CANISTER FOR A METERED DOSE INHALER AND METHOD OF PRODUCING SUCH CANISTER

摘要

The invention relates to a canister for a metered dose inhaler for storing a propellant and a medicament under pressure and dispensing said medicament and to a method of producing such a canister. The canister (1) comprises an interior cavity (5) defined by a tubular sidewall (2) defining a longitudinal axis (4) of the canister (1), and a bottom wall (3) and a top cover (15) closing opposite longitudinal ends of the sidewall (2) such that the sidewall (2) extends along the longitudinal axis (4) between the bottom wall (3) and the top cover (15). The bottom wall (3) comprises a central inwardly domed portion (8). The wall thickness of the sidewall (2) is smaller than the wall thickness of the bottom wall (3), and the thickness of the bottom wall (3) is in the range of 0.25 to 0.47 mm and the thickness of the sidewall (2) is in the range of 0.15 to 0.42 mm. The canister (1) may be produced by providing a circular metal blank, deep drawing a cup-shaped container, and ironing the sidewall (2) in order to reduce the wall thickness thereof.

主权项

1. A canister for a metered dose inhaler for storing a pro-pellant and a medicament under pressure and dispensing the medicament, the canister comprising an interior cavity defined by
a tubular sidewall defining a longitudinal axis of the canister, and a bottom wall and a top cover closing opposite longitudinal ends of the sidewall such that the sidewall extends along the longitudinal axis between the bottom wall and the top cover, wherein the bottom wall comprises a central inwardly domed portion, wherein the wall thickness of the sidewall is smaller than the wall thickness of the bottom wall, the thickness of the bottom wall is in the range of 0.25 to 0.47 mm and the thickness of the sidewall is in the range of 0.15 to 0.42 mm.