Patent ID: 9213274
Filing Date: 2015-12-15
Classification: G03G

Abstract:
1. A grinding roller for use in a fixing device including a pair of rotary fixing members that rotate while being pressed against each other to form an area of contact, and heat and press a recording medium carrying an unfixed toner image and fed to the area of contact, to thereby fix the unfixed toner image on the recording medium, the grinding roller configured to grind a surface of a toner image-side rotary member of the pair of rotary fixing members that comes into contact with the unfixed toner image, the grinding roller comprising: an abrasive grain layer including abrasive grains, forming a surface layer of the grinding roller, and having a surface with irregularities including projections and recesses formed between the projections, each projection formed by an aggregate of some of the abrasive grains and larger in size than each of the abrasive grains, wherein each of the irregularities is greater than each of the abrasive grains in at least one of ten-point mean roughness Rz wherein the mean length Rsm of each of the irregularities is greater than the size of each of the abrasive grains, and ranges from 60 μm to 160 μm.