Issue No.09 - September (1975 vol.8)
J. Tschinkel , Potter Instrument Company
While the impact printer has been developed to a very high level of performance in terms of printing quality and speed, no fundamental changes have been made to the printed format. All printing is currently done, as it has been for years, on the "standard" computer form measuring 11 inches high and 14-7/8 inches wide. Typically, a line is 132 characters long; there are 6 lines per inch and the characters are generally upper case only. The paper is fan fold, available in various thicknesses or weights, and is multi-formed with interlaced carbon.
J. Tschinkel, "A New Concept in Impact Printing", Computer, vol.8, no. 9, pp. 28-36, September 1975, doi:10.1109/C-M.1975.219072