Xerox 4000

Xerox 4000Created: May 26, 2015 12:41 pm by Admin
Modified: June 29, 2016 1:16 pm by Admin

In 1970 Xerox introduced the convenience copier Xerox 4000. It was a compact and quite copier, with two paper trays. This was the first copier in the world, that could copy on both sides automatically. The machine was also well suited for copying from bound volumes. Its exposure platen came right up to the edge of the machine allowing individual pages to be copied without having to open the book hat.

Later on the 4000 was produced with automatic or semi-automatic document feed, wich was a great success, especially in business offices for copying multipage unbound documents. This one feature changed the general configuration of copiers to the extent that there has never again been a true edge copier like the Xerox 4000.

In 1970, automatic density control (ADC) sensors were introduced with Xerox 4000 duplicators and subsequently used in various forms in the 5600 and 9200 families. Using the ADC sensors, somewhat frequent manual adjustments were made to the toner control

System test at Welwyn Garden City

System test at Welwyn Garden City

Toner and drums were tested to ensure manufacturing quality, in the test facility at Welwyn Garden City. In this photo you can see 3600, 4000, 7000 and 660 copiers.

Some advertisements of the Xerox 4000 copier:

 Xerox 4000 advertisment  Xerox 4000 advertisment


(Centimeter / inches) (K grams / Lbs) Floor Space Requirements (Meters/Feet)
Depth: 72 / 28
Width: 83 / 33
Height: 97 / 38
Weight: 95.5 / 210.6 n/a

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4 Responses

  1. Ed Jones-Mack says:

    Thanks for the memories! In 1972, i was hired as a service tech by Xerox and trained on the 4000. It had a remarkable feature set for its time- auto-duplexing, automatic density adjustments, dual 500-sheet paper trays, and fast duplicating. From a service standpoint, it could be a beast: a woefully underpowered drum cleaning system (when the doctor blade wasn’t going bad, the recycling chain was locking up), a developer housing that required regular micrometer adjustments to keep from scoring the drum, and a complex forefront set, one of which would.occasionally spark and cause random logic malfunctions. As another said, it was a job! (J also was trained on the 3100 before taking a promotion to train tech reps at Xerox University in Leesburg, VA.

  2. Ed Jones-Mack says:

    Correction in next to last sentence forefront set should read “corotron set”.

  3. Ted Schulze says:

    I still suffer from two 4000-induced medical conditions: “4000 knees” and “A-transport replacement lower back pain”! Thankfully I don’t have toner lungs, and I was finally able to clean out my fingernails!
    Oh yeah, also lucky to never get my fingers caught in the main drive chain!

  4. Mitch says:

    The trick was getting the dev. entrance chute to .008 inboard and outboard, along with the charge, transfer and detack wires. It could actually do fair solids! Take the rear exhaust fan and turn it backwards while taping the air filter to the back of the machine to filter air going into the machine. Mirrors kept collecting dust too quickly. Snipping the ends of the doctor blade to make them go thinner at the end foam gasket., kept toner from creeping down into the charge corotron. Final impression was that they put the prototype into production, as there wasn’t a screw that wasn’t adjustable.

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