EP1213624B1 - Blattwendesystem - Google Patents

Blattwendesystem Download PDF

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Publication number
EP1213624B1
EP1213624B1 EP01310057A EP01310057A EP1213624B1 EP 1213624 B1 EP1213624 B1 EP 1213624B1 EP 01310057 A EP01310057 A EP 01310057A EP 01310057 A EP01310057 A EP 01310057A EP 1213624 B1 EP1213624 B1 EP 1213624B1
Authority
EP
European Patent Office
Prior art keywords
sheet
path
inverter
inverters
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
EP01310057A
Other languages
English (en)
French (fr)
Other versions
EP1213624A3 (de
EP1213624A2 (de
Inventor
James S. Stoll
Brian R. Conrow
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xerox Corp
Original Assignee
Xerox Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US09/730,363 external-priority patent/US6550762B2/en
Priority claimed from US09/730,364 external-priority patent/US6450711B1/en
Application filed by Xerox Corp filed Critical Xerox Corp
Publication of EP1213624A2 publication Critical patent/EP1213624A2/de
Publication of EP1213624A3 publication Critical patent/EP1213624A3/de
Application granted granted Critical
Publication of EP1213624B1 publication Critical patent/EP1213624B1/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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/58—Article switches or diverters
    • B65H29/60—Article switches or diverters diverting the stream into alternative paths
    • 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
    • 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
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/33—Modifying, selecting, changing orientation
    • B65H2301/332—Turning, overturning
    • B65H2301/3321—Turning, overturning kinetic therefor
    • B65H2301/33214—Turning, overturning kinetic therefor about an axis perpendicular to the direction of displacement and parallel to the surface of material
    • 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
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/33—Modifying, selecting, changing orientation
    • B65H2301/333—Inverting
    • B65H2301/3331—Involving forward reverse transporting means
    • B65H2301/33312—Involving forward reverse transporting means forward reverse rollers pairs
    • 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
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/33—Modifying, selecting, changing orientation
    • B65H2301/333—Inverting
    • B65H2301/3332—Tri-rollers type
    • 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
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/448—Diverting
    • B65H2301/4482—Diverting to multiple paths, i.e. more than 2
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/06—Office-type machines, e.g. photocopiers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/24—Post -processing devices
    • B65H2801/27—Devices located downstream of office-type machines

Definitions

  • Copiers or printers having two sheet inverters in a printer/finisher system where one inverter is in the duplex loop path and the other inverter is in the finisher input or the output path of the copier or printer.
  • Fig. 3 of US-A-5,697,040 which shows a xerographic printer with both a duplex path sheet inverter and an output path sheet inverter.
  • US-A-5,568,246 combines in series two different printing systems into a so-called dual engine printing system. In doing so, the single inverters of each of these print engines provide two inverters, but they are in two separate print engines.
  • Other examples are disclosed in US-A-4,986,529 and US-A-5,131,649.
  • the sheet inverter speed, the duplex loop speed, and the exit speed of the printer often need to be much higher than the process speed. This also imposes difficulties and constraints on the sheet drives, the registration subsystems, etc.
  • process speed in some contexts can refer to the sheet velocity related to the printing rate of the system.
  • the process speed may be the velocity at which the image substrate sheet is fed to, and image-transferred at, the transfer station engagement with the photoreceptor belt or drum, which is running at the process speed.
  • process speed may more broadly encompass the velocity of the sheets moving in the particular paper path to which the dual inverters are operatively connected. Especially since, for example, it is known to run printer output paths and/or duplex paths at a higher sheet transport velocity than the sheet velocity at image transfer.
  • the sheet inversion system requires that all sheets being inverted be rapidly accelerated from the process speed to a much higher inverter speed as they enter the inverter. That is, to be accelerated in a very short distance from a process or other speed to approximately twice the process speed for movement into the inverter. That is typically followed by rapid deceleration of the sheet in the inverter from that higher speed, and then re-acceleration to that higher speed for exiting from the inverter. In addition to the above-described difficulties, this also imposes more critical sheet timing and registration problems.
  • US-A-4579446 discloses a sheet inverting system in which sheets are fed from a recording unit into a reversing unit having upper and lower reversing guides into which alternate sheets are alternately fed.
  • a sheet inverter system comprises a dual inverter system operatively connecting with a sheet path along which closely sequentially spaced apart printed sheets are fed in use, said dual inverter system comprising two independent but cooperative alternate sheet inverters and a sheet gating control system, said sheet gating control system being programmable and operable to alternately direct alternate said closely sequentially spaced apart printed sheets in said sheet path into said alternate independent sheet inverters, and is characterized in that said two independent but cooperative alternate sheet inverters are located upstream and downstream from one another along said sheet path, and operable in series with said sheet path so that alternate sheets leapfrog one another by feeding a first sheet in said feed path into said upstream inverter and feeding the immediately following second sheet in said feed path past said first sheet in said upstream inverter and into said downstream inverter, and then feeding said first sheet out of said upstream inverter past said second sheet in said downstream inverter, and then feeding said second sheet in said downstream inverter into said feed path.
  • Disclosed in the embodiment herein is an improvement in high speed printing utilizing a combination of two cooperative sheet inverters to improve the overall productivity of the printing system.
  • sheet inversion properly coordinated and/or collated with the printing sequence is important for duplexing (both sides sheet printing), sheet output collation, finishing, and the like.
  • the system disclosed herein avoids the typical conventional approach of using a much higher paper path (sheet feeding) velocity in a single inverter (which can be as much as twice the normal paper path or process speed of the printer) yet can maintain collation, maintain a proper inter-sheet gap in the sheet path and insure that successively printed sheets do not impact or interfere with one another, even with high speed printing with rapidly successive sheets moving in the paper paths.
  • An advantage of the invention is that it provides the possibility of a simplex or non-inverting sheet path.
  • sequential sheets in the paper path may be alternatingly inverted by the two inverters. Directly sequential sheets need not be inverted in the same inverter.
  • a much lower speed inverter operation can be employed, providing numerous advantages. For example, with lower speed inverters, less power may be required, acoustic noise may be lower, and system reliability, including reduced sheet jam rates, may be improved.
  • a subsequent sheet need not be delayed for the inversion of a preceding sheet in order to avoid sheet impact or collision, or sheets becoming out of sequential page order in pre-collated printing.
  • the disclosed dual inverter system embodiments provide opportunities for improved high speed pre-collated printing productivity without increasing the operating speeds and sheet reversal rates of sheets in the inverter and without requiring an increase in the inter-sheet or inter-pitch gaps between sheets.
  • the disclosed dual alternate inverter embodiments have additional potential advantages. For example, they may utilize, and even duplicate, otherwise conventional or existing inverters or inverter components. That is, this system may use two of any of various well-known or other types of sheet inverters. It may be incorporated into various types of high-speed reproduction apparatus, or finishers therefor, with little modification.
  • the entrance and exit paths and locations of the dual inverters will, of course, vary depending on the desired application of the system and the reproduction apparatus, as will be explained further herein.
  • the location and configuration of the dual inverters and their input and output paths may be different for application in a sheet output or finisher system, as opposed to utilizing the dual inverter system in a duplex loop return path for second side printing.
  • the dual inverters may optionally be in a separate connecting modular unit from the reproduction apparatus.
  • sheet inverters may be used even in simplex (only one side printed) printing in some situations. For example, for inverting simplex sheets printed face up in 1 to N (forward serial) order, so that they can be stacked face down as properly collated sets. Or, alternatively, sheets being printed face down (image sides down) in N to 1 (reverse serial) order being inverted for face up stacking. In some systems, having an odd number of natural sheet path inversions, sheet inversion could even be required in a sheet path for second color overprinting of the same side of the sheet. That is, the term "inverter" in the art can broadly encompass various systems for avoiding a sheet being turned over, as well as being turned over, and/or reversing the leading edge to trailing edge orientation of the sheet, in the overall sheet path.
  • a specific feature of the specific embodiment disclosed herein is to provide a high speed reproduction apparatus with a sheet path in which closely sequentially spaced apart printed sheets are fed downstream in said sheet path in an original sheet sequence, said sheet path having an operative connection to a sheet inverter system according to the invention into which said closely sequentially spaced apart printed sheets in said sheet path are fed to be inverted.
  • the two independent but cooperative alternate sheet inverters may be spaced on opposite sides of said sheet path.
  • the alternate sheet inverters may each have independently operable sheet input gates which are spaced apart from one another along said sheet path and which are differently actuated by a sheet gating control system to be alternatingly fed alternate sheets from said sheet path.
  • production apparatus or “printer” as used herein broadly encompasses various printers, copiers or multifunction machines or systems, xerographic or otherwise, unless otherwise defined in a claim.
  • sheet herein refers to a usually flimsy physical sheet of paper, plastic, or other suitable physical substrate for images, whether precut or web fed.
  • a "copy sheet” may be abbreviated as a “copy” or called a “hardcopy.”
  • a "print job” is normally a set of related sheets, usually one or more collated copy sets copied from a set of original document sheets or electronic document page images, from a particular user, or otherwise related.
  • a “simplex" document or copy sheet is one having its image and any page number on only one side or face of the sheet, whereas a “duplex” document or copy sheet has "pages,” and normally images, on both sides, i.e., each duplex sheet is considered to have two opposing sides or "pages" even though no physical page number may be present.
  • a dual inverter system of two independent but cooperative sheet inverters is sheet control gated to receive alternate sheets from the sheet path for inversion in the alternate independent sheet inverters.
  • These dual alternate sheet inverters may advantageously operate at substantially the same sheet velocity as the connecting sheet path, instead of the much higher speed and acceleration/deceleration typical of conventional single inverter systems. Yet the original collated sequential sheet order is maintained.
  • the two independent but cooperative alternate sheet inverters are operatively connected in series spaced along the sheet path to be alternatingly fed alternate sheets from the sheet path by separate gates and to return sheets to the same sheet path at different locations.
  • this dual inverter system 30 of Figs. 1-4 may be conventional, and/or similar to the dual inverter system 10 of Figs. 6-8 described below, and thus need not be described in detail here.
  • the two inverters 33A, 33B of this dual inverter system 30 may desirably be of known, conventional type. In this example, these are so-called "tri-roll inverters" with two roll nips, one for receiving incoming sheets and one returning (feeding out) the inverted sheets.
  • inverters 33A, 33B have respective conventional tri-rolls 36A, 36B, and inverter chute reversing rolls 37A, 37B in curved inverting chutes 38A, 38B. It may be seen that each individual inverter 33A or 33B of this dual inverter system 30 gates (35A, 35B) in sheets from the paper 34 and returns the inverted sheets back to the same paper path (sheet path) 34 after their inversion in a known and conventional manner, but with different timing and control, as will be described. Both inverters 33A, 33B here are positioned on the same side of the paper path 34, which may be desirable for vertical operating space reasons.
  • Figs. 2, 3, and 4 illustrate an example of the sequential operation of this dual inverter system 30 for two sequential sheets being fed downstream in the sheet path 34, a first sheet 31 and a second sheet 32.
  • Fig. 2 shows the first sheet 31 having been gated into the first inverter 33A while the second sheet 32 is being fed on past it.
  • the second sheet 32 is being gated into the second inverter 33B while the first sheet has been inverted and is about to be fed out of the first inverter 33A.
  • Fig. 4 shows that sheet one (31) has now been fed out into the paper path 34 and fed past the second inverter 33B, and that sheet two (32) is about to be fed out of the second inverter 33B into the paper path 34 right behind sheet one.
  • the entrance gates 35A, 35B of these inverters 33A and 33B may otherwise be operated similarly to the below-described decision gates 14A, 14B of the example of Figs. 6-8.
  • the sheets all enter on the common entrance path 41 and exit on the common exit path 42.
  • the sheets may be deflected by a single inverter decision gate 43 into either the upper inverter 44A or a lower inverter 44B, respectively having inverter chutes 45A, 45B.
  • each inverter 44A, 44B has a parallel output path 46A, 46B leading from the inverter chute and its tri-roll output to a merger position in the common exit path 42.
  • a single inverter routing gate 43 alternately routes every other sheet to the alternate inverters 44A or 44B to provide alternative sheet inverting passage between the entrance path 41 and the exit path 42.
  • additional decision gates and a bypass path may be provided as shown in phantom at 47A, 47B.
  • the inverter routing gate 43 may be, as shown, a three-way gate, and have a central position allowing the feeding of simplex sheets through that gate 43 straight through from the common entrance path 41 to the common exit path 42, thereby eliminating any need for bypass gates and paths 47A, 47B.
  • This alternative simplex path is shown in Fig. 5 by the phantom lines paper path directly connecting the common entrance path 41 to the common exit path 42 through gate 43, all in a common plane.
  • Figs. 6-8 show a further specific comparative example and descriptions as to gate control functions, sensors, etc., below or above, may also apply to the embodiment and need not be repeated
  • a dual inverter system 10 consisting of two adjacent inverters 12A and 12B in parallel. Both of these inverters 12A and 12B have their sheet inputs connecting to the same paper path 13 at adjacent but spaced apart positions.
  • the connection of the inverters to the paper path 13 in this case is respectively provided by their two respective inverter decision gates 14A and 14B.
  • these decision gates 14A or 14B When activated, these decision gates 14A or 14B extend into the paper path 13 to engage the leading edge of a selected sheet in the paper path 13 and deflect that sheet into the respective inverter entrance path 15A or 15B of the inverter 12A or 12B.
  • This, and other operations, may be under the programmed control of a conventional controller 100 in the associated printer 20 of Fig. 8 or in a separate modular controller of the dual inverter system 10 itself, which may be a modular unit for the printer, and/or part of a finisher module.
  • the decision gates 14A and 14B may be alternatingly actuated by the controller 100 between each alternating sheet in the sheet path 13, so as to put alternate sequential sheets that are moving in the paper path 13 into alternate inverters 12A or 12B.
  • the construction and operation of the two inverters 12A and 12B themselves may be identical, and may be conventional.
  • a sheet is fed through the inverter entrance path 15A or 15B by conventional feed rollers at that point and it may pass a paper jam sensor 101A, 101B for jam detection.
  • That sensor 101A, 101B may optionally also be a dual mode sensor sending a control signal to the bi-directional inverter motor for the reversible feed rolls 17A, 17B in the inverter chutes 16A, 16B.
  • the sheet After the sheet has continued to be fed fully out of the sheet path 13 it continues to be fed on into the inverter chutes 16A or 16B.
  • the reversible rolls 17A, 17B are reversed, that is, reversibly driven, to drive the sheet out through the exit path 19A, 19B.
  • These one-way bypass gates 18A, 18B may be non-actuated gates such as a conductive light spring steel, or plastic material, that will allow paper to pass through it and they spring back to its normal form, as is well known in other document handlers and other systems in the art.
  • the bi-directional sensor 101A, 101B may be provided in the inverter chute 15A, 15B to provide a two-function paper entrance and exit sensor design. This can provide software algorithm signals to control the drive of the bi-directional inverter motor for the reversible feed rolls 17A, 17B in opposite directions when the respective lead and trail edges of the sheet of paper are detected.
  • These inverters 12A or 12B can automatically accommodate intermixed print jobs, for example, sheets varying from letter size to ledger size. It may be seen that these inverters 12A or 12B of this dual inverter system 10 here also provide large sheet path radii, which reduces potential sheet jam problems.
  • this exit path 19A, 19B would rejoin the original paper path 13, as shown in other examples herein.
  • the exit paths 19A, 19B converge into a common output path which is part of an otherwise conventional duplex loop sheet path 22 which returns the sheets inverted back for their second side printing in the printer 20.
  • the exemplary duplex loop sheet path 22 provides conventional second side printing of the sheets being duplexed before they are fed out to the printer 20 output sheet path 24.
  • sheets being only simplex printed would not need be inverted and fed through this duplex loop path 22. They may go directly to the sheet output path 24, as is well known to those in the art. In this case, desirably passing linearly through the paper path 13 thereto.
  • the sheets are being conventionally imaged in this particular printer 20 example by passage of the sheets past a transfer station 25 for receiving the images transferred from a photoreceptor 26.
  • a comparable print station could be provided by inkjet or other printing systems suitable for high speed printing as well.
  • the clean sheets for the initial side printing may be conventionally provided from roll fed or cut sheet (as shown) feed sources, as is well known in the art and need not be described herein.
  • the printer 20 here is merely one example of a high speed xerographic digital laser printer, others of which are cited above, which can rapidly print sheets in proper sequential collated order, that is, pre-collated, thereby allowing direct on-line finishing of print jobs of collated document sets and not requiring an output sorter or collator.
  • the paper path 13 described above may be considered a continuation of the output sheet path 24 of the printer 20 into a separate module, which may also provide additional sheet feed sources, and/or an interposer module providing for inserting additional preprinted media into the sheet feed stream of the paper path 13.
  • the paper path 13 may typically extend on to one or more various finishing devices, as is also well known in the art.
  • the location(s) of the subject dual inverters may be in various of those units.
  • the signals for actuating the respective inverter entrance or decision gates 14A, 14B may be keyed to the sheet timing and positional signals which are already conventionally available in the printer 20 controller 100 for the sheet lead edge positions.
  • the timing and spacing between the lead edges of sequential sheets will, of course, vary depending on the length of the sheet in the process direction within a particular print job, so as to minimize wasted pitch and intra-document space between the various sheets being printed.
  • all of the sheet transports within the inverters 12A and 12B may be desirably operated at the same or substantially the same steady state sheet feeding velocity as the sheet transports of the paper path 13 with which it is associated.
  • This process speed may also be, but is not necessarily, the same as the imaging process speed of the printer 20.
  • this sheet handling provides significant advantages, without risking collision between closely adjacent sheets being printed by the printer 20. In particular, not having to move the sheets much more rapidly through the inverters for the sheet inversion process, and thus also reducing sheet acceleration and deceleration problems. Likewise, no undesirable overlapping of sheets in the inverter system is required and positive sheet feeding control may be obtained at all times. Thus, increased throughput for high speed printing may be provided, yet with increased reliability.

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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)
  • Conveyance By Endless Belt Conveyors (AREA)
  • Counters In Electrophotography And Two-Sided Copying (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Registering Or Overturning Sheets (AREA)

Claims (5)

  1. Blattwendesystem (30), das ein Doppel-Wendesystem umfasst, das funktionell mit einem Blattweg (34) verbunden ist, auf dem nah aufeinanderfolgend beabstandete bedruckte Blätter in Funktion transportiert werden, wobei das Doppel-Wendesystem zwei unabhängige, jedoch zusammenwirkende abwechselnde Blattwendeeinrichtungen (33A, 33B) und ein Blattausricht-Steuerungssystem (35A, 35B) umfasst, das Blattausricht-Steuerungssystem so programmiert und betrieben werden kann, dass es die nah aufeinanderfolgend beabstandeten bedruckten Blätter auf dem Blattweg (34) abwechselnd in die abwechselnden unabhängigen Blattwendeeinrichtungen (33A, 33B) leitet, dadurch gekennzeichnet, dass die zwei unabhängigen, jedoch zusammenwirkenden abwechselnden Blattwendeeinrichtungen (33A, 33B) entlang des Blattweges (34) vor- und hintereinander angeordnet sind und in Reihe mit dem Blattweg betrieben werden können, so dass abwechselnde Blätter einander überholen, indem ein erstes Blatt auf dem Blattweg (34) in die vordere Wendeeinrichtung (33A) transportiert wird und das unmittelbar folgende zweite Blatt auf dem Blattweg an dem ersten Blatt in der vorderen Wendeeinrichtung vorbei und in die hintere Wendeeinrichtung (33B) transportiert wird und dann das erste Blatt an dem zweiten Blatt in der hinteren Wendeeinrichtung (33B) vorbei aus der vorderen Wendeeinrichtung (33A) heraus transportiert wird und anschließend das zweite Blatt in der vorderen Wendeeinrichtung (33B) auf den Blattweg transportiert wird.
  2. System nach Anspruch 1, wobei die zwei unabhängigen, jedoch zusammenwirkenden abwechselnden Blattwendeeinrichtungen (33A, 33B) entsprechende Blattaustritte haben, die an verschiedenen Positionen mit ein und demselben Blattweg (34) verbunden sind.
  3. Hochgeschwindigkeits-Vervielfältigungsvorrichtung, die einen Blattweg (34) umfasst, auf dem nah aufeinanderfolgend beabstandete bedruckte Blätter auf dem Blattweg stromab transportiert werden, wobei der Blattweg eine funktionelle Verbindung zu einem Blatt-Wendesystem (30) nach einem der vorangehenden Ansprüche aufweist, in das die nah aufeinanderfolgend beabstandeten bedruckten Blätter auf dem Blattweg zum Wenden transportiert werden.
  4. Hochgeschwindigkeits-Vervielfältigungsvorrichtung nach Anspruch 3, wobei die nah aufeinanderfolgend beabstandeten bedruckten Blätter auf dem Blattweg (34) mit einer Prozessgeschwindigkeit transportiert werden und wobei beide unabhängigen, jedoch zusammenwirkenden abwechselnden Blattwendeeinrichtungen (33A, 33B) interne Blatttransportsysteme haben, die im Wesentlichen mit der gleichen Prozessgeschwindigkeit arbeiten.
  5. Hochgeschwindigkeits-Vervielfältigungsvorrichtung nach Anspruch 3 oder Anspruch 4, wobei die Hochgeschwindigkeits-Vervielfältigungsvorrichtung einen Duplexschleifenweg zum Zurückführen von auf einer Seite bedruckten Blättern, um sie auf ihrer anderen Seite zu bedrucken, aufweist, und wobei die zwei unabhängigen, jedoch zusammenwirkenden abwechselnden Blattwendeeinrichtungen (33A, 33B) abwechselnd verbunden sind, um einen Teil des Duplexschleifenweges zu bilden.
EP01310057A 2000-12-05 2001-11-30 Blattwendesystem Expired - Lifetime EP1213624B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US09/730,363 US6550762B2 (en) 2000-12-05 2000-12-05 High speed printer with dual alternate sheet inverters
US730364 2000-12-05
US09/730,364 US6450711B1 (en) 2000-12-05 2000-12-05 High speed printer with dual alternate sheet inverters
US730363 2000-12-05

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EP1213624A2 EP1213624A2 (de) 2002-06-12
EP1213624A3 EP1213624A3 (de) 2004-03-03
EP1213624B1 true EP1213624B1 (de) 2006-06-07

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EP01310057A Expired - Lifetime EP1213624B1 (de) 2000-12-05 2001-11-30 Blattwendesystem

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EP (1) EP1213624B1 (de)
JP (1) JP4185278B2 (de)
DE (1) DE60120328T2 (de)

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JP6931183B2 (ja) * 2017-05-16 2021-09-01 セイコーエプソン株式会社 記録システム
JP2019001639A (ja) * 2017-06-19 2019-01-10 コニカミノルタ株式会社 画像形成装置
JP6950453B2 (ja) * 2017-10-26 2021-10-13 コニカミノルタ株式会社 後処理装置
JP7451104B2 (ja) * 2019-08-01 2024-03-18 キヤノン株式会社 画像形成装置
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Also Published As

Publication number Publication date
DE60120328T2 (de) 2007-05-10
JP4185278B2 (ja) 2008-11-26
DE60120328D1 (de) 2006-07-20
EP1213624A3 (de) 2004-03-03
JP2002220150A (ja) 2002-08-06
EP1213624A2 (de) 2002-06-12

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