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Printer Supplies & Accessories

Print Heads

Print Heads Article

Line printers, as the name implies, print an entire line of text at a time. Three principal designs existed. In drum printers, a drum carries the entire character set of the printer repeated in each column that is to be printed. In chain printers (also known as train printers), the character set is arranged multiple times around a chain that travels horizontally past the print line. In either case, to print a line, precisely timed hammers strike against the back of the paper at the exact moment that the correct character to be printed is passing in front of the paper. The paper presses forward against a ribbon which then presses against the character form and the impression of the character form is printed onto the paper.

Comb printers represent the third major design. These printers were a hybrid of dot matrix printing and line printing. In these printers, a comb of hammers printed a portion of a row of pixels at one time (for example, every eighth pixel). By shifting the comb back and forth slightly, the entire pixel row could be printed (continuing the example, in just eight cycles). The paper then advanced and the next pixel row was printed. Because far less motion was involved than in a conventional dot matrix printer, these printers were very fast compared to dot matrix printers and were competitive in speed with formed-character line printers while also being able to print dot-matrix graphics.

Line printers were the fastest of all impact printers and were used for bulk printing in large computer centres. They were virtually never used with personal computers and have now been replaced by high-speed laser printers.

The legacy of line printers lives on in many computer operating systems, which use the abbreviations "lp", "lpr", or "LPT" to refer to printers. The dot matrix is really slow and it is only for office printers

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HP 14 Printhead : OfficeJet 7130 7110 7100 Printer Refb
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HP 14 Printhead : OfficeJet 7130 7110 7100 Printer Refb
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HP 14 Print Head : OfficeJet 7130 7100 D145 D135 D125
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Epson LX-800 Printer head
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HP 14 Color Printhead OfficeJet 7110 D155 D135 D125 610
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IBM 57P2170 4" 300 dpi Printhead for InfoPrint 6700
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Okidata 390/391 24pin Refurbished Printhead *Warranty*
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Okidata 380 Refurbished Printhead *Warranty*
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New Genuine OEM HP 10 CYAN C4841A Inkjet DATE 09/2008
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Print Head for Canon QY6-0055 fits i9900 Pixma Pro9000
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MT-MPX70-01 Material Template for MPX-70, MPX-80 Metaza
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203 dpi Thermal printhead Sato 8400S / M8400S brand new
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MPX-60 METAL PRINTER
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HP 14 Used Print Head Set - Cyan, Black, Magenta,Yellow
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MICROBOARDS PRINTHEADS for MX1 MX2 PF-PRO (Set of 4)
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HP 11 Printhead Black NIB Free Shipping
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Brand New HP 88 2 Printhead C9381A C9382A 4 L7590 L7650
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Genuine HP 5500 #81 Dye Print Head Full Set *FRESH*
$365.00
HP 14 Print head : OfficeJet 7130 D155 D145 D135 D125
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Replacement Yellow Ink Cartridge for HP C4838AN New
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NEW GENUINE HP 11 C4813A HP11 OEM YELLOW PRINTHEAD!
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2008 SET 4 HP #12 PRINTHEAD C5023A-C5026A BUSINESS 3000
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C3968A Color 5M Transfer Kit for LaserJet 5
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IBM 4224 Print Head
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Zebra printhead print head G41001M . Brand new. Sealed.
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NEW GENUINE HP 88 CYAN/MAGENTA PRINTHEAD C9382A EXP 08#
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KYOCERA THERMAL PRINTHEAD for Monarch 9820 =)
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HP 14 Color Printhead OfficeJet 7130 D145 D135 D125 612
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ZEBRA PRINTHEAD PRINT HEAD Z4M Z4000 Z4M+ 203DPI
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HP 14 Print head : OfficeJet 7130 D155 D145 D135 D125
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New HP 88 4 ink 2 Printhead set K5400 K8600 L7590 L7650
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Diebold ATM cash Dispenser cassette NEW 49-208502-000C
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NEW GENUINE HP 88 CYAN/MAGENTA PRINTHEAD C9382A EXP 08#
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HP 10 Printhead Set c4800a, c4801a, c4802a, c4803a NEW!
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NEW IN BOX CANON PF-02 PRINTHEAD FOR iPF9000
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NEW HP 10 C4841A Cyan Ink Cartridge Genuine
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HP 14 Color Print head OfficeJet 7130 7110 7100 Printer
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Intermec Printhead (406 dpi, 2.5 Inch) 062705S-001
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NEW GENUINE HP 11 YELLOW PRINTHEAD C4813a NEW #A
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NEW GENUINE HP 11 YELLOW PRINTHEAD C4813a NEW #B
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HP 10 Black Ink Cartridge Factory New
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