(under subclass 18) Apparatus in which the work is comprised of a single element, or a stack of single elements, each element being extremely thin in relation to its length and breadth.
(1) Note. The individual elements in a stack must be held together only by the forces of gravity and friction. For example, devices for pushing blocks comprised of laminated sheets, each joined to the adjacent sheet by means of an adhesive, would be classified in subclass 18 above.
