Abstract: Disclosed is economical and reliable apparatus for precisely intermittently feeding prescribed finite-lengths of edgewise perforated carrier sheet material. The intermittent feeding apparatus basically requires a rotatable drum having its cylindrical surface provided with circularly arrayed radially extending prongs that are removably engageable through the carrier edgewise perforations and which drum is intermittently rotated for a prescribed angular-value cycle so that the drum prongs feed the carrier for an approximate-length roughly equivalent to the desired exact finite-length. At the conclusion of each incremental rotation for the pronged drum, a camming assembly (having a camming first-component circularly arrayed around the drum and having a camming second-component mounted to a reciprocatable piston) rectifies the approximate-length carrier feed into the exact finite-length feed desired for the carrier sheet material.

Abstract: Knotting devices for tying incrementally fed string into overhand knots comprises a pair of sturdy opposed angular bills extending uprightly as stalks from a manipulatable shank and the bills including opposed horns laterally extending from the stalks and at a transverse fixed-spacing. Once the string increment is looped around the horns, its trailward-length is resiliently grasped by a retainer means located between the horns to form a noose. Following severing of the string trailward-length, its lead-end is pulled away from the knotting device and the noose slips off the bill horns fore-ends, and finally the retainer means is released thereby resulting in the overhand knot.