Another digging by Doug Chu produced 1968 news paper article in which Mr. Halpern describes rosy outlook for the graphic arts supply business. (Thanks Doug)
This appeared on the Milwaukee Journal Jan 16, 1968 Click HERE for details
(you can read the whole article by simply moving the cursor around and move the page up and down.)
Mr. Halpern gives a bit of history here. Started manufacturing stencil in 1937, Started offset supply in 1948, and started presensitized offset plate manufacturing in 1952. Sales increased from $2.5 mil in 1957 to $20 in 1967.