GB1586926A - Rotary printing machine with register-maintained sheet transfer between printing units - Google Patents

Rotary printing machine with register-maintained sheet transfer between printing units Download PDF

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Publication number
GB1586926A
GB1586926A GB6072/78A GB607278A GB1586926A GB 1586926 A GB1586926 A GB 1586926A GB 6072/78 A GB6072/78 A GB 6072/78A GB 607278 A GB607278 A GB 607278A GB 1586926 A GB1586926 A GB 1586926A
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GB
United Kingdom
Prior art keywords
gear
drive
unit
printing
gear unit
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
Application number
GB6072/78A
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 AG
Original Assignee
MAN Maschinenfabrik Augsburg Nuernberg AG
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 Maschinenfabrik Augsburg Nuernberg AG filed Critical MAN Maschinenfabrik Augsburg Nuernberg AG
Publication of GB1586926A publication Critical patent/GB1586926A/en
Expired legal-status Critical Current

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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
    • B41F13/008—Mechanical features of drives, e.g. gears, clutches
    • B41F13/012—Taking-up backlash

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Gear Transmission (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

The device for in-register sheet transfer between the printing units of a multicolour sheet-fed rotary printing machine in series construction comprises a train of gears (1, 9, 11, 13, 3) which connects a transfer drum to the printing unit cylinders and, if appropriate, to further transfer drums. To eliminate the backlash by spring force, the drive of the printing units is determined statically from a point on the printing machine via a drive gear mechanism (15). Arranged at the end of the train of gears (1, 9, 11, 13, 3) is a braking gear mechanism (17) which is prestressed by a stationary and adjustable spring (45). The drive gear mechanism (15) is arranged on the first printing unit (1) and the braking gear mechanism (17) is arranged on the last printing unit (3). The braking and drive gear mechanisms (17, 15) are driven via worms (23, 21) by the main drive shaft (19). <IMAGE>

Description

(54) ROTARY PRINTING MACHINE WITH REGISTER-MAINTAINED SHEET TRANSFER BETWEEN PRINTING UNITS (71) We, MASCHINENFABRIK AU GSBURG-NURNBERG AKTIENGESELLSCHAFT, a German company, of 8900 Augsburg, Sttadtbachstrasse 1, Germany, (Fed. Rep.), do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to a rotary printing machine, particularly although not exlusively a multi-colour, sheet rotary printing machine, including at least two printing units arranged in series and - at least one intermediate delivery cylinder which is drivingly connected to the printing unit cylinders and to other delivery cylinders (if present), by a gear train, in which the back lash occurring in the gear train can be taken up so that sheets can be transferred between the printing units with the register of the sheets maintained exactly.
It is important to avoid the effects of back lash, which occurs even with careful construction of the gear train, because back lash leads to flank variation on the gear teeth and thus to circumferential oscillations of the gears which can produce quite considerable ink printing variations (double image, blurring) on the print carrier.
An object of the invention is to provide a rotary printing machine with a mechanism for the register-maintained sheet transfer of the kind mentioned at the outset. which, while retaining the advantages of known mechanisms, is more simply constructed and is applicable also to convertible first form and perfecting printing machines.
According to the present invention there is provided a rotary printing machine including at least two printing units arranged in series and at least one intermediate delivery cylinder which is drivingly connected to the printing unit cylinders, and to other intermediate delivery cylinders (if present) by a train of gears, in which the drive of the printing units, statically determined, takes place from a single point of the printing machine, via a first drive gear unit, and in which a second drive gear unit is disposed at one end of the train of gears, the second drive gear unit uncluding a gear which is resiliently biassed in rotation in such a way that back-lash occurring in the gear train is taken up.
The provision of the second drive gear unit eliminates double imaging hitherto caused by the drive, in an extremely simple manner. The second drive gear unit can be constructed relatively easily, since it does not have to transmit any driving forces and only has to cater for the taking up of the back lash in the gear train.
According to several preferred embodiments of the invention, the first drive gear unit can be provided on the first printing unit and the second drive gear unit on the last printing unit; or where there are more than two printing units the first drive gear unit may be provided on a middle printing unit and two of the said second drive gear units may be provided, one on the first and the other on the last printing unit; or a second drive gear may be provided on each printing unit; in the last-mentioned case, each second drive gear unit would have to apply only a relatively small force.
Preferably, the or each second drive gear unit includes a gear which is biassed by a spring which acts against a stationary part and the biassing force of which is adjustable.
With regard to the constuction of the gears, the designer has a considerable amount of freedom. It is not necessary for the first and second drive gear units to have the same basic construction as each other.
The gears previously used can continue to be used for the drive. and the second drive gear unit can be of a different construction according to expediency.
However, in a particularly preferred embodiment, the second drive gear unit includes a worm wheel comprising a ring gear with external toothing drivingly engaged by a worm, which may be drivingly connected to the drive of the first drive gear unit, the ring gear having internal toothing in which is engaged an intermediate pinion gear which also mates with a printing unit cylinder gear, the intermediate pinion gear being located on a cross-piece which is pivotably mounted and is biassed by the spring. The first drive gear unit may also include a worm wheel comprising a ring gear with external toothing drivingly engaged by a worm which may be drivingly connected to the drive of the second drive gear unit, the ring gear having internal toothing in which is engaged an intermediate pinion gear which also mates with a printing unit cylinder gear, the intermediate pinion gear being located on a fixed position axis.
The invention may be carried into practice in a number of ways but two specific embodiments will now be described, by way of example only, with reference to the accompanying drawings, in which: Figure I is a schematic representation of a gear train extending between two printing units, illustrating a first embodiment of the invention, and Figure 2 is an end view illustrating a second embodiment of the invention.
Figure 1 shows the principle of the gear arrangement. Two spur gears 1 and 3 mounted respectively on the shafts 5 and 7 of two impression cylinders form, with three intermediate gear wheels 9, 11 and 13 mounted respectively on the shafts of three delivery cylinders, a simple train of gears.
The shaft 5 of the first printing unit is driven by a drive gear unit 15 and the shaft 7 of the second printing unit is braked by a second drive gear unit 17 acting as a brake gear unit.
Both gear units 15 and 17 receive their respective drive via a drive shaft 19, extending longitudinally of the gear train, and hence of the printing machine, and two worms 21 and 23, which cooperate with respective worm wheels 25 and 27. The worm wheels 25 and 27 are each in the form of an externally toothed ring gear, each such ring gear having internal toothing 29, 31, in each of which is engaged a respective intermediate pinion gear of which is engaged a respective intermediate pinion gear 33 and 35, which pinion also mates with a respective drive wheel 37, 39 carried by the respective shaft 5, 7.
The intermediate pinion gears 33 and 35 are located on respective cross-pieces 41 and 43. The cross-piece 41 of the drive gear unit 15 is fixed and the cross-piece 43 of the brake gear unit 17 is pivotable mounted for pivoting about an axis coincident with the rotary axis of the shaft 7. the cross-piece 43 is furthermore prestressed by a spring 45 which is anchored at one end and the effective biassing force of which is adjustable in a manner not shown.
The spring 45, which acts as a tension or compression spring according to its setting, is disposed, and the brake gear unit 17 is adapted, so that a position displacement of the drive wheel 39 takes place, which takes up the whole back lash between the drive gear unit 15 and the brake gear unit 17 in the train of gears 1, 9, 11, 13 and 3.
In Figure 2, another constuction of the brake gear unit is shown. A normal worm wheel 51, i.e. not a ring gear, cooperates with the worm 23 on the longitudinallyextending drive shaft 19, the worm wheel 51 being integrally connected coaxially with a spur gear 53. A printing cylinder gear 55 is located on the shaft 7 of the last printing unit. A pair of coaxially mounted intermediate gears 57, 57' mate respectively with the spur gear 53 and with the cylinder gear 55, the integrally connected intermediate gears 57, 57' being pivotably mounted in a manner not shown and being prestressed by a spring 59 in the necessary direction for the take up of the back lash, the spring 59 being fixed at one end and adjustable as to its stressing force.
There are various possibilities for construction of the brake gear unit; for example, braking drive may be derived from the printing machine drive wheel via a bevel spur gear wheel, and it would also be possible to suspend the intermediate gears 57, 57' so that they can move.
It may be appreciated that, in Figure 1, the drive of the printing units, statically determined, always takes place from a single point of the printing machine. This would not be the case if the second drive gear unit 17 provided a direct drive linkage, as then it would not always be possible to say, at any given moment, from exactly which point a given printing unit was being driven.
WHAT WE CLAIM IS: 1. A rotary printing machine including at least two printing units arranged in series and at least one intermediate delivery cylinder, which is drivingly connected to the printing unit cylinders, and to the other intermediate delivery cylinders (if present), by a train of gears, in which the drive of the printing units, statically determined, takes place from a single point of the printing machine, via a first drive gear unit, and in which a second drive gear unit is disposed at one end of the train of gears, the second drive gear unit including a gear which is resiliently biassed in rotation in such a way
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (14)

  1. **WARNING** start of CLMS field may overlap end of DESC **.
    according to expediency.
    However, in a particularly preferred embodiment, the second drive gear unit includes a worm wheel comprising a ring gear with external toothing drivingly engaged by a worm, which may be drivingly connected to the drive of the first drive gear unit, the ring gear having internal toothing in which is engaged an intermediate pinion gear which also mates with a printing unit cylinder gear, the intermediate pinion gear being located on a cross-piece which is pivotably mounted and is biassed by the spring. The first drive gear unit may also include a worm wheel comprising a ring gear with external toothing drivingly engaged by a worm which may be drivingly connected to the drive of the second drive gear unit, the ring gear having internal toothing in which is engaged an intermediate pinion gear which also mates with a printing unit cylinder gear, the intermediate pinion gear being located on a fixed position axis.
    The invention may be carried into practice in a number of ways but two specific embodiments will now be described, by way of example only, with reference to the accompanying drawings, in which: Figure I is a schematic representation of a gear train extending between two printing units, illustrating a first embodiment of the invention, and Figure 2 is an end view illustrating a second embodiment of the invention.
    Figure 1 shows the principle of the gear arrangement. Two spur gears 1 and 3 mounted respectively on the shafts 5 and 7 of two impression cylinders form, with three intermediate gear wheels 9, 11 and 13 mounted respectively on the shafts of three delivery cylinders, a simple train of gears.
    The shaft 5 of the first printing unit is driven by a drive gear unit 15 and the shaft 7 of the second printing unit is braked by a second drive gear unit 17 acting as a brake gear unit.
    Both gear units 15 and 17 receive their respective drive via a drive shaft 19, extending longitudinally of the gear train, and hence of the printing machine, and two worms 21 and 23, which cooperate with respective worm wheels 25 and 27. The worm wheels 25 and 27 are each in the form of an externally toothed ring gear, each such ring gear having internal toothing 29, 31, in each of which is engaged a respective intermediate pinion gear of which is engaged a respective intermediate pinion gear 33 and 35, which pinion also mates with a respective drive wheel 37, 39 carried by the respective shaft 5, 7.
    The intermediate pinion gears 33 and 35 are located on respective cross-pieces 41 and 43. The cross-piece 41 of the drive gear unit
    15 is fixed and the cross-piece 43 of the brake gear unit 17 is pivotable mounted for pivoting about an axis coincident with the rotary axis of the shaft 7. the cross-piece 43 is furthermore prestressed by a spring 45 which is anchored at one end and the effective biassing force of which is adjustable in a manner not shown.
    The spring 45, which acts as a tension or compression spring according to its setting, is disposed, and the brake gear unit 17 is adapted, so that a position displacement of the drive wheel 39 takes place, which takes up the whole back lash between the drive gear unit 15 and the brake gear unit 17 in the train of gears 1, 9, 11, 13 and 3.
    In Figure 2, another constuction of the brake gear unit is shown. A normal worm wheel 51, i.e. not a ring gear, cooperates with the worm 23 on the longitudinallyextending drive shaft 19, the worm wheel 51 being integrally connected coaxially with a spur gear 53. A printing cylinder gear 55 is located on the shaft 7 of the last printing unit. A pair of coaxially mounted intermediate gears 57, 57' mate respectively with the spur gear 53 and with the cylinder gear 55, the integrally connected intermediate gears 57, 57' being pivotably mounted in a manner not shown and being prestressed by a spring 59 in the necessary direction for the take up of the back lash, the spring 59 being fixed at one end and adjustable as to its stressing force.
    There are various possibilities for construction of the brake gear unit; for example, braking drive may be derived from the printing machine drive wheel via a bevel spur gear wheel, and it would also be possible to suspend the intermediate gears 57, 57' so that they can move.
    It may be appreciated that, in Figure 1, the drive of the printing units, statically determined, always takes place from a single point of the printing machine. This would not be the case if the second drive gear unit 17 provided a direct drive linkage, as then it would not always be possible to say, at any given moment, from exactly which point a given printing unit was being driven.
    WHAT WE CLAIM IS: 1. A rotary printing machine including at least two printing units arranged in series and at least one intermediate delivery cylinder, which is drivingly connected to the printing unit cylinders, and to the other intermediate delivery cylinders (if present), by a train of gears, in which the drive of the printing units, statically determined, takes place from a single point of the printing machine, via a first drive gear unit, and in which a second drive gear unit is disposed at one end of the train of gears, the second drive gear unit including a gear which is resiliently biassed in rotation in such a way
    that back-lash occurring in the gear train is taken up.
  2. 2. A printing machine as claimed in claim 1, in which the first drive gear unit is connected to drive the first printing unit and the second drive gear unit is drivingly connected to the last printing unit.
  3. 3. A printing machine as claimed in claim 1, in which there are more than two printing units arranged in series, and in which the first drive gear unit is on an intermediate printing unit, there being provided two of the said second drive gear units, one drivingly connected to the first printing unit and the other drivingly connected to the last printing unit.
  4. 4. A printing machine as claimed in claim 1, in which there are more than two printing units arranged in series and respective second drive gear unit is provided on each printing unit other than that to which the first drive gear unit is connected.
  5. 5. A printing machine as claimed in any one of the preceding claims, in which the or each second drive second drive gear unit includes a gear biassed by a spring which acts against a stationary part and the biassing force of which is adjustable.
  6. 6. A printing machine as claimed in claim 5, in which the or each second drive gear unit includes a worm wheel comprising a ring gear the external teeth of which are engaged by a worm connected to a drive, the ring gear having internal toothing in which an intermediate pinion gear engages, the intermediate pinion gear also mating with a printing unit cylinder gear and being located on a cross-piece which is pivotably mounted and biassed by the spring.
  7. 7. A printing machine as claimed in claim 6, in which the worm engaging the worm wheel of the or each second drive gear unit is drivingly connected to the drive of the drive gear unit
  8. 8. A printing machine as claimed in any one of claims 1 to 7, in which the first drive gear unit includes a worm wheel drivingly engaged by a worm connected to a drive, the worm wheel being connected at least indirectly to a printing unit cylinder.
  9. 9. A printing machine as claimed in claim 8, in which the first drive gear unit includes a worm wheel comprising a ring gear the external teeth of which are engaged by a worm connected to a drive, the ring gear having internal toothing in which an intermediate pinion gear engages, the intermediate pinion gear also mating with a printing unit cylinder gear and being located on a fixed position axis.
  10. 10. A printing machine as claimed in claim 9, in which the worm engaging the worm wheel of the first drive gear unit is drivingly connected to the or each second drive unit.
  11. 11. A printing machine as claimed in claim 5, in which the or each second drive gear unit includes a worm wheel drivingly connected to a worm connected to a drive, the worm wheel being connected to a spur gear, there being provided an intermediate gear wheel which is pivotably mounted and stressed by the spring and which mates the spur gear and with a printing unit cylinder gear.
  12. 12. A printing machine as claimed in claim 11, in which the worm engaging the worm wheel of the or each second drive gear unit is drivingly connected to the drive of the first drive gear unit.
  13. 13. A printing machine as claimed in claim 5, in which the or each second drive gear unit comprises a bevel spur gear connected to be driven with the first drive gear unit, and in which an intermediate gear, pivotably mounted and stressed by the spring, mates with the bevel spur gear wheel and with a printing unit cylinder gear.
  14. 14. A printing machine having at least two printing units arranged in series and at least one intermediate delivery cylinder, there being provided, for maintaining the register of sheets transferred from one printing unit to another, a gear mechanism substantially as specifically described herein with reference to Figure 1 or to Figure 2 of the accompanying drawings.
GB6072/78A 1977-02-18 1978-02-15 Rotary printing machine with register-maintained sheet transfer between printing units Expired GB1586926A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2707035A DE2707035C2 (en) 1977-02-18 1977-02-18 Device for transferring sheets in register between printing units

Publications (1)

Publication Number Publication Date
GB1586926A true GB1586926A (en) 1981-03-25

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ID=6001593

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6072/78A Expired GB1586926A (en) 1977-02-18 1978-02-15 Rotary printing machine with register-maintained sheet transfer between printing units

Country Status (5)

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CH (1) CH626567A5 (en)
DD (1) DD135367A1 (en)
DE (1) DE2707035C2 (en)
GB (1) GB1586926A (en)
IT (1) IT1102254B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5355742A (en) * 1992-07-09 1994-10-18 Heidelberger Druckmaschinen Ag Device for avoiding flank blacklash in gear trains

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD140224A1 (en) * 1979-01-04 1980-02-20 Wilhelm Wege DRIVE FOR MULTICOLOUR ROTATION PRINTING MACHINES
DD159862A1 (en) * 1981-06-24 1983-04-13 Herbert Doliner DRIVE IN BOW ROTARY PRINTING MACHINES
DD286330B5 (en) * 1989-08-07 1998-04-16 Kba Planeta Ag Device for register correction
DE4141262C2 (en) * 1991-12-14 1996-12-05 Kba Planeta Ag Drive on printing machines

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1430274A (en) * 1917-11-26 1922-09-26 Harley C Alger Lost-motion take-up for printing presses or the like
DE1237140B (en) * 1962-10-19 1967-03-23 Planeta Veb Druckmasch Werke Drive for multi-color sheet-fed rotary printing machines in a row
DE2014753C3 (en) * 1970-03-26 1974-01-10 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Drive of a rotary printing press
DE2340263C3 (en) * 1973-08-09 1980-04-24 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Drive for multi-color sheet-fed rotary printing machines in a row arrangement with at least two printing units
DE2354541C3 (en) * 1973-10-31 1982-01-21 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Drive for multi-color sheet-fed rotary printing presses in a row with at least two printing units

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5355742A (en) * 1992-07-09 1994-10-18 Heidelberger Druckmaschinen Ag Device for avoiding flank blacklash in gear trains

Also Published As

Publication number Publication date
IT7847973A0 (en) 1978-02-08
DE2707035C2 (en) 1986-03-20
DD135367A1 (en) 1979-05-02
CH626567A5 (en) 1981-11-30
DE2707035A1 (en) 1978-08-24
IT1102254B (en) 1985-10-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee