Mattress of wharves Consists more or less of a block of wharves covered with wadding layers that isolate the wharves of the body. The new models offer systems like the one of pocketed wharves that guarantee independent rest for each zone of the body. The dual firmness allows to adapt each side of the bed to concrete tastes or differences accused of weight. 1 – Wharves biconical. He is most habitual.
Its nucleus consists of a housing composed by wharves made with iron wire of a thickness of around two millimeters. These pay attention to the part superior and inferior to a rod of steel contour. The housing usually is protected by means of a fiber mantle to which a polyurethane foam plate can be added. In their corners foam reinforcements are fitted to equip to him with greater consistency. On her, the covers are placed.
The cover is composed by a fabric of varied material and design (Damascus, I itched, et cetera) that is quilted with one or several polyurethane foam plates or, more recently, of latex. In the end, the firmness of the mattress will depend on the height of the housing as well as of the number and densidad of cushioning plates that contains. Platabandas lateral also is quilted in the same fabric and they stick close to the covers by means of draught excluders. In platabandas, orifices practice or ventilation valves are inserted that allow the circulation of the air during the night. The mattress it can reinforce supplementing material (fiber mantle, foam plate, etc.) in certain zones. Thus it is made occasionally in the lumbar third and more rarely in the cervical and podal zone. 2 – Cylindrical wharves the wharves have cylinder form. Usually they go ensacados to avoid annoying sounds because of the friction. Each wharves are surrounded in textile material. What allows that exists a certain degree of independence in the movement of each one of the wharves.