摘要:
In a copying machine comprising a photosensitive drum having an amorphous silicon type photoconductive layer, if an image of an original is focussed on the photoconductive layer with a light having a wavelength shorter than 600 nm, the light fatigue of the amorphous silicon photoconductive layer is prevented, and the image memory phenomenon owing to the light fatigue is effectively obviated.
摘要:
Disclosed is an electrophotographic apparatus comprising a photosensitive drum comprising an amorphous silicon type photoconductor layer formed on an electroconductive substrate, a main charging mechanism for charging the surface of the drum with charges having a predetermined polarity, an imagewise exposure mechanism for forming an electrostatic image corresponding to an image of an original on the surface of the drum, a toner development mechanism for forming a toner image corresponding to the electrostatic image, a toner image transfer mechanism for transferring the toner image formed on the surface of the photosensitive drum to a predetermined paper sheet, a toner cleaning mechanism for removing the residual toner adhering to the surface of the photosensitive drum and a fixing mechanism for fixing the transferred toner image to said paper sheet, wherein a heating mechanism is arranged to heat the surface of the photosensitive drum at a temperature of 30.degree. to 40.degree. C.The problem of the flow of an image inherent to the use of an amorphous silicon type photoconductive layer is effectively solved if this electrophotographic apparatus is employed.
摘要:
In an electrophotographic developing method using a magnetic brush consisting of a mixture of magnetic carrier and an electroscopic toner, development is carried out at a toner concentration (Ct. %) in the mixture, which satisfies the requirement represented by the following formula: ##EQU1## wherein Sc stands for the specific surface area (cm.sup.2 /g) of the carrier, St stands for the specific surface area (cm.sup.2 /g) of the toner, and k is a number of from 0.90 to 1.14.A toner image having a high quality can be obtained according to this method.
摘要:
A two-component electrophotographic developer for use in developing a latent electrostatic image of a low potential. The developer is composed of a mixture of a magnetic carrier of spherical sintered ferrite particles having raised and depressed portions attributed to the primary particles on their surface, a median size of from 30 to 50 micrometers, an apparent density of less than 2.6 g/cc and an electric resistance, measured in the form of a magnetic brush, of from 6.times.10.sup.4 to 2.5.times.10.sup.6 ohms and chargeable toner particles having a volume inherent resistivity of at least 1.times.10.sup.13 ohms-cm and a specific inductive capacity of from 4 to 6. In a preferred embodiment, the chargeable toner particles have a median size of from 10 to 14 micrometers and are substantially free from particles having a particle diameter of not more than 5 micrometers. The developer can give an image of a high density, a high resolution and excellent gradation without brush marks.
摘要:
An operation section (28) of an image forming apparatus main body (2) comprises an operation display panel (30) for displaying letters and/or symbols representing various functions with respect to an image forming operation to allow an operator to select a desired function, and a status display panel (40) for displaying an image representing a growth stage and/or an appearance of a living thing such as a fish to show a current status of the main body (2). Accordingly, the current status of main body (2) is visually displayed on a display panel by association with a growth stage and/or an appearance of an actual living thing or an imaginary living thing, thereby enabling the operator to quickly see the present status of the apparatus.
摘要:
An operation section (28) of an image forming apparatus main body (2) comprises an operation display panel (30) for displaying letters and/or symbols representing various functions with respect to an image forming operation to allow an operator to select a desired function, and a status display panel (40) for displaying an image representing a growth stage and/or an appearance of a living thing such as a fish to show a current status of the main body (2). Accordingly, the current status of main body (2) is visually displayed on a display panel by association with a growth stage and/or an appearance of an actual living thing or an imaginary living thing, thereby enabling the operator to quickly see the present status of the apparatus.