Abstract: A masonry block includes a top face 20 having a protrusion 23 which is sized to engage the indentation 31 defined in the bottom faced 30 of an adjacent masonry block. The protrusion 23 is flanked by a wide flat surface 21 and a narrow flat surface 22, while the indentation 31 is similarly flanked by a wide flat surface 32 and a narrow flat surface 33. Where the wide flat surface 21 of a lower masonry block is adjacent to the narrow flat surface 33 of an upper masonry block, a retaining wall 100 having an angle of repose results. Where the wide flat surface 21 of the lower masonry block is adjacent to the wide flat surface 32 of the upper masonry block, a freestanding wall 110 that is vertically oriented results.

Abstract: A device for removing covers from corrugated paperboard boxes including stations for cutting the sides and ends of the boxes (8,24) through the use of water jets (62) shielded by a dissipater (76) when not in use and then physically removing the severed top at station (42) by impaling it upon spikes (138) mounted to chains (116,120) and moving the severed top in a direction different from the main box.

Abstract: A machine to erect flat-folded cartons, especially such as carry beverage containers, from a flat-folded storage configuration to three dimensional carrying configuration. The machine feeds folded containers from a storage hopper, in singulated fashion, between two endless forwardly flaring vacuum belts which hold the carton sides and move them simultaneously therealong to initialy expand the container. The partially expanded container is then completely expanded and fastened by a cooperating over-head positioning chain structure and an underlying cam wheel and thereafter delivered for further operation. The assembly operations are sequentially timed. The vacuum belts are particularly configured to allow a continuous, rapid operation with low air flow.