Abstract: A method for manufacturing a backrest and/or having a textile covering or the same, and mounted on a chair tubular chassis or the same includes the following steps: folding the lateral edges of the textile covering and seaming the edges to form lateral sheaths by a lateral seam line, affixing at least three visual markers, (notches), to at least one of the ends of each of the lateral sheaths, a first central notch at the lateral edge of each of the sheaths and two peripheral notches on both sides of the respective central notch, folding the free ends of the sheaths by fitting each central notch between the respective peripheral notches, such that the notches extend facing each other, seaming the free ends of the sheaths at the folding area of the notches by a transverse seam line, and turning over the textile covering by bringing out the corners.

Abstract: A method for manufacturing a backrest and/or having a textile covering or the same, and mounted on a chair tubular chassis or the same includes the following steps: folding the lateral edges of the textile covering and seaming the edges to form lateral sheaths by lateral seam line, affixing at least three visual markers, (notches), to at least one of the ends of each of the lateral sheaths, a first central notch at the lateral edge of each of sheaths and two peripheral notches on both sides of the respective central notch, folding the free ends of the sheaths by fitting each central notch between the respective peripheral notches, such that the notches extend facing each other, seaming the free ends of the sheaths at the folding area of the notches by a transverse seam line, and turning over the textile covering by bringing out the corners.