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PrinterArchive

Copiers & Reprographics

An encyclopedic cluster covering how photocopiers work and the evolution of reprographic technology — from pre-xerographic duplicating methods (mimeograph, spirit duplicators, diazo, photostat) through Chester Carlson's invention of xerography, the Xerox 914, and modern analog-to-digital copiers and multifunction devices. Focused on the electrophotographic process, its components, and document-reproduction history, treated vendor-neutrally and standards-first.

Planned cluster · long-term capacity 28–44

Entities

technology

Xerography · Electrophotography · Amorphous silicon photoreceptor · Mimeograph · Spirit duplicator · Diazo process · Photostat

concept

Chester Carlson · Photoconductor drum · Corona wire · Toner · Fuser unit · Selenium · Reprographics · Multifunction printer · Automatic document feeder · Electrostatic latent image

product

Xerox 914

organization

Haloid Company

brand

Xerox

Connected clusters

In the archive

Pages in this cluster

Planned coverage

  • How Photocopiers Work — Step-by-step walk through the electrophotographic cycle: charge, expose, develop, transfer, fuse, clean.
  • What Is Xerography? — Defines dry electrophotographic copying and why the term was coined, distinct from wet chemical methods.
  • How the Photoconductor Drum Works — Explains the light-sensitive drum's role in holding charge and forming the latent image.
  • Corona Wires and Charging in Copiers — How corona wires and charge rollers apply and neutralize electrostatic charge during copying.
  • How Toner Fusing Works in Copiers — The heat-and-pressure fuser step that bonds toner permanently to paper.
  • Analog vs Digital Copiers — Contrasts lens-and-mirror optical copiers with scan-then-print digital systems.
  • How Color Copiers Work — Four-pass and single-pass color reproduction using CMYK toners and separations.
  • What Is a Multifunction Printer (MFP)? — How copy, print, scan, and fax converge in one electrophotographic device.
  • How Automatic Document Feeders Work — ADF and duplexing ADF mechanisms for feeding multi-page originals.
  • Copier vs Printer: Key Differences — How copiers reproduce a physical original versus printers rendering digital data, and how the two converged.
  • How Electrostatic Latent Images Form — The physics of selective discharge on a photoconductor creating an invisible charge pattern.
  • Selenium and Photoreceptor Materials — Evolution of drum coatings from selenium to organic and amorphous-silicon photoreceptors.
  • The Invention of Xerography by Chester Carlson — Carlson's 1938 Astoria experiment and the path to a working dry-copying process.
  • The Xerox 914: First Plain-Paper Office Copier — How the 914 brought xerography to offices and reshaped document reproduction.
  • From Haloid to Xerox: A Company History — The commercialization of xerography and the firm's rename around the technology.
  • A History of Reprographics — Overview of document-reproduction methods before and after xerography.
  • Spirit Duplicators (Ditto Machines) Explained — The alcohol-transfer 'ditto' process and its distinctive purple output.
  • Diazo and Blueprint Copying — Light-sensitive ammonia-developed copying used for engineering drawings.
  • Photostat Machines and Early Document Copying — Camera-based photographic copying that predated dry xerography.
  • The Transition from Analog to Digital Copiers — How scanning, memory, and laser imaging turned copiers into networked MFPs.
  • Reprographics — Concise definition of the field of document and drawing reproduction.
  • Photoconductor — Defines the light-sensitive material central to electrophotographic imaging.