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1. (WO2018220366) POCKETED SPRING UNIT AND METHOD OF MANUFACTURE

Pub. No.:    WO/2018/220366    International Application No.:    PCT/GB2018/051469
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Thu May 31 01:59:59 CEST 2018
IPC: A47C 27/06
Applicants: HS PRODUCTS LIMITED
Inventors: SPINKS, Simon
CLARE, David
Title: POCKETED SPRING UNIT AND METHOD OF MANUFACTURE
Abstract:
A resilient unit has strings of individual coil springs (not shown) inside pockets (120) are arranged in an array. The strings together form a spring unit and are each secured to a common cover sheet S, which comprises a non- woven elastic fabric. It is welded ultrasonically or thermally whilst under tension in one or both of its major dimensions - i.e. in-plane - to the pockets (120), the material of which is substantially inelastic and non- woven. In this example the welds, labelled W, are located substantially centrally with respect to the generally circular end surfaces of the pockets.