Abstract: In order to securely prevent or detect overlap feeding of sheet materials, there is provided a sheet material feeding mechanism which deforms the sheet materials on a feeding line so as to form a gap between the overlapping sheet materials which firmly cling to each other. For preventing the overlap feeding of the sheets, the drive relationship between a feeding roller and a pair of a parting roller and a retarding roller located on the downstream side from the feeding roller is optimized to form the gap between the sheet materials. Further, for detecting the overlap feeding of the sheets, bending correction ribs are provided on guide plates formed on the upper and lower sides of the feeding line of the sheet materials so as to deform the sheet materials fed in the overlapping condition, thereby the gap is formed between the overlapping sheets.

Abstract: In order to securely prevent or detect overlap feeding of sheet materials, there is provided a sheet material feeding mechanism which deforms the sheet materials on a feeding line so as to form a gap between the overlapping sheet materials which firmly cling to each other. For preventing the overlap feeding of the sheets, the drive relationship between a feeding roller and a pair of a parting roller and a retarding roller located on the downstream side from the feeding roller is optimized to form the gap between the sheet materials. Further, for detecting the overlap feeding of the sheets, bending correction ribs are provided on guide plates formed on the upper and lower sides of the feeding line of the sheet materials so as to deform the sheet materials fed in the overlapping condition, thereby the gap is formed between the overlapping sheets.