Another interesting bit from the '88 patent:
...abrading station 18 includes the finish honing abrading means of U.S. Pat No 3,461,616 [aka the '69 patent] ... [misc stuff about how that station is configured elided] ... includes a resin bonded, hard, metallic oxide abrasive having an average particle size about 7 to about 9 microns.
That's for their finishing hone. They also describe the test runs of the '88 machinery
... a blade strip was fed through the stations at a speed of about 160 feet per minute. Wheels 20 and 22 were rotated in opposite directions at speeds of about 4500 rpm and wheels 120 and 122 were rotated in opposite directions at speeds of about 3600 rpm ... Representative average production rates were about 76,800 blades per hour... the average continuous time of operation for a series of test runs was about 8 hours but some test runs were run continuously without interruption for 8 hours or more without effect on the high quality of the blades...average production rates of double edge razors in online test production runs were about 36,000 blades per hour.

yowza!