Retracted pocket spring mattress; method for manufacturing of a pocket spring mattress and device for pre-tensioning pocketed coil spings
AssigneeStjernfjadrar AB
InventorKenneth Edling
Life of this patent
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Abstract
The present invention relates to a spring mattress comprising springs enclosed in casings, a so-called pocket mattress, and a method and a device for manufacturing such a mattress. The spring mattress according to the invention comprises a plurality of interconnected coil springs (1) enclosed in casings (2), for at least one of the springs, the casing portions arranged at the spring ends being moved towards each other, through the spring, and interconnected with the aid of connecting means.
Claims42
A spring mattress comprising:
- a plurality of interconnected coil springs;
- casings individually enclosing at least two of the springs, each of said casings having a longitudinally continuous casing portion arranged at the upper end and a different longitudinally continuous casing portion arranged at the lower end of the at least one of the springs, said casing portions being moved towards each other, through the at least two of the springs, and being interconnected with the aid of connecting means, thereby biasing each of the at least two of the springs.
A method for manufacturing a spring mattress comprising a plurality of interconnected coil springs enclosed in casings, comprising the steps of:
- enclosing the springs in a casing material, said casing material having casing portions arranged such that a longitudinally continuous casing portion is arranged at an upper end and a different longitudinally continuous casing portion is arranged at a lower end of the at least one of the springs;
- biasing at least two of the springs;
- and
- interconnecting the springs,
- the step of biasing the at least two of the springs comprising the steps of moving said casing portions arranged at ends of each of the at least two of the springs towards each other, and interconnecting said casing portions by means of connecting elements.
A device for biasing coil springs enclosed in casings, comprising:
- inserting means provided at a first longitudinally continuous casing portion arranged at first end of a first spring to be biased;
- and
- counteracting means arranged at a distance therefrom at a second longitudinally continuous casing portion arranged at a second end of said first spring to be biased, the inserting means and the counteracting means capable of moving towards and away from each other to bring said first and second longitudinally continuous casing portions towards each other through the spring to be biased;
- and
- fixing means for arranging fixing members which interconnect the first and second longitudinally continuous casting portions from the two spring ends.
Dependencies are inferred from the claim text.