1. A wireless mobile communication device comprising:
a Wi-Fi data communication system configured to wirelessly connect to a Wi-Fi access point and to wirelessly communicate data between the wireless mobile communication device and the Wi-Fi access point;
an operational condition detection system configured to detect a turn-on operational condition of the wireless mobile communication device, other than actuation of a user-operated control; and
a Wi-Fi activation system configured to autonomously turn power on to the Wi-Fi data communication system upon detection of the turn-on operational condition of the wireless mobile communication device by the operational condition detection system, other than actuation of a user-operated control.
2. The wireless mobile communication device of claim 1 wherein:
the operational condition detection system includes a motion sensor configured to sense motion of the wireless mobile communication device; and
the turn on operational condition is when the motion sensor senses that the wireless mobile communication device has been substantially motionless.
3. The wireless mobile communication device of claim 2 wherein substantially motionless is when the wireless mobile communication device has not moved at an average velocity in excess of a threshold during a pre-determined period.
4. The wireless mobile communication device of claim 1 wherein the Wi-Fi activation system is configured to autonomously turn power off to the Wi-Fi data communication system, after autonomously turning power on to the Wi-Fi data communication system, upon detection of a turn-off operational condition of the wireless mobile communication device by the operational condition detection system, other than actuation of a user-operated control.
5. The wireless mobile communication device of claim 4 wherein:
the operational condition detection system includes a Wi-Fi connection detector configured to detect when a connection to a Wi-Fi access point been established; and
the turn-off operational condition is when a Wi-Fi connection to a Wi-Fi access point cannot be established.
6. The wireless mobile communication device of claim 4 wherein:
the operational condition detection system includes a Wi-Fi connection detector configured to detect when a connection to a Wi-Fi access point has been broken; and
the turn-off operational condition is when the Wi-Fi connection detector detects that a Wi-Fi connection to a Wi-Fi access point has been broken.
7. The wireless mobile communication device of claim 4 wherein the Wi-Fi activation system includes a power-on delay timer configured to prevent the Wi-Fi activation system from autonomously turning power on to the Wi-Fi data communication system, notwithstanding detection of the turn-on operational condition by the operational condition detection system, for a pre-determined waiting period after the Wi-Fi activation system has autonomously turned power off to the Wi-Fi data communication system.
8. The wireless mobile communication device of claim 7 wherein:
the operational condition detection system includes a motion sensor configured to sense motion of the wireless mobile communication device; and
the power-on delay timer is configured to prematurely terminate the pre-determined waiting period when the motion sensor senses that the wireless mobile communication device has moved substantially after initiation of the pre-determined waiting period.
9. The wireless mobile communication device of claim 1:
further comprising a data storage system configured to store a user-setting in the wireless mobile communication device indicating that the wireless mobile communication device should not transmit; and
wherein the Wi-Fi activation system is configured not to autonomously turn power on to the Wi-Fi data communication system, notwithstanding detection of the turn-on operational condition by the operational condition detection system, if the data storage system is storing a user-setting indicating that the wireless mobile communication device should not transmit.
10. The wireless mobile communication device of claim 1 wherein the Wi-Fi data communication system is configured to implement one or more user-provided policies governing automatic connection of the Wi-Fi data communication system to specific Wi-Fi access points.
11. Non-transitory, tangible, computer-readable storage media containing computer programming instructions which, when executed by a computer processing system within a wireless mobile communication device having:
a Wi-Fi data communication system configured to wirelessly connect to a Wi-Fi access point and to wirelessly communicate data between the wireless mobile communication device and the Wi-Fi access point; and
an operational condition detection system configured to detect a turn-on operational condition of the wireless mobile communication device, other than actuation of a user-operated control;
cause the computer processing system to function as a Wi-Fi activation system which autonomously turns power on to the Wi-Fi data communication system upon detection of the turn-on operational condition of the wireless mobile communication device by the operational condition detection system, other than actuation of a user-operated control.
12. The non-transitory, tangible, computer-readable storage media of claim 11 wherein:
the operational condition detection system includes a motion sensor configured to sense motion of the wireless mobile communication device; and
the turn-on operational condition is when the motion sensor senses that the wireless mobile communication device has been substantially motionless.
13. The non-transitory, tangible, computer-readable storage media of claim 12 wherein substantially motionless is when the wireless mobile communication device has not moved at an average velocity in excess of a threshold during a pre-determined period.
14. The non-transitory, tangible, computer-readable storage media of claim 11 wherein the computer programming instructions, when executed by the computer processing system, cause the Wi-Fi activation system to autonomously turn power off to the Wi-Fi data communication system, after autonomously turning power on to the Wi-Fi data communication system, upon detection of a turn-off operational condition of the wireless mobile communication device by the operational condition detection system, other than actuation of a user-operated control.
15. The non-transitory, tangible, computer-readable storage media of claim 14 wherein:
the operational condition detection system includes a Wi-Fi connection detector configured to detect when a connection to a Wi-Fi access point has been established; and
the turn-off operational condition is when the Wi-Fi connection detector detects that a Wi-Fi connection to a Wi-Fi access point cannot be established.
16. The non-transitory, tangible, computer-readable storage media of claim 14 wherein:
the operational condition detection system includes a Wi-Fi connection detector configured to detect when a connection to a Wi-Fi access point has been broken; and
the turn-off operational condition is when the Wi-Fi connection detector detects that a Wi-Fi connection to a Wi-Fi access point has been broken.
17. The non-transitory, tangible, computer-readable storage media of claim 14 wherein the computer programming instructions which, when executed by a computer processing system, cause the Wi-Fi activation system to include a power-on delay timer which prevents the Wi-Fi activation system from autonomously turning power on to the Wi-Fi data communication system, notwithstanding detection of the turn-on operational condition by the operational condition detection system, for a pre-determined waiting period after the Wi-Fi activation system has autonomously turned power off to the Wi-Fi data communication system.
18. The non-transitory, tangible, computer-readable storage media of claim 17 wherein:
the operational condition detection system includes a motion sensor configured to sense motion of the wireless mobile communication device; and
the computer programming instructions which, when executed by a computer processing system, cause the power-on-delay timer to prematurely terminate the pre-determined waiting period when the motion sensor senses that the wireless mobile communication device has moved substantially after initiation of the pre-determined waiting period.
19. The non-transitory, tangible, computer-readable storage media of claim 11 wherein the computer programming instructions, when executed by the computer processing system, cause the Wi-Fi activation system not to autonomously turn power on to the Wi-Fi data communication system, notwithstanding detection of the turn-on operational condition by the operational condition detection system, if a user-setting in the wireless mobile communication device indicates that the wireless mobile communication device should not transmit.
20. The non-transitory, tangible, computer-readable storage media of claim 11 wherein the computer programming instructions, when executed by the computer processing system, cause the Wi-Fi data communication system to implement one or more user-provided policies governing automatic connection of the Wi-Fi data communication system to specific Wi-Fi access points.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A developer carriers, comprising:
a developing sleeve for carrying and transporting a developer; and
a magnetic roll disposed within said developing sleeve having a plurality of magnetic poles,
wherein a width of a development pole forming a magnet brush to raise the developer in a developing region facing a latent image carrier is narrowed, a rising region of said developer in said developing region is narrowed to realize a narrow development nip, and a flux density attenuation ratio of said development pole is 40% or more, and
a half-value width of a flux density of said development pole is 22\xb0 or less, and a flux density variation rate in a circumferential direction is 4.0 mTDeg or more in a part where the flux density in at least half of a downstream side of a developer carrying direction from a peak magnetic force position of said development pole is 90% or less.
2. The developer carrier as claimed in claim 1, wherein said magnet roll is roughly of a cylindrical shape comprising a plastic magnet formed by mixing magnetic powder with a high polymer material or rubber magnet and the plurality of magnetic poles, including said development pole, is magnetized thereto.
3. The developer carrier as claimed in claim 2, wherein the magnetic powder comprises a ferrite-based magnetic material, and said high polymer material comprises a high polymer compound, the high polymer compound being selected from a group consisting of a polyamide-based material, an ethylenic compound, a chlorine-based material, and a rubber material.
4. The developer carrier as claimed in claim 1, wherein said magnet roll is roughly of a cylindrical shape comprising a plastic magnet formed by mixing magnetic powder with a high polymer material or rubber magnet except for the development pole, a portion of the plurality of magnetic poles are magnetized except for said development pole, and said development pole is provided with a magnet block comprising a material having a larger maximum energy product (B Hmax) than the cylindrical magnet roll.
5. The developer carrier as claimed in claim 4, wherein said magnet block is buried in a groove part formed in the roughly cylindrical magnet roll and fixed thereto.
6. The developer carrier as claimed in claim 5, wherein said magnet block is formed smaller than the groove part of the roughly cylindrical magnet roll and is buried on a downstream side of the developer transporting direction in said groove.
7. The developer carrier as claimed in claim 4, wherein said magnet block comprises a material having a maximum energy product (B Hmax) of 10 MGOe or more.
8. The developer carrier as claimed in claim 4,
wherein the magnetic powder comprises a ferrite-based magnetic material, said high polymer material comprises a high polymer compound being selected from a group consisting of a polyamide-based material, an ethylenic compound, a chlorine-based material, and a rubber material, and the magnet block comprises a plastic magnet formed by mixing a rare earth-based magnet or rare earth-based magnet powder with a second high polymer material similar to the high polymer material or a rubber magnet.
9. In a developing system for visualizing a latent image on a latent image carrier by forming a magnet brush with a developer raised on a developer carrier and by rubbing said latent image carrier with said magnet brush, said developer carrier comprising: a developing sleeve for carrying and transporting the developer; and
a magnetic roll disposed within said developing sleeve having a plurality of magnetic poles,
wherein a width of a development pole forming the magnet brush to raise the developer in a developing region facing the latent image carrier is narrowed, a rising region of said developer in said developing region is narrowed to realize a narrow development nip, and a flux density attenuation ratio of said development pole is 40% or more, and
a half-value width of a flux density of said development pole is 22\xb0 or less, and a flux density variation rate in a circumferencial direction is 4.0 mTDeg or more in a part where the flux density in at least half of a downstream side of a developer carrying direction from a peak magnetic force position of said development pole is 90% or less.
10. The developing system as claimed in claim 9, wherein the peak magnetic force position of the development pole of said developer carrier is positioned at an upstream side in the developer transporting direction from a position where the developer approaches closest to the latent image carrier to be developed.
11. The developing system as claimed in 9, wherein a two-component developer comprising a magnetic carrier and a spherical toner is used as the developer.
12. The developing system as claimed in claim 11, wherein a particle size of said spherical toner is 5 \u03bcm or less.
13. In a developing device equipped with a developer carrier for carrying and transporting a developer having a magnet brush with the developer raised on said developer carrier for visualizing a latent image on a latent image carrier by rubbing said latent image carrier with said magnet brush, said developer carrier comprising:
a developing sleeve for carrying and transporting the developer; and
a magnetic roll disposed within said developing sleeve having a plurality of magnetic poles,
wherein a width of a development pole forming the magnet brush to raise the developer in a developing region facing the latent image carrier is narrowed, a rising region of said developer in said developing region is narrowed to realize a narrow development nip, and a flux density attenuation ratio of said development pole is 40% or more, and
a half-value width of a flux density of said development pole is 22\xb0 or less, and a flux density variation rate in circumferential direction is 4.0 mTDeg or more in a part where the flux density in at least half of a downstream side of a developer carrying direction from a peak magnetic force position of said development pole is 90% or less.
14. The developing device as claimed in claim 13, wherein the peak magnetic force position of the development pole of said developer carrier is positioned at a upstream side in the developer transporting direction from a position where the developer approaches closest to the latent image carrier to be developed.
15. The developing device as claimed in claim 13, wherein a two-component developer comprising a magnetic carrier and a spherical toner is used as the developer.
16. The developing device as claimed in claim 15, wherein a particle size of said spherical toner is 5 \u03bcm or less.
17. In a process cartridge used for an image forming part of an image forming apparatus, the process cartridge detachably installed to an apparatus main body and integrally equipped with at least a latent image carrier and a developing device therein, wherein said developing device is equipped with a developer carrier for carrying and transporting a developer having a magnet brush with the developer raised on said developer carrier for visualizing a latent image on a latent image carrier by rubbing said latent image carrier with said magnet brush, said developer carrier comprising:
a developing sleeve for carrying and transporting the developer; and
a magnetic roll disposed within said developing sleeve having a plurality of magnetic poles,
wherein a width of a development pole forming the magnet brush to raise the developer in a developing region facing the latent image carrier is narrowed, a rising region of said developer in said developing region is narrowed to realize a narrow development nip, and a flux density attenuation ratio of said development pole is 40% or more, and
a half-value width of a flux density of said development pole is 22\xb0 or less, and a flux density variation rate in a circumferential direction is 4.0 mTDeg or more in a part where the flux density in at least half of a downstream side of a developer carrying direction from a peak magnetic force position of said development pole is 90% or less.
18. In a process cartridge used for an image forming part of a image forming apparatus, the process cartridge detachably installed to an apparatus main body and integrally equipped with at least a latent image carrier, a charging device for charging said latent image carrier, a developing device and a cleaning device for cleaning said latent image carrier in the cartridge, wherein said developing device is equipped with a developer carrier for carrying and transporting a developer having a magnet brush with a developer raised on said developer carrier for visualizing a latent image on a latent image carrier by rubbing said latent image carrier with said magnet brush, said developer carrier comprising:
a developing sleeve for carrying and transporting the developer; and
a magnetic roll disposed within said developing sleeve having a plurality of magnetic poles,
wherein a width of the development pole forming the magnet brush to raise the developer in a developing region facing the latent image carrier is narrowed, a rising region of said developer in said developing region is narrowed to realize a narrow development nip, and a flux density attenuation ratio of said development pole is 40% or more, and
a half-value width of a flux density of said development pole is 22\xb0 or less, and a flux density variation rate in a circumferential direction is 4.0 mTDeg or more in a part where the flux density in at least a half of a downstream side of a developer carrying direction from a peak magnetic force position of said development pole is 90% or less.
19. In an image forming apparatus forming a latent image on a latent image carrier, visualizing the latent image on said latent image carrier with a developer of a developing device, then transferring an image corresponding to the latent image to a recording material, and fixing to form the image, wherein said developing device is equipped with a developer carrier for carrying and transporting the developer having a magnet brush with the developer raised on said developer carrier for visualizing the latent image on the latent image carrier by rubbing said latent image carrier with said magnet brush, said developer carrier comprising:
a developing sleeve for carrying and transporting the developer; and
a magnetic roll disposed within said developing sleeve having a plurality of magnetic poles,
wherein a width of a pole development pole forming the magnet brush to raise the developer in a developing region facing the latent image carrier is narrowed, a rising region of said developer in said developing region is narrowed to realize a narrow development nip, and a flux density attenuation ratio of said development pole is 40% or more, and
a half-value width of a flux density of said development pole is 22\xb0 or less, and a flux density variation rate in a circumferential direction is 4.0 mTDeg or more in a part where the flux density in at least half of a downstream side of a developer carrying direction from a peak magnetic force position of said development pole is 90% or less.
20. In an image forming apparatus forming a latent image on a latent image carrier, visualizing the latent image on said latent image carrier by developing with a developer of a developing device, then transferring an image corresponding to the latent image to a recording material, and fixing to form the image, wherein a process cartridge is provided, and said process cartridge is used for an image forming part of the image forming apparatus, the process cartridge detachably installed to an apparatus main body and integrally equipped with at least the latent image carrier and the developing device in the cartridge, wherein said developing device is equipped with a developer carrier for carrying and transporting the developer having a magnet brush with the developer raised on said developer carrier for visualizing a latent image on a latent image carrier by rubbing said latent image carrier with said magnet brush, said developer carrier comprising:
a developing sleeve for carrying and transporting the developer; and
a magnetic roll disposed within said developing sleeve having a plurality of magnetic poles,
wherein a width of a development pole forming the magnet brush to raise the developer in a developing region facing the latent image carrier is narrowed, a rising region of said developer in said developing region is narrowed to realize a narrow development nip, and a flux density attenuation ratio of said development pole is 40% or more, a half-value width of a flux density of said development pole is 22\xb0 or less, and a flux density variation rate in a circumferential direction is 4.0 mTDeg or more in a part where the flux density in at least half of a downstream side of a developer carrying direction from the peak magnetic force position of said development pole is 90% or less.
21. In an image forming apparatus configured to form a latent image on a latent image carrier by visualizing the latent image on said latent image carrier by developing with a developer of a developing device, then transferring an image corresponding to the latent image to a recording material, and fixing to form the image, wherein a process cartridge is provided, said process cartridge is used for an image forming part of the image forming apparatus, the process cartridge detachably installed to an apparatus main body and integrally equipped with at least the latent image carrier, a charging device for charging said latent image carrier, the developing device and a cleaning device for cleaning said latent image carrier in the cartridge, wherein said developing device is equipped with a developer carrier for carrying and transporting the developer having a magnet brush with the developer raised on said developer carrier for visualizing a latent image on a latent image carrier by rubbing said latent image carrier with said magnet brush, said developer carrier comprising:
a developing sleeve for carrying and transporting the developer; and
a magnetic roll disposed within said developing sleeve having a plurality of magnetic poles,
wherein a width of a development pole forming the magnet brush to raise the developer in a developing region facing the latent image carrier is narrowed, a rising region of said developer in said developing region is narrowed to realize a narrow development nip, and a flux density attenuation ratio of said development pole is 40% or more, and
a half-value width of a flux density of said development pole is 22\xb0 or less, and a flux density variation rate in a circumferential direction is a 4.0 mTDeg or more in a part where the flux density in at least half of a downstream side of a developer carrying direction from a peak magnetic force position of said development pole is 90% or less.