NL2027362B1 - Method for testing properties of image receiving material and apparatus - Google Patents

Method for testing properties of image receiving material and apparatus Download PDF

Info

Publication number
NL2027362B1
NL2027362B1 NL2027362A NL2027362A NL2027362B1 NL 2027362 B1 NL2027362 B1 NL 2027362B1 NL 2027362 A NL2027362 A NL 2027362A NL 2027362 A NL2027362 A NL 2027362A NL 2027362 B1 NL2027362 B1 NL 2027362B1
Authority
NL
Netherlands
Prior art keywords
image
paper path
receiving material
printing
image receiving
Prior art date
Application number
NL2027362A
Other languages
Dutch (nl)
Inventor
J E G Verhofstad Wilhelmus
Nnafie Hassan
W M Severt Robert
Safari Fariba
E J Van Den Bercken Robert
G J C Kessels Gerardus
J W Van Vliembergen Eduardus
A P Van Stiphout Thijs
Original Assignee
Canon Production Printing Holding Bv
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 Canon Production Printing Holding Bv filed Critical Canon Production Printing Holding Bv
Priority to NL2027362A priority Critical patent/NL2027362B1/en
Priority to DE102022100489.9A priority patent/DE102022100489A1/en
Application granted granted Critical
Publication of NL2027362B1 publication Critical patent/NL2027362B1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/60—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing on both faces of the printing material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/009—Detecting type of paper, e.g. by automatic reading of a code that is printed on a paper package or on a paper roll or by sensing the grade of translucency of the paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/0009—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets control of the transport of the copy material
    • B41J13/0045—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets control of the transport of the copy material concerning sheet refeed sections of automatic paper handling systems, e.g. intermediate stackers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/44—Typewriters or selective printing mechanisms having dual functions or combined with, or coupled to, apparatus performing other functions
    • B41J3/46—Printing mechanisms combined with apparatus providing a visual indication

Landscapes

  • Accessory Devices And Overall Control Thereof (AREA)

Abstract

The invention relates to a method for testing image receiving material in a printing system. The printing system comprises a duplex paper path route for printing on both sides of the image receiving material, actuators along the paper path for performing actuator actions, and sensors along the paper path for measuring parameters of positioning, imaging and physical aspects, and a user interface for interacting with a user of the printing system. Besides a transport of the image receiving material along the paper path for forming a single-sided or double-sided printed image receiving material, the method comprises the steps of transporting the image receiving material one or more additional times through at least part of the paper path, the at least part comprising the duplex paper path route, and during the one or more additional times of transport the sensors additionally measuring parameters of positioning or imaging and the actuators additionally performing actuator actions.

Description

Method for testing properties of image receiving material and apparatus Field of the invention The invention relates to a method for testing image receiving material in a printing system, the printing system comprising a print controller for controlling of print jobs for printing images on the image receiving material, at least one input holder for loading the image receiving material, at least one output holder for receiving the printed image receiving material, a paper path comprising a duplex paper path route for printing on both sides of the image receiving material, actuators along the paper path for performing actuator actions, sensors along the paper path for measuring parameters of positioning, imaging and physical aspects, and a user interface for interacting with a user of the printing system, the method comprising the steps of the print controller retrieving a test print job comprising at least one image to be printed, transporting the image receiving material from the at least one input holder along the paper path to the atleast one output holder, during the transport the actuators executing actuator actions, and during the transport the sensors measuring parameters of positioning or imaging. The term “marking material” may hereinafter be abbreviated to “ink”. Nevertheless toner particles or toner pearls may also be interpreted as a kind of marking material.
The invention further relates to a print system which is configured to apply the method according to the invention. Background of the invention Currently actuator actions and sensor measurements are performed only once when image receiving material follows its normal simplex and/or duplex paper path route through the printing system. An actuator may be a print head printing a bitmap, or a fixation unit applying heat, pressure and airflow. In particular, the accuracy of the one-time measurements is sometimes not reliable enough to draw conclusions on image quality or productivity. There are also parameters of properties of an image receiving material which cannot be determined by transporting the image receiving material through the paper path only once. Summary of the invention According to the present invention the method for testing the image receiving material in the printing system, is improved by the steps of, besides a transport along the paper path for forming a single-sided or double-sided printed image receiving material, the method comprises the steps of transporting the image receiving material one or more additional times through at least part of the paper path, the at least part comprising the duplex paper path route, and during the one or more additional times of transport the sensors additionally measuring parameters of positioning or imaging and the actuators additionally performing actuator actions. By adding new, and/or re-using existing actuators and sensors along the paper path various quality aspects of the print process or the media can be monitored. By transporting (printed) sheets of image receiving material one or more times extra through the duplex paper path route before depositing the sheets in the output holder, the same printed sheet can undergo multiple actuations and/or multiple measurements.
The added actuators and sensors may be positioned in the duplex paper path route of the printing system or in a simplex paper path route of the printing system.
By allowing a sheet to travel at least twice through the duplex paper path route, expensive sensors located in the main (simplex) paper path can be re-used, as well as expensive paper path components (no-flip, pass-through paper path in duplex paper path route) can be made obsolete. For some tests with respect to the image receiving material multiple sheets may be transported through the duplex paper path route. Each sheet of the multiple sheets is transported multiple times through the duplex paper path route.
The invention is implemented by changes in the embedded software controlling the route of a sheet through the engine, and controlling the activation of actuators and sensors. Also the measurement analysis is adapted.
By allowing a sheet to travel at least twice through the duplex paper path route, the subsequent measurements may be fed to a machine learning system implemented in the print controller in order to determine property parameter values for the image receiving material being tested. The machine learning system may also be implemented in a central server/cloud implementation which is connected to the printing system via a network.
The extended use of the duplex paper path route may be done in a special operating mode of the printing system, although the invention is also applicable — for example occasionally — during normal operation for runtime monitoring.
According to an embodiment at least one of the actuators is a print head for printing the at least one image of the print job on the image receiving material by means of marking material.
According to an embodiment at least one of the actuators is a fixator for applying heat, pressure and/or air flow. According to an embodiment the step of additionally measuring parameters of positioning, imaging and physical aspects comprises multiple measurements of a same or similar sensor. By having multiple measurements of the same or similar sensors measurement errors can be reduced e.g. through software averaging. According to an embodiment the method comprises the step of taking the multiple measurements at different times by a same sensor, the different times being determined by a transport time of the image receiving material through the duplex paper path route. By having multiple measurements taken at different times by the same sensor trends can be identified. According to an embodiment the method comprises the step of taking the multiple measurements by similar sensors at different locations along the paper path. By doing so, long-term behaviour can be detected, for example an increasing amount of ink coverage. According to an embodiment the step of additionally performing actuator actions comprises multiple times actuating a same fixator during multiple passes through the same fixator in order to measure an accelerated lifetime effect on the image receiving material by means of the sensors. For example, a colour drift caused by drying, which is normally observed after a few hours, can be measured and predicted more reliably. The colour drift may be measured by means of an inline spectrophotometer.
According to an embodiment the step of additionally performing actuator actions comprises multiple times actuating the print head during multiple passes through the print head and during each pass of the multiple passes printing a part of a test pattern at a neighbouring position in such a way that a single image recording material comprises the parts of the test pattern printed at various points in time and with a various number of fixations applied. By doing so, the image analysis of the test pattern is simplified. According to an embodiment the step of additionally performing actuator actions comprises multiple times actuating a same fixator during multiple passes through the same fixator before printing any image on the image receiving material. By transporting a sheet first without printing, the sheet will be pre-heated by the fixator. Depending on the amount of passes the temperature might vary, and measurement results can be more representative. Transporting and measuring an empty sheet may be used to determine reference values for measurements to be conducted at a printed sheet.
According to an embodiment the step of additionally measuring parameters of positioning or imaging comprises measuring image receiving material characteristics like colour, size, pre-printed content and/or pre-punched locations before printing any image on the image receiving material.
According to an embodiment at least one of the actuators is a smudge actuator and at least one of the sensors is an inline scanner, and the method comprises the step of the smudge actuator applying a predefined pressure on the image receiving material in order to induce smudges on the image receiving material and a subsequent step of the inline scanner scanning the image receiving material, wherein the predefined pressure depends on characteristics of the image receiving material. A characteristic of the image receiving material which may be relevant for the pressure applied by the smudge actuator are a weight of the image receiving material, a thickness of the image receiving material and/or a stiffness of the image receiving material.
According to an embodiment the method comprises the steps of printing and fixing a test pattern with alternating marking material patches and blank patches on the image receiving material and the step of additionally performing actuator actions comprises at least one time of actuating the smudge actuator during at least one pass through the paper path, and the step of additionally measuring parameters of positioning, imaging and physical aspects comprises scanning the printed and fixed test pattern by the inline scanner and determining through image analysis a size of a largest smudge in each of the blank patches.
5 According to an embodiment print settings of the test print job comprise at least one out of a test print job indication, a number of passes through the duplex paper path route and an indication of a simplex or duplex print mode for the test print job. In another embodiment the print settings of the test print job may be entered via the user interface of the printing system.
The present invention also relates to a printing system for printing an image on an image receiving material, the print system comprising a print controller for controlling of print jobs for printing images on the image receiving material, at least one input holder for loading the image receiving material, at least one output holder for receiving the printed image receiving material, a paper path comprising a duplex paper path route for printing on both sides of the image receiving material, actuators along the paper path for performing actuator actions, sensors along the paper path for measuring parameters of positioning, imaging and physical aspects, and a user interface for interacting with a user of the printing system, wherein the print system is configured to execute the steps of the method according to the invention.
The present invention also relates to a software medium comprising computer executable program code which, when executed by a computer, causes the computer to perform the steps of the method according to the invention.
Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration only, since various changes and modifications within the scope of the invention will become apparent to those skilled in the art from this detailed description.
Brief description of the drawings FIG. 1 shows schematically a printing system in which the method according to the invention is applicable.
FIG. 2 shows a first flow diagram of a method according to the invention.
FIG. 3 shows a second flow diagram of a method according to the invention.
Detailed description of the embodiments A number of embodiments will now be described in conjunction with the drawings, in which same reference numerals refer to like elements.
FIG. 1 shows schematically a printing system 1 in which the method according to the invention is applicable.
The printing system 1 comprises an output section 5, a print engine and control section 3, a local user interface 7 and an input section 4. The output section 5 comprises two output holders 51, 52 for holding printed image receiving material.
The printed image receiving material is transported from the print engine and control section 3 via an inlet 53 to the output section 5. The output section 5 is digitally connected by means of a cable 60 to the print engine and control section 3 for bi-directional data signal transfer.
The print engine and control section 3 comprises a print engine and a print controller (not shown) for controlling the printing process.
The print controller is a computer or server or a workstation, connected to the print engine and connected to the digital environment of the printing system 1, for example a network for transmitting a submitted print job to the printing system.
The test print jobs are usually stored beforehand in the print controller.
The print engine comprises a print head or print assembly 31 for ejecting or fixing marking material to the image receiving material and a paper path 34, 32, 35 for transporting the image receiving material from an entry point 36 of the print engine and control section 3 to the inlet 53 of the output section 5. The print head or print assembly 31 is positioned near the paper path section 34. While an image receiving material is transported along the paper path section 34, the image receiving material receives the marking material from the print head or print assembly 31. A next paper path section 32 is a flip unit for selecting a different subsequent paper path for simplex or duplex printing of the image receiving material.
The flip unit 32 may be also used to flip a printed sheet of image receiving material after printing in simplex mode before the printed sheet leaves the print engine and control section 3 via a curved section 38 of the flip unit 32 and via the inlet 53 to the output section 5. In another embodiment of the printing system the curved section 38 of the flip unit 32 is not present and the turning of a simplex page has to be done via another paper path section 35 and leads to productivity loss.
In another embodiment of the printing system an additional turning station - partly to replace the curved section 38 of the flip unit 32 - is configured outside the print engine and control section 3 between the print engine and control section 3 and the output section 5. When the image receiving material has to be printed in a simplex mode, the image receiving material may directly by transported via the flip unit 32 to the inlet 53 of the output section 5. When the image receiving material has to be printed in a duplex mode, the image receiving material is transported via the flip unit 32 to the duplex paper path section 35 for turning the image receiving material in order to switch front side and back side of the sheets.
The sheets are then transported to the paper path section 34 again for printing on the rear side of the sheets by means of the print head or print assembly 31. After printing on the image receiving material the sheets are transported to the inlet 53 of the output section 5. The input section 4 comprises a plurality of input holders 44, 45, 46 for holding the image receiving material before transporting the sheets of image receiving material to the print engine and control section 3. Sheets of image receiving material are guided from the input holders 44, 45, 46 by guiding means 42, 43, 47 to an outlet 36 for entrance in the print engine and control section 3. Sheets of image receiving material are now guided from the input holders 44, 45, 46 to the right side of the input holders 44, 45, 46, but other configurations of the input holders may be envisioned for at least partly guiding the sheets to the left side.
Also a central entrance from the plurality of input holders 44, 45, 46 into the print engine and control section 3 may be envisioned.
The paper path sections 34, 32, 35 comprise several actuators 31, 39, 313 and several sensors 37, 33, 310, 311, 312. In this example the actuator 31 is the print head, the actuator 39 is a fixator for fixing the marking material to the image receiving material, the actuator 313 is a smudge actuator, the sensors 33, 311 are inline scanners, the sensor 37 is an inline spectrophotometer.
Besides a transport along the paper path sections 34, 32, 35 for forming a single-sided or double-sided printed image receiving material, according to the invention the image receiving material is transported one or more additional times through at least part of the paper path, the at least part comprising the duplex paper path route 35. During the one or more additional times of transport at least one of the sensors 37, 33, 310, 311, 312 is additionally measuring parameters of positioning or imaging and at least one of the actuators 31, 39, 313 additionally may perform actuator actions.
An ink layer that is not robust, can easily be damaged when a printed sheet is transported through the paper path sections 34, 32, 35 of the printing system. Visible examples of such damages are scratches in the ink layer if ink is removed, or smudges in unprinted areas, if removed ink is deposited on blank areas on the printed sheet or on parts of the printing system. The smudge actuator 313 comprises a mechanical part which presses on a printed sheet. By scanning the induced scratches and smudges on the printed sheet, an effect of scratches and smudges is measured.
The robustness of an ink layer is determined by multiple factors: ink recipe, maximum amount of ink applied, use of primer, fixation process settings and properties of the image receiving material. In order to select the best engine settings for a specific image receiving material, e.g. fixation temperature and fixation time, amount of ink and primer, an automatic inline test is integrated in the printing system. The inline test comprises a test print job in combination with at least one activation of the smudge actuator 313 and afterwards a sensor measurement by the inline scanner 311. By doing so, the operator can automatically establish the best settings for making robust prints, instead of going through a manual trial-and-error process.
The test print job may comprise a test chart with alternating ink patches and white patches intended to be printed and fixated. The printed sheet is transported underneath the smudge actuator 313 with the mechanical part which presses with a well-defined and constant pressure on the printed sheet. The mechanical part is made of the same material as the paper path with comparable mechanical load conditions, such as applied pressure and mechanical contact with the image receiving material. Different load conditions may also be set if necessary.
Next the image is scanned by the inline scanner 311, and through image analysis the size of the largest smudge in each of the white areas is determined. Based on these measurements a metric for the amount of smudges is established. The amount of a smudge may be measured in an amount of pixels dpi which equals the resolution of the inline scanner 311. If the size exceeds an empirically and/or perceptually determined threshold the ink/primer combination on the test chart is disapproved. The threshold value also depends on a stiffness of the image receiving material. In order to address measurement variations, multiple sheets and/or multiple non-ink patches are tested and a majority voting algorithm may determine a final rating for a specific ink/primer combination.
The measurement algorithm may for example contain the following steps: [0 Convert RGB scan image to HLS image. [1 Select L-channel for subsequent processing steps, assuming a white media colour. D Locate fiducials in the scanned image to identify the location of the test patterns 0 Determine correction factors for reducing scanner illumination variation D Determine the range of L-values of the patch colour (via histogram evaluation) D Determine the range of L-values of the media background (at same position as smudge tool, via histogram evaluation) O Apply illumination correction factors [0 For each of the non-ink areas: o Identify the non-ink area boundaries at the location of the smudge actuator o Apply illumination correction factors o Exclude all pixels belonging to the media background range, leaving smudge pixels o Threshold image o Determine 8-connected components o Determine size in pixels of largest connected component For rating the smudge, the largest connected-component of all non-ink areas is selected and compared to a threshold value. Given the initial default printing system settings of the printing system 1, ink coverage and primer amount several ink, a marking material coverage and primer amounts around these default settings are tested, starting with the lowest amount of primer and increasing ink coverage. As soon as a disapproval occurs, the ink amount is reset to the lowest value and primer amount increased. In this way the boundary between acceptable and unacceptable robustness is located. In order to speed up this test strategy, it is considered acceptable to print multiple sheets with increasing amount of ink/primer consecutively at full speed, before evaluating their ratings, because of the limited amount of ink involved.
100107NLO1 10 If all combinations result in a disapproval, there is no operating latitude. In this case engine set points need to be changed, and the robustness test need to be repeated.
By performing this sequence for varying amounts of ink, primer and fixation setpoints, the best possible settings for an image receiving material are established. The sequence can be performed during multiple passes of the image receiving material through the duplex paper path route 35.
Control and orchestration of this sequence of measurements and actuations can be handled automatically by the embedded engine control software installed in the print controller. By doing so, the test procedure is automated as well as faster, since the procedure is integrated in the printing system and will be done at the customer's site, also taking into account possible climate effects. FIG. 2 shows a first flow diagram of a method for testing the image receiving material in the printing system according to the invention. The method starts in a start point A which leads to a first step S1. In the first step S1 of the method the print controller retrieves from storage of the print controller the test print job comprising at least one image to be printed. The test print job may be added to a print job queue residing in the print controller. The test print job may have an indication item indicating that the print job is only used for test purposes. The test print job may have another indication item whether or not the test print job must be executed in a separate test mode of the printing system. The test print job may comprise at least one test pattern dedicated to investigating a particular property of the image receiving material. In another embodiment the test print job is generated by the print controller. In another embodiment the print settings of the test print job may be entered via the user interface of the printing system. In a second step S2 the image receiving material is transported from the at least input holder along the paper path to the at least one output holder.
100107NLO1 11 In a third step S3 the actuators execute actuator actions during the transport. In a fourth step S4 the sensors are measuring parameters of positioning or imaging during the transport.
The third step S3 and the fourth step S4 are intended to be performed during the transport in the second step S2. The third step S3 and the fourth step S4 may be combined in such a way that the execution of the actuators and the measurements by means of the sensors is in line with a sequence order of the positions of the actuators and the sensors along the paper path of the printing system.
Until so far, the transport of at least one sheet along the paper path results in a single- sided or double-sided printed image receiving material.
In a fifth step S5 the image receiving material is transported one or more additional times through at least part of the paper path. The at least part comprises the duplex paper path route. By doing so, the actual paper path for the test print job is extended in length and thus also in time.
In another embodiment the fifth step S5 is executed after the third step S3 and before the fourth step S4. The third step S3, the fourth step S4 and the fifth step S5 may be partially shuffled and intermingled when executed.
In a sixth step S6 the sensors additionally measure parameters of positioning or imaging and the actuators additionally perform actuator actions during the one or more additional times of transport. The sixth step S6 is intended to be executed during the fifth step S5. The measured parameter values are stored in storage of the print controller and analytic software tools for trend analysis and machine learning are used to work up the measured parameter values to values or value ranges of properties of the image receiving material. The deduced values or value ranges of the properties of the image receiving material may be stored in a media catalogue which is residing in the print controller and contains information of the available image receiving materials. Also the initial measured parameter values may be stored. Instead of storing the values in the storage of the print controller, the values may be stored in a central server or cloud
100107NLO1 12 storage. The method ends in an end point B. FIG. 3 shows a second flow diagram of a method for testing the image receiving material in the printing system according to the invention. The method starts in a start point C which leads to a first step T1.
According to the first step T1 of the method the print controller retrieves from storage of the print controller the test print job comprising at least one image to be printed. The test print job may be added to a print job queue residing in the print controller. The test print job may have an indication item indicating that the print job is only used for test purposes. The test print job may have another indication item whether or not the test print job must be executed in a separate test mode of the printing system. The test print job may comprise at least one test pattern dedicated to investigating a particular property of the image receiving material. The test print job comprises a setting that indicates how many times the image receiving material has to be transported through the duplex paper path route. The number of times of the setting is indicated in the flow diagram with the capital Y. According to the method of the invention the number of times Y is at least 2. In another embodiment the test print job is generated by the print controller. In another embodiment the print settings of the test print job may be entered via the user interface of the printing system.
Ina second step T2 the print controller reads the number of time Y of transport of the sheet(s) through the duplex paper path route.
In a third step T3 a counter i is initialised and set to zero. The counter i indicates the number of times the duplex paper path route has already been traversed.
In a fourth step T4 the counter i is compared with the number of times Y. If the counter i is lower than Y, the method proceeds to a fifth step T5. If the counter i is equal to Y, the method ends in end point D.
Inthe fifth step T5 the counter i is incremented by one.
In a sixth step T6 the transport of the sheet(s) along the duplex paper path route is started.
In a seventh step T7 the actuators execute actuator actions during the transport and the sensors are measuring parameters of positioning or imaging during the transport. The execution of the actuators and the measurements by means of the sensors is in line with a sequence order of the positions of the actuators and the sensors along the paper path of the printing system.
After the seventh step T7 the method returns to the fourth step T4. According to the second flow diagram of the method the actual paper path for the test print job is extended in length and thus also in time which extension leaves room for trend analysis in time and space and for application of machine learning algorithms. Embodiments
1. Method for testing image receiving material in a printing system, the printing system comprising a print controller for controlling of print jobs for printing images on the image receiving material, at least one input holder for loading the image receiving material, at least one output holder for receiving the printed image receiving material, a paper path comprising a duplex paper path route for printing on both sides of the image receiving material, actuators along the paper path for performing actuator actions, sensors along the paper path for measuring parameters of positioning, imaging and physical aspects, and a user interface for interacting with a user of the printing system, the method comprising the steps of - the print controller retrieving a test print job comprising at least one image to be printed, - transporting the image receiving material from the at least one input holder along the paper path to the at least one output holder, - during the transport the actuators executing actuator actions, - during the transport the sensors measuring parameters of positioning or imaging, wherein, besides a transport along the paper path for forming a single-sided or double- sided printed image receiving material, the method comprises the steps of
100107NLO1 14 - transporting the image receiving material one or more additional times through at least part of the paper path, the at least part comprising the duplex paper path route, and - during the one or more additional times of transport the sensors additionally measuring parameters of positioning or imaging and the actuators additionally performing actuator actions.
2. Method according to claim 1, wherein at least one of the actuators is a print head for printing the at least one image of the print job on the image receiving material by means of marking material.
3. Method according to any of the preceding claims, wherein at least one of the actuators is a fixator for applying heat, pressure and/or air flow.
4. Method according to any of the preceding claims, wherein the step of additionally measuring parameters of positioning, imaging and physical aspects comprises multiple measurements of a same or similar sensor.
5. Method according to claim 4, wherein the method comprises the step of taking the multiple measurements at different times by a same sensor, the different times being determined by a transport time of the image receiving material through the duplex paper path route.
6. Method according to claim 4 or 5, wherein the method comprises the step of taking the multiple measurements by similar sensors at different locations along the paper path.
7. Method according to any of the preceding claims, wherein the step of additionally performing actuator actions comprises multiple times actuating a same fixator during multiple passes through the same fixator in order to measure an accelerated lifetime effect on the image receiving material by means of the sensors.
8. Method according to any of the preceding claims, wherein the step of additionally performing actuator actions comprises multiple times actuating the print head during multiple passes through the print head and during each pass of the multiple passes printing a part of a test pattern at a neighbouring position in such a way that a single image recording material comprises the parts of the test pattern printed at various points in time and with a various number of fixations applied.
9. Method according to any of the preceding claims, wherein the step of additionally performing actuator actions comprises multiple times actuating a same fixator during multiple passes through the same fixator before printing any image on the image receiving material.
10. Method according to any of the preceding claims, wherein the step of additionally measuring parameters of positioning or imaging comprises measuring image receiving material characteristics like colour, size, pre-printed content and/or pre-punched locations before printing any image on the image receiving material.
11. Method according to any of the preceding claims, wherein at least one of the actuators is a smudge actuator and at least one of the sensors is an inline scanner, and the method comprises the step of the smudge actuator applying a predefined pressure on the image receiving material in order to induce smudges on the image receiving material and a subsequent step of the inline scanner scanning the image receiving material, wherein the predefined pressure depends on characteristics of the image receiving material.
12. Method according to claim 11, wherein the method comprises the steps of printing and fixing a test pattern with alternating marking material patches and blank patches on the image receiving material and the step of additionally performing actuator actions comprises at least one time of actuating the smudge actuator during at least one pass through the paper path, and the step of additionally measuring parameters of positioning, imaging and physical aspects comprises scanning the printed and fixed test pattern by the inline scanner and determining through image analysis a size of a largest smudge in each of the blank patches.
13. Method according to any of the preceding claims, wherein print settings of the test print job comprises at least one out of a test print job indication, a number of passes through the duplex paper path route and an indication of a simplex or duplex print mode for the test print job.
100107NLO1 16
14. Printing system for printing an image on an image receiving material, the print system comprising a print controller for controlling of print jobs for printing images on the image receiving material, at least one input holder for loading the image receiving material, at least one output holder for receiving the printed image receiving material, a paper path comprising a duplex paper path route for printing on both sides of the image receiving material, actuators along the paper path for performing actuator actions, sensors along the paper path for measuring parameters of positioning, imaging and physical aspects, and a user interface for interacting with a user of the printing system, wherein the print system is configured to execute the steps of the method according to any of the claims 1 - 13.
15. Software medium comprising computer executable program code which, when executed by a computer, causes the computer to perform the steps of the method according to any of the claims 1 — 13. The skilled person will recognise that other embodiments are possible within the scope of the appended claims.

Claims (10)

CONCLUSIESCONCLUSIONS 1. Werkwijze voor het testen van beeldontvangstmateriaal in een druksysteem, dat een drukbesturing voor het besturen van druktaken om beelden op het beeldontvangstmateriaal te drukken, tenminste een invoerhouder voor het laden van beeldontvangstmateriaal, tenminste een uitvoerhouder voor het ontvangen van het gedrukte beeldontvangstmateriaal, een papierpad dat een duplex papierpadroute voor het drukken op beide zijden van het beeldontvangstmateriaal omvat, actuatoren langs het papierpad voor het uitvoeren van actuator acties, sensoren langs het papierpad voor het meten van parameters betreffende positionering, afbeelding en fysieke aspecten, en een gebruikersinterface voor interactie met een gebruiker van het druksysteem omvat, de werkwijze omvattende de stappen van - het opzoeken door de drukbesturing van een testdruktaak die tenminste een te drukken beeld omvat, -het transporteren van het beeldontvangstmateriaal van de tenminste een invoerhouder langs het papierpad naar de tenminste een uitvoerhouder, - het uitvoeren van actuator acties door de actuatoren tijdens het transport, - het meten van parameters betreffende positionering, afbeelding en fysieke aspecten door de sensoren tijdens het transport, waarbij, behalve een transport langs het papierpad voor het vormen van een enkelzijdig of dubbelzijdig bedrukt beeldontvangstmateriaal, de werkwijze de stappen omvat van - het transporteren van het beeldontvangstmateriaal een of meer additionele keren door tenminste een deel van het papierpad, welk tenminste een deel de duplex papierpadroute omvat, en - het additioneel meten van parameters betreffende positionering, afbeelding en fysieke aspecten door de sensoren en het additioneel uitvoeren van actuator acties door de actuatoren tijdens de een of meer additionele keren.A method for testing image receptor material in a printing system, comprising a pressure controller for controlling printing tasks to print images on the image receptor material, at least one input container for loading image receptor material, at least one output container for receiving the printed image receptor material, a paper path comprising a duplex paper path route for printing on both sides of the image-receiving material, actuators along the paper path for performing actuator actions, sensors along the paper path for measuring parameters regarding positioning, image and physical aspects, and a user interface for interacting with a user of the printing system, the method comprising the steps of - locating by the print control a test print job comprising at least one image to be printed, - transporting the image receptor material from the at least one input container along the paper path to the at least an output container, - performing actuator actions by the actuators during transport, - measuring parameters regarding positioning, image and physical aspects by the sensors during transport, wherein, in addition to transport along the paper path to form a single-sided or double-sided printed image receptor material, the method comprises the steps of - transporting the image receptor material one or more additional times through at least a part of the paper path, the at least part comprising the duplex paper path route, and - additionally measuring parameters regarding positioning, imaging and physical aspects by the sensors and additionally performing actuator actions by the actuators during the one or more additional times. 2. Werkwijze volgens conclusie 1, waarbij tenminste een van de actuatoren een drukkop is voor het drukken van het tenminste een beeld van de druktaak op het beeldontvangstmateriaal met behulp van markeermateriaal en tenminste een van de actuatoren een fixator is voor het toevoegen van warmte, druk en/of luchtstroom.A method according to claim 1, wherein at least one of the actuators is a print head for printing the at least one image of the printing task on the image receiving material using marking material and at least one of the actuators is a fixator for adding heat, pressure and/or airflow. 3. Werkwijze volgens conclusie 1, waarbij de werkwijze de stap omvat van het nemen van de meerdere metingen op verschillende tijden door eenzelfde sensor, welke verschillende tijden bepaald worden door een transporttijd van het beeldontvangstmateriaal door de duplex papierpadroute.The method of claim 1, wherein the method comprises the step of taking the plurality of measurements at different times by the same sensor, the different times being determined by a transport time of the image-receiving material through the duplex paper path route. 4. Werkwijze volgens conclusie 1, waarbij de werkwijze de stap omvat van het nemen van meerdere metingen door soortgelijke sensoren op verschillende locaties langs het papierpad.The method of claim 1, wherein the method comprises the step of taking multiple measurements by similar sensors at different locations along the paper path. 5. Werkwijze volgens een der voorafgaande conclusies, waarbij de stap van het additioneel uitvoeren van actuator acties het meerdere keren actueren van eenzelfde fixator omvat tijdens meerdere doorvoeren langs de zelfde fixator met het doel om een versneld levensduureffect van het ontvangstbeeldmateriaal te meten door middel van de sensoren.A method according to any one of the preceding claims, wherein the step of additionally performing actuator actions comprises actuating the same fixator multiple times during multiple passes along the same fixator for the purpose of measuring an accelerated lifetime effect of the receiving image material by means of the sensors. 6. Werkwijze volgens een der voorafgaande conclusies, waarbij de stap van het additioneel uitvoeren van de actuator acties het meerdere keren actueren van de drukkop tijdens meerdere doorvoeren langs de drukkop omvat, alsook het afdrukken van een deel van een testpatroon op een aangrenzende positie tijdens iedere doorvoer van de meerdere doorvoeren op een zodanige wijze dat een enkel beeldontvangstmateriaal de delen van het testpatroon omvat die gedrukt zijn op verschillende momenten in de tijd en met een verschillende aantal toegepaste fixaties.The method of any preceding claim, wherein the step of additionally performing the actuator actions comprises actuating the printhead multiple times during multiple passes along the printhead, as well as printing a portion of a test pattern at an adjacent position during each passing the plurality of feedthroughs in such a way that a single image-receiving material includes the portions of the test pattern printed at different times in time and with a different number of fixations applied. 7. Werkwijze volgens een der voorafgaande conclusies, waarbij tenminste een van de actuatoren een vlekkenactuator en tenminste een van de sensoren een inline scanner is, en de werkwijze de stap omvat van het uitoefenen van een voordefinieerde drukkracht door de vlekkenactuator op het beeldontvangstmateriaal met het doel om vlekken te veroorzaken op het beeldontvangstmateriaal en een opvolgende stap van het scannen door de inline scanner van het beeldontvangstmateriaal, waarbij de voorgedefinieerde drukkracht afhangt van karakteristieken van het beeldontvangstmateriaal.A method according to any one of the preceding claims, wherein at least one of the actuators is a spot actuator and at least one of the sensors is an inline scanner, and the method comprises the step of applying a predefined pressure force by the spot actuator to the image-receiving material with the target to cause spots on the image receptor material and a subsequent step of scanning through the inline scanner of the image receptor material, the predefined pressing force depending on characteristics of the image receptor material. 8. Werkwijze volgens conclusie 7, waarbij de werkwijze de stappen omvat van het afdrukken en fixeren van een testpatroon met afwisselend markeermateriaalstukken en blanke stukken op het beeldontvangstmateriaal en de stap van het additioneel uitvoeren van actuator acties het tenminste een keer actueren van de vlekkenactuator omvat tijdens tenminste een doorvoer langs het papierpad, en de stap van het additioneel meten van parameters betreffende positionering, afbeelding en fysieke aspecten het scannen van het afgedrukte en gefixeerde testpatroon door de inline scanner en het bepalen een grootte van een grootste vlek in ieder van de blanke stukken door middel van beeldanalyse omvat.A method according to claim 7, wherein the method comprises the steps of printing and fixing a test pattern with alternating marking material pieces and blanks on the image-receiving material and the step of additionally performing actuator actions comprises actuating the spot actuator at least once during at least one pass along the paper path, and the step of additionally measuring parameters regarding positioning, imaging and physical aspects, scanning the printed and fixed test pattern by the inline scanner and determining a size of a largest spot in each of the blanks by means of image analysis. 9. Druksysteem voor het afdrukken van een beeld op een beeldontvangstmateriaal, welk druksysteem een drukbesturing voor het besturen van druktaken voor het drukken van beelden op het beeldontvangstmateriaal, tenminste een invoerhouder voor het laden van het beeldontvangstmateriaal, tenminste een uitvoerhouder voor het ontvangen van het bedrukte beeldontvangstmateriaal, een papierpad dat een duplex papierpadroute voor het drukken op beide zijden van het beeldontvangstmateriaal, actuatoren langs het papierpad voor het uitvoeren van actuator acties, sensoren langs het papierpad voor het meten van parameters betreffende positionering, afbeelding en fysieke aspecten, en een gebruikersinterface voor interactie met een gebruiker van het druksysteem omvat, waarbij het druksysteem geconfigureerd is om de stappen van de werkwijze volgens een der conclusies 1 — 8 uit te voeren.9. Printing system for printing an image on an image-receiving material, said printing system a pressure controller for controlling printing tasks for printing images on the image-receiving material, at least one input container for loading the image-receiving material, at least one output container for receiving the printed material image receptor material, a paper path that provides a duplex paper path route for printing on both sides of the image receptor material, actuators along the paper path for performing actuator actions, sensors along the paper path for measuring parameters related to positioning, image and physical aspects, and a user interface for interacting with a user of the printing system, wherein the printing system is configured to perform the steps of the method according to any one of claims 1-8. 10. Software medium dat een door een computer uitvoerbare programmacode omvat welke, wanneer uitgevoerd door een computer, de computer in staat stelt om de stappen van de werkwijze volgens een der conclusies 1 — 8 uit te voeren.A software medium comprising a computer executable program code which, when executed by a computer, enables the computer to perform the steps of the method according to any one of claims 1-8.
NL2027362A 2021-01-21 2021-01-21 Method for testing properties of image receiving material and apparatus NL2027362B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL2027362A NL2027362B1 (en) 2021-01-21 2021-01-21 Method for testing properties of image receiving material and apparatus
DE102022100489.9A DE102022100489A1 (en) 2021-01-21 2022-01-11 METHOD AND DEVICE FOR TESTING PROPERTIES OF IMAGE-RECEPTION MATERIAL

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2027362A NL2027362B1 (en) 2021-01-21 2021-01-21 Method for testing properties of image receiving material and apparatus

Publications (1)

Publication Number Publication Date
NL2027362B1 true NL2027362B1 (en) 2022-08-05

Family

ID=76375577

Family Applications (1)

Application Number Title Priority Date Filing Date
NL2027362A NL2027362B1 (en) 2021-01-21 2021-01-21 Method for testing properties of image receiving material and apparatus

Country Status (2)

Country Link
DE (1) DE102022100489A1 (en)
NL (1) NL2027362B1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6736390B2 (en) * 2000-01-21 2004-05-18 Canon Kabushiki Kaisha Sheet re-feed device and image forming apparatus
WO2016177676A1 (en) * 2015-05-07 2016-11-10 Oce-Technologies B.V. Printing system
EP3204231A1 (en) * 2014-10-08 2017-08-16 OCE-Technologies B.V. Printing system and method for defect detection in a printing system
EP3450185A1 (en) * 2017-09-01 2019-03-06 OCE Holding B.V. Defect detection for print media
US20210008907A1 (en) * 2019-07-11 2021-01-14 Xerox Corporation System and method for recirculating purge media in a sheet printer to attenuate the drying of ink from inkjets in a printhead during periods of partial printhead inactivity

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6736390B2 (en) * 2000-01-21 2004-05-18 Canon Kabushiki Kaisha Sheet re-feed device and image forming apparatus
EP3204231A1 (en) * 2014-10-08 2017-08-16 OCE-Technologies B.V. Printing system and method for defect detection in a printing system
WO2016177676A1 (en) * 2015-05-07 2016-11-10 Oce-Technologies B.V. Printing system
EP3450185A1 (en) * 2017-09-01 2019-03-06 OCE Holding B.V. Defect detection for print media
US20210008907A1 (en) * 2019-07-11 2021-01-14 Xerox Corporation System and method for recirculating purge media in a sheet printer to attenuate the drying of ink from inkjets in a printhead during periods of partial printhead inactivity

Also Published As

Publication number Publication date
DE102022100489A1 (en) 2022-07-21

Similar Documents

Publication Publication Date Title
US10623605B2 (en) Method for image inspection of printed products using adaptive image smoothing
JP2957359B2 (en) Qualitative determination of printed sheets
JP6738269B2 (en) Method for checking image inspection system
EP4095800A1 (en) Inspection apparatus and inspection program
CN109507207B (en) Method for waste page management in a machine for processing printing material by means of a computer
JP6162085B2 (en) Printed product inspection apparatus, inspection method, and program
JP4470500B2 (en) Printed matter inspection apparatus, printed matter inspection method, and image forming apparatus
EP0836153A2 (en) Print mode selection method and apparatus
US10110756B2 (en) Image processing apparatus and image processing method
JP6256530B2 (en) Special processing indicator for print verification system
US11501425B2 (en) Verification apparatus and information processing method for selecting an image associated with a reference image
JP2018114753A (en) Method for automatic process control of digital printer
US9925810B2 (en) Method for approving a new print medium for use in a print system
NL2027362B1 (en) Method for testing properties of image receiving material and apparatus
US11970014B2 (en) Method for profiling a print medium for use in a printing system
JP2021135197A5 (en)
US7184177B2 (en) Method, apparatus and article of manufacture for modifying printing based upon direct on-the-fly media characteristic parameters
US20100171971A1 (en) Printing apparatus, color correcting method, and program
JP4623948B2 (en) Equipment for quality control in printed materials
CN113276576A (en) Information processing apparatus, recording medium, and information processing method
US12076976B2 (en) Optimized printing defect compensation using automatic job image repositioning
JP2005208422A (en) Fixing roll streak inspecting device and control device
US20180141334A1 (en) Printing system for cut sheets and a method therefor
US20210129563A1 (en) Method of printing on media of a given media type
JP7302435B2 (en) Image processing system and server