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Actor Marlon Brando has four patents, all named "Drumhead tensioning device and method."
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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 |
| 7161717 | Self-propelled image read module The present invention provides a self-propelled image read module, which comprises a sensor, a guide rod, a motor, a gear set, and a belt. The guide rod is fixed on a base of a scanner. The sensor is slidably matched on the guide rod. The motor is disposed at one si... | 01/09/2007 |
| 7082278 | Variable magnification reflecting mirror apparatus An original reading apparatus can realize stepwise or sequential variable magnification using relatively small size optical system upon reading an original. The apparatus includes a first mirror arranged in an optical path from a reading position of an original to a... | 07/25/2006 |
| 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 |
| 6552835 | Reflective and penetrative scanning apparatus A Reflective and Penetrative Scanning Apparatus has a body, a first ambulatory reflection module, a second ambulatory reflection module, a lens assembly, an image shooting unit and an adjustment means. The body incorporates a Reflective Script Platform an... | 04/22/2003 |
| 6421158 | Optical scanning module with rotatable reflection mirror for image scanning device An image scanning device with a rotatable reflection mirror arranged in an optical scanning module thereof for establishing either a reflective or transparent scanning optical path is disclosed. The optical scanning module includes a first focusing lens, ... | 07/16/2002 |
| 6081363 | Optical length adjusting device An optical length adjusting device provides different optical length for different lenses in a multi-resolution scanner. The optical length adjusting device includes a focus module for focusing the optical image on an image sensor, a first light reflectin... | 06/27/2000 |
| 6055005 | Color printer with jitter signature matching Correcting color banding problems resulting from facet-to-facet jitter in a color imaging device having a multifaceted polygon are corrected by starting each color separation using the same facet. This facet synchronization has been shown to reduce the ob... | 04/25/2000 |
| 5913091 | Image reading apparatus An image reading apparatus includes one or more sliders which carry optical parts and can linearly reciprocate in a predetermined direction. The apparatus optically scans and thereby reads an image on an original document located at a predetermined positi... | 06/15/1999 |
| 5878311 | Optical module An optical module is intended to be assembled in an optical apparatus, and includes a chassis member having an opening therein. A mirror unit is provided in the opening of the chassis member, such that a lower part of the mirror unit protrudes from a lowe... | 03/02/1999 |
| 5842083 | Electrostatic copying machine An electrostatic copying machine made up of an image-forming unit including a rotary drum having an exposure zone and a transfer zone, an optical system for projecting the image of the document to be copied onto the exposure zone, a copying paper-feeding ... | 11/24/1998 |
| 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 |
| 5640263 | Optical scanner for an image forming apparatus In an optical scanner having a plurality of mirrors for scanning a document, a planeness reinforcing member having a predetermined degree of planeness is fitted on major ones of the mirrors. The reinforcing member successfully reduces the vibration of the... | 06/17/1997 |
| 5493368 | Image forming apparatus that copies both two-dimensional images faced downward and three-dimensional objects faced upward An image forming apparatus for producing a copy image by scanning and exposing an image, including a three-dimensional object onto a photosensitive surface, of a photosensitive material. The apparatus includes an original placing table on which an origina... | 02/20/1996 |
| 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 |
| 5072255 | Optically variable magnification mechanism An optically variable magnification mechanism that comprises a motor which rotates in one direction. A rotary cam is arranged so as to be rotated in one direction by the motor and has cam surfaces assigned on a periphery thereof corresponding to a plurali... | 12/10/1991 |
| 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 |
| 4812917 | Device for reducing document in size having two facing non-parallel mirrors A device for reading in a reduced scale a relatively wide document, e.g., a display board of a graphic input device by projecting an image of the document onto a photoelectric transducer through an image-forming lens. A pair of flat mirrors are provided w... | 03/14/1989 |
| 4811047 | Image forming apparatus with means for recognizing an original condition A copying machine has exposure lamps for scanning an original, line sensors for recognizing an original pattern, an imaging lens, a blank exposure lamp to eliminate a black frame and a central black stripe of a reproduced image if the original is thick (i... | 03/07/1989 |
| 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 |
| 4666287 | Document copiers An attachment for converting a moving platen copier into a fixed platen copier, wherein at least part of the moving platen is replaced by a housing (26) having a window scanned by a scanner unit (30) from which strip images, reflected from a document to b... | 05/19/1987 |
| 4647178 | Unit-type copying machine A unit-type copying machine comprising an upper unit having an optical system for exposing a document to light by scanning, and a lower unit provided independently of the upper unit and having a photoconductive drum to be exposed to an image of the docume... | 03/03/1987 |
| 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 |
| 4639121 | Document registration system The present invention is directed towards an optical scanning system for an electrophotograhic printing machine wherein a lens control system is provided to enable lens movement independent of lens movement which occurs during magnification changes. The l... | 01/27/1987 |
| 4627708 | Photocopying apparatus A photocopying apparatus is provided in which a moving area of a lens at the time of a magnification changing and that of an optical device such as a mirror unit overlap partly. At the time of the magnification changing, it is determined whether the optic... | 12/09/1986 |
| 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 |
| 4571065 | Scale factor changing mechanism for copying machine A copying machine with an optical system in which three mirrors are arranged between the surface of an original and a lens and one mirror is arranged between the lens and a photosensitive member. A scale factor changing mechanism utilizes one movable mirr... | 02/18/1986 |
| 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 |
| 4519697 | Image forming apparatus An image forming apparatus has a reciprocatingly movable member for forming an image on a record medium. The reciprocatingly movable member is moved and set to a predetermined home position before a first image is formed. A sensor is associated with the m... | 05/28/1985 |
| 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 |
| 4472048 | Slit exposure optical system in electrophotographic copying machine An optical system for directing a light image of a scanned original to a charged photosensitive surface of an electrophotographic copying apparatus, includes an imaging lens located between the original and the photosensitive surface. The optical axis of ... | 09/18/1984 |
| 4453824 | Variable magnification copying apparatus A variable magnification copying apparatus capable of not only one-to-one magnification copying but also reduction copying, and particularly a variable magnification copying apparatus of the slit exposure scanning type which is capable of two or more type... | 06/12/1984 |
| 4436416 | Mirror scanning control mechanism in variable magnification type copying machine The scanning speed and distance of a full-speed mirror are continuously variable in accordance with the copying sheet size, magnification factor and original size.... | 03/13/1984 |
| 4435077 | Optical magnification enlargement type copying machine A magnification enlargement type copying machine in which the image of a picture on a film is projected onto a screen or a photo-sensitive drum by an image enlarging lens to be observed and copied. The size of a picture on a film to be copied and a size o... | 03/06/1984 |
| 4374619 | Variable magnification copying apparatus An optical system is provided for a copying apparatus which includes a plurality of components whose displacements relative to each other can be made to yield differing magnification at an imaging plane. In particular, during a magnification mode a dual r... | 02/22/1983 |
