EP0223405A1 - Register control apparatus - Google Patents
Register control apparatus Download PDFInfo
- Publication number
- EP0223405A1 EP0223405A1 EP86307935A EP86307935A EP0223405A1 EP 0223405 A1 EP0223405 A1 EP 0223405A1 EP 86307935 A EP86307935 A EP 86307935A EP 86307935 A EP86307935 A EP 86307935A EP 0223405 A1 EP0223405 A1 EP 0223405A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- register
- web
- printing
- flow path
- machine
- 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.)
- Ceased
Links
Images
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
- B41F13/025—Registering devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0081—Devices for scanning register marks
Definitions
- This invention relates to the detection of errors in register in operations performed on a web.
- register control is normally effected by printing register marks on the web for each of the colour-component images and using light-sensitive cells to detect the passage and the position of the marks.
- the register marks for the different colour components are printed with longitudinal spacings, which are of known value for correct register, in an image-free strip of the web running along the web edge.
- a code mark may be provided ahead of the register marks or the first register mark may be of a form capable of recognition by a suitable electronic circuit.
- a register control of a slightly different kind is required when a web on which a repeated image has been printed is to be subjected to an operation such as cutting or folding in register with the printed images.
- one of the signals to be compared can be derived by sensing a register mark printed at the same time as the image print but the other signal must represent the position of the cutter or folder in its cycle of operation.
- such a second signal is derived from the cutting or folding machine by a magnetic pick-up device.
- the present invention is particularly concerned with a register control of the kind in which an operation such as folding or cutting is to be performed on the web in register with a printed image.
- the present invention relates to printing apparatus having a web flow path extending from a printing cylinder, for printing repeat images and register marks on the web, to a machine operating in synchronism with the printing cylinder to perform a non-printing operation on the web in register with the printed images, the web flow path having a length such that it includes a number of printed images; according to the invention, a first mark detector is arranged in the flow path immediately after the printing cylinder, a second mark detector is arranged in the flow path immediately before the machine performing the non-printing operation, and a register control unit receives signals from the two detectors and adjusts register control means in accordance with any departure in the relative timing of the signals from a desired relative timing.
- any interval between the two signals indicates incorrect register and causes the generation of a control signal which may, for example, adjust the position of a compensating roller placed in the flow path so that the web passes over it.
- the present invention enables register control to be achieved between the printing operation and a cutting or folding operation without requiring a signal derived from the cutter or folder. It is able to achieve this result because the cutter or folder and the printing cylinder rotate in synchronism and the first detector is located immediately after the printing cylinder, i.e. at a position such that any dimensional change of the web between printing and mark detection is negligible; consequently, the signal derived from the first detector is effectively indicative of the position of the cutting cylinder.
- the signal from the second detector represents the mark position at the end of the web path between the printing cylinder and non-printing machine and, therefore, takes into account the effect of any stretch in the printed web along the flow path. Consequently, a comparison of the relative phases of these marks is indicative of the degree of register between the printed mark on the web close to the folding or cutting machine and the folding or cutting operation carried out by that machine.
- a code mark is printed ahead of the register mark to indicate to the control circuit that register control signals are to be expected from the detectors.
- a web 10 from a supply roll 11 passes between printing cylinders 12a and 12b driven by a motor 13 and then around rollers constituting a register compensation system. These rollers are the fixed rollers 14 and 16 and an intermediate roller 18 which can be adjusted in a direction perpendicular to the plane of the web in the principal direction of the web path.
- the web After leaving the register compensation system, the web passes through a cutting machine having cutting cylinders 20a and 20b, provided with a blade 22 from which emerge the printed cut sheets 10a; the cutting cylinders are also driven by the motor 13.
- a first detector 24 is arranged immediately after the printing cylinders 12a and 12b.
- a second detector 26 is arranged immediately before the cutting cylinders 20a and 20b. Signals from the first and second detectors are applied to a register control circuit 28, the output of which is an error signal which energises a controller 30 to control the position of the intermediate roller 18.
- the printing cylinders and the rollers of the cutting machine are operating in synchronism with one another and with a given phase relationship.
- the compensator In order to maintain correct register the compensator must be adjusted so that the total number of images is equal to a whole numler of images plus a portion of an image corresponding to the difference in phase relation between the printing cylinder and a cutting cylinder.
- the first detector is closely adjacent the exit side of the printing cylinder and consequently, the signal which it generates on seeing a register mark printed by the printing cylinder is representative of the angular position of the printing cylinder and, therefore, of the cutting roller.
- the signal from the second detector on seeing a register mark takes into account any stretching of the web which has occurred as it passes along the flow path and which would otherwise prevent the above-mentioned desired phase relationship from being achieved.
- the error signal from the register control unit indicative of such stretching, adjusts the compensating roller to modify the path length of the flow path and thereby to restore correct register.
- a marginal portion of the web 10 is shown in plan view with code marks 32 and register marks 34.
- the code marks 32 are recognised by the register control circuit and prepare that circuit for receiving the register control signals derived from the marks 34. It is an unusual feature of the invention that the marks from which the signals are derived for comparison are spaced by a large number of complete image lengths along the flow path.
- the invention enables the printer to dispense with the conventional timer linked to the cutting or folding machine.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
Description
- This invention relates to the detection of errors in register in operations performed on a web.
- When a continuous web of paper, foil or film is printed with a succession of similar images and other operations are to be performed on the web in positions controlled by the positions of the first images, it is essential to provide some form of register control.
- One example of apparatus requiring register-control means is a multi-colour printing press. After the printing of the first colour-component image on the web, the subsequent colour-component images printed on the web must be in register with the first image. In such apparatus, register control is normally effected by printing register marks on the web for each of the colour-component images and using light-sensitive cells to detect the passage and the position of the marks. In one method, the register marks for the different colour components are printed with longitudinal spacings, which are of known value for correct register, in an image-free strip of the web running along the web edge. To avoid confusion with other marks in this strip, a code mark may be provided ahead of the register marks or the first register mark may be of a form capable of recognition by a suitable electronic circuit. In an alternative arrangement, no image-free strip is required along the web edge, the register marks being printed in a narrow transverse strip between the image areas on the web. With such an arrangement, it is generally necessary to generate a "gating" pulse which allows the register control circuit to respond only when the narrow transverse strip is passing under the detector head; this prevents the control circuit from being influenced by signals representing marks within the image area. Bringing printed images into register with one another is known as print-to-print register control.
- A register control of a slightly different kind is required when a web on which a repeated image has been printed is to be subjected to an operation such as cutting or folding in register with the printed images. In such a case, one of the signals to be compared can be derived by sensing a register mark printed at the same time as the image print but the other signal must represent the position of the cutter or folder in its cycle of operation. Frequently, such a second signal is derived from the cutting or folding machine by a magnetic pick-up device.
- The present invention is particularly concerned with a register control of the kind in which an operation such as folding or cutting is to be performed on the web in register with a printed image.
- The present invention relates to printing apparatus having a web flow path extending from a printing cylinder, for printing repeat images and register marks on the web, to a machine operating in synchronism with the printing cylinder to perform a non-printing operation on the web in register with the printed images, the web flow path having a length such that it includes a number of printed images; according to the invention, a first mark detector is arranged in the flow path immediately after the printing cylinder, a second mark detector is arranged in the flow path immediately before the machine performing the non-printing operation, and a register control unit receives signals from the two detectors and adjusts register control means in accordance with any departure in the relative timing of the signals from a desired relative timing.
- For example, it may be required that for correct register the signals from the two detectors are received simultaneously by the register control unit; then any interval between the two signals indicates incorrect register and causes the generation of a control signal which may, for example, adjust the position of a compensating roller placed in the flow path so that the web passes over it.
- The present invention enables register control to be achieved between the printing operation and a cutting or folding operation without requiring a signal derived from the cutter or folder. It is able to achieve this result because the cutter or folder and the printing cylinder rotate in synchronism and the first detector is located immediately after the printing cylinder, i.e. at a position such that any dimensional change of the web between printing and mark detection is negligible; consequently, the signal derived from the first detector is effectively indicative of the position of the cutting cylinder. The signal from the second detector represents the mark position at the end of the web path between the printing cylinder and non-printing machine and, therefore, takes into account the effect of any stretch in the printed web along the flow path. Consequently, a comparison of the relative phases of these marks is indicative of the degree of register between the printed mark on the web close to the folding or cutting machine and the folding or cutting operation carried out by that machine.
- In the preferred embodiment, a code mark is printed ahead of the register mark to indicate to the control circuit that register control signals are to be expected from the detectors.
- In order that the invention may be better understood an example of apparatus embodying the invention will now be described with reference to the accompanying drawings.
- In Figure 1, a
web 10 from a supply roll 11 passes betweenprinting cylinders 12a and 12b driven by amotor 13 and then around rollers constituting a register compensation system. These rollers are the fixed rollers 14 and 16 and anintermediate roller 18 which can be adjusted in a direction perpendicular to the plane of the web in the principal direction of the web path. After leaving the register compensation system, the web passes through a cutting machine having cutting cylinders 20a and 20b, provided with a blade 22 from which emerge the printedcut sheets 10a; the cutting cylinders are also driven by themotor 13. - A
first detector 24 is arranged immediately after theprinting cylinders 12a and 12b. Asecond detector 26 is arranged immediately before the cutting cylinders 20a and 20b. Signals from the first and second detectors are applied to aregister control circuit 28, the output of which is an error signal which energises acontroller 30 to control the position of theintermediate roller 18. - As explained earlier, the printing cylinders and the rollers of the cutting machine are operating in synchronism with one another and with a given phase relationship. In order to maintain correct register the compensator must be adjusted so that the total number of images is equal to a whole numler of images plus a portion of an image corresponding to the difference in phase relation between the printing cylinder and a cutting cylinder. The first detector is closely adjacent the exit side of the printing cylinder and consequently, the signal which it generates on seeing a register mark printed by the printing cylinder is representative of the angular position of the printing cylinder and, therefore, of the cutting roller. The signal from the second detector on seeing a register mark takes into account any stretching of the web which has occurred as it passes along the flow path and which would otherwise prevent the above-mentioned desired phase relationship from being achieved. The error signal from the register control unit, indicative of such stretching, adjusts the compensating roller to modify the path length of the flow path and thereby to restore correct register.
- In Figure 2, a marginal portion of the
web 10 is shown in plan view withcode marks 32 andregister marks 34. Thecode marks 32 are recognised by the register control circuit and prepare that circuit for receiving the register control signals derived from themarks 34. It is an unusual feature of the invention that the marks from which the signals are derived for comparison are spaced by a large number of complete image lengths along the flow path. - It will be seen that the invention enables the printer to dispense with the conventional timer linked to the cutting or folding machine.
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8526249 | 1985-10-24 | ||
GB858526249A GB8526249D0 (en) | 1985-10-24 | 1985-10-24 | Register control apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0223405A1 true EP0223405A1 (en) | 1987-05-27 |
Family
ID=10587191
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86307935A Ceased EP0223405A1 (en) | 1985-10-24 | 1986-10-14 | Register control apparatus |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0223405A1 (en) |
JP (1) | JPS62101442A (en) |
GB (1) | GB8526249D0 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2600943A1 (en) * | 1986-03-17 | 1988-01-08 | Bobst Sa | METHOD AND DEVICE FOR CONTROLLING THE ADJUSTMENT OF THE ORGANS OF A MACHINE FOR GRAPHIC ARTS AND CARDBOARDING |
US5025725A (en) * | 1989-07-21 | 1991-06-25 | Seiko Instruments, Inc. | Double paper cut system for printer mechanism |
DE4212987A1 (en) * | 1992-04-18 | 1993-10-21 | Alfill Getraenketechnik | Method and device for conveying a material web |
US5452632A (en) * | 1992-10-12 | 1995-09-26 | Heidelberger Druckmaschinen Ag | Method for setting the cutting register on a cross-cutting device disposed downline of a web-fed printing press |
WO1998052754A1 (en) * | 1997-05-21 | 1998-11-26 | Koenig & Bauer Aktiengesellschaft | Method and device for drawing in a strip of material |
EP0893252A2 (en) * | 1997-07-24 | 1999-01-27 | Heidelberger Druckmaschinen Aktiengesellschaft | Apparatus for adjusting web tension after a chilling unit in a printing press |
US6564710B1 (en) * | 1998-10-31 | 2003-05-20 | CSAT Gesellschaft für Computer Systeme und Automations-Technik mit beschränkter Haftung | Apparatus for imprinting an unmarked foil |
WO2005124470A2 (en) * | 2004-06-21 | 2005-12-29 | Oce Printing Systems Gmbh | Printer or copier for printing an endless support material comprising transversal folds, and method for controlling such a printer or copier |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0753916Y2 (en) * | 1987-08-26 | 1995-12-13 | 三菱重工業株式会社 | Cutting position control device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB949415A (en) * | 1900-01-01 | |||
FR1456662A (en) * | 1965-08-03 | 1966-07-08 | John F Mccarthy Inc | Apparatus for controlling high speed processes including multi-color printing presses |
US3870936A (en) * | 1972-05-25 | 1975-03-11 | Hurletron Inc | Digital motor control system for web registration |
EP0131241A2 (en) * | 1983-07-06 | 1985-01-16 | AB Tetra Pak | Method and device for reading marks applied to a moving material web provided with a printed decoration using photoelectric means |
EP0146403A2 (en) * | 1983-12-19 | 1985-06-26 | THOMAS FORMAN & SONS LIMITED | Data integrity verification |
-
1985
- 1985-10-24 GB GB858526249A patent/GB8526249D0/en active Pending
-
1986
- 1986-10-14 EP EP86307935A patent/EP0223405A1/en not_active Ceased
- 1986-10-23 JP JP61250907A patent/JPS62101442A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB949415A (en) * | 1900-01-01 | |||
FR1456662A (en) * | 1965-08-03 | 1966-07-08 | John F Mccarthy Inc | Apparatus for controlling high speed processes including multi-color printing presses |
US3870936A (en) * | 1972-05-25 | 1975-03-11 | Hurletron Inc | Digital motor control system for web registration |
EP0131241A2 (en) * | 1983-07-06 | 1985-01-16 | AB Tetra Pak | Method and device for reading marks applied to a moving material web provided with a printed decoration using photoelectric means |
EP0146403A2 (en) * | 1983-12-19 | 1985-06-26 | THOMAS FORMAN & SONS LIMITED | Data integrity verification |
Non-Patent Citations (1)
Title |
---|
AUTOMATION, July 1965, pages 80-82; J. S. EINSTEIN: "Register control of web processes" * |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2600943A1 (en) * | 1986-03-17 | 1988-01-08 | Bobst Sa | METHOD AND DEVICE FOR CONTROLLING THE ADJUSTMENT OF THE ORGANS OF A MACHINE FOR GRAPHIC ARTS AND CARDBOARDING |
US5025725A (en) * | 1989-07-21 | 1991-06-25 | Seiko Instruments, Inc. | Double paper cut system for printer mechanism |
DE4212987A1 (en) * | 1992-04-18 | 1993-10-21 | Alfill Getraenketechnik | Method and device for conveying a material web |
US5421227A (en) * | 1992-04-18 | 1995-06-06 | Alfill Getranketechnik Gmbh | Method of subdividing webs |
US5452632A (en) * | 1992-10-12 | 1995-09-26 | Heidelberger Druckmaschinen Ag | Method for setting the cutting register on a cross-cutting device disposed downline of a web-fed printing press |
US6360665B1 (en) | 1997-05-21 | 2002-03-26 | Koenig & Bauer Aktiengesellschaft | Method and device for drawing in a strip of material |
WO1998052754A1 (en) * | 1997-05-21 | 1998-11-26 | Koenig & Bauer Aktiengesellschaft | Method and device for drawing in a strip of material |
EP0893252A2 (en) * | 1997-07-24 | 1999-01-27 | Heidelberger Druckmaschinen Aktiengesellschaft | Apparatus for adjusting web tension after a chilling unit in a printing press |
EP0893252A3 (en) * | 1997-07-24 | 1999-10-13 | Heidelberger Druckmaschinen Aktiengesellschaft | Apparatus for adjusting web tension after a chilling unit in a printing press |
US6564710B1 (en) * | 1998-10-31 | 2003-05-20 | CSAT Gesellschaft für Computer Systeme und Automations-Technik mit beschränkter Haftung | Apparatus for imprinting an unmarked foil |
WO2005124470A2 (en) * | 2004-06-21 | 2005-12-29 | Oce Printing Systems Gmbh | Printer or copier for printing an endless support material comprising transversal folds, and method for controlling such a printer or copier |
WO2005124470A3 (en) * | 2004-06-21 | 2006-06-08 | Oce Printing Systems Gmbh | Printer or copier for printing an endless support material comprising transversal folds, and method for controlling such a printer or copier |
US8437681B2 (en) | 2004-06-21 | 2013-05-07 | OCéPRINTING SYSTEMS GMBH | Printer or copier for printing an endless support material comprising transversal folds, and method for controlling such a printer or copier |
Also Published As
Publication number | Publication date |
---|---|
JPS62101442A (en) | 1987-05-11 |
GB8526249D0 (en) | 1985-11-27 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE GB IT LI |
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17P | Request for examination filed |
Effective date: 19871113 |
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17Q | First examination report despatched |
Effective date: 19890111 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: HARLAND CROSFIELD LIMITED |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
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18R | Application refused |
Effective date: 19910930 |
|
APAF | Appeal reference modified |
Free format text: ORIGINAL CODE: EPIDOSCREFNE |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: ISHERWOOD, JEFFREY |