Repulpable, reinforced corrugated containers

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings and specifically to FIG.
1 thereof, there is shown a corrugated bulk bin type container 10 comprising bottom panels 3a,b,c,d and upstanding longitudinal panels 5a,b,c,d connected to the bottom.
Top flaps 7a,b,c,d connected to the top ends of the longitudinal panels together upon folding form the top panel of the bin.
These bins are made of corrugated paperboard and may be of a single or double wall construction.
A loaded bin may carry as much as from 1,000-2,500 pounds of bulk material.
Portions of the bin are provided with reinforcing material 14 as can be seen in the cut-away portion of FIG.
1.
The reinforcing material is generally placed at those portions of the container 10 that will encounter the most stress upon loading or shifting of the materials to be shipped or stored therein.
As shown, bottom panel 3a is provided with reinforcing material 14 as well as are defined heights of longitudinal panels 5a,b,c,d that extend upwardly from the bottom of the container.
It will be appreciated that the reinforcement material 14 may be placed at a variety of locations around the bin structure, or, in some cases, the entire assembly may need reinforcement.
As can be best seen in FIGS.
3 and 4, and with regard to longitudinal panel 5a, the bin structure, in the areas of reinforcement, comprises an outer liner 20, intermediate corrugated or fluted medium 16 and inner liner 18.
Inner liner 18 is adhered to the corrugated medium 16 by conventional adhesives.
Interposed between corrugated medium 16 and outer liner 20 is reinforcing material 14 comprising a mesh like assemblage of natural, cellulosic fibers.
Two-way dimensional stability is imparted to the bin by use of reinforcing material 14 due to its provision of strands (i.
e.
, fibers or yarns) in an interlocking or interlacing pattern.
Reinforcement material 14 is adhered to corrugated medium 16 by conventional water soluble glues such as the starch based adhesives.
The entire assembly of inner and outer liners 18,20, intermediate corrugated medium 16 and reinforcement 14 may be assembled in conventional equipment such as the type schematically illustrated in FIG