1. A transfer member comprising:
a shaft; and
a body that is supported by the shaft, wherein when a measurement member extending in an axial direction of the shaft is brought into contact with an outer surface of the body and voltage applied to the measurement member is changed by electrically connecting the shaft to ground, a time constant measured based on a change in electric potential occurring on a surface of the measurement member is defined as a first time constant \u03c4v s, wherein when a first measurement member extending in the axial direction is brought into contact with the outer surface of the body, a second measurement member extending in the axial direction is brought into contact with the outer surface of the body while being spaced apart from the first measurement member by a predetermined distance in a circumferential direction of the outer surface of the body, and voltage applied to the first measurement member is changed by electrically connecting the shaft to ground, a time constant measured based on a change in electric potential occurring on a surface of the second measurement member is defined as a second time constant \u03c4s s, and wherein the first time constant \u03c4v s is larger than the second time constant \u03c4s s.
2. The transfer member according to claim 1,
wherein when an Asker C hardness of the outer surface of the body is defined as H, the Asker C hardness H, the first time constant \u03c4v s, and the second time constant \u03c4s s are set in the body such that (1H)\xd70.5<\u03c4s<\u03c4v is satisfied.
3. The transfer member according to claim 1,
wherein the body has an electrical-conductivity additive blended therein, and wherein the electrical-conductivity additive is distributed more densely toward the outer surface of the body from the shaft.
4. The transfer member according to claim 1,
wherein the body has an electrical-conductivity additive blended therein, and wherein the electrical-conductivity additive is uniformly distributed in the circumferential direction of the outer surface of the body.
5. The transfer member according to claim 1,
wherein the body has an electrical-conductivity additive blended therein, and wherein the electrical-conductivity additive is distributed in the body such that a distance between portions of the electrical-conductivity additive in the circumferential direction of the outer surface of the body is shorter than a distance between portions of the electrical-conductivity additive in a direction extending from the shaft toward the outer surface of the body.
6. An image forming apparatus comprising:
an endless-belt-shaped image bearing member;
the transfer member according to claim 1 that transfers a visible image on a surface of the image bearing member onto a medium; and
a fixing device that fixes the visible image transferred on the medium.
7. The image forming apparatus according to claim 6, further comprising:
an electrically-conductive cleaning member that is disposed downstream, in a rotational direction of the transfer member, of a facing region in which the transfer member faces the image bearing member and that cleans the transfer member, the cleaning member being electrically connected to ground.
8. The image forming apparatus according to claim 7,
wherein when a distance from a downstream end of the facing region in the rotational direction of the transfer member to a position where the cleaning member comes into contact with the transfer member is defined as La mm, the cleaning member is disposed at a position that satisfies:
La\u2266{(\u03c4v\u03c4s)1.25}\xd712\u03c0.
9. The image forming apparatus according to claim 7,
wherein the cleaning member includes
a first cleaning member that has a brush portion having a plurality of bristles, and
a second plate-shaped cleaning member that is disposed downstream of the first cleaning member in the rotational direction of the transfer member and that cleans the transfer member.
10. The image forming apparatus according to claim 9,
wherein the transfer member has a surface whose ten-point medium height is set to 2.0 \u03bcm or smaller.
11. The image forming apparatus according to claim 9,
wherein the first cleaning member has a rotation shaft and the brush portion having the bristles extending radially around the rotation shaft, and
wherein the image forming apparatus further comprises:
a supplying section that supplies a lubricant, which lubricates the transfer member and the second cleaning member, by coming into contact with the brush portion at an upstream side, in a rotational direction of the first cleaning member, of a position where the first cleaning member comes into contact with the transfer member.
12. The image forming apparatus according to claim 7, further comprising:
a power source that applies voltage between the image bearing member and the transfer member, the power source being capable of only applying voltage with a polarity for transferring the visible image on the surface of the image bearing member onto the medium.
13. The image forming apparatus according to claim 6, further comprising:
an electricity removal member that removes electricity from the medium at a downstream side, in a transport direction of the medium, of a facing region in which the transfer member faces the image bearing member.
14. The image forming apparatus according to claim 13,
wherein the electricity removal member has an electricity removal section that removes electricity from the medium, the electricity removal section being disposed upstream, in a rotational direction of the transfer member, of an imaginary line that connects a position on the transfer member, at which a distance Lb mm from a central position of the facing region of the transfer member in the rotational direction of the transfer member satisfies Lb={(\u03c4v\u03c4s)1.94}\xd76\u03c0, and a rotation axis of the transfer member.
15. An image forming apparatus comprising:
an image bearing member;
a latent-image forming device that forms a latent image onto a surface of the image bearing member;
a developing device that develops the latent image on the surface of the image bearing member into a visible image;
an endless-belt-shaped intermediate transfer body that is disposed facing the image bearing member;
a first-transfer unit that transfers the visible image on the surface of the image bearing member onto a surface of the intermediate transfer body;
a support member that supports the intermediate transfer body in a movable manner;
a transfer member that is disposed facing the intermediate transfer body and that transfers the visible image on the surface of the intermediate transfer body onto a medium passing through a facing region in which the transfer member faces the intermediate transfer body, the transfer member having a shaft and a body supported by the shaft, wherein when a measurement member extending in an axial direction of the shaft is brought into contact with an outer surface of the body and voltage applied to the measurement member is changed by electrically connecting the shaft to ground, a time constant measured based on a change in electric potential occurring on a surface of the measurement member is defined as a first time constant \u03c4v s, wherein when a first measurement member extending in the axial direction is brought into contact with the outer surface of the body, a second measurement member extending in the axial direction is brought into contact with the outer surface of the body while being spaced apart from the first measurement member by a predetermined distance in a circumferential direction of the outer surface of the body, and voltage applied to the first measurement member is changed by electrically connecting the shaft to ground, a time constant measured based on a change in electric potential occurring on a surface of the second measurement member is defined as a second time constant \u03c4s s, wherein a volume resistance value of the body is defined as Rv \u03a9, wherein a surface resistance value of the body is defined as Rs \u03a9, wherein a peripheral speed of the outer surface of the body is defined as v mms, wherein a length of the facing region in a transport direction of the medium is defined as L mm, and wherein the first time constant \u03c4v s, the second time constant \u03c4s s, the volume resistance value Rv \u03a9 of the body, the surface resistance value Rs \u03a9 of the body, the peripheral speed v mms of the outer surface of the body, and the length L mm of the facing region in the transport direction of the medium are set such that (Lv)\xd7(RvRs)<\u03c4s<\u03c4v is satisfied; and
a fixing device that fixes the visible image transferred on the medium.
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 method for synchronizing a state of a second terminal to a state of a first terminal in a case where the first terminal is docked on the second terminal through a plurality of interfaces, the state synchronizing method between docked terminals comprising:
determining by the first terminal whether or not the first terminal is interlocked to the second terminal;
turning off signal which the first terminal transmits to a TMDS data line, when it is determined that the first terminal is not interlocked to the second terminal; and
entering by the second terminal into sleep mode, when it is confirmed that the signal received from the TMDS data line is turned off.
2. The method as claimed in claim 1, further comprising:
determining whether or not the second terminal satisfies conditions of entering into sleep mode, and
wherein the entering by the second terminal is characterized in that the second terminal enters into sleep mode, when it is confirmed that the signal received from the TMDS data line is turned off, after satisfying conditions of entering into sleep mode.
3. The method as claimed in claim 1, further comprising:
determining whether or not the first terminal entered into an android sleep state which is applied in the android platform; and
wherein the determining is characterized in that the first terminal determines whether or not the first terminal is interlocked to the second terminal when the first terminal enters into the android sleep state.
4. The method as claimed in claim 1,
wherein the first terminal is characterized to be a mobile phone, and the second terminal is a desktop, tablet PC or laptop which contains space where the first terminal can be docked on, and
information processed in the mobile phone is output in the desktop, tablet PC or laptop when the mobile phone is interlocked on the desktop, tablet PC or laptop.
5. A system for synchronizing a state of a second terminal to a state of a first terminal in a case where the first terminal is docked on the second terminal through a plurality of interfaces, the state synchronizing system between docked terminals comprising:
a first terminal which turns off signal transmitted to a TMDS data line, when it is determined that the first terminal is not interlocked on the second terminal; and
a second terminal which enters into sleep mode when it is confirmed that the signal received from the TMDS data line is turned off when conditions for entering into sleep mode are satisfied.