Patent ID: 7635344
Filing Date: 2009-12-22
Classification: A61J,A61M

Abstract:
1. A method of preparing a composition, comprising: providing a packaging material containing a mixing device, the mixing device comprising: without exposing the device to an environment external to the packaging material, puncturing the septum of the container with the piercing structure, the piercing structure being configured such that the tube portion traverses the septum and the head portion is retained within the container after the puncturing; without exposing the device to an environment external to the packaging material, repositioning the valve from a closed position to an open position; with the valve in the open position, sliding the piston in a first direction from a first position within the chamber to a second position within the chamber, the sliding drawing one of the first and second components through the piston; mixing the first and second materials to form a mixture, the mixing comprising after sliding the piston in the first direction and with the valve in the open position, sliding the piston in a second direction opposite the first direction, and subsequently sliding the piston again in the first direction; and drawing the mixture into the chamber through the piston.