MANUFACTURE OF POCKETED COMPOUND NESTED COIL SPRINGS.

摘要

A system and method for manufacturing pocketed compound nested coil springs (12) includes inserting a compressed, preferably pocketed, smaller coil spring (18) into a vertically oriented larger coil spring (24) either prior to compressing and inserting the outer coil spring (24) into pocket material (58) or after the larger coil spring (24) has been compressed and prior to being encapsulated in the pocket (14). Alternative systems and methods are also contemplated which include forming the outer coil spring (24) around the inner coil spring (18) and pocketing the resulting nested spring unit (12).