the.com/conveyor belt

means A continuous moving strip of material used to carry objects or people from one point to another without manual lifting or carrying.

from Built from two straightforward parts: 'convey,' from Latin conviare — 'to go together on a way' (via meaning road or path) — which by the 14th century had settled into English meaning 'to transport or carry'; and 'belt,' an old Germanic word for a girdle or strap worn around the waist, extended by the 19th century to mean any encircling band of material. Mechanical conveyor belts emerged with industrial manufacturing, when factories needed a tireless strap to move goods along a line faster than hands could pass them — the literal belt doing literally what its name promised.