Compliant pressure roller with uniform nip pressure
AssigneeRohm and Haas Denmark Finance A/S
InventorsRichard D. Bomba, Nelson A. Blish
Life of this patent
Estimating the term…
Abstract
A compliant pressure roller (10) for creating uniform pressure at a nip (42) has a stationary inner core (12). A plurality of shoes (14) is pivotally mounted to the stationary inner core. Non-magnetic dividers (16) create a plurality of annular chambers (18) and one shoe occupies one of the chambers. A magneto-rheological fluid fills each of the chambers and a plurality of magnetic field generators (13) changes a magnetic field in each of the chambers. A thin, rotatable shell (24) surrounds the plurality of chambers, shoes, and stationary inner core.
Claims23
A compliant pressure roller for creating uniform pressure at a nip comprising:
- a stationary inner core;
- a plurality of shoes pivotally mounted to said stationary inner core;
- non-magnetic dividers creating a plurality of annular chambers wherein each of said shoes occupies one of said chambers;
- a magneto-rheological fluid filling each of said chambers;
- a plurality of magnetic field generators for changing a magnetic field in each of said chambers;
- and
- a thin, rotatable shell surrounding said plurality of chambers, shoes, and stationary inner core.
A compliant pressure roller for creating uniform pressure at a nip comprising:
- a stationary inner core;
- a plurality of shoes pivotally mounted to said stationary inner core;
- non-magnetic dividers creating a plurality of annular chambers wherein each of said shoes occupies one of said chambers;
- a magneto-rheological fluid filling each of said chambers;
- a plurality of magnetic field generators for changing a magnetic field in each of said chambers;
- a thin, metal, rotatable shell surrounding said plurality of chambers, shoes, and stationary inner core;
- wherein each of said magnetic field generators are individually adjustable to compensate for deformation in said rotatable shell;
- and
- wherein a hydrodynamic force on said magneto-rheological fluid created by rotation of said shell compensates for deformation in said shell.
A compliant pressure roller for creating uniform pressure comprising:
- a stationary inner core;
- a plurality of shoes pivotally mounted to said stationary inner core;
- non-magnetic dividers creating a plurality of annular chambers wherein each of said shoes occupies one of said chambers;
- a magneto-rheological fluid filling each of said chambers;
- a plurality of magnetic field generators for changing a magnetic field in each of said chambers;
- a thin, rotatable shell surrounding said plurality of chambers, shoes, and stationary inner core;
- at least one detector for detecting deformation in said thin, rotatable shell;
- a microprocessor for processing information on shell deformation;
- and
- adjusting at least one of said magnetic field generators to compensate for shell deformation.
Dependencies are inferred from the claim text.