not four alternative cutting edges are provided upon each of the blade members 172 and 174 fig1 14 show a third embodiment of a cutting apparatus of the present invention indicated generally by the numeral 228 as used with a flatlock machine the cutting apparatus 228 is substantially the same as the second embodiment just described in that hinge members 230 and 232 serve as spacers between two blade driving arms 234 and 236 and blade members 238 and 240 respectively the blade members 238 and 240 are counter rotated into a channel 242 of the flatlock machine arm 244 to shear a stitched fabric tape 246 as it emerges from a presser foot 248 actuation is provided by a fluid cylinder 250 piston rod 252 yoke 254 and pivot pin 256 upon which the blade driving arms 234 and 236 are mounted unlike the second embodiment the cutting apparatus 228 features an adjustment nut 258 which is located away from the blade members 238 and 240 and the hinge members 230 and 232 in this way the blade member 238 can be adjustably biased against the blade member 240 by the compression spring 260 from a position above and to the left of the flatlock machine and cutting apparatus 228 as shown in fig1 instead of being threaded into a vertical mounting plate as in the second embodiment the cutting apparatus 228 includes a hinge pin 262 which passes freely through a vertical mounting plate 264 a lock nut 266 is provided against the adjustment nut 258 to ensure.