Print Band Welding Fixture
Original Publication Date: 1989-Mar-01
Included in the Prior Art Database: 2005-Jan-27
Print bands having characters and timing marks etched thereon tend to exhibit slight lateral curvature due to internal stresses when cut into narrow strips prior to welding at their ends to form endless loops. The effect of this curvature on the printing alignment is rendered negligible by performing the welding with mating band ends held together on a curved fixture with a radius equal to that of the completed band. In the figure, band 1 is secured for welding on curved fixture 2 under welder head 3 by clamps 4. The clamps detect predetermined timing marks on the band surface, and then grip the band. Fixture 2 may be formed with recesses 5 to further decrease band constraint.