초록 ▼

Disclosed is a dispenser for liquids or for viscous or sprayable products to which a disposable container is tightly attached and to which a dosage device is attachable. The inventive dispenser is provided with a cylinder-housing (3), suction or compression cylinders which can be moved back and fort

Disclosed is a dispenser for liquids or for viscous or sprayable products to which a disposable container is tightly attached and to which a dosage device is attachable. The inventive dispenser is provided with a cylinder-housing (3), suction or compression cylinders which can be moved back and forth (1) and a valve between the suction and pressure cylinders. For the purpose of producing a dispenser suitable for liquids of differing consistencies which avoids contact between the liquid and metal parts and the invasion of bacteria in the air, the invention proposes that the cylinder housing at one end accommodates the cylinder (1) which has a pressure spring (2) located in a recess and that at the other end a valve seat (5) is provided with a membrane disk (4) which is stretched at the periphery thereof in order to close off the container or open the through-flow from said container.

대표청구항 ▼

Disclosed is a dispenser for liquids or for viscous or sprayable products to which a disposable container is tightly attached and to which a dosage device is attachable. The inventive dispenser is provided with a cylinder-housing (3), suction or compression cylinders which can be moved back and fort

Disclosed is a dispenser for liquids or for viscous or sprayable products to which a disposable container is tightly attached and to which a dosage device is attachable. The inventive dispenser is provided with a cylinder-housing (3), suction or compression cylinders which can be moved back and forth (1) and a valve between the suction and pressure cylinders. For the purpose of producing a dispenser suitable for liquids of differing consistencies which avoids contact between the liquid and metal parts and the invasion of bacteria in the air, the invention proposes that the cylinder housing at one end accommodates the cylinder (1) which has a pressure spring (2) located in a recess and that at the other end a valve seat (5) is provided with a membrane disk (4) which is stretched at the periphery thereof in order to close off the container or open the through-flow from said container. aimed in claim 2 wherein the rib segments are substantially evenly spread around the inside circumference of the band. 5. A closure as claimed in claim 2 wherein the rib segments constitute at least 65% of the internal circumference of the band. 6. A closure as claimed in claim 5 wherein the rib segments constitute at least 80% of the internal circumference of the band. 7. A closure as claimed in claim 2 wherein the rib segments are each separated by a gap and wherein alternate ones of said projections are disposed between and below the gaps between adjacent segments. 8. A closure as defined in claim 7 wherein intermediate projections between said alternate projections extend to substantially the center of the underside of the rib segments. 9. A closure as claimed in claim 1 wherein the areas of localized thickening are of a thickness sufficient that they project radially beyond the circumference of the remainder of the closure. 10. A closure as claimed in claim 1 wherein the closure is formed with means of sealingly engaging with the container to prevent leakage therefrom and wherein said means for sealingly engaging the closure with the container comprises an annular sealing rib which projects downwardly from an underside of the top portion of the closure, the rib including a first portion having a substantially cylindrical inner surface, the first portion being contiguous with the top and lying adjacent to the skirt of the closure and a second, frusto-conical, portion contiguous with an end of the first portion distal to the top and extending radially inwardly to terminate in a circular free edge, the first portion having an internal diameter at least equal to an external diameter of the neck of the container to which the closure is to be attached such that during engagement of the closure with the neck, the second, frusto-conical, portion will be engaged by a free end of the neck and folded back towards the substantially cylindrical inner surface of the first portion of the rib to form a gas-tight seal between at least an outer surface of the neck of the container and the closure. 11. A closure as claimed in claim 1 wherein the complementary closure retention means is a screw thread. 12. A closure as claimed in claim 11 wherein the thread on the internal surface of the skirt is formed of a series of thread segments arranged, starting from a first thread segment distal to the top, along a helical thread locus. 13. A closure as claimed in claim 12 wherein each of the thread segments, except the first, is formed with two substantially planar end surfaces which are each inclined to the axis of the closure and face in a direction downwardly and away from the top of the closure. 14. A closure as claimed in claim 12 wherein each of the substantially planar ends of the thread segments are also inclined to a notional radial plane extending from the longitudinal axis of the closure to the end of the respective thread segment. 15. A closure as claimed in claim 1 the tamper evident band portion is joined to the free edge of the skirt portion. 16. A closure as claimed in claim 15 wherein the tamper evident band portion is joined to the skirt portion through a plurality of frangible bridges. 17. A method of forming a closure as defined in claim 1 comprising a step of injection molding a synthetic plastics material into a mold, the mold defining a recess corresponding in cross-sectional shape to the slope of the upper side of the rib. 18. A method of forming a closure as defined in claim 17 further comprising the step of relatively ejecting the closure from the mold. 19. A container having a screw threaded neck and a retaining flange below the threaded portion of the neck, to which is connected a closure as defined in claim 1. 20. A closure suitable for mounting onto a container having closure retention means on the neck of the container, said closure being molded from a resilient material and comprising a top portion, a skirt portion de