EP0871928A2 - Dispositif permettant de retourner ou de deplacer une bande de materiau d'enregistrement continu - Google Patents

Dispositif permettant de retourner ou de deplacer une bande de materiau d'enregistrement continu

Info

Publication number
EP0871928A2
EP0871928A2 EP96932434A EP96932434A EP0871928A2 EP 0871928 A2 EP0871928 A2 EP 0871928A2 EP 96932434 A EP96932434 A EP 96932434A EP 96932434 A EP96932434 A EP 96932434A EP 0871928 A2 EP0871928 A2 EP 0871928A2
Authority
EP
European Patent Office
Prior art keywords
web
edge
deflection
guide surface
guide
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
Application number
EP96932434A
Other languages
German (de)
English (en)
Other versions
EP0871928B1 (fr
Inventor
Günther GASSNER
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 EP0871928A2 publication Critical patent/EP0871928A2/fr
Application granted granted Critical
Publication of EP0871928B1 publication Critical patent/EP0871928B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6517—Apparatus for continuous web copy material of plain paper, e.g. supply rolls; Roll holders therefor
    • G03G15/6526—Computer form folded [CFF] continuous web, e.g. having sprocket holes or perforations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/32—Arrangements for turning or reversing webs
    • 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
    • G03G15/237—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 the image receiving member being in form of a continuous web
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00443—Copy medium
    • G03G2215/00451—Paper
    • G03G2215/00455—Continuous web, i.e. roll
    • G03G2215/00459—Fan fold, e.g. CFF, normally perforated
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00919—Special copy medium handling apparatus
    • G03G2215/00924—Special copy medium handling apparatus two or more parallel feed paths

Definitions

  • the invention relates to a device for turning and moving a web of endless recording material, in particular a paper web in an electrographic printer.
  • the invention further relates to a device in which the web of continuous recording material is only offset in parallel.
  • Devices of this type are important components of an electrographic printing device for printing on tape-shaped recording media of different bandwidth.
  • a printing device is described, for example, in WO / 94 27193.
  • the printing device has an electrographically operating intermediate carrier, for example a photoconductor drum, with a usable width corresponding to twice the width format of a standard form, for example DIN A4 or letter-size format.
  • the other units such as the fixing station, the developer station, the cleaning station, etc. are also designed for this usable width.
  • simplex operation For the sake of completeness, reference is made to simplex operation and parallel simplex operation.
  • simplex operation a recording medium with up to twice the width of an A4 sheet or a sheet with letter-size format is printed in a conventional manner.
  • parallel simplex operation two separate tracks, e.g. each with a width in accordance with DIN A4 or letter-size format, guided and printed in the side-by-side position through the printing device.
  • a turning device for tape-shaped recording media in which deflection elements for deflecting the web are arranged in a W-shape. The web is fed taut through the turning device and is in close contact with the deflection units.
  • a turning device for tape-shaped recording media is known, the deflection elements of which form two turning triangles. The turning triangles are rotated relative to each other by an expansion angle, so that the entire turning device takes up little space.
  • this web in which the web is used and displaced, this web is loosely guided around a deflecting device, the first edge being fed obliquely downward from above to the deflecting device and coming obliquely upward there from below is discharged again.
  • the edge lies against the first guide surface of the deflection device, so that a natural loop formation is formed from the web feed device to the web delivery device. Since this first edge lies loosely against the first guide surface, the web loop can be in the vertical direction
  • Execute deflection movements and thus compensate for fluctuations in the transport speed in the region of the deflection device.
  • Such fluctuations can arise, for example, from changes in the friction conditions or from wrinkles.
  • the invention is suitable both for sheets of continuous material without transverse folds and for sheets with folds (fan-fold sheets).
  • the web surface comes into frictional contact with only a few elements. This reduces the risk of web congestion as a result of different friction conditions or damage to the web.
  • the surfaces of the mechanical guides in contact with the web can be provided with very low-friction surfaces or can be made wear-resistant by surface treatment. This further increases the operational safety of the device.
  • the first guide surface is preferably convex. It is therefore adapted to the curvature of the geometry of the web loop which is self-forming due to the weight of the web and its elasticity and supports the natural formation of the loop.
  • An embodiment of the invention is characterized in that the elongate body of the deflection device has a second guide surface in its upper region, which guides and holds down the second edge of the web opposite the first edge when the web rises around the body during circulation and a exceeds a predetermined height.
  • the upper, second edge of the track comes to rest against the second guide surface from a predetermined height, whereupon the tensile stress at the second edge of the Web is enlarged and the web tightens and unfolds. Disruptions in the passage of the web are thus automatically compensated for.
  • the height of the first and second guide surfaces can be adjusted.
  • the deflection device can be adapted to different widths of the web.
  • the height adjustment enables adaptation to the length of the web loop from the web feed device to the web delivery device.
  • This web loop also serves as a web store, the length of which is set as a function of the length format used for the web of the web and is specified by the printer controller or the operating personnel.
  • a device for displacing a web of endless recording material is provided with the features of claim 12. With this facility, the web is not turned. The device is designed so that the web forms a loosely hanging web loop. The web is guided in such a way that the first edge of the supplied web facing the web delivery device is discharged approximately in the transport direction along a second transport path on the side facing away from the web supply device. The upper side of the track on the second transport track and the top of the track on the first transport track match. This device is therefore used for two-color simplex operation.
  • the web removal device includes a guide element, which is arranged at least approximately in a horizontal plane and has a guide surface over which the web is guided after passing through the web loop, the longitudinal axis of the guide surface having the length projected into the horizontal plane - Axis of the web feed device includes an angle in the range from 15 ° to 25 °, preferably 20 °. Due to its oblique arrangement, this guide element enables the natural loop shape to be retained and small radii of curvature to be avoided when deflecting into the parallel offset transport path, which can cause wrinkling. When using folded recording material, the guide element prevents the web from buckling at the folds.
  • the web leaving the guide elements is fed directly from below to a deflecting element which deflects the web in the direction of the web loop.
  • the deflecting element has a longitudinal axis which is at least approximately parallel to the longitudinal issue of the web feed device. The deflecting element prevents a curvature of the web, which can result from the web being offset by at least one web width.
  • the guide element and preferably also the deflecting element on the side facing the web feed device can have a stop against which the edge of the web lies. This results in defined edge positions of the web and precise guidance.
  • FIG. 1 shows a high-performance printer in the duplex mode with a turning device
  • FIG. 2 shows the high-performance printer in the two-color simplex printing mode with a displacement device
  • FIG. 3 shows a schematic illustration of a turning device according to the invention
  • FIG. 4 shows the turning device according to FIG. 3 in a top view
  • FIG. 5 shows several exemplary embodiments for a deflection device
  • FIG. 6 an embodiment of the web guiding device
  • FIG. 7 a guide element for feeding a first web section during the insertion operation
  • FIG. 8 shows an exemplary embodiment for a displacement device
  • FIG. 9 shows the displacement device according to FIG. 8 in a top view
  • FIG. 10 variants of the paper feed for a displacement device according to the invention.
  • FIG. 1 shows the high-performance printer in duplex mode, in which a single web 8 is printed on its front and back.
  • the printer has a transport device 10 which, arranged near a printing unit 12, requests the web 8 through the printing unit 12, in which a charge image applied to a photoconductor drum 14 and colored with toner is transferred to the web 8 by means of a corona device (not shown). Subsequently, the web 8 is fed to a fixing station 16, in which the still smearable toner image is connected to the carrier material in a wipe-proof manner with the aid of pressure and temperature.
  • the web 8 is fed to the printing unit 12 with a first web section A starting from a first stack 22. After printing and fixing, the web 8 is fed to a turning device 18 via a deflection unit 20. This turning device 18 turns the web 8 and laterally displaces it by at least one web width, so that the back of the web 8 can now be fed as web section B to the printing unit 12 for printing.
  • the printed web section B is also fed to the fixing station 16, which connects the printed image on the back of the web 8 to the surface of the carrier material in a wipe-proof manner.
  • the web 8 is then stacked on a stack 24.
  • the transport unit 10, the printing unit 12, the photoconductor drum 14 and the fixing station 16 have a working width of at least twice the web width of the web 8.
  • the printer is equipped with an photoconductor drum 14.
  • a band-shaped intermediate carrier e.g. em OPC tape or a magneto-style arrangement can be used.
  • Other units for the electrographic printing process are grouped around the photoconductor drum 14. These units and the structure of the entire printer smd are described in more detail in German patent application P 44 35 756.7, the disclosure content of which is included in the present application.
  • FIG. 2 shows the printer in two-color simplex mode, in which the front side of the web 8 has a first color and a first color when it passes the printing unit 12 for the first time subsequent second passage past the printing unit 12 is printed with a second color. Since the front side of the web 8 is to be printed in each of the two revolutions, an offset device 26 is provided at the separation point between the web sections A and B, which offset the web 8 in parallel by at least one web width, but does not turn it.
  • the web 8 is in stack form.
  • web 8 is often wound on a roll. Both folded webs (fan-fold webs) and smooth webs without folds can be processed.
  • FIG. 3 schematically shows an exemplary embodiment of the turning device 18 for the printer, which works in duplex mode.
  • the web 8 is fed along a first transport path 30 (details of this transport path 30 have been omitted in the figures for reasons of better clarity) from a transport direction according to the arrow 32 via a web feed device 34.
  • this web feed device 34 is realized by a roller.
  • the web feed device 34 can contain several rollers and deflection units in order to realize a special web feed depending on the geometric conditions of the printer.
  • the web 8 has a front face marked by crosses 35 and a rear face marked by circles 36.
  • the web 8 is loosely guided around a deflection device 40 arranged vertically below the web feed 34, so that its edge 38 lies loosely against a guide surface 42 of the deflection device 40.
  • the front of the web 8 faces this guide surface 42.
  • the web 8 is guided obliquely upwards to the web delivery device 44 and is deflected there into a second transport path 46 which is arranged parallel to the first transport path 30.
  • the edge 38 faces the web feed device 34.
  • the direction of transport (arrow 48) of the transport path 46 coincides approximately with the transport direction (arrow 32) of the transport path 30. Both transport tracks 30, 46 require the track 8 downstream in the direction of the printing unit of the printer.
  • the axes 48, 50 of the web delivery device 44 and of the web feed device 34 are aligned parallel to one another.
  • the longitudinal axis 52 of the deflection device 40 is arranged vertically.
  • a stable web loop 54 is further supported by a web guide device 56, which has a concavely curved guide plate 58 and a movable support element 60, which is fixed at each end.
  • the guide plate 58 is arranged just below the web feed device 34 and has a width at least equal to the web width of the web 8
  • Support element 60 can be formed by a number of spiral springs arranged next to one another (not shown). The support element 60 rests with friction on the front of the web 8 and moves it against the guide plate 58. This counteracts any bulging of the recording material, which can occur in particular at fold points of the web 8, and the web run in the initial region of the web loop 54 is calmed down.
  • FIG. 4 shows a plan view of the turning device 18 according to FIG. 3.
  • the deflection device 40 is cylindrical in this case and can be realized, for example, through a tube. s sem.
  • other shapes for the deflecting device are also conceivable; it is only essential that the guide surface 42 is convexly curved in order to support the formation of a round, natural web loop 54.
  • the web delivery device 44 has a stop 62 on the side facing the web feed device 34, against which the edge 38 of the web 8 bears. In this way, a precise alignment of the web 8 is possible for its further transport.
  • FIG. 5 shows further embodiments a, b, c of the deflection device 40.
  • the embodiment a has a lower cylindrical section 64, which provides the curved guide surface 42.
  • two arms 66, 68 are flanged, which extend at an angle of approximately 45 ° to the longitudinal axis of the deflection device 40. These arms 66, 68 have the function of preventing the web 8 from rising. Such an ascent can occur when the friction on the guide surface 42 fluctuates or when the web 8 buckles on folds.
  • the arms 66, 68 form second guide surfaces for the upper edge of the web 8 and stabilize the shape of the web loop 54.
  • the cylindrical section 64 can be adjusted in height relative to a base 70, as indicated by the double arrow 72.
  • the height adjustment can take place depending on the required length of the web loop for a web storage function and depending on the length of the form of web 8.
  • the exemplary embodiment b in FIG. 5 shows a composite rotational body, the rotating surface of which is an ellipse 74 and a rectangle 76.
  • the exemplary embodiment c in FIG. 5 shows a composition of a truncated cone 78 and a cylinder 80
  • Truncated cone 78 has the same function as that of arms 66, 68 according to exemplary embodiment a, its upper guide surface being enlarged.
  • FIG. 6 shows an exemplary embodiment of the web guiding device 56.
  • an end cloth 84 is fastened movably with one end 84.
  • the other end 86 lies on the surface of the web 8 and thus soothes transport movements of the web 8.
  • a felt cloth or a rubber blanket can also be used.
  • a guide element 90 is shown in FIG.
  • This guide element 90 is arranged radially at a distance from the deflection device 40 below the web feed device 34.
  • This guide element 90 has an approximately upright, concavely curved guide surface 92 with a support edge 94 projecting approximately vertically in the lower region.
  • the guide element 90 serves to guide an initial section of the web 8 around the deflection device 40 when it is inserted. In the inserting operation, the initial section is fed via the web feed device 34 and reaches with its edge 38 the contact edge 94, along which it moves as web 8 is further challenged.
  • the surface of the web 8 lies against the curved guide surface 92, so that a curvature of the web 8 arises and its front edge is guided past the deflection device 40. An operator can now grasp this front edge of the web 8 and insert the web 8 into the web delivery device 44 while forming the web loop 54.
  • the guide element 90 avoids a web jam during the insertion operation and makes it easier for an operator to embroider.
  • FIG. 8 shows the displacement device 26 for displacing a web 8 by at least one web width.
  • the web 8 is fed along the first transport path 30 from the transport device 32 through the web feed device 34.
  • the transport roller 34 has Bahnzuschreibvomchtung backpressure ⁇ rolls 96, prevent the em upgrade of the web.
  • the web 8 with its outer edge 38 is fed to a guide element 98 with the formation of the web loop 54 so that the edge 38 faces the web feed device 34.
  • the web 8 slides over a guide surface 100 of the guide element 98, which is convexly curved. In the present case, the guide element 98 has a cylindrical surface.
  • the web 8 is fed to a deflection element 102.
  • 102 has an axis 104 which is arranged parallel to the axis 50 of the web feed device 34.
  • the guide element 98 can be pivoted in a horizontal plane by an angle according to the double arrow 106.
  • the oblique arrangement of the guide element 98 keeps the shape of the web loop 54 stable.
  • the arrangement of the deflecting element 102 m near the guide element 98 results in a deflection of the web 8 with a relatively large radius of curvature, so that the web 8 is not creased or wrinkled.
  • the web 8 is then guided to any further elements of the web delivery device 44.
  • the deflecting element 102 has on its side facing the web feed device 34 the stop 62 which serves for precise edge guidance.
  • the guide element 98 can be provided with a corresponding stop on its right side.
  • the stop 62 can be designed so that it is displaceable in the direction of the axis 104 in order to be adapted to the width of the web.
  • FIG. 9 shows a top view of the displacement device 26 according to FIG. 8.
  • the guide element 98 in FIG Deflection element 102 are pivoted so that its axis 99 lies with the axis 104 in a vertical plane.
  • the unit formed from guide element 98 and deflecting element 102 forms a guide device for guiding the web 8.
  • This unit can be used in a turning device 18 according to FIG. 3 as part of the web delivery device 44 shown there.
  • FIG. 9 also shows a top view of the web guiding device 56, which, as already mentioned, serves to calm the web run and to form the web loop 54.
  • FIG. 10 shows different variants of the web feed and the web removal for the transfer device 26.
  • the web 8 arriving from the direction according to arrow 32 along the transport web 30 is further requested after passing through the web loop 54 via a further deflection roller 106 in the same transport direction (arrow 48).
  • the deflection roller 106 is part of the web removal device 44 with the further components guide element 98 and deflection element 102.
  • Further variants of the web supply are shown in dashed lines in FIG.
  • a web 8 fed from the right according to arrow 108 or a web 8 fed from above (arrow 110) is output to the left via the deflection roller 106 according to arrow 112.
  • the transport directions are generally determined in such a way that the web 8 is requested downstream in the direction of the printing unit.
  • the deflecting element 102 can be pivoted vertically upward about an axis of rotation 113 in the direction of the arrow 114. The operator can then guide the initial section of the web 8 around the deflection roller 106 in the insertion mode and then pivot the deflection element 102 back into the position shown in FIG.
  • Components of the turning device 18 and the displacing device 26 shown in FIGS. 3 to 10 can be combined with one another.
  • a deflection device of the type of the deflection device 40 shown in FIG. 3 can be included.
  • Such an arrangement then has the function of a turning device.
  • the device according to FIG. 10 can be converted into a turning device or a transfer device in a relatively short time.

Abstract

L'invention concerne un dispositif permettant de retourner et de déplacer une bande (8) de matériau d'enregistrement continu, notamment une bande de papier dans une imprimante électrographique. La bande (8) est acheminée depuis une première direction de transport (32) le long d'un premier parcours de transport (30) par un dispositif d'alimentation (34) et est déplacée d'au moins une largeur de bande par un dispositif de décharge de bande (44), après être passée autour d'un dispositif de renvoi (40) monté en dessous du dispositif d'alimentation (34) et après lui, vu dans le sens de transport. Le premier bord (38) de la bande (8) acheminée, qui fait face au dispositif de décharge de la bande (44), repose de manière lâche sur une première surface de guidage (42) du dispositif de renvoi (40). L'invention concerne en outre un dispositif de déplacement qui déplace la bande (8) d'une largeur de bande sans la retourner.
EP96932434A 1995-10-27 1996-08-02 Dispositif permettant de retourner ou de deplacer une bande de materiau d'enregistrement continu Expired - Lifetime EP0871928B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19540134 1995-10-27
DE19540134 1995-10-27
PCT/DE1996/001449 WO1997018951A2 (fr) 1995-10-27 1996-08-02 Dispositif permettant de retourner ou de deplacer une bande de materiau d'enregistrement continu

Publications (2)

Publication Number Publication Date
EP0871928A2 true EP0871928A2 (fr) 1998-10-21
EP0871928B1 EP0871928B1 (fr) 2001-11-21

Family

ID=7775993

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96932434A Expired - Lifetime EP0871928B1 (fr) 1995-10-27 1996-08-02 Dispositif permettant de retourner ou de deplacer une bande de materiau d'enregistrement continu

Country Status (4)

Country Link
US (1) US6027003A (fr)
EP (1) EP0871928B1 (fr)
DE (2) DE29622735U1 (fr)
WO (1) WO1997018951A2 (fr)

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Also Published As

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DE59608281D1 (de) 2002-01-03
US6027003A (en) 2000-02-22
WO1997018951A2 (fr) 1997-05-29
EP0871928B1 (fr) 2001-11-21
DE29622735U1 (de) 1997-07-17
WO1997018951A3 (fr) 1997-07-31

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