Single Axis Pivot Block
Original Publication Date: 1989-Jul-01
Included in the Prior Art Database: 2005-Jan-28
In band tracking, it is known to tilt the drive and idler pulleys in the side-to-side direction in order to keep the print band registered against the pulley flanges (see Fig. 1). Usually, the drive pulley has a built-in tilt, while the pivot block used to support the idler pulley has an adjustable eccentric nut on its support shaft that is rotated until the proper tile required for band tracking is obtained. The disadvantage with this simple eccentric adjustment is that any side- to-side tile also produces a slight amount of undesirable front-to-back tilt. This article describes an improvement to this device that eliminates this undesirable front-to-back tilt.