A roll of buff tape in South Africa ( or whatever you call it in your own country ) is rolled between 2 rollers, with the sticky side on the outside.
When the tape gets to its end, you simple turn the thing over and roll it back again until the stickiness runs out.
You simply pull the full roll off and throw it in the bin, and put a fresh one on - you dont even get your hands dirty ........
An important part on each roller is a simple ratchet as shown in the pdf drawing, that turns freely on its mounting bolt.
This is to stop anyone pulling the device towards them - which ends up in a sticky mess !
I can't photograph the ratchets as this proto is now in England with my daughter !
The paint roller handle allows a broom handle to be used so you can use it standing up
Once you have figured out how to load it the right way round, its just a case of pushing it until the supply roller is nearly empty, and then turning it over and push it so that the tape goes back onto the empty roller again.
You can run it back several times until the stickiness runs out, or the roller is so big with fur that it starts jamming
Here's a clip of it in use
My intention for production would be to have the head with one roller above the other, in a nice casing, and rotate at each reversal ..
It wasn't to be
John Smith Cape Town overburg AT yahoo.com