摘要:
An excess toner removal area is made broader over the whole area with respect to a developer applied area that is broader than an image effective area. Thereby a liquid developer, that tends to spread slightly broader than the applied area after being applied to a photoreceptor drum, is removed by a sweep roller that can sweep excess toner present in an area broader than the original applied area and an excess toner remaining area is then prevented from being formed on the photoreceptor drum. Accordingly, the excess toner on the latent image carrier is removed as much as possible, and a transfer medium and peripheral members are prevented from being soiled due to residual excess toner.
摘要:
An attriter which applies a strong stress to a liquid developer, sufficient for generating the chemically non-equilibrium state therein, is parallel-connected with a developing unit, so that the stress is applied to a part of the liquid developer carried from a storage tank to a developing tank. However, in order to suppress crushing of the toner due to the application of excessive stress, the operation of the attriter is controlled in the following manner. That is, a charge quantity detection unit which detects the toner charge quantity of the liquid developer in the developing tank is provided, and based on the detection result thereof, the attriter is controlled.
摘要:
A liquid electrophotographic imaging apparatus contains at least one drying sheet for removing excess carrier liquid in a liquid toner toned latent image on a photoconductor surface. The drying sheet comprises a flexible substrate having a first surface and second surface; at least one oleophilic carrier liquid absorptive layer on the first surface of the flexible substrate; and the first surface of the flexible substrate facing said photoconductor surface, latent image or liquid toned latent image. The apparatus may perform a process of providing a toned image on the photoconductor with a liquid toner; contacting an absorbent drying sheet from the supply container to the toned image on the photoconductor or to the photoconductor itself after the image is transferred away; absorbing liquid carrier with the drying sheet, the drying sheet then becoming a used drying sheet; determining whether the used drying sheet is suitable for reuse as an absorbent drying sheet; and placing the used drying sheet in a container.
摘要:
Image forming apparatus which form an image on a substrate and uses a liquid developer containing toner particles and a solvent. One embodiment includes a latent image retaining body, a first developing surface facing the latent image retaining body at a first development station, a latent image forming unit, and a second developing surface facing the latent image retaining body at a second development station. The latent image retaining body has a photosensitive layer which has a dielectric constant &egr;P [C2/Nm2] and an average thickness dp [m]. The photosensitive layer retains an image developed by the first developing surface and a latent image comprising image and non-image regions formed by the latent image forming unit. The second developing surface is supplied with a developing electrical potential having an electrical potential difference &Dgr;V from an electrical potential of non-image region of the latent image. The plurality of toner particles of the first liquid developer has a volume density &rgr;m[kg/m3], a surface density mr[kg/m2], a dielectric constant &egr;r [C2/Nm2], an average radius r [m], and a density of electrical charge qr[C/kg], and the image developed on the latent image retaining body by the first developing surface has an average thickness dr [m] at the second development station. The second liquid developer has an average thickness dt [m] at the second development station and a dielectric constant &egr;t [C2/Nm2], wherein following equations are satisfied, 1 × 10 - 11 [ N ] ≤ 4 π r 3 ρ m q r 3 ( - q r m r ϵ r d r ( d r - 1 A d r m r ( - Δ V q r + ( d r 2 ϵ r + d t ϵ t ) m r ) ) ) ≤ 8 × 10 - 9 [ N ] , and A = d p ϵ p + d r ϵ r + d t ϵ t .
摘要:
A method and an apparatus for printing an image on a print medium with a liquid developer which includes a liquid carrier and a toner dispersed in the liquid carrier. The image is printed by forming a toner image having the toner from the liquid developer, and transferring the toner image to the print medium under pressure. By adjusting a complex viscosity coefficient of the toner forming the toner image to be transferred to a value satisfying the formula: 1×104
摘要:
This invention relates to a developer storage and delivery system for liquid electrophotography containing: a) a container having an open end; b) a developer inside said container wherein said developer has a viscosity greater than 10 pascal second; and c) a heater near said open end wherein said heater lower the viscosity of said developer to less than 0.01 pascal second.
摘要:
The present invention employs a thickness detecting mechanism including a system for emitting polarized light and a reception system for receiving reflected light and generating electric signals. By use of this thickness detecting mechanism, the thickness of a toner layer attached to a latent image is measured. Developing conditions are controlled in relation to the measured thickness.
摘要:
A liquid developing device comprises a storage tank, a concentration sensor, a level sensor, a concentrated-ink supply pump, a carrier supply pump, an ink discharge pump, and a controller. The storage tank stores ink, including toner and carrier, for developing a photoconductor. The concentration sensor measures a concentration of ink to be supplied to the photoconductor. The level sensor measures the amount of ink stored in the storage tank. The concentrated-ink supply pump sends concentrated ink to the storage tank. The carrier supply pump sends carrier to the storage tank. The ink discharge pump discharges excessive ink from the storage tank. Based on measurement value and amount from the concentration tank and the level sensor, the controller controlls the concentrated-ink supply pump, the carrier supply pump, and the ink discharge pump, so that the concentration and amount of ink stored in the storage tank is retained at a predetermined level.
摘要:
A liquid electrophotographic developing apparatus capable of preventing image drift and reducing the load in the squeezing process. A developing roller faces a photoreceptor belt with a predetermined spacing to supply a liquid developer to the photoreceptor belt while rotating at a peripheral velocity in the opposite direction to that of the photoreceptor belt in a developing region thereon. A peripheral velocity ratio of the peripheral velocity to a moving velocity of the photoreceptor belt is determined so as to maximize a solid component ratio of a developed toner layer on the photoreceptor belt.
摘要:
An image forming apparatus having a spacer that maintains a given clearance between a cylindrical outer peripheral surface of the squeezing roller and a cylindrical outer peripheral surface of the cleaning roller.