Patent ID: 9371188
Filing Date: 2016-06-21
CPC Classification: B41J,B65G,G03G

Claim Text:
1. A belt unit, comprising: an endless belt comprising a belt strip and a guided section, the guided section protruding from an inner circumferential surface of the belt strip at one of widthwise sides along a widthwise direction of the belt strip; a first roller and a second roller, around which the endless belt is strained; and a guiding member made of resin and arranged on one of axial-end sides of the first roller along an axial direction of the first roller coaxially with the first roller, the guiding member being rotatable and formed to have a groove, in which the guided section is set, wherein the groove comprises a first face and a second face, which face each other along a direction of a central axis, and a bottom surface, which extends in the direction of the central axis and forms an annular surface connecting one end of the first face closest to the central axis and one end of the second face closest to the central axis, wherein the first face of the groove is arranged in a position closer to the one of widthwise sides with respect to the second face along the direction of the central axis and is formed to have a first parting line extending in a direction to intersect with the central axis, the first face comprising a first part in a frontward range with respect to the first parting line along a rotating direction of the guiding member and a second part in a rearward range with respect to the first parting line along the rotating direction of the guiding member, and the first face being formed to have a first gap between the first part and the second part to form the first part in a position closer to the second face with respect to the second part, wherein the first face comprises a first unmolding line, which extends in a direction of a line tangent to an intersection between the bottom surface and the first parting line, wherein the second part is formed in a range extending from the first parting line rearward along the rotating direction of the guiding member to reach the first unmolding line, and wherein the second part comprises an inclined surface, which extends in a direction of the first unmolding line, one of edges of the inclined surface being coincident with the first unmolding line.