Nip pressure measurement

Claim 2

The process for measuring the pressure exerted at the nip of a roll, which process comprises passing a restricted flow of pressurized fluid through a thin-walled non-rigid tube extending into the nip, and measuring the pressure in the tube when it is balanced by the nip pressure.

Claim 3

The process of claim 1 in which the flow of pressurized fluid is restricted as to rate of flow so as not to exceed the rate of flow permitted by the nip.

Claim 4

The process of claim 2 in which the flow of pressurized fluid is restricted by an orifice.

Claim 5

The process of claim 1 in which the flow of pressurized fluid is restricted as to quantity flowed so as not to subject the tube to damaging pressure.

Claim 6

The process of claim 3 in which the fluid is supplied to the tube from a single-shot dispenser.

Claim 7

The combination of claim 1 in which the tube has a wall thickness at least half the nip clearance.

Claim 8

The combination of claim 1 in which the fluid is a refrigerant gas.

Claim 9

The combination of claim 1 in which the nip is elastomeric.

Claim 10

The combination of claim 1 in which the wall thickness of the tube is less than half the nip clearance and the tube is plugged at the nip with a resiliently compressible fluid-transmitting porous plug.

Claim 11

The combination of claim 1 in which the wall thickness of the tube is less than half the nip clearance and a filler is inserted into the nip with the tube to take up residual nip clearance.

Claim 12

A pressure measuring device having means for supplying a restricted stream of fluid under pressure, a conduit connected for receiving the stream, said conduit terminating with a thin-walled non-rigid tube, and a pressure gauge connected to the conduit at a location between the supply means and the non-rigid tube, the thin-walled non-rigid tube being removably connected to the balance of the conduit by a pressure-withstanding connection that includes an O-ring groove encircling a portion of the conduit, an O-ring in the groove and projecting therefrom, the tube being fitted over the O-ring, and a locking ring encircling the tube over the O-ring and having an internal groove that receives the tube-covered outer portion of the O-ring and seals the connection.

Claim 13

A pressure measuring device having means for supplying a restricted stream of fluid under pressure, a conduit connected for receiving the stream, said conduit terminating with a thin-walled non-rigid tube, and a pressure gauge connected to the conduit at a location between the supply means and the non-rigid tube, the thin-walled non-rigid tube being removably connected to the balance of the conduit by a pressure-withstanding connection that includes an O-ring groove encircling a portion of the conduit, an O-ring in the groove and projecting therefrom, the tube being fitted over the O-ring, and a locking ring encircling the tube over the O-ring and having an internal groove that receives the tube-covered outer portion of the O-ring and seals the connection.

Claim 14

The combination of claim 11 in which the locking ring is of bulbous shape to keep it from being drawn into the nip of rolls.

Claim 15

The combination of claim 12 in which the surface of the locking ring is resinous.

Claim 16

The combination of claim 13 in which the resinous surface is at least as low-friction as polyethylene.

Claim 17

A pressure measuring device having means for supplying a restricted stream of fluid under pressure, a conduit connected for receiving the stream, said conduit terminating with a thin-walled non-rigid tube plugged with a resiliently compressible fluid-transmitting porous plug, and a pressure gauge connected to the conduit at a location between the supply means and the non-rigid tube.

Claim 18

A pressure measuring device having means for supplying a restricted stream of fluid under pressure, a conduit connected for receiving the stream, said conduit terminating with a thin-walled non-rigid tube plugged with a resiliently compressible fluid-transmitting porous plug, and a pressure gauge connected to the conduit at a location between the supply means and the non-rigid tube.

Claim 19

A pressure measuring device having single-shot dispenser means for supplying a restricted stream of fluid under pressure, a conduit connected for receiving the stream, said conduit terminating with a thin-walled non-rigid tube, and a pressure gauge connected to the conduit at a location between the dispenser means and the non-rigid tube.

Claim 20

A pressure measuring device having single-shot dispenser means for supplying a restricted stream of fluid under pressure, a conduit connected for receiving the stream, said conduit terminating with a thin-walled non-rigid tube, and a pressure gauge connected to the conduit at a location between the dispenser means and the non-rigid tube.

Claim 23

The combination of claim 17 in which the conduit includes a readily bendable bend-retaining section that enables the tube to be inserted into a nip by bending the bendablE section so that the apparatus can be held in a location convenient to the nip.

Claim 24

The combination of claim 17 in which the apparatus including its source of fluid is entirely portable and hand-held.

Claim 25

The combination of claim 17 in which the apparatus includes as a source of fluid under pressure, a container of pressurized gas.

Claim 26

The combination of claim 17 in which the tube is a limp one.

Claim 27

The combination of claim 17 in which the restricting means an orifice.