Expandable folder

A method for assembling an expandable folder, comprising the steps of:

• folding a first side of a single, integral material over a back, the back having a lower edge, an upper edge, and first and second side edges, the lower and upper edges being parallel and the first and second side edges being parallel, the back having a width defined between said first and second side edges, the first side connected to the first side edge of said back by a first expanding side section having only first, second and third side fold lines, the first side defining an upper edge forming a continuation of and parallel to the upper edge of the back, a lower edge forming a continuation of and parallel to the lower edge of the back and a side edge extending generally perpendicular to the upper and lower edges of the first side, the first side having a slot;
• folding a second side over the back, the second side connected to the second side edge of said back by a second expanding side section having only first, second and third side fold lines, the second side defining an upper edge forming a continuation of and parallel to the upper edge of the back, a lower edge forming a continuation of and parallel to the lower edge of the back and a side edge extending generally perpendicular to the upper and lower edges of the second side, the second side having a slot;
• folding a front connected to the lower edge of said back by an expanding bottom section including only first, second and third lower fold lines toward the back, the front having a cover portion and a fold over portion, the cover portion and fold over portion having first and second side edges forming a continuation of and parallel to the first and second side edges of the back, respectively, the cover portion of said front having a slot, the fold over portion of said front having a first tab and a second tab;
• folding the fold over portion of the front over the upper edges of the first and second sides, and inserting the first tab in the slot in the first side, and inserting the second tab in the slot in the second side and thus positioning the fold over portion between the back and the first and second sides with the first and second tabs received in the slots in the first and second sides with no portion of the first and second tabs and slots exposed, wherein the first and second tabs have an end, the ends received in the slots of the first and second sides with the ends positioned between the first and second sides and the cover portion, the first and second tabs fixed within the slots of the first and second sides as the folder expands as the cover portion and the fold over portion of the front are folded over the upper edges of the first and second sides, wherein the fold over portion covers the slot in the cover portion;
• and
• folding a flap connected to said upper edge of said back by an expanding top section including only first, second, third and fourth upper fold lines over the front, the expanding top section having first and second side edges forming a continuation of the first and second side edges of the back respectively, the flap having first and second edges tapering from the expanding top section to an end of width less than the width of the back, the portion of the expanding top section between the second and third fold lines remaining generally perpendicular the front and back as the folder is expanded such that a label on said portion remains readable from the top of the folder.