table mechanism 5 to be jetted out of the air jetting apertures 16 to slightly float the fabric 2 above the surface panel 12 of the air table 4 while maintaining a condition in which friction between the fabric 2 and the surface panel 12 of the air table 4 is minimized peripheral edges of the fabric 2 are slightly pressed and moved in the direction of the guide member 11 and then an edge of the fabric 2 is nipped between the forwarding teeth 57 of the sewing machine head 19 and the fabric edge pressing tool 58 next the foot switch 22 is turned on in response to the activating signal the controller unit 56 activates operation of a pneumatic cylinder of the supplementary roller unit 7 to cause the roller elevating plate 26 to descend to bring the supplementary feed roller 27 into contact with the upper surface of the fabric 2 simultaneous with the contact of the supplementary feed roller 27 with upper surface of the fabric 2 the servo motor 30 of the supplementary feed roller unit 7 the drive motor 21 of the sewing machine head 6 and the flange forwarding drive motor 51 of the flange supply unit 10 are respectively turned on to enable the sewing machine head 19 to perform a sewing operation at a speed identical to the forwarding speed of the supplementary roller 27 of the supplementary feed roller unit 7 simultaneously flange 9 unwound from the flange reel 44 is delivered to the sewing machine head 19 via the supply passage 45 when the flange 9 is fully sewn on linear peripheral edges of the fabric 2 processing of the peripheral selvedges.