Patent ID: 6764436
Filing Date: 2004-07-20
Classification: B31B

Abstract:
A method for squaring flattened case blanks in preparation for use comprising the steps of:providing a plurality of flattened case blanks, each case blank having a minimum of a first major side panel, a first outer folded corner adjacent to said first major side panel, a second outer folded corner on the opposite end of the case blank from said first outer folded corner, two bottom major flaps, and two bottom minor flaps; gripping said first major side panel of the lead case blank of said plurality of flattened case blanks, leaving the remaining three side panels free to rotate about the axes represented by the four folded corners of said lead case blank; rotating said first major side panel and subsequently, said lead case blank, away from said plurality of flattened case blanks about an axis which is parallel to and adjacent to a line represented by said first outer folded corner of said lead case blank; and putting the edge of said lead case blank, comprised of said second outer folded corner, into contact with a fixed curved member as said first major side panel is rotated, causing the distance between said outer folded corners to gradually decrease until said lead case blank is forced into a squared configuration as the degree of rotation of said first major side panel reaches substantially 90 degrees.