Patent ID: RE40644

Claim:
A copying system comprising: a scanner module formed as an independent frame, comprising, an image reading means for reading a manuscript picture by resolving a picture image into pixels and generating image data, a first data I/O means which is a first I/O interface for said image data and control data, and a first synchronizing signal generating means, for generating a first synchronization signal, comprising a first crystal oscillator, wherein said first I/O interface receives said image data and said first synchronization signal and transfers said control data to said image reading means and said first synchronization signal generating means, and said image reading means receives said first synchronization signal; a printer module formed as an independent frame, comprising, an image forming means for forming and outputting said image data as a permanent visual image on a recording medium, a second data I/O means which is a second I/O interface for said image data and said control data, and a second synchronizing signal generating means, for generating a second synchronization signal, comprising a second crystal oscillator, wherein said second I/O interface receives said image data and said second synchronization signal and transfers said control data to said image forming means and said second synchronization signal generating means, and said image forming means receives said second synchronization signal; and a system control module formed as an independent frame, comprising, a third data I/O means which is a third I/O interface for said image data and said control data, and a system control means for controlling said scanner module and said printer module synchronously and generating said control data; said third I/O interface transferring said control data to said first and second I/O interfaces; and said first and second crystal oscillator having substantially a same frequency, so that said first and second synchronization signals and said image reading and image forming means are synchronized with each other for maintaining coincidence between cycles and header phases of said image data that is read and formed.