1. InkJet and Thermal Printers

2. Inkjet Introduction InkJet Printing came about in the late 1980s InkJet Printing came about in the late 1980s Have become the replacement printer for the Serial Dot Matrix in the home Have become the replacement printer for the Serial Dot Matrix in the home Two Main Reasons: Two Main Reasons: Price Price Color capabilities Color capabilities

3. How it Works Produce characters by squirting a precisely controlled amount of ink onto the paper Produce characters by squirting a precisely controlled amount of ink onto the paper Dots are extremely small usually 50-60 microns in diameter (Human Hair approx 70 microns) Dots are extremely small usually 50-60 microns in diameter (Human Hair approx 70 microns) Dots are placed very precisely on the paper in a pattern up to 1440 x 720 dots per inch Dots are placed very precisely on the paper in a pattern up to 1440 x 720 dots per inch Dots can be different colors and can be of photographic quality Dots can be different colors and can be of photographic quality

4. The Printhead Printhead contains a series of Nozzles that put the ink on the paper Printhead contains a series of Nozzles that put the ink on the paper

5. Ink Cartridge Variety of cartridges depending on the Manufacturer of the printer Variety of cartridges depending on the Manufacturer of the printer Multi color in one cartridge Multi color in one cartridge Single color in one cartridge Single color in one cartridge Cyan, Magenta and Yellow Cyan, Magenta and Yellow Some cartridges include the printhead Some cartridges include the printhead

6. Heat vs Vibration Two basic methods of printing using an inkjet printer Two basic methods of printing using an inkjet printer Thermal Thermal Piezoelectric Piezoelectric

7. Thermal Used mostly by Canon and Hewlett Packard Used mostly by Canon and Hewlett Packard Also called Bubble Jet Also called Bubble Jet Tiny resistors create heat Tiny resistors create heat The vaporized ink creates a bubble which pushes the ink onto the paper The vaporized ink creates a bubble which pushes the ink onto the paper Typical Bubble Jet has 300-600 nozzles that can fire simultaneously Typical Bubble Jet has 300-600 nozzles that can fire simultaneously

9. Piezoelectric Patented by Epson Patented by Epson Uses Piezo Crystals at the back of the ink chamber Uses Piezo Crystals at the back of the ink chamber An electrical charge causes the crystal to vibrate An electrical charge causes the crystal to vibrate Crystal vibrates inward forcing ink out of the nozzle Crystal vibrates inward forcing ink out of the nozzle Typically 128 nozzles Typically 128 nozzles

11. Speed InkJet printer are NOT known for their speed InkJet printer are NOT known for their speed May be able to printer up to 16 PPM in black May be able to printer up to 16 PPM in black Usually takes a couple of minutes to print a color page Usually takes a couple of minutes to print a color page

12. Thermal Printing Two Types Two Types Direct Thermal Printer Direct Thermal Printer Thermal Wax Transfer Thermal Wax Transfer

13. Direct Thermal Transfer Printhead is a heating element Printhead is a heating element Special Paper that reacts to heat Special Paper that reacts to heat Head is passed over paper and heated at the exact moments required to form letters Head is passed over paper and heated at the exact moments required to form letters First Faxes used Direct Thermal Printing First Faxes used Direct Thermal Printing Now used in POS devices Now used in POS devices

14. Thermal Wax Transfer Utilizes a wax based ink that adheres to the paper during the heating process Utilizes a wax based ink that adheres to the paper during the heating process Wax Sheet is same size of paper being printed on Wax Sheet is same size of paper being printed on A wax sheet for each color A wax sheet for each color High quality but usually very expensive High quality but usually very expensive

16. Printing Review 4 Methods of Printing 4 Methods of Printing 6 Common parts of Printers 6 Common parts of Printers Know which are impact printers Know which are impact printers Know the parts of a laser printer Know the parts of a laser printer Know specifics of each style of printer Know specifics of each style of printer Know history of printing Know history of printing Know speed of different printers Know speed of different printers

17. Printing Review Contd Know how characters are formed in each method of printing Know how characters are formed in each method of printing Know which printers can print graphics Know which printers can print graphics Know quality of print from each printer type Know quality of print from each printer type