Abstract: In an image forming apparatus capable of reading a book document while turning over pages of the book, image data representative of two spread pages of a book document are stored in a frame memory. Among the image data, image data matching the front of a sheet are read out of the frame memory first and then output on the front of a fresh sheet. Then, an image is formed on the rear of a sheet refed from a duplex copy tray or refeed tray. Alternatively, an arrangement may be made such that, among two pages of image data, the image data read last are out of the frame memory first and then output on the front of a fresh sheet, and then an image is formed on the rear of a sheet refed from the refeed tray.

Abstract: In a book document reading device having a page turning capability, a scanning and page turning device scans a spread book document and turns over a leaf by receiving and then sending it out from a receiving section. The device is capable of surely detecting the edges of the book document.

Abstract: A book document handing device for an image forming apparatus, and having a function of reading a book document and a function of turning the pages of the document. A scanning unit having the two functions is moved in a reciprocating motion on and along the surface of a book document laid spread on a right and a left document tables, thereby reading the document while turning the pages thereof. A table unit has, in addition to the right and left tables, a mechanism for moving each table up and down independently of the other table, members for fixing the front and rear covers of the book document to the two tables, and slide rails supporting the table unit in such a manner as to be movable in the front-and-rear direction relative to the body of the device.

Abstract: In a book document reading device having a page turning capability, a turn belt has a flat portion at the underside thereof and is supported by a turn roller. The turn roller selectively moves the turn belt to a first position where the flat portion of the belt electrostatically attracts the uppermost leaf of a book document, which is spread on a table, in contact with the leaf, or to a second position where the belt is spaced apart from the book document while carrying the uppermost page therewith. When the turn belt is moved from the first position to the second position, a scanning unit is caused to stop moving. This allows the leaf of the document to surely adhere to the turn belt.

Abstract: In an image projector and an image forming apparatus for image projection, after a document has been laid on a glass platen, a voltage is applied from a power source to transparent electrodes respectively formed on the upper and lower surfaces of a combined polymer and liquid crystal film. As a scanner scans the document, the resulting reflection from the document scans the film. As a result, an image matching the document in tonality is formed in the film in the form of a transmittance distribution and in the original scale. After the document has been removed from the glass platen, a lamp included in an illumination unit is turned on to project the image held in the film onto a screen in an enlarged scale via mirrors and a lens which are included in a projection unit.

Abstract: A method for turning over a page of a book-type original using a belt as a device for turning over the page. The original is set with spread pages arranged upward. The method includes the steps of disposing the belt over spread pages of the original so that the belt comes in contact with a surface of the spread pages, attracting one of the spread pages of the original to the belt by an attracting devices, and deforming a part of the belt upward at a portion of the belt continuously along the surface of the spread pages while moving the portion from one end of the page to the other end thereof so that the page attracted to the belt is separated from a next page of the original.

Abstract: An image reader for reading a book document laid on a document table in a spread position by optically scanning the surface of the document. The edge of the document on the side where scanning for reading the document starts, the position of an image on the document, the size of the document, the edge of the document on the side where the leaf of the document begins to be turned over and so forth are detected on the basis of data derived from the optical scanning of the surface of the document.

Abstract: A finisher operable with an image forming apparatus for discharging paper sheets coming out of the apparatus and each carrying an image thereon to a plurality of bins while sorting the paper sheets and, if desired, packaging the paper sheets in an envelope. When a pack mode is selected, the size of paper sheets and the sizes of envelopes which are to be fed from a paper cassette or a tray each are sensed by size sensors. Envelopes sizes capable of accommodating the paper sheets of the sensed size are determined and compared with the sensed envelope sizes. Among the determined envelope sizes, the envelope size capable of accommodating the paper sheets of the size sensed by the size sensor in a desired number inputted. When the desired number is too great to be packaged in the envelope, such an occurrence is displayed and/or the pack mode is cancelled.

Abstract: A feeder of an image forming apparatus which includes a storing device for storing a stack of recording mediums and an endless belt to be used in the conveyance of a recording medium to an image forming section of the apparatus. A speed control device is provided for varying the speed of the endless belt driven by a driving device when a portion of the endless belt passes the storing device. Also provided are a plurality of pickup rollers which are disposed adjacent to the endless belt in correspondence with each respective storage device for moving the endless belt into engagement with a foremost recording medium in the storing device in order to convey the recording medium to the image forming section.

Abstract: A multistage paper feeding/conveying apparatus has a plurality of recording paper storing devices vertically arranged at multiple stages; a paper feeder for feeding a sheet of recording paper one by one from arbitrary one of the recording paper storing devices; and a vertical conveyer vertically extending and opposed to a paper feeding side of each of the recording paper storing devices. The vertical conveyer conveys the sheet of recording paper fed from the paper feeder to a paper receiving section of an image forming apparatus. The paper feeder has a single paper feeding unit which can selectively come in contact with a front end portion of an uppermost sheet of recording paper on an upper face thereof with respect to sheets of recording paper stored within the plural recording paper storing devices. The paper feeding unit and the vertical conveyer have a single endless conveying belt and a device for forming an electric charge pattern for adsorbing the sheet of recording paper to the endless belt.

Abstract: An illuminating device incorporated in a copier for illuminating the entire image surface of a document laid on a glass platen by a plurality of flash lamps. The voltages to be applied to the flash lamps and, therefore, the quantities of light to issue from the lamps, are controlled to illuminate the image surface of a document in a uniform illuminance distribution. Even when use is made of a document having a fraction of another document adhered thereto, shadows ascribable to the edges of the fraction or patch do not appear.

Abstract: An improper weft removing device for an air jet loom is capable of precisely measuring the length of the improper weft and judging whether the whole of the improper weft has been discharged or a cut piece of the improper weft is left in the open shed of the warps at the time of discharging the improper weft. The device includes a sensor for detecting the passage of the improper weft, a controller for measuring the length of the improper weft according to a signal outputted from the sensor, a nozzle for blowing pressurized air against the end portion of the improper weft thereby controlling the running attitude of the end portion of the improper weft, and a discharge nozzle for delivering the improper weft on an air stream to a discharge dust box, wherein the blowing pressure of the discharge nozzle can be controlled.

Abstract: An illuminating device for use with an imagewise exposing arrangement of an electrophotographic copier, electrostatic printer or similar image recording equipment. A delimited area of a glass platen is illuminated by a light source and a main reflector which is implemented by a mirror. The main reflector is located outside of one end of the delimited area. Three auxiliary reflectors are individually associated with, among four sides which are individually associated with the outer edges of the delimited area, a side facing the one end where the main reflector is provided and two facing sides which adjoin the above-mentioned side. Light reflected by the main reflector is redirected by the auxiliary reflectors toward the delimited area.

Abstract: A wire cleaning device has a cleaner movable for cleaning a charging wire in a corona discharger, and a motor for moving the cleaner. Whether or not the cleaner is locked somewhat in its stroke of movement is determined by signals from a position detector and a movement failure detector, or signals from an overcurrent detector and a timer. Alternatively, the cleaner which is locked in its moving stroke is forcibly moved by a larger amount of energy than normal, or is vibrated, on the basis of signals from a home position sensor and a failure detector.