EP0033594B1 - Machine à copier - Google Patents

Machine à copier Download PDF

Info

Publication number
EP0033594B1
EP0033594B1 EP81300159A EP81300159A EP0033594B1 EP 0033594 B1 EP0033594 B1 EP 0033594B1 EP 81300159 A EP81300159 A EP 81300159A EP 81300159 A EP81300159 A EP 81300159A EP 0033594 B1 EP0033594 B1 EP 0033594B1
Authority
EP
European Patent Office
Prior art keywords
photoreceptor
image
images
developed
read
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81300159A
Other languages
German (de)
English (en)
Other versions
EP0033594A2 (fr
EP0033594A3 (en
Inventor
Christopher Snelling
Charles J. Kramer
David B. Kay
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xerox Corp
Original Assignee
Xerox Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US06/111,519 external-priority patent/US4294534A/en
Priority claimed from US06/111,520 external-priority patent/US4345835A/en
Application filed by Xerox Corp filed Critical Xerox Corp
Publication of EP0033594A2 publication Critical patent/EP0033594A2/fr
Publication of EP0033594A3 publication Critical patent/EP0033594A3/en
Application granted granted Critical
Publication of EP0033594B1 publication Critical patent/EP0033594B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/221—Machines other than electrographic copiers, e.g. electrophotographic cameras, electrostatic typewriters
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/04036—Details of illuminating systems, e.g. lamps, reflectors
    • G03G15/04045—Details of illuminating systems, e.g. lamps, reflectors for exposing image information provided otherwise than by directly projecting the original image onto the photoconductive recording material, e.g. digital copiers
    • G03G15/04072—Details of illuminating systems, e.g. lamps, reflectors for exposing image information provided otherwise than by directly projecting the original image onto the photoconductive recording material, e.g. digital copiers by laser

Definitions

  • This invention relates to a copying apparatus having a photoreceptor, means to charge said photoreceptor in preparation for imaging, exposure means for exposing the charged receptor to produce latent electrostatic images, developing means for developing the images, and transfer means for transferring the developed images to copy substrate material.
  • the apparatus is of the kind which comprises image write/read means which includes means to produce a high intensity beam of electromagnetic radiation; means to focus said beam to a location on said photoreceptor; and scanning means astride the path of said beam for scaning said beam across said photoreceptor; said write means including means for modulating said beam in accordance with said image signals to produce said latent electrostatic images when the write/read means is operated in the write mode; and said read means including means to provide electrical signals representative of an image to be transmitted to a remote location when the write/read means is operated in the read mode.
  • Scanning of an original document with a laser beam has, however, certain disadvantages associated with it.
  • One principal disadvantage is operator safety. As is understood, great care must be taken in handling lasers to prevent exposure of the user's eyes to the laser beam.
  • the laser beam In the aforedescribed system, the laser beam must be brought to the document viewing station or platen which is usually at or closely adjacent to the spot where the machine operator stands. Further, since the laser beam must either scan the platen or the document itself must be moved, some type of two-dimensional scanning motion must be provided for the laser beam.
  • a xerographic processor which includes a laser scanning arrangement that can be used in either of two modes.
  • the scanning laser beam is modulated to produce an electrostatic latent image on a photoconductive surface
  • an unmodulated laser beam is caused to scan electrostatic latent images on the photoconductive surface, causing a discharge current which is detected to provide a signal representing the image.
  • This method of operating in the reading mode is intended to improve on the techniques of scanning the original (as described above) or scanning the developed image on the photoconductive surface.
  • One technique for reading developed images on a photoreceptor is described in US-A-4042962.
  • the present invention is intended to overcome the disadvantages of these known systems.
  • the invention provides a copying apparatus which is characterised in that said read means includes a tube-like member for collecting scattered radiation resulting from the scanning, with said beam, of developed images on said photoreceptor, and detector means within the tube-like member for converting collected radiation to image signals representative of the image developed on said photoreceptor.
  • a multi-mode reproduction apparatus operable selectively in a COPY mode to xerographically make copies of original documents in the manner typical of xerographic copiers or machines, in a WRITE mode to xerographically produce copies from image signals input thereto using a flying spot type scanner, and in a READ mode to read images developed on the machine photoreceptor with the same flying spot scanner to produce image signals representative thereof and thereby convert the image to electronic signals.
  • Xerographic reproduction apparatus 10 includes a viewing station or platen 12 where document originals 13 to be reproduced or copied are placed.
  • a light/lens imaging system 11 is provided, the light/lens system including a light source 15 for illuminating the original 13 at platen 12 and a lens 16 for transmitting image rays reflected from the original 13 to the photoconductive surface 19 of drum 18 at exposure station 21.
  • Charging station 20 includes a corona charging means 23 for depositing a uniform electrostatic charge on the photoconductive surface 19 of drum 18 in preparation for imaging.
  • a suitable developing mechanism which may for example comprise a magnetic brush 25, is provided at developing station 22 for developing the latent electrostatic images created on drum 18.
  • corona transfer means 27 effects transfer of the developed image to a suitable copy substrate material 28.
  • a suitable drum cleaning device such as a rotating cleaning brush 33 is provided at cleaning station 32 for removing leftover developing materials from the surface 19 of drum 18.
  • Brush 33 may be disposed in an evacuated housing through which leftover developer materials removed from the drum surface by the cleaning brush are exhausted.
  • photoconductive surface 19 comprises a uniform layer of photoconductive material such as amorphous selenium on the surface of drum 18.
  • Drum 18 is supported for rotation by suitable bearing means (not shown).
  • a suitable drive motor (not shown) is drivingly coupled to drum 18 and rotates drum 18 in the direction shown by the solid line arrow when processing copies.
  • the photoconductive surface 19 of drum 18 is charged to a uniform level by corona charging means 23. Platen 12 and the original document 13 thereon is irradiated by light source 15, the light reflected from document 13 being focused onto the photoconductive surface 19 of drum 18 by lens 16 at exposure station 21. Platen 12 and the document 13 thereon are at the same time moved in synchronism with rotation of the drum 18. The light reflected from the original 13 selectively discharges the charged photoconductive surface in a pattern corresponding to the image that comprises the original document.
  • the latent electrostatic image .created on the surface 19 of drum 18 is developed by magnetic brush 25 and transferred to copy substrate material 28 through the action of transfer corona means 27. Following transfer, the photoconductive surface 19 of drum 18 is cleaned by cleaning brush 33 to remove leftover developer material. A suitable fuser or fixing device (not shown) fixes the image transferred to copy substrate material 28 to render the copy permanent.
  • drum type photoconductor is illustrated other photoconductive types such as belt, web, etc. may be envisioned. Photoconductive materials other than selenium, as for example, organic may also be contemplated. And while a scan type imaging system is illustrated, other types of imaging systems such as full frame flash, may be contemplated.
  • the photoconductor may be opaque, that is impervious to light, or wholly or partially transparent.
  • the exemplary drum 18 typically has an aluminum substrate which renders the drum opaque. However, other substrate materials such as glass may be contemplated, which would render drum 18 wholly or partially transparent.
  • One organic photoconductive material consists of an aluminized mylar substrate having a layer of selenium dispersed in poly-N-vinyl carbazole with a transparent polymer overcoating containing a charge transport compound such as pyrene.
  • Xerographic reproduction apparatus 10 includes a flying spot scanner 59.
  • Scanner 59 has a suitable flux source of electromagnetic radiation such as laser 60.
  • the collimated beam 61 of monochromatic radiation generated by laser 60 is reflected by mirror 61 to a modulator 65, which for operation in the WRITE mode, modifies the beam 61 in conformance with information contained in image signals input thereto, as will appear.
  • Modulator 65 may comprise any suitable modulator, such as acousto-optic or electro-optic type modulators for imparting the information content of the image signals input thereto to beam 61.
  • Beam 61 is diffracted by disc reflector 68 of a holographic deflector unit 70.
  • Deflector 68 comprises a substantially flat disc-like element having a plurality of grating faces or facets 71 forming the outer periphery thereof.
  • Deflector 68 which is preferably glass, is driven by motor 72.
  • deflector 68 is disposed so that light beam 61 is incident to the facets 71 thereof at an angle of substantially 45°.
  • the diffracted scanning beam 61' output by deflector 68 exits at a complementary angle.
  • the scanning beam 61' output by deflector 68 passes to an imaging lens 75.
  • lens 75 is located in the optical path between deflector 68 and mirror 77, lens 75 being of a diameter suitable to receive and focus the scanning light beam diffracted by facets 71 of deflector 68 to a selected spot in the focal plane proximate the surface 19 of drum 18, as will appear.
  • the scanning beam 61' from lens 75 is reflected by mirror 77 to read/write control mirror 78.
  • Mirror 78 when in the solid line position shown in the drawings, reflects beam 61' to mirror 80 which. in turn reflects the beam to a location on the surface 19 of drum 18 downstream of developer 22.
  • the photoconductive material In the case where the photoconductive material is opaque, light impinging on the surface 19 of drum 18 is scattered. In the case where the photoconductive material is transparent, the light is transmitted, depending on the degree of transparency of the photoconductive material through the photoconductive material to the drum interior. As will be understood, scattered light is composed of both specular and diffuse reflected light while transmitted light is composed of specular and diffuse transmitted light. The scattered or transmitted light from the photoconductive surface 19 of drum 18 and the developed image thereon is collected in integrating cavity 100, and there converted to image signals when operating in the READ mode, as will appear.
  • Read/write control mirror 78 is supported for limited movement between a read position (shown in solid line in the drawing) and a write position (shown in dotted line in the drawing).
  • a suitable driving mechanism such as solenoid 82 is provided to selectively move the mirror 78 from one position to the other.
  • Return spring means (not shown) may be provided to return mirror 78 to the original position upon deenergization of solenoid 82.
  • the scanning beam.61' is reflected by mirror 78, 85 to a location on the surface of drum 18 upstream of developer 22.
  • integrating cavity 100 consists of elongated hollow cylindrical housing 105 disposed adjacent and in predetermined spaced relationship to the surface 19 of drum 18, housing 105 being supported such that the longitudinal axis of housing 105 substantially parallels the axis of drum 18.
  • Housing 105 provided with an elongated slit-like aperture 107 in the wall thereof opposite the photoconductive surface 19 of drum 18, housing 105 being located such that light scattered from the drum surface and the developed image thereon passes through aperture 107 into the interior 106 of housing 105.
  • a pair of photodetectors 108,108' are provided in housing 105 at the end thereof, photodetectors 108, 108' generating signals in response to the presence or absence of light.
  • the interior wall 107 thereof is preferably finished with a highly reflective material such as a highly reflective tambertian coating.
  • integrating cavity 100 is suitably supported within the interior of drum 18 to receive light transmitted through the photoconductive material.
  • latent electrostatic images are formed on the photoconductive surface 19 of drum 18 through exposure of the document 13 on platen 12 as described heretofore.
  • latent electrostatic images are created on the charged photoconductive surface 19 of drum 18 by means of the flying spot scanner 59 in accordance with image signals input thereto.
  • solenoid 82 is energized to move control mirror 78 to the write position (the dotted line position shown in Figure 1). In this position, mirrors 78, 85 cooperate to reflect scanning beam 61' to a point on the surface 19 of drum 18 upstream of developing station 22.
  • modulator 65 modulates the light intensity of scanning beam 61' in accordance with the content of the image signals input thereto so that scanning beam 61' dissipates the electrostatic charge on the drum surface to create a latent electrostatic image representative of the image signals input thereto.
  • the electrostatic latent image so created is thereafter developed by magnetic brush 25 and transferred to copy substrate material 28 by corona transfer means 27 at transfer station 26. Following transfer, the surface of drum 18 is cleaned by cleaning brush 33 as described.
  • deflector 68 In this mode, and in the image READ mode described below, deflector 68 is continually driven at substantially constant velocity by motor 72. In the WRITE mode, the image signal source is controlled so as to be synchronized with rotation of deflector 68.
  • the rotational rate of xerographic drum 18 which determines the spacing of the scan line, is preferably synchronized to the signal source in order to maintain image linearity.
  • solenoid 82 is deenergized to place control mirror 78 in the read position (the solid line position shown in Figure 1). In this position, mirror 78 cooperates with mirror 80 to reflect the scanning beam 61' to the surface 19 of drum 18 at a point downstream of developing station 22. As a result, scanning beam 61' scans across the surface of drum 18 and any image developed thereon.
  • a latent electrostatic image of the original 13 on platen 12 is created on the surface 19 of drum 18 through exposure of the original 13 and subsequent development by magnetic brush 25 in the manner described heretofore.
  • the developed image is carried on drum 18 from developing station 22 to transfer station 26, the image is scanned line by line by the scanning beam 61'.
  • the light from beam 61' is sensed by integrating cavity 100 in accordance with the presence or absence of toner on the drum surface, it being understood that where the light beam strikes toner, the light is absorbed, whereas where the light beam strikes uncovered portions of the photoconductive surface 19 of drum 18, the light is scattered and reflected back by the photoconductive surface to integrating cavity 100.
  • the presence or absence of light in housing 105 is sensed by photosensors 108, 108' to provide an analog image signal representative of the developed image scanned.
  • Image signals output by photodetectors 108,108' may be used to produce additional copies of the original 13, or stored, or transmitted to a distant point, etc.
  • the developed image on drum 18 may be transferred to substrate material 28 in the manner described heretofore.
  • transfer may be dispensed with and the drum surface cleaned by cleaning brush 33.
  • a single scanning beam serves both to write images on the photoconductive surface 19 of drums 18 in the image WRITE mode and to read images developed on drum surface in the image READ mode.
  • a beam 161 is derived from laser 60 and passed via modulator 65 and lens 75 to a rotating scanning polygon 165.
  • the scanning beam 161' reflected from the mirrored surfaces 166 of polygon 165 impinges at a moving spot on the surface 19 of drum 18 at a location upstream of developing station 22.
  • Light collector 100 is spaced opposite the photoconductive surface 19 of drum 18 and the image developed thereon during the image READ mode.
  • the image signals generated by photodetectors 108, 108' are output to lead 168 and amplifier 169. Image signals are input to modulator 65 through lead 170 and amplifier 171 during operation in the image WRITE mode.
  • photoconductive drum 18 is cycled twice for each read operation.
  • a latent electrostic image is created on the photoconductive surface 19 of drum 18, normally through exposure of the original 13 on platen 12 as described heretofore.
  • the latent electrostatic image is thereafter developed by magnetic brush 25.
  • the developed image is carried on drum 18 past transfer station 26, cleaning station 32, charging station 20, and exposure station 21.
  • the image is scanned.
  • light scattered by the photosensitive surface 19 of drum 18 is reflected to integrating cavity 100 and there passes through slot 107 into housing 105 thereof where the light is sensed by photodetectors 108, 108'.
  • Photodetectors 108, 108' convert the reflected light into image signals representative of the developed image scanned.
  • the image signal are output to lead 168.
  • transfer corona means 27 is inactivated and suitable means such as camming elements 174, 175 are provided to move the copy substrate material 28 and cleaning brush 33 out of contact with the drum surface.
  • Camming elements 174, 175 are activated in timed synchronism with rotation of drum 18 during the first drum cycle. It will be understood that corona generating means 20 and light/lens imaging system 11 are inactivated while the developed image moves therepast.
  • a camming element 176 may be similarly provided to move magnetic brush 25 out of contact with the surface of drum 18 during the second drum cycle to permit the previously developed image to pass thereby following reading thereof by scanning beam 161'.
  • the developed image may thereafter be transferred to copy substrate material 28 following which the surface of drum 18 is cleaned by cleaning brush 33 as described heretofore.
  • camming elements 174, 175 are deactivated to return both the copy substrate material 28 and cleaning brush 33 into operative contact with the drum surface.
  • Corona transfer means 27 is activated to transfer the developed image to copy substrate material 28.
  • transfer of the developed image may be omitted and the developed image cleaned by cleaning brush 33 or magnetic brush 25 may be suitably biased to remove and return toner from the image to the developer sump.
  • integrating cavity 100 is replaced by a single photodetector 185.
  • a fres- nel lens strip 187 is provided astride the path of scattered light reflected from the drum surface.
  • Lens strip 187 the axis of which is substantially parallel to the axis of drum 18, has a length sufficient to receive light reflections as scanning beam 161' traverses from one end of drum 18 to the other.
  • lens strip 187 is of a type which focuses the divergent specular reflections from drum 18 to a common focal point.
  • the photodetector 185 is suitably supported in predetermined spaced relationship to lens strip 187 at substantially the focal point thereof.
  • the image signals from detector 185 are provided in output lead 168.
  • beam 161' When operating in the image READ mode, beam 161' is scanned across the developed image on the surface 19 of drum 18 as described heretofore. Light reflections from the photoconductive drum. surface as scanning beam 161 traverse back and forth, are focused by lens strip 187 onto photodetector 185 which converts the light reflections to image signals representative of the image scanned.
  • the aforedescribed multiple mode image processing system may also be operated advantageously to produce additional copies of an original 13 while at the same time permitting the platen 12 to be cleaned and a second original placed thereon.
  • the original 13 is first converted into image signals through operation of the system in the image READ mode described heretofore.
  • the image signals created are stored, either temporarily or permanently in suitable memory (not shown) and thereafter used as the source for additional copies through operation of the system in the image WRITE mode.
  • the original 13 may be removed from plate 12 and the next original to be copied or reproduced placed thereon.
  • a photoreceptor 200 is.thereshown in the form of an endless belt disposed about support rolls 202, 204.
  • Belt support roll 202 is drivingly coupled to a suitable drive motor 205, motor 205 when operated, moving belt 200 in the direction shown by the solid line arrow.
  • Belt support roll 204 comprises an idler roll.
  • An exposure station 210 has light/lens imaging system 211 disposed opposite the upper run 208 of photoreceptor 200.
  • a charging station 213 incorporating a suitable corona charging device is upstream of exposure station 210.
  • a magnetic brush 215 is provided at a developing station 216 for developing the latent electrostatic images produced on photoreceptor 200, developing station 216 being disposed downstream of exposure station 212 and adjacent belt support roll 204.
  • a transfer station 218 is provided along the lower belt run 209 of photoreceptor 200, and downstream thereof, a cleaning station 224 having cleaning brush 225 is provided opposite belt support roll 202.
  • a suitable copy substrate material 226 receives developed images from photoreceptor 200 at transfer station 218.
  • Suitable separating means exemplified herein by cams 227, 228, 229 are provided for disengaging magnetic brush 215, copy substrate material 226 and cleaning brush 225 respectively when operating in the image READ mode as will appear.
  • the developing and cleaning station components may be supported for pivoting movement into and out of operative engagement with photoreceptor 200.
  • a single scanning beam 261 is provided for both writing images on photoreceptor 200 in the - image WRITE mode and for reading images developed on the surface of photoreceptor 200 in the image READ mode.
  • Scanning beam 261 is derived from a suitable flux source such as laser 262.
  • the beam 261 output by laser 262 passes via modulator 265 and lens 267 to the mirrored facets 269 of a rotating polygon 270.
  • the beam is reflected by polygon 270 onto the upper belt run 208 of photoreceptor 200 at a point between exposure station 210 and developing station 216.
  • Photoreceptor 200 comprises any suitable photoconductive material which is at least partially transparent to light as for example, the exemplary organic photoreceptor described heretofore. And while photoreceptor 200 is illustrated in the form of an endless belt, other photoreceptor types such as replenishable web, drum, etc., may be contemplated.
  • light collector 100 is disposed opposite the point where scanning beam 261 strikes photoreceptor 200, collector 100 being supported by suitable means (not shown) adjacent to and in predetermined spaced relationship to the interior side 201 of photoreceptor 200.
  • the longitudinal axis of collector 100- is parallel to the line scanned by beam 261.
  • a latent electrostatic image is created by light/lens imaging system 211 on the moving, previously charged surface of photoreceptor 200 through exposure of a document original (not shown).
  • the image is thereafter developed by magnetic brush 215 and transferred at station 218.
  • photoreceptor 200 is cleaned by cleaning brush 225.
  • scanning beam 261 writes latent electrostatic images on the previously charged photoreceptor 200 in reponse to image signals input to modulator 265.
  • the electrostatic image is thereafter developed and transferred as described above. Following transfer, leftover developing materials are removed from photoreceptor 200 by cleaning brush 225.
  • developed images on photoreceptor 200 are scanned by scanning beam 261 on the second cycle of photoreceptor 200.
  • cams 228, 229 are actuated to separate copy substrate material 226 and cleaning brush 225 from photoreceptor 200 on the first cycle of photoreceptor 200.
  • the corona devices at transfer station 218 and charging station 213 are inactivated.
  • the developed image passes the point where scanning beam 261 impinges on the photoreceptor 200, the developed image is swept by beam 261.
  • light is transmitted through the toner free portions of photoreceptor 200, the presence or absence of light being responded to by detectors 108, 108' of collector 100 to produce analog image signals representative of the developed image scanned.
  • cam 227 is actuated to separate brush 215 from photoreceptor 200.
  • Cams 228, 229 are reset to enable transfer of the developed image to the copy substrate material 236 and removal of leftover developer materials from photoreceptor 200 by cleaning brush 225.
  • collector 100 is placed adjacent the lower belt run 209 of photoreceptor 200 and opposite the photoreceptor exterior surface.
  • Suitable means (not shown) are provided for supporting collector 100 in predetermined spaced relation to photoreceptor 200.
  • a suitable lens means 266 may be provided interiorly of photoreceptor 200 to maintain scanning beam 261 in focus following passage of the beam through the upper belt run 208 of photoreceptor 200.
  • cams 227, 228, 229 for separating magnetic brush 215, copy substrate material 226 and cleaning brush 225 from the photoreceptor surface may be dispensed with.
  • the developed image may be transferred to the copy substrate material 226 and the photoreceptor cleaned by cleaning brush 224 in the manner described heretofore.
  • collector 100 may be offset from the point where scanning beam 261 impinges on photoreceptor 200 in either or both of the Figures 6 and 7 embodiments.
  • suitable mirror means may be provided to direct the beam as the beam emerges from either the upper belt run 208 ( Figure 6) or lower belt run 209 ( Figure 7) into aperture 107 of collector 100.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)

Claims (8)

1. Appareil de reproduction comportant un photorécepteur (19), un moyen (23) pour charger le photorécepteur afin de préparer la formation d'image, un moyen d'exposition (15, 16) pour exposer le photorécepteur chargé et produire des images électrostatiques latentes, un moyen de développement (22) pour développer les images, et un moyen de transfert (27) pour transférer les images développées à un substrat de copie (28), l'appareil comportant en outre un moyen d'écri- ture/lecture d'image (59) qui comporte un moyen (60) pour produire un faisceau (61) à haute intensité de radiation électromagnétique;
- un moyen (75) pour focaliser le faisceau en un emplacement du photorécepteur; et
- un moyen de balayage (68) chevauchant le trajet du faisceau pour que le photorécepteur soit balayé par la faisceau;
- le moyen d'écriture comprenant un moyen (65) pour moduler le faisceau en conformité avec les signaux d'image afin de produire les images électrostatiques latentes lorsque le moyen d'écri- ture/lecture fonctionne dans le mode avec écriture; et
- le moyen de lecture comportant un moyen pour fournir des signaux électriques représentatifs d'une image à transmettre à un emplacement situé à distance lorsque le moyen d'écriture/lec- ture fonctionne dans le mode avec lecture, caractérisé en ce que:
- le moyen de lecture comprend un élément en forme de tube (100) pour receuillir la radiation diffusée provenant du balayage, avec le faisceau des images développées sur la photorécepteur, et un moyen de détecteur (108) à l'intérieur de l'élément en forme de tube pour transformer la radiation receuillie en signaux d'image représentatifs de l'image déveoppée sur le photorécepteur.
2. Appareil selon la revendication 1, dans lequel le photorécepteur (19) est sensiblement opaque, le moyen de lecture lisant la radiation réfléchie par le photorécepteur.
3. Appareil selon la revendication 1, dans lequel les photorécepteur est au moins partiellement transparent, le moyen de lecture lisant la radiation transmise par le photorécepteur (figures 6 et 7).
4. Appareil selon la revendication 3, où l'élément en forme de tube (100) du moyen de lecture est disposé à l'intérieur du photorécepteur pour recueillir la lumière transmise par l'intermédiaire du photorécepteur lors du balayage d'images développées sur la photorécepteur par le faisceau (figure 6).
5. Appareil selon l'une quelconque des revendications 1 à 4, comprenant un moyen de commande (78) pour actionner sélectivement le moyen d'écriture ou le moyen de lecture pour soit écrire des images sur le photorécepteur, soit lire des images développées sur le photorécepteur.
6. Appareil selon la revendication 5, où le moyen de commande (78) est disposé de manière à faire tomber sélectivement le faisceau sur le photorécepteur à un emplacement situé en aval du moyen de développement et permettre le balayage d'images sur le photorécepteur après développement des images ou à un emplacement situé en amont du moyen de développement afin de permettre l'écriture d'images sur le photorécepteur pour développement par le moyen de développement.
7. Appareil selon la revendication 1, où le faisceau (161') est focalisé sur le photorécepteur en un endroit situé en amont du moyen de développement.
8. Appareil selon la revendication 7, comprenant un moyen pour recycler le photorécepteur afin d'amener l'image développée en relation de balayage avec le faisceau et un moyen (174, 175) pour rendre inopérant le moyen de transfert afin de permettre un déplacement non entravé de l'image développée au droit du moyen de transfert et en relation de balayage avec la faisceau.
EP81300159A 1980-01-14 1981-01-14 Machine à copier Expired EP0033594B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US111519 1980-01-14
US06/111,519 US4294534A (en) 1980-01-14 1980-01-14 Multiple function reproduction apparatus
US06/111,520 US4345835A (en) 1980-01-14 1980-01-14 Multiple function reproduction apparatus
US111520 1980-01-14

Publications (3)

Publication Number Publication Date
EP0033594A2 EP0033594A2 (fr) 1981-08-12
EP0033594A3 EP0033594A3 (en) 1982-06-09
EP0033594B1 true EP0033594B1 (fr) 1986-01-08

Family

ID=26808991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81300159A Expired EP0033594B1 (fr) 1980-01-14 1981-01-14 Machine à copier

Country Status (2)

Country Link
EP (1) EP0033594B1 (fr)
DE (1) DE3173408D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4624543A (en) * 1981-08-26 1986-11-25 Savin Corporation Method and apparatus for electrophotographically processing information

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4042962A (en) * 1971-03-01 1977-08-16 Canon Kabushiki Kaisha Composite information operating method and apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3638232A (en) * 1970-01-23 1972-01-25 Sperry Rand Corp Real-time coherent optical processor
US4046471A (en) * 1975-11-03 1977-09-06 International Business Machines Corporation Dual mode electrophotographic apparatus having dual function printing beam
US4204725A (en) * 1977-11-17 1980-05-27 International Business Machines Corporation Apparatus for detecting information stored on photocopying media, transmitting and storing the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4042962A (en) * 1971-03-01 1977-08-16 Canon Kabushiki Kaisha Composite information operating method and apparatus

Also Published As

Publication number Publication date
DE3173408D1 (en) 1986-02-20
EP0033594A2 (fr) 1981-08-12
EP0033594A3 (en) 1982-06-09

Similar Documents

Publication Publication Date Title
US4336994A (en) Multi-mode color copier
US4321630A (en) Linear integrating cavity light collector
EP0047180B1 (fr) Appareil de reproduction
US4314283A (en) Diffraction based light collector
US4027961A (en) Copier/raster scan apparatus
CA1087675A (fr) Commande de reaction pour dispositif de decharge a laser
US4330195A (en) Multiple mode image processing apparatus and method
EP0249479B1 (fr) Appareil de copie à sortie sélective
US4294534A (en) Multiple function reproduction apparatus
US4345835A (en) Multiple function reproduction apparatus
US4336993A (en) Light collector rod for use in xerographic systems
US5113202A (en) Electronic single pass, two color printing system
US4783687A (en) Segmented filament light source with improved illumination output uniformity
US4376576A (en) Light collector rod for use in xerographic systems
US4320955A (en) Copy reproduction apparatus
EP0033594B1 (fr) Machine à copier
US4355882A (en) Multiple function reproduction apparatus
US4783680A (en) Halftone screening system for printer/copier
EP0123437B1 (fr) Dispositif de lecture pour document
EP0410490B1 (fr) Imprimante à rayons laser
EP0047631B1 (fr) Bâton collecteur de lumière utilisé dans un analyseur à spot mobile
GB2088169A (en) Multi-mode Colour Copier
JPS6116981B2 (fr)
JPH0212179A (ja) 画像形成装置
JPH10133459A (ja) 複写装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB NL

17P Request for examination filed

Effective date: 19811005

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): DE FR GB NL

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB NL

REF Corresponds to:

Ref document number: 3173408

Country of ref document: DE

Date of ref document: 19860220

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19890131

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19900801

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19980105

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19980109

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19980123

Year of fee payment: 18

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990114

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990114

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991103

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST