Speed controlled printer

摘要

A manually operated dot printer designed for use in a pocket-sized calculator or a small-sized electronic device includes a printing head which is manually driven across the dot printer paper in one direction to store energy in springs. The springs return the printing head in steps intermittently while the printing head effects printing on the printing paper. The springs also feed the printing paper. While the printing head is manually moved, the printing elements are maintained out of contact with the printing paper. During return movement of the printing head, the printing elements are in contact with, or nearly in contact with, the printing paper for printing operations. The actual printing operations of the printing head are performed with electrical control using elements of low power consumption.