EP0086683B1 - Vorrichtung zum Aufbringen von Feststoffteilchen auf einen Aufzeichnungsträger einer Druckvorrichtung - Google Patents

Vorrichtung zum Aufbringen von Feststoffteilchen auf einen Aufzeichnungsträger einer Druckvorrichtung Download PDF

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Publication number
EP0086683B1
EP0086683B1 EP83400099A EP83400099A EP0086683B1 EP 0086683 B1 EP0086683 B1 EP 0086683B1 EP 83400099 A EP83400099 A EP 83400099A EP 83400099 A EP83400099 A EP 83400099A EP 0086683 B1 EP0086683 B1 EP 0086683B1
Authority
EP
European Patent Office
Prior art keywords
particles
transport
deflector
transport member
transport element
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
EP83400099A
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English (en)
French (fr)
Other versions
EP0086683A1 (de
Inventor
Raymond Bongrain
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.)
Bull SA
Original Assignee
Bull SA
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
Application filed by Bull SA filed Critical Bull SA
Publication of EP0086683A1 publication Critical patent/EP0086683A1/de
Application granted granted Critical
Publication of EP0086683B1 publication Critical patent/EP0086683B1/de
Expired legal-status Critical Current

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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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
    • G03G15/0813—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by means in the developing zone having an interaction with the image carrying member, e.g. distance holders
    • 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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush

Definitions

  • the present application relates to an improvement to the device for applying solid particles to the recording medium of a non-impact printer, described in FR-A-2408462 in the name of the International Company for IT CII- HONEYWELL BULL.
  • Printing machines of this kind generally comprise a recording medium, most often consisting of a rotary drum or an endless belt, on the surface of which it is possible to form, by electrostatic or magnetic means, sensitized zones also called latent images, which correspond to the characters or images to be printed. These latent images are then developed, that is to say made visible, with the aid of a powdery revealing pigment which, deposited on the recording medium, is only attracted by the sensitized zones of the latter. this. After which, the pigment particles which have thus been deposited on these latent images are transferred to a support sheet, such as a sheet of paper for example, on which they are permanently fixed.
  • a support sheet such as a sheet of paper for example
  • a device which comprises a cylindrical casing containing the powdered pigment, this casing having an opening in front of which the recording medium passes, the inking of this medium being produced by a cylindrical brush which, rotating inside the casing, projects the pigment particles towards the surface of the support which passes in front of this opening.
  • this device does not give complete satisfaction to the use of the fact that it causes, on the one hand the formation of a cloud of pigment particles which spreads outside the casing, which is particularly unpleasant for people who, being near the printer, are reached by this cloud, on the other hand, an undesirable electrification of the particles which, projected towards the support, can then remain on the non-sensitized zones of this one consequently of an electrostatic attraction.
  • the device which is described in the above-mentioned patent overcomes these drawbacks. It is a device for applying, on the recording medium of a non-impact printer, solid particles contained in a reservoir, this device comprising a transport element arranged to bring these particles to the vicinity of the surface of this support, said device being characterized in that it further comprises a deflector interposed between this support and this transport element for collecting the particles transported by this element, this deflector having one of its edges disposed in the immediate vicinity of said support for constitute with this support a trough, of substantially prismatic shape, in which the particles thus collected accumulate, this support being displaced in the direction where it entrains these particles towards the edge of said prism, the particles entrained beyond this edge remaining applied only to the sensitized areas of said recording medium.
  • the device described in the aforementioned patent has the drawback of requiring frequent filling of the reservoir with solid particles.
  • the transport element consisting for example of a rotary cylinder, can no longer supply particles to the recording medium as soon as the level of particles in the reservoir falls below the lower end of the element transport.
  • worms are expensive parts.
  • they cannot be completely immersed in the pulverulent pigment because on the one hand, the mechanical power to be supplied for the rotation of these screws is then significant, on the other hand, in the case where the pulverulent pigment consists of particles coated with a thermoplastic resin, this pigment is subjected to crushing and rolling by the screws and the resin melts due to the friction which results therefrom, thus giving agglomerates of particles in the tank; in addition, particles are pushed against the various bearings provided in the walls of the tank to ensure the rotation of the screws and this results in jamming of the corresponding axes of rotation because there are no means that are both simple and suitable for sealing the bearings.
  • the screws supply the transport element with particles in a discontinuous manner, which creates beads of particles on the transport element and, conversely, zones deprived of these particles, which are detrimental for the application of said particles. to the recording medium.
  • the object of the present invention is to remedy the drawback of a supply device comprising, according to the aforementioned patent, only one transport element (associated with a deflector), without however having the drawbacks of a worm device previously mentioned.
  • It relates to a device for applying, on the recording medium of a non-impact printer, solid particles according to claim 1 of the main patent, characterized in that it further comprises a shaped transport member cylindrical, designed to bring, by rotation about its axis, particles in the vicinity of the transport element, as well as another deflector interposed between this transport member and this transport element to allow the transfer of particles from the transport member to the transport element.
  • a cylindrical transport member is less expensive than a worm, can be completely immersed in the particle powder and allows this powder, due to the symmetry of this member, to arrive regularly. on the transport element, without seizing of bearings and without the formation of agglomerates of particles.
  • this device also comprises a means for mixing the particles in the reservoir.
  • This stirring means causes a re-spreading of the powder in the reservoir, which avoids any local exhaustion thereof.
  • the device according to the invention further comprises at least one other transport member of cylindrical shape, provided for supplying, by rotation about its axis, said transport member with particles, by means of a deflector interposed between said member and said other transport member, so as to have a reserve of particles in the tank itself.
  • said other deflector extends over a length of the order of a centimeter, between said element and said transport member, and leaves between itself and this transport member a space at most equal to a millimeter and between itself and said transport element, a space of the order of 5 mm.
  • the solid particles being attracted by a magnet, said transport member and said transport element are magnetic on the surface.
  • FIG. 1 there is shown schematically a particular embodiment of the application device 5 object of the invention in the case of a magnetic printer.
  • a part of this printer is schematically represented in FIG. 1. It comprises, as explained in the aforementioned patent, a recording medium constituted, in the example described, by a magnetic drum 2 driven in rotation, in the direction of arrow F l , by an electric motor (not shown).
  • the recording of information on this drum is carried out by a magnetic recording member 3.
  • this member 3 is formed by an assembly comprising several magnetic recording heads which, placed one beside the others, are aligned parallel to the axis of rotation A i of the drum 2.
  • Each of these heads generates, when it is excited repeatedly by an electric current, a variable magnetic field, which has the effect of creating domains magnetized 4, or "magnetic dots", on the surface of the drum which passes in front of the recording member 3, the instants of excitation of these heads being established in known manner, so as to obtain on this surface of the drum zones magnetized, which are sets of said domains 4, sets also called latent images and whose shape corresponds to that of the characters to be printed.
  • the magnetized areas of the drum then pass in front of the application device 5 which is arranged below the drum 2 and which makes it possible to apply to the surface of the drum particles of a pulverulent pigment P contained in a reservoir 6.
  • this pigment consists of magnetic particles coated with a resin which, by heating, is capable of melting and fixing on a paper on which it has been deposited. It should however be pointed out that the nature of this pigment is not specific to the invention and that, in the case of an electrostatic printer to which of course the invention applies, this pigment could very well consist of a known powder containing no magnetic particles.
  • the pigment mainly adheres to the magnetized areas 4, thus forming deposits 7 of particles (FIG. 2) on the surface of the drum 2.
  • Touch-up means consisting of a rotating magnetic cylinder 8 disposed in the vicinity of the drum 2 are then provided for eliminate the particles having adhered elsewhere than on the magnetized domains 4 as well as the particles in excess on said domains.
  • a small deflector 8b is arranged near the cylinder 8 retouching to cause the particles captured by this retouching cylinder to fall back into the tank 6. But this retouching 8 creates chains of particles which lie on the drum 2 and which one seeks to eliminate by means of another retouching by suction 9.
  • the particles are transferred to a support sheet such that 'a sheet of paper 10 applied against the drum by means of a transfer roller 11.
  • the particles which remain on the drum are removed in a cleaning station 12 then the magnetic points are erased by an erasing module 13, at after which a new printing cycle can take place.
  • the application device 5 comprises, on the one hand, a transport element 14, which removes particles of pigment from the reservoir 6, when the level of the particles is sufficient raised in this tank, to bring them near the surface of the drum 2, on the other hand, a fixed deflector 15 which is interposed between the transport element 14 and the drum 2 to collect the particles transported by this element 14 and apply them to the surface of the drum 2.
  • the transport element 14 consists for example of a magnetic cylinder whose axis of rotation A 2 is parallel to the axis A, of the drum 2 and can rotate in two bearings not shown, which are respectively provided with the side faces of the reservoir 6. Only the rear side face 16 is shown in Figure 1, the front side face, located in front of Figure 1, not being shown.
  • the deflector 15, shown in FIG. 2, is a part fixed to the two lateral faces of the tank 6 and having a planar face 17 limited by a first and a second edge 18 and 19 parallel to the axes A, and A 2 , the second edge 19 preferably forming a sharp edge to avoid an accumulation of particles on said edge.
  • the deflector 15 is arranged so that its face 17 forms, with the plane defined by the axis A, of the drum and the axis A 2 of the element, a dihedral whose edge is formed by the first edge 18 and is close to the transport element 14 and whose angle is less than 45 degrees. Furthermore, this deflector 15 is provided so that the sharp edge 19 is in the vicinity of the drum 2.
  • the deflector 15 is constituted by a semi-cylindrical rod arranged so that said flat face 17 (c ' i.e. the diametral plane defining this rod) contains the axes A, and A 2 .
  • the transport element 14 has a direction of rotation, indicated by the arrow F 2 in FIG. 2, intended to drive the particles towards this face 17.
  • the space between the transport element and the first edge 18 of the deflector is chosen low enough so that the particles are mostly stopped in passing by the deflector 15 and then accumulate in a trough 20 delimited by the surface of the transport element 14 and by the face 17 of the deflector 15.
  • the direction of rotation of the drum 2, indicated by the arrow F, in FIG. 2 is chosen so that the particles accumulated in the bucket 20 are entrained towards the sharp edge 19 of the deflector 15, so that part of between them can be applied to the magnetized areas of the drum 2.
  • the particles thus entrained by the drum 2 are not stopped in passing by the deflector 15, owing to the fact that the latter does not touch the surface of the drum and which it therefore leaves, between the edge v ive 19 and the drum, an opening whose width is sufficient to allow the pigment particles entrained by the drum to exit from the bucket 20.
  • the pigment particles which, applied to the magnetized zones of the drum, exit from the bucket 20, continue to adhere to these zones and thus make visible the characters which must be printed while those which leave the bucket 20 without being retained by the drum generally fall back into the tank 6.
  • the application device 5 further comprises, on the one hand, a transport member 21 which removes particles of pigment from the reservoir 6 to bring them in the vicinity of the surface of the transport element 14, on the other hand, another deflector 22 which is interposed between the transport member 21 and the transport element 14 to collect the particles transported by the transport member 21 and transfer them to the surface of the transport element 14.
  • Said transport member 21 is disposed in the reservoir 6, below the transport element 14 and consists of a cylinder which is magnetic in the example described and whose axis A 3 of rotation is parallel to the axes A, and A 2 previously defined and can rotate in two bearings not shown, which are provided with the lateral faces of the reservoir 6.
  • the other deflector 22, shown in FIG. 2, is a part fixed to the two lateral faces. of the reservoir 6 and having a flat face 23 limited by a first and a second edge 24 and 25 parallel to the axis A 2 of the transport element 14 and to the axis A 3 of the transport member 21.
  • the other deflector 22 is arranged so that its planar face 23 forms, with the plane defined by the axes A 2 and A 3 , a dihedral whose edge is formed by the first edge 24 and is close to the member 21 of transport and whose angle is less than 45 degrees.
  • the other deflector 22 is provided so that its second edge 25 is in the vicinity of the transport element 14.
  • the other deflector 22 is constituted by a semi-cylindrical rod arranged so that its flat face 23 (that is to say the diametral plane defining this rod) contains the axes A 2 and A 3 '''
  • the transport member 21 has a direction of rotation indicated by an arrow F 3 in FIG. 2 and provided, as a function of the direction of rotation of the transport element 14, for driving the particles towards the flat face 23 of the deflector 22 , particles which are then entrained towards the transport element 14.
  • the directions of rotation are such that an upward movement of parties is created. pigment cules.
  • the seating faces 17 and 23 are turned to the left, the member 21 and the transport element 14 rotate clockwise and the drum 2, in the direction reverse.
  • the deflector 15 which is interposed between the magnetic drum 2 and the transport element 14, is essentially intended to ensure proper application of pigment particles on this drum 2, while preventing the magnetized domains 4 which have been formed on this drum from being greatly altered at the moment when, passing in front of the transport element 14, they are subjected to the action of magnetic fluxes of dispersion generated by this element 14.
  • the other deflector 22, which is interposed between the transport element 14 and the transport member 21, has essentially the purpose, when the level of particles in the tank 6 becomes lower than that of the top of the member 21, to ensure a consumable reserve of particles which makes it possible to regularly supply particles with the transport element 14 and provides a good distribution of the particles on the surface of this element Even if, as a result of slight variations in the driving speed of the transport member 21, for example, the arrival of the particles in this reserve becomes irregular.
  • a means 27 for mixing the pulverulent pigment is added to the reservoir 6.
  • This mixing means 27 has an axis of rotation A 4 parallel to that of the transport member 21 and carried by two bearings, not shown, placed on the lateral faces of the tank 6.
  • said mixing means 27 is by example placed at the same level as the transport member 21. We can also place this transport member 21 at the bottom of the tank 6, so that the maximum of particles of said tank is consumed.
  • a particular embodiment of the stirring means 27 is shown diagrammatically and in part in FIG. 4. It essentially comprises the axis A 4 of rotation and two rods 27a and 27b taking the form of slots, made integral with said axis and arranged perpendicularly to each other.
  • the rotation of the stirring means 27 is for example intended to take place in a direction, indicated by the arrow F, in FIG. 1, identical to that of the rotation of the transport member 21.
  • the capacity of the reservoir 6 can be further increased by increasing its depth, which is shown by dashed lines 6a in FIG. 1, and by placing in this reservoir another transport member 28, constituted by a magnetic cylinder and placed below said transport member 21.
  • the axis of rotation A s of this other member 28 is parallel to the axis A 3 and carried by two bearings, not shown, placed in the lateral faces of the tank 6.
  • a third deflector 29 is interposed between said member 21 and said other transport member 28. This other member 28 thus feeds the transport member 21 with particles, via the third deflector 29.
  • This third deflector 29 is fixed to the lateral faces of the tank 6, is for example constituted like the other deflector 22, thus presents a flat face 30 and is disposed, between the other member 28 and the transport member 21, as is arranged the other deflector ⁇ 22, between this transport member 21 and the transport element 14.
  • the direction of rotation of said other member 28, represented by an arrow F s in FIG. 1, is then chosen identical to that of said transport member 21.
  • Qn can arrange the element 14, the member 21 and the other transport member 28 so that their respective axes of rotation are in the same plane and arrange the other deflector 22 and the third deflector 29 so that they have their respective flat faces 23 (Figure 2) and 30 ( Figure 1) in said plane.
  • Another means 31 of stirring can also be added in the reservoir 6, at the level of the other transport member 28.
  • the particles can then pass from a maximum level 32 to a minimum level 33 corresponding to the bottom of the other transport member 28.
  • the latter does not intervene, but it contributes to supplying the drum 2 with particles when the level of these particles has dropped sufficiently to be at the level of this other member 28.
  • a level sensor could be provided to indicate to the users of the printer when the minimum level 33 is reached.
  • FIG. 3 there is shown schematically a particular embodiment of the transport member 21. It comprises a cylinder 21a of axis A 3 , coated with a strip 21b which is permanently magnetized and which is formed, in the example described, by rubber in which metallic particles are permanently magnetized.
  • FIG. 3 shows that this strip 21b has been magnetized so as to present on its external face 21c successive magnetized zones 21 whose polarity is such that any two consecutive magnetization zones have opposite magnetic polarities.
  • the polarity of these successive magnetized zones is alternately north and south, the north and south poles being designated, in FIG. 3, respectively by the letters N and S. Under these conditions, part of the pigment particles found in the reservoir 6 ( Figure 1) is attracted by the strip 21b.
  • the mode of magnetization of the strip 21b which has just been described is not exclusive of the invention and one could use any other mode of magnetization allowing the strip 21b to attract the pigment particles.
  • the other transport member 28 and the transport element 14 can be produced in the same way.
  • the sliding cover 34 of the reservoir 6 is also seen, this cover being stopped by a stop 35 so as not to damage the drum 2.
  • a part of the pinions allowing the rotation of the retouching means 8 (pinion 8a), of the transport element 14 (pinion 14a), of the transport member 21 (pinion 21a) and of the threshing means 27 (pinion 27c).
  • the pinion allowing the rotation of the other transport member 28, nor that which allows the rotation of the other threshing means 31 has not been shown.
  • some of the intermediate pinions 36 necessary to obtain suitable directions of rotation as well as the motor pinion 37 driven by a motor not shown and allowing the drive of all the other pinions.
  • This set of pinions can be produced by a person skilled in the art and placed outside the tank 6, for example on the other side of the external face 16 in FIG. 1.
  • the deflector 22 and the other deflector 29 are made of a magnetic material
  • the distances D1, D2, D3, D4 ( Figure 2) respectively between the drum 2 and the deflector 15, between the latter and the transport element 14, between the latter and the other deflector 22, between the latter and the other transport member 21, are respectively equal to 1 mm, 0.5 mm, 5 mm, 0.5 mm
  • the respective widths L1 and L2 of the faces 17 and 23 are of the order of 1 cm
  • the respective rotational speeds of the transport element 14 and of the transport member 21 are respectively of the order of 50 revolutions per minute and 30 revolutions per minute.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)
  • Non-Mechanical Conveyors (AREA)
  • Ink Jet (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)

Claims (5)

1. Vorrichtung zum Aufbringen von Feststoffteilchen eines pulverförmigen Pigmentes, das in einem Behälter (6) enthalten ist, auf den Aufzeichnungsträger (2) eines anschlaglos arbeitenden Druckers, wobei der Behälter (6) unter diesem Träger angeordnet ist und die Vorrichtung versehen ist mit einem Transportelement (14), welches derart angeordnet ist, daß es diese Teilchen in die Nähe der Oberfläche dieses Trägers (2) bringt, und mit einem zwischen diesem Träger (2) und diesem Transportelement (14) eingefügten Umlenkteil (15), um die durch dieses Element transportierten Teilchen aufzufangen, wobei dieses Umlenkteil (15) mit einem (19) seiner Ränder in unmittelbarer Nähe des genannten Trägers angeordnet ist, um mit diesem Träger einen im wesentlichen prismaförmigen Trog (20) zu bilden, worin die so aufgenommenen Teilchen angesammelt werden, wobei dieser Träger (2) in solcher Richtung (F,) angetrieben wird, daß er die Teilchen zur Kante des genannten Prismas mitnimmt, wobei ferner die über diese Kante hinaus mitgenommenen Teilchen nur an den sensibilisierten Zonen (4) des genannten Aufzeichnungsträgers (2) anhaften bleiben, und wobei die Aufbringvorrichtung dadurch gekennzeichnet ist, daß sie ferner ein zylinderförmiges Transportorgan (21) umfaßt, welches unter dem Transportelement (14) angeordnet und vorgesehen ist, um durch Drehung um seine Achse (A3) Teilchen in die Nähe dieses Transportelementes (14) zu bringen, sowie ein weiteres Umlenkteil (22) umfaßt, das zwischen diesem Transportorgan (21) und diesem Transportelement (14) eingefügt ist, dergestalt, daß ein Teilchenvorrat zur Verfügung steht, wenn der Füllstand der Teilchen in dem Behälter (6) unter das Niveau der Oberseite dieses Transportorgans (21) absinkt.
2. Aufbringvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie ferner eine Einrichtung (27) zum Umrühren der Teilchen in dem Behälter (6) umfaßt.
3. Aufbringvorrichtung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß sie ferner wenigstens ein weiteres Transportorgan (28) zylindrischer Form umfaßt, welches vorgesehen ist, um durch Drehung um seine Achse (A5) das genannte Transportorgan (21) mit Teilchen zu versorgen, und zwar über ein Umlenkteil (29), welches zwischen dem genannten Organ (21) und dem genannten weiteren Transportorgan (28) eingefügt ist, dergestalt, daß ein Teilchenvorrat in dem Behälter (6) selbst zur Verfügung steht.
4. Aufbringvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das genannte weitere Ablenkteil (22) sich über eine Länge in der Größenordnung von einem Zentimeter zwischen dem genannten Element (14) und dem genannten Transportorgan (21) erstreckt und zwischen sich selbst und diesem Transportorgan (21) einen Raum bewahrt, der höchstens gleich einem Millimeter ist, und zwischen sich selbst und dem genannten Transportelement (14) einen Raum in der Größenordnung von 5 mm bewahrt.
5. Aufbringvorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Festteilchen durch einen Magnet anziehbar sind und das Transportorgan (21) und as Transportelement (14) an der Oberfläche magnetisch sind.
EP83400099A 1982-02-11 1983-01-14 Vorrichtung zum Aufbringen von Feststoffteilchen auf einen Aufzeichnungsträger einer Druckvorrichtung Expired EP0086683B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8202205 1982-02-11
FR8202205A FR2521069A2 (fr) 1982-02-11 1982-02-11 Dispositif pour l'application de particules solides sur le support d'enregistrement d'une imprimante non-impact

Publications (2)

Publication Number Publication Date
EP0086683A1 EP0086683A1 (de) 1983-08-24
EP0086683B1 true EP0086683B1 (de) 1986-04-09

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Country Link
US (1) US4430957A (de)
EP (1) EP0086683B1 (de)
JP (1) JPS58171067A (de)
DE (1) DE3362837D1 (de)
FR (1) FR2521069A2 (de)

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DE3632474A1 (de) * 1986-09-24 1988-03-31 Siemens Ag Nichtmechanisches druck- oder kopiergeraet mit einer im entwicklungsbereich angeordneten belichtungseinrichtung
FR2639726B1 (fr) * 1988-11-29 1991-01-11 Bull Sa Dispositif pour la reintroduction, dans un reservoir ouvert a l'air libre, de particules solides de revelateur qui ont ete separees d'un flux gazeux transporteur
FR2646250B1 (fr) * 1989-04-20 1992-01-03 Bull Sa Dispositif pour appliquer, sur le support d'enregistrement d'une imprimante non-impact, des particules d'un revelateur pulverulent contenu dans un reservoir
DE4035745A1 (de) * 1989-11-10 1991-05-29 Asahi Optical Co Ltd Tonerruehrarm
DE69213992T2 (de) * 1991-04-16 1997-05-15 Matsushita Electric Ind Co Ltd Elektrofotografisches Verfahren und Gerät
FR2737023B1 (fr) * 1995-07-19 1997-08-22 Nipson Dispositif d'encrage d'un tambour de developpement

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FR2521069A2 (fr) 1983-08-12
JPH0572585B2 (de) 1993-10-12
US4430957A (en) 1984-02-14
DE3362837D1 (en) 1986-05-15
JPS58171067A (ja) 1983-10-07
EP0086683A1 (de) 1983-08-24
FR2521069B2 (de) 1984-03-23

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