friction or power driven has a continuous peripheral slot 32 edges 33 34 of each of the punches 31 and slot 32 respectively lie in planes perpendicular to the axis of the respective roll 26 27 and are sharp cutting edges capable of cooperating to shear a slug 28 from the web 17 as the tee 10 passes between the rolls the slug 28 is formed with edges 36 that are cut free of the main part of the web 17 and are parallel to the longitudinal axis of the tee 10 longitudinal ends 37 of the slug 28 as shown in fig4 a taken in a plane corresponding to the plane 4 a u2014 4 a in fig1 remain attached to the main part of the web 17 as seen from fig2 a the slug 28 at this first forming stage has a center part which is completely displaced from the plane of the web 17 this slug formation leaves a corresponding hole 41 in the web 17 fig3 depicts a second stitch forming station encountered by the tee 10 as the tee is advanced through successive stitch forming stations a pair of opposed rolls 43 44 are suitably rotationally mounted at this station with their axes in parallel relation to each other and.