The rivets were used because OSHA (or the Illinois version of said same) banned the use of the type of glue Ludwig used on the seam (which was apparently different than what was used to glue it to the shell). There was no other adhesive available at the time that worked as well so they used a combination of rivets and another "OSHA-friendly" adhesive on the seams, which is why the rivets were found on both pearl wrapped and COW drums.
OSHA was the reason for staples, that's what the Chief told me. And, it was no longer his problem after he sold the business in 1984, it was Selmer's problem.
As for free rewrapping for 30+ year old drums, I doubt there's a lifetime warranty on drums from any company in 1980.
I wonder if Gretsch will fix those darn tom toms I can't get drum heads to fit on?
