Abstract: A building block (2) comprising two side panels (6, 8) with at least one open side, the side panels spaced apart by two bridging parts (10, 12), a removable section (17) on at least one bridging part (10, 12), and a pair of recessed or protruding formations (20) on opposite inner faces of the open end of the side panels (6, 8) to enable building blocks to be interconnected. A location device (40) comprising two members (44) spaced apart by cross members (42), where the two members (44) extend beyond the cross members (42) to engage with formations (26) of one or more building blocks (2) is also disclosed. A wall constructed from building blocks (2) and utilising location devices (40) and a method of constructing such a wall are similarly disclosed.

Abstract: Apparatus for grouping articles in stacks of a predetermined number in which a wheel having serrated teeth picks off articles from the base of an infeed chute and places them on edge on a pair of inclined rails. The articles are held to the wheel by vacuum and are separated from the wheel by wedge members positioned adjacent the rails. A stack of articles builds on the rails and is slid into a conveyor bucket. After each predetermined number of articles is removed from the chute, a lever is actuated to hold the column of articles in the chute out of contact with the teeth to allow for advancement of the bucket conveyor.

Abstract: Extrusion apparatus including rotary shell having plural circumferential rows of extrusion orifices and a stationary inner member, defining with said shell, circumferential channels communicating with said orifices.