| 13. A link for a conveyor chain, comprising; a main base body; two shoulders protruding upward and at lateral ends of transverse
sides of said main base body, said shoulders being arranged parallel to an advancement direction of the chain; first and second
seats being formed on said shoulders and being mutually aligned along an axis which is longitudinal with respect to said main
base body and transverse with respect to the advancement direction of the chain; a pair of first and second shafts having
ends thereof associated with said first and second seats; a plurality of first free rollers being rotatably associated with
said first and second shafts and being arranged on a same arrangement plane which is parallel to a plane of arrangement of
a surface of said main base body from which said two shoulders protrude; at least one pair of first supporting elements that
protrudes upward from said main base body, said at least one pair of supporting elements being constituted by two protrusions,
said at least one pair of supporting elements being arrangeable on transverse plane that may be the same of the arrangement
plane of said two first and second shafts, each one of said protrusions having, in plan view, a rectangular shape and being
arranged parallel to said pair of shoulders in a position which is mirror-symmetrical with respect to a central axis that
lies transversely to said main base body, the link further comprising: at least one third seat and second roller, each one
of said protrusions having, in a side view, a shape of an inverted right-angled trapezoid, in which a shorter parallel side
is directed upward and a longer parallel side is rigidly coupled to the main base body, said at least one third seat being
formed above each one of said protrusions at the shorter parallel side and having a semicircular cross-section, complementarily
shaped lateral surfaces of said at least one second roller interacting on said at least one third seat in a loaded condition
of the link, said at least one second roller being further axially perforated and having a smaller diameter than said first
rollers and said at least one third seat.
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