Where it all began

The belt conveyor is a conveyor belt which is constantly supported and driven by idlers rollers. This is widely used in the mining and quarrying industry to transport bulk products at an industrial rate from point A (extraction point) to point B (storage point, factory..).

Its economic and robust aspect, its ease of maintenance as well as its performance explain its democratization in the field.

However, at the time of its establishment, industrial design neglected a fundamental aspect of the design cycle, namely, the analysis of the risks to all labors around the conveyor.

convoyeur non confiné
Global layout of conveyor highlighting all nip angles

Indeed, the movement of the belt on the rotating rollers intrinsically gives rise to what are commonly called in the middle, re-entrant angles, nip point.

Harmless at first glance, simple contact with one of the two moving surfaces can run the risk of inexorably dragging between the rollers and the loaded belt a body or object, thus risking amputation or even crushing.

Over the years, the number of accidents, often fatal, caused by the conveyor belt represented an alarming statistic with French regulations.

This is how the regulations around nip angles were written and proposing in his writings the innovative ideas of Mr René Brunone to guarantee the safety of workers in the field.

What does SPAR mean?







The primary reason for the SPAR range is to exist for the safety of workers as well as the protection of conveyors by eliminating the danger represented by nip angles, and this without altering the proper functioning of the initial system.

SPAR solutions for close protection from nip angles :


SPAR 2 - Head Pulley Protection


SPAR 4 - V-Plough Rock Deflector


SPAR 5 - Patins de Glissement