EP1068560A1 - Verfahren zum bedrucken von einzelblättern in gruppen nach dem duplexverfahren - Google Patents
Verfahren zum bedrucken von einzelblättern in gruppen nach dem duplexverfahrenInfo
- Publication number
- EP1068560A1 EP1068560A1 EP99917943A EP99917943A EP1068560A1 EP 1068560 A1 EP1068560 A1 EP 1068560A1 EP 99917943 A EP99917943 A EP 99917943A EP 99917943 A EP99917943 A EP 99917943A EP 1068560 A1 EP1068560 A1 EP 1068560A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheets
- printing
- group
- path
- single 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.)
- Granted
Links
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
- G03G15/22—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
- G03G15/238—Arrangements for copying on both sides of a recording or image-receiving material using more than one reusable electrographic recording member, e.g. single pass duplex copiers
-
- 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
- G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
- G03G15/0142—Structure of complete machines
- G03G15/0178—Structure of complete machines using more than one reusable electrographic recording member, e.g. one for every monocolour image
- G03G15/0194—Structure of complete machines using more than one reusable electrographic recording member, e.g. one for every monocolour image primary transfer to the final recording medium
-
- 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
- G03G2215/00016—Special arrangement of entire apparatus
- G03G2215/00021—Plural substantially independent image forming units in cooperation, e.g. for duplex, colour or high-speed simplex
-
- 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
- G03G2215/01—Apparatus for electrophotographic processes for producing multicoloured copies
- G03G2215/0103—Plural electrographic recording members
Definitions
- the invention relates to a method for printing single sheets in a printer or in a copier, a two-sided printing process being carried out on single sheets.
- High-performance printers can be operated in so-called duplex mode, which is also called duplex color spot mode.
- duplex mode which is also called duplex color spot mode.
- duplex mode single sheets are printed on both sides. If there is only one print on one side and two prints with different colors on the other side, then one speaks of duplex printing with three prints. If two prints are made on both sides of the single sheet, one speaks of the duplex printing mode with four prints.
- duplex printing systems with at least two printing units are known from US 4,591,884 A.
- Another high-performance printing device with two printing units is known from WO 91/13386 AI. It has two printing units and turning channels for turning the single sheets.
- a transfer printing transport path is assigned to each printing unit.
- the two transfer printing transport paths are connected to one another via a connecting channel.
- Sheet throughput is relatively low due to the relatively large sheet spacing.
- a printing device with only one printing unit is known from US Pat. No. 5,159,395, in which distances are also created between successive individual sheets of a sheet stream in order to subsequently introduce further individual sheets into the sheet stream.
- the single sheets are guided in groups on the transport path within the printer. In this way, a small distance can be set at the transfer printing speed between the individual sheets.
- the drive elements for the transport are not burdened by an additional start and stop operation, so that the wear of the entire transport system is reduced.
- the control effort is also reduced, since path and switching tolerances do not occur and corresponding buffer zones do not become necessary.
- the throughput of single sheets through the printer or copier is increased because the group of single sheets can be guided on the transport path at maximum speed.
- the distance between the last single sheet of the preceding group and the first single sheet of the following group is preferably approximately the predetermined distance. In this way, the throughput of single sheets becomes maximum.
- the alternating feeding of the single sheets to the two rings and / or the transporting of the single sheets up to near the printing units takes place at a higher speed than the transfer printing speed of the printing units. Due to this increased conveying speed, the distance between successive single sheets of a group is increased. This distance is used to alternately feed single sheets at the beginning of the group and single sheets at the end of the group and to distribute them over the two rings. - 5 -
- a practical exemplary embodiment provides that after the individual sheets of the group have passed the first printing unit again, the individual sheets are output or the individual sheets are fed to the second printing unit for printing with the second color on the second side and then output.
- a duplex printing operation is carried out with three times printing and in the second variant, a duplex printing operation with four times printing of the single sheets.
- FIG. 1 schematically shows the structure of a high-performance printer in which the invention is implemented
- FIGS. 2 to 9 operating phases of the duplex printing operation with four times printing
- FIGS. 18 to 28 operating phases with four times printing and alternately feeding single sheets to the first or the second
- FIG. 1 shows a high-performance printer 10 which is used for the rapid printing of single sheets of paper.
- the high-performance printer 10 contains a first, lower printing unit D1 and a second, upper printing unit D2. Both printing units D1, D2 work according to the known electrographic process with the same transfer printing speed.
- the printing units D1, D2 are followed by fixing devices, which are indicated schematically in FIG. 1 by two pairs of rollers 12, 14. A pair is attached to the high-performance printer 10. - 6 -
- the high-performance printer 10 delivers the printed single sheets via the output section 42.
- Transport paths for the transport of the single sheets are arranged in the interior of the high-performance printer 10, through which different operating modes of the high-performance printer are realized.
- the printing units D1, D2 are each assigned transfer printing transport paths 44, 46, which are each set by drives so that the single sheets fed to the printing units D1, D2 have their transfer printing speed. Both transfer printing transport paths 44, 46 are connected to one another via a connecting channel 48.
- the transport path around the first printing unit D1 is supplemented to form a ring Rl by a feed channel 50, via which single sheets can also be fed from the input section 28 to the second transfer printing transport path 46.
- the transport path for the second printing unit D2 is supplemented in a similar manner to form a ring R2 by a discharge channel 52, via which individual sheets printed by the printing unit D1 can be fed to the output section 42.
- a first switch W1 is arranged between the input section 28, the first transfer printing path 44 and the feed channel 50, which enables single sheets to be fed from the input section 28 either to the first transfer printing path 44 or to the feed channel 50. Another variant is that on the feed channel 50 in the direction the soft Wl transported single sheets can be fed to the first transfer printing path 44.
- a second switch W2 and a third switch W3 are arranged at the ends of the connecting channel 48 and connect the adjacent transport paths 44, 48, 52 and 46, 48, 50, respectively.
- a fourth switch W4 is located in the vicinity of the output section 42 and connects the adjacent transport routes.
- the paper output 30 contains a fifth way W5, which works as a turning device. Furthermore, it should also be pointed out to a control device 54 to which reject single sheets are fed via a switch W6.
- Different operating modes of the high-performance printer 10 can be realized by the arrangement described in FIG. These operating modes also include the operating modes relevant here: duplex printing with four printing and duplex printing with three printing.
- FIGS. 2 to 9 show different operating phases in duplex printing with four printing processes. For reasons of clarity, a large number of components which have been explained in connection with FIG. 1 have been omitted from the figures. However, it is easy to see how the operating sequences shown in FIGS. 2 to 9 are realized by the components shown in the more detailed illustration according to FIG.
- the front and the back of the single sheets are printed with image patterns of different colors. It is of course a prerequisite for this that the printing units D1 and D2 can print differently colored print images.
- a group of six single sheets B1 to B6 are fed via the input section 28 and the switch W1 (See FIG. 1 in each case) and moved along the first transfer printing path 44 past the lower printing unit D1, the first page being printed with a first color, indicated by dots. While the first single sheet B1 has almost reached the switch W2 and the connecting channel 48, the last single sheet B6 of the group is still in or in front of the input section 28.
- FIG. 3 shows that the sheets pass through the connecting channel 48 one after the other and are fed to the second printing unit D2 for printing via the second transfer printing transport path 46.
- the connection channel 48 passes through, there is preferably a higher transport speed than the transfer printing speed in order to request the single sheets on the path between the two printing units D1, D2 in the shortest possible time.
- the single sheets Bl to B6 are braked again to the transfer printing speed.
- this second printing process is characterized by long lines.
- FIG. 4 shows the operating phase in which the first single sheet B1 was further requested after printing and turned on the switch W4 with a turning function. Thereafter, the single sheets B1 to B6 are successively requested along the discharge channel 52 again in the direction of the first printing unit Dl. It should be noted that the sixth single sheet B6 is still at a sufficient safety distance in front of the first sheet B1 on the path m in the direction of the connecting channel 48.
- FIG. 5 shows the operating phase in which the sixth single sheet B6 is printed by the second printing unit D2, while the first single sheet B1 has already passed through the connecting channel 48 and is now formed along the feed channel 50. - 9 -
- FIG. 6 shows the first single sheet B1 shortly before it is fed to the first printing unit Dl.
- the conveying speed for the single sheet B1 is set again to the transfer printing speed.
- the other single sheets B2 to B6 are conveyed at an increased speed.
- Figure 7 shows that the single sheets B1 and B2 are printed a third time, i.e. the first printing unit prints the other side of the single sheets, illustrated by dots in FIG. 7.
- the sixth single sheet B6 is still in the connecting channel 48, but has a sufficiently large safety distance from the subsequent single sheet B1.
- FIG. 8 shows the re-feeding of the single sheet Bl and the further single sheets B2 to B6 of the first group to the printing unit D2.
- the fourth print is applied to this printing unit D2.
- the single sheets B1 ', B2', B3 'of the following group are fed to the first transfer printing path 44 on the switch W1.
- the distance between the last single sheet B6 of the first group and the first single sheet B1 'of the second group corresponds to the predetermined distance a of the single sheets at transfer printing speed.
- FIG. 9 shows an operating phase in which the first group of single sheets B1 to B6 are printed by the second printing unit D2 (indicated by horizontal lines in - 10 -
- the turning need not necessarily take place on the turnout W4, but can also be carried out on the turnouts W2, W3 or, if suitably equipped, also on the turnout WL, provided that the associated drive elements can perform a turning function.
- a turning process is explained below using the switch W4.
- the respective single sheet is first transported past the switch W4 on a first transport path in a transport direction in the direction of switch W5.
- the transport direction is then reversed and the respective single sheet is conveyed in the direction of the discharge channel 52.
- a similar function is possible for the other turnouts W1, W2, W3.
- Another variant is to choose the path of the group of single sheets differently, for example by first feeding the group to the printing unit D2, then to the printing unit D1, then, after subsequent turning, again to printing unit D2, then printing unit D1, and the single sheets being output via the discharge channel 52 .
- FIG. 10 shows the feeding of the first group of single sheets B1 to B6 from the paper input 16 to the first printing unit D1, which prints the single sheets B1 to B6 with a first color (shown with dots), for example with a black color.
- the feed speed can be higher than the transfer printing speed, but this higher speed must - 11 -
- FIG. 11 shows the turning of the single sheets on the switch W2 (cf. FIG. 1), the single sheet B1 first being conveyed in the direction of the switch W4, then the direction of transport reversed and the single sheet B1 being transported in the direction of the connecting channel 48.
- a higher transport speed can again be selected.
- FIG. 12 shows that the individual sheets B1 to B6 are conveyed along the first closed transport path R1.
- Figure 13 shows the printing of the back of the single sheets B1 to B6 by the printing unit Dl.
- FIG. 15 shows the printing on one side of the single sheets B1 to B6 by the second printing unit D2.
- the single sheets of the following group are already fed to the first printing unit Dl, i.e. the first single sheet B1 'of the following group follows the last single sheet B6 of the first group.
- FIG. 16 shows the removal of the individual sheets B1 to B6 of the first group into the paper output 30, with no turning and so-called face-down storage.
- the single sheets B1 'to B6' of the following group are in an operating phase, as shown in FIG. 11. - 12 -
- FIG. 17 shows the further depositing of the single sheets B1 to B6 of the first group and the printing of the single sheets B1 'to B6' of the subsequent group.
- the group of single sheets can first be fed to the second printing unit D2 and printed a first time; then the single sheets are fed again along the closed second transport path R2 to the second printing unit D2, the single sheets having been turned beforehand, for example on the switch W4; the single sheets are then fed to the first printing unit D1 via the connecting channel 48 and printed without turning.
- the single sheets printed three times are then output.
- FIGS. 18 to 28 show different operating phases in duplex printing with four printing processes, single sheets being alternately fed to the first transport ring R1 or the second transport ring R2. For reasons of clarity, a large number of components which have been explained in connection with FIG. 1 have been omitted from the figures. However, it is easy to see how the operational sequences shown in FIGS. 18 to 28 are realized by the components shown in the more detailed illustration according to FIG.
- the first page being printed with a first color, indicated by dots. While the first single sheet B1 has almost reached the switch W2 and the connecting channel 48, the last single sheet B1 of the group is still in the paper input 16 before the input section 28.
- FIG. 19 shows that the individual sheets pass through the connecting channel 48 one after the other and are fed to the second printing unit D2 for printing via the second transfer printing transport path 46.
- the connecting channel 48 passes through, there is a higher transport speed than the transfer printing speed in order to convey the individual sheets on the route between the two printing units D1, D2 in the shortest possible time.
- the single sheets B1 to B1 are braked again to the transfer printing speed.
- this second printing process is characterized by longitudinal lines.
- FIG. 20 shows the operating phase in which the first single sheet B1 was conveyed on after printing and turned on the switch W4 with a turning function.
- the individual sheets B1 to B1 are then conveyed one after the other within the ring R2 along the discharge channel 52 in the direction of the first printing unit Dl. It should be noted that the eleventh single sheet B1 is still in the unprinted state before the input section 28 and the single sheet B6 and the following single sheets B7, B8, B9 have not yet passed through the connecting channel 48.
- FIG. 22 shows the operating state in which the single sheet B1 is conveyed in the direction of the first printing unit D1 after leaving the turning point W3.
- the single sheet B6, however, has been promoted in the direction of the printing unit D2.
- the following single sheet B7 is just being deflected by the switch W3 towards the printing unit D2.
- the single sheet B2 has been threaded between the single sheets B7 and B8 and is conveyed upward in the connecting channel 48.
- FIG. 23 shows the first single sheet B1 shortly before it is fed to the first printing unit Dl.
- the conveying speed for the single sheet B1 is set again to the transfer printing speed.
- the further single sheets B2, B3, B4 in the ring R1 are conveyed at an increased speed.
- the single sheet B4 has been inserted on the switch W3 between the single sheets B9 and BIO.
- FIG. 24 shows that the single sheets B1 and B2 are printed for the third time, ie the first printing unit D1 prints on the other side of the single sheets, illustrated by dots in FIG. 8.
- the eleventh single sheet B1 is still in the connecting channel 48 and is deflected in the direction of the printing unit D2 for printing.
- the single sheet B6 is inserted between the single sheets B1 and B1 and is conveyed upward in the connecting channel 48. - 15 -
- the individual sheets can be threaded into the connecting channel 48 without triggering or triggered.
- the untriggered operating mode the individual sheets coming from the ring R2 are threaded into the connecting channel 48 without the individual sheets being stopped.
- This untriggered operating mode will be explained in more detail with the aid of FIGS. 1 and 20 and 21.
- the single sheet B1 is threaded between the single sheets B6 and B7 in the connection channel and is requested upwards and then fed to the printer D1, while the single sheets B6 and B7 are fed to the printing unit D2 (cf. FIGS. 20 and 21).
- the distance between the single sheets from the single sheet B6 is now so large that the single sheet Bl to be threaded is requested at a defined speed on the transport path 52 and can thread between the single sheets B6 and B7 without stopping.
- the switch W3 is actuated when the individual sheets leave the individual sheets in order to alternately feed the successive single sheets to the first or the second printing unit D1 or D2.
- the single sheet Bl and the following single sheets are transported from the switch W6 to the switch W2 at transfer speed, printed on the printing unit Dl for the third time and thread between the single sheets B6 and B7 and the following single sheets, which have a corresponding distance from each other to have.
- the single sheets Bl and the following single sheets are conveyed to the printing unit D2 at increased speed.
- the single sheets are again transported at an increased speed via the switch W4 in the direction of the paper output 30.
- the individual sheets are optionally turned on the switch W5 in order to store them in one of the output compartments 32, 34, 36 with a face down or face up.
- the last single sheet B1 of the first group of single sheets has passed the common path in the connecting channel 48 and the first single sheet B1 'of the subsequent 911 group can be drawn in.
- the flow of single sheets is now closed.
- duplex printing has been described, a predetermined number of individual sheets, preferably eleven, being combined into a group and this group being printed on both sides by the printing units D1 and D2.
- Another mode of operation is possible in which the individual sheets are not transported in groups, but rather a continuous feeding of single sheets.
- This operating mode is called the continuous operating mode. In this continuous mode of operation, only every second single sheet is drawn in from the paper input 16, ie the distance between two successive single sheets drawn in is equal to the respective sheet length plus the nominal distance. The gaps between the single sheets that are created in this way are successively replaced by leading single sheets that have already been printed twice - 21 -
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
- Handling Of Cut Paper (AREA)
- Counters In Electrophotography And Two-Sided Copying (AREA)
- Conveyance By Endless Belt Conveyors (AREA)
- Color Electrophotography (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01122470A EP1174772B1 (de) | 1998-03-31 | 1999-03-31 | Verfahren und Gerät zum Bedrucken von Einzelblättern in Gruppen nach dem Duplexverfahren |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19814384 | 1998-03-31 | ||
DE19814384 | 1998-03-31 | ||
DE19836746 | 1998-08-13 | ||
DE19836746 | 1998-08-13 | ||
PCT/EP1999/002232 WO1999050715A1 (de) | 1998-03-31 | 1999-03-31 | Verfahren zum bedrucken von einzelblättern in gruppen nach dem duplexverfahren |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01122470A Division EP1174772B1 (de) | 1998-03-31 | 1999-03-31 | Verfahren und Gerät zum Bedrucken von Einzelblättern in Gruppen nach dem Duplexverfahren |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1068560A1 true EP1068560A1 (de) | 2001-01-17 |
EP1068560B1 EP1068560B1 (de) | 2002-04-10 |
Family
ID=26045156
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99917943A Expired - Lifetime EP1068560B1 (de) | 1998-03-31 | 1999-03-31 | Verfahren zum bedrucken von einzelblättern in gruppen nach dem duplexverfahren |
EP01122470A Expired - Lifetime EP1174772B1 (de) | 1998-03-31 | 1999-03-31 | Verfahren und Gerät zum Bedrucken von Einzelblättern in Gruppen nach dem Duplexverfahren |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01122470A Expired - Lifetime EP1174772B1 (de) | 1998-03-31 | 1999-03-31 | Verfahren und Gerät zum Bedrucken von Einzelblättern in Gruppen nach dem Duplexverfahren |
Country Status (5)
Country | Link |
---|---|
US (2) | US6259884B1 (de) |
EP (2) | EP1068560B1 (de) |
JP (1) | JP4456757B2 (de) |
DE (2) | DE59913765D1 (de) |
WO (1) | WO1999050715A1 (de) |
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DE10212840A1 (de) * | 2002-03-22 | 2003-10-09 | Oce Printing Systems Gmbh | Verfahren und Einrichtung zum Bedrucken von Einzelblättern mit einer Wendevorrichtung |
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US6980762B2 (en) * | 2003-12-19 | 2005-12-27 | Xerox Corporation | Modular multi-stage fusing system |
US8488184B2 (en) * | 2004-03-18 | 2013-07-16 | Riso Kagaku Corporation | Image forming apparatus having a plurality of individually controlled recording heads |
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US7731184B2 (en) * | 2005-07-15 | 2010-06-08 | Hewlett-Packard Development Company, L.P. | Duplexer |
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DE102006025454B4 (de) | 2006-05-31 | 2013-12-12 | Océ Printing Systems GmbH & Co. KG | Druck- oder Kopiersystem zum Verarbeiten von Einzelblättern mit Bestimmung des kürzestmöglichen Einzugsabstands und Verfahren zum Steuern eines solchen Druck- oder Kopiersystems |
JP5366428B2 (ja) * | 2007-07-23 | 2013-12-11 | 理想科学工業株式会社 | 両面印刷装置 |
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JPH072409A (ja) * | 1993-05-06 | 1995-01-06 | Licentia Patent Verwalt Gmbh | 偏平な発送物の転向装置 |
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EP1068560B1 (de) * | 1998-03-31 | 2002-04-10 | Océ Printing Systems GmbH | Verfahren zum bedrucken von einzelblättern in gruppen nach dem duplexverfahren |
-
1999
- 1999-03-31 EP EP99917943A patent/EP1068560B1/de not_active Expired - Lifetime
- 1999-03-31 DE DE59913765T patent/DE59913765D1/de not_active Expired - Lifetime
- 1999-03-31 US US09/647,432 patent/US6259884B1/en not_active Expired - Fee Related
- 1999-03-31 WO PCT/EP1999/002232 patent/WO1999050715A1/de active Search and Examination
- 1999-03-31 EP EP01122470A patent/EP1174772B1/de not_active Expired - Lifetime
- 1999-03-31 DE DE59901193T patent/DE59901193D1/de not_active Expired - Lifetime
- 1999-03-31 JP JP2000541564A patent/JP4456757B2/ja not_active Expired - Fee Related
-
2001
- 2001-06-08 US US09/877,425 patent/US6647239B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
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See references of WO9950715A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE59913765D1 (de) | 2006-09-21 |
WO1999050715A1 (de) | 1999-10-07 |
US6647239B2 (en) | 2003-11-11 |
JP2002510068A (ja) | 2002-04-02 |
EP1174772B1 (de) | 2006-08-09 |
US20020081120A1 (en) | 2002-06-27 |
DE59901193D1 (de) | 2002-05-16 |
EP1068560B1 (de) | 2002-04-10 |
JP4456757B2 (ja) | 2010-04-28 |
US6259884B1 (en) | 2001-07-10 |
EP1174772A3 (de) | 2002-12-04 |
EP1174772A2 (de) | 2002-01-23 |
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