Abstract: A fault indicator for a strip advancement mechanism comprising a base that defines a fault sensing portion of a path for at least a component of a strip, an element for bearing against a strip, or a component of the strip, while it passes through the fault sensing portion of the path, wherein the element is adapted to move from that bearing or non-fault position, to a fault indicating position in the event of the strip or the component of the strip ceasing to pass through the fault sensing portion of the path.

Abstract: A fault indicator for a strip advancement mechanism comprising a base that defines a fault sensing portion of a path for at least a component of a strip, an element for bearing against a strip, or a component of the strip, while it passes through the fault sensing portion of the path, wherein the element is adapted to move from that bearing or non-fault position, to a fault indicating position in the event of the strip or the component of the strip ceasing to pass through the fault sensing portion of the path.

Abstract: Refuse derived fuel is produced by taking raw refuse, pulverizing it and n screening it to remove fines and oversize material, the screened residue being passed to an air classifier where the light fraction, rich in paper and plastics, is separated. This light combustible refuse fraction is then passed to a densifying machine, either directly or via a secondary shredder, to produce partially compacted material which is then dried in a rotary dryer. The dried material can be passed to a second densifying machine which produces pellets in the form of small dense cylinders or blocks having a calorific value equal to about half that of coal. Coal dust or other combustible particulate material can be added to and mixed with the combustible fraction between the two densifying machines.