Collapsible container

Claim 1

A collapsible and extensible container including upper and lower container parts in which a lower part fits vertically telescopically within an open-bottom upper part and in which the upper and lower parts respectively have upper and lower upright walls closely spaced horizontally apart, characterized in that the lower wall has an upper portion including an integral lip projecting outwardly toward the upper wall and the upper wall has integral upper and lower lips projecting inwardly toward the lower wall and spaced vertically apart respectively above and below the lower wall lip to cooperate with the lower lip in defining upper and lower stops representing, respectively, extended and collapsed positions of the container parts, laterally projectable and retractable upper lock means carried by the lower wall in downwardly spaced relation to the lower wall lip, said means being retractable to be passed upon upward movement of the upper container from its collapsed position to its extended position and projectable to engage beneath the upper wall lower lip to retain said extended position of the upper container part, said means being retractable from beneath the upper wall lower lip to enable return of the upper container part to its collapsed position, and lower releasable lock means carried by the lower wall below the upper means and releasably engageable with the upper wall when the upper container part is in its collapsed condition, whereby to lock the contained parts together in their collapsed position.