| CPC B65D 77/06 (2013.01) [A45D 34/00 (2013.01); B05B 11/0038 (2018.08); B65D 21/086 (2013.01); B65D 43/0231 (2013.01); A45D 2200/056 (2013.01); B05B 11/1001 (2023.01); B05B 11/1047 (2023.01); B65D 2543/00092 (2013.01)] | 12 Claims |
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1. A multilayered container comprising:
an inner container configured to contain content; and
an outer container configured to replaceably accommodate the inner container, wherein
the inner container has a side surface formed with a plurality of folded pleats contractable and expandable in a vertical direction, so that the inner container is shrinkable along the plurality of folded pleats inside the outer container,
the inner container is made of a flexible material that is shrinkable when the inner container is depressurized, and includes a metal layer or an inorganic layer, and
an airless discharge mechanism, configured to discharge the content in response to being driven, including a mechanism configured to prevent air from entering the inner container when discharging the content, is attached to an upper surface of the inner container,
the side surface of the inner container includes first folded pleats formed by each side of parallelograms, and second folded pleats formed by diagonal lines of the parallelograms,
the first and second folded pleats form a plurality of units stacked in the vertical direction, so that vertically adjacent units share a top side and a bottom side of adjacent parallelograms,
mountain-fold creases or valley-fold creases of the first and second folded pleats in the plurality of units are formed by each side of parallelograms, and diagonal lines of the parallelograms,
a decrease in an amount of the content in the inner container, corresponding to an amount of the content discharged from the airless discharge mechanism in response to being driven, continuously depressurizes the inner container and causes the plurality of folded pleats to contract, thereby causing the mountain-fold creases to protrude outward and the valley-fold creases to fold inward and collapse the first and second folded pleats, to thereby shrink the inner container and maintain the inner container in a shrunk state,
the side surface is vertically symmetrical for each of the plurality of units, such that the side surface is configured to be vertically crushed without changing positions of an upper end and a lower end of the side surface as the inner container shrinks,
an uppermost unit among the plurality of units of the inner container includes a flange, provided at the upper end of the side surface of the inner container,
the upper end of the side surface of the inner container and one of the diagonal lines meet at a point on the flange that is connected to the outer container, and
the flange extends radially outward in a horizontal direction from the point toward an outer edge of the multilayered container.
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