Tuesday, April 27, 2010
Do You Know Your Copy Machine History?
In an age where gadgets are commonplace, and the next-best-version rolls out before you’ve seen the first model, it’s refreshing to stop and smell the toner. You’ve printed those urgent reports, distributed them, and won the day: But do you know how it all came together? Here at World Trade Copiers, we’d like to think we’re history buffs in our area of expertise. So we’d like to share a little Copy Machine History 101: How Does a Copy Machine Work?
Welcome to your first, short lesson in xerography! (That’s copy lingo for the “dry photocopying.”) This will be fun, I promise. If you’ve ever wondered how a clean sheet transforms to a photo copy in mere seconds, here’s the breakdown: It’s a five-step technology patented in 1942.
Step 1: Charging
A wire surging with electricity charges a round drum made out of a material that’s photoconductive (receptive to currents when exposed to light).
Step 2: Exposure
The original copy is illuminated by a strong bulb, which reflects onto the drum. The drum picks up the whites of the page are picked up by the drum conductively, while the writing or dark figures on the page remain as negatives. The drum now carries an electrical imprint of the page.
Step 3: Developing
As the image or words on the drum remain negatively charges. As toner is positively charged, it is electromagnetically attracted to the imprint of these negatively charged surface area.
Step 4: Transfer
The drum, now with toner, rolls the pattern of toner onto a clean sheet of paper.
Step 5: Fusing
A quick blast of heat and another roll bonds the toner to the paper. Voila! A copy machine duplicate is born.