EP1195654A2 - Elément de transfert avec un manchon remplaçable et méthode l'utilisant - Google Patents

Elément de transfert avec un manchon remplaçable et méthode l'utilisant Download PDF

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Publication number
EP1195654A2
EP1195654A2 EP01122613A EP01122613A EP1195654A2 EP 1195654 A2 EP1195654 A2 EP 1195654A2 EP 01122613 A EP01122613 A EP 01122613A EP 01122613 A EP01122613 A EP 01122613A EP 1195654 A2 EP1195654 A2 EP 1195654A2
Authority
EP
European Patent Office
Prior art keywords
layer
core
sleeve
eine
intermediate transfer
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Withdrawn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
EP01122613A
Other languages
German (de)
English (en)
Other versions
EP1195654A3 (fr
Inventor
Robert Charlebois
Arun Chowdry
Craig M. Cody
Steven Cormier
Earl G. Gomes
Dennis Grabb
Diane M. Herrick
Joseph A. Pavlisko
Biao Tan
Thomas N. Tombs
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
NexPress Solutions LLC
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 Eastman Kodak Co, NexPress Solutions LLC filed Critical Eastman Kodak Co
Publication of EP1195654A2 publication Critical patent/EP1195654A2/fr
Publication of EP1195654A3 publication Critical patent/EP1195654A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/1605—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support
    • G03G15/162—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support details of the the intermediate support, e.g. chemical composition
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/01—Apparatus for electrophotographic processes for producing multicoloured copies
    • G03G2215/0103—Plural electrographic recording members
    • G03G2215/0119—Linear arrangement adjacent plural transfer points

Definitions

  • This invention relates to electrostatography and, more particularly, to a method and Device comprising an electrostatic transmission element provided with a sleeve Transfer of toner images to recording elements used.
  • a non-compliant intermediate transfer roller in one electrostatographic machine to transfer toner from an imaging element to a Transferring the receiving element is generally known and is described in commercial electrophotographic copiers and printers.
  • a toner image, that is formed on a first imaging element is formed in a first Transfer operation is transferred to an intermediate transfer roller and is then in a second transfer operation from the intermediate transfer roller transferred to a receiving element.
  • the second time a toner image is transferred from an intermediate transfer roller on a take-up element usually becomes a one Backing roller supporting paper receiver used, forming a pressure nip to press the take-up element against the intermediate transfer roller.
  • 5,701,567 disclose an intermediate transfer roller which Has electrodes that are embedded in a flexible cloth to the generated to control the electrical transmission field spatially.
  • Tombs and Benwood reveal in U.S. Patent No. 6,075,965 the use of a compliant Intermediate transfer roller in connection with a transport track in a multi-colored electrophotographic machine.
  • May and Tombs disclose in U.S. Patent No. 5,715,505 and in U.S. Patent No. 5,828,931, a compliant imaging element that includes a thick has a flexible cloth coated with a thin photoconductive material.
  • an offset intermediate transfer roller includes a portion that includes a has a slightly smaller diameter than the main body of the roller, so that a Cloth element can be slid along this narrower part until there is a spot reached, at which a series of holes in the roller allows one under pressure standing fluid, e.g. Compressed air to pass through the holes, causing the cloth element is stretched and it is allowed that the entire cloth element on the main body the roller is pushed.
  • the source of the compressed air or the pressurized fluid is shut off, whereby the cloth element can relax in a state of less stretch, whereby this stretch is sufficient so that the cloth element tightly embraces the roller.
  • An electrostatographic imaging element in the form of a removable replaceable endless imaging tape on a rigid roller is described by Yu et al. in the U.S. Patent No. 5,415,961.
  • the electrostatographic imaging element is included Means attached to the rigid roller and removed from the rigid roller which the Stretching the endless imaging belt with a pressurized fluid include.
  • An intermediate transfer roller that has a rigid core and a removable, interchangeable transfer sheet has been developed by Landa et al. in U.S. Patent No. 5,335,054 and by Gazit et al. in U.S. Patent No. 5,745,829, which is Transfer cloth is firmly and interchangeably attached and attached to the core.
  • the Transfer cloth for use in conjunction with a liquid developer Toning of a first image comprises a substantially rectangular sheet, which is mechanically held to the core by grippers.
  • the core (or drum) has depressions in which the grippers are located.
  • the present invention provides such an improved device and one improved procedure ready. Other advantages are shown in the following Description clear.
  • the aim of the invention is to provide an improved intermediate transfer roller which can be used in a multicolor electrostatographic device that parallel imaging stations and a paper conveyor belt are used.
  • the improved Intermediate transfer roller comprises an interchangeable sleeve member which is made by a cylindrical core member is removable if and if the sleeve member due to Wear and tear or damage must be replaced or become worn predetermined operating life. A new sleeve element can then be opened an expensive core element with small tolerances, where by maintaining the expensive core element for a long service life great cost savings is guaranteed.
  • the invention enables Removal or installation of a sleeve on the core element, so that the Core element remains attached to the electrostatographic device to which it is attached.
  • an intermediate transfer roller is used Use in an electrostatographic device provided the following Elements comprises: a substantially cylindrical core element, the Core element comprises a substantially cylindrical roller core which with or can be coated with multiple layers, one layer being a compliant Can be layer; an interchangeable sleeve member that is removable from the core member and includes an endless band that surrounds the core element and thus in a narrow Contact is established; wherein the sleeve member is supported on the sleeve by a sleeve attachment means Core element can be attached and from the core element through a Sleeve removal means can be removed, the sleeve member having a shape of a endless belt not only during the operation of the intermediate transfer roller maintains, but also during the attachment of the sleeve element on the Core element or during the removal of the sleeve element from the core element.
  • the invention can preferably be used for full color electrophotographic image processing are used using multi-color toner images, each colored toner image is formed on a first imaging element, in a first Transfer step is transferred to a transmission element and then in a second transfer step to a receiving means, e.g. Paper being transferred.
  • the first image is formed by electrostatography and a first one imaging element may be used which comprise a belt or a drum can.
  • the invention can also be in single color electrostatographic or multicolor Devices are used.
  • the image processing device that denoted by the numeral 500 has the form of an electrophotographic Image processing device and in particular a color image processing device in which the color separation images are formed in each of the four color modules and in the register a receiving element are transmitted when a receiving element through the Device is moved while being carried by a paper conveyor 516.
  • a paper conveyor belt is in US 6,016,415 and in the above No. 6,075,965 and.
  • the device has four color modules although this invention is applicable to one or two such modules.
  • modules 591 B, C, M and Y are of similar construction, except for the fact that, as shown, a paper conveyor belt 516 that is in the form of an endless belt can have, works with all modules and the receiving element from Paper conveyor belt 516 is transported from one module to another.
  • the elements in 9, which are similar from module to module, have similar reference numerals with a Addition of B, C, M and Y on, which refer to the color module with which it is in Connection is established, i.e. Black, cyan, magenta or yellow.
  • Three Recording elements or sheets 512a, b, c are shown which simultaneously show images of the various modules.
  • a fourth pickup element 512d is shown how it is transported by the paper conveyor belt 516 after having color toner images on it has received.
  • each Recording element can receive a color image from each module, and that in this Example up to four color images can be received by each recording element.
  • the movement of the receiving element with the paper conveyor belt 516 is such that each color image attached to the transfer printing nip of each module Transfer element is transferred to a transfer that is associated with the previous color transfer matches in register, so that a four-color image, that is formed on the receiving element, the colors in a register accurate superimposed relationship on the receiving element.
  • the Receiving elements are then serially detached from the paper conveyor belt and attached to one Fuserstation (not shown) sent to the images formed from dry toner to fuse or strengthen the receiving element.
  • the paper conveyor belt 516 is used for the prepared for reuse by supplying charge to both surfaces, e.g. using opposing corona charging stations 522, 523 which neutralize the load on the two surfaces of the paper conveyor belt 516.
  • Each color module includes a first imaging element, e.g. a drum or a first imaging roller, designated 503 B, C, M and Y, respectively.
  • each of the first imaging elements 503 B, C, M and Y has a photoconductive Surface on which a pigmented image from marking particles or a number is formed from different colored images from marking particles.
  • the outer surface of the first imaging elements becomes uniform from one first charging station such as a corona charger 505B, C, M and Y, respectively or other suitable charging stations, e.g. Roller charging stations Brush charging stations, etc. charged.
  • the uniformly charged surface is covered by suitable exposure means, e.g.
  • the electrostatic image is pigmented by applying Marking particles on the photoconductive drum carrying the latent image through a Development station 581B, C, M and Y developed.
  • the Development stations 581B, C, M and Y contain pigmented ones Toner marking particles of the corresponding assigned color. So everyone creates Module a series of images of different color from marking particles on the corresponding photoconductive drum. Instead of a photoconductive drum, the a photoconductive tape may be used.
  • Toner particle diameters between 6 and 8 micrometers are used.
  • a general The method used to improve toner transfer is the use of Toner particles with additives, including submicroscopic particles Silicon dioxide, aluminum oxide, titanium dioxide and the like that adhere to the surfaces of Toner particles (so-called surface additives) are attached or adhered.
  • surface additives which includes submicroscopic water repellent fumed silica but others Formulas that use submicroscopic particle area additives can also be used to be useful.
  • Each marker particle image formed on a corresponding PIFR is in a transfer pressure nip to an outer surface of a corresponding second or intermediate image transfer element, e.g. one Intermediate transfer roller, designated 508 B, C, M and Y, respectively
  • the toner image is transferred by a suitable cleaning device 504 B, C, M or Y from the surface of the photoconductive drum to the Surface for re-use to form subsequent images prepare.
  • the lengths of the PIFRs and intermediate transfer rolls shown here are generally larger than the widest pick-up sheet by one Receive image.
  • the intermediate transfer roller includes a core member 541B, C, M, and Y, respectively, and an interchangeable removable sleeve member 542B, C, M, and Y, respectively.
  • a core member preferably remains attached to the frame of device 500 when a sleeve member is removed from the core member or when a sleeve member is attached to a core element.
  • the core element 541 B, C, M and Y comprises a rigid roller core (not separately identified) which has a substantially cylindrical section.
  • the cylindrical portion of a roll core includes an outer surface that has a substantially cylindrical appearance. However, a cylindrical portion of a roll core is generally not solid throughout, but may have a hollow tube or internal structures, e.g. B.
  • a roller core is preferably made of metal (such as aluminum).
  • the core member 541 B, C, M, and Y may also include one or more layers (not separately identified) that surround the roll core, wherein one of the layers may be a compliant layer.
  • the essentially cylindrical section of the roll core is subject to low tolerances and is manufactured with precision, the non-uniformity preferably being less than 80 micrometers and in particular less than 20 micrometers.
  • the non-uniformity is defined here as the maximum radius measured from the axis of rotation of the roller core minus the minimum radius from the axis of rotation of the roller core, as measured over the entire operational length of the essentially cylindrical section of the roller core.
  • the sleeve member 542 B, C, M or Y comprises one or more resilient elastomeric layers (not separately identified) or comprises a non-resilient layer.
  • a compliant layer as used herein, has a modulus of elasticity that is less than about 50 MPa (50 x 10 6 Newtons / m 2 ), and a non-compliant layer, as used herein, has a modulus of elasticity that is greater than about 50 Is MPa.
  • a compliant sheet layer which may be contained either in a core member or in a sleeve member, is preferably formed from a polymeric material, such as an elastomer such as polyurethane or other materials that are well known in the published literature.
  • An elastomeric cloth layer can be provided with a sufficiently conductive material (such as, for example, antistatic compounds known as antistatic agents, ionic conductive materials or electrically conductive dopants) in order to have a sufficiently low specific electrical resistance.
  • a resilient elastomeric layer of a core member or a sleeve member may also be in the form of a foamed or non-foamed material that has a transverse elongation number that is preferably in the range of 0.2-0.5. The transverse elongation of a foam can easily be measured in a piece of macroscopic size by applying compressive stress in one direction of a rod-shaped sample of the material, e.g.
  • a resilient layer or resilient layers of the sleeve are provided which have a resilient elastomer with a transverse elongation factor in the range of 0.45-0.5.
  • a non-compliant layer contained in a sleeve member preferably comprises a polymeric material such as polyurethane or other materials that are well known in the published literature.
  • the compliance of a layer can be determined from the point of view of the Macro compliance and micro compliance are considered.
  • the Macro compliance is the layer able to adhere to relatively large Adapt objects, e.g. the edges of a large, fully toned area, the one has thick toner coverage.
  • the micro compliance comes e.g. in the Scale of individual toner particles into play.
  • the outer surface of a roll core can have an extremely thin outer surface Have surface area that has low adhesiveness (not in Fig. 9 referred to), e.g. a surface made up of submicroscopic particles Silicon dioxide, titanium dioxide and the like is treated, or a surface area, which has a thickness in the range of molecular dimensions and chemical Way is selected or changed so that the range is chemical molecular groups having a low surface energy (not shown in Fig. 9).
  • Have surface area that has low adhesiveness e.g. a surface made up of submicroscopic particles Silicon dioxide, titanium dioxide and the like is treated, or a surface area, which has a thickness in the range of molecular dimensions and chemical Way is selected or changed so that the range is chemical molecular groups having a low surface energy (not shown in Fig. 9).
  • the innermost surface of a sleeve member 543 for each of the modules 591 B, C, M or Y can have an extremely thin surface area that over has low adhesiveness (not shown in Fig. 9), e.g. a surface those with submicroscopic particles of silicon dioxide, titanium dioxide and the like is treated, or a surface area that has a thickness in the range of molecular Has dimensions and is chemically selected or modified to chemical To have molecular groups that provide low surface energy (in Fig. 9 not specified).
  • An electrical bias is applied to an intermediate transfer roller 508 B, C, M, and Y, respectively, to electrostatically transfer a toner image from a first imaging member 503 B, C, M, and Y, respectively.
  • An electrical bias can be applied directly to a core element via a conductive roller core or via a conductive coating, for example a metallic film, which is applied to the surface of a non-conductive roller core.
  • the core member comprises a compliant elastomeric blanket layer coated on the roll core, the compliant blanket has an electrical resistivity less than about 10 10 ohm-cm.
  • the specific electrical resistance of a core element or its components is meaningless if the electrical bias is applied across a component of the sleeve element.
  • the electrical bias When the electrical bias is applied to a sleeve member, it can be applied to a reinforcing tape or a stiffening layer of the sleeve member.
  • the stiffening layer may extend beyond the side edges of the sleeve to allow engagement by electrical sockets which engage the extension of the stiffening layer to provide electrical bias to the stiffening layer upon rotation of the sleeve when the sleeve is supported by the core member ,
  • the one has relatively conductive structure, the transfer of a single color Image from marking particles on the surface of the transmission element with a relatively narrow contact area (preferably 2-15 mm and especially 3-8 mm) and a relatively low voltage of e.g. 600 V of a suitable one Polarity by connecting a voltage source (not shown) to the core element 541 B, C, M or Y is achieved.
  • the contact area is in Direction of movement of the recording sheet measured.
  • each image transmission element is formed transferred to a receiving element, which in a pressure gap between the Image transmission element and a counter pressure roller 521 for each of the modules 591 B, C, M or Y is fed, which is suitable by the power supply 552 is electrically biased to transfer the charged toner particle image onto a To initiate the admission sheet.
  • the receiving element is of a suitable type Receiving element supply (not shown) is fed and moves serially into each of the Printing column 510 B, C, M and Y, where there is the corresponding image from marking particles in an appropriately register-accurate arrangement receives a composite to form multicolored image.
  • the colored pigments can overlap to form areas of color different from those of the pigments are different.
  • the receiving element leaves the last pressure gap and is from a suitable transmission mechanism (not shown) to a fuser where the image from marking particles using heat and / or pressure, preferably both, is fixed to the receiving element.
  • a charge station 524 can be provided to attach a neutralizing charge to the receiver dispense to facilitate the separation of the receiving element from the tape 516.
  • the Recording element with the fixed image made of marking particles then becomes Removed by the operator transported to a remote location or upside down and moved through the machine again to take a second picture on the other side receive.
  • the corresponding transmission elements are each from their corresponding cleaning device 511 B, C, M and Y cleaned to them for their prepare for reuse.
  • Image transfers both first and second, are preferably carried out in each module without the use of heat, so that there is no fusion or sintering of the toner images that are on the Transfer sheet until the sheet enters the fuser.
  • the used Toners are preferably those that have a glass transition temperature that is higher than the temperature at which the transfer occurs in both the first and the second Transfer pressure gap takes place.
  • the pickup elements used with the rendering device 500 can vary significantly. For example, it can be thick or thin paper act as banners.
  • Suitable sensors of any generally known type, e.g. mechanical, electrical or optical sensors are used in the image processing device 500 used to provide control signals to the device. Such sensors are located along the travel path of the receiving element between the Support element supply, through the various pressure gaps to the fuser. Additional sensors can be used with the photoconductive drum of the first Imaging element, the transfer element drum of the intermediate image, the Back pressure elements and various image processing stations can be connected. The sensors determine the location of the receiving element on its path, and the position of the photoconductive drum of the first imaging element in Relationship with the image processing stations, and generate each corresponding signals. Such signals are used as input information in a logic and control unit entered, e.g. into a microprocessor.
  • a logic and control unit entered, e.g. into a microprocessor.
  • Microprocessor Control unit Based on generates such signals and a suitable program for the microprocessor Control unit signals to determine the time function of various electrostatographic Process stations for executing the image processing method and the Control drive of the various drums and belts by the motor M.
  • a suitable program for the microprocessor Control unit signals to determine the time function of various electrostatographic Process stations for executing the image processing method and the Control drive of the various drums and belts by the motor M.
  • Fig. 13 shows a sketch of a sleeve member of a transfer element roller Invention, designated 90, on the outer surface 91 of the sleeve member marked with a series of descriptive or specification marks provided on the sleeve to a parameter related to the sleeve specify.
  • the specification marks are arranged in a small area 92 ", which is close to one end of the sleeve element and outside the area, which is used for the transmission.
  • the specification marks contained in a small area 92 'located at an end edge of sleeve 90 (The individual layers comprising sleeve 90 are not shown).
  • a enlarged view 92 of each of the small areas 92 'or 92 " is shown in FIG.
  • the scanner 14 and represents the descriptive specification marks in the form of a bar code may have, as indicated by paragraph 93, which e.g. from a scanner can be read.
  • the scanner can be mounted in an electrophotographic machine to monitor a transfer element roller, e.g. during operation the machine or during a period when the machine is at a standstill, or the scanner can be external during the installation or maintenance of a roller according to the invention to be provided.
  • the specification marks can be of one Specification mark detector 95 can be read, scanned or detected.
  • the analog or digital output of the specification mark detector to a logic and Control unit that is built into an electrostatographic machine, which uses a transmission element according to the invention or it can be external are processed, e.g. in a portable computer during installation or the Maintenance of a transmission element according to the invention, or it can be in any other suitable data processing system can be processed.
  • the specification marks can be optical, magnetic, electrical, mechanical or with the help of radio frequency to be read.
  • the Specification marks include all suitable marks, e.g. B. symbols and ordinary words, and they can be color-coded.
  • the specification marks can also be read visually or interpreted by visual inspection. suitable Materials for the specification marks are e.g.
  • the specification marks can be a storage device that stores a code and is electrical with the detector or is in electro-optical contact. Alternatively, the specification marks can be found on be attached to a label that adheres to the outer surface of the sleeve member.
  • the Specification marks can also have raised areas or by embossing with a stamp or by otherwise deforming a small local area are generated on the outer surface of the sleeve member, and the deformations can be mechanically scanned or otherwise detected or using a specification mark detector 95 in the form of a touch probe or be read by other mechanical means. For some applications it can too be desirable to place specification marks on an inner surface of a To attach sleeve element or on the outer surface of the core element.
  • the outer diameter of a roller are recorded so that the contact area or the register accuracy parameters can be set accordingly.
  • the specific electrical resistance of a Transmission element in a radial direction can be in the specification marks are recorded so that the electrical bias applied to the roller can be suitably adjusted for optimal performance.
  • the effective hardness and the effective modulus of elasticity of a roller can be found in the specification marks are recorded so that the contact areas can be set appropriately.
  • the Date of manufacture of the roller can be found in the specification marks Diagnostic purposes are recorded so that the end of the life of the roller for timely replacement can be estimated. Specific information for everyone given roller, e.g.
  • the information can be used to do so to speed up the calibration time of a register accuracy system, such as is explained below.
  • the register accuracy system can be one Use software algorithm that the speed of the line start clock controlled, which is fed into an LED write head.
  • a separate line start bar is used for each color module, each of which is the length of the color toner image of the controls the corresponding color separation image generated by each module, whereby it is ensured that the length of the color toner image in the entire image is correct and is uniform. It is known that there is generally a change of engagement between a first image processing roller and a transfer roller Gear ratio changes, changing the length of the image by changing it e.g.
  • the register accuracy unit can provide diameter information of a newly installed sleeve Correct the start of the line immediately so that the length and uniformity of the picture are correctly preserved.
  • This setting of the parameters in the algorithm, the Controlling the beginning of line is one of several parameters that controls must be in order to get an exact register accuracy of each digital picture, which from the Write head to ensure.
  • the specification marks can also include the non-uniformity information provide regarding the sleeve.
  • the sleeve radius can be at different points vary along the circumference, which is usually the case. Similarly points also the first imaging element radius changes, both as Non-uniformity are known, as described above. It is desirable that Attach the transmission element to the sleeve so that the transmission element when it engages with the first imaging element, no corresponding maximum has radial tips that intervene periodically.
  • the specification marks or the position of the specification marks on the sleeve can be proportional Placing the sleeve about its axis of rotation with respect to the first imaging element, with which it should intervene.
  • the endless paper transfer belt 516 is carried around a plurality of support elements.
  • the plurality of support members are rollers 513, 514, preferably the roller 513 is driven by the motor M as shown (of course, other support members such as runners or bars would be for use suitable with this invention).
  • the drive of the roller provided by Motor M causes the paper conveyor belt 516 to be driven, which in turn can be used to frictionally drive each of the intermediate transfer members.
  • the intermediate transmission elements in turn drive a corresponding first imaging element by friction, or additional drives can be provided.
  • the speed of the process is determined by the speed of the paper conveyor belt 516, which is typically 300 mm sec -1 .
  • a first imaging element may be slightly inclined with respect to an intermediate transfer element.
  • the endless belt 516 preferably comprises a material which has an electrical resistivity greater than 10 5 ohm-cm, and particularly when the electrostatic adhesion of the receiving element is not exerted, preferably an electrical resistivity of between 10 8 ohm-cm. cm and 10 11 ohm-cm. Where the electrostatic adhesion of the receiving element is exerted, an endless belt is preferably used which has a specific electrical resistance of more than 1 x 10 12 ohm-cm. This specific electrical resistance is the specific electrical resistance of at least one layer if the band comprises several layers.
  • the mesh material can be any of a variety of flexible materials, such as a fluorinated copolymer (such as polyvinylidene fluoride), polycarbonate, polyurethane, polyethylene terephthalate, polyimide (such as Kapton TM), polyethylene naphthoate, or silicone rubber.
  • a tape material may contain an additive such as an antistatic agent (e.g. metal salts) or small conductive particles (e.g. carbon) to provide the conductivity desired for the tape. If materials with a high electrical resistivity (ie greater than about 10 11 ohm-cm) are used, additional corona charging stations may be required to discharge any residual charge that remains on the paper conveyor belt after the pickup element has been removed.
  • the paper conveyor belt may have an additional conductive layer beneath the high resistivity layer that is electrically biased to cause transfer of the image of marking particles, but it is preferred to use an arrangement without the conductive layer and instead use the transfer bias either create one or more of the backup rollers or with a corona charging station.
  • the endless belt is relatively thin (20 microns - 1000 microns, preferably 50 microns - 200 microns) and flexible. It is also contemplated that the invention will relate to an electrostatographic color machine which generally uses a continuous web-shaped take-up element and does not require a separate paper conveyor belt. Such continuous web-shaped receiving elements are usually provided by a paper roll which is mounted in such a way that it enables the paper to be unwound when the paper runs through the device as a continuous web.
  • the charge on the Receiving element can be applied by the charging station 526 to the Attract electrostatically to the tape 516.
  • a squeegee 527 with the Charging station 526 related can be used to mount the receiver to push the tape and all the air that is between the receiving element and the Tape is removed to remove.
  • a recording element can at times in more than engage an image transfer printing nip and is preferably not at the same time in the fuser printing nip and in the image transfer printing nip.
  • the way of Recording element in order to transfer the various different Receiving color images serially generally enables the use of Support elements with different thicknesses.
  • the support structures 575a, 575b, 575c, 575d and 575e are immediately before and after each transfer nip is used to tape the 516 at the back Contact and change the linear path of the tape 516 to the tape 516 wrap each transmission element so that a contact surface of the tape is present is larger than 1 mm on each side of the pressure gap or at least on one side of the Pressure gap and preferably the total contact area is less than 20 mm is. This contact area enables reduced ionization before and after Nip.
  • the nip is where the platen roller is at the back of the Band 516 touches or wherever at the point where the electric field in the Essentially, no pressure roller is used.
  • the image transfer area of the printing nip is a smaller area than the whole Contact area.
  • the contact surface of the tape with the intermediate transfer element also a path for the leading edge of the receiving element ready to the curvature to follow the intermediate transmission element, but separately from the engagement with the Intermediate transfer element as it moves along a line running in the Essentially tangential to the surface of the cylindrical intermediate transfer element is.
  • the backing rollers 521 B, C, M and Y exert on the back of the belt 516 Pressure and force the surface of the resilient intermediate transfer member to adapt to the outline of the receiving element during transmission.
  • the pressure of each of the platen rollers 521 is B, C, M and Y on the Paper conveyor belt 516 about 48 kPa (7 psi) or more.
  • the counter pressure rollers 521 can by corona charging stations, prestressed doctor blades or Brushes to be replaced. Significant pressure (preferably without increased pressure) Temperature) is used in each transfer pressure nip to take advantage of the to obtain compliant intermediate transmission element, which in the adaptation of the Toner image to the recording element and the image content both in the microscopic are also on a macroscopic scale.
  • the print can only be made from Bias mechanism can be provided, or it can be pressure from another Element such as a roller, a shoe, a squeegee or a brush become.
  • the intermediate transfer member is also in pressure engagement with the first imaging element to the toner image on the first imaging Transfer element to the intermediate transfer element.
  • the references reveal that Use of air cylinders, which are the first imaging element and the Push the intermediate transfer roller together into a pressure nip. Feathers can can also be used, either alone or together with air cylinders.
  • the sleeve members are 542 B, C, M and Y removable from core elements 541 B, C, M and Y or can on the core elements 541 B, C, M and Y are attached, the core elements preferably connected to the frame of the device 500 during these operations stay.
  • a removal means for removing a sleeve member from one Core element and an attachment means for attaching a sleeve member on a The core element will be together with specifications regarding further special features of a core element disclosed next.
  • a removal means and an attachment means preferably include the use a pressurized fluid to remove or attach a fluid
  • the removal or the Attachment includes pushing the sleeve member along a core member.
  • the preferred fluid is compressed air, which has a pressure in a range of approximately 340-1040 kPa (50-150 psi).
  • the Roll core have a gradually tapered section that at one End begins, with the gradually tapered section being an essential one Is part of the roll core.
  • 10 shows a roller according to the invention, designated 100, which has a sleeve member 102 which is in the operating position on the Roll core 101 is fixed, which comprises a conical portion, which adjoins a End of the roller.
  • the conical section 104 is coaxial with that in the Substantially cylindrical section of the roll core, the diameter of the conical section enlarged to a maximum diameter, which is essentially is the same as that of the substantially cylindrical portion starting from a diameter slightly smaller than that of the substantially cylindrical section.
  • the rejuvenation helps enable that Sleeve element during the attachment of a sleeve element on the roller core the conical section slides as if by an arrow indicated by the letter A is indicated.
  • the essentially cylindrical section there is a plurality of holes or openings 103 which are connected to a chamber are connected, which is located within the roll core, the chamber with a compressed air source can be connected and the plurality of holes in the essentially cylindrical section next to the gradually tapered Section is located.
  • a series of holes 103 are in the same Distance gradually by a circumference and a few millimeters from the beginning of the tapered section removed.
  • Compressed air is drawn from the chamber through the Holes transferred to a sleeve member during attachment of the sleeve member stretch elastically on the substantially cylindrical portion so that the Compressed air source can be switched off when the sleeve element is in a Operating position is on the roller core, whereby the sleeve element relaxes and tightly encloses the roll core in a uniform shape.
  • Compressed air becomes similar used to close the sleeve member during removal of the sleeve member stretch.
  • a core element with a thick compliant layer with which a Roll core is coated have a conical end (not shown).
  • a roller according to the invention designated 200 is comprised of a tapered member 205 attached to one end of a roll core 201 adjacent and can be removed from it.
  • the conical element has one maximum outer diameter that is less than or equal to that of the end of the Roll core is adjacent to the conical part, the roll core being a series of openings 203 through which compressed air can be sent around the sleeve 202 expand during their installation or removal.
  • a separable conical member 305 use that is adjacent to one end of the core element and thus reversible coaxial can be connected if a roller according to the invention, designated 300 has a core member 306 that includes a roll core 301 that additional Layers, e.g. a thick compliant layer 307.
  • the conical element 305 has a maximum outer diameter that is less than or equal to is that of the end of the core element which is adjacent to the conical part.
  • the End of the core element which is adjacent to the conical element, includes one cylindrical portion 304 that has a diameter that is substantially the same that of the operating length of the core member which is the thick compliant layer the cylindrical length comprising a series of holes or openings 303 which are arranged around a circumference through which compressed air can be passed, to expand the sleeve 302 during its attachment or removal.
  • a sleeve element To easily and non-destructively remove a sleeve element from one Core element or an application of a sleeve element to a core element other mechanisms can be used that temporarily protect the inner diameter of a sleeve member larger than the outer diameter of a Can make core element. For example, heating or cooling one or both of the elements can be applied to make a difference in thermal Exploit expansion between a sleeve element and a core element.
  • non-stick contact means that a sleeve member clean from a core member by a first force per unit area can be separated, which is considerably less than a second force per unit area, which is generated by the compressed air used to hold the sleeve during its Stretch distance from the core element.
  • An intermediate transfer roller comprises a sleeve element in the Form of an endless band that is removable and replaceable from a core member.
  • a sleeve member maintains a shape of an endless band not only during the Operation of the intermediate transfer roller, but also during the attachment of the Sleeve element on the core element when the intermediate transfer roller is not in Operation or during the removal of the sleeve member from the core member if the Intermediate transfer roller is not in operation.
  • No additional funds such as mechanical means, e.g. Grippers are used to remove the sleeve element during the Keep operation of the intermediate transfer roller on the core member.
  • the non-compliant material can be rigid or flexible and has a modulus of elasticity that is greater than approximately 100 MPa, a thickness that is greater than approximately 100 mm, and a specific electrical resistance in a range of approximately 10 7 - 10 13 ohm-cm.
  • a resilient elastomeric layer has a specific electrical resistance, which is preferably in a range of approximately 10 7-10 11 ohm-cm and in particular approximately 10 9 ohm-cm, and an elastic modulus, which is preferably less than approximately 10 MPa and is in particular in a range of 1-5 MPa.
  • a thick compliant layer has one Thickness, which is preferably in a range of 2 - 20 mm, and in the Sleeve elements (vi) to (vii) has a thin compliant layer with a thickness that is preferably in a range from 0.5 to 4 mm.
  • a stiffening layer has a specific electrical resistance, which is preferably less than approximately 10 10 ohm-cm, a thickness, which is preferably less than approximately 500 micrometers and in particular 20-200 micrometers, and an elastic modulus that is preferably greater than about 0.1 GPa, and more preferably 50-300 GPa.
  • a stiffening layer tape or tape can be made of any suitable material, for example a metal, an elastomer or a plastic.
  • a preferred material for the stiffening layer is nickel.
  • a seamless mesh or tube is preferred as the stiffening layer, although an endless mesh or tube can also be used which is produced from a flat piece, for example by ultrasonic welding or an adhesive.
  • the stiffening layer with its high loop stiffness effectively prevents a significant change in the circumference of the transmission element if it is resiliently distorted in a printing pressure nip.
  • the stiffening layer reduces the bulge of the intermediate transfer roller in areas adjacent to the printing nip, the bulges or other deformations being able to form under the stiffening layer due to the incompressibility of the compliant layer.
  • the stiffening layer makes it possible to flatten the intermediate transfer roller at the pressure nip, while reducing the size of the bulge in the vicinity of the pressure nip and thus preventing the running deviation.
  • a reinforcing tape can be rigid or flexible and has an elastic modulus in a range of 100-300 GPa, one Thickness, which is preferably in a range of 20-500 micrometers and in particular in a range of 40-100 micrometers.
  • a reinforcement tape can be made of any suitable material, e.g. B. from a metal, an elastomer, a plastic or a reinforced material. For example, for a reinforced one Act silicone strap.
  • a seamless band or hose is used as the stiffening layer preferred, although an endless belt or hose can also be used from a flat piece e.g. made by ultrasonic welding or an adhesive becomes.
  • the inner surface closest to the core element
  • a conductive material coated to make electrical contact with the core element improve and also around a uniform electric field at all points on the Ensure underside of the sleeve element (not shown in the figures).
  • an outer release layer preferably has a thickness in a range of approximately 1-50 micrometers and in particular 4-15 micrometers, an elastic modulus that is preferably greater than 100 MPa, and a specific electrical resistance, which is preferably in a range of approximately 10 7-10 13 Ohm-cm and in particular 10 10 Ohm-cm.
  • a preferred material for an outer release layer according to the invention is a ceramer as described in US 5,968,658.
  • the relatively thin flexible elastomer can Fabric layer and the relatively thick compliant elastomeric fabric layers in their composition may differ, but they are inexpensive to manufacture preferably of the same material.
  • any core element or sleeve element of the invention that interfaces between resistant layers it may be useful to have a thin conductive layer to provide electrical contact and electrical uniformity Field (not shown in the figures) to improve.
  • a transmission element according to the invention can be used in other environments in which a paper conveyor belt is not included.
  • Figures 1-8 illustrate various embodiments of an intermediate transfer roller in accordance with the invention. These embodiments are intermediate transfer rollers made of various combinations of core elements and sleeve elements, and in each of Figures 1-8 a sleeve element is shown operatively mounted on a core element. Table 1 summarizes these combinations with respect to the various embodiments of a core element (a), (b) and (c) as listed above and the various embodiments of a sleeve element (i) to (vii) as listed above.
  • the first embodiment of an intermediate transfer roller with a interchangeable sleeve member is shown in Fig. 1.
  • the intermediate transfer roller is designated by the number 10 and comprises a core element 11 in the form of a bare Roll core and a sleeve member made of a non-compliant layer 12th is made.
  • a core element 11 in the form of a bare Roll core
  • a sleeve member made of a non-compliant layer 12th is made.
  • the core element and the interchangeable sleeve member has the features shown in Table 1 for FIG. 1 be cited.
  • the second embodiment of an intermediate transfer roller with a interchangeable sleeve member is shown in Fig. 2.
  • the intermediate transfer roller is designated by the number 20 and comprises a core element, which is a roller core 21 and a sleeve member 25 consisting of a non-compliant layer 22 and an outer Peel layer is made.
  • the outer release layer may be required to do so help prevent toner particles from sticking to the roller when the toner is off the intermediate transfer roller is transferred to the receiving element.
  • the core element and the interchangeable sleeve member has the features shown in Table 1 for FIG. 2 be cited.
  • the third embodiment of an intermediate transfer roller with a interchangeable sleeve member is shown in Fig. 3.
  • the intermediate transfer roller is designated by the number 30 and comprises a core element which has a roller core 31 and a sleeve member 35 made of a resilient elastomeric layer 32 and an outer release layer 33, which may be required to thereby help prevent toner particles from sticking to the roller when the toner is off the intermediate transfer roller is transferred to the receiving element.
  • the compliant layer improves electrostatic transmission (compared to the first and the second embodiment) to a large extent, especially when toner of the Intermediate transfer roller is transferred to the receiving element.
  • the core element and the interchangeable sleeve member have the features shown in Table 1 for FIG. 3 be touched.
  • the fourth embodiment of an intermediate transfer roller with a exchangeable sleeve element is shown in Fig. 4 and is designated by the numeral 40 and includes a core member, which is a roll core 41, and a sleeve member 45, which is a reinforcement tape 44, a resilient elastomeric layer 42 which is on the SB 44 is coated, and an outer release layer 43 is formed on the compliant layer 42 is coated.
  • This embodiment is highly effective because the reinforcement band 44 not only has a good release surface with the bare Roll core 41 provides, but also a structural strength when the sleeve member is handled while being attached to or removed from the core member.
  • the Core element and the interchangeable sleeve element have the features that in Table 1 for Fig. 4 can be given.
  • This fourth embodiment is the most most preferred of the embodiments that do not include a stiffening layer.
  • the fifth embodiment of an intermediate transfer roller with a interchangeable sleeve member is shown in Fig. 5.
  • the intermediate transfer element is designated by the numeral 50 and comprises a core element, which is a roller core 51, and a sleeve member 55 comprising a reinforcing band 54, a compliant one elastomeric layer 52 coated on the reinforcement tape and a Stiffening layer 53 outside and in close contact with the compliant layer 52.
  • a thin release layer (not shown) can be outside the stiffening layer 53 be coated if necessary.
  • the core element and the interchangeable sleeve member has the features shown in Table 1 for FIG. 5 be cited.
  • FIG. 6 The sixth embodiment of an intermediate transfer roller with a interchangeable sleeve member is shown in Fig. 6.
  • This to a large extent powerful intermediate transfer roller embodiment is with the number 60 denotes and includes a core member, which is a roller core 61, and a Sleeve member 69, which is a reinforcing tape 64, an inner, relatively thick compliant elastomeric fabric layer 66 with which the reinforcing tape 64 is coated, a stiffening layer 65 outside of and in close contact with the inside Cloth layer 66, an outer, relatively thin, compliant elastomeric cloth layer 67, with which the stiffening layer 65 is coated, and an outer release layer 63, with which the outer cloth 67 is coated.
  • the outer cloth layer 67 ensures in addition to that ensured by the relatively thick inner cloth 66 Macro compliance is a good micro compliance.
  • the core element and that Interchangeable sleeve members have the features shown in Table 1 for FIG. 6 be cited.
  • the seventh embodiment of an intermediate transfer roller with a interchangeable sleeve element is shown in Fig. 7 and is designated by the numeral 70.
  • the operating section of the core element 78 comprises a roller core 71 which is connected to a relatively thick compliant layer 76 is coated, and the sleeve member 79 includes a stiffening layer 75 on which a relatively thin compliant elastomeric cloth layer 77 is coated and an outer release layer 73, which on the compliant elastomeric cloth layer 77 is coated.
  • This embodiment will preferred because of the lower cost of the sleeve member 79, since the compliant layer 76, which is coated on the roller core 71, many renewal of a sleeve can withstand wear and tear or damage at the end of their life.
  • the eighth embodiment of an intermediate transfer roller with a interchangeable sleeve element is shown in Fig. 8 and is designated by the numeral 80.
  • the operating section of the core element 82 comprises a roll core 81 which is connected to a relatively thick compliant sheet 86 is coated, which in turn in close contact with a stiffening layer 88 outside the compliant layer 86 stands, the sleeve layer 89 has a stiffening layer 85 which with a relatively thin compliant elastomeric cloth layer 87 is coated, and a outer release layer 83 with which the cloth 87 is coated.
  • Each of the Stiffening layers 85 and 88 are preferably half as thick as that Stiffening layers disclosed in the above embodiments.
  • the Eighth embodiment is preferred because the elastomeric sheet 86 is of the Stiffening layer 88 is protected on the core member 82, the Stiffening layer 88 continues to be an excellent release layer from the like Stiffening layer 85 on the sleeve member 89.
  • the eighth Embodiment over the sixth embodiment due to Preferred cost advantages result from a simpler and cheaper sleeve element result.
  • the core element and the exchangeable sleeve element have the features which are listed in Table 1 for Fig. 8.
  • the roll core 41 is an aluminum mandrel provided with a Martin Hardcoat that has an outer diameter of 154.00 mm ⁇ 0.01 mm and a surface roughness R z ⁇ 3 microns, as with a Mitatoya micro profile meter using the method of FIG ANSI B 46.1 is measured with a scan length of 0.25 mm.
  • the reinforcing band 44 of the sleeve element 45 is a seamless tube made of copper coated nickel.
  • the reinforcement tape has a thickness of 125 microns ⁇ 5 microns, an internal surface roughness R z ⁇ 2 microns as measured with a Mitatoya micro-profile meter using the ANSI B 46.1 method with a scan length of 0.25 mm, an elastic modulus of 210 GPa ⁇ 10 GPa measured by the method of ASTM D412, an inner diameter of 153.925 mm ⁇ 10 mm and a length of 370.0 mm ⁇ 0.3 mm.
  • the cloth layer 42 with which the reinforcing tape 44 of the sleeve element 45 is coated, comprises a polyurethane which is provided with an antistatic compound, as described in Example 4 below, and has a surface roughness R A ⁇ 0.5 micrometers and R z ⁇ 3 microns as measured with a Mitatoya micro-profile meter using the ANSI B46.1 method with a scan length of 0.25 mm, a modulus of elasticity of 3.5 MPa ⁇ 1.0 MPa as measured by the method of ASTM D575 , a hardness of 60 ⁇ 5 ShoreA, a specific electrical resistance, measured at 70 ° F and 35% relative humidity, of 5.0 x 10 8 Ohm-cm ⁇ 0.5 x 10 8 Ohm-cm, an outer diameter of 174 , 00 mm ⁇ 0.05 mm, which is measured when the sleeve element 45 is in position on the roller core 41, an unevenness ⁇ 20 micrometers, which is measured when the slee
  • Outer release layer 43 is ring coated on cloth layer 42 and comprises a ceramer as described in Ezenyilimba et al., U.S. Patent No. 5,968,658, and is 4 microns ⁇ 1 micron thick with surface roughness R A ⁇ 0.5 microns and R z ⁇ 3 microns as measured with a Mitatoya micro-profile meter using the ANSI B46.1 method with a scan length of 0.25 mm.
  • the release layer 43 has an elastic modulus of 1.1 GPa ⁇ 0.4 Gpa, measured according to ASTM D882, and a mass resistance between 1 x 10 10 Ohm-cm and 2 x 10 12 Ohm-cm.
  • a sleeve member according to the invention is below described in sections (1), (2) and (3).
  • the sleeves are preferred seamless throughout, but may have seams around the bottom in some lower layers electrical and mechanical properties for transmission on the outer surfaces not to be influenced.
  • the adhesion between the reinforcing tape 44 and the cloth layer 42 is for the Production of a sleeve element, which comprises a hard grinding process, desirable. Good adhesion also ensures that a sleeve element with a State-of-the-art equipment can be sanded for final processing can to get a very slight unevenness. Improving liability A nickel reinforcement tape can be cleaned by thoroughly cleaning the Nickel surface can be reached, e.g. by degreasing the nickel by a Ketone solvent or by etching it with a dilute strong acid or base. The roughening of the surface can also improve the good adhesion help. Another method to improve liability is to use a electroformed, copper-coated nickel strip, e.g.
  • metals can also such as. Aluminum or zinc can be used to cover the nickel surface and improve liability.
  • the adhesion can be greatly improved by the surface of the nickel is treated to create a chemical bond between the To excite nickel and the polyurethane, e.g. through the use of in the trade available urethane primers.
  • primers are CONAP® AD6, CONAP® AD1147, manufactured by Conap Inc. of Olean, N.Y. are available, and Chemlok® 210, Chemlok® 213, Chemlok® 218 or Chemlok® 219, available from Lord Corporation, Cary, North Carolina, are available to name a few.
  • Such primers are less desirable as an additional layer (primer layer) between the nickel and the conductive polyurethane cloth the specific electrical resistance of the Can contaminate and change the transmission element.
  • the preferred method consists of treating the surface of the nickel sleeve as in the following example:
  • An electroformed nickel tape (available from Stork Screens America, Inc., of Charlotte, North Carolina) is pre-cleaned with 1N sodium hydroxide solution, rinsed with water and then air dried. From 2% by weight (3-aminopropyltriethoxysilane, obtained from Gelest Inc. of Tullytown, PA) and 98% by weight (95% ethanol + 5% water) Treatment solution prepared. The shelf life of the treatment solution is one hour. Finally, the clean nickel strip is put into the Treatment solution dipped and then rinsed with ethanol. Finally, the Sleeve cured for 30 minutes.
  • a polyurethane cloth is formed on a reinforcing tape in a mold by: from commercially available prepolymers, polyols, chain stretchers and antistatic Means is poured.
  • US 4,729,925 and 5,212,032 disclose the preparation of resistant polyurethane elastomers based on Bis [oxydiethylenbis (polycaprolactone) yl] 5-sulfo-1,3-benzenedicarboxylate.
  • PIP Antistatic Medium methyl triphenylphosphonium sulfate
  • US 5,212,032 a controlled specific electrical Resistance achieved by using a complex combination of diethylene glycol and Antistatic agent made of ferric chloride (hereinafter abbreviated DGFC) is used. Preferred methods are given in Examples 2, 3 and 4.
  • a diisocyanate-terminated prepolymer VB635 (available from Uniroyal Chemical Company from Middlebury, CT) is kept at 100 ° C for two hours before use heated.
  • a diol-terminated prepolymer (available from Chemcentral Corporation Buffalo, NY) is dried under vacuum for two hours before use.
  • Polymerization catalyst DABCO (available from Aldrich Chemical Company Milwaukee, WI) are weighed, mixed thoroughly and degassed for 5-8 minutes. The degassed mixture is poured into a sleeve mold, which is heated to 100 ° C preheated oven is cured at 100 ° C for 16 hours.
  • US 5,968,656 discloses the technique of composition and coating of the Ceram revenues coating.
  • the preferred coating method for the The intermediate transfer element of the invention is the ring coating.
  • Alternatives are Spray coating, dip coating and transfer coating are also permitted Method.
  • the coating solution can be heated or be diluted with blending agents.
  • the concentration to adequately control the Thickness, uniformity, drying and curing depends on the chosen one Coating process.
  • Blending agents include alcohol, acetate, and ketones like.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Rolls And Other Rotary Bodies (AREA)
EP01122613A 2000-10-04 2001-09-27 Elément de transfert avec un manchon remplaçable et méthode l'utilisant Withdrawn EP1195654A3 (fr)

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DE102017101284A1 (de) 2017-01-24 2018-07-26 SchäferRolls GmbH & Co. KG Zweischichtwalzen

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JP5054136B2 (ja) * 2010-02-25 2012-10-24 三菱重工印刷紙工機械株式会社 中間転写ブランケット及び電子写真印刷用中間転写体
WO2012147402A1 (fr) * 2011-04-27 2012-11-01 バンドー化学株式会社 Blanchet d'imprimerie et son procédé de production
JP5203527B2 (ja) * 2012-07-26 2013-06-05 三菱重工印刷紙工機械株式会社 印刷部及び電子写真印刷装置
WO2017182054A1 (fr) * 2016-04-18 2017-10-26 Hp Indigo B.V. Appareil d'impression électrophotographique liquide et éléments de transfert intermédiaires
EP4006645A1 (fr) 2018-02-02 2022-06-01 Canon Kabushiki Kaisha Procédé de fixation de lame de régulation et dispositif de création

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EP0406172A2 (fr) * 1989-06-27 1991-01-02 Maschinenfabrik Wifag Dispositif pour appliquer une couche élastique molle sur des rouleaux de machines graphiques
EP0590924A1 (fr) * 1992-09-29 1994-04-06 Xerox Corporation Tuyaux souples appuyés sur des tambours rigides et leur procédé de fabrication
DE19713389A1 (de) * 1996-04-01 1997-11-06 Ricoh Kk Bilderzeugungseinrichtung
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JPH11338329A (ja) * 1998-05-27 1999-12-10 Canon Inc 画像形成装置および装置ユニット
JPH11352795A (ja) * 1998-06-05 1999-12-24 Canon Inc 画像形成装置
JP2000266038A (ja) * 1999-03-17 2000-09-26 Oki Data Corp ローラのチューブ固定方法

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EP0406172A2 (fr) * 1989-06-27 1991-01-02 Maschinenfabrik Wifag Dispositif pour appliquer une couche élastique molle sur des rouleaux de machines graphiques
EP0590924A1 (fr) * 1992-09-29 1994-04-06 Xerox Corporation Tuyaux souples appuyés sur des tambours rigides et leur procédé de fabrication
DE19713389A1 (de) * 1996-04-01 1997-11-06 Ricoh Kk Bilderzeugungseinrichtung
US6072976A (en) * 1996-12-17 2000-06-06 Bridgestone Corporation Intermediate transfer member for electrostatic recording

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Publication number Priority date Publication date Assignee Title
DE102017101284A1 (de) 2017-01-24 2018-07-26 SchäferRolls GmbH & Co. KG Zweischichtwalzen

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