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US 2005/0030367 A1Published application
Scanning assemblies, printing devices, and related methods
AssigneeHewlett-Packard Development Company, L.P.
InventorB. Hirst
Life of this patent
Estimating the term…
Abstract
Scanning assemblies, printing devices, and related methods are described. In one embodiment, pole pieces are configured to be coupled with an input voltage source that can produce phase-shifted input voltages, the pole pieces defining at least first and second phases. A rotor is operably associated with the pole pieces for rotation. The pole pieces and the rotor are configured as an induction drive system in which a rotational force for rotating the rotor is produced through interaction of rotor-induced eddy currents from each of the first and second phases with respective magnetic fluxes of the other of the first and second phases.
Claims53
A scanning assembly comprising:
- pole pieces configured to be coupled with an input voltage source that can produce phase-shifted input voltages, the pole pieces defining at least first and second phases;
- a rotor operably associated with the pole pieces for rotation;
- and
- the pole pieces and the rotor being configured as an induction drive system in which a rotational force for rotating the rotor is produced through interaction of rotor-induced eddy currents from each of the first and second phases with respective magnetic fluxes of the other of the first and second phases.
1 more element
A scanning assembly comprising:
- pole pieces configured to be coupled with an input voltage source, the pole pieces define at least first and second phases;
- a shaft mounted in the laser scanning assembly for rotation;
- a mirror comprising material that provides a rotor, the mirror being mounted on the shaft;
- the pole pieces and the mirror being configured as an induction drive system in which a rotational force for rotating the mirror is produced through interaction of mirror-induced eddy currents from each of the first and second phases with respective magnetic fluxes of the other of the first and second phases.
1 more element
A scanning assembly comprising:
- pole pieces configured to be coupled with an input voltage source, the pole pieces defining at least first and second phases;
- a shaft mounted in the scanning assembly for rotation;
- a mirror mounted on the shaft;
- a rotor structure mounted on the shaft;
- and
- the pole pieces and the rotor structure being configured as an induction drive system in which a rotational force for rotating the rotor is produced through interaction of rotor-induced eddy currents from each of the first and second phases with respective magnetic fluxes of the other of the first and second phases.
3 more elements
A laser printer comprising:
- a voltage source configured to produce phase-shifted voltages;
- pole pieces operably coupled with the voltage source, the pole pieces defining at least first and second phases;
- a shaft mounted in the laser printer for rotation;
- a rotor mounted on the shaft;
- a laser source configured to produce a laser;
- a photoconductor proximate the laser source and configured to be scanned by the laser;
- and
- the voltage source, pole pieces and rotor being configured as an induction drive system in which a rotational force for rotating the rotor is produced through interaction of rotor-induced eddy currents from each of the first and second phases with respective magnetic fluxes of the other of the first and second phases.
5 more elements
An apparatus comprising:
- a mirror comprising facets, at least some of the facets being configured to reflect a laser beam towards a photoconductor;
- and
- the mirror being configured as a rotor for an induction drive system in a laser printing device in which a rotational force for rotating the mirror is produced through interaction of mirror-induced eddy currents from the induction drive system with respective magnetic fluxes provided by the induction drive system.
An apparatus comprising:
- means for applying individual phase-shifted voltages to individual respective phases of a multi-phase induction drive system of a laser printing device scanning assembly;
- means for inducing rotation of a mirror comprising part of the scanning assembly responsive to applying said voltages;
- means for directing a laser beam towards the rotating mirror;
- means for scanning a photoconductor with a laser beam reflected off of the mirror;
- and
- means for producing a printed image on a print medium responsive to scanning the photoconductor.
3 more elements
A method comprising:
- positioning pole pieces relative to an input voltage source configured to produce phase-shifted input voltages that are provided to the pole pieces, the pole pieces defining at least first and second phases;
- and
- mounting a rotor on a shaft for laser scanning rotation;
- and
- the voltage source, pole pieces and rotor being configured as an induction drive system in which a rotational force for rotating the rotor is produced through interaction of rotor-induced eddy currents from each of the first and second phases with respective magnetic fluxes of the other of the first and second phases.
2 more elements
A method comprising:
- applying phase-shifted voltages to respective phases of a multi-phase induction drive system of a laser printing device scanning assembly;
- responsive to said applying, inducing eddy currents in a rotor and magnetic fluxes that interact with the eddy currents sufficient to cause rotation of a mirror comprising part of the scanning assembly;
- directing a laser towards the rotating mirror;
- scanning a photoconductor with a laser reflected off of the mirror;
- and
- responsive to said scanning, producing a printed image on a print medium.
3 more elements
Dependencies are inferred from the claim text.