JPS61182173A - Method and apparatus for detecting mark in shield area - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to mark sensing@necks for sensing the relative position of marks printed on a moving web material, and in particular to sensing the relative position of marks printed on a moving web material. The present invention relates to a mark sensing method and a sensing apparatus for detecting a scheduled register mark on a moving film located around the register mark.

[Prior Art and Problems] Composite materials have been increasingly used in packaging applications over the past few years because they are superior to traditional paperboard and paperboard in many applications due to their high strength, low cost, and properties. It has become. A typical composite material ■ consists of a thin layer of plastic film adhered to a relatively thick layer of paperboard material. A method for manufacturing such composite materials is described in A.D. Peer, Jr.'s "Composite Materials for Containers and Sub-Packaging" 1981.
No. 4,254,173, issued March 3, 2006.

During high speed ISl production of composite materials of the type described in U.S. Pat. It is tightly attached to a continuously moving plastic film. During such high speed lamination operations, the relatively thin plastic film web is subjected to a number of conditions that cause it to shrink and stretch before being laminated to the paperboard web. Composite materials used in packaging may have graphics sets printed repeatedly onto a plastic film web, and thus the stretching and sagging of the plastic film web must be controlled to provide a composite material with graphics of precise predetermined dimensions. Control is essential.

A method and apparatus for controlling the longitudinal dimension of each set of repeating graphics sets on a moving film web is described by Haak, Fowler & Janssen, ``Stretch Controlled Lamination Apparatus,'' 19
US Patent Application No. 441,276 filed November 12, 1982
listed in the number.

As described in the Harksen U.S. Patent Application, an essential part of the film stretch control fll device is to control the film length at a specific location on the film web located at a predetermined location in each successive equal length section of the film lab. This is a monitor function that monitors the passage of a fixed mark. The marks of the Haake et al. patent application are sensed by a high speed photoelectric device, the monitor signal from which also receives a signal representing the velocity of the film web, and from these two signals high speed data is used to calculate the distance between the marks. Processed by a processing device. The information thus +Fj is then used to relative the film web before laminating it to the paperboard in order to provide a composite material with precisely dimensioned graphics and equal length sections. It is used to make friends or make friends. The marks printed on the film web described in the U.S. patent application of Haack et al move along the charging scan path and do not move in this way; No other marks are located on the film web so as to intersect with the straight line drawn between the marks of each set of marks indicating the length on the film web.

- In many applications where the graphics set occupies the entire width of the film web, such uncontinuous scan paths for optoelectronic sensors cannot be obtained without adding the width of the web, which in turn increases the width of the composite material. It has to be cut out from the web, which adds considerably to time and cost.

[Objects and effects of the present invention]

Therefore, a method and method for detecting scheduled marks in areas occluded by marks on a moving film web for monitoring film web distortion and providing other information about the moving film web. It is desirable to provide a device. Such a device is suitable for use in any application where the scheduled mark is located within the area occluded by the mark, such as in any application where recording or registering of a fixed mark on a moving film web-F is desired. May be used in the same manner.

(Summary of the Invention) The present invention provides a mark detection device that selectively detects a scheduled position detection mark on a moving web located in an area covered with marks, which includes a scheduled figure and a code detection mark located at a fixed distance relationship with respect to the position detection mark above a longitudinally extending mark detection path consisting of at least one longitudinally extending narrow detection actuation; a mark sensing device that receives the mark detection signal and detects the distance shape of the code detection mark and generates a mark detection signal indicative of the distance orientation of the mark in the longitudinally extending mark detection path; detecting a part of the mark detection signal corresponding to the mark detection signal and selecting a part of the mark detection signal based on the detection of the code detection mark and based on the distance relationship between the code detection mark and the position detection mark. comparing the selected signal portion with a first child reference set for further processing, detecting a portion of the selected signal portion corresponding to the position detection mark and recording the detection of the position detection mark; a mark detection device comprising a data processing device for comparison with a first predetermined set of criteria.

The present invention provides a method for detecting a scheduled position detection mark on a moving web located in an area covered with marks, in which the area is a scheduled position detection mark located at a predetermined distance relationship with a planned position detection mark shape. a detection mark shape, the method includes the step of: continuously monitoring a longitudinally extending code detection mark trajectory on the web that includes the predetermined code detection mark shape; The step of detecting the code detection figure by comparing the distance relationship between the detected marks with a planned model corresponding to the code detection mark figure includes selecting a short length portion of the position detection mark detection trajectory based on the detection of the code mark detection figure; monitoring the selected portion of the longitudinally extending position detection mark detection trajectory; A method comprising the step of detecting the position detection mark figure by comparing the position detection mark figure detected at a distance on the position detection mark detection trajectory with a planned model corresponding to the position detection mark figure. include.

The present invention provides a method for detecting a scheduled position detection mark graphic on a moving web located in an area covered with marks, wherein a part of the area has a scheduled code detection mark graphic, and the method includes: The code detection mark is detected by continuously detecting the passing of the mark in the code detection mark detection trajectory extending in the longitudinal direction with a monitor 5A that detects all the marks in the code detection mark detection trajectory. The step of detecting the code detection mark figure by comparing the mark figure in the trajectory with a first predetermined reference set corresponding to the code detection mark figure includes the step of detecting the mark figure in the longitudinally extending position detection mark trajectory. In the step of monitoring at scheduled intervals with a monitor device that senses marks on the position detection mark detection track, the marks in the position detection mark detection track detected within the scheduled intervals are detected at the position detection mark corresponding to the position detection mark. A method comprising the steps of: detecting the passage of the position detection mark by comparing two scheduled reference sets; and recording the passage of the position detection mark.

The present invention provides a method for moving J located within an area covered by marks.
A method for detecting a scheduled position detection mark graphic on a web, wherein a part of the area has a scheduled code detection mark graphic, and the method includes detecting a mark in a first detection trajectory extending in a longitudinal direction by detecting the code. generating a first detection signal indicative of each passage of a set of marks meeting said first set of predetermined criteria compared with a first set of predetermined criteria corresponding to features of the detection mark shape; comparing marks in the detection trajectory to a second set of predetermined criteria corresponding to features of the position detection mark geometry to generate a second detection signal indicative of each passage of a set of marks meeting the second set of predetermined criteria; The first detection signal is compared with the second detection signal to determine whether the code detection mark figure is indicated by the first detection signal or the position detection mark figure is indicated by the second detection signal within a predetermined interval. detecting the occurrence within the predetermined interval; recording the passage of the locator mark shape each time said signal comparison indicates the occurrence of the locator mark figure within the predetermined interval; including.

〔Example〕

One preferred embodiment of the invention, currently believed to be the best, is illustrated in FIG. Moving film web 1
0 for each section 11.13.0 of the same length in the longitudinal direction.・・・
・Several sets of graphics are repeatedly applied to each section 11, 13 . . . . is provided with a position detection mark figure located at the same relative position within. In the embodiment shown in FIG. 1, the position detection mark figure is a single widthwise extending mark 12, which has a dimension IIa'' measured in the longitudinal direction of the film web 10. For example, it may be 0.3175α (1/8 inch). Each compartment also includes a code detection mark graphic located at the same relative position within each compartment. In the embodiment illustrated in FIG. , the code detection mark figure is one mark 14 extending in the width direction, and this mark 14 is a mark 14 extending in the width direction.
The dimension of the planned value "b" measured in the longitudinal direction of, for example, 0.
It may be 15870 (1/16 inch). Marks 12 and 14 within each section are separated by a predetermined distance "C" measured in the longitudinal direction of film web 10. This planned distance "C11" may be, for example, 2.54α (1 inch).

Other position detection marks 18, such as display graphics,
Marks such as quality control graphics etc. are also marked in each section 11.
．． 13. . . . specific positions may be applied to unspecified positions.

The first mark-sensing device is a position-detecting mark photoelectric sensor 20 in the embodiment of FIG.
The relatively narrow width trajectory scanned by 0 means that in this fixed position the film web 10 is
Each section 11 is connected as you proceed in the displayed direction.
, 13°...intersects the upper position detection mark. 1st a
As shown in the figure, the position sensing photoelectric sensor 2o is a conventional photoelectric sensor having a leaking light source 28 located below the moving film web 10 and directing two narrow beams of light through the film web and onto the optical sensor 30. It may be. The light source 30 generates a signal based on the presence or absence of the light beam 29 due to the light beam 29 being periodically interrupted by printed marks on the film web 10 . In comparison with the film web speed signal, a time signal is thus generated which can be used to determine the exact position and longitudinal dimension of the mark passing through the light beam 29, i.e. the mark located along the position detection mark detection trajectory 22. . The film web speed signal can be obtained using a conventional encoder 32 or by Haak et al.
“roto-pulsor” of the type described in U.S. Patent Application Box 441,276 filed on May 2nd
The encoder 32 may be mounted in rolling contact with a roll 34 whose surface velocity is equal to the velocity of the film web 10. The encoder 32 velocity signal from the photoelectric sensor 20 and the time The signal is applied to a processing device such as a conventional microphone 0 processor 36 of the type described in U.S. Pat. It is an important requirement of the present invention that the position along the track 22 does not affect the accuracy or operation of the apparatus of the present invention.

The second mark sensing device according to the embodiment of FIG. All marks located along a longitudinally extending code detection mark detection trajectory 26 are sensed.

A code detection mark photoelectric sensor 24 is positioned to intersect each mark 14 on the moving film web 10 .

In this way, the two photoelectric sensors "20° 24 are connected to the position detection mark detection trajectory 22 and the code detection mark detection trajectory 29.
and a mark sensing device for sensing the spatial characteristics of a mark within a longitudinally extending mark path consisting of.

One method of using the apparatus of the invention shown in FIG. 1 to specifically register the passage of mark 12 is shown in FIG.

The position mark photoelectric sensor 20 continuously monitors the passage of all marks along the position mark detection trajectory 22 and obtains information regarding the longitudinal dimension of each sensed set of marks and the spacing between the sensed marks. is given as the position detection mark detection signal of the first set of signals. At the same time, the code detection mark photoelectric sensor 20 monitors the passage of all marks along the code detection mark detection trajectory 26 and provides information regarding the longitudinal dimension of each sensed set of marks and the spacing between the sensed marks. It is given as a code detection mark detection signal of the first set of signals.

The first set of signals comprising both mark indication signals is then compared to the respective predetermined numerical model. This predetermined numerical model must be a criterion for the position detection mark detection signal that the mark being inspected must have one longitudinal dimension within the predetermined 11M range; The dimensions may be smaller than 1.1a and larger than 0.9a. The standard for code detection mark detection signal is mark is 1.1b
It may be smaller than 0.9b and larger than 0.9b. By providing such tolerance, mark irregularities that may occur due to changes in mark printing conditions do not affect the accuracy of the apparatus of the present invention.

A second set of signals is provided in response to a comparison of each signal of the first set of signals with a respective numerical del. In the second set of signals, one signal of the set indicates the relative position of the mark figure that matches the register mark model, and the other signal indicates the relative position of the mark figure that matches the code mark model. Next, the second set of signals, ie the two mark detection signals, are compared. A part of the code detection mark detection signal indicating the appearance of the code detection mark and a part of the position detection mark detection signal indicating the appearance of the position detection mark occur within the scheduled time period, that is,
Physically speaking, if marks 12 and 14 are detected within a predetermined distance from each other, the relative positions of the detected position mark shapes are recorded or registered for further processing. Ru.

It can be seen from the example of one method in [i] above that three sets of criteria must be satisfied before the mark detected by the position detection mark photoelectric sensor 2o is recorded as a position detection mark.

1. The mark must meet certain predetermined criteria regarding the longitudinal positioning of the mark. (In the example above, the mark must have a longitudinal dimension within 10% of the value "aIT.") 2. The mark must be at a longitudinal distance of the intended length from the detected code detection mark.

3. Code detection marks must be verified to match specific scheduled characteristics. (In the previous example, the mark must have a dimension measured in the longitudinal direction that is greater than or equal to 10% of the value "bIT.") If the mark appears irregularly, it is highly unlikely that these three criteria will be met at the same time. Therefore, the syntactic probability that the device of the invention records only the correct mark 12 is extremely high.

Referring to FIG. 2, which illustrates another embodiment of the invention, in this embodiment the film web 40 is divided into sections 41, 43.・
..., and is provided with a position detection mark figure, which is a single mark 42 with a longitudinal direction measurement dimension 11a''.The film web 40 is also provided with a code detection mark figure 44, and this code detection mark figure is applied to the film web 40. The mark figure 44 is shown in Figures 2 and 3.
In the figure, the three bar-shaped parts of the letter “B IJ” are 45.47.4.
Consists of 9. The rod-shaped part has dimensions measured in the longitudinal direction, b, b3
are on the right, respectively, and are separated by longitudinal measurement distances d and d2, respectively. In FIGS. 2 and 3, the position detection mark figure 42 and the code detection mark figure 44 are positioned so as to intersect one narrow scanning trajectory 52 of the J photoelectric sensor Fj50, and the light ff1t=sensor 50 has the same structure as the photoelectric sensor 20 described with reference to FIG. 1a. The distance between the code detection mark figure and the position detection mark figure is "C" (
far away. The mark 48, which is irregularly located away from the area covered by the surrounding marks, is located along the trajectory 52 between the position detection mark figure 42 and the code detection mark figure 44. The position detection mark figure window 54 with the longitudinal direction measurement dimension "X" is enclosed in angle brackets in the longitudinal direction around the position detection mark figure 42, as will be described in detail later.The position detection mark window 54 is a code Distance from the upstream edge of the detection mark figure 44 ゛yIT
It starts from a distance. The distance between position detection mark graphic 42 and code detection mark graphic 44 is indicated by reference numeral 56.

The embodiment shown in FIG. 2 of the present invention continuously scans one detection trajectory 52 as shown in FIG. It operates by generating a mark detection signal containing information regarding the distance.

The mark detection signal is then compared to a numerical model of the code detection mark graphic 44. In this example, the numerical model consists of information including the longitudinal dimension of each set of sensed marks and the distance between the sensed marks. Therefore, the numerical model is, for example, ±10% of dl for the first distance.
The three marks must be detected separated by a distance equal to , and with respect to the second distance by a distance of ±d2, and furthermore, the dimensions of each of the three detected marks are 9b
-1,1b,,9b2-1.1b2. .

9b3-1.1 It must be the value of b3. After a mark shape that matches the code detection mark shape model is detected, all marks within the window 54 that are scheduled to be moved a predetermined distance "yII" in the F direction of the detected code detection mark shape are (f/ It is compared with a second numerical model corresponding to the ``r'' detection mark figure. In this case, the criterion is one of being within 10% of the longitudinal dimension (, ``a'').

If the sensed mark within window 54 matches this value, the sensed mark is registered for further processing.

In another embodiment of the invention illustrated in FIG. 4, a moving film web 70 is arranged in each section 71.degree. 73.75.
A series of position detection mark figures 72 are placed at scheduled positions within... Each position detection mark figure 72 has the position of an associated code detection mark 74 separated from the position detection mark figure in the longitudinal direction and the width direction. The position detection mark figure 72 may consist of two marks 72Δ, 72B, each position detection mark 72Δ, 72B being separated by a predetermined longitudinal distance and having a predetermined longitudinal dimension. Each code detection mark figure also has a predetermined longitudinal dimension, and two marks 74A and 74B are separated by a predetermined longitudinal distance.
It may consist of The position detection mark figure 72 is separated from the code detection mark figure 74 by a predetermined distance in the longitudinal direction. As will be described in more detail below, a position detection mark window 78 brackets the position detection mark 72 and is located a predetermined longitudinal distance away from the code detection mark graphic 74. The surrounding field mark 80 follows the code detection mark detection trajectory 84 formed on the code detection mark photoelectric sensor 82.
The position detection mark may be located within the position detection mark detection trajectory 89 formed by the position detection mark photoelectric sensor 86 . As shown in FIG. 7, which shows the operation of this embodiment, the order of operation to reach the register of the position detection mark figure 72 is as follows: code detection mark detection trajectory 84 31! It may also be possible to continuously monitor and generate a code detection mark detection signal.

Next, the code detection mark detection signal is compared with a model of the code detection mark shape based on, for example, the dimensions of the code detection marks 74A and 74B and the distance between them. As can be seen, the common signal is generated and the photoelectric sensor 8 is located at a predetermined longitudinal distance LJ tlA from the detection position of the code detection mark figure.
Activate 6.

A photoelectric sensor 86 provides a mark detection signal to monitor a predetermined short length of track 88 before becoming inactive. The detected marks are compared with a second numerical model having predetermined criteria based on characteristics of the position detection marks, such as number of marks, distance between marks, dimensions of the marks. If the mark detected by the photoelectric sensor 86 matches the second numerical model, the position where this mark appears is registered.

The inventive concept described above can be implemented in many different ways, and the claims are intended to include embodiments of the invention insofar as they are not limited by the prior art.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a mark detection device used to detect marks on a moving film web; FIG.
FIG. 2 is an exploded view of a portion of the mark detection device; FIG. 3 is a detailed view of a portion of the moving film web shown in FIG. 2; FIG. 4 is a detailed view of a portion of the moving film web shown in FIG. Embodiments: FIG. 5 is a flowchart of one method for operating a detection device for detecting a to-do mark in an area occluded by a mark; FIG. Flowchart of one method of operating the apparatus. FIG. 7 is a flowchart of one method of operating a detection apparatus for detecting a scheduled mark within an area occluded by the mark. 10... Film web, 11.13.・・・・・・
Longitudinal section, 12... Position detection mark, 14...
Code detection mark, 1B...Other marks, 20...
Position detection mark photoelectric sensor, 22... Position detection mark sensing device, 24... Code detection mark photoelectric sensor, 2
6... Code detection mark detection trajectory, 26... Light source,
29... Light beam, 30... Optical sensor, 32...
Encoder, 34...O-ru, 36...Microprocessor, 40...Film web, 42...Position detection mark, 44...Mark, 45.47.49...
・Bar-shaped part, 48...Other marks, 52...Detection trajectory, 54...Position detection mark figure window, 56...
- Distance between the position detection mark figure and the code detection mark figure, 70...Film web, 72...Position detection mark, 74A. 74B... Code detection mark figure, 82... Code detection mark photoelectric sensor, 88... Code detection mark detection trajectory, 86... Position detection mark photoelectric sensor, 98.
...Position detection mark detection trajectory. Applicant's representative Mr. Sato - Yu Drawing 7) Poa! Same content: No change) Procedural amendment form) February 22, 1986

Claims (1)

[Scope of Claims] 1. A mark detection device that selectively detects a scheduled position detection mark on a moving web located in an area covered with marks, comprising a scheduled position detection mark on the web that is located in a region covered with marks. a code detection mark in a fixed distance relationship with respect to the position detection mark; and at least one longitudinally extending narrow detection activation located along a longitudinally extending mark detection path. a mark sensing device configured to sense the distance shape of a mark and generate a mark detection signal indicative of the distance orientation of the mark in the longitudinally extending mark detection path; Detecting a corresponding portion of the mark detection signal and selecting a portion of the mark detection signal based on the detection of the code detection mark and further based on the distance relationship of the code detection mark to the position detection mark. comparing the selected signal portion with a first reference set for processing, detecting a portion of the selected signal portion corresponding to the position detection mark and recording the detection of the position detection mark; A mark detection device comprising: a data processing device for comparison with a first child set of standards; 2. The apparatus according to claim 1, wherein the mark detection signal is a time-based signal, and the apparatus monitors the speed of the moving web and generates a speed signal responsive to this speed. and applying this velocity signal to said information processing device such that the longitudinal distance between two preselected marks is determined from the data provided by said time-based mark detection signal and said web speed-based signal. A device computed by the data processing device. 3. In the apparatus according to any one of claims 1 and 2, the first set of predetermined criteria for selecting and further processing a portion of the mark detection signal includes: (a) detection; (b) the distance measured in the longitudinal direction between the detected marks; or (c) the distance measured in the longitudinal direction between the detected marks.
A device comprising a number of marks detected within a predetermined longitudinal distance on at least one mark detection trajectory. 4. The apparatus according to any one of claims 1 and 2, wherein the second set of predetermined criteria for selecting and further processing a portion of the mark detection signal includes: (a) detection; (b) the distance measured in the longitudinal direction between the detected marks; or (c) the distance measured in the longitudinal direction between the detected marks.
A device comprising a number of marks detected within a predetermined longitudinal distance on said at least one mark detection trajectory. 5. The apparatus according to claim 1 or 2, wherein the mark sensing device comprises one photoelectric sensing device that detects marks within one mark detection trajectory. 6. The apparatus according to claim 1 or 2, wherein the mark sensing device detects a mark within a first detection trajectory that includes the expected position detection mark, and generates a first mark detection signal. a first photoelectric sensing device that generates a second mark detection signal; and a second photoelectric sensing device that detects a mark within a second detection trajectory that does not include the scheduled position detection mark and generates a second mark detection signal, The mark detection signal includes the first detection signal and the second detection signal. 7. In a method for detecting a scheduled position detection mark on a moving web located in an area covered by marks, the area includes a scheduled code detection mark located at a predetermined distance relationship from the planned position detection mark shape. continuously monitoring a longitudinally extending code detection mark trajectory on the web that includes the predetermined code detection mark geometry; detecting the code detection figure by comparing the distance relationship between the marks with a predetermined model corresponding to the code detection mark figure; and detecting a position extending in the longitudinal direction on the web, including the position detection mark figure. selecting a short length portion of the mark detection trajectory based on the detection of the code mark detection figure; monitoring the selected portion of the longitudinally extending position detection mark detection trajectory; and detecting the position. A method comprising the step of detecting the position detection mark figure by comparing the position detection mark figure detected at a distance on the mark detection trajectory with a planned model corresponding to the position detection mark figure. 8. The method according to claim 7, wherein the step of continuously monitoring the mark detection trajectory extending in the longitudinal direction comprises monitoring one narrow trajectory. 9. In the method according to any one of claims 7 and 8, the step of comparing the distance relationship between the detected mark and the planned model includes: (a) the longitudinal dimension of the detected mark; or (b) comparing the longitudinal distance between the detected marks with a predetermined value. 10. A method for detecting a scheduled position detection mark figure on a moving web located in an area covered with marks, wherein a part of the area has a scheduled code detection mark figure, and the method includes: a step of continuously monitoring the passage of marks in a code detection mark detection trajectory extending over the code detection mark detection trajectory with a monitor device that senses all marks in the code detection detection mark detection trajectory; detecting the code detection mark shape by comparing the code detection mark shape with a first predetermined reference set corresponding to the code detection mark shape; a second scheduled reference set corresponding to the position detection marks, and a step of monitoring the marks in the position detection mark detection trajectory detected within the predetermined intervals with a monitor device that detects all the marks in the position detection mark at scheduled intervals; A method comprising the steps of: detecting passage of the position detection mark by comparison; and recording passage of the position detection mark. 11. A method for detecting a scheduled position detection mark figure on a moving web located in an area covered with marks, wherein a part of the area has a scheduled code detection mark figure, and the method includes: a first detection signal that compares a mark in a first detection trajectory extending over a first detection trajectory with a first predetermined reference set corresponding to a feature of the code detection mark shape and indicates passage of each mark set that matches the first predetermined reference set; and comparing marks in a second detection trajectory extending in the longitudinal direction with a second predetermined reference set corresponding to the characteristics of the position detection mark shape to determine a mark set that matches the second predetermined reference set. generating a second detection signal indicating each passage; and comparing the first detection signal with the second detection signal to indicate the code detection mark shape by the first detection signal within a predetermined interval. Detecting the occurrence of the position detection mark figure within a predetermined interval with the indication of the position detection mark figure by the second detection signal;
recording the passage of a locator mark shape each time said signal comparison indicates the occurrence of a locator mark figure within said predetermined interval of a code detect mark figure.