A glossing device for processing a toner image on a recording medium, the device comprising: a first roller; a second roller parallel to the first roller; an endless rotary belt looped for rotation around the first and second rollers (36, 37) in a longitudinal, conveyance direction of the belt; a third roller opposite the first roller via the belt; a heater adjacent to the belt to heat the belt; the first and third rollers (36, 40) pressing against each other via the belt to form a nip (Ng) therebetween through which the recording medium is conveyed to process a toner image under heat and pressure, the recording medium after passage through the nip(Ng) remaining in contact with the belt as the belt moves from the first roller toward the second roller, and separating from the belt as the belt passes around the second roller; and a belt cooler inside the loop of the belt downstream from the first roller and upstream from the second roller for cooling the belt, characterized in that the belt cooler including at least two mutually spaced cooling elements (42U, 42D) wherein each of the cooling elements (42U, 42D) comprises a separate independent cooling jacket, wherein the cooling elements (42U, 42D) together form a gapped contact surface for establishing thermal contact with the belt, wherein the cooling elements (42U, 42D) extend parallel to each other in order to define an elongated gap therebetween extending in a traverse direction of the belt perpendicular to the conveyance direction of the belt, wherein the glossing device further comprises a suction mechanism connected to the belt cooler to create suction within the gap to attract the belt to the gapped contact surface of the belt cooler. a first roller; a second roller parallel to the first roller; an endless rotary belt looped for rotation around the first and second rollers (36, 37) in a longitudinal, conveyance direction of the belt; a third roller opposite the first roller via the belt; a heater adjacent to the belt to heat the belt; the first and third rollers (36, 40) pressing against each other via the belt to form a nip (Ng) therebetween through which the recording medium is conveyed to process a toner image under heat and pressure, the recording medium after passage through the nip(Ng) remaining in contact with the belt as the belt moves from the first roller toward the second roller, and separating from the belt as the belt passes around the second roller; and a belt cooler inside the loop of the belt downstream from the first roller and upstream from the second roller for cooling the belt, characterized in that the belt cooler including at least two mutually spaced cooling elements (42U, 42D) wherein each of the cooling elements (42U, 42D) comprises a separate independent cooling jacket, wherein the cooling elements (42U, 42D) together form a gapped contact surface for establishing thermal contact with the belt, wherein the cooling elements (42U, 42D) extend parallel to each other in order to define an elongated gap therebetween extending in a traverse direction of the belt perpendicular to the conveyance direction of the belt, wherein the glossing device further comprises a suction mechanism connected to the belt cooler to create suction within the gap to attract the belt to the gapped contact surface of the belt cooler.