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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 8135310 | Image forming apparatus with translation cam member An image forming apparatus includes a detaching and pressing mechanism for releasing developing rollers of developer cartridges mounted in a drum unit from photosensitive drums and pressing the developing rollers on the photosensitive drums. The detaching and pressi... | 03/13/2012 |
| 8019256 | Multi-mode long life monochrome printing system A multi-mode, long life monochrome printing system that includes (a) a media supply assembly having a media path (b) a moveable intermediate transfer member for receiving images from image output terminal assemblies and for transferring the images to media on the me... | 09/13/2011 |
| 8005403 | Image forming apparatus with movable developing unit An image forming apparatus includes: a latent image bearing member on which an electrostatic latent image is to be formed; a developing unit which contains the developer and performs a development process to develop the electrostatic latent image formed on the laten... | 08/23/2011 |
| 7986906 | Image-forming device having mechanism for separating developing rollers from photosensitive drums A laser printer includes a contact/separation mechanism that linearly moves developing cartridges between contact positions where the developing cartridges contact corresponding photosensitive drums and separating positions where the developing cartridges separate f... | 07/26/2011 |
| 7881637 | Method and apparatus for controlling multiple color developers using a camming mechanism Aspects of this disclosure describe a multi-pass printer having a photoreceptor device mounted on an axis, a developer that is arranged adjacent to the photoreceptor device and is movable between a first position and a second position, and a camming mechanism mounte... | 02/01/2011 |
| 7826773 | Image forming apparatus performing selective driving force transmission to mounted process cartridges An image forming apparatus detachably mounts black and non-black cartridges each including a photosensitive drum and a developing roller. The apparatus includes a driving source; first and second clutches for connecting and disconnecting between the driving source a... | 11/02/2010 |
| 7826774 | Methods to control transitions between color printing and black-only printing in an image forming device The present application is directed to methods for transitioning between color printing and black-only printing in an image forming device. A cartridge is moved between a first position in which color printing may occur and a second position in which black-only prin... | 11/02/2010 |
| 7809311 | Camming method and apparatus for controlling color developers for non-contact development A developer camming apparatus connected to a developer unit, including a slide, a motor, and an encoder, wherein the encoder determines a distance a developer unit is from the photoreceptor, wherein the encoder allows the developer unit to be sufficiently close to e... | 10/05/2010 |
| 7792464 | Image-forming device having mechanism for separating developing rollers from photosensitive drums A laser printer includes a contact/separation mechanism that linearly moves developing cartridges between contact positions where the developing cartridges contact corresponding photosensitive drums and separating positions where the developing cartridges separate f... | 09/07/2010 |
| 7787805 | Image forming apparatus with translation cam member An image forming apparatus includes a detaching and pressing mechanism for releasing developing rollers of developer cartridges mounted in a drum unit from photosensitive drums and pressing the developing rollers on the photosensitive drums. The detaching and pressi... | 08/31/2010 |
| 7734226 | Lift mechanism for one or more developer members in an image forming device The present application is directed to devices and methods to position a developer member relative to a photoconductive member in an image forming device. One embodiment includes an elongated lift plate positioned in proximity to a photoconductive member. An elongat... | 06/08/2010 |
| 7680441 | Image forming apparatus An image forming apparatus is provided. The image forming apparatus includes a plurality of developing units. A cam shaft includes a plurality of cams having different rotation phases respectively corresponding to the plurality of developing units. A regulation mean... | 03/16/2010 |
| 7606517 | Image forming apparatus having a power controlling device that controls power supplied to developers Provided is an image forming apparatus for printing a desired image. The image forming apparatus comprises a first developing unit comprising a first fixed power transmission unit, a second developing unit comprising a second fixed power transmission unit, a first s... | 10/20/2009 |
| 7590372 | Multi-pass type color image forming apparatus A multi-pass type color image forming apparatus. The multi-pass type color image forming apparatus includes an indicating member which is provided at a camshaft and has a plurality of indicating portions, a sensing part which detects the plurality of indicating port... | 09/15/2009 |
| 7555245 | Image forming apparatus with cam members An image forming apparatus includes a detaching and pressing mechanism for releasing developing rollers of developer cartridges mounted in a drum unit from photosensitive drums and pressing the developing rollers on the photosensitive drums. The detaching and pressi... | 06/30/2009 |
| 7469118 | Image forming apparatus with position changing developing devices An image forming apparatus that inhibits malfunctions therein via control such that respective developing devices change positions at predetermined timings. In a color laser printer, a first position is a position on a photosensitive drum facing a developing roller ... | 12/23/2008 |
| 7444103 | Image-forming device and developing unit used therein In an image-forming device including an image-carrying member, a developer-carrying member, and a casing having an inner space in which developer is accommodated and the developer-carrying member is supported, both a pushing force and a separating force are not appl... | 10/28/2008 |
| 7428396 | Power transmitting device for developing device and image forming apparatus with the same A power restricting device for a developing device of an image forming apparatus and an image forming apparatus with the same are disclosed. The power restricting device for a developing device of an image forming apparatus includes a driving section with at least o... | 09/23/2008 |
| 7395014 | Image forming apparatus An improved image forming apparatus comprises a first developing unit comprising a photosensitive body. Also provided is a second developing unit including a developing roller which is moveably installed so that the developing roller selectively contacts the photose... | 07/01/2008 |
| 7376373 | Image forming apparatus having a power transmitting device to selectively operate developing units thereof An electrophotographic image forming apparatus is provided that includes a plurality of developing units, a cam shaft, and a plurality of cams disposed on the cam shaft corresponding to the respective developing units. A power transmitting device disposed between th... | 05/20/2008 |
| 7315714 | Image forming apparatus including a controller for controlling a moving speed of a moving member holding a plurality of developing devices An image forming apparatus includes a controller controlling a movement of a moving member to successively move a plurality of developing devices to a developing position in an image forming operation. A moving distance in at least one moving operation is different ... | 01/01/2008 |
| 7308221 | High developing voltage supply apparatus A high developing voltage supply apparatus includes solenoid power switches, and a high developing voltage driver selectively outputting a solenoid driving signal to close one of the solenoid power switches to electrically close a corresponding mechanical contact, a... | 12/11/2007 |
| 7302201 | Voltage switch and electrophotographic color image forming apparatus using the same A voltage switch for connecting a power supply with a plurality of development units in sequence, and an electrophotographic color image forming apparatus using the voltage switch. In the voltage switch, a first terminal is arranged on a circuit board and is connect... | 11/27/2007 |
| 7289135 | Color image-forming apparatus controlling timing of color pattern formation A color image-forming apparatus including two drums, two scanners for forming latent images on the two drums, four developing devices for developing the latent images on the drums into toner images with four colors, an intermediate transfer belt successively passing... | 10/30/2007 |
| 7289757 | Shared high voltage power supply for image transfer in an image forming device An image transfer assembly in a color printer or the like includes four image forming units. Each of the image forming units includes a photoconductive unit and a transfer device. A voltage is applied to the transfer device thereby creating a voltage potential betwe... | 10/30/2007 |
| 7266321 | Apparatus for supplying voltage to developing device A voltage supply device for developing devices of a color image forming apparatus has a printed circuit board (PCB) connected with a high voltage supply source, a plurality of fixed contact point terminals provided at one end of the respective color developing devic... | 09/04/2007 |
| 7263309 | Desktop color image forming apparatus and method of making the same The present invention relates to an electrophotographic color image forming apparatus using a tandem-drum development, an indirect image-transfer method, and a vertical sheet supply path. An intermediate image-transfer member is angled relative to a horizontal line ... | 08/28/2007 |
| 7248820 | Color image forming apparatus and a method for operating In order to provide a color image forming apparatus and its control method capable of obtaining high-quality output images without image variations or the like even when the kind of image is changed, there is provided a color image forming apparatus including a plur... | 07/24/2007 |
| 7203441 | Image forming apparatus and method for controlling the pre-rotation of a reflecting member An image forming apparatus includes an input portion to input data, an image forming portion to form a latent image on an image carrying member by irradiating a laser beam onto a reflecting member rotatably driven by a motor and irradiating light reflected by the re... | 04/10/2007 |
| 7200350 | Image forming apparatus switching developing rollers of mounted process cartridges between contact and spaced states and switching the contact position of a feeding belt contactable to drums of the mounted cartridges A color electrophotographic image forming apparatus for forming an image on a recording material, includes (i) a mounting portion for detachably mounting process cartridges developing images with different colors and each including an electrophotographic photosensit... | 04/03/2007 |
| 7177573 | Image forming apparatus with reversely rotated developer bearing members An image forming apparatus including an image bearing member bearing latent images; a developing unit including plural developing devices developing the latent images with developers to form visual images, each developing device including a developer bearing member ... | 02/13/2007 |
| 7177575 | Image forming apparatus An image forming apparatus includes a main body; a photosensitive member on which a latent image is formed; a cartridge detachably attached to the main body and accommodates a developing agent therein; a developing roller provided at the cartridge, the developing ro... | 02/13/2007 |
| 7164873 | Image forming apparatus The present invention provides an image forming apparatus which, when switching operation from color image forming operation to monochromatic image forming operation, forms a monochromatic image on each of a prescribed number of sheets by stopping a part of the func... | 01/16/2007 |
| 7162187 | Image forming apparatus and image forming method In an image forming apparatus, a toner image is formed on a photosensitive element and a transfer roller, which carries a transfer medium, is pressed against a photosensitive element at a pressure of from 20.4 N/cm2 to 200 N/cm2. ... | 01/09/2007 |
| 7158740 | Image forming apparatus An image forming apparatus includes an image bearing member; a plurality of developing devices for developing electrostatic images formed on the image bearing member with developers, the developing devices including respective developer carrying members for carrying... | 01/02/2007 |
| 7135260 | Imaging system The invention provides an imaging system wherein toners of two or more colors are used to form toner images and the toner images are successively used to form a color image on a recording material. The imaging system can form an image with high transfer efficiency. ... | 11/14/2006 |
| 7110014 | Image forming apparatus An image forming apparatus includes a plurality of removable developing units each of which has an image carrier whose width is narrower than a width of a printable area of the printing paper, and a driving unit for driving the plurality of the removable developing ... | 09/19/2006 |
| 7099029 | Method for aligning two or more independent printing systems with a single control unit and intelligent print controllers A method and system receives a print job from a host device, parses the print job into individual print data for at least two separate printing devices, generates a random set of marks for identification of the print job, embeds the identification marks into the ind... | 08/29/2006 |
| 7082281 | Electrophotographic printer having movable pre-transfer erasing unit An electrophotographic printer including a pre-erasing unit. The pre-erasing unit includes a pre-erasing lamp to irradiate light, and a pre-transfer erasing lens to induce the light generated from the pre-transfer erasing lamp to the photosensitive drum, movably ins... | 07/25/2006 |
| 7068956 | Image forming apparatus and control method for the image forming apparatus An image forming apparatus, including: an image bearing member on a surface of which an electrostatic latent image is formed; a developing device which contains a developer and which has a rotatable developer carrying member, which abuts against the surface of the i... | 06/27/2006 |
