| Patent application number | Description | Published |
|---|
| 20090255922 | SYSTEM AND METHOD FOR REDUCING CURRENT EXITING A ROLL THROUGH ITS BEARINGS USING BALANCED MAGNETIC FLUX VECTORS IN INDUCTION HEATING APPLICATIONS - A system includes a roll formed from a conductive material, where the roll is configured to rotate about an axis. The system also includes at least one induction heating workcoil configured to generate multiple magnetic fluxes within the roll. Each induction heating workcoil includes at least two separately wound coils. The multiple magnetic fluxes when spatially summed have a substantially null magnetic flux vector. An induction heating workcoil could represent a balanced induction heating workcoil that is configured to individually generate multiple magnetic fluxes that when spatially summed have the substantially null magnetic flux vector. Multiple induction heating workcoils could also represent unbalanced induction heating workcoils configured to collectively generate multiple magnetic fluxes that when spatially summed have the substantially null magnetic flux vector. | 10-15-2009 |
| 20090255925 | SYSTEM, APPARATUS, AND METHOD FOR INDUCTION HEATING USING FLUX-BALANCED INDUCTION HEATING WORKCOIL - An apparatus includes one or more magnetic cores collectively having an inner leg located between two outer legs. The legs are coupled to one or more connecting portions. The apparatus also includes one or more conductive coils wound around the inner leg. The one or more magnetic cores and the one or more conductive coils are configured to generate substantially balanced magnetic fluxes when the conductive coil is energized. Also, the one or more magnetic cores and the one or more conductive coils are configured so that heat created by currents induced in the roll by the magnetic fluxes produces a steady state thermal profile on a surface of the roll. The steady state thermal profile has one peak that falls within a control zone associated with the roll. The one or more magnetic cores could include a single magnetic core or multiple magnetic cores. | 10-15-2009 |
| 20090258771 | SYSTEM AND METHOD FOR REDUCING CURRENT EXITING A ROLL THROUGH ITS BEARINGS - A system includes a roll formed from a conductive material, where the roll is configured to rotate about an axis. The system also includes an induction heating workcoil configured to generate currents within the roll. The induction heating workcoil is unbalanced and is oriented so that minimal currents flow in a direction substantially parallel to the axis of the roll. The induction heating workcoil could include one or more substantially U-shaped or C-shaped cores and at least one coil each wound around at least one of the one or more cores. Also, the roll may further include a shaft and bearings, and the induction heating workcoil can be positioned so that the currents do not flow substantially through the bearings. | 10-15-2009 |
| 20090260771 | Sheet Stabilizer With Dual Inline Machine Direction Air Clamps and Backsteps - An air stabilization system employing two substantially parallel, codirectional Coanda nozzles, that are positioned adjacent a flexible moving web, with each nozzle exhausting gas at the same downstream machine direction, subjects the moving web to shear forces effective to stabilize the web. Each nozzle includes an elongated slot that is substantially perpendicular to the path of the moving web and a backstep located downstream of the direction of airflow extending from the Coanda slot. The two Coanda nozzles serve as separate points along the machine direction for controlling the height of the moving web. By modulating the velocities or other parameters of gases exiting the Coanda nozzles, the shape of the moving web between the nozzles can be manipulated to present a planar contour for measurements. The air stabilization system can be incorporated into a scanner head to measure the caliper of paper, plastic, and other flexible web products. | 10-22-2009 |
| 20090260772 | Sheet Stabilization With Dual Opposing Cross Direction Air Clamps - An air stabilization system employing two parallel, opposite facing Coanda nozzles, that are positioned adjacent a flexible moving web, with each nozzle exhausting gas at opposite directions, subjects the moving web to opposing forces effective to stabilize the web. Each nozzle includes an elongated slot that is parallel to the path of the moving web. The two Coanda nozzles serve as separate points along the machine direction for controlling the height of the moving web. By modulating the flow, pressure and other parameters of gases exiting the Coanda nozzles, the shape of the moving web between the nozzles can be manipulated to present a planar contour for measurements. The air stabilization system can be incorporated into a scanner head to measure the caliper of paper, plastic, and other flexible web products. | 10-22-2009 |
| 20090294084 | Local Tension Generating Air Stabilization System for Web Products - An air stabilization system employing two parallel, opposite-facing Coanda nozzles, with each nozzle exhausting gas at opposite directions, subjects a moving flexible web to opposing forces effective to create local tension within the web. Each nozzle includes an elongated slot that is perpendicular to the path of the moving web. The nozzles serve as separate points along the machine direction for controlling the height of the web. The operative surface with the nozzles can exhibit a flush surface. The nozzles can be formed on elevated structures on the operative surface. The operative surface can be covered with a transparent substrate to minimize shape distortions on the moving web and to prevent debris from collecting around the sensor. By modulating the velocities of gases exiting the nozzles, the shape of the web can be manipulated to present a planar contour. The air stabilization system can be incorporated into a caliper scanner. | 12-03-2009 |
| 20100200570 | SYSTEM AND METHOD FOR REDUCING CROSSTALK BETWEEN WORKCOILS IN INDUCTION HEATING APPLICATIONS - A system includes a roll formed from a conductive material, where the roll is configured to rotate about an axis and has a direction of rotation. The system also includes multiple induction heating workcoils each configured to induce one or more magnetic fluxes within the roll to generate one or more electrical currents within the roll. Each induction heating workcoil can be oriented so that a mean magnetic flux induced by the workcoil is oblique to the roll's direction of rotation. Each of the induction heating workcoils could represent an unbalanced induction heating workcoil, or each of the induction heating workcoils could include a core having a shape that is not substantially dependent on the roll's diameter. | 08-12-2010 |
