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Class Information
Number: 399/228
Name: Electrophotography > Image formation > Development > Plural diverse (e.g., color) > Selectively active
Description: Subject matter wherein an arrangement is provided for activating an applicator from a plurality of applicators that are all in developing positions for applying colored developer material.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7606517 |
Image forming apparatus having a power controlling device that controls power supplied to developers |
Oct. 20, 2009 |
| 7590372 |
Multi-pass type color image forming apparatus |
Sep. 15, 2009 |
| 7555245 |
Image forming apparatus with cam members |
Jun. 30, 2009 |
| 7536136 |
Image forming apparatus and image forming method |
May. 19, 2009 |
| 7469118 |
Image forming apparatus with position changing developing devices |
Dec. 23, 2008 |
| 7450888 |
Image forming apparatus and method of detecting home position error by sensing an indicating unit |
Nov. 11, 2008 |
| 7444103 |
Image-forming device and developing unit used therein |
Oct. 28, 2008 |
| 7428396 |
Power transmitting device for developing device and image forming apparatus with the same |
Sep. 23, 2008 |
| 7395014 |
Image forming apparatus |
Jul. 1, 2008 |
| 7376373 |
Image forming apparatus having a power transmitting device to selectively operate developing units thereof |
May. 20, 2008 |
| 7315714 |
Image forming apparatus including a controller for controlling a moving speed of a moving member holding a plurality of developing devices |
Jan. 1, 2008 |
| 7308221 |
High developing voltage supply apparatus |
Dec. 11, 2007 |
| 7302201 |
Voltage switch and electrophotographic color image forming apparatus using the same |
Nov. 27, 2007 |
| 7177573 |
Image forming apparatus with reversely rotated developer bearing members |
Feb. 13, 2007 |
| 7177575 |
Image forming apparatus |
Feb. 13, 2007 |
| 7158740 |
Image forming apparatus |
Jan. 2, 2007 |
| 7135260 |
Imaging system |
Nov. 14, 2006 |
| 7068956 |
Image forming apparatus and control method for the image forming apparatus |
Jun. 27, 2006 |
| 7068966 |
Image forming apparatus operable in two image formation modes using either one developing device or a plurality of developing devices |
Jun. 27, 2006 |
| 7020409 |
Apparatus for supplying voltage to developing device |
Mar. 28, 2006 |
| 6970671 |
Image forming apparatus |
Nov. 29, 2005 |
| 6947689 |
Image forming apparatus |
Sep. 20, 2005 |
| 6889025 |
Color image forming apparatus having developers in a fixed position with respect to a photosensitive medium |
May. 3, 2005 |
| 6850723 |
Contact shock dampening and development nip forming apparatus for developers |
Feb. 1, 2005 |
| 6839535 |
Developing apparatus |
Jan. 4, 2005 |
| 6836630 |
Reduction of wear on selected components in multi-color imaging apparatus |
Dec. 28, 2004 |
| 6807394 |
Apparatus for connecting and disconnecting developing bias power supply |
Oct. 19, 2004 |
| 6795671 |
Image forming apparatus featuring switchable, contact and spaced, clutch-operated developing units |
Sep. 21, 2004 |
| 6778798 |
Rotating force transmitting apparatus and image forming apparatus equipped with the same |
Aug. 17, 2004 |
| 6768891 |
Belt device and unit device including belt device and image forming apparatus using the belt device and unit device |
Jul. 27, 2004 |
| 6763213 |
Apparatus for forming color image using electrophotography |
Jul. 13, 2004 |
| 6718151 |
Image formation apparatus and method of alternating developing units |
Apr. 6, 2004 |
| 6704530 |
Method for forming image in electrophotographic printer |
Mar. 9, 2004 |
| 6694117 |
Color photographic apparatus |
Feb. 17, 2004 |
| 6694118 |
Developing apparatus of electrophotographic printer |
Feb. 17, 2004 |
| 6681088 |
Process cartridge, image forming apparatus and separating mechanism for separating developing member from photosensitive drum |
Jan. 20, 2004 |
| 6647233 |
Image forming apparatus |
Nov. 11, 2003 |
| 6600889 |
Image forming apparatus having rotational control of selectively active development rollers |
Jul. 29, 2003 |
| 6546218 |
Image forming apparatus |
Apr. 8, 2003 |
| 6535708 |
Developing device with a contact-enabling mechanism |
Mar. 18, 2003 |
| 6519434 |
Image forming apparatus |
Feb. 11, 2003 |
| 6327449 |
Electrophotographic apparatus for forming color image |
Dec. 4, 2001 |
| 6292641 |
Image forming apparatus selectively operating one of a plurality of developing units and a method for controlling a switching operation for the developing units |
Sep. 18, 2001 |
| 6263178 |
Method of applying a bias voltage for image development and method of switching the bias voltage in an image forming apparatus |
Jul. 17, 2001 |
| 6181902 |
Method for operating an electrographic printer or copier for printing different colors with at least two developing units |
Jan. 30, 2001 |
| 6157794 |
System to reduce mixing of toner and magnetic carrier |
Dec. 5, 2000 |
| 6101354 |
Electrophotographic image forming apparatus to which a process cartridge is detachably mountable and such a process cartridge whose developing member is supported at a position which deviates |
Aug. 8, 2000 |
| 6081683 |
Color electrophotographic apparatus with obliquely arranged photosensitive belt |
Jun. 27, 2000 |
| 6047149 |
Image forming apparatus having a rotatable first developing member, and a fixed second developing member having a housing partially covering the first developing member |
Apr. 4, 2000 |
| 5999777 |
Image forming apparatus capable of temporarily breaking the contact between the developer and the photosensitive drum with use of electric field |
Dec. 7, 1999 |
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