Eccentric 6 and lever 1 turn about fixed axes A and B. Lever 1 is connected by turning pair C to pawl 7 which engages ratchet wheel 2 rotating about fixed axis D. Roll 3 is rigidly attached to wheel 2. When lever 1 is raised by eccentric 6, pawl 7 slides upward over one tooth, and when lever 1 moves downward, pawl 7 turns ratchet wheel 2 together with roll 3. This feeds tape 5, squeezed between rolls 3 and 4, to the left.
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