hemmer intended for making double folded hems by feeding a fabric edge through the device comprising at least a folding edge a main bar and a folding rule arranged at a distance above the main bar the main bar front end being bevelled and designed to fold the fabric edge around the folding rule with the hem edge located between the main bar and the folding bar and in its second rear part the main bar being designed with an upfolded longitudinal edge section which partly is arranged to extend along and over the rear longitudinal edge of the folding bar and partly is bevelled at its front section the hemmer in one embodiment may be adjusted to fold hems of different widths and hems which already have transverse hems application_number US 49553083 A description the hemmer 10 consists essentially of four parts a main bar 11 a folding rule 12 an edge bar 13 and a protection rail 14 since the last mentioned device mainly only has a protective function it will henceforth be omitted in the disclosure of the hemmer the main bar 11 consists of a plate profile which has an l formed cross section the rib planar part 15.