Abstract:
An electrophotographic device and electrophotography are provided which undergo no significant influence of dot gain, can realize a smooth tone representation and a high tone reproduction, and are less likely to give rise to moire. According to one embodiment, in binarizing a continuous tone image, a frequency modulation screening method is used to form a latent image free from moire and having a high relative resolution. The latent image thus obtained is developed with a liquid developer to form a thin toner layer, thereby forming a toner image having no significant mechanical and optical dot gains.
Abstract:
A recording body on which an identification mark is so recorded to be optically readable and its manufacturing method. The object of this invention is to provide a recording body having an optically readable mark which can be used permanently to some extent because it has a good durability against washing and repeated mechanical forces applied to it too, and can be read accurately with almost no error because it has a good readability by an optical reader that is regarded as the life of the identitication mark. The recording body of this invention is characterized in that the body is made of extra fine fibers of 1-0.00001 denier as a main material, and is a cloth having an identification mark recorded opto-readably. The method of manufacturing the recording body is characterized in that the optically read mark is printed on the surface of the fiber cloth made of extra fine fibers of 1-0.00001 denier as a main material.
Abstract:
PROBLEM TO BE SOLVED: To make recoverable toner in a recovery container without leaking or scattering the recovered toner by arranging a means for recovering residual toner particles which have not been transferred by a transfer medium and the recovery container in an integrated unit. SOLUTION: The toner and carrier which have not been transferred to a record medium (p) remain on a photoreceptive layer passing through a transfer position. The residual toner is peeled from the surface of the photoreceptive layer by a cleaning roller 31 and dispersed in the residual carrier. After the residual toner and the residual carrier are dammed by a cleaning blade 32, they flow in a specified direction, flow into a waste liquid guide 33 and are recovered in a waste liquid tank 34. Since the tank 34 is arranged in a processing unit 2 together with a cleaning means 30, a waste liquid route from the cleaning means 30 to the tank 34 is connected when the unit 2 is taken in/out, whereby the waste liquid does not spill.
Abstract:
PROBLEM TO BE SOLVED: To easily control the temperature in the case of heating and also to shorten the latent image forming time by heating a latent image recording part to a temperature equal to or higher than Curie temperature and impressing an electric field so as to form a latent image on a latent image recording medium including a ferroelectric material. SOLUTION: An electrophotographic printer is constituted of a recording means 1, an initializing means 2, a latent image forming means 3, and a charging means 4, etc. The means 2 is controlled so that a corona charger can impress the electric field capable of nearly perfectly orienting the inside polarization of the ferroelectric latent image recording medium of a recording body 1 in one direction. The means 3 simultaneously copes with printing information in a state that a voltage controlled by a grid voltage is impressed on the latent image recording medium of the recording body 1, is irradiated with a semiconductor laser beam 302 modulated by on/off state, and is partially heated to a temp. equal to or higher than the Curie temperature, so that polarization at the part is inversed, and a polarization inversed latent image is formed. Consequently, switching time for polarization inversion can be extremely shortened.
Abstract:
PURPOSE: To provide a recording method and a recorder useful in the case of repetitively obtaining many high-quality printing matters by forming a latent image once even though the latent image is not formed at every time of repeating development, transfer and fixation in an electrophotographic process using a recording body having a ferroelectric latent image recording medium. CONSTITUTION: The recording method and the recorder include a latent image forming stage to form the latent image based on printing information on the ferroelectric latent image recording medium 1, an electrifying stage to uniformly electrify the medium 1, a developing stage to develop the latent image so as to obtain a visible image, and a transferring stage to transfer the visible image on the medium 1. In the image forming stage, the medium 1 is quickly cooled after it is heated so that the absolute value of surface potential at the latent image forming part of the medium 1 may be lower than that of the other part.
Abstract:
PURPOSE:To secure the secrecy of facsimile information by overlapping plural sheets, coloring and printing an inner side part with an external action and implementing protection print to an outer side. CONSTITUTION:Protection print is attained by printing a pattern or filling the entire face onto a front side of a sheet 1 in sheets 1,1' being a component of a pressure sensitive copying sheets. Then a coloring agent 2 subject to micro capsule is provided to a rear side of the sheet 1 and a developer 3 is coated to the surface of the sheet 1'. When the sheet formed as above is printed out by a printer, the print is recorded on the coloring face 4, then when the sheet is outputted from a facsimile equipment, the sheet is not decoded from the upper side of the sheet so long as the protection sheet 1 is not removed and the secrecy of the facsimile information is secured.
Abstract:
PURPOSE:To provide recording paper-like matter or paper-like recording body which can be used repeatedly without modifying a device in a thermal recording type printer. CONSTITUTION:A recording paper-like matter contains heat sensitive material wherein information can be visualized by discoloration principle due to the heat sensitive material which has heat sensitive reversibility, or a sheet-like recording body to be used in a thermal recording type printer having a thermal head wherein information becomes visualized state by the discoloration principle due to the heat sensitive material which has the heat sensitive reversibility.