Pocketed spring unit and method of manufacture

US11412860B2 · kind B2 · utility

Assignee

• HS PRODUCTS LIMITED · GB

Inventors

• Simon Paul Spinks · Sherburn in Elmet, GB
• David Clare · Barnsley, GB

Key dates

• Filing date: May 30, 2018
• Grant date: Aug 16, 2022
• Expiry date: Jul 13, 2038

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A47C27/07
• WIPO field: Furniture, games
• WIPO sector: Other fields

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.