Patent ID: 7841484
Filing Date: 2010-11-30
Classification: B65D,Y10S,Y10T

Abstract:
1. A capped container comprising: (a) a container body including a wall portion, a cap attachment portion provided at a predetermined position of the wall portion and adapted to attach a cap thereto, and a rupture portion formed at the cap attachment portion; (b) a tubular base portion attached to the wall portion and surrounding the rupture portion; (c) a movable tube disposed in the base portion and thread-engaged with the base portion; and (d) a screw cap disposed outside the base portion, thread-engaged with the base portion, engaged with the movable tube, and adapted to rotate the movable tube while being rotated, wherein (e) a cutting member, including a plurality of blades each comprising a leading cutting edge and a trailing cutting edge and adapted to cut the rupture portion as the screw cap is rotated, is formed at a lower end of the movable tube; (f) first and second bottom portions are formed in the peripheral direction of the cutting member, the first bottom portion formed between pointed tips of first and second blades of the plurality of blades and defining a first interval between the pointed tips of the first and second blades and the second bottom portion formed between pointed tips of the third and fourth blades of the plurality of blades and defining a second interval between pointed tips of the third and fourth blades, wherein the first and second intervals are provided over a range wider than intervals provided between pointed tips of the remaining adjacent blades of the plurality of blades; (g) the second bottom portion comprises a trailing cutting edge of the third blade; a flat portion formed rearward from the trailing cutting edge; a straight edge gradually sloping up from the trailing end of the flat portion; and a leading cutting edge of the fourth blade; and (h) the depth of the leading cutting edge of the fourth blade in the second bottom portion is less than a depth of a leading cutting edge of the remaining blades of the plurality of blades.