Paperboard bulk bin

Claim 2

A paperboard bulk bin comprising: a side wall formed from a plurality of alternating, foldably connected, substantially rectangular upstanding side and corner panels, each corner panel having a horizontally disposed stepped flap foldably connected to the bottom edge thereof, each stepped flap being of a width corresponding to the width of the associated corner panel at the bottom edge thereof and having a tongue portion of reduced width at the opposite free edge thereof; each of said side panels having a horizontally disposed, substantially rectangular locking flap, foldably connected to the bottom edge thereof, each said locking flap having opposed cut-outs on opposite side edges thereof, each said cut-out being intermediate the length of said side edge, said stepped flaps and locking flaps being in interengaged locking relationship to form a peripheral base support for the bulk bin; and a bottom wall formed from a substantially flat, horizontally disposed panel insert having a perimeter corresponding to the bottom edges of said side and corner panels and overlying the said peripheral support base.

Claim 3

A paperboard bulk bin as in claim 1 wherein the tongue portion of each step flap is tapered.

Claim 4

A paperboard bulk bin as in claim 1 wherein the cut-outs of each locking flap are arcuate.

Claim 5

A paperboard bulk bin as in claim 1 wherein each stepped flap is tapered intermediate the tongue and the portion thereof which is of a width corresponding to the width of the associated corner panel.

Claim 6

A paperboard bulk bin as in claim 1 wherein the opposite free edges of each locking flap include generally rectangular tab portions.

Claim 7

A paperboard bulk bin as in claim 1 wherein one of said side panels is formed of two portions adhesively bonded together.

Claim 8

A paperboard bulk bin as in claim 1 wherein said bin is formed from a single wall corrugated board.

Claim 9

A paperboard bulk bin comprising: a side wall formed from a plurality of alternating, foldably connected, substantially rectangular upstanding side and corner panels, each corner panel having a horizontally disposed stepped flap foldably connected to the bottom edge thereof, each stepped flap being of a width corresponding to the width of the associated corner panel at the bottom edge thereof and a tapered tongue portion of reduced width at the opposite free edge thereof; each of said side panels having a horizontally disposed, substantially rectangular locking flap, foldably connected to the bottom edge thereof, each said locking flap having opposed arcuate cut-outs at opposite side edges thereof, each said cut-out being intermediate the length of side edge, and with the free edges of said locking flap including tab portions of generally rectangular configuration, said stepped flaps and locking flaps being in interengaged locking relationship such that said rectangular tabs overlie the tapered tongue portion of the contiguous stepped flap to form a peripheral base support for a bulk bin; and a bottom wall formed from a substantially flat, horizontally disposed panel insert having a perimeter corresponding to the bottom edges of said side and corner panels and overlying said peripheral support base.

Claim 10

A paperboard bulk bin comprising: a side wall formed from a plurality of alternating, foldably connected, substantially rectangular upstanding side and corner panels, each corner panel having a horizontally disposed stepped flap foldably connected to the bottom edge thereof, each stepped flap being of a width corresponding to the width of the associated corner panel at the bottom edge thereof and a tapered tongue portion of reduced width at the opposite free edge thereof; each of said side panels having a horizontally disposed, substantially rectangular locking flap, foldably connected to the bottom edge thereof, each said locking flap having opposed arcuate cut-outs at opposite side edges thereof, each said cut-out being intermediate the length of side edge, and with the free edges of said locking flap including tab portions of generally rectangular configuration, said stepped flaps and locking flaps being in interengaged locking relationship such that said rectangular tabs overlie the tapered tongue portion of the contiguous stepped flap to form a peripheral base support for a bulk bin; and a bottom wall formed from a substantially flat, horizontally disposed panel insert having a perimeter corresponding to the bottom edges of said side and corner panels and overlying said peripheral support base.

Claim 11

A paperboard bulk bin as in claim 8 wherein said bin is formed from a single wall corrugated board.

Claim 12

A paperboard bulk bin as in claim 8 wherein one side panel is formed of two portions adhesively bonded together.

Claim 13

A paperboard bulk bin as in claim 1 wherein the four edges of said panel inserts are folded upwardly to conform to the angular relationship between said corner flaps and the adjacent side panels.

Claim 14

A paperboard blank for a bulk bin, which comprises: a plurality of alternating, foldably connected, substantially rectangular side panels and corner panels, each corner panel having a stepped flap foldably connected to the bottom edge thereof, each stepped flap being of a width corresponding to the width of the associated corner panel at the bottom edge thereof and having a tongue portion of reduced width at the opposite free edge thereof; each said side panel having a substantially rectangular locking flap foldably connected to the bottom edge thereof, each said locking flap having opposed cut-outs at the opposite side edges thereof, each said cut-out being intermediate the length of said side edge; and said foldably connected side panels, corner panels, stepped flaps and locking flaps being connected along scored, fold lines.

Claim 15

A paperboard blank for a bulk bin, which comprises: a plurality of alternating, foldably connected, substantially rectangular side panels and corner panels, each corner panel having a stepped flap foldably connected to the bottom edge thereof, each stepped flap being of a width corresponding to the width of the associated corner panel at the bottom edge thereof and having a tongue portion of reduced width at the opposite free edge thereof; each said side panel having a substantially rectangular locking flap foldably connected to the bottom edge thereof, each said locking flap having opposed cut-outs at the opposite side edges thereof, each said cut-out being intermediate the length of said side edge; and said foldably connected side panels, corner panels, stepped flaps and locking flaps being connected along scored, fold lines.

Claim 16

A paperboard blank for a bulk bin as in claim 11 wherein said blank is formed of a single wall corrugated board.

Claim 17

A paperboard bulk bin as in claim 1 wherein said bin is formed from a double wall corrugated board.

Claim 18

A paperboard bulk bin as in claim 8 wherein said bin is formed from a double wall corrugated board.

Claim 19

A paperboard blank for a bulk bin as in claim 11 wherein said blank is formed of a double wall corrugated board.