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US 5,835,818 AGranted
Service life informing device for charged member, informing method thereof, process cartridge and image forming apparatus
AssigneeCanon Kasbushiki Kaisha
InventorsNorihisa Hoshika, Takashi Hibi, Takeo Shoji, Yasuyuki Ishii, Hiroaki Ogata, Eiichiro Teshima
Life of this patent
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Abstract
A life informing device for a charge body includes a body to be charged, and a charging member for charging the charge body. The charging member is adapted to receive an oscillating voltage and to be in contact with the charge body during the charging operation. Also provided is an informing device for visually or acoustically informing the user whether the charge body reaches the end of the life time thereof, based on an accumulated time of the application time during which the oscillating voltage is applied.
Claims85
A life informing device for a charge body, comprising:
- a body to be charged;
- a charging member for charging said charge body, wherein said charging member is adapted to receive an oscillating voltage and non-oscillating voltage and to be in contact with said charge body during the charging operation;
- and
- informing means for informing a user whether said charge body reaches the life time thereof, based on an accumulated time t1 of the application time during which said oscillating voltage is applied, and an accumulated time t2 of the application time of said non-oscillating voltage.
1 more element
A life informing method for a charge body, comprising:
- providing a body to be charged;
- a charging step of charging said charge body with a charging member adapted to receive an oscillating voltage and non-oscillating voltage, said charging member is adapted to be in contact with said charge body during the charging operation;
- and
- an informing step of informing a user whether said charge body reaches the life time thereof, based on an accumulated time t1 of the application time during which said oscillating voltage is applied and an accumulated time t2 of the application time of said non-oscillating voltage.
1 more element
An image forming apparatus comprising:
- an image bearing body;
- a charging member for charging said image bearing body, said charging member is adapted to receive an oscillating voltage and non-oscillating voltage, and to be in contact with said image bearing body during the charging operation;
- and
- informing means for informing a user whether said image bearing body reaches the life time thereof, based on an accumulated time t1 of the application time during which said oscillating voltage is applied and an accumulated time t2 of the application time of said non-oscillating voltage.
1 more element
A process cartridge detachably mountable on an image forming apparatus, comprising:
- an image bearing body;
- a charging member for charging said image bearing body, wherein said charging member is adapted to receive an oscillating voltage and non-oscillating voltage, and to be in contact with said image bearing body during the charging operation;
- and
- memory means for memorizing information on an accumulated time t1 of the application time during which said oscillating voltage is applied, and an accumulated time t2 of the application time of said non-oscillating voltage.
1 more element
A life informing device for a charging body, comprising:
- a body to be charged;
- a charging member for charging said charge body, wherein said charging member is adapted to receive an oscillating voltage and to be in contact with said charge body during the charging operation;
- and
- informing means for informing a user whether said charge body reaches the life time thereof, based on an accumulated time t1 of the application time during which said oscillating voltage is applied, and an accumulated time t3 of the rotation time of said charge body without application of an AC or DC voltage to said charging member.
1 more element
A life informing method for a charge body, comprising:
- providing a body to be charged;
- a charging step of charging said charge body with a charging member adapted to receive an oscillating voltage, wherein said charging member is adapted to be in contact with said charge body during the charging operation;
- and
- an informing step of informing whether a user said charge body reaches the life time thereof, based on an accumulated time t1 of the application time during which said oscillating voltage is applied, and an accumulated time t3 of the rotation time of said charge body without application of an AC or DC voltage to said charging member.
1 more element
An image forming apparatus comprising:
- an image bearing body;
- a charging member or charging said image bearing body, wherein said charging member is adapted to receive an oscillating voltage and to be in contact with said image bearing body during the charging operation;
- and
- informing means for informing a user whether said image bearing body reaches the life time thereof, based on an accumulated time t1 of the application time during which said oscillating voltage is applied, and an accumulated time t3 of the rotation time of said image bearing body without application of an AC or DC voltage to said charging member.
1 more element
A process cartridge detachably mountable on an image forming apparatus, comprising:
- an image bearing body;
- a charging member for charging said image bearing body, wherein said charging member is adapted to receive an oscillating voltage, and to be in contact with said image bearing body during the operation;
- and
- memory means for memorizing information on an accumulated time t1 of the application time during which said oscillating voltage is applied, and an accumulated time t3 of the rotation time of said image bearing body without application of an AC or DC voltage to said charging member.
1 more element
A life informing device for a charge body, comprising:
- a body to be charged;
- a charging member for charging said charge body, wherein said charging member is adapted to receive an oscillating voltage and to be in contact with said charge body during the charging operation;
- and
- informing means for informing a user whether said charge body reaches the life time thereof, based on a value k1.times.t1+k2.times.t2+ . . . +kn.times.tn, wherein t1, t2, . . . , tn are respective accumulation times in n kinds of voltage application conditions for said charging member, and k1, k2, . . . , kn are coefficients.
1 more element
A life informing method for a charge body, comprising:
- providing a body to be charged;
- a charging step of charging said charge body with a charging member adapted to receive an oscillating voltage, wherein said charging member is adapted to be in contact with said charge body during the charging operation;
- and
- an informing step of informing a user whether said charge body reaches the life time thereof, based on a value k1.times.t1+k2.times.t2+ . . . +kn.times.tn, wherein t1, t2, . . . , tn are respective accumulated times in n kinds of voltage application conditions for said charging member, and k1, k2, . . . , kn are coefficients.
1 more element
An image forming apparatus comprising:
- an image bearing body;
- a charging member for charging said image bearing body, wherein said charging member is adapted to receive an oscillating voltage and to be in contact with said image bearing body during the charging operation;
- and
- informing means for informing a user whether said image bearing body reaches the life time thereof, based on a value k1.times.t1+k2.times.t2+ . . . +kn.times.tn, wherein t1, t2, . . . , tn are respective accumulation times in n kinds of voltage application conditions for said charging member, and k1, k2, . . . , kn are coefficients.
1 more element
A process cartridge detachably mounted on an image forming apparatus, comprising:
- an image bearing body;
- a charging member for charging said image bearing body, wherein said charging member is adapted to receive an oscillating voltage and to be in contact with said image bearing body during the charging operation;
- and
- memory means for memorizing information for determining coefficients k1, k2, . . . , kn, wherein the main body of said apparatus informs a user whether said image bearing body reached the life time thereof, based on a value k1.times.t1+k2.times.t2+ . . . +kn.times.tn, wherein t1, t2, . . . , tn are respective accumulation times in n kinds of voltage application conditions for said charging member.
1 more element
Dependencies are inferred from the claim text.