Patent ID: 9221670
Filing Date: 2015-12-29
Classification: A47C,B23K,B29C,B29L,B68G,Y10T

Abstract:
1. A method for glueless assembly of cushioning units, comprising: a) inserting one of at least one probe/anvil pair into openings in a first continuous row of connected multiple-coil modules, and inserting the other of said probe/anvil pair into openings in a second continuous row of connected multiple-coil modules; wherein individual ones of said modules comprise more than two pocketed springs which together surround one of said openings; and wherein individual ones of said pocketed springs each comprise a spring inside a pocket made of a flexible material; b) moving said probe/anvil pair together, and applying thermal power to said probe, to thereby weld said first and second rows of multiple-coil modules together at one or more locations; c) removing at least one of said first and second rows of modules from said probe/anvil pair; and repeating said steps (a), (b) and (c) until more than two rows of modules have been thereby welded together to form a cushioning structure having an extended area.