GB2193926A - Inking system in a printing machine - Google Patents
Inking system in a printing machine Download PDFInfo
- Publication number
- GB2193926A GB2193926A GB08618149A GB8618149A GB2193926A GB 2193926 A GB2193926 A GB 2193926A GB 08618149 A GB08618149 A GB 08618149A GB 8618149 A GB8618149 A GB 8618149A GB 2193926 A GB2193926 A GB 2193926A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ink
- roller
- printing machine
- fount
- ductor
- 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- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/02—Ducts, containers, supply or metering devices
- B41F31/14—Applications of messenger or other moving transfer rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/02—Ducts, containers, supply or metering devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/02—Ducts, containers, supply or metering devices
- B41F31/10—Applications of feed or duct rollers
- B41F31/12—Applications of feed or duct rollers adjustable for regulating supply
Landscapes
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
A printing machine comprising an ink reservoir (60), an ink fount roller (24) which is mounted for rotation in the reservoir (60), variable speed drive means (64) for driving the ink fount roller (24), and a ductor roller (26) for transferring the ink from the ink fount roller (24) to an ink train of rollers (34, 36, 46), the ductor roller (26) being pivotally mounted such that it can be held for predetermined periods of time either in contact with the ink fount roller (24) or away from the ink fount roller (24), and the printing machine being such that the amount of ink transferred by the ductor roller (26) to the ink train of rollers (34,36,46) can precisely be controlled by varying the speed of rotation of the ink fount roller (24) by the variable speed drive means (64), and by varying the time of contact of the ductor roller (26) with the ink fount roller (24). <IMAGE>
Description
SPECIFICATION
A printing machine
This invention relates to a printing machine.
During printing on printing machines, varying amounts of ink may be required. The precise control of the amount of ink available for printing is of considerable importance in obtaining good quality reproduction.
It is an aim of the present invention to provide a printing machine in which the amount of ink available for printing is able to be precisely controlled.
Accordingly, this invention provides a printing machine comprising an ink reservoir for ink, an ink fount roller which is mounted for rotation in the ink reservoir, variable speed drive means for driving the ink fount roller, and a ductor roller for transferring ink from the ink fount roller to an ink train of rollers, the ductor roller being pivotally mounted such that it can be held for predetermined periods of time either in contact with the ink fount roller or away from the ink fount roller, and the printing machine being such that the amount of ink transferred by the ductor roller to the ink train of rollers can precisely be controlled by varying the speed of rotation of the ink fount roller by the variable speed drive means, and by varying the time of contact of the ductor roller with the ink fount roller.
It will be appreciated that the amount of ink picked up by the ink fount roller from the reservoir increases with increasing speeds of rotation of the ink fount roller. The ductor roller obviously takes more ink away from the ink fount roller with increasing periods of contact of the ductor roller with the ink fount roller.
The variable speed drive means may comprise a variable speed motor and a gear box.
The printing machine may include electronic control means for controlling the variable speed drive means. The electronic control means may include sensor means for sensing printing perameters such for example as the speed of operation of the printing machine.
The printing machine of the present invention may allow programmable ink feeding. If the variable speed drive means is proportionally controlled, the printing machine may also allow the ink feeding to be proportional to the speed of operation of the printing machine So that the ink can be precisely controlled depending upon the hourly throughput of the printing machine, that is the number of sheets printed per hour.
The printing machine may include means for locking the ductor roller in its operative condition against the ink fount roller and/or in its inoperative position away from the ink fount roller.
Usually, the ductor roller will only be locked in its operative position.
The facility of locking the ductor roller where desired is advantageous for an operator initially setting up the printing machine for a printing run. The operator is then able to visually see and adjust the ink layer obtained on the ductor roller before releasing the means for locking the ductor roller and commencing the printing run. Usually, the means for locking the ductor roller will be an electronically operated locking means.
The- printing machine of the present invention may enable an operator to electronically fine tune various printing perameters which are critical to obtaining good print reproductions.
The ductor roller may be pivotally movable to its operative position in contact with the ink fount roller by means of a solenoid.
The ink fount roller may be biased to its inoperative position away from the ink fount roller by means of a spring.
Advantageously, a pair of solenoids are employed operating in a push/pull mode such that one solenoid pulls the ductor roller into operative contact with the ink fount roller, and the other solenoid pulls the ductor roller to its inoperative position away from the ink fount roller.
An embodiment of the invention will now be described solely by way of example and with reference to the accompanying drawings in which:
Figure 1 shows a printing head of a printing machine; and
Figure 2 shows in detail the part of the printing machine which forms the subject of the present invention.
Referring to Figure 1, there is shown a printing machine 2 comprising a plate roller 4, a reservoir 6 for water 8, and a fount roller 10 for transferring water 8 from the reservoir 6 to the plate roller 4.
The reservoir 6 and the fount roller 10 form part of a water unit 12 which also comprises a ductor roller 14, a nitrile roller 16, an oscillating roller 18 and a Molleton roller 20. The direction of rotation of the various rollers in the water unit 12 is shown by arrows in the water unit 12.
The plate roller 4 receives ink from an- ink unit 22. The ink unit 22 comprises an ink fount roller 24, a ductor roller 26, a rubber roller 28, idler rollers 30,32, ink forme rollers 34,36, a main oscillating roller 38, a rubber roller 40, and a diStribution roller 42. The direction of rotation of the various rollers in the ink unit 22 is shown by arrows. The passage of ink from the ink fount roller 24 to the ink forme rollers 34,36 is shown by two long arrows 44,46. In the ink unit 22, the roller 46 acts as an auxiliary oscillating roller.
Water placed on the plate roller 4 via the water fount roller 10 and ink which is placed on the plate roller 4 via the ink fount roller 24 are transferred to the blanket roller 48. Paper 50 passes in the direction of the arrow 52 through the nip 54 between the blanket roller 48 and an impression roller 56. The impression- roller 56 operates in conjunction with a transfer roller 58. An image on the plate roller 4 is thus transferred to the paper 50.
As is well known in the art, the rollers 4,48 and 56 are sometimes referred to as cylinders.
Referring now to Figure 2, the ink unit 22 is shown in more detail. In particular, Figure 2 shows the ink fount roller 24, the ductor roller 26 and the three rollers 34,36,46, which form part of an ink train of rollers as can be seen more clearly from Figure 1.
The ink fount roller 24 rotates in an ink reservoir 60 for ink 62.
The ink fount roller 24 is mounted for rotation in the ink reservoir 60 by a variable speed drive means 64. The variable speed drive means 64 drives the ink fount roller 24.
As can be seen from Figure 2, the ductor roller 26 is for transferring ink 62 from the ink fount roller 24 to the roller train which includes the rollers 34,36,46. The ductor roller 26 is pivotally mounted such that it can be held for predetermined periods of time either in contact with the ink fount roller 24 or away from the ink fount roller 24.
The printing machine 2 is such that the amount of ink transferred by the ductor roller 26 to the ink train of rollers can precisely be controlled by varying the speed of rotation of the ink fount roller 24 by the variable speed drive means 64, and by varying the time of contact of the ductor roller 26 with the ink fount roller 24.
The variable speed drive means 64 comprises a variable speed motor and a gear box.
The printing machine 2 can be operated such that programmable ink feeding can be achieved and, by proportionally controlling the speed of operation of the variable speed drive means 64, the ink provided can be speed proportional to the speed of operation of the printing machine 2.
It will be seen that the ductor roller 26 is mounted on an arm 66 which pivots about a pivot 68. A dwell solenoid 70 is provided for pivoting the arm 66 about the pivot 68 Such that the ductor roller 26 iS in contact with the ink fount roller 24 or is away from the ink fount roller 24 for periods of time determined by the period of time of operation of the dwell solenoid 70. The dwell solenoid 70 receives appropriate control data from sensor means 72 which sense, for example, the speed of operation of the printing machine 2 by sensing the number of sheets per hour that are being printed. Appropriate information is fed along line 74 to logic circuits 76,78 and this information is used to control the dwell time of the Hwell solenoid 70. It will be noted that the logic circuits 76, 78 are able to be finally tuned by operator fine tune controls 80,82 respectively.The operator fine tune controls 80,82 are normally effective to control potentiometers forming part of the logic circuits 76,78.
It is to be appreciated that the embodiment of the invention described above with reference to the accompanying drawings has been given by way of example only snd that modifications may be effected. Thus, for example, the ductor roller 26 will usually be biased to its inoperative position sway from the ink fount roller 24 by means of a spring (not shown). For more positive action of the ductor roller 26, another solenoid like solenoid 70 may be employed for pulling the ductor roller 26 away from the ink fount roller 24 when it is desired to move the ductor roller 26 to its inoperative position away from the ink fount roller 24. Also, mechanical nips (not shown) may be provided where appropriate for giving good mechanical mixing of, for example, ink and/or water. Generally, the printing machine 2 may be constructed to any desired degree of sophistication so that the printing machine 2 may be a large and complicated colour printing machine or it may be a simple duplicator type of machine printing either black end white or various colours, for example four colours as may be required.
Claims (8)
1. A printing machine comprising an ink reservoir for ink, an ink fount roller which is mounted for rotation in the ink reservoir, variable speed drive means for driving the ink fount roller, and a ductor roller for transferring ink from the ink fount roller to an ink train of rollers, the ductor roller being pivotally mounted such that it can be held for predetermined periods of time either in contact with the ink fount roller or away from the ink fount roller, and the printing machine being such that the amount of ink transferred by the ductor roller to the ink train of rollers can precisely be controlled by varying the speed of rotation of the ink fount roller by the variable speed drive means, and by varying the time of contact of the ductor roller with the ink fount roller.
2. A printing machine according to claim 1 in which the variable speed drive means comprises a variable speed motor and a drive gear box.
3. A printing machine according to claim 1 or claim 2 and including electronic control means for controlling the variable speed drive means.
4. A printing machine according to any one of the preceding claims in which the variable speed drive means is proportionally controlled, and in which the printing machine is such that the ink feeding is proportional to the speed of operation of the printing machine so that the ink can be precisely controlled depending upon the hourly throughput of the printing machine.
5. A printing machine according to any one of the preceding claims and including means for locking the ductor roller in its operative condition against the ink fount roller and/or in its inoperative position away from the ink fount roller.
6. A printing machine according to any one of the preceding claims in which the ductor roller is pivotally movable to its operative position in contact with the ink fount roller by means of a solenoid.
7. A printing machine according to claim 6 in which a pair of solenoids are employed operating in a push/pull mode such that one solenoid pulls the ductor roller into operative contact with the ink fount roller, and the other solenoid pulls the ductor roller to its inoperative position away from the ink fount roller.
8. A printing machine substantially as herein described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08618149A GB2193926A (en) | 1986-07-24 | 1986-07-24 | Inking system in a printing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08618149A GB2193926A (en) | 1986-07-24 | 1986-07-24 | Inking system in a printing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8618149D0 GB8618149D0 (en) | 1986-09-03 |
| GB2193926A true GB2193926A (en) | 1988-02-24 |
Family
ID=10601656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08618149A Withdrawn GB2193926A (en) | 1986-07-24 | 1986-07-24 | Inking system in a printing machine |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2193926A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2638394A1 (en) * | 1988-10-31 | 1990-05-04 | Polygraph Leipzig | TAKE-IN ROLLER INKING DEVICE FOR ROTARY ROLL PRINTING MACHINES, ROTATING AT HIGH SPEED |
| FR2658755A1 (en) * | 1990-02-28 | 1991-08-30 | Wpc Machinery Corp | INK APPLICATION SYSTEM FOR PRINTING APPARATUS. |
| EP0467124A1 (en) * | 1990-07-16 | 1992-01-22 | Heidelberger Druckmaschinen Aktiengesellschaft | Rapidly oscillating ductor roller |
| EP0518234A1 (en) * | 1991-06-13 | 1992-12-16 | MAN Roland Druckmaschinen AG | Electronically controlled device and method for driving the ink fountain rollers |
| EP0623468A1 (en) * | 1993-05-03 | 1994-11-09 | MAN Roland Druckmaschinen AG | Ductor inking device and method for controlling ink supply in printing presses |
| DE4314426A1 (en) * | 1993-05-03 | 1994-11-10 | Roland Man Druckmasch | Method for setting the ink quantity in vibrator inking units of printing machines, in particular sheet-fed offset printing machines, and an appropriately designed vibrator inking unit |
| EP0670216A1 (en) * | 1994-03-02 | 1995-09-06 | MAN Roland Druckmaschinen AG | Method for controlling the inking in the production of printed products |
| EP0696503A2 (en) | 1994-08-11 | 1996-02-14 | MAN Roland Druckmaschinen AG | Method and ductor drive for feeding ink in the ductor inking device of a printing press |
| EP0710557A1 (en) * | 1994-10-10 | 1996-05-08 | Heidelberger Druckmaschinen Aktiengesellschaft | Device and method for controlled transfer of ink |
| EP0799697A2 (en) * | 1996-04-03 | 1997-10-08 | Heidelberger Druckmaschinen Aktiengesellschaft | Process for controlling the ductor roller in printing presses |
| GB2331960A (en) * | 1997-12-05 | 1999-06-09 | Roland Man Druckmasch | Ductor inking units in printing presses and control thereof |
| DE19815293A1 (en) * | 1998-04-06 | 1999-10-07 | Heidelberger Druckmasch Ag | Printing press and method for operating a printing press |
| EP0951996A2 (en) * | 1998-04-22 | 1999-10-27 | MAN Roland Druckmaschinen AG | Control of a ductor roller in a printing machine |
| EP0962317A1 (en) * | 1998-06-04 | 1999-12-08 | MAN Roland Druckmaschinen AG | Control for a ductor-type inking system |
| US6112660A (en) * | 1994-10-10 | 2000-09-05 | Heidelberger Druckmaschinen Aktiengesellschaft | Method and device for the controlled transfer of printing ink |
| US6481352B2 (en) * | 1999-12-06 | 2002-11-19 | Heidelberger Druckmaschinen Ag | Method for controlling a quantity of ink in an inking unit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB985810A (en) * | 1961-03-29 | 1965-03-10 | Samuel M Langston Co | Ink fountain for a printing machine |
| GB1278371A (en) * | 1969-09-06 | 1972-06-21 | Ricoh Kk | Improvements in and relating to printing machines |
| GB1324470A (en) * | 1970-11-12 | 1973-07-25 | Adamovske Strojirny Np | Driving arrangement for rollers on printing machines |
| GB1347856A (en) * | 1970-10-25 | 1974-02-27 | Adamovske Strojirny Np | Offset printing machines |
| US4050383A (en) * | 1975-06-23 | 1977-09-27 | Adamovske Strojirny, Narodni Podnik | Arrangement for generating a rocking motion of a transfer cylinder of an inking system |
| US4223603A (en) * | 1979-01-10 | 1980-09-23 | Didde-Glaser, Inc. | Planetary inker for offset printing press |
-
1986
- 1986-07-24 GB GB08618149A patent/GB2193926A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB985810A (en) * | 1961-03-29 | 1965-03-10 | Samuel M Langston Co | Ink fountain for a printing machine |
| GB1278371A (en) * | 1969-09-06 | 1972-06-21 | Ricoh Kk | Improvements in and relating to printing machines |
| GB1347856A (en) * | 1970-10-25 | 1974-02-27 | Adamovske Strojirny Np | Offset printing machines |
| GB1324470A (en) * | 1970-11-12 | 1973-07-25 | Adamovske Strojirny Np | Driving arrangement for rollers on printing machines |
| US4050383A (en) * | 1975-06-23 | 1977-09-27 | Adamovske Strojirny, Narodni Podnik | Arrangement for generating a rocking motion of a transfer cylinder of an inking system |
| US4223603A (en) * | 1979-01-10 | 1980-09-23 | Didde-Glaser, Inc. | Planetary inker for offset printing press |
Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2638394A1 (en) * | 1988-10-31 | 1990-05-04 | Polygraph Leipzig | TAKE-IN ROLLER INKING DEVICE FOR ROTARY ROLL PRINTING MACHINES, ROTATING AT HIGH SPEED |
| FR2658755A1 (en) * | 1990-02-28 | 1991-08-30 | Wpc Machinery Corp | INK APPLICATION SYSTEM FOR PRINTING APPARATUS. |
| EP0467124A1 (en) * | 1990-07-16 | 1992-01-22 | Heidelberger Druckmaschinen Aktiengesellschaft | Rapidly oscillating ductor roller |
| EP0518234A1 (en) * | 1991-06-13 | 1992-12-16 | MAN Roland Druckmaschinen AG | Electronically controlled device and method for driving the ink fountain rollers |
| US5493970A (en) * | 1993-05-03 | 1996-02-27 | Man Roland Druckmaschinen Ag | Method and apparatus for regulating ink distribution in an undershot inking unit of a printing machine |
| DE4314426A1 (en) * | 1993-05-03 | 1994-11-10 | Roland Man Druckmasch | Method for setting the ink quantity in vibrator inking units of printing machines, in particular sheet-fed offset printing machines, and an appropriately designed vibrator inking unit |
| US5566613A (en) * | 1993-05-03 | 1996-10-22 | Man Roland Druckmaschinen | Method and apparatus for regulating ink distribution in an undershot inking unit of a printing machine |
| EP0623468A1 (en) * | 1993-05-03 | 1994-11-09 | MAN Roland Druckmaschinen AG | Ductor inking device and method for controlling ink supply in printing presses |
| EP0670216A1 (en) * | 1994-03-02 | 1995-09-06 | MAN Roland Druckmaschinen AG | Method for controlling the inking in the production of printed products |
| DE4406727A1 (en) * | 1994-03-02 | 1995-09-07 | Roland Man Druckmasch | Process for controlling color in the manufacture of printed matter |
| EP0696503A2 (en) | 1994-08-11 | 1996-02-14 | MAN Roland Druckmaschinen AG | Method and ductor drive for feeding ink in the ductor inking device of a printing press |
| US5784960A (en) * | 1994-08-11 | 1998-07-28 | Man Roland Druckmaschinen Ag | Apparatus and method for regulating ink distribution in a printing machine |
| US5685225A (en) * | 1994-08-11 | 1997-11-11 | Man Roland Druckmaschinen Ag | Apparatus and method for regulating ink distribution in a printing machine |
| EP0710557A1 (en) * | 1994-10-10 | 1996-05-08 | Heidelberger Druckmaschinen Aktiengesellschaft | Device and method for controlled transfer of ink |
| US6112660A (en) * | 1994-10-10 | 2000-09-05 | Heidelberger Druckmaschinen Aktiengesellschaft | Method and device for the controlled transfer of printing ink |
| EP0799697A3 (en) * | 1996-04-03 | 1998-03-18 | Heidelberger Druckmaschinen Aktiengesellschaft | Process for controlling the ductor roller in printing presses |
| US5845576A (en) * | 1996-04-03 | 1998-12-08 | Heidelberger Druckmaschinen Aktiengesellschaft | Method of controlling a vibrator roller in a printing press |
| EP0799697A2 (en) * | 1996-04-03 | 1997-10-08 | Heidelberger Druckmaschinen Aktiengesellschaft | Process for controlling the ductor roller in printing presses |
| GB2331960A (en) * | 1997-12-05 | 1999-06-09 | Roland Man Druckmasch | Ductor inking units in printing presses and control thereof |
| GB2331960B (en) * | 1997-12-05 | 1999-07-28 | Roland Man Druckmasch | Ductor inking units in printing presses and control thereof |
| DE19815293A1 (en) * | 1998-04-06 | 1999-10-07 | Heidelberger Druckmasch Ag | Printing press and method for operating a printing press |
| EP0949075A2 (en) * | 1998-04-06 | 1999-10-13 | Heidelberger Druckmaschinen Aktiengesellschaft | Printing machine and method of operating a printing machine |
| EP0949075A3 (en) * | 1998-04-06 | 2000-05-10 | Heidelberger Druckmaschinen Aktiengesellschaft | Printing machine and method of operating a printing machine |
| US6227113B1 (en) | 1998-04-06 | 2001-05-08 | Heidelberger Druckmaschinen Ag | Printing machine and method of operating a printing machine |
| EP0951996A2 (en) * | 1998-04-22 | 1999-10-27 | MAN Roland Druckmaschinen AG | Control of a ductor roller in a printing machine |
| EP0951996A3 (en) * | 1998-04-22 | 2000-05-24 | MAN Roland Druckmaschinen AG | Control of a ductor roller in a printing machine |
| EP0962317A1 (en) * | 1998-06-04 | 1999-12-08 | MAN Roland Druckmaschinen AG | Control for a ductor-type inking system |
| US6481352B2 (en) * | 1999-12-06 | 2002-11-19 | Heidelberger Druckmaschinen Ag | Method for controlling a quantity of ink in an inking unit |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8618149D0 (en) | 1986-09-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |