Minolta Camera Kabushiki Kaisha

Minolta Company, Ltd.

Minolta Camera Co., Ltd.

Susumu Tanaka

Kenichi Wada

Tateki Oka

Yuji Enoguchi

Hidetoshi Kawabata

Takaji Kurita

Hiroshi Murasaki

Kenji Tabuchi

Takao Fujiwara

Masaya Ogawa

Junji Machida

Masazumi Yoshida

Kaoru Takebe

Kaoru Furusawa

Takashi Sugiyama

Shoji Kondo

Koji Nagai

Kuniki Seino

Hiroaki Mizunoe

Sanzi Inagaki

Hiroshi Mizuno

Kenji Shibazaki

Keiji Nakatani

Sanji Inagaki

Atsuyuki Tanaka

Katsutoshi Konishi

Shinji Takiguchi

Yoshihiro Isono

Yasuko Takama

A main body of a regenerating apparatus of a recording medium has a conveyor mechanism which conveys a recording medium to be regenerated along a conveyance passage. A cleaning unit is removably mounted on the main body for easy maintenance, cleaning or replacement. Preferably, the cleaning unit has a U-shaped conveyance passage of the recording medium filled up with a cleaning liquid, and an image removing mechanism which applies a physical treatment to the surface of the recording medium. The recording medium is taken in the U-shaped conveyance passage, immersed in the cleaning liquid so that the image on the recording medium is swollen and removed by the image removing mechanism. The image removing mechanism may include a web impregnated with cleaning liquid brought into contact with the recording medium by a roller which may have a built-in heater to cause the printing material on the recording medium to swell and be scraped off by the web.

Regenerating apparatus of recording medium

An apparatus for regenerating a recording medium has a feeder which feeds a recording medium, a transporter which transports the recording medium, an immersion bath for containing a cleaning liquid for swelling prints and immersing the recording medium in the cleaning liquid, a print remover which removes the prints by subjecting the surface of the recording medium to a physical treatment, and a fluidizing structure for fluidizing the cleaning liquid in a direction opposite to a direction in which the recording medium is transported in the immersion bath.

Apparatus for regenerating recording medium

The present invention provides a cleaning solution for recycling a waste copy paper with toner-images formed on the surface of the copy paper, comprising water, a monoester of bivalent organic acid, a surface active agent and an organic acid.

Cleaning solution for recycling recording member having toner images

A method for cleaning waste paper by removing toner-images formed thereon. An emulsion formed cleaning solution, which has a water component, an organic solvent dissolving a resin component, and a surface active agent to form a solution into the emulsion, is applied to the waste paper. The waste paper has a toner-image which is formed by toner-particles which have a resin component. The distance between the fibers of the paper is widened by the water component of the cleaning solution. The resin component of the toner is dissolved by the organic solvent of the cleaning solution.

Method of recycling a waste recording member

The present invention relates to a method for fixing images formed by a printing material containing a resin component on a recording medium, comprising: a first step of providing the printing material to the recording medium to form the images, and a second step of contacting the printing material provided on the recording medium with a fixing solution to fix the printing material on the recording medium, the fixing solution comprising a monoester of bivalent organic acid.

Fixing solution containing monoester of bivalent organic acid and fixing

A programmable copying apparatus is provided which permits an operator to be informed of the exact time that the copying operation input by him into the machine will be completed, even with multiple copying operations.

Programmable copying apparatus

The invention relates to a method of forming monochromatic or dichromatic copy images with use of a developer composed of a high-resistivity magnetic carrier and a nonmagnetic insulating toner which are triboelectrically chargeable. An electrostatic latent image having at least three different levels of potentials is formed and the toner and carrier are adhered respectively onto first and second image portions.

Method of forming monochromatic or dichromatic copy images

The invention disclosed concerns a method of forming dichromatic copy images. An electrostatic latent image having a first image portion and a second image portion is formed. The first image portion is developed by a first magnetic brush developing device using at least a magnetic toner of first color triboelectrically chargeable to a specific polarity. The second image portion is developed by a second magnetic brush developing device using a mixture of a magnetic carrier substantially not triboelectrically chargeable with the magnetic toner and a non-magnetic toner of a second color triboelectrically chargeable to a polarity opposite to that of the magnetic toner by contact with the magnetic carrier.

Method of forming dichromatic copy images

An image forming method which includes following steps:

Image forming method using three component developer

A dry process developing method for application to electrophotography which includes the steps of mixing magnetizable toner and electrically insulating non-magnetizable toner at a predetermined ratio to form developing material, and applying said developing material onto a electrical potential pattern or electrostatic latent image formed on a recording medium for developing the latent image into visible toner image. For effecting the foregoing developing method, a developing apparatus is provided with an improved developing material supplying device for efficient developing.

Dry process developing method and device employed therefor

The disclosure is directed to a heat roller fixing device for use in an electrophotographic copying apparatus and the like, which includes a heating roller constituted by laminating an offset prevention layer on an electrically conductive core member and having a heating element incorporated in it so as to be driven for rotation by a driving unit, and a pressure roller constituted by forming an electrically insulative layer on another electrically conductive core member and held in contact under pressure with the heating roller for simultaneous rotation with the heating roller, so as to fix toner image formed on copy paper onto the copy paper by causing the copy paper carrying the toner image on it, to pass between the heating roller and pressure roller. The offset prevention layer is composed of fluorine resin containing carbon fibers in a combined amount of less than 30%.

Offset prevention layer for heat roller fixing device

An electrographic copying machine of the powder image transfer type in which a channel for transporting the developer recovered by a cleaner to a developing unit includes an assembly for removing foreign matter from the developer. The developing unit is adapted to develop latent electrostatic images with a magnetic developer which is a mixture of finely divided insulating toner and a magnetic carrier having small size particles and a resistivity of at least 10.sup.13 ohm-cm. The assembly has a nonmagnetic hollow cylindrical member for guiding the developer, a magnetic transport member disposed within the cylindrical member for transporting the developer, a foreign matter removal opening formed in the lower wall of the cylindrical member, and magnets for forming a magnetic field for attracting the magnetic carrier contained in the portion of the developer positioned in the vicinity of the opening upwardly in the cylindrical member.

Electrographic copying machine of powder image transfer type

A dry developing powder composition particularly suited for use in electrophotographic reproduction which comprises a magnetic toner of 35 to 50 microns in average particle size mixed with a non-magnetic toner of 5 to 30 microns in average particle size. The amount of the magnetic toner used is within the range of 85 to 98% by weight relative to the total weight of the composition and the amount of the non-magnetic toner used is within the range of 2 to 15% by weight relative to the total weight of the composition.

Powdery developing material for electrophotographic reproduction

A copy paper separating method for use in an electrophotographic copying apparatus which forms a latent electrostatic image on a recording member is provided. The method includes the step of depositing fine particles having insulating properties and charged to a polarity opposite of that of the toner image on the surface of the recording member before the copy paper is placed over the recording member, to cause the particles to reduce the electrostatic attraction between the copy paper and the recording member, thereby facilitating separation of the copy paper from said recording member.

Copy paper separating method for use in electrophotographic copying

The present invention is concerned with a developer removing device for a copying apparatus. An electrostatic latent image is developer by a magnetic brush developing using a developer mix of magnetic carriers of small diameter and insulative non-magnetic toner charged to polarity opposite to one another and in which some of the magnetic carriers are transferred onto the background portion of the latent image. The developer removing device has a structure for removing the magnetic carriers adhering to the background portion at least either by magnetic force or electrostatic force.

Growing community of inventors

Sakai, Japan

Susumu Tanaka