When I was working for a major material-handling company some years back I was able to look at some of the engineering videos related to the design of luggage handling systems. One of the big challenges was keeping luggage from bunching up at choke points and stopping the whole line. Various solutions were tried to keep the luggage spaced apart, but the ones which were the most consistently successful were also incredibly abusive to the luggage.

I imagine similar solutions are used in the courier business.


M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8