US 11,267,691 B2Granted

Apparatus for manufacturing an innerspring unit comprising pocketed springs

AssigneeSpuhl AG

InventorAndreas Fischer

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Abstract

In order to manufacture an innerspring unit (31) comprising pocketed springs and having an increased stability at its edge regions, in a first step, an innerspring main body (30) comprising a plurality of first strings (14) of pocketed springs is provided. In a subsequent second step, at least one second string (13c, 13d) of pocketed springs is attached to a lateral surface of the innerspring main body (30), so that the at least one second string (13c, 13d) of pocketed springs extends in a longitudinal direction of the innerspring main body (30). The springs (13) of the at least one second string (13c, 13d) 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 (30). The at least one second string (13c, 13d) of pocketed springs forms together with the innerspring main body (30) the innerspring unit (31).

Claims12

Dependent claims

An apparatus for manufacturing an innerspring unit comprising pocketed springs, the apparatus comprising:

(a) a first station for manufacturing an innerspring main body from a plurality of first strings of pocketed springs;
and
(b) a second station for 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 the second station comprises a compression device for compressing the springs of the at least one second spring prior to attaching the at least one second spring of pocketed springs to the innerspring main body, wherein the second station is configured to allow the compressed springs to expand after attaching the at least one second spring of pocketed springs to the lateral surface of the innerspring main body.

1 more element

Dependencies are inferred from the claim text.