Anti-Backlash Spring Clamp
Original Publication Date: 1979-Oct-01
Included in the Prior Art Database: 2005-Feb-20
This spring clamp apparatus is designed for use in a matrix printer, having pin-feed tractor 1 that is driven by square shaft 2, as shown in Fig. 1. The square hole (Fig. 2) in sprocket hub 3 is slightly oversized to facilitate the axial movement of tractor 1 along shaft 2. This oversizing, though desirable for the axial movement of tractor 1, leads to a backlash which may be detrimental to the print quality of the matrix printer.