through the tubular core 4, similar to that of the previous embodiment. The tip of the tubular core 4 is cut out along a plane 4b passing the longitudinal axis of the tubular core 4, and then along a plane 4a inclined to the longitudinal axis of the tubular core 4, to form the outlet 7. In the example shown in Figs. 9 and 10, the tip portion of the tubular core 4 has a pair of flat outer surfaces 4f and the outlet 7 of the conduit 6 opens to one of flat outer surfaces. The edges of the flat outer surfaces 4f are chamfered. The tip of the tubular core 4 is cut out along a plane 4b passing the longitudinal axis of the tubular core 4, and then along a plane 4a inclined to the longitudinal axis of the tubular core 4, to form the outlet 7. The cut out portions along the plane 4b is longer than that of Fig. 7 and 8. In the example shown in Figs. 11 and 12, the tip portion of the tubular core 4 has an oval profile, similar to that of Fig. 5 and 6, In this example, a wall 4g is provided at a distal end of the tubular core 4 past the outlet 7 to block one half of the conduit 6. The tip of the tubular core 4 is cut out along a plane 4b passing the longitudinal axis of the tubular core 4, and then along a plane 4a inclined to the longitudinal axis of the tubular core 4, to form the outlet 7. In the example shown in Figs. 13 and 14, the tip portion of the tubular core 4 has pair of flat surfaces 4f, similar to those of Figs. 7 and 8. In this example, a wall 4g is provided at a distal end of the tubular core 4 past the outlet 7 to block one half of the conduit 6. The tip of the tubular core 4 is cut out along a plane 4a inclined to the longitudinal axis of the tubular core 4 and passing through the top of the wall 4g, to form the outlet 7. In the example shown in Figs. 165to 17, the tip portion of the tubular core 4 has a pair of flat surfaces 4f, similar to those of Figs, 10 and 11. In this example, a wall 4g is provided at a distal end of the tubular core 4 past the outlet 7 to block one half of the conduit 6. The tip of the tubular core 4 is cut out along a plane 4b passing the longitudinal axis of the tubular core 4, and then along a plane 4a inclined to the longitudinal axis to the tubular core 4, to form the outlet 7. Figs. 18 and 19 show a further modification. The outer configuration of tubular core 4 is similar to that of Figs. 11 and 12, but this tubular core 4 has a recess 40 arranged in the conduit 6 of the tubular core 4 near the outlet 7 for holding a fluid therein. In Figs. 20 and 21, the outer configuration of tubular core 4 is similar to that of Figs. 13 and 14, but this tubular core 4 has a recess 40 arranged in the conduit 6 of the tubular core 4 near the outlet 7 for holding a fluid therein. In Figs. 22 and 23, the outer configuration of tubular core 4 is similar to that of Figs. 15 and 16, but this tubular core 4 has a recess 40 arranged in the conduit 6 of the tubular core 4 near the outlet 7 for holding a fluid therein. In Figs. 24 to 26, the outer configuration of tubular core 4 is generally similar to that of Figs. 15 and 16, but an outer shape of the tubular core 4 is gradually reduced toward a distal end of the tubular core 4. In Figs. 27 to 29, the tip of the tubular core 4 is cut out along an inclined surface 4p, and a recess 42 for containing a fluid is provided by drilling the inclined wall in the direction perpendicular to the longitudinal axis of the tubular core 4.

Claims: An applicator (1) for applying a fluid comprising: a tubular core (4) having a longitudinal axis, a generally rounded tip, and a conduit (6) extending along the longitudinal axis, the conduit (6) having an inlet (6a) adapted to receive a fluid and an outlet (7); a porous outer membrane (5) permeable to a fluid and arranged to cover at least a portion of the tubular core (4) including the outlet (7) of the conduit (6); wherein the outer membrane (5) includes an aperture (11) and wherein the outlet (7) of the conduit (6) of the tubular core (4) is formed by cutting out a portion of the tubular core (4) along a plane (4a) inclined to the longitudinal axis, characterized in that the cut out portion of the tubular core (4) is arranged on one side of the longitudinal axis only, that the surface of the other side of the tubular core is rounded, that the aperture (11) is provided on the side of the tubular core (4) corresponding to the side where the outlet (7) is formed and that the aperture (11) is inclined to the longitudinal axis of the tubular core (4). An applicator according to claim 1, wherein a recess (40) is arranged in the conduit (6) of the tubular core (4) near the outlet (7) for holding a fluid therein. An applicator according to claim 1, wherein the tubular core (4) has a generally oval cross-section with a pair of opposite larger curvature portions and a pair of opposite smaller curvature portions between the larger curvature portions, and the outlet (7) of the conduit (6) opens to one of the larger curvature portions. An applicator according to claim 1, wherein the tubular core (4) has a pair of flat outer surfaces (4f), and the outlet (7) of the conduit (6) opens to one of the flat outer surfaces (4f) An applicator according to claim 1, wherein the conduit (6) extends straight through the tubular core (4). An applicator according to claim 1, wherein a wall (4g) is provided at a distal end of the tubular core (4) past the outlet (7) to block the conduit (6). An applicator according to claim 1, wherein an outer shape of the tubular core (4) is gradually reduced toward a distal end of the tubular core (4). An applicator according to claim 1, further comprising a barrel (2) having a reservoir (12) adapted to contain a fluid therein, wherein the tubular core (4) is attached to the barrel (2) so that the inlet (6a) of the conduit (6) receives a fluid in the reservoir (12). An applicator according to claim 8, further comprising a piston (13) arranged in the reservoir (12) of the barrel (2), and actuating means for actuating the piston (13) to discharge a fluid in the reservoir (12) through the conduit (6) of the tubular core (4). An applicator according to claim 9, wherein said actuating means comprises a manually operable member (19,24) which can be rotatably operated to advance the piston (13). An applicator according to claim 10, wherein ratchet means (21,29) is provided to allow the manually operable member (19,24) to rotate in one direction only. An applicator according to claim 8, wherein the barrel comprises a main barrel (2) and an end barrel (3) attached to the main barrel (3), the tubular core (4) being attached to the main barrel (2) with the end barrel (3) enclosing the tubular core (4) so that a portion of the outer membrane (5) covering the outlet (7) of the conduit (6) projects from the end barrel (3). An applicator according to claim 12, wherein the outer membrane (5) is pinched between the tubular core (4) and the end barrel (3). An applicator according to claim 13, wherein the tubular core (4) has an externally projecting annular shoulder (33), and the end barrel (3) has an internally projecting annular shoulder (34) arranged in the opposite sense to the externally projecting annular shoulder (33) of the tubular core (4), whereby the outer membrane (5) is pinched by the externally projecting annular shoulder (33) of the tubular core (4) and the internally projecting annular shoulder (34) of the end barrel (3). An applicator according to claim 13, wherein the tubular core (4) has at least one external annular projection (35), and the end barrel (3) has at least one internal annular projection (36,37) at a position axially offset from the at least one external annular projection (35), whereby the outer membrane (5) is pinched in a wavy configuration by the at least one external annular projection (35) and the at least one internal annular projection (36,37). An applicator according to claim 14, wherein the tubular core (4) has at least one external annular projection (35), and the end barrel (3) has at least one internal annular projection (36,37) at a position axially overlapping the at least one external annular projection (35) whereby the outer membrane (5) is pinched by the at least one external annular projection (35) and the at least one internal annular projection (36,37). An applicator according to claim 1, wherein the outer membrane (5) comprises at least two porous sheet members having different porosities from each other. An applicator according to claim 17, wherein one of the at least two porous sheet members having a larger porosity is arranged on one side of the outer membrane to cover the outlet, and the other porous sheet member is arranged on the other side of the outer membrane. An applicator according to claim 17, wherein the at least two porous sheet members comprises three porous sheet members (8,9,10), the first of three porous sheet members (8) is arranged on one side of the outer membrane (5) to cover the outlet (7), and the second and the third of three porous sheet members (9,10) are arranged on the other side of the outer membrane (5) with the third porous sheet member (10) covering the second porous sheet member (9), the third porous sheet member (10) having the smallest porosity. An applicator according to claim 1, wherein the small aperture (11) is formed by piercing a pin in the outer membrane (5).

Inventors: KIYOKAZU SAKURAI, NOBUYUKI NAKAJIMA, TAKASHI UMENO, KIYOKAZU, SAKURAI, NOBUYUKI, NAKAJIMA, TAKASHI, UMENO
Applicants: MITSUBISHI PENCIL CO, MITSUBISHI PENCIL CO., LTD.
Application year: 1993
Main classification: A45D40
IPC codes: A45D34