Patent ID: 7196287

Claim:
A fuser of an image formation apparatus, comprising a fusing roll unit having a fusing roll and a pressurizing roll unit having a pressurizing roll and a resilient biasing member resiliently biasing said pressurizing roll, said resilient biasing member pressing said pressurizing roll into contact with said fusing roll as said pressurizing roll unit is secured to said fusing roll unit, wherein: said fusing and pressurizing roll units are secured by a pair of engagements provided at locations, respectively, sandwiching a plane including an axial line of said fusing roll and that of said pressurizing roll; of said pair of engagements, one engagement includes a hook provided at one of said units and an eye provided at the other of said units and capable of guiding and thus moving said one unit pivotably relative to said other unit when said hook is engaged therein; of said pair of engagements, the other engagement includes a protrusion provided at one of said units and a hole provided at said other of said units to receive said protrusion to secure said units together; said hole is provided at a projection projecting from said unit with said hole toward said unit with said protrusion; said projection has an end with a corner closer to said one engagement tapered; and said protrusion has an end with a corner closer to said unit with said hole tapered.