New Gerneration Rainbow has arrived
Jeff,
If you are a vacuuum collector you will understand that the air-flow and nozzle design does a lot of the cleaning. Try running an old Hoover off the edge of the rug and you see the tremendous air flow that moved the dirt. Also look at the desgin of the floor tools even with the first Rexairs. They were all about air flow not just suction. This is the part that is interesting about the older machines to me.
The vacuum companies had to change with the coming of man made carpets and rugs,but you can see the influence of unique design even in the early Rexairs and they too had no loss of suction.