CN1050325C

CN1050325C - Method and system for determining end of cloth roll for use in blanket cleaners for printing press

Info

Publication number: CN1050325C
Application number: CN92105106A
Authority: CN
Inventors: 查尔斯·罗伯特·格斯帕里尼; 沃尔特·H·卡诺
Original assignee: Baldwin Graphic Systems Inc
Current assignee: Baldwin Graphic Systems Inc
Priority date: 1991-08-30
Filing date: 1992-06-26
Publication date: 2000-03-15
Anticipated expiration: 2007-06-26
Also published as: JPH05212856A; CN1072135A; DE69209937D1; EP0529764B1; EP0529764A1; DE69209937T2

Abstract

Method for determining the end of a cleaning cloth (which is non-metallic and non-magnetic) for cleaning the blanket cylinder of a lithographic press and device therefor, wherein the cloth has indicia positioned at a predetermined distance from the end of the roll of cloth which are arranged to pass a sensor mounted to sense the indicia as the cloth is fed for cleaning the roll. An alarm signal (which may be audible or visible) is given to alert the press operator when either end of the indica is detected.

Description

Be used for determining the method and system of yardage roll end at printer sleeve cleaner

The present invention relates to improvement to printer sleeve clean technologies.More particularly, the present invention relates to a kind of method and system, it can alternate application in the Clean-yardage roll of typographical printing mantle tube apart from the primary importance of its terminal preset distance and the second place of next-door neighbour's yardage roll end.

Well-known in printing industry, the sleeve of typographical printing machine must clean at any time, and its reason is many-sided, for example what happens when the one-step print end of job.Therefore, known in this technology have several different methods and means to realize this result, comprises the automatic cleaning apparatus that utilizes cleaning cloth, US Patent 4 as approval on August 7 nineteen eighty-two, 344, No. 361, be entitled as from moving sleeve cleaner (Autonaric Blanket Cylinder Clean-er).As shown in this patent, in this cleaner, there are a cleaning cloth supply spool and a cleaning cloth to receive spool.As 4,344, illustrate in No. 361 patents like that, there is a propelling unit there, it is pushed to the reception spool to cleaning cloth from supply spool.People it is desirable for this propelling unit most can push the cleaning cloth of same length basically at every turn, and regardless of on the supply spool or the cloth coil diameter that retains on the reception spool much.

According to the structure of describing in the described patent from the moving sleeve cleaner system, use a dilatable balloon mechanism periodically to force cleaning cloth to contact with sleeve, clean sleeve with spilling to combine to the water of cleaning cloth and/or solvent.

Become the commercial product of a success in following period of time from the moving sleeve cleaner described in the aforementioned patent.This commercial product is used in combination with a kind of switching device, this switching device to operator indication when the cleaning cloth on the cleaning cloth supply spool approach to use up and when the cleaning cloth supply spool has been used empty.For this purpose, from moving sleeve cleaner and the coupling of a qualification switch, this limit that switch is determined or perception cleaning cloth supply spool on the cloth coil diameter and the length of deducibility cleaning cloth thus.Like this, residue cloth coil diameter on the spool determined to have provided an estimated valve of residue cleaning cloth length on the spool, switch or sensor and a combined signal job, this signal can be in sight and/or be heard, so as notification operator when cleaning cloth to approach supply spool terminal and when cleaning cloth is supplied with to exhaust.The warning of the above-mentioned type successfully is applied, and is although it also has some limitation, high not enough as the precision of this system.

A problem of perception diameter type warning is that the lineal measure of residue cleaning cloth is inferred on yardage roll.Rather than directly measure or determine.Though calculate the lineal measure of residue cloth, it can not accurately be determined, is stranded for not measuring diameter itself with the needed precision of length of fully accurately measuring cloth with utilizing digital coarse.Have, the precision of carrying out diameter measurement is subjected to the restriction of following situation again: many other dimensional variation that the precision of transmission shaft patchhole changes and occurs when the parts of making cleaning cloth supply and receiving mechanism and element on the variation of carboard core diameter, the support.Owing to these reasons, use some mechanisms to infer on the supply spool that the length of residue cloth is coarse, its error can reach 1 yard (yard) even bigger.In very responsive printing circle of competitive price, 1 yard cleaning cloth also is very showy.

Usually, a cleaning cloth supply spool can have 12 yards left and right sides cleaning cloths, and it can be used for about 250 cleanings of web press, or is used for about 125 cleanings of sheet-fed paper feeding printer (sheetfeed press).Because the difference of environment, the operator had 8-15 cleaning at 8 hours in one class.Like this, according to ambient conditions, only need about 2 inches cloth to finish a sleeve and clean.Therefore, 3 feet cloth can be used in quite repeatedly cleaning for different environment.One of purpose of the present invention is to utilize cloth to go to carry out cleaning as much as possible, and avoids the waste of cleaning cloth.

Utilize inference system to determine the unclear waste that really can cause cleaning cloth of the caused possibility of residue cleaning cloth length, but also the situation that may not have cleaning cloth to contact with sleeve, this situation can cause the serious scratch of sleeve.Like this, when the balloon-type system normally forces cleaning cloth to contact with sleeve system, if the cleaning cloth supply length is determined inaccuracy, thereby inflatable ball rather than cleaning cloth being contacted with sleeve, is possible cause serious scratch to damage sleeve just open.

For noun used herein " cloth ", the reader will be understood that it can be defined as patent 4,344, described in No. 361 like that, also can be the fabric that is suitable for cleaning sleeve, cloth or the paper material of certain other types.

Existing a plurality of prior art patents, their relate generally tos determine to launch in the heart from wireline reel the end of certain next material.

Material in the equipment that the patent of Berquist relates to for 3,449, No. 733 on the axle is magnetic or magnetizable.Information (being similar to taper recorder) on header record record processed material.A sensing head (sensing head) utilizes this information to determine the terminal of spool and controls the other machines function.

People's such as Jelling patent relates to a kind of automatic bagging equipment for 3,991, No. 625, and it utilizes the eyelet of accomplishing fluently in advance on the plastics reel to indicate the end of bag.The sensing process is to realize by the spring pin that is suitable for inserting in the eyelet.This patent is also mentioned the material that uses other types, and as opaque point or line, they realize the sensing process with photovoltaic or capacitive way.

The patent of Betts discloses a kind of strip of conductive material 3,146, No. 431, and just the tear strip that uses on the cigarette case (tear strip) is used for the end of reel with it.Control the expansion reel by a sensor, this sensor has two conduction brush, has just constituted a complete circuit when what that strip of conductive material contacted with this two conduction brush.Come to indicate the end of reel with it to the machine operator.

The patent of Hannah discloses for 3,184, No. 177, uses hole or dim spot or bright point accurately to determine (film) frame on the film band.Two photoemissive elements come the position of perception frame.

No. 3,542,304, the patent of Hudson discloses, and comes perception to embed the metal particle of textile in rolling up with two conduction beaming rollers.So just, can before damaging fabric, these metal particles get rid of them.

No. 3,568,584, the patent of Harvey discloses, a kind of camera automatic coiling of tape mechanism by can put and film on conductive material come the position of perception film.The use of conductive material is that the space that occurs rule in the conductive material is interrupted, then this interruption of perception.This patent also is disclosed in and uses eyelet on the film, and they come perception by the spring pin of operation electric contact.

No. 4,115,013, the patent of Hedstrom discloses, and a kind of photoelectric detector is used for the end of perception printer color tape.On colour band, post reflex-reflective material.

The patent 4,212,552 of Bemis etc. discloses, and uses conductive material on printer color tape.When colour band when spool launches, two contacts folders contact with colour band.Conductive material on colour band contacts this two contacts, just constitutes a complete circuit.So just provide a colour band tail signal to chopping machine.

The patent of Garwood etc. discloses for 2,821, No. 284, goes up at manifolding paper roll (carbon pa-per web) and pastes a conduction band or conductive foil, and come perception by two conduction beaming rollers.When conductive foil passed through between these two beaming rollers, an electric signal was used to start a warning device.

Consider above-mentioned situation, a target of the present invention provides a kind of new improved system, is used for the sleeve cleaning of typographical printing machine.

Another target of the present invention provides the new improved cleaning sleeve cartridge system that a kind of energy determines to supply with the cloth terminal.

Another target of the present invention is for the sleeve cleaning systems provides a kind of cleaning cloth, has indicatory device on cloth, and the perception means of this indication of perception also are provided, in order to provide the information about cleaning cloth to the operator.

Another target of the present invention provides a method, will arrive in order to supply with the cloth terminal point to the press operator warning.Its practice is that a target indication is provided on cloth, thereby it can the perceived operator of informing remain the cloth length for being scheduled to, and alarm operation person is about to reach supply cloth terminal point.

Another target of the present invention provides a mark, its sensor senses of appropriate location on the cloth that can be cleaned, thus can indicate the end of supplying with cloth in the Cleaning period at sleeve.

Another target of the present invention is to provide a mark at least on the terminal preset distance of distance sleeve cleaning cloth, can determine when that by these mark sensing means cleaning cloth is near it is terminal and when cleaning cycle should stop.

The present invention also has a target, and a method for sensing combination promptly is provided, and it is specially adapted to typographical printing machine environment, is applicable to the perception cleaning cloth end in supply cycle.

Description hereinafter will be pointed out other targets of the present invention and advantage, will make these targets and advantage partly become obvious by these descriptions.Instrument, parts, method, equipment and the process of specifically noting in additional claim will make described target and advantage accomplished.

Here the concise and to the point invention of describing is relevant with clean metal printing machine sleeve, its formation is: select a mark, use and/or be connected on nonmetallic, the nonmagnetic textile class cleaning cloth material, this is marked at can be by another parts and/or the perception of institute of mechanism under the suitable environment.This mark is placed on predetermined position on the cleaning cloth, and determines its placement direction according to the information that will seek.The present invention includes location and perception and be selected in mark on the appropriate location, its objective is that alarm operation person is about to arrive to supply with the cloth terminal and/or at the actual cleaning cycle that stops of supply cloth terminal.

This mark can be magnetic or nonmagnetic metal (as aluminium foil, mercury etc.) and/or magnetic material, is placed on non-metal, the non magnetic cleaning cloth (as paper) in any mode easily.Mark can be the form of lacquer bar, blackstreak for example, and vertical or horizontal being placed on the cloth, and one or more these class marks can be arranged.This mark can with adhesive tape, braiding, japanning or any other easily mode place on the cloth.

According to type, provide suitable perception means existing with perceptible markings attached to the mark on the Clean-fabric.These sensing means can be certain type that metal, non-magnetic material, magnetic field, electric capacity, light etc. are responded, and it does not require just start sensor of contact between sensor and mark.

The present invention also can utilize the photovoltaic principals of visible light and/or infrared light.In this case, the present invention can utilize retroeflection (retrireflective) sensing, scattering infra-ray sensing, scatter visible light sensing and fixed-focus sensing.The luminance level of the luminance level of this substantive requirements of form mark of the present invention (light level) and cloth has enough big difference, like this variation that sensor just can the light quantity that perception received.This form of the present invention can be utilized visible or infrared light.

The present invention is made of diagram and the new parts of describing, step, structure, configuration and improvement institute.

The accompanying drawing that constitutes the part of this explanation and be included in here will illustrate one embodiment of the present of invention, and description is used for explaining principle of the present invention together with text.

Fig. 1 can use the transparent view of that class of the present invention from the moving sleeve cleaner.

Fig. 2 is along the line vertical section that 2-2 gets among Fig. 1, and demonstrating does not have gas filed soft shell (bladder), and cleaning cloth and sleeve also demonstrate the sensing means of placing according to the present invention at a distance of certain distance.

Fig. 3 is and the similar section-drawing of Fig. 2, demonstrates gas filed soft shell, and cleaning cloth is contacted with sleeve.

Fig. 4 is a scheme drawing, and the relation between mark and the sensor section is described.

Fig. 5 demonstrates a plurality of these marks that separate of level on fabric, this is a kind of form of the present invention.

Fig. 5 A is another sketch map, demonstrates a group echo.

Fig. 6 demonstrates the mark of placing along the fabric length direction.

Fig. 7 is the transparent view of yardage roll, has the aluminum strip indicatory device, and this is a kind of form of the present invention.

Fig. 8 is a fragment figure, and part provides section, demonstrates coil pickup.

Fig. 9 is a sketch map, demonstrates the relation between the yardage roll of coil pickup and tape label.

Its winding diagram of Figure 10 illustrative.

Figure 11 provides the yardage roll of the another kind of form of the present invention, has black streaking and serve as a mark on fabric warrping.

Figure 12 is the part fragment figure, demonstrates the installation of another kind of form sensing means.

Sketch map among Figure 13 demonstrates opto-electronic pickup and has relation between the yardage roll of mark.

Figure 14 is the photoelectric sensor circuit sketch map.

With reference to figure 1-3, demonstrate here and can use environment of the present invention.This three width of cloth figure can with US Patent 4,344, the Fig. 1-3 in 361 compares.Should be appreciated that the present invention is not limited to be applied in the sort of specific sleeve cleaner structure relation, is casehistory here.

As Figure 1-3, have 2, one cloth of a sleeve to receive spool 4 and cloth supply spool 6 here, they suitably are installed on the fixing side stand 8.Cleaning cloth C is delivered to from cloth supply spool 6 to be moved on the cloth reception spool 4 in other words, and the purpose of cloth C is a cleaning sleeve 2.For this purpose, demonstrate inflatable soft shell parts 38 among the figure, it can be inflated expands and contact cloth C, and then described by any mechanism easily (as US Patent 4,344,361) by the predetermined way of selecting) cloth C is contacted with sleeve.Should be appreciated that fabric contact means are not limited to inflatable soft shell device.

Cleaning cloth C should absorb water and solvent equably, and basically as US Patent 4,344, as described in 361.Cloth is preferably nonmetallic and nonmagnetic, and be suitable for last or or the inside place mark, this mark can be small pieces metal, non magnetic and/or magnetic material or japanning, can take any form easily or sheet.

With reference to figure 4, schematically provide sensing means S among the figure, the position of putting makes sensor S can perception be positioned at mark on the clean textile C.Sensor can be the type of hereinafter describing, and it does not require contact, but can react to metal, non-magnetic material, magnetic field or electric capacity, and all these is a prior art.

The scheme drawing of Fig. 4 provides yardage roll 4, has indicia means on cloth C, and its specific embodiment will be described below, and also demonstrates the sensor that is suitable for this indicia means of perception among the figure, and they are placed on the holding components.

With reference to figure 5, it demonstrate the not end of the type of describing cleaning yardage roll, on the position of not holding preset distance on the cloth apart from it underlined 20.This mark can be one section tape, metal, nonmagnetic and/or magnetic recording tape, perhaps metallic paint, and its existence can be by the perception of commercially availabie sensor institute, for example inductance, electric capacity, sensor electromagnetism, photoelectricity etc.

For example, the mark on the cloth can be form metallo-, nonferromagnetic and that have metal tape, the nonferromagnetic band, and different electrocoating paint, metallic paint, or other can place or be attached at metal object on the woven in any mode easily.In other embodiments, this mark can be black or other dark-coloured coating.

For example, this mark can be bonded on the fabric, can with the band line (tape threads), the braiding or any other easily mode mark is attached on the fabric.

Shown in Fig. 5 A,, on cloth, one or more marks can be arranged according to the desired procedure sequence.For example, first target label 22 is arranged, it be used for alarm operation person's cloth do not hold near, second target label 26, it informs that operator's cloth supplies with volume and arrive and hold, cleaning cycle must finish to avoid scratch.

For convenient meter, shown in Fig. 5 A, be equipped with one group of target label in each pre-determined bit.This is a kind of form of the present invention, and it requires the operator to know the definite position of target label on cloth.If desired, also can use the single target mark to each desired location, if know this mark can with the sensing device aligning.

In the present technique field known, can obtain appreciiable signal that maybe can listen or that both have concurrently as required.

Target label can be placed on the cloth and not hold on the position of first preset distance and second preset distance apart from cloth.First preset distance can be decided to be the required cloth length of each cleaning and multiply by that the operator is desirable spontaneously to be gone out to warn to the wash number of finishing between cleaning cloth is not held.Second preset distance can be the needed a certain distance of operator, has sufficient time to stop washing and cleaning operation to prevent may injure sleeve in order to guarantee the operator.

With reference to figure 6, it demonstrates another kind of form of the present invention.Use mono-target label band in this form of the present invention, it extends along the length direction of cleaning cloth.

As shown in the Examples, target label 24 has a leading end 28 and tail end 30.In this embodiment, the leading end 28 of target label in first desired location, is used to send cleaning cloth and begins end signal, and tail end 30 is used to send cleaning cloth physical end signal.With what estimate is when leading end during by sensing means (can be sensing means of the same type as shown in Figure 5) perception.Promptly start warning signal, and when tail end 30 during by sensor senses this warning signal stop.

The benefit that obtains is, utilizes the present invention, and the first target label notification operator is being supplied with on the yardage roll the only cleaning cloth of remaining predetermined length.For example, can realize this point by the impulse source that hides sleeve.This makes the operator can know only remaining a certain amount of cleaning cloth, thereby makes him can plan the work of his this class.On the other hand, utilize second target label, when cleaning cloth reaches it and do not hold, will send another warning signal, thereby make the operator not allow sleeve enter cleaning cycle, so as not to causing damage such as sleeve scratch.

As noted, target label can be metallo-, nonferromagnetic, electrically-conducting paint and/or metallo-or nonmetallic dark-coloured coating.When using metal marker, it can use the available microswitch in any market easily (micro switch), for example the PK87592 that can buy from Honeywell division.This microswitch can be a Proximity Sensor, is started by the ferromagnetic metal of suitable thickness, even can be that 0.0005 to 0.002 inch non-ferromagnetic metal paper tinsel starts by thickness.Utilize this Proximity Sensor, it does not need actual contact, and its detects the target of motion and does not need between sensor and the target 4 contacting or magnetic attraction physically.

Utilize this target and sensor, generate an electromagnetic field by a coil on the sensor front.When absorbing this electromagnetic field, target-marking just produced eddy current.This vibration to sensor provides a reverse load, thereby has reduced its signal level.This variation of signal level is amplified by integrating circuit, is used to drive this schmitt trigger.This flop signal and an output transistor coupling, this transistor provides a digital quantity output.

Provide a kind of magnetic mark or target in another form of the present invention, it needs the sensor of an outer reaction magnetic force.For this purpose, can on market, buy the 400SR sensor that Honey-well Division produces.This is the solid-state hall-effect sensor of a low price, and it carries out magnetic operator by 6 to 16 volts of DC supply.

There is the mark of multiple other types can consider in solid line of the present invention, to adopt.Comprising:

Magnetic ink.Magnetic ink is magnetized, and shows lower magnetic flow at short notice.They are used for (light offset and water press) form, and before use must heating.

Conductive ink.These inks have high-ohmic resistance, but if contact with water and/or humidity, its electric conductivity can be removed, and ink also can disappear.

Electrically-conducting paint.These coating have high conductive characteristic and cost-effective.Yet, but because they lack high ferrous components, coil pickup can not detect these electrically-conducting paints.In addition, this coating needs air/heat drying when using.

Electrically conductive graphite impedance coating.This material has high conductive characteristic, is gel, and must dilute in deionized water and concoct.

Capacitive transducer.Be furnished with very low specific inductance capacity, detection difficult.

Electric capacity low coverage sensor.In this case, with sensor senses dielectric material, metal, conductive material, rubber, glass, its sensing depends on specific inductance capacity.It is big that these sensors generally tend to volume, and distance sensing depends on the size of sensing head.

Inductance type low coverage sensor.Like this, provide among Fig. 7-10 and be used to illustrate an inductance type low coverage sensor type most preferred embodiment of the present invention.

Fig. 7 provides the yardage roll that has the inductive type mark.

As known in the present technique field, the inductive type sensor function as shown in figure 10.

Figure 10 demonstrates in schematic form, and inductance type low coverage sensor 29 is made up of coil 30 and ferrimagnetism unshakable in one's determination 32, also has an oscillator 34 and detector 36, and solid-state output 38.The function of oscillator 32 is to set up a radio-frequency field of penetrating from the sensor front width of cloth, and it is the center with the axis of coil 30.Ferro-magnetic core limits its electromagnetic field and makes it directed forward.

Sensor 29 is positioned within the aperture 35 (Fig. 8-9), places among the bracket component 37 in any mode easily.As shown in Figure 9, the position of sensor makes it detect alarm strip note 22 and strip mark is not held or target 24.

This mark is aluminium foil (31) preferably, but it also can be corrosion-resistant steel, mercury, lead, brass or copper.In operational process, the mark on fabric enters radio-frequency field, just generates eddy current in labeled surface, and this makes expended energy in the pierce circuit, and amplitude of oscillation is reduced.This variation of amplitude just produces a signal, leaves sensing unit until mark, and sensor recovers its normal condition.

As has been noted, preferred marker material is that thickness is the aluminium foil about 0.002 inch.Be about 0.250 inch apart from maximum between aluminium foil and the sensor, in 0.250 inch scope of maximum distance sensing, can accurately detect.For obtaining the failure-free result, wish that cleaning cloth keeps tension.This form of the present invention can not be subjected to the influence of air dust-laden or other pollutions conversely.

Another kind of form of the present invention relates to the photoelectric sensing principle, and the luminous energy here passes the space with concentrated form, promptly propagates with the photon form.Photon strikes in application, be referred to as mark the surface, discharge photoelectron.Photoelectronic energy can produce electric current in the mode that people on the technology understand.This electric current can be used for starting light or other visible or audible alarm systems.

In general, any opto-electronic pickup optical system can be used as one of three kinds of basic sensing modes that can use visible or infrared light.These three kinds of modes can classify as: relative, back reflective or in-plant.Photoelectricity low coverage mode can be divided into subclass again again: scattering low coverage, angular-spread beam (divergent-beam) low coverage, convergent beams (convergent-beam) low coverage, and background suspension (background suspension) low coverage.

The back reflective sensing.In this form, mark is the reflection rake on the yardage roll, and detector detects the reflecting surface on the band (lape).The reflecrtive mark target is along identical optical axis reflected light.For minimum requirements, wish that reflective distance is no more than 0.6 inch.

The scattered infrared light sensing.Our most preferred embodiment of the present invention of explanation among Figure 11-14, its uses scattering infra-ray sensing mode, the flat bar 40 that is coated with of the black on the sensor yardage roll here.This black stripe width in about 1/2 to 1 inch scope, preferably 1 inch wide.In application, infrared light is mapped to labeled surface, and quilt is surperficial to all scattered through angles, and its sub-fraction light reflects along same optical axis.Distance sensing in most preferred embodiment is about 0.80 inch.

Depend on the density of band with respect to the ability of light tone fabric background detection black stripe.In order accurately to detect, band should be comparatively fine and close, because need bigger contrast could realize gratifying detection in the air environment of being polluted by dust and chip etc.Preferably the density value that records by the standard density metering system is for being about 1.14.Density measuring scope on density measuring instrument preferably 0.9 to 1.5.

Figure 11 provides the perspective sketch map of the coating black stripe 40 on the yardage roll.2 such bands are arranged among Figure 13.Provide the relative position of sensor and yardage roll and mark among Figure 13.

In a most preferred embodiment, utilized Banner EngineeringCorp.of Minneapolis, the low section scattering low coverage sensor of the No.05-Q08-AN7-V11131 type that MN produces.Under proper handling mode (change dark (dark on) operating mode), when since secretly mark make sensor can not use its reflex time of light modulated on cloth on the path, sensor is in conducting state.

Provide the low section infrared pickoff scattering low coverage sensor of BannerQ08 series sensor among Figure 12-13, have metal case, be contained on the framework 46 with screw part 48, its residing aperture as shown is the contiguous L type holding components of supplying with yardage roll.As shown in figure 13, supply with the secret note band that yardage roll has 2 the above-mentioned types, one of them is the alarm band, and another is the terminal band of cloth.

Such as will be understood, when the secret note band was in the sensing scope, sensor was activated sounding and/or shows suitable alarm signal.

With reference to Figure 14, demonstrate traditional photoconductive structure that can produce signal and/or alarm among the figure.Like this, cloth fabric C has a mark, for example is coated with secret note band 22 in the above.Supply light with any light source easily, and placement photodetector 50 receives reflected light.Shown in dotted line, the equation of light (difference in light) produces an electric signal, and it is sent to the comparator 52 that has with reference to thresholding, thereby starts the alarm of arbitrary form, the alarm that maybe can listen as can be seen.

The scatter visible light sensing.Another embodiment of the present invention is utilized the scatter visible light sensing, uses the blacking band on the sensor yardage roll here.

In this case, use the identical physical structure of Figure 11-14, with radiation of visible light blacking surface.To all angles, wherein sub-fraction light reflects along optical axis light by surface scattering.In this case, if do not have dust or chip on the lens, then distance sensing is 0.6 to 0.8 inch, if dust or chip are arranged on lens, then distance sensing is about 0.5 inch.Even the not fine and close secret note that also can detect on the yardage roll of secret note band, because the contrast resolution between the black and white is very high, sensor can be distinguished deep or light coating band.In this case, strip width is between 1/4 to 1 inch.

The fixed-focus sensing.In this embodiment, a fixed-focus beam spot sensor is arranged, it is last that its light beam and sensing unit focus on the fixing distance in sensing controler front.Like this, concentration of energy is spent with clear with increased reliability in a zone.The color contrast height, sensor can be distinguished deep or light coating band.This form is used visible light and is not used infrared light.

Claims

1. method that definite cleaning cloth fabric is not held, be used for the cleaning of typographical printing mantle tube, the cleaning cloth here is pushed to cloth from the cloth supply spool and receives spool, and this cleaning cloth fabric is suitable for and the sleeve between cloth reception spool and cloth supply spool contacts, and this method comprises:

(a) provide a kind of nonmetallic nonmagnetic fabric cloth, it can absorb water and solvent;

(b) provide at least one target label on described fabric, its type is can be by sensor senses, and described target label is positioned on the described cleaning cloth at least one desired location;

(c) provide the sensing means that described target label is reacted, when described sensor is reacted to described target label, can send signal, thereby when the described target label of described sensor response on the desired location, just produce a signal.

2. as a kind of method of claim 1 definition, target label described here is positioned on second preset distance that clean textile is not held on first preset distance and next-door neighbour's cleaning cloth is not held; Like this, sensor senses is positioned at apart from described cleaning cloth does not hold the target label at the first preset distance place, and it is logical as cleaning cloth afterbody as described in beginning to enter to send signal, and the second preset distance place of not holding at next-door neighbour's cleaning cloth sends signal once more.

3. as the defined a kind of method of claim 2, first preset distance described here is to be determined by the length of the predetermined required cloth of wash number.

4. as the defined a kind of method of claim 3, second preset distance here is close to the not end of cloth.

5. as the defined a kind of method of claim 3, it has a plurality of target labels.

6. as a kind of method of claim 5 definition, it has a ribbon target label.

7. as a kind of method of claim 6 definition, the target label here is a metallic material.

8. as a kind of method of claim 7 definition, the target label here is a metallic paint.

9. as a kind of method of claim 8 definition, the target label is here made by magnetic material.

10. as a kind of method of claim 9 definition, the target label is here made by magnetic coating.

11. as a kind of method of claim 2 definition, the mark is here made by nonferromugnetic material.

12. as a kind of method of claim 2 definition, the mark is here made by electrically-conducting paint.

13. as a kind of method of claim 2 definition, the mark here is the black stripe on the cloth.

14. overcoat cleaning device that definite cleaning cloth fabric is not held, be used for the cleaning of metal sheet printer sleeve, the cleaning cloth here is pushed to cloth from the cloth supply spool and receives spool, and the clean cloth fabric of this feelings is suitable for and the sleeve between cloth reception spool and cloth supply spool contacts, cleaning cloth that this device is adorned is that non-metal is rolled over nonmagnetic fabric cloth, can absorb water and solvent, this device comprises:

(a) have at least an indicia means to be positioned on the described fabric, it can be by the perception of sensing means;

(b) sensor means, its position of putting can make it when cloth receives spool reception yardage roll described indicia means be reacted;

(c) described sensor means responds described target label, and can send signal when the described target label of response, thereby just produces a signal when described sensor response is in the described target label in desired location.

15. as the defined a kind of device of claim 14, target label described here is positioned on the clean textile not to be held on second preset distance of not holding with next-door neighbour's cleaning cloth on first preset distance apart from clean textile; Like this, sensor senses is positioned at apart from described cleaning cloth and does not hold the target label at the first preset distance place; And sending the described cleaning cloth afterbody of signal announcement having begun to enter, the second preset distance place of not holding at next-door neighbour's cleaning cloth sends signal once more.

16. as defined kind of device of claim 15, described target label first preset distance is determined by the required cloth length of predetermined wash number.

17. as the defined a kind of device of claim 16, the not end of described second preset distance next-door neighbour cloth.

18. as the defined a kind of device of claim 17, it has one group of target label.

19. as the defined a kind of device of claim 18, it has a ribbon target label.

20. as the defined a kind of device of claim 18, its target label is a metallic material.

21. as the defined a kind of device of claim 20, the target label here is a metallic paint.

22. as the defined a kind of device of claim 21, the target label is here made by magnetic material.

23. as the defined a kind of device of claim 22, the target label is here made by magnetic coating.

24. as the defined a kind of device of claim 15, the mark is here made by nonferromugnetic material.

25. as the defined a kind of device of claim 15, the mark is here made by electrically-conducting paint.

26. as the defined a kind of device of claim 15, the mark here is the colored band on the cloth.

27. have a kind of sleeve clean-up device that cleaning cloth receives spool, its composition is:

(a) nonmetallic, nonmagnetic cleaning cloth;

(b) pre-determined bit on cloth is equipped with at least one mark, and its color is significantly different with the cleaning cloth fabric color;

(c) a scattered infrared light sensing device is arranged on the sleeve clean-up device, its position makes the mark on its energy perception fabric;

(d) and send signal means, when described sensor senses between fabric and the mark difference and just send signal when causing an electric current.

28. as the defined device of claim 27, mark described here is the blacking band, described sensor is the scattering infrared pickoff.

29. as the defined device of claim 27, mark described here is a blacking, described sensor is the scatter visible light sensing type.

30. have a kind of sleeve washing equipment that cleaning cloth receives spool, its composition is:

(a) nonmetallic, nonmagnetic cleaning cloth;

(b) at least one mark in desired location on cloth, it has significantly different color with the cleaning cloth fabric;

(c) photoelectric sensing apparatus is arranged on the sleeve clean-up device, its position makes the mark on its energy perception fabric;

(d) and signaling device, just send signal when the difference between sensor device perception fabric and the mark and when producing an electric current.