Abstract: A novel adjustable width paperboard or corrugated paper tray having a tray telescopically associated with a tray support. Engagement devices, preferably in the form of a plurality of spaced serrations or triangular shaped projections associated with each inner wall of the tray support and with the inner wall of the tray, are integrally formed with the tray and the tray support and matingly engage with each other in a fashion that can be disengaged so that the tray can be moved to a desired width and the serrations re-engaged to lock the tray in the desired position.

Abstract: A paperboard panel having score lines thereon such that it can be folded to form a 4-point glued infold tray to contain product, can be folded flat for storage purposes or can receive product and be further folded to form a closed box-like structure totally enclosing the product and having a self-locking feature to keep the box in its closed position.

Abstract: A multiple product container carton having a rectangular base portion and substantially triangular side walls with opposing slots in the side walls for holding product containers. End walls are hingedly connected to the ends of the rectangular base portion and fold upwardly and lock to the side walls to securely hold the product containers in the carton. Perforation lines may extend between the opposing pairs of slots such that a product container may be removed from the carton by tearing along the perforation lines.

Abstract: A cardboard display device with easel that is collapsible and constructed and assembly from a unitary paperboard blank. The display device is an automatic set up type with an extremely simple locking action. The easel is not cut out of the display and therefore does not weaken the structure. The rigid, girder like structure is capable of supporting heaving weights placed in the display. The device is easily assembled and disassembled.