Patent ID: 7434300

Claim:
A process for producing a clutch friction plate by bonding a plurality of friction material segments to an annular flat face of an annular core plate so that oil channels are formed between the friction material segments, the process comprising: a step of forming a plurality of strip-shaped friction materials by making one or more continuous slits in a band-shaped friction material along its longitudinal direction while feeding the band-shaped friction material in a direction along one diameter of the annular core plate; a step of aligning and holding portions, corresponding to the friction material segments, of leading edge parts of the plurality of strip-shaped friction materials in positions above the annular core plate while positioning the portions in the peripheral direction and in the direction along said one diameter of the annular core plate and enlarging the distance between said portions to an amount corresponding to the oil channel; a step of forming the plurality of friction material segments by cutting off the leading edge parts of the plurality of strip-shaped friction materials positioned above the annular core plate along a cutting-off line that includes at least an arc line that follows the outer periphery of the annular core plate; and a step of pressing and bonding the plurality of friction material segments onto the annular flat face coated with an adhesive.