| 摘要 |
<p>Apparatus for use in folding web material includes a plow folder (60) supported intermediate transverse entrance and exit rollers and cooperative therewith to effect longitudinal folding of the web as it moves longitudinally through the apparatus. The apparatus being intended to produce more uniform and smooth folding to reduce such problems as web marking or wrinkling. In a preferred embodiment, the plow folder includes at least one rotatable cylindrical web engaging roller (72) and a fold forming member (74) coaxial with the web engaging roller. Air orifices are formed in the outer peripheral surface of the fold forming member to facilitate air lubrication between the fold forming member and the moving web.</p> |
