| 摘要 |
<p>A method of sealing a medical container such as a vial with a polymeric closure, wherein the polymeric enclosure includes a tubular collar portion and an integral radial portion, which includes disposing the tubular collar portion over the radial rim portion of the container to surround the reduced diameter neck portion and radially deforming the tubular collar portion adjacent its free end into the reduced diameter neck portion and against the adjacent radial rim portion and, wherein the polymer selected for the closure is sufficiently malleable to permit radial deformation, yet sufficiently rigid to retain its shape following deformation and sufficiently resistant to creep to maintain a seal between the plastic closure and the container following radial deformation. In the preferred embodiment of the method, the crimping tool or tools include an inclined surface having a gradually decreasing angle of inclination, which is driven against the tubular collar portion adjacent the free end and the container and vial assembly and crimping tool are relatively rotated. In the most preferred embodiment of the method of this invention, the crimping tool includes an inclined surface or surfaces, which may be separate surfaces or a continuously inclined surface, to gradually and progressively deform the tubular collar portion into the reduced diameter neck portion and against the adjacent radial rim portion in cold forming process.</p> |
