Developer replenishing cartridge and developer replenishing method
First Claim
1. A developer replenishing cartridge, comprising:
- a developer replenishing container, anda developer, the developer replenishing cartridge being removably mountable to a developer replenishing apparatus;
wherein;
the developer replenishing container includes(i) a developer containing portion for containing the developer,(ii) a discharge port for discharging the developer contained in the developer containing portion, and(iii) a pump portion that operates so that a state where an internal pressure of the developer containing portion is lower than an atmospheric pressure and a state where the internal pressure is higher than the atmospheric pressure alternately repeatedly switch with each other;
the developer contains toner;
the toner includes toner particles each containing a binder resin and a wax, and silica fine particles present on surfaces of the toner particles;
the silica fine particles have a number-average particle diameter of primary particles of 60 nm or more and 300 nm or less;
a coverage rate of the surfaces of the toner particles with the silica fine particles is 15% or more and 95% or less;
the toner has a uniaxial collapse stress at a maximum consolidation stress of 10.0 kPa, of 2.5 kPa or more and 3.5 kPa or less; and
the developer is contained in the developer containing portion of the developer replenishing container.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is a developer replenishing cartridge excellent in accuracy with which an image forming apparatus is replenished with a developer irrespective of a use environment even when the developer is in a consolidated state. The developer replenishing cartridge includes: a developer replenishing container and a developer, being removably mountable to a developer replenishing apparatus; in which: the developer replenishing container includes a pump portion that operates so that a state where the internal pressure of a developer containing portion is lower than the atmospheric pressure and a state where the pressure is higher than the atmospheric pressure alternately repeatedly switch with each other; and the developer contains toner having a uniaxial collapse stress at a maximum consolidation stress of 10.0 kPa, of 2.5 kPa or more and 3.5 kPa or less.
46 Citations
12 Claims
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1. A developer replenishing cartridge, comprising:
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a developer replenishing container, and a developer, the developer replenishing cartridge being removably mountable to a developer replenishing apparatus; wherein; the developer replenishing container includes (i) a developer containing portion for containing the developer, (ii) a discharge port for discharging the developer contained in the developer containing portion, and (iii) a pump portion that operates so that a state where an internal pressure of the developer containing portion is lower than an atmospheric pressure and a state where the internal pressure is higher than the atmospheric pressure alternately repeatedly switch with each other; the developer contains toner; the toner includes toner particles each containing a binder resin and a wax, and silica fine particles present on surfaces of the toner particles; the silica fine particles have a number-average particle diameter of primary particles of 60 nm or more and 300 nm or less; a coverage rate of the surfaces of the toner particles with the silica fine particles is 15% or more and 95% or less; the toner has a uniaxial collapse stress at a maximum consolidation stress of 10.0 kPa, of 2.5 kPa or more and 3.5 kPa or less; and the developer is contained in the developer containing portion of the developer replenishing container. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A developer replenishing method, comprising:
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using a developer replenishing cartridge; wherein; the developer replenishing cartridge contains a developer replenishing container and a developer, the developer replenishing cartridge being removably mountable to a developer replenishing apparatus; the developer replenishing container includes (i) a developer containing portion for containing the developer, (ii) a discharge port for discharging the developer contained in the developer containing portion, and (iii) a pump portion that operates so that a state where an internal pressure of the developer containing portion is lower than an atmospheric pressure and a state where the internal pressure is higher than the atmospheric pressure alternately repeatedly switch with each other; the developer contains toner; the toner includes toner particles each containing a binder resin and a wax, and silica fine particles present on surfaces of the toner particles; the silica fine particles have a number-average particle diameter of primary particles of 60 nm or more and 300 nm or less; a coverage rate of the surfaces of the toner particles with the silica fine particles is 15% or more and 95% or less; the toner has a uniaxial collapse stress at a maximum consolidation stress of 10.0 kPa, of 2.5 kPa or more and 3.5 kPa or less; and the developer is contained in the developer containing portion of the developer replenishing container.
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Specification