Cartridge Assembly Weld Strength Test
Original Publication Date: 1985-Sep-01
Included in the Prior Art Database: 2005-Feb-19
A tape cartridge has, as an assembly item, a plurality of weld points at the periphery of the box and cover-molded parts to a provided nonhermetic, but yet functionally stable unit. The calculated area of points welded is far in excess of that which would be needed to provide functional stability; however, the one area most critical to functional strength is at the leader block opening of the cartridge. A weld strength tensile test has been devised to measure the strength of the welded cartridge at the critical area, and to relate this strength to the parameters and conditions of manufacture. Fig. 1 shows the weld point of interest which must display a predetermined pull force or tensile value. Fig. 2 illustrates a tester and fixture or test jaw that is inserted into the leader block opening to perform the weld strength test.