Machine with removable unit having two element electrical connection

A machine for performing at least one function comprising a main frame and at least one unit insertable into and removable from said main frame for cooperative association therewith in producing said at least one function, said main frame and said removable unit having at least one electrical connection to conduct electric current therebetween comprising two electrical contacting elements, one on each of said main frame and said removable unit, a first contacting element comprisng a plurality of resiliently flexible conductive fibers arranged in a brush-like configuration and the second element comprising a substantially continuous conductive contact surface for electrical contact with said brush each of said contacting elements being connected to an electrical component, said contact surface comprising a pultruded composite member comprising a plurality of small diameter conductive fibers in a polymer matrix said plurality of fibers being oriented in said matrix in a direction substantially parallel to the axial direction of said member and being continuous from one end of said member to the other to provide a plurality of potential electrical contacts to each end of said member.