US 11,505,449 B2Granted

Method for manufacturing an innerspring unit

AssigneeSpuhl AG

InventorAndreas Fischer

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Abstract

In order to manufacture an innerspring unit comprising pocketed springs and having an increased stability at its edge regions, in a first step, an innerspring main body comprising a plurality of first strings of pocketed springs is provided. In a subsequent second step, at least one second string of pocketed springs is attached to a lateral surface of the innerspring main body, so that the at least one second string of pocketed springs extends in a longitudinal direction of the innerspring main body. The springs of the at least one second string of pocketed springs have a spring characteristic or a spring geometry different from the springs of the plurality of first strings of the innerspring main body. The at least one second string of pocketed springs forms together with the innerspring main body the innerspring unit.

Claims20

Dependent claims

A method for manufacturing an innerspring unit comprising pocketed springs, the method comprising the steps of

(a) providing an innerspring main body comprising a plurality of first strings of pocketed springs;
and
(b) attaching at least one second string of pocketed springs to a lateral surface of the innerspring main body, so that the at least one second string of pocketed springs extends in a longitudinal direction of the innerspring main body, wherein the springs of the at least one second string of pocketed springs have a spring characteristic or a spring geometry different from the springs of the plurality of first strings of the innerspring main body, the at least one second string of pocketed springs forming together with the innerspring main body the innerspring unit,
wherein step (a) comprises attaching a pair of fleece sheets to upper and lower surfaces of the innerspring main body, so that the fleece sheets cover the innerspring main body and laterally extend beyond the innerspring main body;
and
wherein step (b) comprises attaching the at least one second string of pocketed springs to the lateral surface of the innerspring main body such that it is arranged between the pair of fleece sheets.

3 more elements

A method for manufacturing an innerspring unit comprising pocketed springs, the method comprising the steps of

(a) providing an innerspring main body comprising a plurality of first strings of pocketed springs;
and
(b) attaching at least one second string of pocketed springs to a lateral surface of the innerspring main body, so that the at least one second string of pocketed springs extends in a longitudinal direction of the innerspring main body, wherein the springs of the at least one second string of pocketed springs have a spring characteristic or a spring geometry different from the springs of the plurality of first strings of the innerspring main body, the at least one second string of pocketed springs forming together with the innerspring main body the innerspring unit, wherein step (b) comprises compressing the springs of the at least one second string of pocketed springs prior to attaching the at least one second spring of pocketed springs to the innerspring main body and allowing the compressed strings to expand after attaching the at least one second spring of pocketed springs to the lateral surface of the innerspring main body.

Dependencies are inferred from the claim text.

Facts

Application: 17/521,060Filed 8 Nov 2021 · division
Published: US 2022/0055890 A124 Feb 2022
Granted: 22 Nov 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

B68G 9/00
Placing upholstery springs in pockets
A47C 27/062
Spring inlays or spring units therefor: of different resiliencies
A47C 27/064
Wrapped or otherwise protected: pocketed springs
A47C 27/066
Spring inlays or spring units therefor: edge stiffeners

Family

PCT/EP2017/063799Parent of this division · filed 7 Jun 2017
US 2022/0055890 A1Pre-grant publication · published 24 Feb 2022
Application16/619,998Parent of this division
US 11,267,691 B2Parent of this division
US 2021/0078855 A1Published application
US 11,505,449 B2This patent

From the US filing history. Foreign family members aren’t listed.