EP0741014B1 - Mécanisme d'alimentation pour une machine à imprimer le papier ou similaire - Google Patents

Mécanisme d'alimentation pour une machine à imprimer le papier ou similaire Download PDF

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Publication number
EP0741014B1
EP0741014B1 EP96303001A EP96303001A EP0741014B1 EP 0741014 B1 EP0741014 B1 EP 0741014B1 EP 96303001 A EP96303001 A EP 96303001A EP 96303001 A EP96303001 A EP 96303001A EP 0741014 B1 EP0741014 B1 EP 0741014B1
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EP
European Patent Office
Prior art keywords
shaft
line
infeed mechanism
phase
mechanism according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96303001A
Other languages
German (de)
English (en)
Other versions
EP0741014A2 (fr
EP0741014A3 (fr
Inventor
Andrew Steven
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.)
Crabtree of Gateshead Ltd
Original Assignee
Crabtree of Gateshead Ltd
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 Crabtree of Gateshead Ltd filed Critical Crabtree of Gateshead Ltd
Publication of EP0741014A2 publication Critical patent/EP0741014A2/fr
Publication of EP0741014A3 publication Critical patent/EP0741014A3/fr
Application granted granted Critical
Publication of EP0741014B1 publication Critical patent/EP0741014B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/02—Conveying or guiding webs through presses or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/008—Mechanical features of drives, e.g. gears, clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/51—Presence
    • B65H2511/512—Marks, e.g. invisible to the human eye; Patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/30—Forces; Stresses
    • B65H2515/31—Tensile forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/51—Encoders, e.g. linear

Definitions

  • This invention relates to an infeed mechanism for a paper press or the like, hereinafter referred to as a press, and particularly for a press designed to print a repeated pattern on a continuous web of paper and/or to process such web by, for example, repeatedly sprocket hole punching, perforating, and rolling, folding, or cutting it.
  • a typical but not exclusive product of such a press is multiple copy business forms.
  • Such a press has a line-Shaft for driving its printing and/or processing units in synchronisation, and also a web infeed mechanism with two functions.
  • the first function is to control lengthwise stretching of the web of paper on an initial pass through the machine by carefully modulating the rotation ratio between the line-shaft and a friction cylinder of the infeed mechanism around which the web passes without slipping. This ratio control is responsible for determining the page length of the web when measured in its relaxed condition.
  • the second function of the infeed mechanism is to control the position or phase of the web of paper when it is re-inserted for subsequent printing. This effectively positions the new print relative to the existing print.
  • the friction cylinder of the infeed mechanism has manually been driven independently by an electric motor so controlled as to regulate all aspects of the paper feed, that is to say both phase-synchronising and speed.
  • the necessary signals for controlling the motor have been provided by a microprocessor-based combined phase-synchronising and ratio-modulating controller. Due to the independent nature of the friction cylinder drive, and also to other transmission errors, for instance in toothed belt drives hitherto employed, this existing arrangement has only been able to control the accuracy of the aforesaid functions to within about 0.5 millimetres.
  • US-A-4 896 808 does disclose an infeed mechanism for controlling solely the tension of a web fed to a printing machine having a main line-shaft and a web traction roller, a compound gear which drives said roller being driveably connected both to the line-shaft and to a servomotor operable by signals generated by an analogue photoelectric detector in proportion to deflection of a tensioning or dancer roller.
  • the object of the present invention is to provide an improved infeed mechanism which is able to control both of the aforesaid functions with superior accuracy.
  • the friction cylinder is arranged to be driven directly from the line-shaft.
  • the friction cylinder is driven from the line-shaft by way of a phase-shifting gearbox in series with a bevel gearbox.
  • the friction cylinder is supported between the output shaft of the bevel gearbox and a bearing mounted in the frame of the press.
  • the phase-shifting gearbox comprises epicyclic gearing having an annulus with a wormwheel on its periphery and a worm meshing with the wormwheel, the worm being on an additional drive shaft of said gearbox.
  • the epicyclic gearing effects a reduction in speed and the bevel gearbox effects an increase in speed of the same order.
  • a first position encoder is driven directly by the line-shaft and a second position encoder is driven directly by the friction cylinder.
  • the second encoder may be driven from the friction cylinder by way of the output shaft of the bevel gearbox.
  • the phase-shifting gearbox is preferably additionally driven by an electric servo-motor so controlled by the first and second encoders as to modify the speed of the rotation imparted to the friction cylinder by the line-shaft.
  • the electric servo-motor is controlled by output signals from a combined phase-synchronising and ratio-modulating controller which receives ratio-modulating input signals from the first and second encoders.
  • the combined phase-synchronising and ratio-modulating controller also receives phase-synchronising input signals sensed from marks printed on the web and from a reference point on a gear driven directly by the line-shaft.
  • a paper press of the so-called Morgan type is provided with an infeed mechanism according to any one of the preceeding ten paragraphs.
  • a known paper press of the so-called Morgan type is built up from a series of units comprising an unwind unit 10, a web guide unit 12, an infeed unit 14, an infeed tower base unit 16, a basic tower base unit 18, a tower-plus-motor-drive base unit 20, a process unit 22, a folder/tension unit 24, and a rewind unit 26.
  • a control console 27 is mounted on the units 24 and 26.
  • Each of the tower base units 16, 18 and 20 carries an identical offset litho print tower 28, and more than one basic tower base unit 18 can be provided depending on the number of different colours to be printed in one pass.
  • each print tower 28 includes an ink duct 30 from which ink is transferred through a series of cylinders indicated generally at 32 to a plate cylinder 34 which takes up the ink selectively over its surface and transfers it to a blanket cylinder 36 which transfers it in turn to the web 38 of paper as it passes between the blanket cylinder 36 and an impression cylinder 40.
  • the plate cylinder 34 and the blanket cylinder 36 are mounted in knowm manner in a quick-change cartridge (not shown).
  • the web 38 is drawn from a roll 42 through a festoon arrangement of cylinders indicated generally at 44 which includes dancing rolls 46 moveable vertically by changes in tension in the web. This movement pneumatically controls a brake (not shown) for the roll 42 so as to keep the unwinding tension constant.
  • the web guide unit 12 includes an electronic eye (not shown) which senses one edge of the web 38 as it passes over a table 48 and in known manner controls the correction of any misalignment.
  • the infeed unit 14 includes an infeed friction cylinder 50 around which the web 38 passes without slipping, thereby drawing the web from the roll 42, to which end said cylinder is sprayed with metal and then lightly ground so that its periphery remains rough although its diameter is extremely accurate.
  • the friction cylinder 50 forms part of an improved infeed mechanism hereinafter described which constitutes the present invention.
  • a web turnover mechanism 52 mounted in the infeed tower base unit 16 can turn the web 38 over in known manner if so desired after the first printing operation.
  • the tower-plus-motor-drive base unit 20 houses drive means (not shown) for a sectional line-shaft 54 (see Figures 1 and 3), said means comprising an electric motor, pulleys and a toothed belt.
  • the line-shaft 54 conventionally supplies synchronised drive to all of the units 16, 18, 20, 22 and 24.
  • the friction cylinder 50 operates in accordance with known general principles whereby the ratio of its rotational speed relative to that of the line-shaft 54 is modulated to control lengthwise stretching of the web 38, and its angular position relative to that of the line-shaft 54 is adjusted to control the phase of the web 38 when it is re-inserted for a second or subsequent passes through the press in order to position the new print relative to the existing print.
  • the line-shaft 54 supplies drive to the infeed unit 14 as will be hereinafter described.
  • the process unit 22 includes a sprocket hole punching mechanism 56 and two perforating cylinders 58 and 59 running against respective anvil cylinders 60 and 61.
  • the cylinder 61 acts as a metering cylinder for pulling the web 38 through the press in a controlled manner, to which end it runs against rubber nip rollers.
  • the folder/tension unit 24 includes a web tension control cylinder 62 after which there is disposed an optional folding station (not shown).
  • the rewind unit 26 comprises a roll 64 driven by an independent electric motor (not shown) which, if rolling rather than folding is required, draws the web 38 from the tension control cylinder 62 around a dancing roll 66 moveable vertically by changes in tension in the web. This movement regulates the speed of the motor which drives the roll 64.
  • a brake (not shown) which is controlled manually by way of a potentiometer acts on a cylinder 68 so as to regulate the rewinding tension.
  • an improved web infeed mechanism comprises, in addition to the friction cylinder 50, an extension 70 of the line-shaft 54 which drives the friction cylinder directly by way of a phase-shifting gearbox 72 which is close-coupled in series with a bevel gearbox 74.
  • the output shaft 76 of the bevel gearbox 74 projects from both sides thereof, and the friction cylinder 50 is supported between one end of the shaft 76 and a bearing 78 mounted in one of the side frames 80 of the press.
  • the phase-shifting gearbox 72 comprises epicyclic gearing consisting of a sun wheel 82 driven by the line-shaft extension 70, a plurality of planet pinions 84, say six as shown, which mesh with the sun wheel 82 and are rotateably mounted on a planet carrier 86 which drives the input shaft 88 of the bevel gearbox 74, and an internally-toothed annulus 90 which meshes with the planet pinions 84.
  • a wormwheel 92 is formed on the periphery of the annulus 90, and a worm 94 which meshes with the wormwheel is formed on an additional or subsidiary drive shaft 96 of the phase-shifting gearbox 72.
  • the epicyclic gearing of the gearbox 72 effects a reduction in speed of 3 to 1 to avoid over-speeding of the planet pinions 84, and the bevel gearbox effects an increase in speed of 1 to 3 to restore the status quo.
  • a first position encoder 98 is driven directly by the line-shaft extension 70, and a second position encoder 100 is effectively driven directly by the friction cylinder 50 by way of the other end of the output shaft 76 of the bevel gearbox 74.
  • the additional drive shaft 96 of the phase-shifting gearbox 72 is driven by an electric servo-motor 102 which is controlled by output signals from a combined phase-synchronising and ratio-modulating controller (not shown) which receives ratio-modulating input signals from the first and second encoders 98 and 100 whereby the speed of the rotation imparted to the friction cylinder 50 by the line-shaft extension 70 is continuously modified or trimmed.
  • the combined phase-synchronising and ratio-modulating controller also receives phase-synchronising input signals sensed in known manner from equally-spaced marks printed on one margin of the web 38 and from a reference point on a gear (not shown) driven directly by the line-shaft 54, whereby the web is positioned to align new and existing printing. Said gear is crowded into mesh with a mating gear (not shown) on the line-shaft 54 to eliminate back-lash.
  • the improved infeed mechanism is able to control ratio-modulating and phase-synchronising to within about 0.1 millimetres. This degree of accuracy is aided by the direct drives between the line-shaft 54 and the first encoder 98, and between the friction cylinder 50 and the second encoder 100, as well as between the line-shaft and the gear bearing the reference point, which eliminate transmission errors from the associated measurements.
  • a press according to the invention has no print towers and base units therefor, but is simply designed for the dedicated processing of a continuous web of paper by, for example, repeatedly sprocket hole punching, perforating, and rolling, folding or cutting it. In a complementary modification, a press is simply designed to print without performing any such processing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (11)

  1. Mécanisme d'alimentation d'une presse à papier ou analogue, ledit mécanisme d'alimentation comportant un arbre de ligne (54) destiné à entraíner diverses unités de la presse, et un cylindre de friction d'alimentation (50) entraíné de manière synchronisée avec l'arbre de ligne, le cylindre de friction étant agencé pour être entraíné directement à partir de l'arbre de ligne par l'intermédiaire d'une boíte d'engrenages de changement de phase (72) qui est de plus entraínée par un servomoteur électrique (102) commandé par des signaux de sortie provenant d'un dispositif de commande qui reçoit des signaux d'entrée de modulation de rapport de manière à pouvoir modifier la vitesse de la rotation imprimée au cylindre de friction par l'arbre de ligne pour contrôler l'étirement en longueur de la bande, caractérisé en ce que le dispositif de commande est un dispositif combiné de commande de synchronisation de phase et de modulation de rapport qui reçoit également des signaux d'entrée de synchronisation de phase, de sorte que la position angulaire du cylindre de friction d'alimentation (50) par rapport à celle de l'arbre de ligne (54) peut également être ajustée pour commander la position ou la phase de la bande.
  2. Mécanisme d'alimentation selon la revendication 1, dans lequel le cylindre de friction (50) est entraíné à partir de l'arbre de ligne (54) par l'intermédiaire d'une boíte d'engrenages de changement de phase (72) en série avec une boíte d'engrenages coniques (74).
  3. Mécanisme d'alimentation selon la revendication 2, dans lequel le cylindre de friction (50) est supporté entre l'arbre de sortie (76) de la boíte d'engrenage conique (74) et un palier (78) monté sur le châssis (80) de la presse.
  4. Mécanisme d'alimentation selon la revendication 2 ou 3, dans lequel la boíte d'engrenages de changement de phase (72) comporte un engrenage épicycloïdal ayant un espace annulaire (90) ayant une roue à vis (92) sur sa périphérie, et une vis sans fin (94) engrenant avec la roue à vis, la vis étant sur un arbre d'entraínement supplémentaire (96) de ladite boíte d'engrenages.
  5. Mécanisme d'alimentation selon la revendication 4, dans lequel l'engrenage épicycloïdal effectue une réduction de vitesse, et la boíte d'engrenages coniques (74) effectue une augmentation de vitesse du même ordre.
  6. Mécanisme d'alimentation selon l'une quelconque des revendications 2 à 5, dans lequel un premier codeur de position (98) est entraíné directement par l'arbre de ligne (54) et un second codeur de position (100) est entraíné directement par le cylindre de friction (50).
  7. Mécanisme d'alimentation selon la revendication 6, dans lequel le second codeur (100) est entraíné à partir du cylindre de friction (50) par l'intermédiaire de l'arbre de sortie (76) de la boíte d'engrenages coniques (74).
  8. Mécanisme d'alimentation selon la revendication 6 ou 7, dans lequel le servomoteur électrique (102) est commandé par les premier et second codeurs (98 et 100).
  9. Mécanisme d'alimentation selon la revendication 8, dans lequel le dispositif combiné de commande de synchronisation de phase et de modulation de rapport reçoit des signaux d'entrée de modulation de rapport provenant des premier et second codeurs (98 et 100).
  10. Mécanisme d'alimentation selon la revendication 9, dans lequel le dispositif combiné de commande de synchronisation de phase et de modulation de rapport reçoit également des signaux d'entrée de synchronisation de phase détectés à partir de repères imprimés sur la bande (38) et à partir d'un point de référence situé sur un engrenage entraíné directement par l'arbre de ligne (54).
  11. Presse à papier que l'on appelle du type Morgan, munie d'un mécanisme d'alimentation selon l'une quelconque des revendications précédentes.
EP96303001A 1995-05-01 1996-04-29 Mécanisme d'alimentation pour une machine à imprimer le papier ou similaire Expired - Lifetime EP0741014B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9509138.5A GB9509138D0 (en) 1995-05-01 1995-05-01 Crabtree Morgan continuous forms paper press-infeed development
GB9509138 1995-05-01

Publications (3)

Publication Number Publication Date
EP0741014A2 EP0741014A2 (fr) 1996-11-06
EP0741014A3 EP0741014A3 (fr) 1997-08-13
EP0741014B1 true EP0741014B1 (fr) 2001-10-31

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Application Number Title Priority Date Filing Date
EP96303001A Expired - Lifetime EP0741014B1 (fr) 1995-05-01 1996-04-29 Mécanisme d'alimentation pour une machine à imprimer le papier ou similaire

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EP (1) EP0741014B1 (fr)
DE (1) DE69616411T2 (fr)
GB (1) GB9509138D0 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106042610A (zh) * 2016-06-29 2016-10-26 广东顺德德力印刷机械有限公司 预套准凹版印刷机

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4896808A (en) * 1987-09-17 1990-01-30 Koening & Bauer Aktiengesellschaft Device for the controlled infeed of a web to a printing machine, method for regulating a corresponding control signal, and device for performing the method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1297289A (fr) * 1961-05-19 1962-06-29 Etudes De Machines Speciales Dispositif de pré-réglage automatique de différents éléments d'une machine à imprimer
US3677177A (en) * 1970-07-28 1972-07-18 Smith R P M Corp Drive for controlling web length in rotary printing presses
GB2150121B (en) * 1983-11-21 1987-06-24 Taiyo Tekko Kk Producing continuous business form stationery

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4896808A (en) * 1987-09-17 1990-01-30 Koening & Bauer Aktiengesellschaft Device for the controlled infeed of a web to a printing machine, method for regulating a corresponding control signal, and device for performing the method

Also Published As

Publication number Publication date
DE69616411T2 (de) 2002-07-11
EP0741014A2 (fr) 1996-11-06
GB9509138D0 (en) 1995-06-28
DE69616411D1 (de) 2001-12-06
EP0741014A3 (fr) 1997-08-13

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