Selectric Resources

 

EXTERNAL RIBBON CONTROL OPERATIONAL THEORY

 

The external ribbon control is designed for customers with applications that require a lot of changes from black to red ribbon by allowing the operator to select stencil, black or red ribbon positions without lifting the cover.

 

The control lever is located on the left side of the carrier. The operation is similar to the impression selector lever (Figure 1).

 

The ribbon control lever is mounted with the ribbon control bellcrank inside the left-hand carrier casting. A wire link connects the control lever and the control bellcrank. When the control lever is moved front to rear, the control bellcrank pivots on its mounting stud. The control bellcrank causes the lift control lever to pivot. Connected to the lift control lever is the lift control link. The lift control link for the external ribbon control functions the same as the lift control link on the standard fabric ribbon mechanism.

Figure 1 — External Ribbon Control Mechanism