Abstract: Disclosed is an image forming apparatus having the following arrangement. When a first linking member pivotally moves to the original position, an engaging portion juttingly formed from the first linking member engages a first positioning portion formed in a frame, while a second roller coming into contact with a first roller rotatably supported to the frame. A second linking member is pivotally rotated in response to the pivotal rotation of the first linking member, and part of a transfer unit engages a second positioning portion formed in the frame to position the transfer unit relative to a photosensitive drum. In association with the pivotal rotation of the second linking member, a guide portion of the second linking member engages part of a fixing unit to position the guide portion relative to the fixing unit.

Abstract: An image forming apparatus is provided with a document feeder for feeding a document to an image scanning portion for scanning an image of the document, a document jam detector for detecting a jam of the document in the document feeder, and a controller for, when the document jam detector detects the jam of the document, stopping an entire image forming operation after completing a specified operation. Since the specified operation is completed upon detection of the document jam, the document to be copied when the image forming operation is resumed after removal of the jammed document can be clearly distinguished from the other. The image forming apparatus can be more rapidly resumed.

Abstract: In a sheet handling machine having a frame, and a cut sheet handling system including a sheet path, a stalled sheet pulling and crushing apparatus for reducing a sheet, stalled across an interface between a withdrawable and a fixed component of a cut sheet handling system into a shape and size suitably enabling reliable removal of the stalled sheet through a relatively narrow gap between the withdrawable and fixed components of the sheet handling system.

Abstract: A recording apparatus is comprised of recording means for recording record information on a sheet, a conveyance path for guiding the sheet to the recording means, and an opening formed in the body of the apparatus accessing the conveyance path to enable the sheet that is stopped in the course of the conveyance path to be pulled out.

Abstract: In a color image forming apparatus, plural different colored toner images are sequentially formed on an image forming body by repeating respective operations of plural chargers, plural imagewise exposure devices and plural developing devices so that a superimposed color image is formed on the image forming body. The color image forming apparatus further includes a detector provided inside and facing the image forming body, downstream of a developing device located in a most downstream position among the plural developing devices, for detecting the superimposed color image on the image forming body.

Abstract: A broad swing arm having a finger at its swinging end extends from an axis near a fixing unit to a tractor, overtop and next to a continuous form transport path. Any bulge or buckle caused by a paper jam and forming in the continuous form at any position between the fixing unit and tractor, and across the width of the form, is detected as the swing arm is pushed up at some point along its length, moving the finger away from a sensor monitored by a controller. Printing in the printer is stopped when the sensor detects that the finger has been moved.

Abstract: A jam detecting device according to the present invention quickly outputs a jam detection signal when a part of a sheet is insufficiently conveyed during conveyance. A discharge detecting switch 55 is provided in the vicinity of discharge rollers 36. In addition, a plurality of (for example, three) pulse output units 230, 231 and 232 are provided in relation to the discharge detecting switch 55. Each of the pulse output units 230, 231 and 232 is so constructed as to output a pulse as the sheet is moved. In a jam judging circuit 235, when a signal of the discharge detecting switch 55 is on, a jam signal is outputted on the basis of the fact that no pulses are applied for not less than a predetermined time period from at least one of the pulse output units 230, 231 and 232. When a Jam occurs, therefore, the jam can be quickly detected.

Abstract: A copying machine control system according to the present invention is a copying machine control system including data terminals collecting data related to copying machines, and a centralized control unit performing communication of data with the terminals through a communication network. Each terminal includes a holding device for holding an identification code for initialization and a first transmitter for transmitting an identification code to the centralized control unit when the centralized control unit is connected to a copying machine. The centralized control unit includes a memory for storing the identification code held in the data terminal, a confirming device for confirming a data terminal on the basis of the identification code and a second transmitter for transmitting the data for initialization to the confirmed data terminal, and the data terminal further includes an initialization device.

Abstract: An image forming apparatus capable of simplifying work for removing a sheet by a user after a jam occurs. An image is formed on a sheet having a predetermined length cut from a rolled-sheet. A cutting mechanism is provided in a halfway portion of a conveying path through which the sheet passes. When a jam occurs in the conveying path, the cutting mechanism is operated, whereby the sheet is cut. The sheet in the apparatus can be immediately removed, therefore.

Abstract: A digital copying apparatus having an image data memory and an automatic document feeder (ADF). The digital copying apparatus reads an image of an original document placed on a document platen and generates image data to be stored in the memory. When a copy sheet jam occurs during operation of an image forming section, it is determined whether or not the uncopied image data which have been generated but have not yet been copied are stored in the memory based on the detection of discharge of copy sheets from the apparatus. When all uncopied image data are stored in the memory, the copy operation is restarted using the image data stored in the memory. When all uncopied image data are not stored in the memory, the original document is discharged from a document transport path of the ADF to a discharge tray and the number of original documents to be returned to a feed tray is displayed on a display.

Abstract: An image forming device capable of detecting that a paper jam has occurred in a paper path thereof during a priming operation of the device, and when the paper jam has occurred, sets a time period for the user to manually eliminate the paper jam or eliminate the paper jam through an automatic process. Once the time period has elapsed and the paper jam has not been removed, an engine part of the device is automatically driven to rotate various rollers therein in an attempt to automatically deliver the jammed paper to an exterior of the device.

Abstract: An image forming apparatus has a jam sensor for detecting a jammed sheets in a transporting path, a paper guide which can be switched between a close state that guides sheets to an image forming section and an open state that make a jammed sheet removable, a movable backward end plate which is provided on an ADU tray and regulates a position of stored sheets according to the size of sheet, and a pulse motor that moves the movable backward end plate. When the paper guide is converted to the open state, an interference section where the movable backward end plate contacts with the paper guide and a non-interference section are formed. The image forming apparatus is provided with a CPU which drives the pulse motor so as to move the movable backward end plate to the non-interference section based upon a jam detecting signal from the jam sensor.

Abstract: An image forming apparatus comprising: an image recording unit including image carriers on which toner images are respectively formed, a paper carrier which conveys paper fed to a paper drawing-in position while drawing therein, and transfer units which transfer respective toner images on the image carriers onto the paper on the paper carrier at predetermined image transfer positions of the image carriers; paper jam detecting means for detecting a paper jam occurring when the paper drawn in by the paper carrier adheres to the surfaces of the image carriers; conveyor rollers disposed in a paper feeding unit which feeds the paper to a paper drawing-in position in the image recording unit at a predetermined timing; an inlet chute including an upper paper guide and a lower paper guide for guiding the paper fed from the conveyor rollers toward the paper drawing-in position; conveyor roller rotation control means which suspend the rotation of the conveyor rollers until the paper stretched between the image recordin

Abstract: An image forming apparatus of the invention includes: a sheet-type determining device which determines whether the fed sheet is of plain paper or of OHP film; a first timer which sets up the arrival timing of the sheet for the high-speed mode; a second timer which sets up the arrival timing of the sheet for the low-speed mode; a selecting device which selects the first timer when the type of the sheet determined by the sheet-type determining device is plain paper and selects the second timer in the case of OHP film; and a warning device which, if in either of the modes, the sheet does not reach a predetermined site within the predetermined arrival time, determines that the sheet has jammed and informs the user of the point of jamming.

Abstract: An apparatus for detecting a transfer medium (i.e., paper) accordion jam in a processing path of a laser printer comprises an accordion detection flag pivotally disposed near the processing path. In the event an accordion jam occurs to the transfer medium in the processing path, an accordioned portion of the transfer medium presses against the flag thereby forcing the flag to pivot for signaling the accordion jam.

Abstract: An operation guidance display apparatus displays dynamic images of operations which are necessary for a display section provided to an image forming apparatus in the case where jam, out of toner, etc. occur in sheet passing sections of the image forming apparatus, and an operation by an operator is required. As a result, even if the operator first performs the necessary operations or it is difficult for the operator to understand the operations, the operator can safely and securely performs the operations. Therefore, operability of the image forming apparatus can be improved by providing the apparatus of the present invention to the image forming apparatus.