Recent Improvements in the Bell & Howell Fully Automatic Printer
A. S. Howell, R. F. Mitchell · Journal of the Society of Motion Picture Engineers · 1934
The results of a year of experience with the engineering model of this printer in actual production printing are outlined. The actual constructional changes that have been made in the printer are described and illustrated, and new developments that enable prompt and accurate sensitometric control to be maintained under production conditions are outlined briefly.