AN APPARATUS FOR CUTTING A MOVING PAPER SHEET BY MEANS OF A WATER JET

摘要

Apparatus (10) for controllably advancing a high pressure water jet (18) across a moving paper sheet to cut a tail therefrom. A hose (22) supplies pressurized water to the jet (18). A drive mechanism (14, 16, 92) advances the jet (18) and the hose (22) at the same rate across the paper sheet. The hose (22) is supported on a rotatable reel (26) during the advancing operation, in a manner which avoids the application of tension or compression forces to the hose (22) and prevents repeated flexing of the hose end at its connection to the high pressure water supply. A drive chain (16) is coupled between the jet (18) and the reel (26), whereby movement of the jet (18) causes corresponding movement of the chain (16), which causes corresponding movement of the reel (26), to uncoil or recoil the hose (22) at precisely the same rate as the jet (18) is advanced or retracted.