alternative to donkey back rollers

[LabelMan]

Good evening to all,

I wanted to try to build a conveyor belt, but I was wondering if there were any alternatives to the donkey back rollers that could not move the tape.
I wanted to avoid panel or trapezoidal profile slides glued below the tape.
Maybe there's something mechanical that can help me, but I don't think of anything.

 

[meccanicamg]

We discussed it in many posts. There is a beautiful habasit guide with explanations.
first you need to understand the size of the conveyor belt. if it is wider than long it takes force the trapeze guides in the rollers.
Otherwise you can work with various systems even combined, side rolls put of e.g. or the rollers to embrace the drums.
However the conical trunk roller is obligatory to keep the tapes on track... and there are rules.quiqui