EP0486972B1 - Bilderzeugungsgerät - Google Patents

Bilderzeugungsgerät Download PDF

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Publication number
EP0486972B1
EP0486972B1 EP19910119558 EP91119558A EP0486972B1 EP 0486972 B1 EP0486972 B1 EP 0486972B1 EP 19910119558 EP19910119558 EP 19910119558 EP 91119558 A EP91119558 A EP 91119558A EP 0486972 B1 EP0486972 B1 EP 0486972B1
Authority
EP
European Patent Office
Prior art keywords
paper
tray
image
discharging
stocking
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 - Lifetime
Application number
EP19910119558
Other languages
English (en)
French (fr)
Other versions
EP0486972A2 (de
EP0486972A3 (en
Inventor
Masahiko Nakao
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.)
Kyocera Mita Industrial Co Ltd
Original Assignee
Mita Industrial Co Ltd
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 Mita Industrial Co Ltd filed Critical Mita Industrial Co Ltd
Publication of EP0486972A2 publication Critical patent/EP0486972A2/de
Publication of EP0486972A3 publication Critical patent/EP0486972A3/en
Application granted granted Critical
Publication of EP0486972B1 publication Critical patent/EP0486972B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6552—Means for discharging uncollated sheet copy material, e.g. discharging rollers, exit trays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00—Pile receivers
    • B65H31/02—Pile receivers with stationary end support against which pile accumulates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H85/00—Recirculating articles, i.e. feeding each article to, and delivering it from, the same machine work-station more than once
    • 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
    • G03G15/23—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 specially adapted for copying both sides of an original or for copying on both sides of a recording or image-receiving material
    • G03G15/231—Arrangements for copying on both sides of a recording or image-receiving material
    • G03G15/232—Arrangements for copying on both sides of a recording or image-receiving material using a single reusable electrographic recording member
    • G03G15/234—Arrangements for copying on both sides of a recording or image-receiving material using a single reusable electrographic recording member by inverting and refeeding the image receiving material with an image on one face to the recording member to transfer a second image on its second face, e.g. by using a duplex tray; Details of duplex trays or inverters
    • 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
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6555—Handling of sheet copy material taking place in a specific part of the copy material feeding path
    • G03G15/6573—Feeding path after the fixing point and up to the discharge tray or the finisher, e.g. special treatment of copy material to compensate for effects from the fixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/421—Forming a pile
    • B65H2301/4212—Forming a pile of articles substantially horizontal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/40—Movement
    • B65H2513/42—Route, path
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00417—Post-fixing device
    • G03G2215/00421—Discharging tray, e.g. devices stabilising the quality of the copy medium, postfixing-treatment, inverting, sorting
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00417—Post-fixing device
    • G03G2215/0043—Refeeding path
    • G03G2215/00434—Refeeding tray or cassette
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00443—Copy medium
    • G03G2215/00447—Plural types handled
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/0054—Detachable element of feed path

Definitions

  • the present invention relates to an image-forming apparatus for achieving complex image structures such as an overlapped formation of manuscript images on one side of a paper and a formation of an image on both sides of said paper.
  • This image-forming apparatus comprises an image-forming apparatus body provided with an intermediate tray, a paper-discharging device provided with a plurality of paper-discharging portions and paper-discharging guides that can be switched over to a posture allowing the paper to go toward the downstream side in the respective paper-discharging portions other than a paper-discharging portion on the final end of a paper-discharging course.
  • This known apparatus is further equipped with a paper-resupplying device arranged on the downstream side of said paper-supplying cassette, which is inserted and can be extracted from the front side of said body, and a paper-discharging tray for discharging the paper, on which an image has been formed, housed in the image-forming apparatus body.
  • the paper-supplying cassette for supplying the paper, on which an image is to be formed, and said paper-discharging tray for discharging the paper, on which said image has been formed, are arranged within said apparatus with the advantage that the body has no projection and thus smaller overall circumference dimensions, with the result that a reduced space is required for installing.
  • an image-forming apparatus comprising an image-forming apparatus body and a paper-housing device, which can be inserted into and extracted from said image-forming apparatus body, a tray for stocking paper on which an image has been formed, a paper-discharging device provided with a plurality of paper-discharging portions for discharging said paper to said tray and a paper-resupplying device arranged on the downstream side of said paper-discharging device for resupplying the paper stocked in the tray housed in said image-forming apparatus body is characterized in that the tray serving for both, i.e.
  • tray being composed of a first paper-stocking portion and a second paper-stocking portion separated from each other, such that at least a trailing end portion of the paper, which has been subjected to a final copying process is housed on said first paper-stocking portion, whereas a front end side portion of the paper to be resupplied being deposited on said second paper-stocking portion.
  • the paper to be resupplied is housed in the tray under the condition that it arrives at the paper-resupplying means in the paper-resupplying device in the same manner as in a conventional image-forming apparatus of this kind.
  • the tray serves at the intermediate tray according to the prior art.
  • the paper on which the complex image has been formed, and the paper for use in the usual image formation are discharged on the tray through said branching guide but the paper, on which a specific image has been formed, is positioned within the tray under the condition that it does not arrive at the paper-resupplying means even though the paper, on which an image is to be formed, has a maximum size.
  • the tray serves as the paper-discharging tray according to the prior art.
  • Figs. 2, 3 show an electrostatic photographic copying machine as one example of an image-forming apparatus according to the present invention.
  • reference numeral 1 designates a copying machine body provided with a manuscript-carrying table 2 and a manuscript-weight 3 on an upper surface portion thereof.
  • Said copying machine body 1 contains a drum photoreceptor 4 rotating in the direction of an arrow R (in Fig. 2 laid crossways), a charging device 5, developing devices 6, 7, a transfer device 8, a paper-separating device 9, a cleaning device 10 and the like arranged at appointed positions around said photoreceptor 4 in the order described along said rotation direction R and an optical system movement-type exposing device 11 arranged in a space there-above.
  • reference numeral 12 designates a deelectrifying device.
  • the copying machine body 1 is provided with a supplied paper conveying device 14 for conveying a paper P housed in a cassette 13 adapted to be inserted and extracted from a front side toward said transfer device 8 and a discharge paper-conveying device 16 for conveying said paper P, which has been transferred and separated, toward a fixing device 15.
  • a supplied paper conveying device 14 for conveying a paper P housed in a cassette 13 adapted to be inserted and extracted from a front side toward said transfer device 8 and a discharge paper-conveying device 16 for conveying said paper P, which has been transferred and separated, toward a fixing device 15.
  • a stocking course 18 for guiding the paper P, which has been fixed, toward a paper-discharging device 17 (its construction will be mentioned later) and a switch-back course 19 for switching back and guiding the paper P toward said paper-discharging device 17 are arranged on the downstream side of said fixing device 15.
  • Reference numeral 20 designates a first course-switching over member provided in a branching portion of said both courses 18, 19.
  • Reference numerals 21, 22 designate a second course-switching over member and a pair of conveying rollers provided in said switch-back course 19, respectively.
  • reference numeral 23 designates a tray (its construction will be mentioned later) provided below said paper-discharging device 17 for receiving the paper P discharged from the paper-discharging device 17 to house it in a certain state.
  • Reference numeral 24 designates a paper-resupplying device provided on the downstream side of said tray for jointly supplying the paper P to said supplied paper-conveying device 14 in an appointed timing and reference numeral 25 designates paper-resupplying rollers as paper-resupplying means.
  • a complex image is to be formed on said paper P, that is on the one hand manuscript images are to be formed overlappedly on one side or an image is to be formed on both sides on the other hand.
  • Reference numeral 26 designates a width-keeping mechanism for keeping the papers P stocked on the tray 23 in uniform width.
  • PS designates a paper-stopper.
  • the paper-discharging device 17 is provided with three pairs of paper-discharging rollers 27, 28, 29, each comprising an upper roller and a lower roller mounted on a pair of frames (an upper frame and a lower frame) (not shown) at a suitable interval, paper-guiding members 30, 31 arranged between the respective paper-discharging rollers 27, 28, 29, paper-discharging portions 32, 33 arranged immediately downstream of the pair of paper-discharging rollers 27 and the pair of paper-discharging rollers 28, respectively.
  • Paper-discharging guides 34, 35 are pivotably mounted immediately downstream of said paper-discharging portions 32, 33, respectively, and a guide member 37 is arranged in a paper-discharging portion 36 composed of the pair of paper-discharging rollers 29 on the downstream side for guiding the paper P downward.
  • Said paper-discharging guides 34, 35 can be changed over to a paper-discharging posture for discharging the paper P into the tray 23 crossing a paper-discharging course and a posture for retreating from said paper-discharging course to let the paper P go toward the downstream side.
  • a paper P1 of large size having a relatively large length in the conveying direction is guided toward the tray 23 by giving said paper-discharging posture to the paper-discharging guide 34 on the downstream side of the pair of rollers 27, as shown in Fig.
  • a paper P2 of middle size is guided toward the tray 23 by giving the paper-discharging posture merely to the paper-discharging guide 35 on the downstream side of the pair of paper-discharging rollers 28 positioned midway, as shown in Fig. 5.
  • a paper P3 of small size is guided toward the tray 23 from said paper-discharging portion 31 composed of said pair of paper-discharging rollers 29 on the downstream side by changing-over the two paper-discharging guides 34, 35 to said posture for letting the paper go toward the downstream side, as shown in Fig. 6.
  • the papers P1, P2, P3 guided onto the tray 23 through the paper-discharging portions 32, 33, 36, respectively, are uniformly kept in width by means of said width-keeping mechanism 26 regardless of the widths thereof and housed such that the front ends thereof abut against said paper-stopper PS.
  • a branching guide 38 is provided on the upstream side of the paper-discharging portion 32 for branching the paper P1 of large size in the direction toward the tray 23. Said branching guide 38, as becomes obvious from the later description, is used for changing-over to a temporary stocking of the paper P within the tray 23 midway between the copying operations and a stocking of the paper P subjected to a final copying step when the paper is copied a plurality of times.
  • a pair of paper-discharging rollers 39 composed of an upper paper-discharging roller and a lower paper-discharging roller are mounted on said pair of frames (said upper frame and said lower frame) in the vicinity of a confluence of the stocking course 18 and the switch-back course 19 on the downstream side of said confluence.
  • Paper-guiding members 40, 41 are arranged between said pair of paper-discharging rollers 39 and the pair of paper-discharging rollers 27.
  • a paper-discharging portion 42 is provided at the immediate downstream side of said pair of paper-discharging rollers 39, and the branching guide 38 is arranged at the downstream portion of said paper-discharging portion 42.
  • the position of the branching guide 38 is set so that a front end of the paper P1 does not arrive at the paper-resupplying roller 25, preferably said front end of the paper P1 should not reach to the end portion on the downstream side of a paper-keeping side plate 43 of the width-keeping mechanism 26, when the paper of maximum size (for example the paper P1), on which an image is to be formed by the electrostatic photographic copying machine, is guided toward the tray 23 and deposited there, as shown in Fig. 7.
  • the papers P2, P3 shorter than the paper P1 are guided to the branching guide 38 and then housed on the tray 23, as shown in Fig. 8 and Fig. 9, respectively.
  • the tray 23 is divided into a first paper-stocking portion 44 for housing all of the papers P subjected to the final copying step or a major part thereof including their rear end, and a second paper-stocking portion 45 for housing a front end part of the paper P to be resupplied.
  • Said first paper-stocking portion 44 comprises a first inclined tray portion 46 inclined so as to be slightly lower than the upstream side (the left side in Fig. 1), and having a longer extensional area and a second inclined tray portion 47 inclined so as to be lower than on the downstream side, being shorter and having a smaller area connected with said first inclined tray portion 46.
  • Said paper-stocking portion 45 is separated from said second inclined tray portion 47 on the downstream side of the second inclined tray portion 47 and is positioned below the paper-keeping side plate 43 of the width-keeping mechanism 26.
  • Tray guide members 48, 49 are arranged crossways in the direction vertical to the paper surface within the image-forming apparatus body 1 while the members 52, 53 to be guided and engaged with said tray guide members 48, 49 are provided on the outer side of a side plate 50 on the upstream side of the first inclined tray portion 46 of the first paper-stocking portion 44 and on the back side of a downwardly bent portion 51 of the second inclined tray portion 47, respectively, so that the first paper-stocking portion 44 can be separately moved from the second paper-stocking portion 45 and can be inserted and extracted from the front side of the image-forming apparatus body 1 (see Fig. 3).
  • the paper P to be resupplied or the paper P subjected to the final copying step is housed on the tray 23 having the above-described construction in the following manner.
  • the paper P to be resupplied is housed so as to extend over the first paper-stocking portion 44 and the second paper-stocking portion 45 except for paper of remarkably small size. That is to say, the paper P1 of large size is housed on the tray 23 so as to be engaged by the paper-stopper PS at the front end portion thereof and supported by the second paper-stocking portion 45 at a rear end portion thereof, as shown in Fig. 4.
  • Paper P2 of middle size and paper P3 of small size are housed on the tray 23 as shown in Fig. 5 and Fig. 6, respectively.
  • a paper P subjected to a final copying step is housed merely on the first paper-stocking portion 44 excluding one of relatively large size (for example the paper P1). That is to say, the paper P1 of large size is deposited on the tray 23 so as to be engaged by said side plate 50 on the upstream side of the first inclined tray portion 46 at a rear end B thereof and held by the second paper-stocking portion 45 at said front end portion thereof. And, the paper P2 of middle size and the paper P3 of small size are housed on the tray 23 so as to be held by the first paper-stocking portion 44 as shown in Fig. 8 and Fig. 9, respectively.
  • the branching guide 38 Since a manuscript image is usually formed on one side of a paper P merely one time in most cases, the branching guide 38 is held under the condition shown by full line in Fig. 1. Further, it is assumed that the first course-changing over member 20 and the branching guide 38 are changed-over to positions shown by full lines in Fig. 1.
  • the manuscript is placed on said manuscript-carrying table 2 and covered with said manuscript weight 3 and then upon pushing down a copy key in an operation display portion 54 (refer to Fig. 3) provided on an upper surface of the image-forming apparatus body 1, said exposing device 11 exposes and scans the manuscript and at the same time the papers P are sent out toward said transfer device 8 from said paper supplying cassette 13 in an appointed timing.
  • An electrostatic latent image is formed on the photoreceptor 4 on the basis of said exposure scanning and the formed electrostatic latent image is turned into a toner image by said developing device 6. Said toner image is transferred onto the paper P in the transfer device 8.
  • the paper P then passes the fixing device 15 by action of said discharged paper-conveying device 16 to achieve a fixing of the toner image within a predetermined timing.
  • the paper P which has been fixed is guided to the stocking course 18 by the first course-changing over member 20 to arrive at the paper-discharging device 17, where it is introduced into the tray 23 through the paper-discharging portion 42 by means of the branching guide 38.
  • the paper is housed on the main tray portion 46 on the upstream side of the main tray 23 under the condition that the image-forming surface is faced down.
  • the branching guide 38 is arranged on the upstream side of the paper-discharging portion 32 for branching the paper of maximum size, on which an image is to be formed, toward the tray 23 and positioned so that its front end may not arrive at the paper-resupplying rollers 25, so that the front end of the paper P does not arrive at the paper-resupplying rollers 25 even though the paper P arriving at the tray 23 through the paper-discharging portion 42 may not only be small-sized but also large-sized (refer to Figs. 7 to 9).
  • the paper P which has been copied and fixed, is stocked on the tray 23, and a copy can be taken out by extracting the main tray portion 44 of the tray 23 to the front side of the image-forming apparatus body 1, as shown in Fig. 3.
  • the taking out of paper which has been copied with facing down or up image may be selected by operating the selection key in said operation display portion 54.
  • the paper P which has been subjected to the appointed fixing treatment in the first image formation is housed on the tray 23 under the condition that its image faces down, so that the first course-changing over member 20 is held under the state shown by a full line in Fig. 1 and the branching guide 38 is held under the state shown by an imaginary line in Fig. 1.
  • the paper-discharging guides 34, 35 are suitably changed over depending upon the size (large, middle, small) of the paper P but now, provided that the manuscript image is overlappedly formed on one side of the paper P of large size, the paper-discharging guide 34 is held under the state shown by said full line in Fig. 1.
  • the manuscript Upon operating said copy key under this state, the manuscript is exposed to form an electrostatic latent image on the photoreceptor 4 in the same manner as above described but this electrostatic latent image is first developed by the developing device 6. Then, the paper P1 which has been subjected to the appointed transfer and fixing treatments, is guided to the stocking course 18 by means of the first course-changing over member 20 to arrive at the paper-discharging device 17, where it passes through the branching guide 38 to be introduced into the tray 23 through the paper-discharging portion 32 by means of the paper-discharging guide 34.
  • the first course-changing over member 20 and the branching guide 38 are changed over to a position shown by full line in Fig. 1 and an electrostatic latent image is formed on the photoreceptor 4 in the same manner as above described but this time the electrostatic latent image is developed by the other developing device 7.
  • the paper P1 which has been subjected to said transfer and fixing treatments, is guided to the stocking course 18 by means of the first course-changing over member 20 to arrive at the paper-discharging device 17 where it is introduced into the tray 23 through the paper-discharging portion 42 by means of the branching guide 38. In this case, it is housed on the tray 23 so as to extend over the first paper-stocking portion 44 and the second paper-stocking portion 45 of the tray 23 with its image facing down, as shown in Fig. 7.
  • a fixed guide 55 may be provided above the first inclined tray portion 46.
  • a paper P' which has been subjected to the final copying step can be separately housed so as to go under a paper P'' to be resupplied, as shown in Fig. 10.
  • first paper-stocking portion 44 can be inserted and extracted from the front side of the image-forming apparatus body 1
  • second paper-stocking portion 45 may be adapted to be inserted and extracted from the front side of the image-forming apparatus body 1 in a similar manner.
  • the present invention it is sufficient that merely one tray serves not only as the intermediate tray for temporary deposition of the paper but also as the paper-discharging tray for housing the paper on which an appointed image has been formed.
  • the conventional intermediate tray is used also as the paper-discharging tray, so that the installing structure of the tray becomes more simple and the required space in height direction for an extra tray becomes unnecessary with the result that an image-forming apparatus according to the invention has a remarkably smaller and compact size.
  • the tray housed in the image-forming apparatus body is divided into the first paper-stocking portion for stocking the paper, which has been subjected to the final copying step, and the second paper-stocking portion for stocking the paper to be resupplied, so that the first paper-stocking portion can be simply extracted from for example the front side of the image-forming apparatus body without any hindrance to other members, for example the paper-resupplying rollers.
  • the paper which has been subjected to the final copying can be simply taken out by means of a handy tray which can be used very easily.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Pile Receivers (AREA)
  • Conveyance By Endless Belt Conveyors (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Electrophotography Configuration And Component (AREA)
  • Counters In Electrophotography And Two-Sided Copying (AREA)

Claims (16)

  1. Bilderzeugungsgerät mit einem Gerätegehäuse (1), einem in das Gerätegehäuse einsetzbaren und aus diesem herausziehbaren Papiervorratsbehälter (13), einer Ablage (23) zum Lagern von Papier, auf dem ein Bild erzeugt worden ist, einer Papierausgabevorrichtung (17) mit einer Mehrzahl von Papierausgabebereichen (32,33,36) zum Ausgeben des Papiers auf der Ablage, und mit einer an der stromab von der Papierausgabevorrichtung gelegenen Seite angeordneten Papierrückführvorrichtung (24) zum erneuten Zuführen des auf der im Gerätegehäuse vorhandenen Ablage lagernden Papiers, dadurch gekennzeichnet, daß die Ablage (23) sowohl als Zwischenablage zum temporären Lagern des Papiers (P) zwischen den Kopiervorgängen, wenn das Papier mehrmals bedruckt wird, als auch als Papierausgabeablage zum Lagern des Papiers nach einem letzten Kopiervorgang dient und an der stromauf von der Papierrückführvorrichtung (24) gelegenen Seite angeordnet ist, wobei die Ablage (23) einen ersten Papierlagerbereich (44) und einen zweiten Papierlagerbereich (45) aufweist, die so voneinander getrennt sind, daß mindestens ein Endbereich eines einem letzten Kopiervorgang unterzogenen Papiers (P) auf dem ersten Papierlagerbereich (44) aufliegt, während ein Führungsbereich eines erneut zuzuführenden Papiers auf dem zweiten Papierlagerbereich (45) aufliegt.
  2. Bilderzeugungsgerät nach Anspruch 1, dadurch gekennzeichnet, daß der erste Papierlagerbereich (44) zum Tragen einer größeren Fläche des kopierten Papiers einen langen geneigten Ablagebereich (46) aufweist, der so geneigt ist, daß er an seiner stromauf gelegenen Seite niedriger ist.
  3. Bildcrzeugungsgerät nach Anspruch 1, dadurch gekennzeichnet, daß der erste Papierlagerbereich (44) einen ersten langen geneigten Ablagebereich (46) aufweist, der so geneigt ist, daß er auf seiner stromauf gelegenen Seite niedriger ist, sowie einen zweiten kurzen geneigten Ablagebereich (47) mit einem kürzeren Bereich als dem des ersten geneigten Ablagebereichs, welcher Bereich an der an seiner stromab gelegenen Seite niedriger ist und mit dem ersten geneigten Ablagebereich verbunden ist, und daß der zweite Papierlagerbereich (45) an der stromab von dem zweiten geneigten Ablagebereich (47) gelegenen Seite und von diesem getrennt angeordnet ist.
  4. Bilderzeugungsgerät nach Anspruch 3, dadurch gekennzeichnet, daß innerhalb des Gerätegehäuses (1) Ablagenführungen (48,49) quer angeordnet sind, und daß von den Ablagenführungen zu führende und mit diesen im Eingriff stehende Teile (52, 53) an beiden Seiten des ersten Papierlagerbereichs (44) vorgesehen sind, so daß der erste Papierlagerbereich (44) von dem zweiten Papierlagerbereich (45) zum Einsetzen und Herausziehen an der Vorderseite des Gerätegehäuses (1) getrennt werden kann.
  5. Bilderzeugungsgerät nach Anspruch 1, dadurch gekennzeichnet, daß die Papierausgabevorrichtung (17) eine an der stromauf von dem Papierausgabebereich angeordnete Abzweigführung (38) aufweist, zum Abzweigen des eine Kopie tragenden Papiers (P₁) mit dem größten Format zu der Ablage (23) und zum Positionieren des Papiers (P₁), so daß dessen auf der Ablage aufliegende Vorderkante nicht die Papierrückführeinrichtung (25) der Papierrückführvorrichtung (24) erreicht.
  6. Bilderzeugungsgerät nach Anspruch 5, dadurch gekennzeichnet, daß die Papierausgabevorrichtung (17) ein an der stromauf von der Abzweigführung (38) gelegenen Seite angeordnetes Paar von Papierausgabewalzen (39) aufweist, und daß die Mehrzahl von Papierausgabebereichen zugehörige Paare von Papierausgabewalzen (27, 28, 29) aufweist, sowie eine an der stromab gelegenen Seite einesjeweiligen Paars von Papierausgabewalzen gelegene Papierausgabeführung zum Führen des durch einen Transportweg bewegten Papiers, welche Papierausgabewalzen in geeigneten Intervallen stromab von der Abzweigführung (38) angeordnet sind.
  7. Bilderzeugungsgerät nach Anspruch 1, dadurch gekennzeichnet, daß eine feststehende Führung (55) über einem ersten geneigten Ablagebereich des ersten Papierlagerbereichs angeordnet ist, zum Führen des von dem Papierausgabebereich ausgegebenen Papiers, wenn Papier (P₁) mit dem größten Format in die Papierzuführeinrichtung transportiert wird und zum Tragen eines hinteren Bereichs des Papiers, wenn es gelagert wird.
  8. Bilderzeugungsgerät mit einem Gerätegehäuse (1), einem in das Gerätegehäuse einsetzbaren und aus diesem herausziehbaren Papiervorratsbehälter (13), einer Ablage (23) zum Lagern von Papier, auf dem ein Bild erzeugt worden ist, einer Papierausgabevorrichtung (17) mit einer Mehrzahl von Papierausgabebereichen (32, 33, 36) zum Ausgeben des Papiers auf der Ablage, und mit einer an der stromab von der Papierausgabevorrichtung gelegenen Seite angeordneten Papierrückführvorrichtung (24) zum erneuten Zuführen des auf der im Gerätegehäuse vorhandenen Ablage lagernden Papiers, dadurch gekennzeichnet, daß die Ablage (23) sowohl als Zwischenablage zum temporären Lagern des Papiers (P) zwischen den Kopiervorgängen, wenn das Papier mehrmals bedruckt wird, als auch als Papierausgabeablage zum Lagern des Papiers nach einem letzten Kopiervorgang dient und an der stromauf von der Papierrückführvorrichtung (24) gelegenen Seite angeordnet ist, wobei die Ablage (23) einen ersten Papierlagerbereich (44) und einen zweiten Papierlagerbereich (45) aufweist, und daß eine Abzweigführung (38) zum Abzweigen des Papiers (P₁) mit dem größten Format, auf dem ein Bild erzeugt ist, zu der Ablage (23) in der Papierausgabevorrichtung an einer Stelle angeordnet ist, wo das zu der Ablage geführte und auf der Ablage gelagerte Papier (P₁) mit dem größten Format nicht die Papierrückführeinrichtung (25) der Papierrückführvorrichtung (24) erreicht, und an einem vorderen Ende der stromauf vom Papierausgabebereich gelegenen Seite.
  9. Bilderzeugungsgerät nach Anspruch 8, dadurch gekennzeichnet, daß die Abmessungen des ersten Papierlagerbereichs (44) und des zweiten Papierlagerbereichs (45) so gewählt sind, daß sich das auf der Ablage gelagerte Papier (P₁) mit größtem Format sich über beide Bereiche erstreckt.
  10. Bilderzeugungsgerät nach Anspruch 9, dadurch gekennzeichnet, daß ein Bereich der Endkante des Papiers, das dem abschließenden Kopiervorgang unterzogen worden ist, auf dem ersten Papierlagerbereich (44) aufliegt, während eine Führungsseite des erneut zuzuführenden Papiers auf dem zweiten Papierlagerbereich (45) aufliegt.
  11. Bilderzeugungsgerät nach Anspruch 10, dadurch gekennzeichnet, daß der erste Papierlagerbereich (44) einen ersten langen geneigten Ablagebereich (46) aufweist, der so geneigt ist, daß er an seiner stromauf gelegenen Seite niedriger ist, und der eine größere Fläche aufweist, als der zweite geneigte Ablagebereich (47).
  12. Bilderzeugungsgerät nach Anspruch 10, dadurch gekennzeichnet, daß der erste Papierlagerbereich (44) einen ersten langen geneigten Ablagebereich (46) aufweist, der so geneigt ist, daß er an seiner stromauf gelegenen Seite niedriger ist, und der eine größere Fläche aufweist, als der zweite geneigte Ablagebereich (47), der kürzer ist und so geneigt ist, daß er an seiner stromab gelegenen Seite niedriger ist, wobei beide geneigten Ablagebereiche miteinander verbunden sind und der zweite Papierlagerbereich (45) an der stromab von dem zweiten geneigten Ablagebereich (47) gelegenen Seite, aber von dem zweiten geneigten Ablagebereich getrennt angeordnet ist.
  13. Bilderzeugungsgerät nach Anspruch 12, dadurch gekennzeichnet, daß innerhalb des Gerätegehäuses (1) Ablagenführungen (48, 49) quer angeordnet sind, und daß von den Ablagenführungen zu führende und mit diesen im Eingriff stehende Teile (52, 53) an beiden Seiten des ersten Papierlagerbereichs (44) vorgesehen sind, so daß der erste Papierlagerbereich (44) von dem zweiten Papierlagerbereich (45) zum Einsetzen und Herausziehen an der Vorderseite des Gerätegehäuses (1) getrennt werden kann.
  14. Bilderzeugungsgerät nach Anspruch 12, dadurch gekennzeichnet, daß der erste Papierlagerbereich (44) und der zweite Papierlagerbereich (45) voneinander getrennt sind.
  15. Bilderzeugungsgerät nach Anspruch 10, dadurch gekennzeichnet, daß die Papierausgabevorrichtung (17) ein an der stromauf von der Abzweigführung (38) gelegenen Seite angeordnetes Paar von Papierausgabewalzen (39) aufweist, und daß die Mehrzahl von Papierausgabebereichen zugehörige Paare von Papierausgabewalzen (27, 28, 29) aufweist, sowie eine an der stromab gelegenen Seite eines jeweiligen Paars von Papierausgabewalzen gelegene Papierausgabeführung zum Führen des durch einen Transportweg bewegten Papiers, welche Papierausgabewalzen in geeigneten Intervallen stromab von der Abzweigführung (38) angeordnet sind.
  16. Bilderzeugungsgerät nach Anspruch 10, dadurch gekennzeichnet, daß eine feststehende Führung (55) über einem ersten geneigten Ablagebereich (46) des ersten Papierlagerbereichs (44) angeordnet ist, zum Führen des von dem Papierausgabebereich ausgegebenen Papiers, wenn Papier (P₁) mit dem größten Format in die Papierrückführeinrichtung (24) transportiert wird und zum Tragen eines hinteren Bereichs des Papiers, wenn es gelagert wird.
EP19910119558 1990-11-17 1991-11-15 Bilderzeugungsgerät Expired - Lifetime EP0486972B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2312186A JPH0818765B2 (ja) 1990-11-17 1990-11-17 画像形成装置
JP312186/90 1990-11-17

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EP0486972A2 EP0486972A2 (de) 1992-05-27
EP0486972A3 EP0486972A3 (en) 1992-11-19
EP0486972B1 true EP0486972B1 (de) 1995-05-10

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EP19910119558 Expired - Lifetime EP0486972B1 (de) 1990-11-17 1991-11-15 Bilderzeugungsgerät

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JP4586347B2 (ja) * 2003-10-07 2010-11-24 富士ゼロックス株式会社 並列処理プリンタ

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Publication number Priority date Publication date Assignee Title
US3989236A (en) * 1973-12-13 1976-11-02 Canon Kabushiki Kaisha Copying machine
JPS62194264A (ja) * 1986-02-20 1987-08-26 Sharp Corp 中間トレイ部のジヤム検出装置
DE69021897T2 (de) * 1989-01-10 1996-02-29 Canon Kk Bilderzeugungsgerät.

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JPH04182277A (ja) 1992-06-29
DE69109628D1 (de) 1995-06-14
EP0486972A2 (de) 1992-05-27
DE69109628T2 (de) 1996-01-18
EP0486972A3 (en) 1992-11-19
JPH0818765B2 (ja) 1996-02-28

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