Frame for sewing upper pillows on covering shells for mattresses, machine for sewing upper pillows on covering shells for mattresses, and method of sewing upper pillows on covering shells for mattresses

摘要

A frame (1) for sewing upper pillows (A) on covering shells (B) for mattresses (C), which comprises four perimetric walls (3); each wall (3) is perpendicular to the two contiguous walls (3) and comprises at least one laminar portion (4) that constitutes a resting surface, the laminar portion (4) being co-planar with a lower edge of the respective wall (3), at least one of such walls (3) comprising at least one locking element (5) for at least one component, selected from between an upper pillow (A) and a covering shell (B), arranged on a respective laminar portion (4).