Fluid amplifier vacuum capstan control

Claim 1

A TRANSFER DEVICE FOR SELECTIVELY IMPARTING MOTION TO A WEB SITUATED IN A FLUID PRESSURE ENVIRONMENT, WHICH COMPRISES: (A) CAPSTAN MEMBER MEANS HAVING A MOVABLE SURFACE PORTION ADJACENT THE WEB AND ADAPTED TO SELECTIVELY GRASP OR RELEASE SAID WEB ACCORDING TO THE PRESENCE OF A RESPECTIVE FIRST OR SECOND POLARITY FLUID PRESSURE DIFFERENTIAL THEREACROSS; (B) FIRST MEANS LOCATED IN PROXIMITY TO BOTH SAID WEB AND SAID CAPSTAN MOVABLE SURFACE PORTION WHICH IS ADAPTED TO RECEIVE FLUID PRESSURE OF EITHER A FIRST OR SECOND MAGNITUDE AND COMMUNICATE SAME TO SAID WEB FOR RESPECTIVELY PROVIDING SAID FIRST AND SECOND POLARITY FLUID PRESSURE DIFFERENTIAL THEREACROSS; AND (C) A DIGITAL TYPE FLUID AMPLIFIER HAVING A POWER STREAM INPUT CHANNEL, A FIRST POWER STREAM OUTPUT CHANNEL WITH A FLUID ENTRAINMENT OFFSET REGION, A FIRST FLUID CHANNEL CONECTED BETWEEN SAID OFFSET REGION AND SAID FIRST MEANS, A SECOND POWER STREAM OUTPUT CHANNEL WITH A DYNAMIC FLOW OUTLET, A SECOND FLUID CHANNEL CONNECTED BETWEEN SAID FLOW OUTLET AND SAID FIRST MEANS, AND CONTROL SIGNAL INPUT MEANS FOR SELECTIVELY DIVERTING THE POWER STREAM TO EITHER SAID FIRST OR SAID SECOND POWER STREAM OUTPUT CHANNEL SUCH THAT A PARTICULAR ONE OF SAID FIRST AND SECOND MAGNITUDE FLUID PRESSURES APPEARS IN SAID FIRST FLUID CHANNEL WITH POWER STREAM FLOW IS THROUGH SAID FIRST POWER STREAM OUTPUT CHANNEL, AND THE OTHER OF SAID FIRST AND SECOND MAGNITUDE FLUID PRESSURES APPEARS IN SAID SECOND FLUID CHANNEL WHEN POWER STREAM FLOW IS THROUGH SAID SECOND POWER STREAM OUTPUT CHANNEL.