Multiple range variable magnification reproduction machine

Abstract From the Canadian patent

A document reproduction machine having a multiple range of magnifications employs a scanning optical system which is controlled as to scanning speed and distance of travel by the selected magnification. In the higher reduction copying ranges the speed of the scanning optical system is automatically increased in proportion to the selected magnification reduction but the, increase in scanning distance is limited to the platen size. Multiple cams are employed for each range of magnification and, means are provided to change the scanning drive means between the multiple cams.