To ensure stable operation and high reliability in high-speed copying machines weighing over 100 kg, the structure and rigidity of the machine frame are critical. Canon conducts body-frame rigidity analyses and explores new ways to ensure the optimal design of body frames and parts. The results of these efforts are reflected in Canon's products.

For example, Canon was the first in the world to employ a monocoque structure for the bottom plate of a copying machine. The monocoque structure, which ensures the rigidity of the copying machine frame and is highly resistant to external forces, is the result of pressing together two 1.6 mm-thick steel plates, one of which is dimpled. Such a construction offers a flexural rigidity equal to that of a 10 mm-thick plate. By altering the shape, number, and layout of the dimples, as well as the materials used, the rigidity of the bottom plate can be further increased.