PROBLEM TO BE SOLVED: To retain proper forming properties of a roll bale, and to restrain deformation of a shoulder section of the roll bale.SOLUTION: A transportation projection 53, provided protrusively on a transport face 54 of a caterpillar transport conveyer 5 for transporting a material to be formed from a lower direction to an upper direction and feeding the material to a forming chamber 2, has an inclined surface 55 which spreads on the upstream side of the transport direction, by using the center part of the transport face 54 as a top.COPYRIGHT: (C)2009,JPO&INPIT【課題】ロールベールの良好な成形性の保持、及びロールベールの肩部の崩れの抑制。【解決手段】成形室2に対し、被成形材料を下方から上方へ運搬して供給する無限軌道状の運搬コンベア5の運搬面54に突設された運搬突起53が、前記運搬面54の中央部を頂点として、運搬方向上流側に拡がるような傾斜面55を有している。【選択図】図2