SERIAL PRINTING MECHANISM

摘要

In a serial printing mechanism for calculating machines, a type drum bearing a plurality of rows of types rotates for selection of the types whereas a cylinder has a plurality of projections disposed in the form of a helix and axially aligned with the rows of types. Impression means moves the cylinder towards the drum to cause one of the projections to strike against the selected type and to rotate the cylinder step by step to bring the projector sequentially into the striking position.