Toner fixing apparatus with a heat roller pressed by first and second pressing rollers

摘要

A fixing apparatus comprises: a heat roller (50) having a heat source (51) therein; and first and second pressing rollers (60, 70) arranged to sequentially be pressed against the heat roller (50) beginning with a more upstream pressing roller in a direction of rotations of the heat roller (50), wherein the hardness of the heat roller (50) is Hh, the hardness of the first pressing roller (60) is Hpl and the ratio of the hardness of the two rollers (60, 70) satisfies Hr1 = Hh/Hp1, the heat roller (50) and the first pressing roller (60) are structured in such a manner that the following condition is satisfied: Hr1≥1.5.