Upholstery support for the back of a vehicle seat

A method of forming upholstery supports, comprising:

• providing a plurality of basic forms, wherein for each basic form, the basic form includes at least two sections, with one of the sections being a reference section and the other of the sections being an offset leg that extends substantially in a longitudinal direction, and the offset leg is offset in a transverse direction, and wherein the longitudinal and transverse directions are perpendicular to one another;
• separating an offset leg of a first basic form of the plurality of basic forms from a reference section of the first basic form;
• separating an offset leg of a second basic form of the plurality of basic forms from a reference section of the second basic form;
• forming a first reinforcing frame, which is different from the first and second basic forms, by mounting the separated offset leg of the second basic form to the reference section of the first basic form;
• and
• forming a second reinforcing frame, which is different from the first and second basic forms, by mounting the separated offset leg of the first basic form to the reference section of the second basic form.