EP1498372A2 - Method and device for guiding a printed material - Google Patents

Method and device for guiding a printed material Download PDF

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Publication number
EP1498372A2
EP1498372A2 EP04003097A EP04003097A EP1498372A2 EP 1498372 A2 EP1498372 A2 EP 1498372A2 EP 04003097 A EP04003097 A EP 04003097A EP 04003097 A EP04003097 A EP 04003097A EP 1498372 A2 EP1498372 A2 EP 1498372A2
Authority
EP
European Patent Office
Prior art keywords
printing material
air
transport path
characterized
bedruckstoffführung
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.)
Withdrawn
Application number
EP04003097A
Other languages
German (de)
French (fr)
Other versions
EP1498372A3 (en
Inventor
Domingo Rohde
Lars Seimetz
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
NexPress Solutions LLC
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 to DE10331626 priority Critical
Priority to DE2003131626 priority patent/DE10331626B3/en
Application filed by Eastman Kodak Co, NexPress Solutions LLC filed Critical Eastman Kodak Co
Publication of EP1498372A2 publication Critical patent/EP1498372A2/en
Publication of EP1498372A3 publication Critical patent/EP1498372A3/en
Application status is Withdrawn legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/52Stationary guides or smoothers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00Feeding articles separated from piles; Feeding articles to machines
    • B65H5/36Article guides or smoothers, e.g. movable in operation
    • B65H5/38Article guides or smoothers, e.g. movable in operation immovable in operation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00Means using fluid
    • B65H2406/10Means using fluid made only for exhausting gaseous medium
    • B65H2406/11Means using fluid made only for exhausting gaseous medium producing fluidised bed
    • B65H2406/111Means using fluid made only for exhausting gaseous medium producing fluidised bed for handling material along a curved path, e.g. fluidised turning bar
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00Means using fluid
    • B65H2406/30Suction means
    • B65H2406/35Other elements with suction surface, e.g. plate or wall
    • B65H2406/352Other elements with suction surface, e.g. plate or wall facing the edge of the handled material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00Handled material; Storage means
    • B65H2701/10Handled articles or webs
    • B65H2701/13Parts concerned of the handled material
    • B65H2701/132Side portions

Abstract

The present invention relates to a method and a printing substrate guide for guiding at least one edge without contact transported along a transport path substrate in a printing press. If printing material (1) is transported without contact at the edges (5), undesirable movements of these edge regions (5) occur. The edge (5) may begin to flutter or bend undesirably, especially hanging down or beating waves or the like. The object of the invention is achieved in terms of process by the use of a, with respect to the at least one Bedruckstoffrandes (5) at least partially directed outwardly Saugluftströmung (9). The object underlying the invention is also achieved by a Bedruckstoffführung with at least one air intake (8) for sucking air from the region of the transport path of the printing material (1) for generating an at least partially outwardly directed Saugluftströmung (9). <IMAGE>

Description

The present invention relates to a method for guiding transported at least at one edge without contact along a transport path Substrate in a printing machine.

Furthermore, the invention relates to a Bedruckstoffführung for guidance from at least one edge without contact along a transport path transported substrate in a printing press.

In printing machines, especially in electrophotographic printing machines Substrates, such as Sheet of paper, with the help of conveyor belts, Gripper systems or the like transported along a transport path.

The transport of the printing material can be done so that only individual Areas of the substrate with the corresponding transport elements in Come in contact. For example, the substrate may be centered on an electrostatic Transport belt rest and be transported during a Edge or both edges of the substrate remain contact-free.

This freedom of touch of the edges may e.g. when using microwave fixing devices, as proposed in DE 10145005A1 to be necessary. Here, for example, toner can first on the edges of the Substrate are fixed by means of microwaves. Since touches of the printing material immediately behind the microwave applicators to smeared printed images can lead to a non-contact on the edges of the substrates Transport respected. For this purpose, preferably an electrostatic Conveyor belt used for the transport of substrates that is centered to the Substrate is arranged.

If the substrate is transported without contact at the edges, it will happen to unwanted movements of these edge areas. The edge can flutter start or bend undesirably; especially hang down or Waves or something similar.

The unwanted movements can lead to reductions in print quality come. The toner layer may be compromised or within a lithographic or inkjet printing machine may not yet have dry ink run. If the transport path leads through another device, it may due to the movements of the printing substrate edges to touch or impact of the printing material come to existing inlet slots. The substrate may be damaged or may cause a paper jam.

The object of the present invention is therefore a method and a Bedruckstofführung to imagine the unwanted movements of the edges one at least at one edge without contact along a transport path Transported printed material helps prevent.

The object of the invention is procedurally achieved by the use of a at least partially with respect to the at least one printing material edge dissolved outside suction air flow.

By sucking the air in the area of the printing material edges are in prevents significant turbulent flow conditions in these areas and the leadership of Bedruckstoffränder remains stable, or is actively stabilized.

Proportions of this suction air flow pointing in the direction of the transport path, can additionally support the transport movement of the printing material.

In a particularly advantageous embodiment, it is procedurally provided that the Saugluftströmung top and / or bottom of the substrate to be led.

By laminar flows on top and / or bottom of the substrate can the edges are guided stable. In particular, it is possible via regulations these currents, desired curvatures of the printing material edge to produce or to favor. If the suction air flow on one side of the For example, the substrate is reduced (when reduced to zero, it becomes then only on one side led) so the Bedruckstoffrand in the opposite Direction curved.

The problem underlying the invention is also by a Bedruckstoffführung with at least one air intake for sucking of air from the range of the transport path of the printing material for production an at least partially directed outward Saugluftströmung solved.

The advantages of such a suction air flow have already been described.

In an advantageous embodiment of the printing substrate guide, the air suction device for generating a, the substrate on the top and / or bottom side supporting Intake air flow provided.

In this way, as described, the printing material edge to desired Be curved way. Advantageously, a particularly stable shape the Bedruckstoffrandes are generated in the virtually no bends of the edge. Transport through slots, e.g. a microwave device, is then easily possible without the risk of contact. An impairment of the image quality of a print image on the substrate by unwanted movement can be ruled out even safer.

In a particularly advantageous development of the printing material guide, it is provided that the air intake device has an air passage holes, the transport path of the substrate lateral delimiting wall includes.

By Luftdurchlasslöcher it is advantageously possible a more even Suction air flow to create a more stable guidance of Bedruckstoffränder to enable. In particular, it may be possible via local in the Wall differently distributed air passage holes arrangements, the suction air flow vary locally. It can e.g. generally a faster suction air flow be generated above the substrate. So, if necessary is a bending of the printing material edge due to its weight be compensated favorably.

It may also be possible through skillful Luftdurchlasslöcherverteilungen the To better adjust the substrate for changes in the substrate path.

In order to produce the Saugluftströmung even more uniform, it is provided the air intake device has at least one pre-chamber. To this Way can be more uniform over a wider area parallel to the transport path Vacuum are generated, which then again the Saugluftströmung generated.

In an advantageous further development of the printing material guide is at least a, provided on the Saugluftströmung air guide element.

This air guide directs a suction air flow, that they conveniently locally also acts in places that are not directly in the vicinity of the area, in the suction air flow is generated. The Bedruckstoffführung is characterized more flexible in their sphere of influence.

Further, the suction air flow can be better directed thereby, so that Flow conditions can be generated more targeted, the desired Affect the substrate.

To hold the substrate edge in a stable orientation or one it is necessary that the suction air flow can act on the top and / or bottom of the substrate. It is therefore According to the invention provided that at least one, preferably two air guide elements on the upper and / or lower side of the printing substrate, essentially in extend into the area of the transport path parallel to the substrate.

The plane of the spoiler elements must not necessarily parallel to Substrate lie. Deviations from such a parallel plane in the range of several degrees are quite tolerable, a stable guidance of Bedruckstoffrandes remains even then.

Within a printing press, different paper sizes often become or processed substrates with different widths. The substrate guide should therefore be designed so flexible that they both substrates with a maximum intended width, as well as a narrowest provided Lead substrate, or can stabilize their edges.

Device-wise, it is therefore intended that the air guide elements to the Adjacent air intake and into the range of the transport path of the narrowest expected printing material extend and so an extended Provide influence area of the printing material guide.

The air intake laterally limits the transport path and thus limited the possible maximum substrate widths. By the invention Air guide elements, the suction air flow in areas of at least passed an edge of a narrowest to be expected substrate. This can be conveniently performed, or stabilized. In this way can be achieved a wide width flexibility of Bedruckstoffführung.

In an advantageous embodiment of the invention the printing material guide it is provided that the air intake and the air guide elements follow the course of the transport path. The printing material guide can then advantageously at different Transportpfadverläufen for stabilization and guide the Bedruckstoffränder worry. The substrate guide is essentially always in the same plane as the transport path, even if the plane of the transport path is curving or rising other way changes.

For example, the printing material guide can also be a helical one Transport path follow, as in DE 100 59 913 C2 for a turning device is presented.

Within a printing press, substrates can be directed to other levels become. For e.g. a turning device, the transport path, for example have a corresponding radius of curvature. The printing material is then curved accordingly over its surface.

By means of the printing substrate guide according to the invention, the edges of the printing material can be guided stable during this curvature.

An embodiment from which further features of the invention may result, but to which the invention is not limited in scope, is shown in the drawings. They show schematically:

Fig.1
a plan view of a printing material guide,
Fig.2
a cross section through an air intake,
Figure 3
a sketched outline of the printing substrate guide,
Figure 4
a plan view of Bedruckstoffführung with illustrated, possible widths of substrates.

In Fig. 1, a Bedruckstoffführung invention is shown. It deals a plan view. A printing material 1 is placed on a transport path in Transported in the direction of arrow 2. The movement is applied to the substrate 1 transmitted via a conveyor belt 3. The printing material 1 can in principle to different Sages are kept on the conveyor belt 3, for example by means of electrostatic forces. In the transport belt 3 shown here the printing material 1 held on suction conveyor 4 on the conveyor belt 3.

A dashed line edge region 5, hereinafter also as edge 5 or Printed substrate edge 5 denotes the printing material 1 is in the environment of air guide elements 6 and 7. In the plan view selected here is only the upper air guide 6 visible. In Fig. 2, both air guide elements 6, 7 recognizable.

The air guide elements 6, 7 connect to an air intake device 8.

A cross section of the air intake device 8 is shown in FIG. 2.

The printing material 1 is guided on the conveyor belt 3 so that the edge region 5 of the printing material 1 in the middle between the two air guide elements 6 and 7 lies.

In a conventional arrangement of a printing substrate guide, the printing substrate 1 are held alone on the conveyor belt 3. The border areas 5 would be bent on the one hand by their weight down and / or be influenced by turbulent flows so that it is too unwanted Wave formations or other bends would come. The edges 5 of the printing material 1 could also start to flutter.

In the printing material guide shown here, an unwanted bending or a flutter of Bedruckstoffrandes 5 can be successfully avoided.

Between the air guide elements 6 and 7 is a Luftsaugströmung 9 in the direction the edges 5 of the printing material 1 passed. The suction air flow 9 is here symbolically represented by arrows The suction air flow 9 has a stabilizing effect and leading to the printing substrate edges 5 so that they are curved as needed or may also be aligned, with the suction air 9 preferred to stabilize the edges 5 is used. In the illustrated here Case is at least one Bedruckstoffrand 5 flat and parallel to the air guide elements 6.7. The air guide elements 6, 7 adjoin one, the transport path of the 1 printing material bounding wall 10 at. This wall 10 has air passage holes 11 on. The wall 10 is part of the air intake 8.

Following the wall 10, the air intake 8 has an antechamber 12 on. In this antechamber 12 may initially be a uniform Build up negative pressure. About the air passage holes 11 of the wall 10 is then correspondingly uniform air from the area between the air guide elements 6.7 sucked, so that there is a uniform Saugluftströmung 9 can, which ensures a stable guidance of Bedruckstoffrandes 5. A departure of Bedruckstoffrandes 5 of the flat, central position is determined by the continuous Saugluftströmung 9 prevents the top and bottom of the substrate 1.

Thus, a negative pressure can build up within the antechamber 12, air pumped out of this antechamber 12 by means of fans or pumping devices 13. As shown in Fig. 1, a plurality of pumping 13th be used to generate a corresponding negative pressure. There are but also constructions with only one pumping device 13 conceivable.

It is also possible in principle to dispense with the antechamber 12.

A desired curvature of a printing material edge 5 can be achieved by means of the invention Bedruckstoffführung be achieved. For this it is enough from the Suction air flow 9 on the top and / or bottom side of the printing material 1 to be controlled so that by relative pressure differences caused by different flow velocities caused a force on the substrate edge 5 acts, which bends him in the desired manner. For example, this can be the arrangement of the air passage holes 11 in the wall 10 corresponding locally be varied.

A sketched course of a printing material guide is shown in FIG. 3.

The printing substrate 1 follows the transport path of the printing substrate 1. The printing material 1 is in the direction of arrow 2 on the above-described transport elements transported. The transport path points in the example shown here a curved course. Such a course can, for example, within a turning device be present.

Air guide elements 6, 7 are provided on the upper and lower sides of the printing material 1 and shown here in dashed lines. They follow the curved transport path of the Substrate 1. In this way, a stable, guided Bed of printing material 5 can be ensured.

The transport path also remains through during its curved course delimited at least one wall 10, to which the air guide elements 6, 7 adjoin. For a better overview here is the wall 10, however, not shown, they is located between the air guide elements 6,7. The air guide elements 6,7 protrude into the plane of the drawing and over the edge 5 of the printing material. 1

Such an arrangement may be useful, for example, in turning devices be. It is also usable in particular in a turning device DE 100 59 913 C2. Here is proposed a printing substrate 1 between belts to turn. The transport path then has a helical course, then the printing material guide according to the invention can follow.

In general, it is possible that the printing stock guide every possible change of the transport path follows. That way, especially in areas where the transport direction of the printing material 1 is changed a stable leadership of the printing material edge 5 can be achieved.

The substrate guide described here and the use of her generated Saugluftströmung 9 for guiding and stabilizing a Bedruckstoffrandes 5 should act in principle on both edges 5 of a printing material. One Acting on only one edge 5 alone, but then can be quite useful, when the remaining area of the printing material 1 is guided by other elements and / or can be kept.

In Fig. 4 is a plan view is shown on a Bedruckstoffführung, shown in the is over which width range the substrates 1 can vary, so that their edges 5 can still be passed through the Saugluftströmung 9.

The transport path of the printing substrate 1 is laterally through the walls 10 limited. Therefore, the maximum width b of a printing material 1 is characterized limited that the printing material 1 must not bump against a wall 10. One Safety distance in the millimeter range should be maintained.

As long as an edge region 5 of a printing material 1 is still in the area of the air guiding elements 6.7, is, the Saugluftströmung 9 stabilize the edge 5, or to lead. A minimum width a of the printing material 1 therefore results from the Route 1, the air guide elements 6.7 in the transport path of the printing material protrude. The printing material 1 should preferably still from the air guide elements 6.7 are surmounted. A security area in the millimeter range, the the air guide elements 6, 7 project beyond a narrowest printing material 1 to be expected are also recommended here.

As can be seen, the printing substrate guide is very flexible, which is the use for different widths of substrates 1. Alone the route 1, the the air guide elements 6,7 should protrude into the region of the transport path so be selected that even a narrowest to be expected substrate 1 by the suction air flow 9 can be performed.

The distance of the walls 10 from each other should be so large that a substrate 1 with a maximum expected width between the walls 10 fits.

Apart from these considerations, no adjustments are made during the Operation of the printing material guide necessary.

Also different grammages, i. Weights of the substrates used 1 usually require no readjustment of the printing substrate during of the operation.

It is thus a very flexible Bedruckstoffführung for different substrates 1 presented in a simple way a stabilization, or leadership of at least at one edge 5 without contact transported substrates 1 allows. Unwanted movements of the edges 5 can thus ideally be avoided. Other disturbances can be compensated quickly become. Once the Bedruckstoffrand 5 from the middle between the air guide elements 6,7 is moved out, the Saugluftströmung 9 him quickly again lead to a central position. There could be unwanted bending of the edges 5 avoided and desired curvatures, e.g. in operation within one Turning device to be generated selectively. It is not absolutely necessary that the printing material edge 5 is located centrally between the air guide elements 6,7. Other air passage holes arrangements in the wall 10 may also other positions of Bedruckstoffränder 5 between the air guide elements 6.7 be taken, but the central position is preferred.

Furthermore, the substrate guide is also very robust and flexible other unwanted effects. For example, changes affect at the orientation of the air guide elements (6,7) the function of Bedruckstoffführung not essential. A position of the air guide elements (6,7) exactly parallel to the plane of the transport path is for a functioning printing material guide not necessary, to a large extent, alignment changes the air guide elements 6,7 are tolerated over a wide range of degrees.

Claims (10)

  1. Method for guiding printed material (1) transported without contact along a transport path in a printing press, characterized by the use of a suction air flow (9) directed at least partially outwards relative to the at least one printing material edge (5).
  2. A method according to claim 1, characterized in that the suction air flow (9) on top and / or bottom side of the printing material (1) is passed.
  3. Printing material guide for guiding printed material (1) transported without contact along a transport path in a printing press, preferably for carrying out a method according to one of claims 1 and 2, characterized by at least one air suction device (8) for drawing in air from the region of the transport path of the printing material (1) for generating an at least partially outwardly directed suction air flow (9).
  4. Bedruckstoffführung according to claim 3, characterized in that the air suction device (8) for generating a, the printing material (1) upper and / or lower side supporting Saugluftströmung (9) is provided.
  5. Bedruckstoffführung according to at least one of claims 3 and 4, characterized in that the air suction device (8), an air passage holes (11) having, the transport path of the printing material (1) laterally bounding wall (10).
  6. Bedruckstoffführung according to one of claims 3 to 5, characterized in that the air suction device (8) has at least one prechamber (12).
  7. Bedruckstoffführung according to at least one of claims 3 to 6, characterized by at least one, on the Saugluftströmung (9) acting air guide element (6,7).
  8. Bedruckstoffführung according to claim 7, characterized in that at least one, preferably two air guide elements (6,7) upper and / or lower side of the printing material (1), substantially in a plane parallel to the substrate (1) protrude into the region of the transport path.
  9. Bedruckstoffführung according to at least one of claims 3 to 8, characterized in that the air guide elements (6,7) adjacent to the air suction device (8) and protrude into the region of the transport path of the narrowest to be expected printing material (1).
  10. Bedruckstoffführung according to one of claims 3 to 9, characterized in that the air suction device (8) and the air guide elements (6,7) follow the course of the transport path.
EP04003097A 2003-07-12 2004-02-12 Method and device for guiding a printed material Withdrawn EP1498372A3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10331626 2003-07-12
DE2003131626 DE10331626B3 (en) 2003-07-12 2003-07-12 Bedruckstoffführung

Publications (2)

Publication Number Publication Date
EP1498372A2 true EP1498372A2 (en) 2005-01-19
EP1498372A3 EP1498372A3 (en) 2006-05-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04003097A Withdrawn EP1498372A3 (en) 2003-07-12 2004-02-12 Method and device for guiding a printed material

Country Status (4)

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US (1) US7392984B2 (en)
EP (1) EP1498372A3 (en)
JP (1) JP2005029388A (en)
DE (1) DE10331626B3 (en)

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US20080088083A1 (en) * 2006-10-12 2008-04-17 Bowe Bell + Howell Company Apparatuses and methods for registering sheet articles
JP6262468B2 (en) * 2013-08-12 2018-01-17 キヤノンファインテックニスカ株式会社 Sheet processing apparatus and image forming system provided with the same

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DE10145005A1 (en) 2000-12-22 2002-07-11 Nexpress Solutions Llc Method and device for fixing toner on a carrier or a printing material

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DE10059913A1 (en) 2000-05-18 2001-11-22 Nexpress Solutions Llc Turnover device for printed substrates consists of dual belt conveyor system fitted with belt guide rollers
DE10145005A1 (en) 2000-12-22 2002-07-11 Nexpress Solutions Llc Method and device for fixing toner on a carrier or a printing material

Also Published As

Publication number Publication date
US7392984B2 (en) 2008-07-01
DE10331626B3 (en) 2005-01-13
JP2005029388A (en) 2005-02-03
US20050006837A1 (en) 2005-01-13
EP1498372A3 (en) 2006-05-17

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