Generally, the alarm is that there is a problem with the ink cartridge, or it is not inserted properly.
The inventor of the copier, Chester Carlson (also translated as Chester Carlson), was originally a patent lawyer, part-time researcher and inventor. His job at the New York Patent Office required the copying of numerous important documents. Carlson suffered from arthritis and found copying files a painful and monotonous task.
This encouraged him to conduct experiments on Photoconductivity and estimated that photocopies could be made in the simplest way. Carlson conducted electrophotography experiments in his home kitchen and applied for a patent for the process technology in 1938. He created the first photocopying products using sheets of zinc masked with sulfur. He built the first "photocopying machine" using a zinc plate covered with sulfur.
The words "10-22-38 Astoria" were printed on a microscope slide that was held up to sulfur and exposed to strong light. After the slides were taken away, the mirror image of those words remained on the brimstone. Carlson planned to sell his invention to a number of companies, but the process was immature and failed to materialize.
Principles of Copiers
In that era, a large amount of copying work was done using carbon paper or copying machines, and people did not have strong demand for electronic copying machines. Between 1939 and 1944, Carlson was rejected by more than 20 companies, including IBM and General Electric, none of which thought there would be significant market demand for photocopiers. ?
In 1944, a nonprofit organization based in Columbus, Ohio, contracted Carlson to perfect his new process. Over the next five years, the agency conducted many experiments to improve the electrophotographic process. In 1947, Haloid (a small New York-based organization that manufactured and sold photographic paper at the time) approached Battelle to obtain a license to develop and sell a copier based on this technology.
Haloid realized that the term "electrophotography" was too complex and not very memorable. After consulting with a professor of classical languages ??at Ohio State University, Haloid and Carlson changed the name of the process to "Xerography," which is derived from the Greek word for "dry writing." Haloid decided to call the new copier "Xerox," and in 1948 Xerox became a trademark.