EP0474971A1 - Device for adjusting web tension in a rotary printing machine - Google Patents

Device for adjusting web tension in a rotary printing machine Download PDF

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Publication number
EP0474971A1
EP0474971A1 EP91108619A EP91108619A EP0474971A1 EP 0474971 A1 EP0474971 A1 EP 0474971A1 EP 91108619 A EP91108619 A EP 91108619A EP 91108619 A EP91108619 A EP 91108619A EP 0474971 A1 EP0474971 A1 EP 0474971A1
Authority
EP
European Patent Office
Prior art keywords
rings
ring
web
slots
expansion elements
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Withdrawn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
EP91108619A
Other languages
German (de)
French (fr)
Inventor
K.L. Ing. Lindblom
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.)
MAN Miller Druckmaschinen GmbH
Original Assignee
MAN Miller Druckmaschinen GmbH
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 MAN Miller Druckmaschinen GmbH filed Critical MAN Miller Druckmaschinen GmbH
Publication of EP0474971A1 publication Critical patent/EP0474971A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/02—Advancing webs by friction roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/11—Details of cross-section or profile
    • B65H2404/112—Means for varying cross-section
    • B65H2404/1121—Means for varying cross-section for changing diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/13—Details of longitudinal profile
    • B65H2404/133—Limited number of active elements on common axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller 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
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/18—Rollers composed of several layers
    • B65H2404/181—Rollers composed of several layers with cavities or projections at least at one layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/18—Rollers composed of several layers
    • B65H2404/185—Rollers composed of several layers easy deformable

Definitions

  • the invention relates to a device for adjusting the web tension of the continuous web material of a web printing machine, in particular an offset web printing machine, with two rings fastened on a common shaft at a distance from one another, which cooperate with two counter rings, which are also fastened on a common shaft at a distance from one another , wherein at least one of the shafts is driven to rotate and the web material passes in the gaps between the opposing rings.
  • the web tension of the web material of a web printing machine is adjusted.
  • the speed of rotation of the shafts of the device is usually adjusted.
  • the object of the invention is to create an additional parameter for setting the web tension of the continuous web material, with which in particular a fine adjustment of the web tension is possible.
  • the invention is characterized in that slots are provided in the shells consisting of elastic-resilient material of at least one of the ring pairs of one of the shafts, under which expansion elements are arranged.
  • the jacket should consist of spring steel or other suitable elastic-springy material.
  • the inner surfaces of the ring sleeves are conical with an angle opening towards the ends, counter surfaces of the expansion elements with a corresponding conicity abutting on the conical inner surfaces and the expansion elements being axially displaceable.
  • the expansion elements are preferably designed as expansion rings.
  • the spreading elements can be axially displaced by means of set screws or adjusting rings, or else by means of other suitable drives, for example by means of a pneumatic or motor drive.
  • the slots can, for example, run spirally because it is essential that the diameter of the ends of the ring jacket change due to the slots can. However, axial alignment of the slots is preferred.
  • Another important embodiment of the invention is characterized in that the surface of the jacket of the rings has an increased coefficient of friction compared to the prior art. This prevents the continuous web material from sliding relative to the surface of the rings and the control of the web tension is also noticeably more precise.
  • rings 2 are seated on both ends.
  • the rings have coats 3 made of resilient material, preferably spring steel.
  • FIG. 1 shows slots above which extend in the longitudinal direction of the rollers. This is also shown in Fig. 2 above.
  • the minimum diameter of the rings is shown on the left in FIG. 1 and the largest diameter on the right in FIG. 1.
  • spreading rings 5 which are adjustable in the axial direction and whose outer surfaces extend outwards, i.e. to the ends, widen conically.
  • the jacket 3 lies against these conical outer surfaces with a correspondingly conical inner surface 6.
  • Screws 7 or nuts 8 can be provided for adjusting the expansion ring 5 in the axial direction.
  • Return screws 9 are provided for returning the expansion elements (ring 5 or nut 8).
  • the rings change their outer diameter accordingly by an axial adjustment of the expansion elements 5, 8, the adjustment of the diameter and thus the circumference of the rings being very fine. It depends on the degree of taper of the abutting surfaces of the expansion elements and the jacket.
  • the diameters of all four rings 2 are preferably adjusted, but at least those of the upper or lower shaft 1.
  • the paper web runs in the gap 10 between the rings 2, the rings transporting the web material at its unprinted edges.
  • the area of the web material located between the rings is not touched by the rings, so that the fresh pressure present there is not smeared.

Landscapes

  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Rotary Presses (AREA)

Abstract

Eine Vorrichtung zur Einstellung der Bahnspannung einer Rollendruckmaschine hat an ihren Ringen (2) Schlitze (4), unter denen Spreizelemente (5) angeordnet sind. Dadurch kann der Durchmesser der Vorrichtung fein verstellt werden und damit die Bahnspannung des durchlaufenden Bahnmaterials. <IMAGE>A device for adjusting the web tension of a web printing press has slots (4) on its rings (2), under which spreading elements (5) are arranged. As a result, the diameter of the device can be finely adjusted and thus the web tension of the web material passing through. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zur Einstellung der Bahnspannung des durchlaufenden Bahnmaterials einer Rollendruckmaschine, insbesondere einer Offset-Rolledruckmaschine, mit zwei auf einer gemeinsamen Welle unter Abstand voneinander befestigten Ringen, die mit zwei Gegenringen zusammenarbeiten, die ebenfalls auf einer gemeinsamen Welle unter Abstand voneinander befestigt sind, wobei wenigstens eine der Wellen auf Drehung angetrieben ist und das Bahnmaterial in den Spalten zwischen den einander gegenüberliegenden Ringen durchläuft.The invention relates to a device for adjusting the web tension of the continuous web material of a web printing machine, in particular an offset web printing machine, with two rings fastened on a common shaft at a distance from one another, which cooperate with two counter rings, which are also fastened on a common shaft at a distance from one another , wherein at least one of the shafts is driven to rotate and the web material passes in the gaps between the opposing rings.

Mit einer derartigen Vorrichtung wird die Bahnspannung des Bahnmaterials einer Rollendruckmaschine eingestellt. Üblicherweise verstellt man hierzu die Drehgeschwindigkeit der Wellen der Vorrichtung.With such a device, the web tension of the web material of a web printing machine is adjusted. For this purpose, the speed of rotation of the shafts of the device is usually adjusted.

Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, einen zusätzlichen Parameter zur Einstellung der Bahnspannung des durchlaufenden Bahnmaterials zu schaffen, mit dem insbesondere eine Feineinstellung der Bahnspannung möglich ist.Proceeding from this prior art, the object of the invention is to create an additional parameter for setting the web tension of the continuous web material, with which in particular a fine adjustment of the web tension is possible.

Zur Lösung dieser Aufgabe ist die Erfindung dadurch gekennzeichnet, daß in den aus elastisch-federnden Material bestehenden Mänteln von wenigstens einem der Ringpaare einer der Wellen Schlitze angebracht sind, unter denen Spreizelemente angeordnet sind.To achieve this object, the invention is characterized in that slots are provided in the shells consisting of elastic-resilient material of at least one of the ring pairs of one of the shafts, under which expansion elements are arranged.

Durch diese Maßnahmen kann man den Durchmesser der Ringe wenigstens einer der Ringpaare, vorzugsweise beider Ringpaare, einstellen. Wenn der aktive Durchmesser der Spreizelemente durch geeignete Maßnahmen vergrößert wird, so vergrößert sich entsprechend auch der Durchmesser der Ringmäntel, weil diese geschlitzt sind, und damit auch der Durchmesser der Ringe.These measures make it possible to set the diameter of the rings of at least one of the pairs of rings, preferably both pairs of rings. If the active diameter of the expansion elements is increased by suitable measures, then The diameter of the ring shells also increases accordingly, because they are slotted, and thus also the diameter of the rings.

Wird der aktive Durchmesser der Spreizelemente wieder verringert, so ziehen sich die geschlitzten Ringmäntel aufgrund ihrer elastisch-federnden Eigenschaften wieder zusammen und verringern dadurch den Durchmesser der Ringe. Aus diesem Grunde soll der Mantel aus Federstahl bestehen oder aus anderem geeignetem elastisch-federndem Material.If the active diameter of the expansion elements is reduced again, the slotted ring sleeves contract again due to their elastic, resilient properties, thereby reducing the diameter of the rings. For this reason, the jacket should consist of spring steel or other suitable elastic-springy material.

Bezüglich der die Veränderung des Durchmessers bewirkenden Spreizelemente wird es bevorzugt, wenn die Innenflächen der Ringmäntel konisch mit einem sich zu den Enden öffnenden Winkel sind, wobei an den konischen Innenflächen Gegenflächen der Spreizelemente mit einer entsprechenden Konizität anliegen und die Spreizelemente axial verschiebbar sind.With regard to the expansion elements causing the change in diameter, it is preferred if the inner surfaces of the ring sleeves are conical with an angle opening towards the ends, counter surfaces of the expansion elements with a corresponding conicity abutting on the conical inner surfaces and the expansion elements being axially displaceable.

Die Spreizelemente sind vorzugsweise als Spreizringe ausgebildet.The expansion elements are preferably designed as expansion rings.

Die axiale Verschiebung der Spreizelemente kann über Stellschrauben oder Stellringe erfolgen, oder auch über andere geeignete Antriebe erfolgen, beispielsweise über einen pneumatischen oder motorischen Antrieb.The spreading elements can be axially displaced by means of set screws or adjusting rings, or else by means of other suitable drives, for example by means of a pneumatic or motor drive.

Für die Rückführung der spreizelemente können Rückholschrauben vorgesehen sein.Return screws can be provided for the return of the expansion elements.

Die Schlitze können beispielsweise spiralig verlaufen, weil es wesentlich ist, daß der Durchmesser der Enden des Ringmantels sich, bedingt durch die Schlitze, verändern kann. Bevorzugt wird allerdings eine axiale Ausrichtung der Schlitze.The slots can, for example, run spirally because it is essential that the diameter of the ends of the ring jacket change due to the slots can. However, axial alignment of the slots is preferred.

Diese können sich auch in radialer Richtung der Welle erstrecken, und zwar alternierend von der Oberseite bzw. Unterseite des Mantels her ausgehend.These can also extend in the radial direction of the shaft, alternately starting from the top or bottom of the jacket.

Eine weitere wichtige Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß die Oberfläche des Mantels der Ringe einen gegenüber dem Stand der Technik erhöhten Reibwert hat. Dadurch wird ein Gleiten des durchlaufenden Bahnmaterials relativ zur Oberfläche der Ringe verhindert und die Steuerung der Bahnspannung wird ebenfalls fühlbar präziser.Another important embodiment of the invention is characterized in that the surface of the jacket of the rings has an increased coefficient of friction compared to the prior art. This prevents the continuous web material from sliding relative to the surface of the rings and the control of the web tension is also noticeably more precise.

Für die angestrebte Erhöhung des Reibwertes gibt es mehrere Möglichkeiten. Bevorzugt wird ein Aufrauhen der Oberfläche des Mantels, das Anbringen von Längsrippen an der Manteloberfläche, ein Oxidieren des Materials der Manteloberfläche und/oder ein Manganisieren des Materials der Manteloberfläche.There are several ways to increase the coefficient of friction. It is preferred to roughen the surface of the casing, to apply longitudinal ribs to the casing surface, to oxidize the material of the casing surface and / or to manganize the material of the casing surface.

Die Erfindung wird im folgenden anhand von Ausführungsbeispielen näher erläutert, aus denen sich weitere wichtige Merkmale ergeben. Es zeigt:

Fig. 1 -
eine Ansicht einer Vorrichtung nach der Erfindung;
Fig. 2 -
eine Stirnansicht der Vorrichtung nach Fig. 1.
The invention is explained in more detail below on the basis of exemplary embodiments, from which further important features result. It shows:
Fig. 1 -
a view of a device according to the invention;
Fig. 2 -
2 shows an end view of the device according to FIG. 1.

Auf einer oberen Welle 1, die mit einstellbarer Geschwindigkeit auf Drehung angetrieben sein kann, sitzen an beiden Enden Ringe 2 auf. Die Ringe haben Mäntel 3 aus elastisch-federndem Material, vorzugsweise aus Federstahl.On an upper shaft 1, which can be driven to rotate at an adjustable speed, rings 2 are seated on both ends. The rings have coats 3 made of resilient material, preferably spring steel.

In den Mänteln sind Schlitze 4 angebracht, wobei Fig. 1 oben Schlitze zeigt, die sich in Längsrichtung der Rollen erstrecken. Dies ist auch in Fig. 2 oben dargestellt.Slots 4 are provided in the sheaths, with FIG. 1 showing slots above which extend in the longitudinal direction of the rollers. This is also shown in Fig. 2 above.

In Fig. 2 unten ist gezeigt, daß sich die Schlitze in radialer Richtung der Rollen erstrecken, und zwar alternierend von der Oberseite bzw. Unterseite des Mantels 3 ausgehend.In Fig. 2 below it is shown that the slots extend in the radial direction of the rollers, alternately starting from the top or bottom of the shell 3.

Links in Fig. 1 ist der Mindestdurchmesser der Ringe gezeigt und rechts in Fig. 1 der größte Durchmesser.The minimum diameter of the rings is shown on the left in FIG. 1 and the largest diameter on the right in FIG. 1.

Zum Verstellen des Durchmessers dienen, wie dies rechts in Fig. 1 gezeigt ist, in axialer Richtung verstellbare Spreizringe 5, deren Außenflächen sich nach außen hin, d.h. zu den Enden, konisch verbreitern. An diesen konischen Außenflächen liegt der Mantel 3 mit einer entsprechend konischen Innenfläche 6 an.To adjust the diameter, as is shown on the right in FIG. 1, there are spreading rings 5 which are adjustable in the axial direction and whose outer surfaces extend outwards, i.e. to the ends, widen conically. The jacket 3 lies against these conical outer surfaces with a correspondingly conical inner surface 6.

Zum Verstellen des Spreizrings 5 in axialer Richtung können Schrauben 7 vorgesehen sein oder Muttern 8 (links in Fig. 1-gezeigt).Screws 7 or nuts 8 (shown on the left in FIG. 1) can be provided for adjusting the expansion ring 5 in the axial direction.

Zum Rückholen der Spreizelemente (Ring 5 oder Mutter 8) sind Rückholschrauben 9 vorgesehen.Return screws 9 are provided for returning the expansion elements (ring 5 or nut 8).

Es ist ersichtlich, daß die Ringe durch eine axiale Verstellung der Spreizelemente 5, 8 ihren Außendurchmesser entsprechend verändern,wobei die Verstellung des Durchmessers und damit des Umfangs der Ringe sehr fein ist. Die hängt vom Grad der Konizität der aneinander anliegenden Flächen der Spreizelemente und des Mantels ab.It can be seen that the rings change their outer diameter accordingly by an axial adjustment of the expansion elements 5, 8, the adjustment of the diameter and thus the circumference of the rings being very fine. It depends on the degree of taper of the abutting surfaces of the expansion elements and the jacket.

Vorzugsweise wird man die Durchmesser aller vier Ringe 2 verstellen, wenigstens aber diejenigen der oberen oder der unteren Welle 1.The diameters of all four rings 2 are preferably adjusted, but at least those of the upper or lower shaft 1.

Die Papierbahn läuft im Spalt 10 zwischen den Ringen 2 hindurch, wobei die Ringe das Bahnmaterial an seinen unbedruckten Rändern transportieren.The paper web runs in the gap 10 between the rings 2, the rings transporting the web material at its unprinted edges.

Der zwischen den Ringen befindliche Bereich des Bahnmaterials wird von den Ringen nicht berührt, so daß der dort vorhandene frische Druck nicht verschmiert wird.The area of the web material located between the rings is not touched by the rings, so that the fresh pressure present there is not smeared.

Claims (10)

Vorrichtung zur Einstellung der Bahnspannung des durchlaufenden Bahnmaterials einer Rollendruckmaschine, insbesondere einer Offset-Rollendruckmaschine, mit zwei auf einer gemeinsamen Welle unter Abstand voneinander befestigten Ringen, die mit zwei Gegenringen zusammenarbeiten, die ebenfalls auf einer gemeinsamen Welle unter Abstand voneinander befestigt sind, wobei wenigstens eine der Wellen auf Drehung angetrieben ist und das Bahnmaterial in den Spalten zwischen den einander gegenüberliegenden Ringen durchläuft,
dadurch gekennzeichnet,
daß in den aus elastisch-federnden Material bestehenden Mänteln von wenigstens einem der Ringpaare (2,2) einer der Wellen (1,1) Schlitze (4) angebracht sind, unter denen Spreizelemente (5) angeordnet sind.Device for adjusting the web tension of the continuous web material of a web printing machine, in particular an offset web printing machine, with two rings fastened on a common shaft at a distance from one another, which cooperate with two counter rings, which are also fastened on a common shaft at a distance from one another, at least one the shafts are driven to rotate and the web material passes through the gaps between the opposing rings,
characterized,
that slots (4) are provided in the shells consisting of resilient material of at least one of the pairs of rings (2,2) of one of the pairs of rings (2,2), under which spreading elements (5) are arranged. Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Innenflächen der Ringmäntel konisch mit einem sich zu den Enden öffnenden Winkel sind, wobei an den konischen Innenflächen Gegenflächen der Spreizelemente (5) mit einer entsprechenden Konizität anliegen und die Spreizelemente (5) axial verschiebbar sind.Device according to claim 1,
characterized,
that the inner surfaces of the ring jackets are conical with an angle opening towards the ends, counter surfaces of the expansion elements (5) bearing on the conical inner surfaces with a corresponding conicity and the expansion elements (5) being axially displaceable. Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß die Spreizelemente als Spreizringe (5) ausgebildet sind.Device according to claim 2,
characterized,
that the expansion elements are designed as expansion rings (5). Vorrichtung nach einem der Ansprüche 2 oder 3,
dadurch gekennzeichnet,
daß die axiale Verschiebung der Spreizelemente (5) über Stellschrauben (7) oder Stellringe (8) erfolgt.Device according to one of claims 2 or 3,
characterized,
that the axial displacement of the expansion elements (5) via adjusting screws (7) or adjusting rings (8). Vorrichtung nach einem der Ansprüche 2 bis 4,
dadurch gekennzeichnet,
daß Rückholschrauben (9) vorgesehen sind.Device according to one of claims 2 to 4,
characterized,
that return screws (9) are provided. Vorrichtung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß sich die Schlitze (4) in axialer Richtung des Ringes erstrecken.Device according to one of claims 1 to 5,
characterized,
that the slots (4) extend in the axial direction of the ring. Vorrichtung nach Anspruch 6,
dadurch gekennzeichnet,
daß sich die Schlitze (4) auch in radialer Richtung des Ringes erstrecken, und zwar alternierend von der Oberseite bzw. Unterseite des Ringmantels (3) her ausgehend.Apparatus according to claim 6,
characterized,
that the slots (4) also extend in the radial direction of the ring, alternately starting from the top or bottom of the ring jacket (3). Vorrichtung nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet,
daß die Oberflächen der Ringe einen hohen Reibwert haben.Device according to one of claims 1 to 7,
characterized,
that the surfaces of the rings have a high coefficient of friction. Vorrichtung nach Anspruch 8,
dadurch gekennzeichnet,
daß die Oberfläche der Ringe aufgerauht ist, Längsrippen hat, oxidiert ist und/oder manganisiert ist.Device according to claim 8,
characterized,
that the surface of the rings is roughened, has longitudinal ribs, is oxidized and / or is manganeseized. Vorrichtung nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet,
daß die Drehgeschwindigkeit wenigstens einer der Wellen (1) mit ihren Ringen (2) einstellbar ist.Device according to one of claims 1 to 9,
characterized,
that the rotational speed of at least one of the shafts (1) with its rings (2) is adjustable.
EP91108619A 1990-08-18 1991-05-28 Device for adjusting web tension in a rotary printing machine Withdrawn EP0474971A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4026238 1990-08-18
DE4026238A DE4026238C1 (en) 1990-08-18 1990-08-18

Publications (1)

Publication Number Publication Date
EP0474971A1 true EP0474971A1 (en) 1992-03-18

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ID=6412523

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Application Number Title Priority Date Filing Date
EP91108619A Withdrawn EP0474971A1 (en) 1990-08-18 1991-05-28 Device for adjusting web tension in a rotary printing machine

Country Status (4)

Country Link
US (1) US5127323A (en)
EP (1) EP0474971A1 (en)
JP (1) JPH04251063A (en)
DE (1) DE4026238C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0970807A1 (en) * 1998-07-06 2000-01-12 Heidelberger Druckmaschinen Aktiengesellschaft Roller having a variable diameter

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0747312B1 (en) * 1995-06-05 1999-01-20 Heidelberger Druckmaschinen Aktiengesellschaft Folding apparatus superstructure
US5927197A (en) * 1998-07-09 1999-07-27 Troy Systems, Inc. Tensioner and system for continuous printer sheet advancement
ITRM20080473A1 (en) * 2008-08-29 2010-02-28 Gep Spa TRACTOR DRIVING SYSTEM FOR LOW RIGIDITY PAPER MIVIMENTATION
DE102010046962A1 (en) * 2010-09-29 2012-04-26 Eastman Kodak Co. Transport arrangement for substrates in a printing press

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Publication number Priority date Publication date Assignee Title
US2765165A (en) * 1952-07-02 1956-10-02 Harris Seybold Co Web tension control means
GB2081240A (en) * 1980-08-01 1982-02-17 Atomic Energy Authority Uk Silicon Carbide Bodies
US4403721A (en) * 1981-06-05 1983-09-13 Kyoichi Yamashita Variable diameter drum
US4875611A (en) * 1987-12-10 1989-10-24 Xerox Corporation Roll media feed roll system

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Publication number Priority date Publication date Assignee Title
US3203345A (en) * 1961-11-08 1965-08-31 Gibbons A Lucile Rotary bag printer
US3537631A (en) * 1968-05-14 1970-11-03 Bell Sound Studios Inc Idler roller
JPS5318780B2 (en) * 1972-04-26 1978-06-16
US4205770A (en) * 1978-05-15 1980-06-03 Ncr Corporation Selective feeding of record media
JPS5969334A (en) * 1982-10-05 1984-04-19 Seiko Instr & Electronics Ltd Paper feeding mechanism for printer
US4961378A (en) * 1987-05-27 1990-10-09 Rockwell International Corporation Anti-wrap up device for web fed printing presses

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2765165A (en) * 1952-07-02 1956-10-02 Harris Seybold Co Web tension control means
GB2081240A (en) * 1980-08-01 1982-02-17 Atomic Energy Authority Uk Silicon Carbide Bodies
US4403721A (en) * 1981-06-05 1983-09-13 Kyoichi Yamashita Variable diameter drum
US4875611A (en) * 1987-12-10 1989-10-24 Xerox Corporation Roll media feed roll system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0970807A1 (en) * 1998-07-06 2000-01-12 Heidelberger Druckmaschinen Aktiengesellschaft Roller having a variable diameter

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JPH04251063A (en) 1992-09-07
DE4026238C1 (en) 1991-12-19
US5127323A (en) 1992-07-07

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