Back in the 1960s, Gillette introduced what I believe was called the "TechMatic."
It was a "band razor" that used an extended strip of razor steel, rather than discreet blades. You "changed blades" by flipping a lever to advance the band from a small feed spool to a take-up spool.
The shaves were awful, I believe because it was impossible for the head assembly to hold the band perfectly flat. It bulged in spots, leading to scrapes and cuts (at least that was my experience as I can best recall).
One year, everybody in the fraternity house was using them. A year or two later they were all gone.
Has anyone else had experience with this Godawful thing?