초록 ▼

A roller comprising a roller surface layer whose diameter progressively diminishes from its central portion toward the opposite ends, and an arched roller shaft for rotatably supporting the roller surface layer, thereby ensuring that the sheeting is subjected to stretching or shrinking without the p

A roller comprising a roller surface layer whose diameter progressively diminishes from its central portion toward the opposite ends, and an arched roller shaft for rotatably supporting the roller surface layer, thereby ensuring that the sheeting is subjected to stretching or shrinking without the possibility of permanent set therein.

대표청구항 ▼

A roller for feeding articles comprising an arched support shaft disposed in a fixed position under a no-load condition, and a roller surface layer mounted to rotate around said arched support shaft without the rotation of said shaft, said roller surface layer having a circumference which decreases

A roller for feeding articles comprising an arched support shaft disposed in a fixed position under a no-load condition, and a roller surface layer mounted to rotate around said arched support shaft without the rotation of said shaft, said roller surface layer having a circumference which decreases progressively from its central portion to the ends thereof with said roller surface layer deforming with cyclical expansion and contraction in the direction of its width while being rotated about said arched support shaft such that at least one axial straight line is defined along an external periphery of said roller surface layer.