IN A WEB CONVEYOR (100), A BOUNDARY BETWEEN A BELT CONVEYER 110A AND A BELT CONVEYER 110B PROVIDED BETWEEN AN END PORTION (121D) IN UPSTREAM AND AN END PORTION IN DOWNSTREAM OF A HOLDING CONVEYER 120. IN OTHER WORDS, THE HOLDING CONVEYOR (120) THAT PRESSES ON THE TOP SURFACE OF THE WEB (200) IS DISPOSED AT THE BOUNDARY BETWEEN THE BELT CONVEYOR AND THE BELT CONVEYOR. FIG. 2