EP0696364B1 - Dispositif de menee d'une feuille individuelle pour imprimante ou photocopieuse electrographique - Google Patents

Dispositif de menee d'une feuille individuelle pour imprimante ou photocopieuse electrographique Download PDF

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Publication number
EP0696364B1
EP0696364B1 EP94911847A EP94911847A EP0696364B1 EP 0696364 B1 EP0696364 B1 EP 0696364B1 EP 94911847 A EP94911847 A EP 94911847A EP 94911847 A EP94911847 A EP 94911847A EP 0696364 B1 EP0696364 B1 EP 0696364B1
Authority
EP
European Patent Office
Prior art keywords
single sheet
recording carrier
conveying path
carrier conveying
sheets
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
EP94911847A
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German (de)
English (en)
Other versions
EP0696364A1 (fr
Inventor
Manfred Viechter
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.)
Canon Production Printing Germany GmbH and Co KG
Original Assignee
Oce Printing Systems GmbH and Co KG
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 Oce Printing Systems GmbH and Co KG filed Critical Oce Printing Systems GmbH and Co KG
Publication of EP0696364A1 publication Critical patent/EP0696364A1/fr
Application granted granted Critical
Publication of EP0696364B1 publication Critical patent/EP0696364B1/fr
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
    • G03G15/6529—Transporting

Definitions

  • the invention relates to a single sheet feed device for an electrographic printing or copying device that spans the single sheet feed device.
  • Such printing or copying devices place high demands on the printing speed.
  • a printing speed of about 50 sheets per minute (for example in A4 format) is achieved.
  • the single sheets are drawn off from a single sheet stack and are fed in succession from a removal device to a recording medium transport path of the single sheet feed device.
  • a printing unit which contains a developer station and a fixing station, is arranged in the course of the record carrier transport path. A print image is transferred to a single sheet in the developer station and this print image is fixed to the single sheet in the fixing station.
  • the development and fixing process can only be accelerated up to a maximum process speed.
  • a further increase in the process speed is consequently not possible with a constant printing quality by merely increasing the transfer printing and fixing speed and thus the transport speed of the single sheets.
  • a sheet feeder and a sheet discharge device are known which are suitable for feeding single sheets to a plurality of synchronously operating printers.
  • the single sheets are in the form of a single sheet stack.
  • the sheet feeder and the sheet discharge device ensure that a single sheet is fed to each printer or a printed single sheet is guided away from the printer in good time before the start of the subsequent printing cycle. Path length and The speed of the blade length is selected accordingly.
  • the feed speed is greater than the process speed. To increase the printing speed, however, a plurality of printing units arranged one above the other are required.
  • a printing device with two record carrier transport paths is known, which can be selected by a switch.
  • Drive roller pairs are arranged along the record carrier transport paths. These pairs of drive rollers are driven by belts. Belt ratios are provided, with the aid of which different speeds of the drive roller pairs can be realized.
  • two printing units are arranged one above the other. A record carrier transport path is assigned to each of the two printing units.
  • a single sheet feed device for arranging single sheet information carriers in which single sheets can be pulled off laterally from a single sheet stack and a transport path can be fed such that two single sheets can be transported lying side by side.
  • the single sheet feeder has a large number of mechanical and movable individual components, which is why a complex adjustment and frequent maintenance of the single sheet feeder can be expected.
  • the invention is therefore based on the object of disclosing a single sheet feed device for an electrographic printing or copying device, with the aid of which the number of printed single sheets per unit of time is increased with constant print quality, and which has a small number of mechanical and movable individual components, so that neither one elaborate adjustment and frequent maintenance of the single sheet feeder is to be expected.
  • Two single sheets drawn one after the other from a stack of sheets are brought into a position with the aid of the switch and the splitting of the first record carrier transport path into a second and a third record carrier transport path, in which they can be processed together in one printing unit. If the process speed corresponds to a maximum processing speed, the number of printable single sheets per unit of time can thereby be doubled while the print quality remains the same.
  • the arrangement of at least a third pair of transport rollers in the second record carrier transport path, so that a single sheet transported in the second record carrier transport path is always grasped by a pair of transport rollers, ensures that the second speed at which the single sheet is transported in the second record carrier transport path is constant over the entire path length .
  • the pairs of transport rollers along the second record carrier transport path ensure reliable guidance of the single sheet transported there.
  • a loop-like guidance of the second record carrier transport path enables the length of the second record carrier transport path to be exactly given given spatial conditions to be selected so that the front edges of the two single sheets are aligned when the fourth record carrier transport path is reached at a predetermined second speed.
  • a fifth and a sixth record carrier transport path are arranged after the fourth record carrier transport path in such a way that the first single sheet comes into the sphere of influence of the fifth record carrier transport path and the second single sheet comes into the sphere of influence of the sixth record carrier transport path, ensures that the paired lines are lined up in sequence Single sheets in a row.
  • the fifth or the sixth record carrier transport path is guided in a loop-like manner in such a way that the first or second single sheet passing through this record carrier transport path at the fifth speed is laterally set back by the single sheet width by which the first single sheet in the second record carrier transport path had been displaced.
  • the sixth or fifth record carrier transport path is designed so that the second or first single sheet running through this record carrier transport path at a sixth speed can be transported without a lateral offset.
  • the single sheet feed device shown in FIG. 1, in which a record carrier transport path is branched, contains a first record carrier transport path 1, on which individual sheets A drawn off from a first single sheet stack 8 can be transported to a switch 10 arranged at the end of the first record carrier transport path 1.
  • the individual sheets A are captured on the first record carrier transport path 1 by a first pair of transport rollers W1 and are transported by friction at a first speed V1 (see FIG. 2).
  • the switch 10 guides an incoming single sheet A either to a loop-like second record carrier transport path 2 or to a third record carrier transport path 3 which extends the first record carrier transport path 1 in a straight line.
  • the switch 10 contains a flap which can be pivoted about an axis 12.
  • the axis 12 is transverse to the recording medium transport direction.
  • the deflection of the flap of the switch 10 in a first position, in which an incoming single sheet A the second record carrier transport path 2 is fed and into a second position, in which an incoming single sheet A is fed to the third record carrier transport path 3, is achieved by a switching means designed as a solenoid 11.
  • An electromotive or pneumatic drive is also suitable as switching means 11.
  • the third pairs of transport rollers W3.1, W3.2 are arranged at such a distance from one another along the second recording medium transport path 2 that a single sheet A1 transported in the second recording medium transport path 2 is always gripped by at least one of the third pairs of transport rollers W3.1, W3.2. This ensures that the transported single sheet Al is always guided exactly and transported at exactly the second speed V2.
  • the transported single sheet A1 describes the helix of a thread.
  • the thread pitch is chosen so that the single sheet A1 is offset by at least one single sheet width with respect to the first recording medium transport path 1 after passing through the second recording medium transport path 2.
  • the thread diameter is selected so that the dwell time of the single sheet Al transported at the second speed V2 in the second record carrier transport path 2 is so great that the front edge of the single sheet Al transported in the second record carrier transport path 2 coincides with the front edge of a single sheet A2 transported on the third record carrier transport path 3 reaches a fourth recording medium transport path 4 following the second and third recording medium transport paths 2, 3.
  • a single sheet A is transported in each case on the third record carrier transport path, which followed a single sheet A on the first record carrier transport path 1 and which was fed from the switch 10 to the second record carrier transport path 2.
  • a single sheet A2 transported on the third record carrier transport path 3 is transported there at a third speed V3. Due to the short length of the third record carrier transport path 3, a pair of transport rollers can be dispensed with in the third record carrier transport path 3 according to the exemplary embodiment. However, it is also possible to insert a pair of transport rollers in this third record carrier transport path 3 if this should be necessary.
  • the individual sheets A1, A2 coming from the second and third record carrier transport paths 2, 3 are grasped by one of the arranged along the arranged second transport roller pairs W2.1 and fed by friction to a printing unit D spanning the fourth record carrier transport path 4.
  • a printing unit D a print image is transferred to the individual sheets A in a developer station contained therein and in a likewise contained in the printing unit D. Fuser station fixed. After the print image has been fixed, the single sheets A leave the printing unit D again.
  • the individual sheets A are fed along the fourth record carrier transport path 4, on which they are captured by a further second pair of transport rollers W2.2, by friction to two subsequent record carrier transport paths 5, 6.
  • the fifth and sixth recording medium transport paths 5, 6 following the fourth recording medium transport path 4, like the second and third recording medium transport paths 2, 3, are each half as wide as the fourth recording medium transport path 4. They are arranged next to one another and can therefore each of one of two single sheets A transported next to one another record from the fourth record carrier transport path 4.
  • the fifth record carrier transport path 5, into which those single sheets arrive that have passed through the second record carrier transport path 2 before reaching the fourth record carrier transport path 4, is also loop-shaped, like the second record carrier transport path 2.
  • the slope, diameter and length of this fifth record carrier transport path correspond to those of the second record carrier transport path 2
  • two pairs of transport rollers W4.1, W4.2 are arranged. These fourth pairs of transport rollers W4.1, W4.2 ensure exact guidance and compliance with the desired speed of a single sheet A1 transported on the fifth record carrier transport path 5.
  • the sixth record carrier transport path 6 extends one half of the fourth record carrier transport path 4 in a straight line.
  • a pair of transport rollers (not shown) which accelerates a single sheet A2 present in the sixth record carrier transport path 6 to a sixth speed V6 and a subsequent seventh record carrier transport path 7.
  • an incoming single sheet A1, A2 is picked up by a fifth pair of transport rollers W5 and fed to a second single sheet stack 9 at the sixth speed V6.
  • the ends of the fifth and the sixth record carrier transport path 5, 6 are both opposite the start of the seventh record carrier transport path 7, viewed in the record carrier transport direction.
  • a single sheet A1 which comes from the fifth record carrier transport path 5, is fed to the seventh record carrier transport path 7 obliquely from above and a single sheet A2, which comes from the sixth record carrier transport path 6, is fed straight to the seventh record carrier transport path 7.
  • the position of a pair of single sheets A1, A2 at different times T1 to T6 is shown below with reference to FIG. 3.
  • the first single sheet A1 is at the first point in time T1.1 before the second single sheet A2, which is the same at the same first point in time T1.2 to the first single sheet A1 Distance follows.
  • the individual sheets A1, A2 are transported to the switch 10 at the first speed V1 in the recording medium transport direction.
  • the flap of the switch 10 this flap is pivoted downward about the axis 12 such that the first single sheet A1 is guided over the switch into the second record carrier transport path 2.
  • the first single sheet A1 is successively grasped by the third pairs of transport rollers W3.1, W3.2 and guided helically to the fourth recording medium transport path 4.
  • the lifting magnet 11 swings the flap of the switch 10 upwards about the axis 12.
  • the second single sheet A2 following the first single sheet A1 does not reach the second but the third record carrier transport path 3. Its length is so short that at a second point in time T2.1, T2.2 both the first single sheet A1 and the second one Single sheet A2, with the leading edges aligned side by side, reach the fourth record carrier transport path 4.
  • the single-sheet pair A1, A2 is captured by a second pair of transport rollers W2.1 and transported into the printing unit D at the process speed V4 in the record carrier transport direction.
  • Downstream of the printing unit D is a further second pair of transport rollers W2.2, which detects the single sheet pair A1, A2 and transports them at the process speed V4 on the fourth record carrier transport path 4 in the record carrier transport direction.
  • the single sheets A1, A2 are in front of the printing unit D and at the fourth point in time T4.1, T4.2.
  • first, second, third and process speeds V1, V2, V3, V4 were to be the same, then there would be a distance of the length of a single sheet A between the pairs of single sheets A transported on the fourth record carrier transport path 4. This increase in the distance between the Single sheets A would reduce the number of printable single sheets A per unit of time. An increased distance between the individual sheets A can, however, be avoided according to the invention in that the process speed V4 is smaller than the first, second and third speeds V1, V2, V3, in extreme cases halved.
  • the single sheet A1 reaches the fifth record carrier transport path 5 and the second single sheet A2 reaches the sixth Record carrier transport path 6.
  • the individual sheets A1, A2 are already in the record carrier transport paths 5, 6 mentioned.
  • the individual sheets A1, A2 are transported at a fifth or sixth speed V5, V6 transported.
  • the fifth and sixth speeds V5, V6 are twice as large as the process speed V4. This ensures that the single sheets A arriving in pairs are removed one after the other so quickly that no single sheet jam can occur.
  • both individual sheets A1, A2 are located completely on the seventh record carrier transport path 7 and are then deposited one after the other on the second single sheet stack 9.
  • the sequence of the individual sheets A transported in pairs is reversed, ie a single sheet A1 transported in the first record carrier transport path 1 in front of a second single sheet A2 is located on the seventh record carrier transport path 7 behind the second single sheet A2.
  • this is generally not a problem, since the individual sheets are generally unprinted before they pass through the printing unit D.
  • the stacking order as is present in the first single sheet stack 8, has to be restored when stacking in the second single sheet stack 9, only the fifth and sixth recording medium transport paths 5, 6 need to be exchanged.
  • the stacking order must be adhered to when printing forms, for example.
  • conveyor belts or a Find tractor drive This has no influence on the subject matter of the invention.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)

Abstract

Des feuilles individuelles (A) sont extraites de manière classique d'une première pile de feuilles individuelles (8) et sont transportées sur une première trajectoire de support d'enregistrement (1). Un dispositif d'aiguillage (10) monté à son extrémité dirige alternativement les feuilles individuelles (A) vers une deuxième et une troisième trajectoire de support d'enregistrement (2, 3). Dans la deuxième trajectoire (2) qui se présente sous forme d'une succession de boucles, les feuilles individuelles (A) sont décalées latéralement d'une largeur de feuille. Une feuille individuelle (A1) décalée latéralement et une feuille individuelle (A2) qui n'a pas été décalée latéralement, atteignent en même temps une quatrième trajectoire de support d'enregistrement (4) où elles sont acheminées par deux jusqu'à une unité d'impression (D) qui recouvre la quatrième trajectoire de support d'enregistrement (4) et d'où elles sont ensuite ressorties. Puis, dans chaque paire de feuilles individuelles, une feuille (A1) sur deux est à nouveau décalée d'une largeur de feuille dans une cinquième trajectoire de support d'enregistrement (5) se présentant également sous forme d'une succession de boucles, tandis que l'autre feuille individuelle (A2) est acheminée plus loin en ligne droite. Les feuilles individuelles (A) atteignent les unes à la suite des autres en série une seconde pile de feuilles individuelles (9).

Claims (5)

  1. Dispositif d'alimentation en feuilles pour une imprimante ou un copieur électrographique comprenant les composants suivants:
    - une première voie de transport de support d'enregistrement (1) transportant des feuilles individuelles (A) en série à une première vitesse (V1) qui est supérieure à la vitesse de process pendant l'impression des feuilles individuelles,
    - un aiguillage (10) associé à la première voie de transport de support d'enregistrement (1) pour l'élection, en fonction de la succession des feuilles, d'au moins une deuxième ou une troisième voie de transport de support d'enregistrement (2, 3) située en aval, où
    - la troisième voie de transport de support d'enregistrement (3) est disposée dans le prolongement de la première voie de transport de support d'enregistrement (1),
    - la deuxième voie de transport de support d'enregistrement (2) est guidée de telle sorte qu'une feuille individuelle (A) passant par cette voie de transport de support d'enregistrement (2) est- décalée latéralement d'au moins une largeur de feuille,
    - l'aiguillage (10) comprend un clapet pour l'accouplement de la première voie de transport de support d'enregistrement (1) soit à la deuxième soit à la troisième voie de transport de support d'enregistrement (2, 3), et
    - les temps de séjour des feuilles individuelles (A) dans les deuxième et troisième voies de transport de support d'enregistrement (2, 3) sont cadencés de telle sorte que les feuilles individuelles (A) atteignent ensemble un dispositif d'impression (D) situé en aval, recouvrant les feuilles individuelles (A), les transportant à la vitesse de process (V4) et imprimant les feuilles individuelles (A).
  2. Dispositif d'alimentation en feuilles selon la revendication 1, dans lequel :
    - est prévu un premier moyen de transport (W1), disposé à l'intérieur de la voie de transport de support d'enregistrement (1) et qui saisit une feuille individuelle (A) et l'amène à la première vitesse (Vl) dans l'aiguillage (10),
    - à l'intérieur de la deuxième voie de transport de support d'enregistrement (2), au moins un troisième moyen de transport (W3.1, W3.2) transportant la feuille individuelle (A1) à une deuxième vitesse (V2), est disposé de telle sorte qu'une feuille (A1) transportée dans la deuxième voie de transport de support d'enregistrement (2) est toujours saisie par l'un des troisièmes moyens de transport (W3.1, W3.2),
    - les temps de séjour des feuilles individuelles (A) dans la deuxième et la troisième voies de transport de support d'enregistrement (2, 3) sont cadencés de telle sorte que les bords avant des deux feuilles individuelles (A1, A2) s'alignent à l'arrivée dans une quatrième voie de transport de support d'enregistrement (4) située en aval, et
    - un deuxième moyen de transport (W2,1) est prévu, qui saisit ensemble la première et la deuxième feuilles individuelles (A1, A2) à leur arrivée dans la quatrième voie de transport de support d'enregistrement (4) et les transporte à la vitesse de process (V4).
  3. Dispositif d'alimentation en feuilles selon la revendication 2, dans lequel les première, deuxième et troisième vitesses (V1, V2, V3) sont deux fois supérieures à la vitesse de process (V4).
  4. Dispositif d'alimentation en feuilles selon l'une des revendications 1 à 3, dans lequel la deuxième voie de transport de support d'enregistrement (2) a une forme de boucle.
  5. Dispositif d'alimentation en feuilles selon l'une des revendications 2 à 4, dans lequel :
    - une cinquième et une sixième voies de transport de support d'enregistrement (5, 6) sont associées en aval de la quatrième voie de transport de support d'enregistrement (4) de telle sorte que la première feuille individuelle (A1) arrive dans la cinquième voie de transport de support d'enregistrement (5) et la deuxième feuille individuelle (A2) dans la sixième voie de transport de support d'enregistrement (6),
    - la cinquième ou la sixième voie de transport de support d'enregistrement (5, 6) est guidée de telle sorte que la première ou la deuxième feuille individuelle (Al, A2) passant par cette voie de transport de support d'enregistrement (5, 6) à une cinquième vitesse (V5), est décalée latéralement vers l'arrière de la largeur de feuille de laquelle la première feuille individuelle (Al) a été décalée dans la deuxième voie de transport de support d'enregistrement (2),
    - la sixième ou la cinquième voie de transport de support d'enregistrement (6, 5) est guidée de telle sorte que la deuxième ou la première feuille individuelle (A2, A1) passant par cette voie de transport de support d'enregistrement (6, 5) à une sixième vitesse (V6), peut être transportée sans décalage latéral, et
    - les temps de séjour des feuilles individuelles (A) dans la cinquième et la sixième voie de transport de support d'enregistrement (5, 6) sont cadencés de telle sorte que les feuilles individuelles (A1, A2) arrivent les unes à la suite des autres dans une septième voie de transport de support d'enregistrement (7) située en aval.
EP94911847A 1993-04-29 1994-04-11 Dispositif de menee d'une feuille individuelle pour imprimante ou photocopieuse electrographique Expired - Lifetime EP0696364B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4314158 1993-04-29
DE4314158 1993-04-29
PCT/DE1994/000402 WO1994025905A1 (fr) 1993-04-29 1994-04-11 Dispositif de menee d'une feuille individuelle pour imprimante ou photocopieuse electrographique

Publications (2)

Publication Number Publication Date
EP0696364A1 EP0696364A1 (fr) 1996-02-14
EP0696364B1 true EP0696364B1 (fr) 1997-09-17

Family

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Application Number Title Priority Date Filing Date
EP94911847A Expired - Lifetime EP0696364B1 (fr) 1993-04-29 1994-04-11 Dispositif de menee d'une feuille individuelle pour imprimante ou photocopieuse electrographique

Country Status (5)

Country Link
US (1) US5584474A (fr)
EP (1) EP0696364B1 (fr)
JP (1) JPH08509450A (fr)
DE (1) DE59404105D1 (fr)
WO (1) WO1994025905A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6317580B1 (en) 1999-10-29 2001-11-13 OCé PRINTING SYSTEMS GMBH Printing system for parallel printing with offset printing sides on two recording media

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JP2003112450A (ja) * 2001-10-09 2003-04-15 Fuji Photo Film Co Ltd 画像記録方法および装置
US7823870B2 (en) * 2007-09-27 2010-11-02 Konica Minolta Business Technologies, Inc. Image forming apparatus

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US2251596A (en) * 1940-05-28 1941-08-05 Morgan Construction Co Switch mechanism
US3716178A (en) * 1971-12-09 1973-02-13 Copley Press Inc Web guiding and corner folding apparatus
NL7612693A (nl) * 1976-11-16 1978-05-18 Oce Van Der Grinten Nv Inrichting voor het transporteren van een velvormig origineel.
US4208666A (en) * 1978-10-23 1980-06-17 The Mead Corporation Multiple copy ink jet printer
JPS5719244A (en) * 1980-07-11 1982-02-01 Tokyo Keiki Co Ltd Preparation of paper conveyance
US4431322A (en) * 1982-09-20 1984-02-14 Ncr Canada Ltd - Ncr Canada Ltee Multiple path recording means
JPS59180568A (ja) * 1983-03-31 1984-10-13 Fuji Xerox Co Ltd 電子写真複写機
US4587532A (en) * 1983-05-02 1986-05-06 Canon Kabushiki Kaisha Recording apparatus producing multiple copies simultaneously
JPS6023844A (ja) * 1983-07-19 1985-02-06 Canon Inc 画像形成装置
US4727402A (en) * 1986-12-18 1988-02-23 Xerox Corporation Automatic copier signature set production
JP2603358B2 (ja) * 1990-06-29 1997-04-23 株式会社テック 印字装置
DE4203265C2 (de) * 1991-02-25 1996-12-19 Siemens Nixdorf Inf Syst Druck- oder Kopiergerät mit beidseitig eines Aufzeichnungsträger-Transportkanals angeordneten Zwischenträgern für ein- oder mehrfarbigen Simplex- oder Duplexdruck

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6317580B1 (en) 1999-10-29 2001-11-13 OCé PRINTING SYSTEMS GMBH Printing system for parallel printing with offset printing sides on two recording media

Also Published As

Publication number Publication date
DE59404105D1 (de) 1997-10-23
JPH08509450A (ja) 1996-10-08
WO1994025905A1 (fr) 1994-11-10
EP0696364A1 (fr) 1996-02-14
US5584474A (en) 1996-12-17

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