Lint Particle Seperation and Storage
These dryers have a particle separation chamber and combined with a very powerful blower they spin the lint out of the air-stream sending it through a vacuum cleaner sized tube into a bag also similar to a VCs bag where the lint is held till the bag is full. You could normally dry 20-50 loads before you either emptied or just replaced the bag. One of the main advantages of this system was that the blower was not trying to force air through a partly clogged lint screen which upsets the dryers performance and safety.
Whirlpool was big on using centrifugal particle separation in their major home appliances. They again used this type of lint separation their completely redesigned 29" combos that came out in 1961 and this time the machine not only collected the lint and held it and when the next cycle was started it was flushed harmlessly down the drain while the combo was automatically flushing the cold water out of hot water lines running to the combo, this flushing also helped warm the machine for a hotter wash.
WP also was using CPS in their Central Vacuums, so they had a bag less CV. I have had a WP built KM CV for over 30 years in my home and it works great, this is why I am not a vacuum collector this CV works so well that I have never felt the need for any other vacuum. Dyson eat your heart out, LOL.
WP again struck again with CPS when they introduced their legendary Power-Clean DWs and started building KM DWs [ Ultra-Wash ] in 1984. I believe this to be the best wash system EVER used in a home DW, as it not only produces very clean dishes but it gets rid of virtually ALL food residue. Other DWs like KA, MT RR, and the GE Pots-Scrubber also did a beautiful job washing dishes but all three left some food mess behind. When you dissemble a MT RR DW for example you usually find yucky food residue stuck around the filter, but when you take apart a WP PC pump you will not find a thimble full of food residue.
WP once again brought back the lint separator dryer in the mid1990s, this time it was dubbed the Easy-Clean 100 implying that you may not have to clean the easily removable filter for up to 100 dryer loads. While this dryer worked great it got paned by CRs because it was the noisiest dryer in the test because of the fact the blower ran at twice normal speed. It was a great dryer if you had a long vent system and frankly consumers were too stupid to realize any advantage and hulled the filter out and cleaned it every load anyway, LOL. This is a really cool dryer if anyone wants to collect a modern classic, I recently found a gas one that will end up in my home laundry center.