Stabilizing means for plastic reinforced paperboard lug box

• US 3,915,372 A
• Filed: 12/05/1974
• Issued: 10/28/1975
• Est. Priority Date: 12/05/1974
• Status: Expired due to Term

• Current Assignee: Walton B. Crane
• Original Assignee: Walton B. Crane
• Inventors: Crane, Walton B.
• Primary Examiner(s): Moorhead, Davis T.
• Application Number:
  US05/529,617
• Time in Patent Office: 327 Days
• Field of Search: 217/40,42 229/23R,36,44R,45,43
• US Class Current: 229/122.22
• CPC Class Codes: B65D 5/005 Separate or attached stacking elements
• CPC Class Codes: B65D 5/22 held erect by extensions of one or more sides being doubled-over to enclose extensions of adjacent sides
• CPC Class Codes: B65D 5/445 Reinforcements formed separately from the container

Abstract

A plastic and paperboard lug box type produce container, comprised of a rectangular paperboard container having sides and ends, a bottom, and lids hinged to the upper edges of the sides, and rectangular, plastic end frames forming caps to receive limited portions of opposite ends of the container, the end walls of the container being stiffened against warpage out of their normal planes by bending a narrow flap therefrom on a horizontal hinge line, and there being lugs formed on the end frame to penetrate apertures in the end walls of the container, with hook ends thereon to engage over edges of these apertures and hold the end walls snugly against the end frames. The end frame has flanges which engage and overlap end portions of the container side walls, and rivets or staples secure these overlapped parts to secure the end frames and boxes in proper assembly notwithstanding repeated stresses in shipment over long hauls.

Claims

1. In a generally rectangular container with rigid rectangular, reinforcing end frames at opposite ends thereof, the container having rectangular bottom, side and end walls, and lids which are hinged to the upper edges of said side walls, said rectangular end frames comprising integral, coplanar, upper, lower and side flanges parallel with the end walls of the container and lying thereadjacent, and rectangular integral upper, lower and side flanges, integral with and projecting perpendicularly from said coplanar flanges from the outer margins thereof, whereby to provide reinforcing caps receiving therein the corresponding end walls of the container and end portions of said bottom walls, with the perpendicular side flanges thereof lying closely adjacent said side walls of said container;

each of said end walls having a horizontal score line near one horizontal edge thereof and the flap so formed being bent through an acute angle on said score line, whereby to resist warpage of said end wall transversely of said score line.

2. The subject matter of claim 1, wherein said score line is near the upper edge of each end wall, and the flap formed thereby is bent inwardly relative to the container through an acute angle relative to the plane of the end wall.

3. The container of claim 1, including means on the end frames engaging said flaps to force them into and to hold them in said bent positions.

4. The container of claim 2, including means on the end frames engaging said flaps to force them into and to hold them in said bent positions.

5. The container of claim 1, wherein:

portions of the perpendicular side flanges of the end frames overlap adjacent portions of the side walls of the container; and

including fastener elements penetrating said overlapping portions of said side flanges of said end frames and side walls of said container.

6. The subject matter of claim 3, including also:

headed prongs on and projecting from said upper and lower coplanar frame flanges and cooperating apertures in said end walls of said container which receive and engage behind the heads of said prongs to releasably hold said end walls snugly against said frame flanges.

7. The subject matter of claim 3, in which said flap engaging means comprise walls of angular profile on said end frames engaging the upper edges of said flaps to support them in said bent positions.