Canon LBP-CX Print Engine (1983)

What the Canon LBP-CX was

The Canon LBP-CX was a desktop laser-printer engine developed by Canon and introduced in 1983; the initials LBP stand for "Laser Beam Printer." Rather than a single famous consumer product, it was a self-contained print mechanism, comprising the laser optics, photoconductor drum, and developing and fusing systems, that Canon supplied both in its own LBP-8/CX printer (the original LBP-8) and as an original-equipment engine to other manufacturers. Later printers in the LBP-8 line, the LBP-8 II and LBP-8 III, moved to the successor LBP-SX engine rather than the CX. The engine produced 300-dots-per-inch output using a semiconductor laser diode and dry toner.

Significance: the engine behind the first mass-market laser printers

The LBP-CX is historically important less for its own sales than for the products built on it. In 1984 Hewlett-Packard released the HP LaserJet, widely documented as the first mass-market desktop laser printer, using the Canon CX engine under HP's own controller and Printer Command Language (PCL). A year later Apple introduced the LaserWriter, also based on the Canon CX engine but driven by Adobe PostScript. Because the two competing products shared one Canon engine, early LaserJets and LaserWriters used the same toner cartridges and paper trays.

Print method and technology

The engine used the electrophotographic (laser xerographic) process. A modulated semiconductor laser diode was swept across a rotating photoconductor drum to write a latent electrostatic image, which was developed with dry toner and fused to the page. Its defining consumable was an all-in-one cartridge that combined the toner with the photoconductor drum plus the charging and cleaning systems in a single replaceable unit, so the wear-prone parts were renewed with every cartridge.

Documented specifications

Reference records list the engine at 300 dpi. The HP LaserJet, the first printer built on the engine, was documented at 300 dpi and eight pages per minute. Figures that cannot be traced to an authoritative source, such as memory capacity, exact dimensions, or a precise discontinuation date, are omitted here rather than estimated.

How the engine reached HP and Apple

Canon's willingness to sell the engine as an original-equipment component shaped the early laser-printer market. Histories of the LaserWriter record that Steve Jobs of Apple had seen the LBP-CX while negotiating with Canon for 3.5-inch floppy-disk drives for the Macintosh, a contact that fed into Apple building its PostScript printer around the same mechanism. HP's simpler PCL approach let the LaserJet reach the market roughly a year before Apple's CX-based product and at a lower street price.

Place in laser-printing history

The Computer History Museum describes Canon's next mass-market laser engine, the LBP-SX, as the basis for the relabeled HP LaserJet II and Apple LaserWriter II. The CX-generation engine therefore sits at the start of the desktop laser lineage, establishing the shared-engine and all-in-one-cartridge pattern that characterized 1980s and 1990s laser printing.

Reference scope

This page records only facts traceable to authoritative or reputable reference sources: manufacturer service documentation, museum and archive records, and encyclopedic histories. Any specification that cannot be sourced is omitted rather than estimated. It is not a buying guide and quotes no current pricing or availability; the sources consulted are listed below.