Overview
This lecture explains how thermal printers work, their main components, and important considerations for using thermal paper.
How Thermal Printers Work
- Thermal printers produce images on paper by applying heat to special thermal paper.
- Heat turns parts of the white paper black, creating readable text or images.
- No ink or toner is needed; the process relies on chemicals within the paper.
Components of a Thermal Printer
- Thermal printers have a simple construction with a feed assembly that moves the paper using friction.
- The heating element is a single piece that extends across the width of the printing area and remains stationary.
- A feed roller, powered by a gear, pushes the thermal paper past the heating element.
Characteristics and Care for Thermal Prints
- Thermal printers are quiet, with the main noise coming from the paper feed motor.
- Exposure of thermal paper to heat sources will darken any affected areas.
- Some clear tapes can react with thermal paper, causing it to turn white where touched.
Thermal Paper
- Only special thermochromic (thermal) paper works with thermal printers; regular paper is unsuitable.
- Thermal paper has a glossy, different texture due to its chemical coating.
- Common uses include receipts, shipping labels, cash register and credit card terminal outputs.
Key Terms & Definitions
- Thermal Printer — A printer that creates images by applying heat to special paper.
- Thermal Paper (Thermochromic Paper) — Paper coated with heat-sensitive chemicals that change color when heated.
- Heating Element — The stationary component that applies heat across the width of the paper.
Action Items / Next Steps
- Handle thermal paper carefully: avoid heat sources and certain clear tapes.
- Ensure only thermal paper is used in thermal printers.