EP0730960A2 - Verfahren und System zur Ermittlung des Textilrollenendes für die Verwendung in Zylinderreinigungseinrichtungen für eine Druckmaschine - Google Patents

Verfahren und System zur Ermittlung des Textilrollenendes für die Verwendung in Zylinderreinigungseinrichtungen für eine Druckmaschine Download PDF

Info

Publication number
EP0730960A2
EP0730960A2 EP96301108A EP96301108A EP0730960A2 EP 0730960 A2 EP0730960 A2 EP 0730960A2 EP 96301108 A EP96301108 A EP 96301108A EP 96301108 A EP96301108 A EP 96301108A EP 0730960 A2 EP0730960 A2 EP 0730960A2
Authority
EP
European Patent Office
Prior art keywords
media
target indicia
indicia
cleaning
sensor means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96301108A
Other languages
English (en)
French (fr)
Other versions
EP0730960A3 (de
Inventor
C. Robert Gasparrini
Alan F. Barney
Walter H. Cano
Arnold M. Heitmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baldwin Graphic Systems Inc
Original Assignee
Baldwin Graphic Systems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baldwin Graphic Systems Inc filed Critical Baldwin Graphic Systems Inc
Publication of EP0730960A2 publication Critical patent/EP0730960A2/de
Publication of EP0730960A3 publication Critical patent/EP0730960A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • 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
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/20—Wiping devices
    • B41P2235/24—Wiping devices using rolls of cleaning cloth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/20—Wiping devices
    • B41P2235/24—Wiping devices using rolls of cleaning cloth
    • B41P2235/242—Unwinding the cleaning cloth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/26—Spraying devices
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/51—Presence
    • B65H2511/512—Marks, e.g. invisible to the human eye; Patterns

Definitions

  • This invention relates to an improvement in cleaning the cylinders 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 and for altering uses to a third position on the cleaning cloth supply roll on a cloth roll for cleaning the cylinders of a printing 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 to 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 limit switches which determine or sense 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 when 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 and repeatability of such systems.
  • a cloth supply roll may consist of about twelve (12) yards of cloth or cleaning media 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 2-15 wash ups.
  • three feet of cleaning media 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 cleaning media as possible for wash-ups and to avoid waste of the cleaning media.
  • cloth may be defined as described in the 4,344,361 patent or could be some other type of a suitable fabric, cloth or paper material used for cleaning a printing press cylinder.
  • media is generic in describing the range of cleaning materials which are known to the art and is not limited to those listed above.
  • Patent Number 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.
  • Patent Number 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 photoelectrically or electrocapacitavily.
  • Patent Number 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.
  • Patent Number 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.
  • Patent Number 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 they can be removed before they damage the fabric.
  • Patent Number 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.
  • Patent Number 4,115,013 to Hedstrom discloses a photo-detector which is used to sense the end of a printer ribbon. Reflective material is attached to the ribbon.
  • Patent Number 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.
  • Patent Number 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.
  • EP-A-0529764 relates to a method for determining the end of a cleaning cloth C (which is non-metallic and non-magnetic) for cleaning the blanket cylinder of a lithographic press and device therefor, wherein the cloth C has indicia positioned on the cloth 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 C is fed for cleaning the roll.
  • the method of this application relies on the positioning of the indicia on the cloth itself in order to detect the end of the cloth. That system is more reliable than the other systems discussed above but nevertheless depends on the accurate placement of the end of cloth indicia on the cloth for reliability. Inaccurate placement of the indicia could lead to waste of the cloth if that indicia has been placed too far from the end, or to damage to the cylinder being cleaned, if it is placed too close to the end of the cloth.
  • Another object of this invention is to provide a new and improved system for cleaning printing press cylinders by determining the termination of the media supply roll.
  • a further object of the invention is to provide a cleaning media for a printing press cylinder cleaner with an indicia means on the media and sensing means for sensing the indicia to give an operator information relative to the cleaning media.
  • a still further object of this invention is to provide a process for warning the press operator of the termination of the media supply by providing a target indicia on the media which can be sensed so as to alert the operator that a predetermined length of media remains and to warn the operator of the imminent ending of the media supply.
  • Another object of this invention is to provide an indicia on the cleaning media capable of being sensed by a sensor in an appropriate location whereby during the cylinder cleaning cycle the end of the media 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 media for a cylinder cleaning system whereby sensor means can determine when the media is near its end and when the cleaning cycles should be stopped and the media changed.
  • a still further object of this invention is to provide a sensing method combination which is particularly adapted for use in a printing press environment which is adapted to sense the end of a cleaning media supply cycle roll.
  • Yet another object of this invention is to provide at least one indicia on the cleaning media supply roll core or shaft whereby the sensor means can determine when the media has left the core or shaft and that the cleaning cycle should be stopped.
  • the invention herein relates to cleaning cylinders, particularly blanket cylinders, of printing presses and comprises selecting an indicia to be applied and/or connected to a non-metallic, non-magnetic fabric type cleaning media material which indicia can be sensed by another element and/or mechanism when in the appropriate vicinity.
  • the indicia is positioned on the cleaning media at a predetermined location on the media 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 media supply and/or actually ending the cleaning cycle at the end of the media 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 media 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 on the media and there may be one or more such indicia.
  • the indicia may be positioned on the media by an adhesive tape, waving, painting, inking, 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 and 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 media 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 also involves placing at least one target indica on the cleaning media supply roll core to indicate that there is no more cleaning media remaining on the roll. Upon such a detection, the automatic cylinder cleaner or printing press may turn itself off.
  • the invention consists of the novel parts, steps, construction, arrangements and improvements shown and described.
  • Figure 1 is a perspective view of the automatic blanket cleaner of the type with which the present invention can be used.
  • Figure 2 is a vertical section taken along line 2-2 of Figure 1 showing the bladder not inflated, and the cleaning media spaced away from the cylinder.
  • Figure 3 is a section similar to Figure 2 showing the bladder inflated with the cleaning media in engagement with the cylinder.
  • Figure 4 is a diagrammatic view showing the relationship between the indicia and the sensor means.
  • Figure 5 is a view showing a plurality of spaced indicia on the media showing one form of the invention.
  • Figure 5A is another schematic view showing a plurality of indicia.
  • Figure 6 is a view showing an indicia on the media along the length of the media.
  • Figure 7 is a perspective view of a media roll with an aluminum strip indicia means of one form of the invention.
  • Figure 8 is a broken view partially in sections illustrating inductive sensor.
  • Figure 9 is a schematic view showing the relationship between the induction sensor and the media roll with indicia thereon.
  • Figure 10 schematically illustrates the wiring diagram.
  • Figure 11 shows a media roll of another form of the invention with a black stripe as an indicia on the media roll.
  • Figure 12 is a view partially broken away showing the mounting of visible light or infrared sensor means.
  • Figure 13 is a schematic view showing the relationship between the visible light or infrared sensor and the media roll with indicia thereon.
  • Figure 14 is a schematic illustration of a photoelectric sensor circuit.
  • Figure 15 is a schematic view showing the relationship between a sensor, the media roll with indicia thereon, and the cleaning media supply roll core with indicia thereon.
  • Figure 16 is a view showing a target indicia, a black cleaning media supply roll and a folded cleaning media.
  • Figure 17 is a view showing a target indicia, a black cleaning media supply roll and a trimmed cleaning media.
  • Figure 18 is a view showing a target indicia, a black cleaning media supply roll core and a full width cleaning media.
  • 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 there is a cylinder 2, a media take-up roll 4 and a media supply roll core 6 suitably mounted on a stationary side frame 8.
  • a cleaning media C is fed or pulled from the media supply roll core 6 to the media take-up roll 4.
  • the purpose of the media C is to clean the cylinder 2.
  • the drawings show an inflatable bladder member 38 which is adapted to be inflated to engage the media C which in turn engages the 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 media engaging means is not limited to an inflatable bladder means.
  • the cleaning media C should be uniformly absorbent to water and solvent and substantially as described in United States Patent No. 4,344,361.
  • the media 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 or ink in any convenient form or shape.
  • Figure 4 shows in schematic form the media roll 4 with an indicia means on the media C, specific embodiments of which are described later, and a sensor(s) on a support member adapted to sense the indicia means.
  • Sensor means S positioned so that the sensors can sense the indicia located on the cleaning media C.
  • a target indicia placed on the cleaning media C may be referred to as a media target indicia.
  • 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.
  • the indicia may be a portion of magnetic tape, metallic, non ferrous and/or magnetic tape, metallic paint, paint, or ink, the presence of which is capable of being sensed by commercially available sensors such as inductive, capacitive, electromagnetic, photoelectric.
  • the indicia on the media may be metallic, non ferrous and in the form of a metal tape, non ferrous tape, electroconductive paints, a metal paint, paint, or ink, or some other type of metal member which can be applied or attached to the media of the media supply in any convenient manner.
  • this indicia could be black or other dark paint or dark ink.
  • the indicia may be attached to the media by an adhesive, by tape threads, by weaving or any other convenient manner.
  • first target indicia 22 which is for the purpose of warning the operator that the end of the media is near
  • second target indicia 26 which alerts the operator that the media supply has ended and the cleaning cycle must be ended in order to avoid abraiding the cylinder.
  • second target indicia 26 provides a further alert that the end of the media supply is approaching.
  • 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 media. 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 cleaning media at a first and a second predetermined distance from the end of the media.
  • the first predetermined distance can be determined by the length of media required for each wash multiplied by number of washes which the operator desires to be aware of before the end of the cleaning media.
  • 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 cylinder.
  • the predetermined position can be user selected.
  • FIG. 6 another form of the invention is illustrated.
  • this form of the invention there is a single indicia target stripe or strip is utilized which runs along the length of the cleaning media.
  • 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 media whereas the trailing end 30 signals the actual end of the cleaning media.
  • trailing end 30 instead provides funher warning that the end of the cleaning media roll is approaching. It will be appreciated that when the leading edge is sensed by the sensor means, which may be of the same type as in Figure 5, it activates a 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 media left on the cloth supply roll. 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 or closer to its end so that the operator will not permit the printing press cylinder cleaner to go through with the cleaning cycle which could cause damage, such as abraiding the cylinder.
  • the target indicia may be metal, non ferrous, electroconductive paints and/or metallic or non-metallic dark paint or ink.
  • 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 0.0005 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 the 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 are Electroconductive Inks .
  • 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.
  • Such materials have high conductive characteristics and come in a gel like form and must be diluted in deionized water and mixed.
  • the media has a low dielectric constant and detection is very difficult.
  • 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 media roll with inductive type indicia thereon.
  • Figure 10 illustrates in schematic form, an inductive proximity sensor 29 consisting of a coil 30 and ferrite core 32, an oscillator 34 and detector 36 circuit and solid state output 38.
  • the function of the oscillator 32 is to create a high frequency filed radiating from the coil in front of the sensor which is centered around the axis of the coil 30.
  • the ferrite core bundles and directs the electro-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 24 on the media supply roll.
  • 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 .002 inches.
  • the distance between the aluminum foil and the sensor is approximately .250 inches maximum and there is accurate detection if within the sensing distance of .250 maximum. It is desirable that the media 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.
  • the indicia is a reflective target on the media roll and the detector detects reflective surfaces on the indicia.
  • the reflective indicia target returns light along the same optical axis. It is desirable that the reflective distance not exceed .6 inches over the minimum requirement.
  • a proposed preferred embodiment of the invention illustrated in Figures 11-14 uses diffuse infrared sensing where the sensor detects a substantially opaque indicia, such as a black flat paint or ink stripe 40, on the media supply roll.
  • the black stripe is in the range of about 1 ⁇ 2 to 2 inch in width, preferably either one or two inch in width.
  • the first target indicia is a 1 inch black stripe and the second target indicia is a 2 inch black stripe. Both stripes are preferably placed substantially along the full width of the cleaning media.
  • the infrared or visible 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 .80 inches.
  • the detection of the black stripe against the light colored media's 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 or inked black stripe 40 on a cleaning media roll. There are two full media width stripes shown in Figure 13.
  • Figure 13 shows a sensor in relation to the media roll and indicia.
  • a low-profile diffuse proximity sensor Model No. 05-Q08-AN7-V11131 of Banner Engineering Corp. of Minneapolis, MN can be utilized.
  • the sensor in the appropriate operating mode which is the "dark on” operation, which conducts when the sensor does not use the reflection of its own modulated light from the media 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 media supply roll.
  • the media has two black stripes of the type described above, one of which is a warning stripe, and the other being an end of cloth stripe.
  • the senor is activated when the black stripes are within the sensor range to sound, display and/or control an appropriate alarm.
  • the cleaning media C has an indicia such as a black stripe 22 painted or inked thereon.
  • Light is provided by any convenient source and a photoelectric sensing device 50 is positioned to receive the light reflected light. As shown by the dash lines, 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.
  • a preferred embodiment of the invention utilizes diffuse visible sensing where the sensor is used to detect black paint or ink stripes on the media roll.
  • the sensing distance is .6 to .8 inches without a dust or debris on the lens or about .5 inches sensing distance with a corn starch or other debris on the lens.
  • the detection of the black stripe on the media roll can be detected even if the black stripe is not dense because the contrast recognition between black and white is very high and the sensor can distinguish between light and heavy paint or ink.
  • the first target indicia is a 1 inch stripe and the second target indicia is a 2 inch stripe substantially extending across the width of cleaning media C.
  • 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.
  • the cleaning media is wrapped around a cleaning media supply roll core or shaft 60.
  • the cleaning media supply roll core 60 is typically made of cardboard but may be constructed for other appropriate materials.
  • at least one target indicia 62 is placed on cleaning media supply roll core 60.
  • This target 62 may be referred to as the core target indicia.
  • this is done by painting or inking cleaning media supply roll core 60 black.
  • only a portion of cleaning media supply roll core 60 is black.
  • one of the other types of target indicia discussed above is placed on cleaning media supply roll core 60.
  • a sensor means is used to detect the core target indicia placed cleaning media supply roll core 60 as shown in Figure 15. Depending on the types of target indicias placed on both cleaning media C and cleaning media supply roll core 60, the same sensor means or different sensor means are used to detect the various target indicias.
  • the target indicia placed on the cleaning media supply roll core is used as an emergency end of media detector. If for some reason the sensor means did not detect either the first or second target indicias, the sensor means will detect the target indicia on cleaning media supply roll core 60 and issue an end of media signal or warning. Thus, with a target indicia on the cleaning media supply roll core, the worst that can happen is that the operator will receive no-media or end of media signal without first receiving a low-media signal.
  • only one media target indicia 65 may be placed on the cleaning media to indicate when low-media remains and core target indicia 62 indicates no-media remaining.
  • Such a system reduces costs by not having to place a second target indicia on the cleaning media. Because of the damage to the cylinder cleaning system when no media is used, it is advantageous for the sensor means to detect the core target indicia 62 before the cleaning media C is fully removed from the cleaning media supply roll core 60. This can be done in various ways. Two examples are provided as illustrations.
  • the media target indicia 65 is placed approximately 24 inches from the end of the media.
  • the cleaning media C is then folded at substantially a 45° degree angle on both sides over the last 12 inches of cleaning media before winding cleaning media C on cleaning media supply roll core 60.
  • the sensor means S will detect the core target indicia and classify it as a no-media or end of media warning.
  • a portion of cleaning media C is trimmed from the side(s) of cleaning media C near the terminal end of cleaning media C allowing sensor means S to detect the core target indicia.
  • approximately six to twelve inches is trimmed off of both sides of cleaning media C for approximately the last twelve inches of cleaning media C.
  • a second sensor means S is used to detect the core target indicia.
  • the advantage of the second sensor means S is that upon detection of the core target indicia, in addition to a audible or visual alarm, the second sensor means turns off either the cylinder cleaner system and/or the printing press in order to prevent damage.
  • a different type of target indicia is placed on cleaning media C than is placed on cleaning media supply roll core 60.
  • either the first sensor means must be placed in a position so as not to detect the core target indicia, see for example Figures 4 and 9, or the second sensor means must be placed so that it will not detect the media target indicias, see for examples target indicias shown in Figures 5A and 6.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP96301108A 1995-03-09 1996-02-19 Verfahren und System zur Ermittlung des Textilrollenendes für die Verwendung in Zylinderreinigungseinrichtungen für eine Druckmaschine Withdrawn EP0730960A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US401362 1989-08-31
US40136295A 1995-03-09 1995-03-09

Publications (2)

Publication Number Publication Date
EP0730960A2 true EP0730960A2 (de) 1996-09-11
EP0730960A3 EP0730960A3 (de) 1997-07-09

Family

ID=23587439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96301108A Withdrawn EP0730960A3 (de) 1995-03-09 1996-02-19 Verfahren und System zur Ermittlung des Textilrollenendes für die Verwendung in Zylinderreinigungseinrichtungen für eine Druckmaschine

Country Status (3)

Country Link
EP (1) EP0730960A3 (de)
JP (1) JPH08276571A (de)
CN (1) CN1076668C (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29708470U1 (de) * 1997-05-13 1997-07-10 Roland Man Druckmasch Reinigungsvorrichtung für einen Zylinder oder eine Walze einer Druckmaschine
EP1099554A2 (de) * 1999-11-13 2001-05-16 Baldwin Grafotec GmbH Druckmaschinenzylinder-Reinigungstuch und -Reinigungsvorrichtung
GB2467399A (en) * 2009-02-03 2010-08-04 Easypack Ltd Metal roll stopper.
DE102010016055A1 (de) 2010-03-22 2011-09-22 Krones Ag Vorrichtung zur Kontrolle von Spulen mit aufgewickeltem Folienmaterial
US8733888B2 (en) 2010-07-30 2014-05-27 Hewlett-Packard Development Company, L.P. Printhead cleaner

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4756772B2 (ja) * 2001-05-18 2011-08-24 日本ボールドウィン株式会社 シリンダ洗浄装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2538105A1 (de) * 1974-09-11 1976-04-01 Hans Jacob Dipl Ing Moestue Vorrichtung zum reinigen eines zylinders einer druckmaschine
DE2726855A1 (de) * 1977-06-15 1979-05-03 Agfa Gevaert Ag Fuehlmesseinrichtung fuer bandenden von ablaufenden materialbahnen
JPS5895061A (ja) * 1981-11-30 1983-06-06 Toshiba Corp 記録装置ほおける記録紙終了検出方法
US4496117A (en) * 1982-11-01 1985-01-29 Canon Kabushiki Kaisha Web transport device
EP0529764A1 (de) * 1991-08-30 1993-03-03 BALDWIN GRAPHIC SYSTEMS, Inc. Verfahren und System zur Bestimmung des Textilrollenendes zur Verwendung in einer Gummituchreinigungsvorrichtung einer Druckmaschine
WO1994006633A1 (en) * 1992-09-18 1994-03-31 Jimek International Ab Method and apparatus for automatically cleaning rollers, particularly blanket cylinders and counter-pressure cylinders

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2538105A1 (de) * 1974-09-11 1976-04-01 Hans Jacob Dipl Ing Moestue Vorrichtung zum reinigen eines zylinders einer druckmaschine
DE2726855A1 (de) * 1977-06-15 1979-05-03 Agfa Gevaert Ag Fuehlmesseinrichtung fuer bandenden von ablaufenden materialbahnen
JPS5895061A (ja) * 1981-11-30 1983-06-06 Toshiba Corp 記録装置ほおける記録紙終了検出方法
US4496117A (en) * 1982-11-01 1985-01-29 Canon Kabushiki Kaisha Web transport device
EP0529764A1 (de) * 1991-08-30 1993-03-03 BALDWIN GRAPHIC SYSTEMS, Inc. Verfahren und System zur Bestimmung des Textilrollenendes zur Verwendung in einer Gummituchreinigungsvorrichtung einer Druckmaschine
WO1994006633A1 (en) * 1992-09-18 1994-03-31 Jimek International Ab Method and apparatus for automatically cleaning rollers, particularly blanket cylinders and counter-pressure cylinders

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 7, no. 197 (M-239), 27 August 1983 & JP 58 095061 A (TOKYO SHIBAURA DENKI KK), 6 June 1983, *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29708470U1 (de) * 1997-05-13 1997-07-10 Roland Man Druckmasch Reinigungsvorrichtung für einen Zylinder oder eine Walze einer Druckmaschine
EP1099554A2 (de) * 1999-11-13 2001-05-16 Baldwin Grafotec GmbH Druckmaschinenzylinder-Reinigungstuch und -Reinigungsvorrichtung
DE19954671A1 (de) * 1999-11-13 2001-05-17 Baldwin Grafotec Gmbh Druckmaschinenzylinder-Reinigungstuch und -Reinigungsvorrichtung
EP1099554A3 (de) * 1999-11-13 2001-09-19 Baldwin Grafotec GmbH Druckmaschinenzylinder-Reinigungstuch und -Reinigungsvorrichtung
GB2467399A (en) * 2009-02-03 2010-08-04 Easypack Ltd Metal roll stopper.
DE102010016055A1 (de) 2010-03-22 2011-09-22 Krones Ag Vorrichtung zur Kontrolle von Spulen mit aufgewickeltem Folienmaterial
EP2368825A1 (de) 2010-03-22 2011-09-28 Krones AG Vorrichtung zur Kontrolle von Spulen mit aufgewickeltem Folienmaterial
US8766223B2 (en) 2010-03-22 2014-07-01 Krones Ag Device for monitoring rolls of film material wound thereon and packaging machine
US8733888B2 (en) 2010-07-30 2014-05-27 Hewlett-Packard Development Company, L.P. Printhead cleaner

Also Published As

Publication number Publication date
JPH08276571A (ja) 1996-10-22
CN1139049A (zh) 1997-01-01
CN1076668C (zh) 2001-12-26
EP0730960A3 (de) 1997-07-09

Similar Documents

Publication Publication Date Title
EP0529764B1 (de) Verfahren und System zur Bestimmung des Textilrollenendes zur Verwendung in einer Gummituchreinigungsvorrichtung einer Druckmaschine
US4533926A (en) Strip chart recorder and medium status
EP0730960A2 (de) Verfahren und System zur Ermittlung des Textilrollenendes für die Verwendung in Zylinderreinigungseinrichtungen für eine Druckmaschine
EP3500433B1 (de) Drucker
US4136454A (en) Apparatus for gauging the thickness of moving laminar material
US6294033B1 (en) Lamination apparatus and sheet roll for use in lamination apparatus
CN100357110C (zh) 印刷装置
DE59301385D1 (de) Etikettensensor
WO2005082633A2 (en) Printing apparatus with bar code sensor
AU696779B2 (en) Method and devices for checking security documents
KR101133900B1 (ko) 잉크리본카세트 및 프린터
GB1332872A (en) Detecting the end of a roll of web material
US20100315259A1 (en) Position determining system
US20030155388A1 (en) Method of detecting plastics articles, and a detector device
WO2001010723A1 (en) Apparatus and method for detecting labels
JPH02152857A (ja) シート体のピッチ計測方法及びその装置
KR100307334B1 (ko) 시트형상체의 흠집 검출장치
US20090080918A1 (en) Media elevator's current position identification method and a media handling device arranged with the same
JPS6231654A (ja) 終端近接検出方式
JP2003118904A (ja) プリンタ用ロール紙の残量検出装置
JPH0425148B2 (de)
JPH01262173A (ja) プリンタ装置
JPH0696301B2 (ja) プリンタ制御回路
JPH11120516A (ja) 磁気センサ
JPH06135624A (ja) 印刷用材料の終了時検出方法およびそれに使用する材料

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19980107

17Q First examination report despatched

Effective date: 19980427

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19981110