EP0529764B1 - Procédé et système pour déterminer la fin d'un rouleau de matière textile destiné à être utilisé dans un dispositif de nettoyage du blanchet dans une presse - Google Patents

Procédé et système pour déterminer la fin d'un rouleau de matière textile destiné à être utilisé dans un dispositif de nettoyage du blanchet dans une presse Download PDF

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Publication number
EP0529764B1
EP0529764B1 EP19920304298 EP92304298A EP0529764B1 EP 0529764 B1 EP0529764 B1 EP 0529764B1 EP 19920304298 EP19920304298 EP 19920304298 EP 92304298 A EP92304298 A EP 92304298A EP 0529764 B1 EP0529764 B1 EP 0529764B1
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EP
European Patent Office
Prior art keywords
cloth
indicia
fabric
cleaning
target
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Expired - Lifetime
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EP19920304298
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German (de)
English (en)
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EP0529764A1 (fr
Inventor
Charles Robert Gasparrini
Walter Humberto Cano
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Baldwin Graphic Systems Inc
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Baldwin Graphic Systems Inc
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/06—Cleaning arrangements or devices for offset cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H26/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H26/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms
    • B65H26/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to predetermined lengths of webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/415—Unwinding
    • B65H2301/4152—Finishing unwinding process

Definitions

  • This invention relates to an improvement in cleaning the blanket cylinder of a printing press. More particularly, the invention relates to a method and system for altering uses to a first predetermined distance from the end of the cloth and for altering the uses to a second position immediately adjacent the end of the cloth on a cloth roll for cleaning the blanket cylinder of a lithographic press.
  • an inflatable bladder mechanism is periodically used to force the cleaning cloth into engagement with the blanket cylinder to clean the blanket cylinder in conjunction with water and/or solvent which is directed towards the cleaning cloth.
  • the automatic blanket cleaner as described in the foregoing patent has been a successful commercial embodiment for some time.
  • the commercial embodiment has been used in combination with switch means for indicating to the operator when the cloth on the cloth supply roll is near completion and when the cloth supply roll is empty.
  • the automatic blanket cylinder cleaner is used with a limit switch which determines or senses the diameter of the cloth on the cloth supply roll from which the length of cloth can be inferred.
  • the determination of the diameter of cloth remaining on the roll gives an estimation of the linear length of cloth remaining on the roll.
  • the switches or sensors are used in combination with a signal which can be visual and/or audio for the purpose of signalling to the operator then the cloth is near the end of its supply and when the supply of cloth has been depleted. Warning systems of the type described above has been used with success even though there are some limitations as to the accuracy of such systems.
  • a cloth supply roll may consist of about 11 m. (about twelve (12) yards) of cloth which can be used for about two hundred and fifty washes for a web press or about one hundred and twenty-five washes for a sheet feed press.
  • an operator in an eight hour shift may have in the range of 8-15 wash ups.
  • only about 5 mm (about two inches) of cloth may be necessary for a wash up of the blanket cylinder.
  • three feet (about 0.91 m) of cloth can be used for a substantial number of washes depending on various circumstances.
  • One of the purposes of this invention is to utilize as much cloth as possible for wash-ups and to avoid waste of cleaning cloth.
  • cloth may be defined as described in US-A-4,344,361 patent or could be some other type of a suitable fabric, cloth or paper material used for cleaning a blanket cylinder.
  • US-A-3,449,733 to Berquist relates to equipment where the material wound on the spool is magnetic or magnetizable.
  • a recording head records information (similar to a tape recorder) in the material being processed. This information is utilized by a sensing head to determine the end of the spool and control other machine functions.
  • US-A-3,990,625 to Jelling et al. refers to automatic bagging equipment that uses prepunched holes in a plastic web to indicate the end of the bag. Sensing is accomplished via spring fingers adopted to fit within the holes.
  • the patent also mentions the use of other types of material, such as opaque spots or the line which are sensed photo-electrically or electrocapacitavily.
  • US-A-3,146,431 to Betts discloses a patch of conductive material; namely, the tear strip used on cigarette packs which is applied to the end of a web .
  • the web is unwound through a sensor that consists of two conductive brushes which complete an electrical circuit when the conductive material contacts both brushes. This is used to indicate the end of the web to the machine operator.
  • US-A-3,184,177 to Hannah discloses holes or opaque patches or clear patches that are used on a filmstrip to accurately position the frame. Two photocells are used to sense the frame position.
  • US-A-3,542,304 to Hudson discloses two conductive rollers used to sense metallic particles embedded in a textile fabric web. This locates the particles so that they can be removed before they damage the fabric.
  • US-A-3,568,584 to Harvey discloses a camera autowind mechanism which senses the film position via contacts and conductive material on the film. The conductive material is applied so that regularly spaced discontinuities occur in the conductive material. These discontinuities are then sensed.
  • the patent also discloses holes in the film that are sensed by spring fingers that operate electrical contacts.
  • US-A-4,115,013 to Hedstrom discloses a photodetector which is used to sense the end of a printer ribbon. Reflective material is attached to the ribbon.
  • US-A-4,212,552 to Bemis et al. discloses conductive material which is applied to a printer ribbon. Two contact fingers touch the ribbon as it is unwound to complete an electrical circuit when the conductive material touches both contacts. This provides an end of ribbon signal to the printer.
  • US-A-2,821,284 to Garwood et al. discloses a conductive tape or foil that is attached to a carbon paper web and sensed by two conductive rolls. When the foil passes between the two rollers, an electrical signal is used to activate a warning device.
  • FR-A-2595985 discloses a method and apparatus for detecting absence of paper or the approach of the end of a reel of paper in a printer, in which the paper carries on the back a code in the form of at least one continuous or discontinuous track, wherein a detector for the code is provided to stop the printer when the detected code indicates the absence of paper or the end of the reel of paper before the printer.
  • Another object of this invention is to provide a new and improved system for cleaning blanket systems by determining the termination of the cloth supply.
  • a further object of the invention is to provide a cleaning cloth for a blanket cleaning system with an indicia means on the cloth and sensing means for sensing the indicia to give an operator information relative to the cleaning cloth.
  • a still further object of this invention is to provide a process for warning the press operator of the termination of the cloth supply by providing a target indicia on the cloth which can be sensed so as to alert the operator that a predetermined length of cloth remains and to warn the operator of the imminent ending of the cloth supply.
  • Another object of this invention is to provide indicia capable of being sensed by a sensor on a cleaning cloth in an appropriate location whereby during the blanket cleaning cycle the end of the cloth supply will be indicated.
  • a still further object of the invention is to provide at least one indicia a predetermined distance from the end of the cleaning cloth for a blanket cylinder whereby sensor means can determine when the cloth is near its end and when the cleaning cycle should be stopped.
  • a still further object of this invention is to provide a sensing method combination which is particularly adapted for use in a lithographic press environment which is adapted to sense the end of a cleaning cloth supply cycle.
  • the invention herein relates to cleaning blanket cylinders of lithographic presses and comprises selecting an indicia to be applied and/or connected to a non-metallic, non-magnetic fabric type cleaning cloth material which indicia can be sensed by another element and/or mechanism when in the appropriate vicinity.
  • the indicia is positioned on the cleaning cloth at a predetermined location on the cloth and oriented in accordance with the information sought.
  • the invention includes positioning and sensing the indicia selected at an appropriate location for the purpose of warning the operator of the forthcoming end of the cloth supply and/or actually ending the cleaning cycle at the end of the cloth supply.
  • the indicia can be in the form of metal, ferrous or non ferrous (such as aluminum foil, mercury, etc.) and/or magnetic material positioned on the non-metallic, non-magnetic cleaning cloth such as paper in any convenient manner.
  • the indicia may be in the form of strips or stripes of paint, e.g., black stripes, positioned longitudinally or transversely of the cloth and there may be one or more such indicia.
  • the indicia may be positioned on the cloth by an adhesive tape, weaving, painting or any other convenient manner.
  • an appropriate sensing means is provided for sensing the presence of the indicia.
  • This sensing means may be of the type which is responsive to metal, non ferrous, magnetic fields, capacitance, light which does not necessarily require contact between the sensor and the indicia for activating the sensor.
  • the invention may also utilize photoelectric principles of the visible and/or infrared type.
  • the invention can utilize retroreflective sensing, diffuse infrared sensing, diffuse visible sensing and fixed focus sensing.
  • This form of the invention requires that the indicia be of sufficient difference in light level with respect to the light level of the cloth that the sensor be able to sense a change in the amount of light received by the sensor.
  • This form of the invention can utilize visible or infrared light.
  • the invention consists of the novel parts, steps, construction, arrangements and improvements shown and described.
  • FIG. 1-3 there is shown therein the environment in which the present invention can be used which figures are comparable to Figures 1-3 of U.S. Patent 4,344,361. It is to be understood that the invention is not limited to use with that particular structural relationship of a blanket cleaner but is merely illustrative.
  • FIG. 1-3 there is a blanket cylinder 2, a cloth take-up roll 4 and a cloth supply roll 6 suitably mounted on stationary side frame 8.
  • a cleaning cloth C is fed or pulled from the cloth supply roll 6 to the cloth take-up roll 4.
  • the purpose of the cloth C is to clean the blanket cylinder 2.
  • the drawings show an inflatable bladder member 38 which is adapted to be inflated to engage the cloth C which in turn engages the blanket cylinder in a selected predetermined manner through any convenient mechanism such as described in United States Patent No. 4,344,361. It is understood that the fabric engaging means is not limited to an inflatable bladder means.
  • the cleaning cloth C should be uniformly absorbent to water and solvent and substantially as described in United States Patent No. 4,344,361.
  • the cloth is preferably non-metallic and non-magnetic and adaptable to have placed in or on indicia which may be in the form of small pieces of metal, non ferrous and/or magnetic material or paint in any convenient form or shape.
  • a sensor means 10 positioned so that the sensor 10 can sense the indicia 14 located on the cleaning fabric C.
  • the sensor can be of the type, described subsequently, which does not require contact but is responsive to metal, non ferrous, magnetic field or capacitance, all of which are known in the art.
  • Figure 4 shows in schematic form the cloth roll 4 with an indicia means on the cloth C, specific embodiments of which are described later, and a sensor(s) on a support member adapted to sense the indicia means.
  • the indicia may be a portion of magnetic tape, metallic, non ferrous and/or magnetic tape or metallic paint, the presence of which is capable of being sensed by commercially available sensors such as inductive, capacitive, electromagnetic, photoelectric.
  • the indicia on the cloth may be metallic, non ferrous and in the form of a metal tape, non ferrous tape, electroconductive paints, a metal paint or some other type of metal member which can be applied or attached to the cloth of the fabric cloth supply in any convenient manner.
  • this indicia could be black or other dark paint.
  • the indicia may be attached to the fabric by an adhesive, by tape threads, by weaving or any other convenient manner.
  • indicia on the cloth there can be one or more indicia on the cloth depending on the desired sequence of operations.
  • a first target indicia 22 which is for the purpose of warning the operator that the end of the cloth is near
  • a second target indicia 26 which alerts the operator that the cloth supply has ended and the cleaning cycle must be ended in order to avoid scratching.
  • a plurality of target indicia for each predetermined position are shown. This is one form of the invention which does require the operator to know the exact location of the target indicia on the cloth. If desired, a single target indicia can be used for each predetermined location provided it is known that such target indicia can be aligned with the sensor means.
  • the signals could be visual or audio or both as desired.
  • the target indicia can be positioned on the cloth a first and a second predetermined distance from the end of the cloth.
  • the first predetermined distance can be determined by the length of cloth required for each wash multiplied by number of washes which the operator desires to be aware of before the end of the cleaning cloth.
  • the second predetermined distance can be whatever distance the operator requires to stop the wash-up cleaning operation in sufficient time to prevent potential injury to the blanket cylinder.
  • FIG. 6 another form of the invention is illustrated.
  • this form of the invention there is a single indicia target stripe or strip utilized which runs along the length of the cleaning cloth.
  • the target indicia 24 has a leading end 28 and a trailing end 30.
  • the target indicia is such that the leading end 28 is at the first predetermined position for the purpose of signaling the beginning of the end of the cleaning cloth whereas the trailing end 30 signals the actual end of the cleaning cloth.
  • the sensor means which may be of the same type as in Figure 5, it activates a warning signal which warning signal which signals terminates when the trailing edge 30 is sensed by the sensor.
  • the first target indicia signals the operator that there is only a predetermined length of cleaning cloth left on the cloth supply roll. This can be done, e.g. by coating the pulser of the cylinder. This enables the operator to know that only a certain amount of cloth is left for cleaning purposes and he can plan his work shift accordingly.
  • the second target indicia another warning signal will occur when the cleaning cloth is at its end so that the operator will not permit the blanket cylinder to go through with the cleaning cycle which could cause damage such a scratching of the blanket cylinder.
  • the target indicia may be metal, non ferrous, electroconductive paints and/or metallic or non-metallic dark paint.
  • a metallic indicator it can be used with any convenient commercially available micro switch, such as PK 87592 available from the Honeywell Division.
  • PK 87592 available from the Honeywell Division.
  • Such a micro switch may be a proximal sensor activated by a ferrous metal of appropriate thickness or even a non-ferrous metal foil having a thickness in the range of 0.0127 to 0.0508 mm (0.0005 to 0.002 inches). With such a proximal sensor, actual contact is not needed and it detects moving targets without physical contact or magnetic attraction between sensor and target.
  • a magnetic indicia or target for which a sensor responsive to magnetic forces is required.
  • a 400SR Sensor from the Honeywell Division. This is a low cost solid state Hall effect sensor which is magnetically operated by the 6 to 16 VDC supply.
  • Magnetic Inks are magnetically charged and display relatively low flux for a short time. They are for light offset and water press form and must be heat set before use.
  • Electro Conductive Inks These inks have a high ohm resistance but the conductivity may be deactivated and the ink may come off if there is contact with water and/or moisture.
  • Electro Conductive Paints These paints have great conductivity characteristics and are cost effective. However, inductive sensors are not capable of detecting these conductive paints due to their lack of high ferrous content. In addition, such paints require air/heat to dry on application.
  • Conductive Graphite Resistant Coatings Such materials have high conductive characteristics and come in a gel like form and must be diluted in deionized water and mixed.
  • Capacitive Sensors The cloth has a low dielectric constant and detection is very difficult.
  • Capacitive Proximity Sensors In this situation, a sensor is used to sense dielectric materials, metals, conductive materials, rubber, glass, and sensing depends on the dielectric constant. These sensors tend to be large in size and the sensing distance is based on the size of the sensing head.
  • Figure 7 shows the cloth roll with inductive type indicia thereon.
  • Figure 10 illustrates in schematic form, an inductive proximity sensor 29 consisting of a coil 30a and ferrite core 32, an oscillator 34 and detector 36 circuit and a solid state output 38.
  • the function of the oscillator 32 is to create a high frequency field radiating from the coil in front of the sensor which is centered around the axis of the coil 30a.
  • the ferrite core bundles and directs the elector-magnetic field to the front.
  • the sensor 29 is positioned within an aperture 35 ( Figures 8-9) in a support member 37 in any convenient manner. As shown in Figure 9, the sensor is positioned so as to detect the warning strip indicia 22 and the end of strip indicia or target 26.
  • the indicia is preferably aluminum foil (31), but it may also be stainless steel, mercury, lead, brass or copper.
  • eddy currents are caused to be induced in the surface of the indicia. This causes a loss of energy in the oscillator circuit and a smaller amplitude of oscillation. This change in amplitude generates a signal until the indicia leaves the sensing area and the sensor returns to its normal state.
  • the preferred indicia material is aluminum foil having a thickness of about 0.0508 m (about .002 inches).
  • the distance between the aluminum foil and the sensor is approximately 6.35 mm (about .250 inches) maximum and there is accurate detection if within the sensing distance of 6.35 mm (.250 inches) maximum. It is desirable that the cloth be kept in a taut condition for reliable results. This form of the invention is not adversely affected by air borne dust or other contaminants.
  • Another form of the invention involves the principle of photoelectric sensing wherein light energy travels through space in a concentrated form i.e. photons.
  • the photons strike a surface in the application referred to as an indicia to liberate photoelectrons.
  • the energy of the photoelectrons can be used to create an electric current in a manner understood in the art.
  • the electric current can be used to activate a light or other visible or audible alarm.
  • optical systems of any photoelectric sensor is for one of three basic sensing modes which can be used with visible or infrared light. These are classified as opposed, retroreflective or proximity.
  • the photoelectric proximity mode is further sub-classified as diffuse proximity, divergent-beam proximity, convergent-beam proximity, and background suspension proximity.
  • Retroreflective Sensing In this form the indicia is a reflective target on the cloth roll and the detector detects reflective surfaces on tape.
  • the reflective indicia target returns light along the same optical axis. It is desirable that the reflective distance not exceed .6 inches (about 15 mm) over the minimum requirement.
  • Diffuse Infrared Sensing uses diffuse infrared sensing where the sensor detects a black flat paint stripe 40 on the cloth roll.
  • the black stripe is in the range of about 13 to 25 mm (about 1 ⁇ 2 to 1 inch) in width, preferably one inch (about 25 mm) in width.
  • the infrared light strikes the indicia's surface and light is scattered by the surface at all angles with a small portion of the light is reflected back along the optical axis.
  • the sensing distance in the preferred embodiment is approximately 20 mm (approximately .80 inches).
  • the detection of the black stripe against the light colored fabric background depends on the density of the stripe and should be relatively dense for accurate detection since it requires a relatively large contrast differential to perform satisfactorily in an atmospheric area contaminated with dust, debris, etc. It is preferred that the density specification be about 1.14 as measured in a standard density manner. The density range measurement may be about .9 to 1.5 on the density measuring instrument.
  • Figure 11 shows in schematic perspective a painted black stripe 40 on a cloth roll. There are two such stripes as shown in Figure 13.
  • Figure 13 shows a sensor in relation to the cloth roll and indicia.
  • a low-profile diffuse proximity sensor 100 Model No. 05-Q08-AN7-V11131 of Banner Engineering Corp. of Minneapolis, MN was utilized.
  • the sensor in the appropriate operating made which is the "dark on” operation which conducts when the sensor does not use the reflection of its own modulated light from the cloth because the dark indicia is in the path.
  • the Banner QO8 series sensor low-profile infrared sensor diffuse proximity sensor with a metal housing is shown mounted in a frame member 46 by a screw means 48 ( Figures 12-13) on an aperture in what is shown as an L shaped support member adjacent the feed cloth roll.
  • the feed cloth roll has two black stripes of the type described above, one of which is a warning stripe 102, and the other being an end of cloth stripe 104.
  • the senor is activated when the black stripes are within the sensor range to sound and/or display an appropriate alarm.
  • the cloth fabric C has a indicia such as a black stripe 22 painted therein.
  • Light is provided by any convenient source and a photoconductor 50 positioned to receive the light reflected light.
  • the difference in light generates an electric signal which goes to a comparator 52 having a reference threshold which can cause an alarm 54 of any form, visual or audible to be activated.
  • Diffuse Visible Sensing Another embodiment of the invention utilizes diffuse visible sensing where the sensor is used to detect black paint stripes on the cloth roll.
  • the sensing distance is .6 to .8 inches (about 15 to 20 mm) without a dust or debris on the lens or about 13 mm (about .5 inches) sensing distance with a corn starch or other debris on the lens.
  • the detection of the black stripe on the cloth roll can be detected even if the black stripe is not dense because the contract recognition between black and white is very high and the sensor can distinguish between light and heavy paint stripes.
  • the stripe is between 1 ⁇ 4 and 1 inch (about 6 and 25 mm) wide.
  • Fixed Focus Sensing there is a fixed focus convergent beam sensing and the light beam and sensing area is focused at a fixed distance in front of the sensing control. The power is thereby concentrated in one area for increased reliability and accuracy. The color contrast is high and the sensor can distinguish between light and heavy paint stripes. This form uses visible light rather than infrared light.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Geophysics And Detection Of Objects (AREA)

Claims (30)

  1. Procédé pour déterminer la fin d'une matière textile de nettoyage (c) destiné à être utilisé pour le nettoyage du blanchet (2) d'une presse à imprimer du type dans lequel la matière textile de nettoyage s'avance à partir d'un rouleau d'alimentation en matière textile (6) vers un rouleau de réception de matière textile (4) et dans lequel la matière textile de nettoyage (c) absorbe à la fois eau et solvant et est adaptée pour s'engager avec le blanchet positionné entre le rouleau de réception de matière textile (4) et le rouleau d'alimentation en matière textile (6) caractérisé en ce que le procédé comprend :
    (a) la fourniture d'une matière textile non magnétique, non métallique (c) qui absorbe à la fois eau et solvant;
    (b) la fourniture sur ladite matière textile (c) d'au moins un indice cible (14, 20, 22, 24, 26, 40, 102, 104) du type capable d'être détecté par des moyens de détection (10, 29, 100) ledit indice cible étant à au moins une position sélectionnée par l'utilisateur sur ladite matière textile de nettoyage ;
    (c) la fourniture de moyens de détection sensibles au dit indice cible sans nécessiter de contact entre les moyens de détection et l'indice et capables de signifier une réponse des dits moyens de détection au dit indice cible par laquelle un signal est généré lorsque lesdits moyens de détection répondent au dit indice cible dans la position sélectionnée.
  2. Procédé comme défini dans la revendication 1 dans lequel ledit indice cible est positionné à une première distance prédéterminée à partir de la fin de la matière textile de nettoyage et à une seconde distance prédéterminée immédiatement adjacente à l'extrémité de fin de la matière textile de nettoyage par lequel les moyens de détection détectent l'indice cible (22; 28; 102) à la première distance prédéterminée à partir de la fin de la matière textile de nettoyage (c) afin de signaler le commencement de la fin de ladite matière textile et de nouveau (26; 30; 104) à cette seconde distance prédéterminée immédiatement avant la véritable fin de la matière textile.
  3. Procédé comme défini dans la revendication 2 dans lequel ladite première distance prédéterminée est déterminée par la longueur de matière textile (c) nécessaire à un nombre prédéterminé de lavages.
  4. Procédé comme défini dans la revendication 3 dans lequel la seconde distance prédéterminée est adjacente à l'extrémité de la matière textile.
  5. Procédé comme défini dans la revendication 3 comportant une pluralité d'indices cible (22, 26; 102, 104).
  6. Procédé comme défini dans la revendication 5 comportant un indice cible unique se composant d'une bande (14).
  7. Procédé comme défini dans la revendication 6 dans lequel l'indice cible est un matériau métallique.
  8. Procédé comme défini dans la revendication 7 dans lequel l'indice cible est une peinture métallique.
  9. Procédé comme défini dans la revendication 8 dans lequel l'indice cible se compose d'un matériau magnétique.
  10. Procédé comme défini dans la revendication 9 dans lequel l'indice cible se compose d'un matériau en peinture magnétique.
  11. Procédé comme défini dans la revendication 2 dans lequel l'indice se compose d'un matériau non ferreux.
  12. Procédé comme défini dans la revendication 2 dans lequel l'indice se compose d'une peinture conductrice d'électricité.
  13. Procédé comme défini dans la revendication 2 dans lequel l'indice se compose d'une bande de couleur sombre (40) sur la matière textile.
  14. Dispositif de nettoyage de blanchet pour déterminer la fin d'une matière textile de nettoyage (c) destinée à être utilisée pour le nettoyage du blanchet d'une presse à imprimer du type dans lequel la matière textile de nettoyage (c) s'avance à partir d'un rouleau d'alimentation en matière textile (6) vers un rouleau de réception de matière textile (4) et dans lequel la matière textile de nettoyage (c) est adaptée pour s'engager avec le blanchet (2) positionné entre le rouleau de réception de matière textile (4) et le rouleau d'alimentation en matière textile (6) du type comportant une matière textile qui absorbe à la fois eau et solvant caractérisé en ce que le dispositif comprend :
    (a) une matière textile non métallique, non magnétique;
    (b) des moyens de détection (10, 29, 100) positionnés de manière à être capable de répondre à au moins un indice cible (14, 20, 22, 24, 26, 40, 102, 104) positionné sur ladite matière textile à une position sélectionnée par l'utilisateur capable d'être détectée par des moyens de détection (10, 29, 100) lorsque le rouleau de matière textile est reçu par le rouleau de réception de matière textile;
    (c) lesdits moyens de détection (10, 29, 100) étant sensibles au dit indice cible sans contact entre les moyens de détection et l'indice et capables de signifier une réponse des dits moyens de détection au dit indice cible par laquelle un signal est généré lorsque lesdits moyens de détection répondent au dit indice cible dans la position sélectionnée par l'utilisateur.
  15. Dispositif comme défini dans la revendication 14 dans lequel ledit indice cible est positionné sur la matière textile à une première distance prédéterminée à partir de la fin de la matière textile de nettoyage et à une seconde distance prédéterminée immédiatement adjacente à l'extrémité de fin de la matière textile de nettoyage par lequel les moyens de détection détectent l'indice cible (22; 28; 102) à la première distance prédéterminée à partir de la fin de la matière textile de nettoyage afin de signaler le commencement de la fin de ladite matière textile et de nouveau (26; 30; 104) à cette seconde distance prédéterminée immédiatement avant la véritable fin de la matière textile.
  16. Dispositif comme défini dans la revendication 15 dans lequel ladite première distance prédéterminée de premier indice est déterminée par la longueur de matière textile nécessaire à un nombre prédéterminé de lavages.
  17. Dispositif comme défini dans la revendication 16 dans lequel la seconde distance prédéterminée est adjacente à l'extrémité de la matière textile.
  18. Dispositif comme défini dans la revendication 17 comportant une pluralité d'indices cible (22, 26; 102, 104).
  19. Dispositif comme défini dans la revendication 18 comportant un indice cible unique se composant d'une bande (24).
  20. Dispositif comme défini dans la revendication 18 dans lequel l'indice cible est un matériau métallique.
  21. Dispositif comme défini dans la revendication 20 dans lequel l'indice cible est une peinture métallique.
  22. Dispositif comme défini dans la revendication 21 dans lequel l'indice cible se compose d'un matériau magnétique.
  23. Dispositif comme défini dans la revendication 22 dans lequel l'indice cible se compose d'un matériau en peinture magnétique.
  24. Dispositif comme défini dans la revendication 15 dans lequel l'indice se compose d'un matériau non ferreux.
  25. Dispositif comme défini dans la revendication 15 dans lequel l'indice se compose d'une peinture conductrice d'électricité.
  26. Dispositif comme défini dans la revendication 15 dans lequel l'indice se compose d'une bande de couleur (40) sur la matière textile.
  27. Dispositif selon l'une quelconque des revendications 14 à 26 dans lequel les moyens de détection comprennent un dispositif de détection à lumière visible ou infra rouge diffuse (100) positionné sur le dispositif de nettoyage de blanchet dans une position permettant de détecter un indice sur la matière textile qui a une couleur essentiellement différente de celle de la matière textile et le dispositif de nettoyage comprenant des moyens destinés à signaler le moment où le dispositif de détection détecte la différence entre l'indice et la matière textile et génère un courant électrique.
  28. Dispositif comme défini dans la revendication 27 dans lequel lesdits indices sont des bandes (40) de peinture noire et le dispositif de détection (100) est un détecteur infra rouge diffus.
  29. Dispositif comme défini dans la revendication 27 dans lequel ledit indice est une peinture noire (40) et le dispositif de détection (100) est un détecteur de type à lumière visible diffuse.
  30. Dispositif selon l'une quelconque des revendications 14 à 26 dans lequel les moyens de détection comprennent un dispositif de détection photoélectrique (50) positionné dans le dispositif de nettoyage de blanchet dans une position permettant de détecter un indice (22) sur la matière textile qui a une couleur essentiellement différente de celle de la matière textile et le dispositif de nettoyage comprenant des moyens (52) destinés à signaler le moment où le dispositif de détection détecte une différence entre l'indice et la matière textile et génère un courant électrique.
EP19920304298 1991-08-30 1992-05-13 Procédé et système pour déterminer la fin d'un rouleau de matière textile destiné à être utilisé dans un dispositif de nettoyage du blanchet dans une presse Expired - Lifetime EP0529764B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US75285291A 1991-08-30 1991-08-30
US752852 1991-08-30

Publications (2)

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EP0529764A1 EP0529764A1 (fr) 1993-03-03
EP0529764B1 true EP0529764B1 (fr) 1996-04-17

Family

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Application Number Title Priority Date Filing Date
EP19920304298 Expired - Lifetime EP0529764B1 (fr) 1991-08-30 1992-05-13 Procédé et système pour déterminer la fin d'un rouleau de matière textile destiné à être utilisé dans un dispositif de nettoyage du blanchet dans une presse

Country Status (4)

Country Link
EP (1) EP0529764B1 (fr)
JP (1) JPH05212856A (fr)
CN (1) CN1050325C (fr)
DE (1) DE69209937T2 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06292782A (ja) * 1993-02-15 1994-10-21 Hitachi Maxell Ltd 被検出部材、それの処理装置ならびに処理方法
DE4308288C1 (de) * 1993-03-16 1994-09-29 Signode Bernpak Gmbh Wickelkern für Umreifungsmittel zum Umreifen von Packstücken
EP0730960A3 (fr) * 1995-03-09 1997-07-09 Baldwin Graphic System Inc Procédé et système pour déterminer la fin d'un rouleau de matière textile destiné à être utilisé dans un dispositif de nettoyage d'un cylindre dans une machine d'impression
US6041711A (en) * 1996-06-27 2000-03-28 Baldwin-Japan, Ltd. Cylinder cleaning device
EP0906884A1 (fr) * 1997-10-02 1999-04-07 JÜNEMANN, Ulrich Filet allongé monté sur un support, procédé de sa fabrication, dispositif pour dérouler le filet du support et utilisation du filet
JP4371450B2 (ja) * 1998-12-08 2009-11-25 デュプロ精工株式会社 孔版印刷機の原紙判別装置
DE50007292D1 (de) * 2000-05-17 2004-09-09 Grapha Holding Ag Vorrichtung zum Auf- und Abwickeln von flachen Druckbogen auf bzw. von einem drehbar gelagerten Wickelkern
DE10215258B4 (de) * 2002-04-06 2005-09-01 Man Roland Druckmaschinen Ag Lösch- und Reinigungsvorrichtung für Zylinder, insbesondere Druckform- und Gummituchzylinder einer Druckmaschine, mit einer Vorrichtung für eine Tuchende-Detektion
DE10255799A1 (de) * 2002-11-28 2004-06-17 Man Roland Druckmaschinen Ag Verfahren und Vorrichtung zum Waschen eines Gummituches
AT502849B1 (de) * 2005-11-30 2010-09-15 Lunatone Ind Elektronik Gmbh Spulgut-menge und -reserve detektor
DE102008053118A1 (de) * 2008-10-26 2010-04-29 Michael Kasper Vorrichtung und Verfahren zur Reinigung von Gummitüchern auf Gummituchzylindern
TWI471470B (zh) * 2012-08-03 2015-02-01 Orisol Asia Ltd 縫紉機底線之標示與消耗狀態檢驗裝置
WO2014019230A1 (fr) * 2012-08-03 2014-02-06 欧利速精密工业股份有限公司 Dispositif de marquage et de détection d'un état vidé de fil de canette dans une machine à coudre

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3146431A (en) * 1958-07-22 1964-08-25 Dow Chemical Co Web end control
US3184177A (en) * 1962-08-06 1965-05-18 Jack W Hannah Film alignment and braking device
US3449733A (en) * 1964-04-01 1969-06-10 Nat Standard Co Methods and apparatus for use in the industrial magnetic materials art
US3542304A (en) * 1967-11-21 1970-11-24 Deering Milliken Res Corp Fabric take-up apparatus
US4115013A (en) * 1977-03-30 1978-09-19 Xerox Corporation End-of-ribbon sensor device
US4344361A (en) * 1979-04-19 1982-08-17 Baldwin-Gegenheimer Corporation Automatic blanket cylinder cleaner
FR2595985B1 (fr) * 1986-03-20 1990-11-02 Equip Indl Normand Dispositif de detection de l'absence d'une bande de papier ou de l'approche de la fin de la bande de papier d'une imprimante

Also Published As

Publication number Publication date
JPH05212856A (ja) 1993-08-24
EP0529764A1 (fr) 1993-03-03
CN1050325C (zh) 2000-03-15
DE69209937T2 (de) 1996-10-02
DE69209937D1 (de) 1996-05-23
CN1072135A (zh) 1993-05-19

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