Glueless pocketed spring unit construction

摘要

Methods and systems for no-glue pocketed spring unit construction. Rows of pocketed springs, preferably arranged into modules of more than two pocketed springs surrounding a central hole, are ultrasonically welded together when paired vibrating probes and anvils press layers of pocketed spring fabric from the rows of pocketed springs together and a welding pulse is transmitted to the vibrating probe.

主权项

1. A method for glueless assembly of extended area cushioning units, comprising the steps of repeatedly:
loading first and second rows of pocketed springs onto first and second rows, respectively, of locator pins; wherein individual ones of said pocketed springs each comprise a coil spring in a pocket made of a flexible material; welding said first and second rows of pocketed springs together, with a relative alignment determined by said first and second rows of locator pins; loading said first row of pocketed springs onto said second row of locator pins, and loading an additional row of pocketed springs onto said first row of locator pins; and repeating said welding step to weld said first row of pocketed springs together with said additional row of pocketed springs.