Collapsible carton

Claim 1

A collapsible unitary carton of semirigid sheet material comprising: a. a first panel member forming a first pair of end members foldably secured to a bottom member along a first pair of transverse fold lines, said end members and bottom member having a central score line extending along said members and substantially bisecting said pair of fold lines, said bottom member having additional score lines extending diagonally from each corner thereof towards said central score line; b. a second panel member forming a pair of half width end members foldably secured to a side member along a second pair of transverse fold lines substantially aligned with said first pair of transverse fold lines, said side and bottom members being foldably secured to each other along one of the edges thereof, said side member having a cover flap and one of said pair of half width end members having a full width cover flap with a dependent flange member projecting therefrom adjacent said end member, the transverse length of said dependent flange member being substantially less than the transverse length of its adjacent half-width end member, said cover flaps and dependent flange member being foldable about another fold line extending along the other edge of said side member, a score line substantially bisecting said end cover flap secured thereto; c. a third panel member identical in form to said second panel member but reversed in end-to-end relationship and having a third pair of transverse fold lines substantially aligned with said first and second pair of transverse fold lines forming a second side member, said second side and bottom members being foldably secured to each other along the other of the edges thereof; d. fastening means securing said flange members and said half width end members to said cooperating end members; e. at least one elongated slit formed in each of said side members substantially midway between and along a plane parallel to said end members of said carton; f. and a partition panel having a fold line at the center of the same and at least a pair of narrow flange members formed on the edges thereof secured to said side members by said fastening means with at least one tab element formed therewith extending outwardly engaging said elongated slits; g. said dependent flange members being disposed between a respective end and half-width member with said flange members being constructed and arranged so that the respective end members with the half-width members and flange members secured thereto present only oNe thickness of material along said central score line to allow ready collapse of the carton.