Patent ID: 8640873
Filing Date: 2014-02-04
Classification: A61J,B65D

Abstract:
1. A plastic ampule comprising: a body portion substantially formed of a cylinder shape; a head portion substantially formed of a semispherical bowl shape continuously to a mouth portion of the body portion via a cut-off portion; and a part of the head portion that is formed continuously to the cut-off portion has a wall thickness thicker than a wall thickness of the cut-off portion; and a knob portion formed continuously to the head portion, wherein the plastic ampule is unsealed by twisting the knob portion and cutting the head portion off the mouth portion at the cut-off portion, an upper part of the mouth portion has a smaller diameter than a lower part of the mouth portion to form a shoulder portion, a curved inner portion of the upper part of the mouth portion decreases in diameter as the curved inner portion approaches the cut-off portion, and a substantially arc-shaped inner surface of a hollow portion in the head portion decreases in diameter as the arc-shaped inner surface approaches the cut-off portion, such that the inner surface of the hollow portion in the head portion and the inner surface of the mouth portion have equivalent diameters at the cut-off portion.