Abstract: A process of producing a moulding by introducing thermoplastics material into a mould space through gate means having a passageway, which process includes the formation of a sprue in the passageway. A retractable member cuts off the sprue before the material solidifies and closes the passageway at its junction with the mould space, the sprue being subsequently ejected from the passageway of the gate means before the next moulding cycle. A holder provides the gate means and the retractable member which is preferably inclined to the passageway. The gate means may also provide air ejecting means for removing the sprue and may conveniently be bolted onto an otherwise conventional injection moulding machine. The retractable member may incorporate a feed pipe for injecting a fluid into the plastics material.

Abstract: A swivel mounting for an instrument or apparatus, e.g. a visual display unit monitor, comprises two interconnected parts, one part, in use, being associated with an instrument or apparatus, and the other part being intended to remain stationary relative to a fixed surface, if necessary by fixing. The two parts have mating spherical surfaces which are capable of relative sliding movement to enable the instrument or apparatus and the one part to be rotated selectively about a vertical axis and a horizontal axis, relative to the other part.