One of the first automated pieces of equipment I designed is used to apply an assembly lubricant to transmission seals. The lubricant prevents the lips of the seal from folding over while being installed on the transmission shaft of automobile engines.
The cell used a small robotic arm to pick the seals from an entry conveyor, apply the lubricant, and place the coated seal on an exit conveyor. The seals are loaded in a magazine on the front of the machine and fed in as needed. The lubricant is applied with an atomizing spray nozzle. The lubricant itself being a teflon suspension in alcohol.
A variant of this cell applied a gel lubricant instead of a spray lubricant. The gel had a UV active ingredient which was used for inspection of each seal before ejection from the work cell.