Patent ID: 6669040
Filing Date: 2003-12-30
Classification: B65D,Y10S

Abstract:
A container capable of maintaining a compressed state in a longitudinal direction comprising a container body of which whole length in a longitudinal direction or a part thereof is formed into an accordion with folds except a tap portion, said accordion including:a convex portion having an inside periphery connected with the tap portion and an outside periphery; a upper group of plate members increasing gradually in length downwards as measured on a cross-sectional plane taken along a longitudinal axis of the container, each upper-group plate member, except a last upper-group plate member having an inside periphery connected with an inside periphery of an upper-group plate member by a fold therebetween, and each upper-group plate member, except a first upper-group plate member, having an outside periphery connected with an outside periphery of an upper-group plate member by a fold therebetween, the first upper-group plate member having an outside periphery connected with the outside periphery of the convex portion; and a lower group of plate members maintaining a same length as measured on the cross-sectional plane, each lower-group plate member, except a first lower-group plate member, having an inside periphery connected with an inside periphery of an lower-group plate member by a fold therebetween, and each lower-group plate member, except a last lower-group plate member, having an outside periphery connected with an outside periphery of an lower-group plate member by a fold therebetween, the first lower-group plate member having an inside periphery connected with an inside periphery of the last upper-group plate member, each lower-group plate member is longer than each upper-group plate member, and said folds are so formed that a force along the longitudinal direction applied to the tap portion of said container body reaches a balance between a downward force on inside peripheries of the convex portion and the upper-group plate members and a upward force on inside peripheries of the lower-group plate members such that the inside peripheries of the convex portion and the upper-group plate members are collapsed downward and the inside peripheries of the lower-group plate members are raised upward, and a balance between a upward force on outside peripheries of the upper-group plate members and a downward force on outside peripheries of the lower-group plate members such that the outside peripheries of the convex portion and the upper-group plate members are raised upward and the outside peripheries of the lower-group plate members are collapsed downward.