EP0003051A1 - Verfahren zum Aufbau von Druckzylindern mit flexiblem, metallischem Zylindermantel und Kopiergerät mit einem derartigen Druckzylinder - Google Patents

Verfahren zum Aufbau von Druckzylindern mit flexiblem, metallischem Zylindermantel und Kopiergerät mit einem derartigen Druckzylinder Download PDF

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Publication number
EP0003051A1
EP0003051A1 EP78101857A EP78101857A EP0003051A1 EP 0003051 A1 EP0003051 A1 EP 0003051A1 EP 78101857 A EP78101857 A EP 78101857A EP 78101857 A EP78101857 A EP 78101857A EP 0003051 A1 EP0003051 A1 EP 0003051A1
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EP
European Patent Office
Prior art keywords
sleeve
shaft
interior
pressure
cylinder
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.)
Granted
Application number
EP78101857A
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English (en)
French (fr)
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EP0003051B1 (de
Inventor
Jacobus Gerardus Vertegaal
Lodewijk Anselrode
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.)
Stork Brabant BV
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Stork Brabant BV
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Filing date
Publication date
Application filed by Stork Brabant BV filed Critical Stork Brabant BV
Publication of EP0003051A1 publication Critical patent/EP0003051A1/de
Application granted granted Critical
Publication of EP0003051B1 publication Critical patent/EP0003051B1/de
Expired legal-status Critical Current

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    • 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
    • G03G15/75—Details relating to xerographic drum, band or plate, e.g. replacing, testing
    • G03G15/751—Details relating to xerographic drum, band or plate, e.g. replacing, testing relating to drum

Definitions

  • the invention is concerned generally with printing apparatus which include cylinders for transferring of pigment to a substrate using electrostatic techniques.
  • the invention is advantageously utilizable in the printing of multicolor images on substrates which are either in long strip form or in the form of sheets of paper, fabric and the like.
  • Multicolor printing by conventional presses is a complex process from the point of making the color separations, forming the cylinders, operating the presses, providing the pigment or inks for the separate cylinders or other plates, etc.
  • photoelectrostatic imaging is effected by charging the surface of a photoconductive coating in darkness, exposing the same to a light image, then toning the latent image with fine particles either in powder form or suspended in a solvent.
  • the toned or developed image can either be transferred to a receptor or it can be fused in place directly onto the electrophotographic member of which the photoconductive coating is a part.
  • One of the coatings which has been evolved recently is a high gain, high resolution, easely charged, fully dischargeable, wholly inorganic, microcrystalline photoconductive material which has especially the property that it is rugged and extremely flexible when coated onto a thin flexible substrate.
  • the material is disclosed in U.S. Patent 4.025.339.
  • This coating is advantageous in addition to being flexible in that it can be imaged quickly in a high speed press and discharged readily by ambient light so that, as will be explained, it can be provided with an image of toner that is insulating and thereafter charged to apply a charge to the insulating toner while permitting the charge on the untoned areas to be dissipated in light. Secondary toner then can be adhered to the primary toned image and transferred to a substrate.
  • Thin-walled metal sleeves of electrodeposited nickel, copper, iron or other metal have been used in the fabric and other substrate printing field with success.
  • Sleeves of plated metal may be used, such as for example, tin, chromium or other metals as nickel. These sleeves are a fraction of a millimeter thick and can be several meters long and as much as a third of a meter in diameter. They are seamless and are readily supported in printing machines.
  • sleeve is disclosed in U.S. Patent 2.287.122. Such sleeve is foraminous in order to enable ink or other pigment to be expressed by doctor means through the walls of the cylinders onto the passing substrate.
  • the walls are provided with suitable designs in the surface blocking certain of the holes and leaving others open.
  • these sleeves are sputtered with coatings of the photoconductive material which has been mentioned and are imperforate.
  • An important advantage of this type of sleeve is that it is light in weight, it is quite strong and is collapsible so that packing and shipping the same is economical.
  • the sleeves In using the sleeves, they must be mounted in cylindrical form on the printing press to receive and transfer the pigment, and must be supported on their interiors by using some readily installed or removed device to mainrain the sleeves in rigid cylindrical form during use.
  • the invention provides a method of mounting an elongate flexible thinwalled metal sleeve on a frame for use in a rotary printing press, characterized by the steps of providing a rotatable framework including a device for shaping the sleeve into a cylinder; engaging the sleeve over the framework; forming the ends of the sleeve into circles; sealing the ends; containing the ends against axial movement and applying fluid pressure on the interior of the sleeve to inflate the same with uniform incremental internal pressure along said interior thereof.
  • the invention also provides the mounting method according to claim 1, characterized in that the sleeve is unsupported along the remaining length between the ends of said sleeve.
  • the invention provides a printing press employing the said sleeve mounting and characterized by
  • the invention provides the printing press further including the apparatus characterized in that the axially extending spacer means comprise an elongate rigid cylinder whose outer diameter is less than the inner diameter of the sleeve which is adapted to be supported by the apparatus whereby there will be a cylindrical space defined between the outer surface of the rigid cylinder and the inner surface of the sleeve when it is installed, the said pressure being supplied into said cylindrical space and the sleeve thereby being mechanically unsupported throughout its major length during use;
  • said means for applying pressure include means for introducing fluid under pressure in the framework and transmitting the pressure to said cylindrical space when the sleeve is installed in place.
  • Figure 1 there is illustrated in perspective view the type of cylinder 10 which is used with the invention, the same being based upon a sleeve 12 which has been formed by electrodeposition out of nickel, copper or the like, being quite thin - of the order of a small fraction of a millimeter and hence flexible or may comprise a naked sleeve plated with such metals as tin chromium or thus.
  • the resulting product is normally cylindrical and likewise, in sputtering the coating 14 the configuration of the sleeve 12 will be maintained in cylindrical form. It is possible for the sputtering to be carried on with the metal sleeve 12 forming the substrate for the coating in an oval configuration.
  • the sleeve 10 In the mounting of the sleeve or cylinder 10, it will invariably be in a cylindrical configuration for high speed printing presses, especially multi-color presses. Nonetheless the sleeve 10 is to some extent collapsible without damage to either the substrate of metal or the coating of microcrystalline photoconductive material.
  • the metal substrate comprising the sleeve 12 is stiff enough to handle, for example in a size which has a length of about two meters and a diameter which is about a sixth of a meter without axial collapsing or wrinkling, but can be readily compressed or collapsed laterally along its entire length to enable it to be shaped for example into oval form as shown in Figure 1.
  • FIG. 3 illustrates the environment in which the sleeve 10 is intended to be used.
  • a printing presse 16 is shown, this being of a type which is intended to apply two colors of ink or dye carried in the fountains 18 and 20 in registration on a long strip-like substrate 22 of paper or the like.
  • the substrate 22 is guided by means of the rolls 24, 26, 28 and 30 to pass around a back-up roll 32 against which the printing will occur.
  • Two cylinders of the type described are shown at 10 and 10'''.
  • the direction of rotation of the drum 32 is indicated by the arrows 34,.the direction of each of the cylinders 10 and 10''' being indicated by arrows marked on the cylinders.
  • the cylinders 10 and 10''' will be presumed to have images carried on their outer surfaces as primary toned images. These can be applied while the cylinders 10 and 10''' are off the apparatus 16 and the cylinders thereafter installed in the apparatus.
  • the cylinders are charged by suitable corona means at 36 and 38, the charging occurring in light so that the charges on the photoconductive coatings are immediately dissipated leaving only the charges on the primary toner.
  • the type of toner chosen is one which is insulating when developed, that is, fused.
  • the fountains 18 and 20 contain the ink or dye which comprises the secondary toner.
  • the polarity of the particles of the secondary toner is established as the opposite of that of the charge on the primary toner. This can be done electrophoretically or by triboelectric techniques.
  • Electrical bias can be used to assist in this transfer. Transfer will be done in registration.
  • the printingcycle is repeated.
  • remaining secondary toner may be removed from the surfaces of the cylinders 10 and 10''' by suitable solvents or mechanical means at stations 40 and 42, with suitable solvents and/or mechanical means which do not affect the primary toner.
  • the cylinders 10 and 10''' could be provided with developed toned images and treated with suitable reagents or chemicals to render the toned surfaces hydrophobic and the untoned surfaces hydrophyllic to enable the cylinders to be used as printing cylinders with greasy ink in watered offset printing presses.
  • suitable reagents or chemicals to render the toned surfaces hydrophobic and the untoned surfaces hydrophyllic to enable the cylinders to be used as printing cylinders with greasy ink in watered offset printing presses.
  • the cylinder 10 is required to be perfectly cylindrical and relatively rigid during its use and with its mounting or support, should be easily installed and removed from the printing press on which it is to be used. Likewise, it is required to be easily installed and removed from the mounting which carries it.
  • FIG 4 there is illustrated (in section) a form of mounting upon which the cylinder 10 is arranged for use in a printing press.
  • the mounting device 44 basically comprises a device in which the cylinder is suspended in cylindrical configuration and is kept inflated by means of a fluid such as oil or air or the like pumped into the interior of the cylinder 10 and maintained at a low pressure. It has been found that the cylinders 10 can be kept quite rigid and maintain their cylindrical configuration by means of pressures only slightly greater than atmospheric, say of the order of .5 to .7 of an atmosphere greater than ambient. This is considered a surprising result.
  • the cylinder ends must be tightly gripped in cylindrical configuration to prevent wrinkles and bulges.
  • the mounting device is basically formed of two stub shafts 46 and 48, shaft 48 being solid and shaft 46 being hollow.
  • a flanged disc 50 has an inwardly directed annular cup-like flange 52 whose interior diameter is very closely the outer diameter of the sleeve 10.
  • a hub 54 mounts the web 51 of the disc 50 on the hollow shaft 46 non-rotatively, the center of the shaft 46 having a through bore 56 whose inner end may be plugged at 58 but which is provided with a lateral opening at 60 that connects with a radial passageway 62 passing through the hub 54 but located axially interior of the web 51 of the disc 50, the web 51 being imperforate.
  • the interior end of the shaft 46 also has a large washer 64 secured thereto as by welding, the washer 64 supporting an elongate rigid metal cylinder 66 and being secured thereto, also by welding, for example.
  • This cylinder is included in the term axially extending spacer means as employed herinafter.
  • a second disc 70 has a central hub 72 that may be secured to the shaft 48 permanently or non-rotatable relative thereto but held in place by a nut such as 74.
  • the body 76 of the disc is imperforate and has an inwardly directed cup-like annular flange 78 at its outer periphery having the same interior diameter as the flange 52.
  • Suitable packing is provided at 80 and 82 serving to prevent the leaking of fluid outwardly of the discs 50 and 70.
  • the disc 50 is held in place by the nut 81 engaging over the threaded end 83 of the shaft 46.
  • a sleeve 10 is shaped into a cylinder and fitted into the interior of the flange 78 and cemented in place with a suitable adhesive, primarily to render the telescoping connection fluid tight.
  • the flange 50 is not in place at this time.
  • the disc 50 is moved telecopically over the left hand end of the sleeve 10 and again the connection is effected with a coating of adhesive in place to provide a second fluid tight connection.
  • the adhesive has set, the entire assembly is installed in a printing press such as the apparatus 16 and a fluid such as air, hydraulic fluid or the like is admitted into the bore 56 through a suitable fitting attached to the left hand end of the shaft 46.
  • a suitable fitting attached to the left hand end of the shaft 46.
  • This fitting is required to maintain the connection fluid tight while rotating, there being many such fittings known in the art.
  • Such a fitting is indicated at 57, connected by line 59 to the fluid source 61.
  • the fluid is carried in the annular space between the central cylinder 66 and the sleeve 10 and it serves to maintain the sleeve 10 fully inflated and rigid during use.
  • the presence of the inner sleeve enables a very small amount of fluid to be used to maintain the rigidity of the sleeve 10, and in the case of air or other gas being the fluid, the amount of pressure needed to maintain the inflated condition is lower than it would be if the shaft extended fully through the device and there was no cylinder 66.
  • the cylinder 66 functions to maintain the spacing between the discs 50 and 70 and to keep the shafts 46 and 48 in alignment and rotating together.
  • the entire assembly is included in the term "framework" is used.
  • the internal pressure needed for keeping the cylinders inflated on a printing press is so low that readily available air pressure form commercial sources commonly provided in shops and factories will suffice. Further, since the method of transfer of ink to the substrate requires no mechanical pressure in the preferred structure in which the cylinders will be used, mechanical tension alone will be adequate to maintain the cylinders in their normal configuration in many instances.
  • FIG. 5 Two other forms of the invention are illustrated, respectively in Figures 5 and 6, but the principals of construction and operation are basically the same for all of the cylinder supporting devices including that of Figure 4.
  • Each has means for clamping or seizing the ends of the cylinder 10 in a fluid tight connection while shaping the same to form the cylindrical configuration, each has means for admitting a fluid to the interior of the cylinder to inflate it if required but at least to maintain it in rigid cylindrical configuration, and each has means for mounting the device onto a printing press.
  • the mounting devices 90 of Figure 5 differs primarily from that of Figure 4 in that the ends of the cylinder are held in place pneumatic or hydraulic expandable cushions.
  • the right hand shaft 93 has a single bore 96 which connects to one or more radial passageways 98 in the washer end 100 of the cylinder 94 leanding to the interior of an inflatable elastomeric cushion 102 clamped to the end of the cylinder 94 by suitable bands 104.
  • the securement can be effected by room temperature vulcanizing adhesive or other adhesive.
  • a similar cushion 106 shown in deflated condition is provided on the left hand end of the cylinder 94, since this end is shown in condition while it is being assembled.
  • the shaft 92 differs from the shaft 93 and that of Figure 4 in that it has concentric passageways, there being a central bore or pipe 108 and a larger telescoping second bore 110, these being located within one another and being independent of one another.
  • the central passageway formed by the bore 108 is connected through a fitting 112 by way of a short length of conduit 114 through the interior of the cylinder 94 to a lateral opening 116 to which it is connected by a suitable fitting 118.
  • the outer bore 110 connects to one or more radial passageways 120 leading to the interior of the cushion 106.
  • Assembly is effected by moving the end cup-shaped discs 122 and 124 into telescoping engagement with the cylinder 10 taking up on the nuts 126 and 128, introducing a first fluid into the bores 96 and 108 to inflate the cushions 104 and 106 to clamp the sleeve 10 in place and thereafter introducing a second fluid into the interior pipe 108 to maintain the sleeve 10 as a rigid cylinder.
  • the second fluid is held between the inner cylinder 94 and the interior of the sleeve 10. Shaft packing is not deemed necessary in the device 90.
  • FIG. 6 there is illustrated a device 140 which utilizes an elastomeric boot of cylindrical configuration to maintain the sleeve 10 rigid so that no fluid will be engaged against the interior of the sleeve and so that it is not essential that the engagement of the sleeve 10 in the end discs be fluid tight.
  • this device there is again an inner rigid cylinder 142 connected with a pair of end stub shafts 144 and 146 upon which there are engaged the discs 148 and 150 by means of the nuts 152 and 154, respectively.
  • an elongate elastomeric sleeve-like boot 156 On the exterior of-the cylinder 142 there is mounted an elongate elastomeric sleeve-like boot 156 whose ends are tight clamped to the exterior of the cylinder 142 by any suitable means such as the annular band 158 and 160.
  • the hollow bore 162 of the shaft 146 terminates axially within the cylinder 142 at 164 at which point it is connected by way of the conduits 166 connected at 168 to openings in the side wall of the cylinder 142, as for example at 170. Accordingsly passage for fluid from the exterior of the cylinder 142 is provided by way of the bore 162 to the chamber 172 formed on the interior of the boot 156 and the outer surface of the cylinder 142.
  • the assembly of the device 140 and the method of inflation are easily effected since everything may be in place at one end, say the right hand end, the sleeve 10 slipped in place into the cup of the disc 150 while no fluid is present, the second disc 148 telescopically engaged over the left hand end of the sleeve, the nut 152 screwed home and fluid applied. This inflates the boot 156 and rigidifies the sleeve 10. This will form a rather firm base for the sleeve 10 during use.
  • FIG 7 another device 240 is illustrated in which the equivalent components of Figure 6 are designated by the same second and third numerals and the numeral "2" as the first.
  • the principal differences between the devices 140 and 240 lie in the fact that the entire interior of the cylinder 242 carries the fluid, which in this case is a gas and the fact that the end washers of the cylinder 242 function both as such washers and the discs 148 and 150. Thus they carry reference numerals 248 and 250.
  • the fluid is admitted by way of bore 262 in shaft 246 and finds its way into the chamber 172 through passageways 270.
  • the structure 240 is advantageous in eliminating parts comprising outer cup-shaped discs so that there need be no part of the device 240 protruding radially beyond the sleeve 10 itself.
  • the device is lighter in weight, simpler to construct, and more economical than the device 140.
  • a modified embodiment of the inven tion is designated generally by reference character 300 and comprises a central hollow shaft 312 of metal having a plurality of lateral passageways 313 for air.
  • Other fluids may be used, but for convenience only air will be referred to herinafter because it is most convenient to use the same in printing establishments.
  • the ends of the central shaft 312 are closed off by plugs 314 and 316 to which the shaft is welded as indicated at 318 and 320, respectively.
  • a flanged disc is connected to each of these plugs by suitable means, the disc 322 being shown on the left and the desc 324 on the right.
  • These discs 322 and 324 are identical and their construction and functions will be explained in detail later.
  • the plugs 314 and 316 are generally cylindrical and that each of the discs 322 and 324 includes a hollow cylindrical hub shown at 326 and 328 which telecopically engages the respective plugs 314 and 316 on the exterior thereof, airtight connection being maintained by suitable packing such as 0-rings 330.
  • the discs 322 and 324 include internal radial strengthening ribs 332 and 334 integral with the web or body of each disc, the latter being imperforate to retain the air pressure which is to be maintained on the interior of the device 300.
  • the structures at opposite ends of the shaft 312 are different. These represent embodiments of the invention capable of being used together or separately.
  • the structure at the left hand end may be used solely or duplicated at the right hand end; the structure at the right hand end may be used solely or duplicated at the left hand end; one of each structure may be used together at opposite ends.
  • the plug 314 has a cylindrical axial recess formed in its outer end at 336 and a coaxial socket 338 in the center of the recess 336 in which there is disposed a simple air valve 340 of the so-called Schraeder type which communicates by way of the passageway 342 with the interior 344 of the hollow shaft 312.
  • the shaft has the lateral passageways 313 by means of which the outer annular chamber 346 and the inner chamber 344 are in communication.
  • a thin metal sleeve 348 of electrodeposited nickel or the like with an outer photo- conductuve coating is adapted to be clamped into cylindrical configuration on the device 300 and maintained in inflated condition by air pressure. This is effected by introducing air under pressure by way of the valve 340 into the chamber 344.
  • the disc 322 has an inwardly directed radial flange 349 which is engaged over the axial end of the plug 314 and provided with perforations and threaded sockets to aid in the assembly of the device.
  • perforation in alignment with each of the ribs 322 thus providing six equally spaced perforations aligned with threaded sockets in the axial end of the plug 314.
  • One such perforation is indicated at 350 and a threaded socket at 352.
  • the centering flange member 356 has a central spigot 358 which is cylindrical on its' exterior to fit into the recess 336 and is tapered on the interior as indicated at 360 and provided with a keyway at 362. There is also a radial flange portion 363 overlying the flange 349.
  • the member 356 has the aligned perforations in the flange portion 363 for the screw 354 but in addition has several other perforations 364 which are intended to be aligned with threaded sockets 366 formed in the flange 349 to receive other machine screws 368 that pass through the flange portion 363.
  • FIG 12 is an enlarged view of the outer section of the disc 322, there is an annular thickended rim 370 which has an interior (on the right hand face) axially extending annular seat or groove 372 formed fully around its circumference and coaxially centered.
  • annular thickended rim 370 which has an interior (on the right hand face) axially extending annular seat or groove 372 formed fully around its circumference and coaxially centered.
  • elastomeric ring 374 seated in the bottom (left hand end) of the groove 372, the ring 374 being provided with spaced passageways 376 aligned with perforations 378 provided in the rim 370 and opening to an external shallow furrow 380 provided on the exterior of the rim 370.
  • pressure ring 382 of cylindrical configuration which has a plurality of threaded studs 384 secured into its left hand axial end in spaced circumferential position to align with the passageways 376 and perforations 378.
  • the studs 384 extend through these passageways and perforations when the ring 382 is assembled to the disc 322 and are engaged by the nuts 386.
  • the assembly of the apparatus 300 with the sleeve 348 is effected, the sleeve 348 being easily slipped into place as the assembled disc 322, flange member 356 and ring 382, and properly positioned. Thereafter, taking up on the nuts 386 presses the ring 382 against the elastomeric ring 374 which expands in attempting to extrude out of the groove 372 thereby firmly clamping the sleeve 348 in place.
  • the same structure and procedure has been utilized in assembly of the right hand end of the device 300, it can be pumped up to a pressure of say about half an atmosphere through the use of the valve 340 and installed in the printing press.
  • the tapered socket 362 provides for centering and the keyway provides for positive driving of coupling of the device with suitable mechanical driving means associated with the printing press.
  • the right hand end of the device need not have a valve equivalent to the valve 340 but could have a blind end in the equivalent of the tapered socket 360 in the axial end of the plug 316. As a matter of fact, there need not be a second keyway at this location.
  • valve housing 390 set into the right hand plug 316 which has a port 392 leading to the chamber 344.
  • the movable valve 394 is seated at the right hand end of the chamber 396 by means of the 0-rings 398 against the axial intake port 400 and held there by a spring 402.
  • the spring 402 is of a strength to maintain any pressure which is in the chamber 344 and 346 if the device 300 is removed from a press in which it is installed.
  • the stem 404 of the valve member 406 pushes the valve 394 off its seat and holds the port 400 open.
  • the valve member 406 has a coaxial passageway and itself is slidable in the port 400, being kept air tight therein by suitable 0-rings. Its external face 410 has 0-rings to enable it to make a frictional and air tight connection with a fitting that can supply external air pressure to the device 300.
  • the fitting is not shown in Figure 8 but is symbolized by the fitting 412 in Figure 11 as a rotary air connection.
  • the spring 402 keeps the valve member 406 in engagement with the fitting 412.
  • a printing press is shown diagrammatically having the device 300 installed therein, the_structure being such as to utilize an external source of pressure.
  • the other device of the invention previously described may be utilized so long as they utilize an external source of pressure.
  • the device 300 is shown mounted on the frame 414 of a printing press 416, only a very small part of which is diagrammed.
  • the substrate in the form of a web of paper 418 is being guided through the press 416 and may pass over idler and drive rollers, an idler roller being indicated at 420 and a drive roller being indicated at 422 mounted to the frame 414.
  • the press drive 424 may be mechanical, electrical, pneumatic or a combination of these, suitably controlled as custormary with modern printing presses.
  • the mechanical drive extending to the several rotary parts is indicated by the broken lines 426.
  • a pressure source is shown at 428 supplying pressure to the fitting 412 by way of the pressure regulator 430 and the air line 432 and 434.
  • the exact pressure within the sleeve 348 will be controlled by the pressure regulator 430 whose set value may be established manually as by a control 436 or may be varied automatically for certain purposes by way of the line 438.
  • the pressure switch 440 is sensitive to sudden changes in the pressure in the line 434, being connected to the line 434 by a conduit 442. A large hole suddenly occurring in the sleeve 348 or the bursting thereof will cause a sudden dropping of pressure in the chamber 346. The drop will be experienced by the line 434 and the regulator will attempt to equalize the pressure. This radical change sensed by the switch 440 can be made to operate the switch to turn off the press drive and prevent damage.
  • Slight air leaks in the chamber 346 can be taken care of by the regulator 430 as a routine matter.
  • the press 416 will normally have some form of transducer system (not shown) to indicate registration of multiple impressions and a signal from such system can be picked up and transmitted by a line, electrical or pneumatic, as shown at 444 to a sensor 446.
  • This sensor 446 may in turn provide a signal which operates a register adjusting device 448 which is nothing more than an automatic adjustment for the set point of the pressure regulator. It has been found that since the sleeve 448 is made out of metal that is very thin, it is capable of being inflated slightly beyond its normal diameter by a small amount, say a few thousandths of a millimeter. Registration can be affected by this means, to augment ordinary registration control means rather than to replace the same.
  • the pressure adjustment effected by the register adjust device 448 is applied to the pressure regulator 430 by way of the line 438.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Rotary Presses (AREA)
EP19780101857 1977-12-27 1978-12-27 Verfahren zum Aufbau von Druckzylindern mit flexiblem, metallischem Zylindermantel und Kopiergerät mit einem derartigen Druckzylinder Expired EP0003051B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US86433277A 1977-12-27 1977-12-27
US864332 1977-12-27

Publications (2)

Publication Number Publication Date
EP0003051A1 true EP0003051A1 (de) 1979-07-25
EP0003051B1 EP0003051B1 (de) 1982-01-20

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EP19780101857 Expired EP0003051B1 (de) 1977-12-27 1978-12-27 Verfahren zum Aufbau von Druckzylindern mit flexiblem, metallischem Zylindermantel und Kopiergerät mit einem derartigen Druckzylinder

Country Status (5)

Country Link
EP (1) EP0003051B1 (de)
JP (1) JPS54130208A (de)
AU (1) AU528151B2 (de)
CA (1) CA1120327A (de)
DE (1) DE2861569D1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041198A1 (de) * 1980-06-04 1981-12-09 Hoechst Aktiengesellschaft Vorrichtung zum Abtragen von Entwicklerflüssigkeit von einem Aufzeichnungsmaterial
DE3510104A1 (de) * 1984-09-14 1986-03-27 Sanko Kikai Co., Ltd., Wakayama Rolle
US4749296A (en) * 1986-04-09 1988-06-07 Ta Triumph-Adler Aktiengesellschaft Platen for typewriters or similar machines
EP0590924A1 (de) * 1992-09-29 1994-04-06 Xerox Corporation Flexible Rohre, abgestützt auf starren Trommeln, und ihr Herstellungsverfahren
US5413810A (en) * 1994-01-03 1995-05-09 Xerox Corporation Fabricating electrostatographic imaging members
GB2283457A (en) * 1993-07-30 1995-05-10 Bestplate Limited Printing apparatus
US5443785A (en) * 1994-01-03 1995-08-22 Xerox Corporation Method of treating seamless belt substrates and carriers therefor
US5709765A (en) * 1994-10-31 1998-01-20 Xerox Corporation Flexible belt system

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
JPS589230Y2 (ja) * 1979-11-26 1983-02-19 コニカ株式会社 記録体保持装置
JPS5782879A (en) * 1980-11-12 1982-05-24 Mita Ind Co Ltd Photosensitive drum of electrostatic copier
JPS5886584A (ja) * 1981-11-19 1983-05-24 Konishiroku Photo Ind Co Ltd ドラム状像担持体部材
JPS59156812U (ja) * 1983-04-06 1984-10-22 株式会社デンソー 自動車用空調装置の通風ダクト

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US2986466A (en) * 1955-12-06 1961-05-30 Edward K Kaprelian Color electrophotography
DE1181237B (de) * 1962-04-11 1964-11-12 Zimmer Peter Verfahren und Einrichtung zur Herstellung einer nahtlosen, zylindrischen Druckschablone
DE1775267A1 (de) * 1967-07-26 1971-08-12 Zimmer Johannes Zylindrische Walze
DE2021409A1 (de) * 1970-04-30 1971-11-11 Agfa Gevaert Ag Elektrostatisches Kopiergeraet
US3695757A (en) * 1969-02-27 1972-10-03 Xerox Corp Xerographic plate
CH585352A5 (en) * 1976-04-20 1977-02-28 Ciba Geigy Ag Pressing or crushing roll for paper or textiles processing - comprising chamber for pressurised fluid between supporting core and flexible jacket

Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
US2986466A (en) * 1955-12-06 1961-05-30 Edward K Kaprelian Color electrophotography
DE1181237B (de) * 1962-04-11 1964-11-12 Zimmer Peter Verfahren und Einrichtung zur Herstellung einer nahtlosen, zylindrischen Druckschablone
DE1775267A1 (de) * 1967-07-26 1971-08-12 Zimmer Johannes Zylindrische Walze
US3695757A (en) * 1969-02-27 1972-10-03 Xerox Corp Xerographic plate
DE2021409A1 (de) * 1970-04-30 1971-11-11 Agfa Gevaert Ag Elektrostatisches Kopiergeraet
CH585352A5 (en) * 1976-04-20 1977-02-28 Ciba Geigy Ag Pressing or crushing roll for paper or textiles processing - comprising chamber for pressurised fluid between supporting core and flexible jacket

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041198A1 (de) * 1980-06-04 1981-12-09 Hoechst Aktiengesellschaft Vorrichtung zum Abtragen von Entwicklerflüssigkeit von einem Aufzeichnungsmaterial
DE3510104A1 (de) * 1984-09-14 1986-03-27 Sanko Kikai Co., Ltd., Wakayama Rolle
US4749296A (en) * 1986-04-09 1988-06-07 Ta Triumph-Adler Aktiengesellschaft Platen for typewriters or similar machines
EP0590924A1 (de) * 1992-09-29 1994-04-06 Xerox Corporation Flexible Rohre, abgestützt auf starren Trommeln, und ihr Herstellungsverfahren
US5518854A (en) * 1992-09-29 1996-05-21 Xerox Corporation Flexible tubes supported on rigid drum
GB2283457A (en) * 1993-07-30 1995-05-10 Bestplate Limited Printing apparatus
GB2283457B (en) * 1993-07-30 1996-06-26 Bestplate Limited Printing apparatus
US5413810A (en) * 1994-01-03 1995-05-09 Xerox Corporation Fabricating electrostatographic imaging members
US5443785A (en) * 1994-01-03 1995-08-22 Xerox Corporation Method of treating seamless belt substrates and carriers therefor
US5709765A (en) * 1994-10-31 1998-01-20 Xerox Corporation Flexible belt system

Also Published As

Publication number Publication date
JPS54130208A (en) 1979-10-09
EP0003051B1 (de) 1982-01-20
JPH0423271B2 (de) 1992-04-21
AU528151B2 (en) 1983-04-14
AU4313879A (en) 1979-07-05
CA1120327A (en) 1982-03-23
DE2861569D1 (en) 1982-03-04

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