摘要:
An image forming apparatus for forming a developed image includes a developing device for developing an image on an image bearing member, a passage along which the developing device is movable continuously between an inside position where the developing device is inside the apparatus and an outside position where the developing device is at least partly outside the apparatus, a driver for automatically moving the developing device along the passage and one or more pressing members for pressing the developing device toward the image bearing member. The driver includes a driving source and transmission which are operative to move the developing device in response to the opening of a cover which covers an inlet to the passage.
摘要:
An automatic original feeding apparatus has a coordinates position detecting device provided with a supporting table for supporting thereon a sheet original of which the area during image formation is to be designated, a conveying device for directing the inserted sheet original to a predetermined position, and a feed device provided upstream of the conveying device and responsive to the termination of the area designation to change over to a feeding position and feed the sheet original on the supporting table to the conveying device.
摘要:
An image forming apparatus includes an image bearing member, image forming station for forming a latent image on the image bearing member, a conveying passage extending toward the image bearing member to guide a developing device, a first moving mechanism for engaging with the developing device in the conveying passage and moving it in a substantially horizontal plane, wherein the image bearing member, the latent image forming station, the conveying passage and the first moving mechanism are provided in a main body of the image forming apparatus, a device for accommodating a plurality of developing devices. The accommodating device is mounted to the main body, the accommodating device includes, a second moving mechanism for moving the developing device opposed to the conveying passage into the conveying passage in a substantially horizontal plane and an accommodating case having partition stages arranged substantially vertically for accommodating plural developing devices and movable together with the developing devices accommodated therein, and a driver for transmitting a driving force selectively to the first driving mechanism, the second driving mechanism and the accommodating case.
摘要:
An image forming apparatus includes accommodating assembly for accommodating a plurality of developing devices on stages arranged substantially vertically and having first driving mechanism for moving the developing devices in a substantially horizontal plane, an image formation assembly for receiving selected one of the developing devices moved out of the accommodating assembly and for further moving it in a substantially horizontal plane, the image formation assembly including systems for forming images using the developing device, the accommodating assembly further including an opening for allowing a the developing device to be loaded into the accommodating assembly.
摘要:
A multi-color image forming apparatus, for forming a superimposed multi-color image on a transfer material, includes: a latent image bearing member; device for forming a latent image on the image bearing member; plural developing devices containing different color developers for developing the latent image in different colors; device for accommodating the plural developing devices; guiding device for guiding the developing device between a first position within the accommodating device and a second position adjacent the image bearing member; driving device for moving the developing device between the first position and the second position for exchanging the developing device at the second position; device for discriminating the plural developing devices; and a second developing device disposed adjacent the image bearing member at a different position; wherein when plural colors are selected for development; a discrimination is made as to whether the developing device containing the developer of the selected color is at the first position or not, and if so, the developing device located at the first position is operated before the other of the plural developing devices, irrespective of the order of the selection.
摘要:
An image forming apparatus includes sheet accommodating cassette for accommodating sheets, a device for forming images on the sheets, a first sheet conveying passage for conveying the sheet to the image forming device from the sheet accommodating cassette, a conveyor for accommodating a bundle of sheets having been subjected to an image forming operation by the image forming means at first sides thereof in a form in which leading edges of the sheets are gradually deviated in a sheet advancement direction, and for conveying the bundle as a whole, a feeder, disposed downstream of the conveyor with respect to the sheet advancement direction, for feeding one by one the sheets of the bundle from the sheet closest to the feeder, a second sheet conveying passage merging into the first passage for refeeding to the image forming device the sheets fed by the feeder, and a confining device for confining the sheets of the bundle other than the sheet being fed by the feeder.
摘要:
An image forming apparatus such as a copying apparatus and a laser beam printer, is capable of forming a superimposed image or duplex image on one sheet. The sheet which has been once subjected to the image forming operation and which is going to be subjected to another image forming operation is reintroduced into the image forming station selectively through a flow-through sheet passage or through an intermediate tray on which the transfer sheets are once stacked. A displaceable flapper is provided to direct the sheet selectively to the flow-through passage or to the intermediate tray.
摘要:
An image forming apparatus includes an image forming station for conveying a sheet material along a lateral reference position and for forming an image on the sheet material; refeeding device for refeeding to the image forming station the sheet material on which the image has been formed in the image forming station; means, provided in the sheet refeeding means, for shifting the sheet material in the lateral direction from the lateral reference position by a predetermined amount, wherein the amount of the shift is predetermined on the basis of a change in a lateral dimension of the sheet material resulting from an image forming operation in the image station.
摘要:
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 magnification of the image to be transferred onto the transfer sheet, and a control device for controlling the magnification changing mechanism in accordance with deformation of the transfer sheet caused by an image forming operation on the transfer sheet, after a first image is formed on the transfer sheet and before a second image is formed on the same transfer sheet, whereby those images are correctly registered.
摘要:
An image forming apparatus includes an image forming station for forming an image on a sheet; a rotatable member for transferring the sheet in a first direction toward the image forming station; supporting device for supporting the rotatable member for displacement in a second direction which crosses the first direction; driving device for displacing the rotatable member in the second direction to correct deviation of the sheet in the second direction; and inlet guide for guiding the sheet to the rotatable member, the guide being displaceable in the second direction together with the rotatable member.