EP0077553B1 - Récupération de toner à excès pour un appareil de développement automatique - Google Patents

Récupération de toner à excès pour un appareil de développement automatique Download PDF

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Publication number
EP0077553B1
EP0077553B1 EP19820109586 EP82109586A EP0077553B1 EP 0077553 B1 EP0077553 B1 EP 0077553B1 EP 19820109586 EP19820109586 EP 19820109586 EP 82109586 A EP82109586 A EP 82109586A EP 0077553 B1 EP0077553 B1 EP 0077553B1
Authority
EP
European Patent Office
Prior art keywords
hopper
conveying element
photo
toner
opening
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
EP19820109586
Other languages
German (de)
English (en)
Other versions
EP0077553A3 (en
EP0077553A2 (fr
Inventor
Herbert Albert Tobias
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of EP0077553A2 publication Critical patent/EP0077553A2/fr
Publication of EP0077553A3 publication Critical patent/EP0077553A3/en
Application granted granted Critical
Publication of EP0077553B1 publication Critical patent/EP0077553B1/fr
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
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer

Definitions

  • This invention relates to an apparatus for applying particulate toner to a photo-element and, in particular, to an automatic toning apparatus which includes an arrangement for recovering excess particulate toner.
  • photosensitive tacky surfaced elements are used to define images and, particularly, multicolor images.
  • a photosensitive element is first given an imagewise exposure resulting in the element exhibiting different degrees of tackiness in the exposed and unexposed areas.
  • the latent image is developed by the application of toner particles of a given color to the surface.
  • the photo-element is passed beneath a toning pad where toner particles are embedded into and adhere to the tacky portions of the surface while excess particles from the nonimage areas are brushed away.
  • a tacky photosensitive layer is then laminated on and the process is repeated for various other colors, resulting in a multicolor image on the surface of the photo- element.
  • the excess toner removed from the surface of the photo- element is collected in a tray disposed beneath the hopper and the toning pad.
  • the excess toner so collected is manually recovered by the use of a hoe-like member, which when drawn through the tray moves the toner from the tray into a suitable collection receptacle for re-use.
  • manual recovery of excess toner is time consuming.
  • a recovery means collecting toner particles under the influence of gravity is known from DE-B-1130698.
  • the instant invention relates to an automatic toning apparatus for applying toner particles to a photo-element which comprises a hopper having an opening therein through which toner particles are dispensed onto the surface of a photo- element means for advancing the photo-element along a transport path beneath the opening, a conveying element disposed beneath the opening in the hopper beneath the transport path to collect toner particles falling under the influence of gravity from the opening and adapted to convey the collected particles in a direction transverse to the path of transport to a receptacle disposed in adjacency to the end of the conveying element.
  • the conveying element preferably takes the form of a continuous belt conveyor disposed within a trough mounted beneath the opening and adjacent to the edge of the toning pad.
  • Figure 1 is a stylized pictorial representation of a side elevational view of an automatic toning apparatus generally indicated by reference character 10.
  • a plurality of toning modules 12 each of which is adapted to automatically tone a photo-element (not shown in Figure 1) with a particulate toner.
  • the apparatus 10 shown in Figure 1 is sized to accommodate four toner modules, 12Y, 12M, 12C and 12B, respectively provided for the application of yellow, magenta, cyan and black toner particles to the photo-element.
  • Each module 12 is suitably mounted within a casing or housing 14 formed of a front wall 14F, a rear wall 14R, a top wall 14T, a bottom wall 14B and a pair of opposed side support frames 14S.
  • Sidewalls 14D (shown in Figures 8 through 10) are attached between the top and bottom walls of the casing 14.
  • the sidewalls 14D are provided with doors which afford access to the ends of the modules 12.
  • Each side support frame 14S is provided with cutout portions 15 configured to correspond to the shape of each module 12 to thereby assist in supporting the same within the apparatus 10.
  • Each module 12 is disposed within the casing 14 intermediate a pair of inlet feed rolls 16A and 16B and outlet feed rolls 18A and 18B.
  • the rolls 16 and 18 are each driven by a suitable drive arranged within the casing 14 in any convenient manner.
  • the shafts of each of the inlet feed rolls 16B and each of the outlet feed rolls 18B extend beyond the side support frames 14S.
  • the outlet feed rolls 18B are interconnected in a driven relationship by a chain and sprocket drive from a suitable drive motor (not shown).
  • Each inlet feed roll 16B is driven by a chain drive derived from its associated outlet feed roll 18B.
  • the modules 12 are mounted in a pyramidal configuration although any convenient configuration may be used.
  • the photo-element P (not shown in Figure 1) is introduced through an appropriate slot 20Y, 20M, 20C and 20B in the front wall 14F of the apparatus 10 on an associated inlet feed tray 22.
  • the tray 22 may be removably mounted to the front wall 14F.
  • the toned photo-element is driven by the outlet feed rolls 18 along an outlet tray 24 and exits the casing 14 through associated outlet openings 26Y, 26M, 26C and 26B.
  • the front wall 14F of the casing 14 may be removably mounted to provide access to the interior of the apparatus 10.
  • Each module 12 is preferably transversely slidably receivable within the casing 14 on a suitable support member 28.
  • the support member 28 may take the form of an inverted T shaped bracket which extends transversely across the interior of the casing 14.
  • each end of each module 12 projects through the cutout 15 provided in the side support frames 14S to support the module 12 in the casing 14.
  • one end of the module 12 is clipped to pins 30 integral with one of the side support frames 14S to secure the module 12 in place.
  • each toning module 12 includes a hopper 32 (only the lowermost portion of which is illustrated for clarity) which receives a charge of particulate toner of the appropriate color therein.
  • the hopper 32 is formed by the cooperative association of a front wall member 32F and a rear wall member 32R. The lateral ends of the hopper 32 are closed the overlap of rearwardly extending plates (not shown) integral with the front wall 32F and forwardly extending plates (not shown) integral with the rear wall 32R. A suitable seal closes the space between the parallel plates.
  • a brace bar 33 is secured to the front wall 32F for a purpose discussed herein.
  • the hopper 32 tapers to an opening or throat 34 through which particulate toner exits the hopper 32.
  • the throat 34 communicates with a path of transport, generally indicated at 35, along which the photo-element P is conveyed in a direction 36 through the module 12.
  • a toning pad support plate 37 is attached to the rear wall 32R of the hopper 32.
  • the plate 37 is supported by a suitable brace plate 37B.
  • the portion of the front wall 32F upstream of the throat 34 is provided with a pile fabric 38.
  • the rear wall 32R of the hopper 32 and the support plate 37 downstream of the throat 34 are provided with a pile fabric 39 which, together with the plate 37, defines a toning pad generally indicated by reference character 40.
  • the fabric 39 extends upwardly along the rear wall 32R of the hopper 32 as shown in Figure 2.
  • the rear wall 32R and the pad support plate 37 in each module 12 are able to be laterally oscillated in a direction transverse to the direction of transport 36 with respect to the front wall 32F of the hopper by a suitable oscillator arrangement 41 ( Figures 6 and 7) supported by the side support frame 14S of the casing 14.
  • a coupling is made with the oscillator arrangement 41 to connect the rear wall 32R in a driven relationship therewith.
  • the support plate 37 may be separate from the rear wall 32R of the hopper 32. In this event the pad 40 attached to these members is separated and separate oscillators are provided to reciprocate both the rear wall 32R and the plate 37 in directions transverse to the direction of transport 36.
  • the oscillating arrangement 41 for each of the modules 12 disposed within the casing 14, as well as a detailed view of the interconnection of the oscillating arrangement 41 with one of the modules 12 are seen in Figures 6 and 7.
  • the oscillating arrangement 41 includes an oscillator drive motor 42 connected to an electric clutch 43 associated with each module 12 by a timing belt 44.
  • the timing belt 44 which extends between a T-pulley 45A mounted to the shaft of the motor 42 and a T-pulley 45B connected to each clutch 43.
  • Suitable for use as the drive motor 42 is a 1/4 HP capacitor motor, 1725 RPM, 115/208/230 VAC, Nema 48 frame, resilient mount, manufactured by Dayton Electric Company and sold under catalogue number 6K438.
  • the timing belt 44 may be a dual grip timing belt such as that manufactured by Maurey Mfg. Company and sold under model number D660L050.
  • the clutch 43 such as a device manufactured by Electroid Company, division of Valcor Engineering Corp. and sold under model number SEC-26C-10, Coil 1, Style L, is supported by a bearing 47 mounted in a plate 48.
  • Suitable for use as the bearing 47 is a two-bolt pressed steel flange bearing device manufactured by Fafnir Bearing Company and sold under catalogue number RAT-5/8.
  • the plate 48 is attached by a bracket 49 to the side support frame 14S of the casing 14. Suitable T-pulleys may be obtained from Maurey Mfg.
  • the motor 42 is connectable by the action of the clutch 43 into a driving relationship with an oscillator device 50 such as that sold by Norco Ltd. under model number 802626-14 with 1/4-28 tapped hole for alemite fitting. It is to be understood that any suitable motor, belt, pulleys, bearing, clutch and oscillator may be used and remain within the contemplation of the present invention.
  • a bracket 51 is affixed to the oscillator device 50.
  • the bracket 51 is slidable over a bearing block 52 mounted to the side support frame 14S.
  • the end of the bracket 51 is pinned by a pin 53 to a hinge block 54 connected to the movable portion of the hopper 32 (i.e., the rear wall 32R in the embodiment shown in Figure 2).
  • the pin 53 is held in position by a retaining spring 55.
  • a hinge pin 56 is provided for quickly connecting and disconnecting the rear wall 32R of the hopper 32 from the oscillating arrangement 41.
  • rotary motion derived from the motor 42 is converted to reciprocating rectilinear motion (in the direction of arrows 57).
  • the rectilinear motion is imparted to the rear wall 32R of the hopper 32 to thereby reciprocate the rear wall 32R and the plate 37 in directions transverse to the direction of transport 36 of the photo-element P through the module 12.
  • a channel-shaped tray or trough 58 is formed by a suitably configured plate 59 closed at each lateral end by a sidewall 60A and 60B ( Figure 3) to which the plate 59 is connected, as by welding.
  • the bottom edges of the sidewalls 60 are notched, as at 60N, to engage the inverted T-shaped bracket 28 to support the module 12 as it is inserted into the apparatus 10.
  • the trough 58 exhibits an open top.
  • the plate portion 59 of the trough 58 is supported by transversely extending cross-ties 61 ( Figure 2).
  • the forward edge of the trough 58 is bent downwardly, as at 63, and in cooperation with the exterior of the upstream portion of the front wall 32F of the hopper 32, define a lead-in for the photo-element P.
  • the brace bar 33 attached to the front wall 32F of the hopper 32 is secured to the sidewalls 60 of the trough 58 by bolts (not shown) to thereby interconnect the hopper 32 to the trough 58.
  • a shelf member 64 in the form of an inverted channel is mounted as by welding at each lateral end to the interior of the sidewalls 60 of the trough 58.
  • the shelf 64 extends transversely across the interior of the trough 58 and lies beneath the toning pad 40.
  • the back surface 65 of the channel-shaped shelf 64 defines a toning support table against which the toning pad 40 acts to embed particulate toner into the surface of the photo-element.
  • a first elongated member 68 ( Figure 2) is attached, as by bolts 70, to the downstream leg of the channel-shaped shelf member 64.
  • a second elongated member 72 is affixed as by bolts 74 to the inside surface of the upwardly extending leg of the channel-shaped trough 58.
  • the upper surfaces of the members 68 and 72 are provided with stiff upstanding bristles 76 and 78, respectively.
  • the bristles 76 and 78 act to scrape particulate toner from the support side of the photo-element P and the toning pad 40 disposed thereabove.
  • the toner falls through an opening 80 defined by the members 68 and 72 into the interior volume of the channel-shaped trough 58.
  • a conveyor guide frame assembly 84 extends transversely across the interior of the trough 58 beneath both the throat 34 and the upstream edge of the shelf member 64.
  • the frame guide 84 is substantially H-shaped and is formed from sidewall members 86A and 86B joined by an inverted channel shaped cross member 86C. If desired, the guide frame assembly may be integrally formed, as by extruding.
  • the upper surface of the cross member 86C forms an upper planar guide surface 86G for a conveying element 134, such as a belt conveyor 136, as discussed herein.
  • the lower ends of the sidewalls 86A and 86B are bent inwardly toward each other, as at 87, to define a lower guide for the belt conveying surface.
  • Each lateral end of the guide frame assembly 84 is respectively provided with a mounting bracket arrangement 88 and 89.
  • the brackets 88 and 89 are respectively formed of a pair of opposed plate-like members 88A and 88B and 89A and 89B secured to the sidewalls of the guide frame assembly 84 at the appropriate ends thereof by suitable mounting bolts 90.
  • the brackets 88A and 88B rest against the bottom of the trough 58.
  • Each of the brackets 88 is provided with an aperture 92 which receives the shaft 94 of a roller 96.
  • the roller 96 is confined between the sidewalls of the guide frame 84.
  • Each of the brackets 89A and 89B is provided with an aperture 98.
  • the apertures 98 are surrounded by an annular collar 100 for a purpose discussed herein.
  • the collar has an aperture 102 therein.
  • a drive mounting adapter generally indicated by reference numeral 104 is connected to the sidewall 60B of the trough 58.
  • the adapter 104 includes a planar base portion 106 from which projects an upstanding hood member 108 (in the shape of an inverted channel).
  • the adapter 104 is secured to the sidewall 60B by bolts 110 extending thereinto through the planar base 106.
  • Each downwardly depending arm 112A and 112B ( Figure 4) of the hood member 108 has an opening 114 therein which registers with the apertures 98 and 102 provided in the corresponding brackets 89 and collars 100, respectively.
  • a bearing shaft 116 extends through the registered apertures 98, 102 and openings 114.
  • the shaft 116 carries a roller 118 confined between the sidewalls of the frame 84.
  • the shaft 116 is pinned, as at 120 and 121 and extends past the arm 112B where it is mounted to a pinnion 122.
  • the pinnion 122 is mounted on the centerline of the inlet feed rollers 16 ( Figure 1).
  • the pinnion 122 is engaged by a helical gear 124 ( Figure 4).
  • the gear 124 is driven by the same drive that rotates the inlet feed ro!ls 16 of the module.
  • the rotation of the helical gear 124 drives the shaft 116 which, in turn, drives the roller 118.
  • Upstanding posts 126 are mounted to the base portion 106 of the mounting adapter 108.
  • the posts 126 receive side fasteners 128 which clip the module 12 to the pins 30 formed on the side support frame 14S of the casing.
  • the upper edges of the hood 108 are provided with tabs 130 by which a suitable receptacle or pail 132 may be mounted adjacent to the end of the trough 58 ( Figure 5).
  • a conveying element 134 for conveying excess toner collected into the trough 58 is provided.
  • the conveying element 134 takes the form of a belt conveyor 136 (shown in section in Figures 2, 4 and 5) trained over the rollers 96 and 118.
  • the helical gear 124 is driven at a speed functionally related thereto. Excess toner material falling under the influence of gravity from the opening in the hopper or from the pad 40 is collected on the belt conveyor 136.
  • the belt conveyor 136 moves in a direction substantially transversely to the path of transport 36 of the photo-element P.
  • the excess toner material collected on the belt conveyor 136 is deposited into the receptacle 132. In this manner excess particulate toner material is withdrawn from the toning module.
  • th conveying element 134 takes the form of a sprocket and chain arrangement 140 carried in the trough 58.
  • the conveying element 134 takes the form of an auger 142 driven by a suitable drive element 144.
  • the auger 142 rotates within the trough 58 to displace toner collected therein toward the receptacle 132.
  • a chute and vibrator arrangement 146 is disposed to vibrate the chute to move the collected toner toward the receptacle 132.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Dry Development In Electrophotography (AREA)
  • Photographic Developing Apparatuses (AREA)

Claims (8)

1. Appareil pour l'application de particules de toner à un photoélément, comprenant:
une tréime présentant une ouverture à travers laquelle des particules de toner sont distribuées sur la surface d'un photoélément; des moyens pour faire avancer le photoélément le long d'un trajet de transport situé en dessous de l'ouverture; caractérisé par un élément de transport (136, 134, 142) disposé en dessous de l'ouverture (34) de la trémie et en dessous du trajet de transport (35), l'élément de transport étant disposé pour recueillir des particules de toner tombant par l'ouverture sous l'influence de la gravité et conçu pour transporter les particules de toner recueillies dessus dans une direction transversale par rapport au trajet de transport, jusqu'à un réceptacle (132) disposé au voisinage de l'extrémité de l'élément de transport pour recevoir des particules de toner de la surface.
2. Appareil selon la revendication 1, dans lequel l'élément de transport comprend un transporteur à courroie (136).
3. Appareil selon la revendication 2, dans lequel la vitesse du transporteur à courroie est liée fonctionnellement à la vitesse à laquelle on fait avancer le photoélément en dessous de l'ouverture.
4. Appareil selon la revendication 1, comprenant en outre un patin vibrant à toner (37) disposé en aval de la trémie (32), et dans lequel l'élément de transport est disposé en dessous d'au moins le bord du patin qui est adjacent à la trémie.
5. Appareil selon la revendication 4, dans lequel la trémie comprend une paroi antérieure (32F) et une paroi postérieure (32R), la paroi postérieure pouvant être mise en vibration relativement à la paroi antérieure, et dans lequel le patin vibrant à toner (37) est attaché à la paroi postérieure.
6. Appareil selon la revendication 1, dans lequel l'élément de transport comprend un transporteur à chaîne (140).
7. Appareil selon la revendication 1, dans lequel l'élément de transport comprend une vis (142).
8. Appareil selon la revendication 1, dans lequel l'élément de transport comprend un couloir vibrant.
EP19820109586 1981-10-20 1982-10-16 Récupération de toner à excès pour un appareil de développement automatique Expired EP0077553B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US31336481A 1981-10-20 1981-10-20
US313364 1981-10-20

Publications (3)

Publication Number Publication Date
EP0077553A2 EP0077553A2 (fr) 1983-04-27
EP0077553A3 EP0077553A3 (en) 1983-08-31
EP0077553B1 true EP0077553B1 (fr) 1985-09-04

Family

ID=23215423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820109586 Expired EP0077553B1 (fr) 1981-10-20 1982-10-16 Récupération de toner à excès pour un appareil de développement automatique

Country Status (3)

Country Link
EP (1) EP0077553B1 (fr)
JP (1) JPS5886545A (fr)
DE (1) DE3266051D1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1130698B (de) * 1956-03-28 1962-05-30 Zindler Lumoprint Kg Vorrichtung zum Herstellen von Kopien mit einem eine fotoleitende Schicht aufweisenden Schichttraegerband
US3038442A (en) * 1958-12-29 1962-06-12 Burroughs Corp Electrostatic developing apparatus
JPS5077042A (fr) * 1973-11-07 1975-06-24
DE2838617A1 (de) * 1978-09-05 1980-03-13 Bayer Ag Verfahren zur verfestigung von wattebaendern zur tampon-herstellung aus synthesefasern
CA1141814A (fr) * 1979-03-30 1983-02-22 Shinichi Mizuguchi Appareil photographique electronique

Also Published As

Publication number Publication date
EP0077553A3 (en) 1983-08-31
EP0077553A2 (fr) 1983-04-27
DE3266051D1 (en) 1985-10-10
JPS5886545A (ja) 1983-05-24

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