Method and apparatus for forming a hinge for laminated corrugated material

摘要

A corrugated plastic slip pallet is provided and comprises an intermediate corrugated member sandwiched between two generally planar sheet-like panel members and having a flat body portion on which boxes are supported and three lip portions hingedly connected to edges of the flat body portion and forming an included angle therewith of between about 135 and 160 degrees and wherein the hinge connection comprises two spaced apart welded portions extending parallel to an associated edge of the flat body portion and wherein the portions of the intermediate corrugated member and the two generally planar sheet-like panel members between the two spaced apart welded portions are not welded together. The flat body portion has a generally planar bottom surface and the hinge connection has a portion thereof located below the generally planar bottom surface so that when an unloaded plastic slip pallet is supported by a planar support surface, a major portion of the bottom surface is spaced from the support surface so that when the boxes are loaded onto the flat body portion, the major portion will be moved into contact with the support surface and move the lip portion to decrease the included angle between the lip portions and the flat body portion. Also provided is apparatus for forming a plurality of corrugated plastic board-like members into corrugated plastic slip pallets using an ultrasonic welding apparatus.