JPH08276571A - Method and system to determine final end of cloth roll whichis used for blanket cylinder of press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel and improved system for cleaning the cylinder of a printer. SOLUTION: At least one and substantially opaque non-contact medium target indication 20 is provided on the cleaning medium C of a cylinder. Further, on a cleaning medium feed roll core 6, at least one and substantially opaque non-contact core target indication is provided so as to detect target indications with at least one non-contact sensing means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in cleaning cylinders of printing machines. In particular, the invention involves changing the use from the end of the fabric to a first set distance, changing the use to a second position proximate to the end of the fabric and cleaning the use on the fabric roll in cleaning the cylinder of the printing press. A method and system for changing to a third position on a wash fabric supply roll.

[0002]

It is known in the printing industry that the cylinders of lithographic printing machines, and in particular blanket cylinders, must be cleaned from time to time for various reasons at the end of or during the operation of the printing press. Conventionally, as a means of achieving this, US Pat. No. 4,344,361.
It is also known that some have an automatic cleaning device utilizing the cleaning fabric described in the specification. As shown in that patent, there are cleaning fabric supply rolls and cleaning fabric take-up rolls. The blanket cylinder is located between the supply roll and the take-up roll. US Patent No. 4,
As described in Japanese Patent No. 344,361, there is an advancing means for advancing the cleaning cloth from the cloth supply roll to the cloth take-up roll. The advancing means is preferably of a type capable of advancing essentially the same amount of cloth regardless of the diameter of the cloth left on the cloth supply or the cloth winding roll.

According to the automatic blanket cleaning system described in the above-mentioned patent specification, the inflatable bag mechanism is periodically used, and the cleaning cloth is engaged with the blanket cylinder,
The blanket cylinder is cleaned with water and / or solvent that is directed onto the cleaning fabric.

The automatic blanket cleaning apparatus described in the above patent specification has been successfully marketed. The commercially available ones have been combined with switch means to indicate to the operator when the fabric on the fabric supply roll is near the end and when the fabric supply roll is empty. For this purpose, an automatic blanket cylinder washer is used with a limit switch, which determines and detects the diameter of the fabric on the fabric supply roll, which allows the length of the fabric to be estimated. Therefore, the straight length of the fabric left on the roll can be estimated by determining the diameter of the fabric left on the roll. The switch or sensor is of a visual and / or audible signal that signals the operator when the fabric is near the end of its supply and when there is no more fabric to be supplied. Despite some limitations on the accuracy and repeatability of such systems, alarm systems of the type described above have been used successfully.

One problem with diameter-sensing type alarm systems is that the amount of straight line left in the fabric is only estimated.
It is not directly measured and determined. The remaining straight line length can be roughly calculated mathematically, but since the diameter itself is not determined with the accuracy required for accurate measurement of the fabric length, it can be determined with high accuracy. You cannot do it. In addition, the accuracy of measuring the diameter changes the diameter of the cardboard core, the accuracy of the holes in which the shaft is placed in the frame and other size changes that occur in the manufacture of the parts and elements that make up the fabric feed and fabric take-up feed mechanism. Limited by For these reasons, the mechanism for estimating the length of fabric left in the fabric source is inaccurate by one yard or more. A one-yard wash cloth is important in the cost-conscious printing industry.

In general, the fabric supply roll can be used for approximately 250 washes in a web press and approximately 12 yards of fabric that can be used in a sheet-fed press for approximately 125 washes, or wash media. Consists of. An operator who works for eight hours makes 2 to 15 washes. Therefore, cleaning the blanket cylinder only requires approximately 2 to 6 inches of cleaning media. For this reason, 3 feet of cleaning media can be used for a significant number of washes. It is an object of the invention to utilize as much cleaning medium as possible for cleaning and to avoid wasting cleaning medium.

The inaccuracy of using an estimator system to determine the length of cleaning media left causes media waste,
Excessive wear of the cylinder can occur when there is no cleaning medium in contact with the cylinder. Therefore, when the inflatable bag type system engages the cleaning medium with the blanket system, the cleaning medium supply length is not accurately determined,
When the bag engages the cylinder rather than the fabric, the cylinder can become significantly worn and damaged.

Here, the term fabric refers to US Pat.
Used in the specification of 344,361,
It will be appreciated that it includes other types of suitable fabric or paper materials used in cleaning press cylinders. The term medium is generic and refers to all known cleaning materials and is not limited to those mentioned above.

There are numerous prior art patents that determine the end of material unwound from a winding core.

US Pat. No. 3,449,733 relates to a device in which the material wound on the spool is magnetic or magnetizable. The recording head records the information of the material to be processed (similar to a tape recorder). This information is used by the sensing head to determine the end of the spool,
Control the action of other machines.

US Pat. No. 3,990,625 relates to an automatic bagging device which uses preformed holes in a plastic web to indicate the end of the bag. Detection is done by spring fingers fitted in the holes. It is also described in this patent specification to use other types of materials such as opaque spots or lines that are photoelectrically or capacitively detected.

US Pat. No. 3,146,431 describes a patch of conductive material, an opening strip for use in a cigarette pack applied to the end of a web. The web is unwound through a sensor consisting of two conductive bushes, which when the conductive material contacts both bushes forms an electrical circuit. This displays the end of the web to the machine operator.

US Pat. No. 3,184,177 describes holes or opaque patches or transparent patches on the filmstrip that precisely position the frame. The position of the frame is detected by the two photocells.

US Pat. No. 3,542,304 describes two conductive rollers for detecting metal particles embedded in a fabric web. The particles can be removed before they damage the fabric.

US Pat. No. 3,568,584 describes a self-winding mechanism for a camera that detects film position through contacts and conductive material on the film. The conductive material is configured to create a regularly spaced discontinuity. Then, these discontinuities are detected. This patent specification describes holes in the film that are detected by spring fingers that operate electrical contacts.

US Pat. No. 4,115,013 describes a photodetector for detecting the end of the ribbon of a printer. A reflective material is attached to the ribbon.

US Pat. No. 4,212,552 describes a conductive material applied to the ribbon of a printer. When two contact fingers contact the unwound ribbon and the conductive material contacts both contacts, an electrical circuit is thereby formed. This provides the ribbon end signal to the printer.

US Pat. No. 2,821,284 describes a conductive tape or foil attached to a carbon paper web and detected by two conductive rolls. As the foil passes between the two rollers, an electrical signal drives the alarm device.

[0019]

SUMMARY OF THE INVENTION In view of the above,
It is an object of the present invention to provide a new and improved system for cleaning the cylinders of a printing press.

Another object is to provide a new and improved system for cleaning a press cylinder that determines the end of a media supply roll.

Another object is to provide a cleaning medium of a printing press cylinder cleaning device having an indexing means on the medium and a cleaning means for detecting the cleaning medium and providing an operator with information on the cleaning medium.

Another object is to provide a process of detecting a target index on the media and alerting the operator of the press of the end of the supply media, informing the operator that a set length of media is left, It is to alert the operator that the end of the medium supplied is imminent.

Another object is to provide an indication on the wash media that can be detected by the sensor at the appropriate location so that the end of the media supply is indicated during the cylinder wash cycle.

Another object is the cleaning medium of a cylinder cleaning system, which is able to determine by a sensor means when the medium approaches its end and when the cleaning cycle should be stopped and the medium should be changed. To provide at least one indicator at a set distance from the end of the.

Another object is to provide a detection method used in a printing machine suitable for detecting the end of a cleaning medium supply cycle roll.

Another object is to provide at least one indicator on the wash media supply roll core or shaft which can determine by the sensor means when the media leaves the core or shaft and the wash cycle should be stopped. To do.

[0027]

SUMMARY OF THE INVENTION Briefly stated, the present invention relates to cleaning cylinders of printing presses, and in particular blanket cylinders, wherein an index is applied to a non-metal, non-magnetic cloth type cleaning media material. , Or connected so that the index can be detected by another element and / or mechanism at an appropriate proximity position. The index is placed on the cleaning medium at a set position on the medium and is oriented according to the information sought. The present invention relates to the positioning and detection of a selected index in an appropriate position for the purpose of alerting the operator of the upcoming end of the media source and actually ending the cleaning cycle at the end of the media source.

The index may be made of a non-metal, a metal, a ferrous or a non-ferrous material (aluminum foil, mercury, etc.) arranged on the non-magnetic cleaning medium by any suitable method. The indicia may consist of strips or stripes of paint longitudinally or laterally arranged on the medium, for example a black stripe, and there may be one or more such indicia. The indicia may be placed on the media by adhesive tape, weaving, painting, inking or any other suitable method.

Depending on the type of indicator deposited on the cleaning medium, suitable detection means are provided for detecting the presence of the indicator. The detection means may be of the metal, non-ferrous material, magnetic field, capacitance and light responsive type, which does not require the sensor to be actuated by contact between the sensor and the indicator.

The invention may make use of the visible and / or infrared type photoelectric principle. In this case, the present invention may be of retroreflection detection type, diffuse infrared detection type, diffuse visible light detection type, and fixed focus detection type. This type requires that the difference in the light level of the indicator with respect to the light level of the medium is sufficient and that the sensor be able to detect changes in the amount of light it receives. This type can utilize visible light or infrared light.

The present invention also includes placing at least one target indicator on the cleaning media supply roll core to indicate that no cleaning media is left on the roll.
The automatic cylinder cleaning device or printing machine may be stopped when detected.

[0032]

Embodiments of the present invention will be described below.

Referring to FIGS. 1-3, there is shown one in which the present invention may be used, these drawings corresponding to FIGS. 1-3 of US Pat. No. 4,344,361. It will be appreciated that this invention is not limited to use in the particular construction of the blanket cleaning device, which is exemplary only.

As shown in FIGS. 1 to 3, the cylinder 2, the medium take-up roll 4 and the medium supply roll core 6 are attached to the fixed side frame 8. The cleaning medium C is sent from the medium supply roll core 6 to the medium winding roll 4 and pulled out. The purpose of the medium C is to clean the cylinder 2. To this end, the inflatable bladder member 38 is inflated and engages the media C to engage the media in a selected manner in the cylinder by a suitable mechanism described in US Pat. No. 4,344,361. To meet. It will be appreciated that the media engagement means is not limited to inflatable bladder means.

Cleaning medium C has a uniform absorbency for water and solvents and is as described in US Pat. No. 4,344,361. The medium is non-metallic and non-magnetic, and is preferably provided with indicia of some form or shape of a piece of metal, non-ferrous material and / or magnetic material or paint or ink.

FIG. 4 shows the medium roll 4, the indexing means on the medium C and the sensor on the support member for detecting the indexing means. The sensor S is arranged so that the index on the cleaning medium C can be detected. The target index on the cleaning medium C is the medium target index. The sensor is of the type known to date, of the type that does not require contact in response to metals, non-ferrous materials, magnetic fields or capacitance.

Referring to FIG. 5, there is shown a roll end of the cleaning medium C and an index 20 on the medium located a set distance from the roll end. The indicator may be magnetic tape, metal, non-ferrous and / or magnetic tape, metallic paint, paint or ink, inductive,
Its presence can be detected by a commercially available sensor such as a capacitive type, an electromagnetic type, or a photoelectric type.

The index on the medium may be a metal, a non-ferrous material, a metal tape, a non-ferrous tape, an electrically conductive paint, a metal paint, which can be applied or adhered to the medium of the medium source by any suitable method. It may consist of paint or ink, or other type of metal member. In other embodiments, the indicator may be black or other dark paint or dark ink.

The indicator may be attached to the medium by, for example, an adhesive, tape threads, weaving or any other suitable method.

As shown in FIG. 5A, there may be one or more indicators on the media depending on the desired sequence of action. For example, a first target indicator 22 that alerts the operator that the end of the media is near, and a second target that alerts the operator that the supply of media has ended, the cleaning cycle has ended, and the cylinder must not wear out. An index 26 can be provided.
In another embodiment, the second indicator 26 alerts when the end of the media supply is approaching.

FIG. 5A shows a plurality of target indexes at each set position. This is an embodiment where the operator does not need to know the exact location of the target indicia on the media.
A single target indicator can also be used for each set position, provided that the target indicator can be aligned with the sensor means.

The signal may be visual and / or audible.

The target indicator can be placed on the cleaning medium at first and second set distances from the end of the medium. The first set distance can be determined by multiplying the length of the medium required for each wash by the number of washes the operator wishes to be aware of before the end of the wash medium. The second set distance may be any distance as long as the operator can stop the cleaning work and prevent damage to the cylinder. The set position may be a distance selected by the user.

Referring to FIG. 6, another embodiment is shown. In this embodiment, a single index target stripe or strip extending along the length of the cleaning medium is used.

In this embodiment, the target indicator 24 has a front end 28 and a rear end 30. In this embodiment, the front end 28 of the target indicator is in the first set position for signaling the start of the cleaning medium end, and the rear end 30 signals the actual end of the cleaning medium. In another embodiment, the trailing edge 30 alerts the end of the cleaning media roll is approaching. When the front end is detected by a sensor means of a type similar to that shown in FIG. 5, it causes an alarm signal, and when the rear end 30 is detected by the sensor, it signals the end.

In the present invention, the first target indicator informs the operator that only the set length of cleaning medium is left on the fabric supply roll. Thus, the operator knows that there is only a certain amount of fabric for cleaning and can schedule work changes. On the other hand, in the second target index, when the cleaning medium reaches its end,
Alternatively, when approaching the end, another alarm signal may be generated and the operator may shut down the press cylinder washer to prevent damage such as cylinder wear.

As described above, the target index is metal,
It may be non-ferrous, electrically conductive paint and / or metal or non-metal dark paint or ink. If a metal indicator is used, it can be used with a microswitch such as PK87592 commercially available from Honeywell Division. Microswitch is made of iron or 0.0005-0.00
It may be a proximity sensor operated by a non-ferrous metal foil with a thickness in the range of 2 inches. In the case of such a proximity sensor, actual contact is not required, and a moving target can be detected without physical contact or magnetic attraction between the sensor and the target.

In the case of this type of target and sensor, an electromagnetic field is generated by the coil on the sensor surface. Eddy currents occur when this field is absorbed by the index target. This imparts a reflective load to the sensor's oscillator, reducing its signal level. The integrator circuit amplifies this change in signal level, which drives the Schmitt trigger. A trigger signal is sent to the output transistor, which produces a digital output.

In another embodiment, a magnetic index or target is provided that requires a sensor that responds to magnetic forces.
For this purpose, there is a 400SR sensor available from Honeywell Divijun. This is 6-16VD
A low cost solid state Hall effect sensor that is magnetically operated by a C power supply.

There are numerous other types of indicators for implementing the invention. It includes, but is not limited to:

Magnetic Ink Magnetic ink changes magnetically and displays a relatively low magnetic flux in a short time. These are for optical offset and water presses and must be heat cured before use.

Electronic Conducting Inks Although these inks have a high ohmic resistance, contact with water and / or moisture causes them to lose their conductivity and remove the ink.

Electronic Conductive Paints These paints have great conductive properties and are cost effective. However, due to the lack of high iron content, inductive sensors cannot detect these conductive paints. In addition, air / heat is required to dry these paints.

Conductive Graphite Resistant Coatings These materials have highly conductive properties and must be gelled and diluted in deionized water and mixed.

The capacitive sensor medium has a low dielectric constant,
Detection is extremely difficult.

Capacitive proximity sensor, in this case a dielectric material,
Sensors are used to detect metals, conductive materials, rubber, and glass, which are detected by their dielectric constant. The size of these sensors is large and the detection distance is based on the size of the detection head.

Inductive Proximity Sensor Accordingly, an embodiment of the inductive proximity sensor of the present invention is shown in FIGS.

FIG. 7 shows a media roll with guide type indicators.

As is known so far, the inductive type sensor operates as shown in FIG.

FIG. 10 shows the coil 30 and the ferrite core 32.
The inductive proximity sensor 29, oscillator 34, detector 36 and solid state output 38 are shown.
The oscillator 32 is for producing a high frequency field radiated from the coil in front of the sensor centered around the axis of the coil 30. The ferrite core bundles and guides the electromagnetic field forward.

The sensor 29 is arranged in the hole 35 of the support member 37 by some method (FIGS. 8 to 9). Figure 9
As shown in, the sensor is arranged to detect the end of the alarm strip indicator 22 and strip indicator or target 24 on the media supply roll.

The indicator is preferably an aluminum foil 31, but may be stainless steel, mercury, lead, brass or copper. In action, eddy currents are induced on the surface of the index when the index on the medium enters the high frequency field.
This causes energy loss in the oscillator circuit, causing vibration with a small amplitude. This change in amplitude produces a signal until the indicator leaves the detection area and the sensor returns to its normal state.

As is known, the preferred indicator material is aluminum foil approximately 0.002 inches thick. The distance between the aluminum foil and the sensor is about 0.
Precise detection is made when it is 250 inches and within a maximum detection distance of 0.250 inches. It is preferable to keep the medium under tension and to obtain reliable results. This type is not affected by air dust or other pollutants.

The other type is based on the principle of photoelectric detection in which light energy travels in the state of being concentrated in space, that is, as photons. Photons strike the surface of the index, producing photoelectrons. The energy of the photoelectrons causes a current to be generated in a manner that has been heretofore understood. This current causes a light or other visible or audible alarm.

Generally, the optical system of a photoelectric sensor is
It is in one of three basic detection modes in which visible or infrared light can be used. These are classified into a facing type, a retroreflective type, and a proximity type. Photoelectric proximity mode is subdivided into diffuse proximity type, divergent beam proximity type, focused beam proximity type and background suspension proximity type.

Retroreflective Detection In this form, the index is a reflective target on the media roll and the detector detects the reflective surface on the index. The reflective index target returns the light along the same optical axis. The reflection distance is preferably chosen so that it does not exceed the minimum required distance of 0.6 inches.

Diffuse Infrared Detection The embodiment of the invention shown in FIGS. 11-14 is a diffuse where the sensor detects a substantially opaque indicator such as matte black paint or ink stripe 40 on the media supply roll. It is an infrared detection type. The width of the black stripe is about 1
/ 2 to 2 inches, preferably 1 to 2 inches. In an embodiment having first and second target indicators, the first target indicator is a 1 inch black stripe and the second target indicator is a 2 inch black stripe. Both stripes are preferably arranged over substantially the entire width of the cleaning medium. In use, infrared or visible light impinges on the surface of the indicator, light is diffused by the surface at all angles, and a small amount of light is reflected along the optical axis. The sensing distance in the preferred embodiment is approximately 0.80 inches. The density of the stripes determines the detectability of the black stripes relative to the ground color of the light-colored medium, and a relatively large contrast difference is required to achieve it in a dusty, polluted atmosphere. Higher concentrations should be used to ensure accurate detection. When measured by the standard concentration method, the concentration is preferably about 0.14. The concentration range may be approximately 0.9-1.5.

FIG. 11 shows a painted or inked black stripe 40 on a cleaning media roll. There are two full medium width stripes shown in FIG. FIG. 13 shows sensors for media rolls and indicators.

In the preferred embodiment, the Minneapolis Banner Engineering Corporation low profile diffuse proximity sensor model no. 05-Q08-A
N7-V11131 can be used. Because the dark indicator is in the passage, it is accomplished by a sensor of the appropriate mode of operation of "dark on" when the sensor does not use reflection of light from the medium.

The diffusion proximity sensor of the low profile infrared sensor of the banner Q08 series sensor and the metal housing are attached to the frame member 46 by the screw means 48 (FIGS. 12 and 13) on the hole of the L-shaped support member adjacent to the medium supply roll. It is installed. As shown in FIG. 13, the media has two black stripes of the type described above, one of which is the warning stripe and the other is the end stripe of the fabric.

When the black stripe is within range of the sensor, the sensor will sound, display and control appropriate alarms.

Referring to FIG. 14, a conventional optoelectronic device capable of producing a signal and / or alarm is shown. Therefore, the cleaning medium C has the black stripes 22 painted or inked on it.
Have indicators such as. Light is provided by an appropriate light source, and the photoelectric detection device 50 is arranged so as to receive reflected light. As indicated by the dotted line, the light difference produces an electrical signal that is sent to a comparator 52 having a reference threshold, which activates a visible, audible or other type of alarm 54.

Diffuse Visible Detection The embodiment of the present invention is of the Diffuse Visible Detection type where a sensor detects black paint or ink stripes on the media roll.

In this case, visible light impinges on the surface of the black stripe due to the same physical structure as in FIGS. Light is diffused by the surface at all angles, some of which is reflected along the optical axis. In this case, the detector distance is 0.6 when there is no dust or debris on the lens.
.About.0.8 inches, with a detection distance of approximately 0.5 inches when there is cornstarch or other debris on the lens. The contrast of black and white is very high and the sensor can distinguish between light and paint or ink so that it can detect black stripes on the media roll even if the black stripes are not dense. In the preferred embodiment, the first target index is a 1 inch stripe and the second target index is a 2 inch stripe that extends substantially across the width of the cleaning medium C.

Fixed Focus Detection This embodiment is a fixed focus focused beam detection system in which the focus of the bright color beam detection area is selected at a fixed distance in front of the detection controller. This concentrates the power in one area, improving reliability and accuracy. The high color contrast allows the sensor to distinguish between light and dark paint stripes. This form uses visible light rather than infrared.

Cleaning Medium Supply Roll Core A cleaning medium is wound around a cleaning medium supply roll core or shaft 60. The cleaning medium supply roll core 60 is made of cardboard, but may be made of any other suitable material. In a preferred embodiment, at least one target indicator 6
2 is disposed on the cleaning medium roll core 60. This target 62 is a core target index. This is preferably done by black painting or inking the cleaning media supply roll core 60. In some embodiments, only a portion of the cleaning media supply roll core 60 is black. In another embodiment,
Another type of the above-described target index is arranged on the cleaning medium supply roll core 60. As shown in FIG. 15, the core target index arranged on the cleaning medium supply roll core 60 is detected by the sensor means.
The same sensor means or different sensor means may be used depending on the type of target indicator placed on both the cleaning medium C and the cleaning medium supply roll core 60 to detect different target indicators.

In the preferred embodiment, the target indicator located on the wash media supply roll core is used as an emergency detector at the end of the media. If for some reason the sensor means does not detect the first or second target indicator, the sensor means detects the target indicator on the wash media supply roll core 60 and issues a signal or alarm at the end of the media. Therefore, in the case of the target index on the cleaning medium supply roll core, there is a problem that the operator receives the medium end signal without receiving the small amount medium signal.

In other embodiments, only one media target indicator 65 may be placed on the cleaning media indicating that only a small amount of media is left, while the core target index 62 is left with media. You may display that there is no. Such a system can reduce costs because there is no need to place the second target indicator on the cleaning medium. Before the cleaning medium C is completely removed from the cleaning medium supply roll core 65, in order to prevent damage to the cylinder cleaning system when no medium is used,
It is preferred that the sensor means detect the core target indicator 62. This can be accomplished in various ways.
Two examples are given.

In the first example shown in FIG. 16, the medium target index 65 is located approximately 24 inches from the end of the medium. Before the cleaning media C is wound onto the cleaning media supply roll core 60, the cleaning media C is folded over the last 12 inches of the cleaning media at an angle of substantially 45 ° on both sides. The sensor means S detects the core target index and gives a warning of no medium, i.e. the end of the medium.

In the second example shown in FIG. 17, instead of bending the end of the cleaning medium C, a part of the cleaning medium C is cut off from both sides of the cleaning medium C at a position close to the end of the cleaning medium. The sensor target S detects the core target index. In the last approximately 12 inches of cleaning medium C, approximately 6-12 inches from both sides of cleaning medium C are preferably excised.

As shown in FIG. 18, the cleaning medium C
Is not required to be detected by the sensor means S until the core target 62 index is completely removed from the cleaning medium supply roll 60.

In another embodiment, the second sensor means S detects the core target index. Second sensor means S
The advantage of is that upon detection of the core target indicator, in addition to an audible or visual alarm, the second sensor means shuts down the cylinder cleaning system and / or the printing press to prevent its damage. In the embodiments of the system described above, various types of target indicators are located on the cleaning medium C rather than the cleaning medium supply roll core 60. In another embodiment, where similar types of target indicators are placed on the cleaning medium C and the cleaning medium supply roll core 60, the first sensor means detects the core target indicators, as shown in FIGS. 4 and 9. The second sensor means must be positioned so that it does not detect the media target index, such as the target index shown in FIGS. 5A and 6A.

Various modifications of the present invention are possible.

[Brief description of drawings]

FIG. 1 is a perspective view of an automatic blanket cleaning device of the type in which the present invention can be used.

FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1 showing the cleaning medium spaced from the uninflated inflation bag and cinder.

FIG. 3 is a cross-sectional view similar to FIG. 2, showing an inflatable bag and a cleaning medium engaged with a cylinder.

FIG. 4 is an explanatory diagram showing a relationship between an index and a sensor means.

FIG. 5 is an explanatory view showing indexes arranged at a plurality of intervals on the medium of the present invention, and A is an explanatory view showing other indexes.

FIG. 6 is an explanatory diagram showing indexes in the length direction of the medium.

FIG. 7 is a perspective view of a media roll having an aluminum strip indicator of the present invention.

FIG. 8 is a partial sectional cutaway view showing an inductive sensor.

FIG. 9 is an explanatory diagram showing a relationship between an inductive sensor and a medium roll having an index.

FIG. 10 is a block diagram of a sensor.

FIG. 11 is a perspective view of the media roll of the present invention having an index consisting of black stripes.

FIG. 12 is a partially cutaway view showing a mounted state of visible light or infrared sensor means.

FIG. 13 is an explanatory diagram showing a relationship between a visible light or infrared sensor means and a medium roll having an index.

FIG. 14 is an explanatory diagram of a photoelectric sensor circuit.

FIG. 15 is an explanatory diagram showing a relationship between a sensor, a medium roll having an index, and a cleaning medium supply roll core having an index.

FIG. 16 is an explanatory diagram showing a target index, a black cleaning medium supply roll, and a folded cleaning medium.

FIG. 17 is an explanatory diagram showing a target index, a black cleaning medium supply roll, and the removed cleaning medium.

FIG. 18 is an explanatory diagram showing a target index, a black cleaning medium supply roll core, and a full width cleaning medium.

[Explanation of symbols]

 2 cylinder 4 medium take-up roll 6 medium supply roll core 20 index C cleaning medium S sensor means

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Walter H, Kano 06610, Connecticut, USA, 06610, Bridgeport, Asylum Street 65 (72) Inventor Alan Ev, Barney, Connecticut, USA 06801, Bethel, Maple Avenue Exhibition 45 (72) Inventor Arnold M, Heightman, South Street, Fairfield, Connecticut 06430, USA 26 26

Claims (50)

[Claims] 1. A cylinder of a type adapted to advance a cleaning medium from a medium supply roll core to a medium take-up roll core and to engage the cleaning medium with a cylinder disposed between the medium take-up roll core and the medium supply roll core. A method of determining the end of a cleaning medium used to clean a cylinder of a printing press having a cleaning system, the method comprising: (a) providing a non-metallic, non-magnetic medium that absorbs both water and solvent; Providing at least one substantially opaque non-contact medium target indicator of a type detectable on the medium by non-contact sensor means, said at least one target indicator being at least 1 on said cleaning medium;
(C) providing at least one substantially opaque non-contact core target indicator of a type that can be detected by non-contact sensor means on the cleaning medium supply roll core; d) providing at least one non-contact sensor means capable of responding to and informing the response of the target index when detecting the target index, the non-contact sensor means responding to the detection of the target index. , A method for generating a signal. 2. The medium target indicator is located at a first position having a first distance selected by the user from the end of the cleaning medium and a second position having a second distance selected by the user from the end of the cleaning medium. Disposed, the sensor detects the media target indicator at the first position from the end of the cleaning medium, signals the end start of the cleaning medium, and detects the medium target indicator at the second position, The signal of the end of the cleaning medium is signaled.
The method described in. 3. The medium target index is located at the first position selected by the user according to the length of the medium required for cleaning the user-selected number of times. The method described. 4. The method of claim 2, wherein the media target indicator is located at the user-selected second position near the end of the media. 5. The method of claim 1, wherein the at least one media target index is a single target index consisting of strips. 6. The method of claim 1, wherein the media target indicator is a metallic material. 7. The method of claim 6, wherein the metallic material is metallic paint. 8. The method of claim 6, wherein the metallic material is a magnetic material. 9. The method of claim 6, wherein the metallic material is formed of a magnetic paint material. 10. The method of claim 1, wherein the media target index is formed of a non-ferrous material. 11. The method of claim 1, wherein the media target indicator is formed of electrically conductive paint. 12. The method of claim 1, wherein the media target indicator is a dark stripe on the media. 13. The method of claim 1, wherein the media target index is of the same type as the core target index. 14. The method of claim 1, wherein the media target index is of a different type than the core target index. 15. The method of claim 1, wherein the core target indicator comprises black paint. 16. The method of claim 1, wherein the at least one sensor means comprises first sensor means for detecting the media target indicator and second sensor means for detecting the core target indicator. 17. The step of preventing use of the cylinder cleaning system when the second sensor means detects the core target indicator.
The method described in. 18. A cleaning medium travels from a media supply roll core to a media take-up roll core, the cleaning medium engages a cylinder located between the media take-up roll core and the media supply roll core, and both water and solvent. A cylinder cleaning device for determining the end of a cleaning medium used for cleaning a cylinder of a printing press having a cylinder cleaning system of a type having a non-metallic, non-magnetic medium that absorbs (a) at least one non-contact sensor At least one substantially opaque non-contact medium target indicator means located at a user-selected position on the cleaning medium that can be detected by means; and (b) detected by the at least one non-contact sensor means. At least one substantially opaque non-contacting core disposed on the media supply roll core (C) the at least one non-contact sensor means is arranged at a distance from the target indicator means on the cylinder cleaning device, and the cleaning medium is wound around the medium winding roll core. At this time, the target index means is detected at various distances of at least one non-contact sensor means with respect to the target index means, and (d) when the medium target index means is detected, the at least one non-contact sensor means is A signal is generated to signal the response of the non-contact sensor and when the non-contact sensor responds to the media target indicator means at the user selected position of the media, (e) disposed on the media supply roll core. When the core target index means is detected, the at least 1
Apparatus, wherein one non-contact sensor means signals the response of the non-contact sensor, and when the at least one non-contact sensor means responds to the core target indicator means, an end signal of the medium is generated. 19. The at least one medium target indicator means is disposed on the medium at a user-selected first position from the end of the cleaning medium and a user-selected second position from the end of the cleaning medium. , The at least one sensor means detects the target indicator at the first position, signals a small amount of cleaning medium, detects the target indicator at the second position, and signals the end of the cleaning medium. 19. The device according to claim 18, characterized in that 20. The apparatus of claim 19, wherein the first position is selected according to a length of the medium required for a user-selected number of cleanings. 21. The apparatus of claim 20, wherein the second position is near the end of the medium. 22. The apparatus of claim 18, wherein the at least one media target indicator means is a single target indicator consisting of a strip. 23. The at least one medium target indicator means is a metallic material.
An apparatus according to claim 1. 24. The device of claim 23, wherein the metallic material is metallic paint. 25. The device of claim 23, wherein the metallic material is a magnetic material. 26. The device of claim 23, wherein the metallic material is a magnetic paint material. 27. The apparatus of claim 18, wherein the at least one media target indicator means is made of a non-ferrous material. 28. The apparatus of claim 18, wherein the at least one media target indicator means is formed of electrically conductive paint. 29. The apparatus of claim 18, wherein the at least one media target indicator means is formed as a color stripe on the media. 30. The apparatus of claim 18, wherein the media target indexing means is of substantially the same type as the core target indexing means. 31. The apparatus of claim 18, wherein the media target indexing means is of a different type than the core target indexing means. 32. The apparatus of claim 18, wherein the core target indicator means comprises black paint. 33. The at least one sensor means includes first sensor means for notifying a response when the medium target indicator means is detected, and second sensor means for notifying a response when the core target indicator means is detected. 19. The device according to claim 18, wherein: 34. The apparatus according to claim 18, further comprising means for stopping the cylinder cleaning device when the core target indicating means is detected. 35. A cylinder cleaning device having a cleaning medium take-up roll, comprising: (a) a non-metal, non-magnetic cleaning medium, and (b) at least one disposed on a position selected by a user on the medium. Two substantially opaque non-contact media target indicia, the non-contact media target indicia having a color substantially different from the media; An opaque non-contact core target indicator, and (d) at least one diffuse detection device that senses light in the visible or infrared spectrum spaced from the non-contact medium target indicator on the cylinder cleaning device. Wherein the at least one diffusion detection device comprises the non-contact media target indicator when the media is wound on the media take-up roll. Detecting the non-contact medium target indicator on the medium at various distances to the detection device, the at least one diffusion detection device being spaced from the cleaning medium supply roll core and the cleaning medium being the medium. Detecting the non-contact core target indicator on the cleaning medium supply roll core when wound on a take-up roll, and (e) wherein the at least one diffusion detection device detects a light level A means for detecting the difference and signaling it when an electrical change is generated, and (f) when the at least one diffusion detection device detects the core target indicator and causes an electrical change,
A cylinder cleaning device, characterized in that it is provided with means for notifying it by a signal. 36. The non-contact medium target indicator has a color that is substantially different from the cleaning medium, and the non-contact core target indicator comprises a black coating on the cleaning medium supply roll core.
5. The device according to item 5. 37. The non-contact medium target indicator is a color paint substantially different from the cleaning medium, and the diffusion detection device is of a diffuse visible light detection type. apparatus. 38. The apparatus of claim 35, wherein the non-contact core target indicator comprises black paint. 39. A cylinder cleaning device having a cleaning medium take-up roll core and a cleaning medium supply roll core, comprising: (a) a non-metal, non-magnetic cleaning medium; and (b) a position on the medium selected by a user. At least one substantially opaque non-contact media target indicator disposed therein, the non-contact media target indicator having a color substantially different from the cleaning medium, and (c) disposed on the cleaning medium supply roll core. And at least one photoelectric detection device spaced apart from the non-contact indicator of the cylinder cleaning device, the non-contact medium target comprising: Detecting the media target index at various distances of the detection device to the index, the at least one photoelectric detection device comprising: (E) The at least one detection device detects a difference in light level between the medium and the non-contact medium target index, and causes an electrical change. (F) the means has a means for signaling when the at least one detection device detects the core target indicator and causes an electrical change. Cylinder cleaning device. 40. A cleaning medium advances from a medium supply roll core to a medium take-up roll core, the cleaning medium engages a cylinder located between the medium take-up roll core and the medium supply roll core, and both water and solvent A cylinder cleaning device for determining an end of a cleaning medium used for cleaning a cylinder of a printing machine of a type having a constant light level of non-metallic, non-magnetic medium, which absorbs (a) at least one non-contact sensor Comprising at least one substantially opaque non-contact medium target indicator means located at a user-selected position on said medium that can be detected by means, said non-contact medium target indicator means being different from said medium. (B) at least one substantially opaque non-contact disposed on the cleaning media supply roll core. (C) the at least one non-contact sensor means is spaced from the non-contact target index means of the cylinder cleaning device, and the at least one non-contact sensor means is When wound on the media take-up roll, may be responsive to the optical contrast level of the non-contact media target index means with various distances of the at least one non-contact sensor means to the non-contact media target index means; Said non-contact sensor means may be responsive to said non-contact core target indicating means, and (d) said at least one non-contact sensor means at said at least one upon detecting the optical contrast level of said non-contact medium target indicating means. Signaling the response of one non-contact sensor, said at least A signal is generated when one non-contact sensor responds to the non-contact target indicating means at the user-selected position, and upon detection of the non-contact core target indicating means, the at least one non-contact sensor means is A cylinder cleaning device characterized in that a signal is generated when the response is notified and the at least one non-contact sensor means responds to the warfare core target indicator means. 41. The blanket cleaning apparatus according to claim 40, wherein the non-contact medium target indicating means is oriented along the length direction of the medium. 42. The blanket cleaning device according to claim 18, wherein the non-contact medium target indicating means is oriented along the length direction of the medium. 43. The blanket cleaning device of claim 18, wherein the non-contact media target indexing means is formed as a plurality of unconnected indexes located across the width of the media. 44. The blanket cleaning apparatus of claim 31, wherein the non-contact media target indexing means is formed as a plurality of unconnected indexes located across the width of the media. 45. The method of claim 6, wherein the metallic material is a magnetic ink material. 46. The method of claim 7, wherein the core target indicator comprises black ink. 47. The method of claim 23, wherein the metallic material is a magnetic ink material. 48. The apparatus according to claim 18, wherein the core target index means is made of black ink. 49. The non-contact medium target indicator is a color ink having a color substantially different from that of the cleaning medium, and the diffusion detection device is of a diffuse visible light detection type. The device according to. 50. The apparatus of claim 35, wherein the non-contact core target index comprises black ink.