Abstract: It is an object of the invention to provide a dielectric drum where manufacturing costs can be reduced while keeping pressure resistance high and having an anodic oxidized film with a uniform dielectric characteristic, and also to provide an electrostatic recording device which is inexpensive and provides a high image reliability using the dielectric drum. According to the present invention, a dielectric drum includes an aluminum substrate and a dielectric layer of an anodic oxidized film on the surface of the aluminum substrate. The aluminum substrate is produced by conducting a drawing and hardening treatment M on an aluminum alloy pipe of the 5000 series alloys of the Aluminum Association. Also, the dielectric drum is used to construct an electrostatic recording device.

Abstract: Apparatus for pattern generation on a dielectric substrate including a drum having an outer pattern receiving and retaining dielectric substrate, a plurality of electrodes mounted in the drum and being arranged so as to underlie the outer pattern receiving and retaining dielectric substrate, imagewise voltage supply circuitry for imagewise application of voltage to the plurality of electrodes, and an elongate ion source operative to apply a flow of charges to the dielectric substrate in a non-imagewise manner.

Abstract: Charged toner is transferred from an image member (such as an image cylinder or belt) to a web of imagable material (typically paper), preferably utilizing a rotating conductive impression cylinder. The toner, having a first polarity, is applied to the image member. The paper web, typically by contact with the impression cylinder, is moved into contact with the image member so that the toner transfers from the image member to the web under pressure. Even despite a high speed of movement of the web (e.g. 200 feet per minute or more), toner back scatter is substantially prevented by applying an electrical bias of the first polarity to the impression cylinder so as to impose an electric force field on the toner particles of sufficient intensity to overcome aerodynamic drag forces which would separate particles from the image areas between the impression cylinder and the image member.

Abstract: A charge carrier medium 1 including an insulating layer 11 laminated on an electrically conductive layer 12 with an electrostatic latent image 2 recorded on the insulating layer 11 is brought into contact with water, etc., to resurrect the attenuated potential. Alternatively, the charge carrier medium 1 is previously immersed in water, etc., to deposit onto the surface thereof charges opposite in polarity to those of the electrostatic latent image 2 generated by charging, thereby attenuating the surface potential. This makes any external access to the image information impossible. In reading the image information, a PET film 5 or the like is brought into close contact with the surface of the charge carrier medium 1, and is then peeled apart from that surface to remove the charges of the opposite polarity and thereby resurrect the image information for reading.

Abstract: A heating element (30) for a device for fixing images in photocopiers or information printed by a printer on media (12) having different formats is formed by a layer of resistive material having a negative temperature coefficient (NTC), so that, in the portion of the heating element (30) not covered by a medium of any smaller format, the quantity of heat supplied and the temperature of the heating element are automatically adjusted without the use of a special control circuit.

Abstract: A serial type electrophotography printer includes a transport mechanism for transporting a recording sheet in a transport direction, a carriage including a process part and a fixing unit, where the process part includes an image bearing member rotatable about a rotary axis parallel to the transport direction of the recording sheet and a toner developing a latent image formed by charging the image bearing member, the fixing unit includes a rotatable fixing member and a heater for heating the fixing member, and the fixing member fixes a developed image which is transferred onto the recording sheet from the image bearing member, a driving mechanism for rotating the image bearing member and the fixing member when the carriage is moved to carry out developing, transfer and fixing processes with respect to the recording sheet, and for rotating at least one of the image bearing member and the fixing member during a predetermined time other than the time when the carriage is moved to carry out the developing, transfe

Abstract: An electrophotographic printing machine includes a transporting part for transporting a recording medium, and a carriage movable in a first direction transverse to a second direction in which the recording medium is transported. The carriage includes a process unit for forming a latent image on an image carrier of a drum shape, and a fixing unit having a fixing member of a drum shape for thermally fixing a transferred image corresponding to the latent image on the recording medium. A transfer part, which is provided at a first side of the recording medium opposite to a second side thereof at which the carriage is located, transfers the latent image on the recording medium to thereby form the transferred image. A moving part moves the carriage in the first direction. A driving part controls the carriage so that the image carrier and the fixing member move at an identical relative paper feeding quantity in tune with a movement of the carriage by the moving part.

Abstract: An image forming apparatus detects a potential of a latent image of a reference gradation pattern formed on a photosensitive member and controls the latent image potential so as to be fixed to maintain a good gradation characteristic.