US 9,314,110 B2Granted

Backfolded pocket mattress

AssigneeStjernfjadrar AB

InventorRobert Ahlqvist

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Abstract

A pocket mattress includes coil springs arranged as spring units, arranged successively in elongate strings, enclosed in a covering material forming pockets. A plurality of the strings are arranged side by side, the strings including a plurality of transverse seams arranged parallel to the longitudinal direction of the coil springs to separate the pockets. A middle portion of the transverse seams attaches at least a layer of covering material from either side of the spring unit to each other. At least some of the seams are back folded seams, in which the covering material proximate to an end portion of the back folded seams is back folded towards the middle portion of the transverse seams. As such, the back folded transverse seams each have at least one end portion attaching at least twice as many layers of covering material as in a corresponding transverse seam which is not back folded.

Claims10

Dependent claims

A pocket mattress, comprising:

coil springs arranged as spring units enclosed in a covering material forming pockets, the spring units being arranged successively in elongate strings, the mattress including a plurality of the elongate strings, interconnected and arranged side by side, the elongate strings including a plurality of transverse seams arranged parallel to a longitudinal direction of the coil springs to separate the pockets, wherein a middle portion of the transverse seams attaches at least a layer of covering material from either side of one of the spring units to each other,
and wherein at least some of the transverse seams are back folded transverse seams, in which the covering material in proximity to an end portion of said back folded transverse seams is back folded towards the middle portion of the transverse seams, said back folded transverse seams each including at least one end portion attaching at least twice as many layers of covering material as in a corresponding transverse seam which is not back folded.

Dependencies are inferred from the claim text.

Facts

Application: 14/648,923Filed 12 Dec 2013
Priority: EP 1219808419 Dec 2012
Published: US 2015/0313371 A15 Nov 2015
Granted: 19 Apr 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

A47C 27/064
Wrapped or otherwise protected: pocketed springs
A47C 27/063
Spring inlays or spring units therefor: wrapped or otherwise protected
B68G 9/00
Placing upholstery springs in pockets
A47C 27/07
Spring inlays or spring units therefor: attaching, or interconnecting of, springs in spring inlays