Elastic roller

An elastic roller, comprising:

• a roller shaft;
• and
• an elastic member surrounding around the roller shaft, the elastic roller configured to feed a belt-shaped member while the belt-shaped member contacts the elastic member,
• wherein
• the elastic member includes:
• an inner layer side elastic member surrounding around the roller shaft;
• and
• a coating layer surrounding around the inner layer side elastic member, the coating layer contacting the belt-shaped member when feeding the belt-shaped member,
• the inner layer side elastic member including a base layer and an intermediate layer located from the roller shaft in this order,
• the base layer and the intermediate layer having a rubber hardness of 30 to 80 degrees, the rubber hardness being measured by a durometer type A in accordance with the standard of JIS K 6253,
• the rubber hardness of the base layer being more than the rubber hardness of the intermediate layer,
• the intermediate layer having tearing strength of 25 N/mm or more, the tearing strength being measured using an unnicked angle-shaped test piece in accordance with JIS K 6252,
• the coating layer being made of silicone resin having hardness of 20 degrees or less, the hardness being measured using a spring-based Asker C type in accordance with SRIS 0101 standard,
• the coating layer having a thickness of 10 to 100 μm,
• the intermediate layer having a plurality of internal grooves along a circumferential direction of the intermediate layer,
• each of the internal grooves having a width of 25 to 1,300 μm,
• each of the internal grooves having a depth of 25 to 500 μm, and
• each of the internal grooves having a V-shaped cross section and having a groove angle of 40 to 160 degrees.