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US 7,438,704 B1Granted
Open instillation container and method of manufacturing the container
AssigneeSanten Pharmaceutical Co., Ltd.
InventorsYoichi Kawashima, Yukio Kusu
Life of this patent
Estimating the term…
Abstract
A bottomed conical hollow 6b is formed in a tip end of the container body A formed of a thermoplastic material with a liquid filled and sealed therein simultaneously during the molding process, the hollow having an inside diameter enlarging toward the tip end, and a small-diameter instilling hole 6c is penetrated through the bottom of the hollow 6b for controlling, at a set quantity, the liquid pushed out of the container body A.
Claims9
An eye drop container, comprising:
- a flexible hollow body portion having a closed end for containing a liquid therein;
- and
- a dispensing body portion having a tip end spaced from the closed end of the hollow body portion, with the liquid free to move within the container between the flexible hollow body portion and the dispensing body portion, the dispensing body portion, comprising:
- a first hollow body segment having an external circular surface and an opposite internal circular surface, with the external circular surface having decreasing diameter as the distance from the tip end decreases to have the smallest diameter at the tip end, and the internal circular surface having decreasing diameter as the distance from the tip end decreases;
- and
- a second body segment extending from the tip end into the first segment, the second segment having an outside circular surface and an opposite internal surface, with the internal surfaces of the first and second segments facing one another, spaced from one another, and the external surface of the second segment having increasing diameter as the distance from the tip end decreases, with the second segment at a predetermined distance from the tip end terminating in a small-diameter instilling hole, the internal surface of the second body segment providing a passageway, wherein the passageway has no obstruction such that the liquid is free to move through the passageway and out of the tip end,
- wherein said hollow body portion and the dispensing body portion are integrally and unitarily formed as one piece to form a blow-mold product or a vacuum-mold product,
- wherein the tip end of the external surface has a bowl-shaped curved surface that is free of burrs, and
- wherein applying a predetermined pressure to the body portion moves a predetermined amount of the fluid in the container through the instilling hole.
6 more elements
Dependencies are inferred from the claim text.