Eccentrically mounted gear 1 rotates about fixed axis B and meshes with gear 8 which rotates about axis C. Gear 8 meshes with gear 5 which rotates about fixed axis E. Links 7 and 11 are connected by turning pairs to gears 5, 8 and 1. Link 7 turns about axis E. Carrier 9 is rigidly attached to gear 5 and mounts two planet gears 10 of equal pitch diameter and meshing with each other. On the same axis with gear 5 is fixed gear 12 which has the same pitch diameter as gear 5. When carrier 9 rotates, planet gears 10 roll around gear 12 and point A of link 2, which is rigidly attached to upper gear 10, describes complex path a having nine points of self-intersection. When gear 1 rotates at uniform velocity, gear 5 with carrier 9 rotates at nonuniform velocity. Point A of link 2 travels along path a and periodically pushes moving paper strip 4 against knife blade 3 which cuts the strip.
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