Abstract: A round trip mailer box is formed from a unitary corrugated cardboard blank with a plurality of scored lines for a quick and easy folding of panels to set up the box. The corners of the box are reinforced and strengthened by folding and bracing corner panels. The folding of the box is completed by inserting tabs on two interchangeable and overlapping top panels, one over the other, into cutouts on opposite sides of the box. These overlapping top panels can be interchanged so that when a mailing label is placed on each top panel, the box can be mailed to a recipient and later remailed back to the sender by simply interchanging the relative positions of the top panels. The box is easily secured in its closed position by taping or other closure means at the two inserted end tabs of the box and is easily opened, reclosed and reused.

Abstract: A cardboard box, made from a single cardboard blank, has a slanting upper surface to enable the contents of the box to be clearly seen. Opposed interlocking points are formed along the slanting side edge. When one such box is inverted and stacked on another, the interlocking points come into abutment and keep the boxes from sliding apart. As a result, boxes with truncated triangular cross-section may be stacked and shipped as if they were rectangular in all dimensions.

Abstract: An outer mailing jacket is made from a folded sheet of suitable material, such as corrugated cardboard. The jacket has corner panels for centrally positioning a product enclosed therein. The mailing jacket is especially designed for receiving and supporting phonograph records, without danger that a staple used to close the jacket might damage the record.

Abstract: A single and unitary blank has a plurality of housing forming panels on one end and a plurality of drawer-forming panels on the other end. The housing and drawer panels are joined by a series (here, three) of drawer position control panels which allows the drawer to be pulled far enough to enable the contents thereof to be inserted or removed. However, the series of drawer position control panels also restrains the drawer and prevents it from being completely removed.

Abstract: A preferably corrugated cardboard, shock-absorbing carton insert completely surrounds a product except for the top which is open to display the product to view. The insert is made from a corrugated cardboard blank having preformed score and cut lines which enable the blank to fold into a generally rectangular box having enlarged end panels that support the box in a position which is spaced away from all adjacent structures. There is a V-shaped fold between the box and each of its end panels to provide greater rigidity and further strength. Tab ends are positioned between the box and the end panel to help absorb a shock in any direction. The corrugated cardboard automatically assumes a desired end-product configuration responsive to four simple folding motions.

Abstract: A single and unitary, generally rectangular blank is preferably made of corrugated cardboard, with a waterproof surface. On the corners of the blank, a pair of triangular panels are brought together, in a V-fold, and into a face-to-face contact. Then, the corner panels are folded over the ends of a box as the four sides of the rectangular blank are raised to form the side and end panels of a five-sided box. A cover panel is integrally joined to one edge of a side panel, to swing down and close the box. While the leakproof box has many uses, it is presently thought that it will primarily be used to ship frozen poultry.