Canon Kabushiki Kaisha

Hiroyuki Hattori

Kazumi Umezawa

Shigehiro Komori

Hisashi Sakamaki

Koichi Miyamoto

Toshihide Iida

Hiroshi Ogawa

Hirotoshi Kishi

Seiji Sagara

Katsuichi Shimizu

Masao Ariga

Takahiko Amanuma

Kenji Kurita

Yoshitomo Goshima

Shiro Komaba

Tsuneki Inuzuka

Tetsuji Tachika

Yoshiki Furukawa

A document scanning apparatus includes a first scanner for reciprocating an optical member and for exposing an original document put on a document platen, and a second scanner for feeding an original document to an exposure position and for exposing the original document at the exposure position. A selector selects either the first scanner in a stationary exposure mode or the second scanner in a dynamic exposure mode. In the stationary exposure mode, a controller causes forward movement of the reciprocating optical member to stop and the reciprocating member to move backward in accordance with a detection signal signifying that the trailing edge of a recording sheet has passed a predetermined position in the transport path for the recording sheet. In the dynamic exposure mode, the controller controls the second scanner to feed successive original documents in accordance with the same detection signal for the trailing edge of the recording sheet.

Image forming apparatus having stationary exposure mode and dynamic

An image processing apparatus provided with a plurality of operation devices for recording or reproducing an image. Using operation control signals, a controller controls the operation devices in accordance with selected information signals. Appropriate ones of the information signals are selected in accordance with the control signals.

Image forming apparatus having streamlined input for control signals

An image forming apparatus capable of feeding or transporting recording medium of different sizes through the image forming path. A discriminating device determines whether or not a recording medium has reached a predetermined position in the transport path and a detecting member detects the recording medium a predetermined time thereafter to identify the size of the recording medium. If the recording medium is detected within the predetermined time, it is identified as being of a particular size. When the medium is detected during a time period different from the predetermined time period, the medium is identified as being of a size smaller than the particular size. The image formation operation is controlled as a function of the size identification of the recording medium.

Image forming apparatus

Apparatus including a first memory for temporarily storing numeric data entered by a numeral key, and a second memory for thereafter storing the numeric data which is transferred thereto from the first memory responsive to operation of a storage control key. Further, there is provided a display for displaying a numeral based on the numeric data stored in the first memory. This apparatus makes it possible for an operator to monitor the numeric data which is temporarily stored in the first memory prior to its storage in the second memory, to prevent erroneous data from being stored in the second memory.

Copying apparatus

A copying apparatus has a device for transporting copy material along a path, a device for detecting copy material along the path, first and second modes in which first and second timing signals are produced, respectively, and a jam detector, responsive to the absence of a detection by the detection device prior to the first or second timing signal, for producing an output.

Electrophotographic device

A copying apparatus has an input unit for entering plural copy mode data into the copying apparatus, a memory for storing the data, and a control circuit for reading out copy mode signals in succession according to the data stored in the memory. The control circuit reads out the copy mode signals upon completion of copying on a predetermined number of copying sheets, and then controls a subsequent copying operation in accordance with the copy mode signals.

In a copying device for forming a latent image on a rotatable image bearing member, such member has a portion which is not used for image formation. The latent image is developed into a toner image on the rotatable member, and a cleaning device is provided for cleaning the rotatable member to permit its reuse. An improvement is provided wherein a device detects the rotational disposition of the image bearing member, and positions the portion of such member which is not used for image formation in alignment with the cleaning device when the rotatable member is stopped.

Image forming apparatus with cleaning means

A copying apparatus has an original document base which reciprocates along a scanning path for slit exposure of an original. The image of the original is formed on a photosensitive drum and is then transferred onto a copy sheet. Copy sheets are fed in response to a switch which is provided along the scanning path and is actuated by movement of the original document base in the scanning direction. Another switch is provided to prevent feeding of a copy sheet during movement of the base in the opposite direction.

A copying apparatus has a rotatable medium, processing apparatus including a charger for forming an image of an original on the rotatable medium and for transferring the image to a transfer material, a residual charge remover, a copy setting mechanism and a start switch. The rotatable medium is rotated during the copying operation with both the charger and residual charge remover operating and is post rotated after the copying operation with the charger disabled but the residual charge remover operating. When the start switch is operated during the post-rotation but before the charger becomes disabled, the charger remains operative and copying is restarted.

An image forming device has a photosensitive member upon which a latent image is formed and then developed into a visible image and device for heating said photosensitive member.

Copying apparatus with a heated photosensitive drum

An image forming apparatus including image forming device, for forming an image on a recording member, having a scanner for scanning the recording member, an input device for selecting and instructing the function mode of the scanner, and a controller having a plurality of stored programs corresponding to the scanning modes for controlling the function of the image forming device, the controller being adapted to select a stored program in response to the input device and controlling the function of the image forming device in accordance with the program of the selected scanning mode.

A copying apparatus has an input unit for entering plural copy mode data into the copying apparatus, memory for storing the data, and a control circuit for reading out copy mode signals in succession according to the data stored in the memory, upon completion of copying on a predetermined number of copying sheets, and for performing the copying operation in accordance with the copy mode signals.

In a copying device for selectively copying sheet originals and thicker originals, the thicker originals being copied while positioned on a reciprocating original carriage. In one mode of copying thick originals, the original carriage is reciprocated one time for each rotation of the photosensitive drum while in another mode each reciprocation corresponds to two rotations of the drum. In one mode of copying sheet originals the photosensitive drum rotates once for each copy while in another mode a plurality of copies are formed for each rotation. The copying device has a control system for detecting the position of the reciprocating carriage and for controlling the forward and reverse movement of the carriage as a function of the size of the original being copied as well as the position of the carriage.

Copying apparatus for sheet originals and thicker originals

There is disclosed an electrophotographic method and device for forming copies utilizing a reciprocating member movable for scanning an original document positioned thereon to form a latent image on a rotatable photosensitive medium. Transfer material is fed in response to a feed signal produced by the reciprocating member in accordance with movement thereof. In one mode of operation, the photosensitive medium completes at least two rotations for each reciprocation of the reciprocating member.

A control device for driver member comprises an intermittently movable driver member, a follower member adapted to follow the driver member for displacement, retention and return displacement, a control member for controlling the starting and stoppage of the movement of the driver member, and a first and a second signal for starting the movement of the driver member. The movement of the driver member may be started by the first signal to displace the follower member to bring about the retaining position, whereafter the movement of the driver member may be automatically stopped by the control member, and the movement of the driver member may be restarted by the second signal and at the position whereat the return displacement of the follower member is completed, the movement of the driver member may be automatically stopped by the control member.

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Mitaka, Japan

Hiroyuki Hattori