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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7362480 | Method and system for changing a scanning resolution A method and system for scanning comprises rotating a scanning chassis of an optical scanner to create an acute angle between the scan line and a scanning direction, such that the scanning chassis has two ends, and moving the scanning chassis in the scanning directi... | 04/22/2008 |
| 7167291 | Optical scanning apparatus and image forming apparatus using the same An optical scanning apparatus can satisfactorily correct a field curvature caused by spherical aberration in an incidence optical system. A light beam emitted from a light source is guided to an optical deflector for deflecting the light beam through a first optical... | 01/23/2007 |
| 7149016 | Optical element and scanning optical system having the same and image forming apparatus An optical element that can reduce Fresnel (surface) reflection on a lens surface to be a cause of flare or ghost, and a scanning optical system having the same are provided. A microstructure grating is provided on at least one optical surface of the optical element... | 12/12/2006 |
| 7088382 | Imaging optical system, image forming apparatus having the same, and a method therefor An image forming apparatus includes a semiconductor laser array to emit a plurality of laser beams through a plurality of independently controllable laser elements according to an image signal, an imaging optical system to magnify the laser beams emitted from the la... | 08/08/2006 |
| 7048394 | Mechanism for adjustable installation of band plate-like member A mechanism for adjustable installation of band plate-like members facilitates the separate adjustment of a cylindrical mirror in the normal direction of the reflecting face of the mirror, in a direction intersecting the normal direction, and the orientation of the ... | 05/23/2006 |
| 7009629 | Image forming apparatus with optical adjustors An image forming apparatus including a photoreceptor having an image carrying surface, first and second exposing devices to expose the image carrying surface to form first and second latent images, and first and second developing devices to develop the first and sec... | 03/07/2006 |
| 6937407 | Transmission device for a two dimensional image display module to display an image in the module A transmission device for a 2D image display module includes rods in the box, a transmission element slidably mounted around the rods, a motor in the box and having a disk rotatably connected to a motor shaft, a driving rod eccentrically formed on top of the disk an... | 08/30/2005 |
| 6924913 | Multiple-resolution scanning device A multiple-resolution scanning device introduces an image information obtained by scanning a document into a light folding device and the image information is reflected in the light folding device. The image information comes out from the light folding device and re... | 08/02/2005 |
| 6600504 | Image forming apparatus having light beam adjusting mechanism An image forming apparatus has a photoreceptor having a image carrying surface, an exposing device to imagewise expose the image carrying surface to form a latent image, and a developing device to develop the latent image to form a toner image on the imag... | 07/29/2003 |
| 5940663 | Image exposure apparatus An error between a set value of magnification and an actual value of magnification is reduced by correcting the amounts of movement of a single-focus lens unit and a mirror in accordance with a production error in the focal length (in accordance with the ... | 08/17/1999 |
| 5926330 | Optical variable power module An optical variable power module has a movable lens unit slidably mounted on a chassis, such that the lens unit is moved along an optical axis defined thereby, and a movable mirror unit slidably mounted on the chassis, such that the mirror unit is moved a... | 07/20/1999 |
| 5847846 | Apparatus and method for scanning a bound color document using a wedge shaped platen A color scanner with a wedge shaped platen sequentially records opposing pages of a bound document positioned thereon using a single imaging station. The scanner includes a partially reflective mirror positioned between the wedge shaped platen. The two si... | 12/08/1998 |
| 5809381 | Image-forming apparatus and magnification correction method using the same An image-forming apparatus includes an image-forming unit for image-forming image information of an original on a record medium, an optical-path-length varying unit for varying a distance between an object and an image, a driving unit for driving the imag... | 09/15/1998 |
| 5752127 | Image forming apparatus provided with a movement control mechanism for optical system This invention relates to an image forming apparatus of electro-photography type in which a light image obtained by reflected light from an original document image by projecting light onto the original document image is changed in size at a set magnificat... | 05/12/1998 |
| 5581333 | Original image focusing apparatus having positionally adjustable focus lens The present invention provides an original image focusing apparatus having a lens for focusing image light from an original on the photosensitive member, a first guide member for guiding a movement of the lens, a carriage on which the lens and the first g... | 12/03/1996 |
| 5450175 | Image forming apparatus having optical means for image magnification change An image forming apparatus has an optical device for image magnification change. The apparatus is provided with a fixed platen on which a document is placed, four reflecting mirrors and an exposure lamp by which the document is exposed and scanned, and a ... | 09/12/1995 |
| 5337121 | Variable magnification copying apparatus A variable magnification copier apparatus includes an optical system which incorporates two pairs of moving mirror assemblies which are moved to maintain object and image conjugate requirements following magnification changes. Also included is a constant ... | 08/09/1994 |
| 5191376 | Optical unit An optical unit including a lens and a mirror unit installed within an image forming apparatus, the lens and mirror unit moving together according to a desired power of magnification so as to expose a photoconductor to the light reflected from the origina... | 03/02/1993 |
| 5146276 | Rotatable focusing means and variable magnification electrophotocopier A variable magnification electrophotographic copier wherein the ratio of object and image distances is changed by rotating a focusing device about an axis orthogonal to its optical axis. In a preferred embodiment, the focusing device is a refractive lens ... | 09/08/1992 |
| 4949126 | Optical reproduction apparatus and improved bellows therefor A bellows for use in an exposure station of an electrophotographic copier or other optical reproduction apparatus. In one embodiment the bellows is a dual bellows and has one section thereof coupled to a movable lens for changing the image reduction/magni... | 08/14/1990 |
| 4901113 | Image-forming device An image forming device having a mechanism for conducting variable magnification by moving a mirror, and lenses, which includes an optical system having six mirrors and a mechanism for moving the fourth mirror and the fifth mirror which are disposed behin... | 02/13/1990 |
| 4881102 | Copier with variable magnification ratio A copier capable of varying magnification ratio moves its optical system to a position determined by an inputted value of magnification ratio only after its print switch is operated to start a copying operation.... | 11/14/1989 |
| 4792828 | Image forming apparatus for forming a plurality of image from different originals on one transfer sheet An image forming apparatus capable of effecting plural image forming operations on one transfer sheet includes an image transfer device for transferring an image on the transfer sheet, an image magnification changing mechanism for changing the magnificati... | 12/20/1988 |
| 4792826 | Optical device for copying machine with inversion of principal point of optical system In a mirror scan type copying machine in which a light source and part of mirrors are movable, the optical system employs an asymmetrical lens construction for image formation. The optical system is mounted on an inverting drive mechansim for switching th... | 12/20/1988 |
| 4782361 | Imaging system with a plurality of document registration positions A document registration system is disclosed which enables documents of various sizes to be registered at different corner registration positions on a platen and to be projected onto a photoreceptor so that the projected images have one side aligned along ... | 11/01/1988 |
| 4768058 | Reproduction apparatus with everting bellows A bellows for use in an exposure station of an electrophotographic copier or other reproduction apparatus. The bellows has one end thereof coupled to a movable lens for changing the image reduction/magnification ratio of the station. The lens movement is ... | 08/30/1988 |
| 4669857 | Double dual rate precession scan system An electrophotographic printing system incorporates two sets of moving optical components, one on each side of a projection lens. A document on a platen is scanned by a first set of moving mirrors with the scanned image projected by a lens towards a photo... | 06/02/1987 |
| 4641951 | Method and apparatus for electrophotographically reproducing a desired portion of an original on copying paper A method and apparatus for reproducing a desired portion of letters and/or patterns in an original on a copying paper, wherein the system is computerized so as to obtain the necessary information from the data stored with respect to the distance component... | 02/10/1987 |
| 4614423 | Variable magnification copying apparatus An improved variable magnification copying apparatus which is provided with a function for controlling the lens position after completion of a copying operation so as to prevent occurrence of erroneous copying, with a consequent reduction of time required... | 09/30/1986 |
| 4607943 | Control circuit for an electrostatic copying apparatus An electrostatic copying process and apparatus capable of forming copies in at least two different ratios. The formation of a copied image involves exposure scanning of the image of an original document and projecting it on a photosensitive member through... | 08/26/1986 |
| 4582418 | Variable magnification electrostatic copying apparatus A variable magnification electrostatic copying apparatus includes a stationary transparent plate for placing thereon a document to be copied, an optical system including a first reflecting mirror assembly adapted to be moved reciprocally along the transpa... | 04/15/1986 |
| 4571064 | Optical element positioning apparatus for use in electrophotographic copying machine The invention is concerned with an apparatus for positioning optical elements of a lens for projecting an image of an original and a mirror for directing the image of the original from the lens toward a photosensitive medium. And the lens and mirror coope... | 02/18/1986 |
| 4552450 | Variable magnification apparatus with lens position control A copying apparatus having a lens position control device capable of setting the copying lens in plural positions for obtaining plural image magnification ratios. The lens position is determined by a control device in response to signals from a lens posit... | 11/12/1985 |
| 4538904 | Multiple magnification mode copying apparatus A multiple magnification mode copying apparatus includes a full and half rate scanning mirror system and a lens for forming an image of an object to be copied. The lens may be shifted along its optical axis to any one of a plurality of predetermined posit... | 09/03/1985 |
| 4533233 | Electrostatic copying apparatus A variable magnification electrostatic copying apparatus comprising a transparent plate on which to place a document to be copied, an optical system for projecting the image of the document onto an electrostatographic photosensitive member at any desired ... | 08/06/1985 |
| 4521100 | Variable magnification image forming apparatus Variable magnification copying apparatus wherein the optical element for forming an image of the original on a photosensitive member is displaceable for magnification change. The amount of displacement is controlled on the basis of the count of pulses gen... | 06/04/1985 |
| 4514080 | Apparatus for controlling optical system for copying machine A memory stores values representing distances from a predetermined reference position to positions corresponding to a plurality of selectable reduction/magnification factors. Upon the selection of a desired reduction/magnification factor, the current and ... | 04/30/1985 |
| 4498759 | Continuous variable magnification-type copying machine capable of enlarging and contracting an image A continuous, variable magnification-type copying machine which is capable of enlarging and contracting an image includes a full-speed mirror, a half-speed mirror system and a single lens. A scanning starting position of the full-speed mirror, the half-sp... | 02/12/1985 |
| 4457616 | Variable magnification optical apparatus A variable magnification optical apparatus for projecting an image at a first plane onto a second plane includes an optical system for forming an image of the first plane on the second plane, a first mirror disposed between the image-forming optical syste... | 07/03/1984 |
| 4441805 | Means for positioning optical components for a variable magnification/reduction copier optics system A continuously variable magnification/reduction scanning optical system for a document copier machine where the lens and total conjugate length adjustment are made prior to the copy operation without use of a special optics positioning motor. Optical comp... | 04/10/1984 |
