Optical character recognition (OCR) and paper machine: what they have in common

1. Step 1. Optical character recognition (OCR) — uses — Image sensor. Scanning.
2. Step 2. Image sensor — is part of — Trackball. An optical sensor of the ball’s motion.
3. Step 3. Trackball — has part — Ball bearing. The ball rotates on supports.
4. Step 4. Ball bearing — is part of — Conveyor belt. The rollers turn on bearings.
5. Step 5. Conveyor belt — works like — Paper machine. Fourdrinier’s endless wire mesh moves like a conveyor belt, forming the web of paper.

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