Forms Tension Mechanism
Original Publication Date: 1986-Aug-01
Included in the Prior Art Database: 2005-Mar-09
A forms tension mechanism, as shown in Fig. 1, has a drag finger assembly 1 which is rotatably mounted around a shaft 2 to press against the drag bar 3. This tension mechanism applies a drag force to the forms as they are pulled across the platen by a pair of form feed tractors or the like. Referring to the figures, the drag finger assembly is generally L-shaped in cross-section and is rotatably mounted to pivot around locating shaft 2. A plurality of parallel, upstanding fingers 5 extend upwardly from the base of the drag finger assembly like the teeth of a comb. A resilient member forms a triangular spring 6 having one end attached to the drag finger assembly and the other end in contact with cam 7. The location shaft may be held by a pair of frames 8. The drag bar 3 may also be positioned in the frames 8.