Abstract: Ensuring proper compass and register positioning during printing. Marks are imprinted on a carrying element and at least one sensor is present to detect the marks on the carrying element and a second sensor detects a seam on the carrying element. A control mechanism receives mark values from the first sensor and seam values from the second sensor, and discarding mark values when the seam is detected.

Abstract: In an electrical anti-short bushing comprising a tubular portion and an outwardly extending flange portion presented by one end of the tubular portion, the bushing which is of split form having a discontinuity extending throughout its axial length is provided with two outwardly projecting, circumferentially spaced ribs which extend axially from the flange portion along at least a portion of the tubular portion of the bushing, with the part of the tubular portion between the ribs being diametrically opposite the axially extending discontinuity.