¶ THIS ILLUSTRATION SHOWS the American style Monotype bridge which holds the matrix case and it's carrier. The carrier positions the matrix to be cast. There are two rods running outwards from the carrier, one sideways to the left, the other to the back of the machine. These rods are moved into position by the locking jaws. The locking jaws are positioned by pins raised by air corresponding to holes in the controller paper.
The centering pin moves downward through the bridge, through the carrier and into the matrix cone hole opposite the face of the matrix. The centering pin holds the matrix gently but firmly on the mould.
Type metal is injected through the nozzle into the mould forming a type. The type is moved by a blade out of the mould into the type channel.