Spring Tube And A Spring Pack For Spring Mattresses

Abstract

A spring tube (1) encloses in known way a plurality of springs (2) arranged side by side, with facing parts of the wall (11) of the tube (10) joined, between one spring (2) and a subsequent spring, by welding lines (12), so that each spring (2) is contained in a portion (13) of tube (10), closed and separated from adjacent portions (13). The welding lines (12) have a predetermined minimum width (L) and are cut from one side of the tube inwards, so that each of the closed portions (13), containing a spring (2), can be compressed without any effect on the adjacent portions (13). this improves comfort while using a mattress manufactured with grouped spring packs (S) obtained from the spring tube (1). According to a second preferred embodiment, the spring tube (1) is cut along the welding lines at both sides.

Description

BACKGROUND OF THE INVENTION[0001]The invention relates to the technical field concerning the production of spring mattresses. In particular, the present invention relates to a spring tube and a spring pack obtained from the spring tube. The spring packs obtained from the spring tube are used to manufacture spring mattresses.DESCRIPTION OF THE PRIOR ART[0002]According to a widely used constructive technology, the springs use to manufacture spring mattresses are enclosed in a plastic tube, which keep them firmly side by side at a prefixed reciprocal distance. This is obtained by welding the facing parts of the tube walls comprised between adjacent springs to each other, for example by ultrasonic welding, so that each spring is contained in a portion of tube, closed and separated from the adjacent portions.[0003]Afterwards, the tube with the springs is cut into pieces to form spring packs having a selected length, and the spring packs are joined, side by side, so as to obtain an assemb...

AI Technical Summary

Benefits of technology

[0013]The object of the present invention is to propose a spring tube and a spring pack for mattresses shaped in such a way, as to avoid the above mentioned disadvantage, thus obtaining a homogeneous reaction of the springs independently from the load orientation and distribution.

[0014]Another object of the present invention is to propose a spring tube and a spring pack obtained by technologies and apparatuses analogous to the ones used for known spring packs, so as to keep the production costs at the same level.

Problems solved by technology

The disadvantage of the mattress obtained according to the above mentioned constructive technique derives from the fact that the assembly of springs does not resist elastically in homogeneous way, because the elastic reaction depends on whether the weight is applied prevailingly extending longitudinally or transversally.

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