CA1129247A - Fluid roller - Google Patents
Fluid rollerInfo
- Publication number
- CA1129247A CA1129247A CA344,204A CA344204A CA1129247A CA 1129247 A CA1129247 A CA 1129247A CA 344204 A CA344204 A CA 344204A CA 1129247 A CA1129247 A CA 1129247A
- Authority
- CA
- Canada
- Prior art keywords
- roller
- fluid
- cracks
- hard
- rollers
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N7/00—Shells for rollers of printing machines
- B41N7/04—Shells for rollers of printing machines for damping rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/02—Top layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/10—Location or type of the layers in shells for rollers of printing machines characterised by inorganic compounds, e.g. pigments
Landscapes
- Rolls And Other Rotary Bodies (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
- Rotary Presses (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A cylindrical roller body having a surface texture incorporating a random pattern of cracks and lands in a select configuration for producing a nonhomogeneous and noncontinuous roller surface having improved fluid transfer characteristics.
The roller is mounted for rotation contiguous with a fluid supply and deposit area for transferring fluid therebetween.
The body of the roller is of structurally sound construction, often solid, being plated with a hard, durable material such as chrome. The chrome is subjected to a specific plating, etching, and polishing process for producing an array of interconnected, shallow cracks and smooth, segrated lands thereupon. The cracked cylindrical surface of the roller then presents a plurality of smooth, unconnected lands to fluids dispersed thereon. Similarly, the interconnected crack pattern permits lateral flow of fluid between lands to reduce the surface tension and improve fluid transfer characteristics. In this manner, the roller may be used in any number of applications in conjunction with fluid supply means and deposit area. Like-wise, the roller can be used to transfer any fluid with more control, volumetric capacity and less surface tension dependency than conventional rollers of either greater smoothness or greater roughness.
A cylindrical roller body having a surface texture incorporating a random pattern of cracks and lands in a select configuration for producing a nonhomogeneous and noncontinuous roller surface having improved fluid transfer characteristics.
The roller is mounted for rotation contiguous with a fluid supply and deposit area for transferring fluid therebetween.
The body of the roller is of structurally sound construction, often solid, being plated with a hard, durable material such as chrome. The chrome is subjected to a specific plating, etching, and polishing process for producing an array of interconnected, shallow cracks and smooth, segrated lands thereupon. The cracked cylindrical surface of the roller then presents a plurality of smooth, unconnected lands to fluids dispersed thereon. Similarly, the interconnected crack pattern permits lateral flow of fluid between lands to reduce the surface tension and improve fluid transfer characteristics. In this manner, the roller may be used in any number of applications in conjunction with fluid supply means and deposit area. Like-wise, the roller can be used to transfer any fluid with more control, volumetric capacity and less surface tension dependency than conventional rollers of either greater smoothness or greater roughness.
Description
~1~9~47 BACKGROUND OF THE INVE~TION
______ __ ___ __ The present invention relates to rollers and, more particularly, to a hard surface fluid roller of the type having a random crack configuration formed in the surface thereof.
Fluid transfer with cylindrical rollers has for years been an integral element in various industrial fluid systems.
The precise roller design most often depends on the specific application, fluid viscosity, speed and related aspects. For example, fluid rollers are used in the printing industry in several distinct areas, ink is transferred over rollers in inking systems; fountain solutions are transferred over rollers in dampening systems; coatings, pigments and dyes are transferred directly to webs of paper, cloth and the like. This is but one example ofa class of fluid roller applications and, for purpose of example only, reference will be made herein to printing systems.
Still, said reference is for example only and is not meant to limit the scope of the present invention which finds application in the transfer of fluids of varying viscosities to a wide assort-ment of mediums.
Referring now to large lithographic printing presses in particular, a system of fluid dampening is generally utilized in conjunction with an inking system. The use of a dampening system requires controlled transfer of the dampening fluid through a plurality of rollers within the press. The transfer of the fluid must be in both controlled speed, thickness, and uniformity for printing quality and the elimination of streaks, runs, smudges, and other problems associated with lithographic printing.
{32~s7 The problem of fluid transfer control is not, however, limited to lithographic printing and is a specific requirement and need for many industries having various forms of roller applications.
One of the greatest problems of lithographic offset printing methods has been the application of moistening fluids to the surface of the lithographic printing plate in uniform and evenly distributed quantities and in regulated amounts so as the insure uniformly good quality reproduction o~ the printed image on the paper. A lithographic printing plate is a chemi-cally treated sheet of metal wherein the printing area is pro-vided to be ink receptive and the nonprinting area to be hydrophilic, or moisture receptive. It is therein necessary to apply a film of moistening fluid to the surface of the plate which is retained by the hydrophilic area, but is repelled by the printing area so that the printing area receives ink and the nonprinting area is separated and isolated from the ink by the film of moistening fluid.
The prior art has provided numerous forms of roller configurations and surface characteristics for the printing industry, included among these, a polished, chrome plated dam-pener transfer roller for use in lithographic dampening. Such a roller is disclosed and claimed in U. S. Patent No. 3,259,062 to Dahlgren. The following patents also disclose such roller designs: 3,647,525 to Dahlgren, 3,508,489 to Norton, 3,168,037 to Dahlgren, and 3,433, 155 to Norton.
The chrome plated roller generally described in the prior art incorporates a smooth, polished chrome plated surface being very hard in surface characteristic and very smooth f~
facilitating dispersion of a film of fluid thereupon.
~4 li;~9247 The utilization of the chrome plated hydrophilic transfer has thus found widespread acceptance in the printing industry, although certain requirements in the lithographic press are necessarily associated therewith. One such requirement is the utilization of a surfactant or wetting agent such as alcohol, in the dampening solution transferred by the transfer roller.
The use of alcohol reduces the surface tension of the dampening fluid permitting it to uniformly disperse itself across the polished, homogeneous surface of the subject roller. Alcohol has become however, very expensive and more scarce with contem-porary oil shortages.
The prior art of roller construction has also included rough surface rollers of the type shown and described in U. S.
Patent No. 3,285, 169 to Hartwig. Various rough surface rollers have also been disclosed with soft surface characteristics, although not as successful. The teachings of the Hartwig patent illustrate the advantages of certain aspects of hard, rough surface rollers such as an "Anilox" roll. One such advantage is the ability to carry greater fluid thicknesses due to the characteristic of the surface to fluid interface. The use of such prior art rough rollers produced real problems in operation. For example, such rollers are generally copper clad and surface plated which results in a surface which is easily damaged. Moreover, ink from the inking system often becomes embedded in the deep cracks on Anilox rollers. Other problems such as surface friction, emulsification, fluid tur-bulence and the resulting uniformity of flow has thus prompted the industry to utilize other transfer roller designs. The advent of the smooth, polished hard surface hydrophilic roller was thus a major development in that the critical disadvantages r~
11~9247 associated with rough rollers both hard and soft, were overcome.
However, elimination of the disadvantages also obviated many of the advantages of the rough surface roller in the system itself. The same holds true for related industrial roller uses and the need for an improved fluid transfer roller is critically felt.
In any fluid transfer system where fluid rollers rotate a~
different surface speeds, as is often the case for controlled operation, the surface configuration of the rollers has a direct bearing on the amount of energy consumed to impart rotation.
For example, a rough surface rolle~ rotating at a different speed than a contiguous roller in surface indented relationship therewith will obviously ~ave high frictional consid~raiions.
For this reason, hard polished rollers often require less dri-ving energy to operate against a pressure indented roller rotating at a different speed. Where viscous fluids, such as polymer coatings are being transferred, the surface friction is even greater and the need for quantity transfer more evident.
It would be an advantage therefore to provide the advan-tages of a rough surface roller in a roller construction having many of the advantages of the smooth polished roller. The roller construction of the present invention overcomes many of the problems of the prior art and provides a roller having a surface configuration facilitating fluid transfer having the advantageous features of many rough surface ~ollers and features of smooth polished hard surfaced rollers. The functional combi-nation is facilitated through the creation of precisely etched surface crack configurations in a very hard surface material uniformly disposed and polished about the roller. The nonuniform polished surface and interconnected cracks of the roller of the present invention provides vastly improved fluid transfer cha-racteristics with few of the conventionally associated problems.
C
112g247 SUMMARY OF THE INVENTION
The present invention relates to fluid transfermethods using cylindrical rollers, more particularly, one aspect of the invention includes an improved method of trans-ferring the fluid between hard and soft surfaced, cylindrical rollers in a fluid transfer system of the type wherein the hard surfaced roller is rotated relative to the soft surfaced roller in pressure indented relationship and fluid is passed therebetween. The improvement comprises the steps of providing a cylindrical core plated to a predetermined thickness with a hard surface material and adapted for rotat-able mounting as a hard surfaced roller in the fluid transfer systems. The core is etched to a predetermined depth to remove substantial portions of the plated material and impart a relatively dense, random pattern of relatively deep inter-connected cracks in the remaining surface. The surface of the etched core is polished to reduce the depth of the interconnected cracks to between .001 and .002 inches and the density of the interconnected cracks to between 9 and 26 percent of the surface area of the roller for producing a random pattern of isolated, smoothly finished lands between the cracks. The surface is cleaned to render it fluid receptive upon the polished surfaces of the lands in the interconnected cracks therebetween. The hard surfaced roller is then mounted in pressure indented rotational engagement with a soft surfaced roller and provided with a fluid to be transferred to the surface of one of the rollers for transfer thereupon. The hard and soft surfaced rollers are rotated to transfer fluid upon the surfaces thereof and pass the fluid between the rollers while imparting lateral fluid flow within the interconnected cracks of the hard surfaced roller to the fluid passing between the rollers for providing dynamic surface action and reducing laminar flow during the fluid transfer.
In another aspect, the above fluid transfer method includes the step of imparting lateral fluid flow between the hard and soft surfaced rollers while imparting turbulence to the fluid and mechanically reducing the surface tension of the fluid through fluid flow within the interconnected cracks. The hard surfaced material plated upon the core may be chromium wherein the step of etching includes emersing the core into hydrocloric acid ~o produce the random pattern of relatively deep interconnect~d cracks.
In yet another aspect of the invention, the density of the interconnected cracks comprise between 14 and 17 percent of the surface area of the roller and the density of the interconnected cracks comprise on the order of 15% of the surface area of the roller. The step of providing a cylindrical core plated to a predetermined thickness may also include providing a core plated to a thickness of chromium on the order of .020 inches and the step of etching the core may include electroetching the core to form the interconnected cracks at a depth on the order of .010 inches.
llZ9247 BRIEF DESCRIPTION OF THE DRAWINGS
.
For a more complete understanding of the present invention, and for further objects and advantages thereof, reference may be now had to the following description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a perspective view of one embodiment of a fluid transfer roller of the present invention in a specific fluid transfer application;
FIG. 2 is an enlarged cross~sectional view of the surface of the transfer roller of FIG.l, illustrating one embodiment of a crack pattern therein;
FIG. 3 is an enlarged, top plan view of the surface of the transfer roller of FIG.l illustratinq in more detail one crack pattern embodiment in accordance with the principles of the present invention;
FIG.4 is an alternative embodiment of the crack pattern illustrated in FIG. 3; and FIG. 5 is an enlarged, side elevational cross sectional view of the roller assembly of FIG. 1 illustrating the prin-ciple of fluid transfer therebetween.DETAILED DESCRIPTION OF THE DRAWINGS
Referring first to FIG. 1, there is shown one embodiment of a fluid roller 10 constructed in accordance with the prin-ciples of the present invention. The roller 10 is illustrated in pressure indented relationship with a second roller 12 for facilitating fluid transfer therebetween and to material web 13, in accordance with one illustrative application of the present invention.
~f 11~9Z~7 A surface crack pattern 14 may be seen upon the roller 10. The pattern 14 of the present invention is formed in a hard cylin-drical outer surface 16 of the roller 10 in a manner described below for imparting a select, non~continuous, non-homogeneous surface thereto. In a dynamic operation mode, the pattern 14 of the roller 10 then provides all the advantages of both a con-tinuous, smoothly polished roller and a rough, knurled, or "Anilox" roller, without the associated disadvantages of either.
For example, the surface 16 is hard and impervious to "dings"
while exhibiting surface indentations in the form of the pattern 14.
Referring now to FIG. 2 there is shown an enlarged side elevational cross sectional view of the surface 16 and pattern 14 of the roller 10 of FIG. 1. It may be seen that the pattern 14 is comprised of a vast, interconnected array of channels, or cracks 18 formed in the surface 16 and extending therein a gene-rally predefined depth and width. Between adjacent cracks 18 polished lands 20 form the surface of the roller 10. Each land 20 is segregated by the random patterns of cracks 18 isolating one land 20 from another and permitting fluid flow therebetween.
In this manner the surface 16 of the roller 10 exhibits a non-continuous, non-homogeneous surface to fluids dispersed thereon.
Fluids deposited on the surface in either a static or dynamic mode will exhibit certain phenomena of rheology not characte-ristic or either smooth or rough surfaces. For example, a dropof water placed upon stationary prior art rollers will generally "bead up" unless treated with a wetting agent to reduce surface tension.
a~
~1~9Z47 That same drop of water has been well dispersed across the sur-face 16 of the roller 10 of the present invention as though a wetting agent were present because of the interconnected cracks 18 which mechanically break down said surface tension. This phenomena has equally startling results when incorporated in a dynamic mode as described in more detail below.
Referring now to FIG. 3, there is shown an enlarged top plan view of a section of the surface 16 of the roller 10 of FIG. 1 in accordance with the principles of the present invention.
The cracks 18 may be seen to be in a random pattern of generally uniform width and isolation relative to the lands 20. As used herein, the term "random pattern" refers to the interconnected, crack configuration providing the non-continuous, non-homogeneous surface shown and described herein. The cracks are random in configuration because of the formation process. However they form a pattern of isolated lands 20 in a carefully controlled ratio of crack size and quantity to land area. This aspect has been found to be of critical im~ort in the construction of the present invention. Another critical aspect shown in this figure is the density of cracks 18 relative to the smooth lands 20.
The crack density illustrated in FIG. 3 is between 14 and 17 percent, and more particularly, on the order of 15% which has been found to be preferable relative to dynamic operation modes transferring relatively non-viscous fluids such as water. A
crack depth of .001 to .002 inches and similar width has likewise been found to produce optimal results.
.~
11292~7 Referring now to FIG. 4, there is shown an alternative crack pattern density on the order of 20 percent. It may be seen that the density figure is an average which denotes the surface discontinuity relative to the smooth lands 20. The size of the cracks 18 is preferably not effected. It has been found, however, that as the crack density increases the tendency for pitted, shallow, crack areas in the lands 20. This condition, when not controlled to produce the smooth lands 20 shown in FIG. 3, is a deviation from the crack pattern 14 of the present invention and may result in a pitted roller surface much like earlier prior art roller designs not affording the fluid transfer characteristic of the present invention. Pitted surfaces of certain prior art rollers do not exhibit lateral fluid flow in the cracks because they are not interconnected. In the dynamic mode, this aspect facilitates fluid transfer from fluid supply means provided under pressure, such as pressure indented rollers. The term "pressure indented" as used herein refers to that loading condition between rollers wherein the surface profile of one or both is effected, or indented, by the overlapping roller positions. In like manner, ~0 the crack pattern 14 facilitates deposit of the fluid to the particular medium to which it is transferred because said fluid is always flowing within the crack pattern 14.
Referring now to FIG. 5 there is shown an enlarged,dia-grammatic view of one embodiment of the operation of the roller 10 of the present invention. Fluid is brought to the roller 10 by a second roller 22.
C
11;~9247 This operation configuration is for purposes of example only;
any suitable means for providing fluid to the roller 10 would be sufficient. It has been found optional to supply said fluid under pressure and other means (not shown) may be provided for said pressure arrangement. The second roller 22 conventionally has a soft outer surface 24 for engaging the hard roller 10 in pressure indented relationships, as shown a~ interface 26. A
supply nip 28 of fluid 30 is formed at the juncture of the two rollers. Fluid 30 is then squeezed through the roller interface 26 and transferred along the roller 10. It is at this point in the fluid transfer process that the advantages or problems of the particular hard surfaced`roller are conventionally mani-fested. The thickness of the resulting fluid film 32 on the roller of the present invention has been shown in tests to be both more uniform and greater in size than many other prior art hard surfaced rollers. This is not to say, however, that certain individual fluid transfer characteristics, such as film thickness could not be matched by select prior art roller designs, but such prior art designs also effect other transfer characteristics previously discussed. For example, an "Anilox" roller will transfer thicker film or fluid but often at lesser quality and efficiency than polished hydrophylic rollers. Aside from the fragility of copper clad plated rollers, when the surface tex-ture of such a "rough" roller exceeds a critical value, differential drive forces between rollers become a problem and residue can build up in the cracks or pitted areas.
11;~9247 MANUFACTURE: The manufacture of the roller 10 of the present invention incorporates various techniques of plating and etching some of which have been found successful in fabrieating the oppo-site configuration to the roller 10 of the present invention:
hollow piston cylinders for engines. The cracks in such instances are formed on the inside cylinder walls and are usually very deep to carry oil for purposes of lubrication. Such methods have been used and taught by various industrial plating companies wherein chrome and iron plating is formed with crack patterns of varying configurations and degrees. The crack pattern des-cribed for piston cylinders enables the piston walls to exhibit "pockets" for holding oil and reducing friction and wear. The "pores", as they are often referred to, are electrically etched into the hard metal surface. The plateaus, or lands 20, between 15 the pores are honed or polished to provide a true bearing sur- , face. Various electroplating-etching processes have been incor-porated to provide the necessary surface smoothness porosity characteristics. Since the surface characteristics of this pro-cess have not been directed to date toward fluid transfer rollers as described herein, the design parameters,or crack pattern 14, have not been heretofore established and the prior art has not recognized the viability of such an approach to a fluid transfer roller.
The particular crack pattern 14 described herein for the 25 roller 10 has been shown by testing to be of synergistic genesis.
The rheology characteristics are neither like those of the smooth or rough surface rollers of the prior art variety.
11;~9~47 Likewise, alterations of crack density, dimension and configuration as defined herein, have shown to exhibit few of the advantageous characteristics without the creation of critical disadvantages. Therefore, while the process of fabricating the roller 10 in accordance with the principles of the present invention is only generally set forth as to process steps, these steps will enable a man skilled in the art to produce the roller of the present invention when directing the process specifically to the pattern 14 specif-ications herein defined. For purposes of example only, Electro-Plating, Inc. of Houston, Texas has been able to produce the specific roller configuration herein defined when incorporating the below enumerated steps. It should be noted however, that the fabrication of pattern 14 of the roller 10 is achieved in part, at least, through artisan skills in producing the intended and defined crack pattern and surface condition described. The following process steps are thus enabling to one so skilled in the art:
First, a cylindrical core is prepared for plating with chromium or the like. The core is precisely aligned relative to the plating anode for uniform plating there-around. When the plated metal reaches a pre-determined thickness on the order of up to .020 inches it is then electroetched, as that term is known in the industry, wherein the plating current is reversed to remove, portions of the plated material. The interconnected cracks 18 must be formed at this time and generally extend into the surface 14 a distance on the order of .010 inches, depending on the thickness thereof.
11~'32~a7 The etched roller is then honed or polished on a lathe or the like to reduce the plating thickness, critically define the surface dimension and configuration and produce the smooth uni-form lands 20 and uniform crack depth in the configuration illus-trated in FIGS. 1-4 and heretofore defined. The etching and polishing step must be coordinated to produce a crack pattern 14 as defined herein rather than conventional etched porosity and/
or random crack depth density configurations. A crack depth between .001 and .003 inches, has been found satisfactory. For this reason the initial thickness of the plated metal upon the cylinder core is often greater than usual for conventional plated surfaces, the etching more controlled and the polishing critically coordinated to the aforesaid pattern.
OPERATION: In operation the roller 10 is prepared for its particular application by again etching the roller 20 with a suitable agent such as hydrochloric acid for chrome surfaces, in order to render all surfaces, lands 20 and cracks 18 fluid re-ceptive. The roller ]0 is then mounted for rotation in the particular systerl adjacent a fluid supply and deposit area for transfer therebetween. As shown in FIG. 1 roller 10 may be disposed against a soft surface roller, and each driven inde-pendently of the other, or in unison. It has been found that a degree of turbulence is imparted to the fluid film through the rotational interface 26. The turbulence due in part to lateral fluid flow in the cracks 18 substantially reduces the laminar flow problems generally associated with smoothly fini-shed rollers. For example, fluid rings or ridges can build up in laminar fluid transfer on smooth, continuous hydrophilic surfaces.
~V
11;~9,'~7 The crack pattern 14 of the present invention alleviates such rings through dynamic surface action. This aspect is particu-larly useful in lithographic dampening systems where alcohol i~
often utilized in the dampening fluid or fountain solution to reduce surface tension. The use of the crack pattern 14 of the roller 10 reduces the need for alcohol, and such wetting agents thus improving cost effectiveness in the system of appli-cation.
In summary, the method and apparatus of the present inven-tion provides a means for improving the transferability of fluid with fluid rollers. For a given fluid viscosity, roller speed and drive horsepower the roller 10 of the present invention will provide a more uniform transfer of fluid with substantially fewer transfer problems than with prior art apparatus. Additionally, more viscous fluids can be transferred with the rollers of the present invention than deemed operable by most prior art methods and apparatus. It is thus believed that the operation and con-struction of the present invention will be apparent from the foregoing description. While the apparatus as shown and des-cribed has been characterized as being preferred it will be obvious that various changes and modifications may be made - therein without departing from the spirit and scope of the invention as defined in the following claims.
.~
______ __ ___ __ The present invention relates to rollers and, more particularly, to a hard surface fluid roller of the type having a random crack configuration formed in the surface thereof.
Fluid transfer with cylindrical rollers has for years been an integral element in various industrial fluid systems.
The precise roller design most often depends on the specific application, fluid viscosity, speed and related aspects. For example, fluid rollers are used in the printing industry in several distinct areas, ink is transferred over rollers in inking systems; fountain solutions are transferred over rollers in dampening systems; coatings, pigments and dyes are transferred directly to webs of paper, cloth and the like. This is but one example ofa class of fluid roller applications and, for purpose of example only, reference will be made herein to printing systems.
Still, said reference is for example only and is not meant to limit the scope of the present invention which finds application in the transfer of fluids of varying viscosities to a wide assort-ment of mediums.
Referring now to large lithographic printing presses in particular, a system of fluid dampening is generally utilized in conjunction with an inking system. The use of a dampening system requires controlled transfer of the dampening fluid through a plurality of rollers within the press. The transfer of the fluid must be in both controlled speed, thickness, and uniformity for printing quality and the elimination of streaks, runs, smudges, and other problems associated with lithographic printing.
{32~s7 The problem of fluid transfer control is not, however, limited to lithographic printing and is a specific requirement and need for many industries having various forms of roller applications.
One of the greatest problems of lithographic offset printing methods has been the application of moistening fluids to the surface of the lithographic printing plate in uniform and evenly distributed quantities and in regulated amounts so as the insure uniformly good quality reproduction o~ the printed image on the paper. A lithographic printing plate is a chemi-cally treated sheet of metal wherein the printing area is pro-vided to be ink receptive and the nonprinting area to be hydrophilic, or moisture receptive. It is therein necessary to apply a film of moistening fluid to the surface of the plate which is retained by the hydrophilic area, but is repelled by the printing area so that the printing area receives ink and the nonprinting area is separated and isolated from the ink by the film of moistening fluid.
The prior art has provided numerous forms of roller configurations and surface characteristics for the printing industry, included among these, a polished, chrome plated dam-pener transfer roller for use in lithographic dampening. Such a roller is disclosed and claimed in U. S. Patent No. 3,259,062 to Dahlgren. The following patents also disclose such roller designs: 3,647,525 to Dahlgren, 3,508,489 to Norton, 3,168,037 to Dahlgren, and 3,433, 155 to Norton.
The chrome plated roller generally described in the prior art incorporates a smooth, polished chrome plated surface being very hard in surface characteristic and very smooth f~
facilitating dispersion of a film of fluid thereupon.
~4 li;~9247 The utilization of the chrome plated hydrophilic transfer has thus found widespread acceptance in the printing industry, although certain requirements in the lithographic press are necessarily associated therewith. One such requirement is the utilization of a surfactant or wetting agent such as alcohol, in the dampening solution transferred by the transfer roller.
The use of alcohol reduces the surface tension of the dampening fluid permitting it to uniformly disperse itself across the polished, homogeneous surface of the subject roller. Alcohol has become however, very expensive and more scarce with contem-porary oil shortages.
The prior art of roller construction has also included rough surface rollers of the type shown and described in U. S.
Patent No. 3,285, 169 to Hartwig. Various rough surface rollers have also been disclosed with soft surface characteristics, although not as successful. The teachings of the Hartwig patent illustrate the advantages of certain aspects of hard, rough surface rollers such as an "Anilox" roll. One such advantage is the ability to carry greater fluid thicknesses due to the characteristic of the surface to fluid interface. The use of such prior art rough rollers produced real problems in operation. For example, such rollers are generally copper clad and surface plated which results in a surface which is easily damaged. Moreover, ink from the inking system often becomes embedded in the deep cracks on Anilox rollers. Other problems such as surface friction, emulsification, fluid tur-bulence and the resulting uniformity of flow has thus prompted the industry to utilize other transfer roller designs. The advent of the smooth, polished hard surface hydrophilic roller was thus a major development in that the critical disadvantages r~
11~9247 associated with rough rollers both hard and soft, were overcome.
However, elimination of the disadvantages also obviated many of the advantages of the rough surface roller in the system itself. The same holds true for related industrial roller uses and the need for an improved fluid transfer roller is critically felt.
In any fluid transfer system where fluid rollers rotate a~
different surface speeds, as is often the case for controlled operation, the surface configuration of the rollers has a direct bearing on the amount of energy consumed to impart rotation.
For example, a rough surface rolle~ rotating at a different speed than a contiguous roller in surface indented relationship therewith will obviously ~ave high frictional consid~raiions.
For this reason, hard polished rollers often require less dri-ving energy to operate against a pressure indented roller rotating at a different speed. Where viscous fluids, such as polymer coatings are being transferred, the surface friction is even greater and the need for quantity transfer more evident.
It would be an advantage therefore to provide the advan-tages of a rough surface roller in a roller construction having many of the advantages of the smooth polished roller. The roller construction of the present invention overcomes many of the problems of the prior art and provides a roller having a surface configuration facilitating fluid transfer having the advantageous features of many rough surface ~ollers and features of smooth polished hard surfaced rollers. The functional combi-nation is facilitated through the creation of precisely etched surface crack configurations in a very hard surface material uniformly disposed and polished about the roller. The nonuniform polished surface and interconnected cracks of the roller of the present invention provides vastly improved fluid transfer cha-racteristics with few of the conventionally associated problems.
C
112g247 SUMMARY OF THE INVENTION
The present invention relates to fluid transfermethods using cylindrical rollers, more particularly, one aspect of the invention includes an improved method of trans-ferring the fluid between hard and soft surfaced, cylindrical rollers in a fluid transfer system of the type wherein the hard surfaced roller is rotated relative to the soft surfaced roller in pressure indented relationship and fluid is passed therebetween. The improvement comprises the steps of providing a cylindrical core plated to a predetermined thickness with a hard surface material and adapted for rotat-able mounting as a hard surfaced roller in the fluid transfer systems. The core is etched to a predetermined depth to remove substantial portions of the plated material and impart a relatively dense, random pattern of relatively deep inter-connected cracks in the remaining surface. The surface of the etched core is polished to reduce the depth of the interconnected cracks to between .001 and .002 inches and the density of the interconnected cracks to between 9 and 26 percent of the surface area of the roller for producing a random pattern of isolated, smoothly finished lands between the cracks. The surface is cleaned to render it fluid receptive upon the polished surfaces of the lands in the interconnected cracks therebetween. The hard surfaced roller is then mounted in pressure indented rotational engagement with a soft surfaced roller and provided with a fluid to be transferred to the surface of one of the rollers for transfer thereupon. The hard and soft surfaced rollers are rotated to transfer fluid upon the surfaces thereof and pass the fluid between the rollers while imparting lateral fluid flow within the interconnected cracks of the hard surfaced roller to the fluid passing between the rollers for providing dynamic surface action and reducing laminar flow during the fluid transfer.
In another aspect, the above fluid transfer method includes the step of imparting lateral fluid flow between the hard and soft surfaced rollers while imparting turbulence to the fluid and mechanically reducing the surface tension of the fluid through fluid flow within the interconnected cracks. The hard surfaced material plated upon the core may be chromium wherein the step of etching includes emersing the core into hydrocloric acid ~o produce the random pattern of relatively deep interconnect~d cracks.
In yet another aspect of the invention, the density of the interconnected cracks comprise between 14 and 17 percent of the surface area of the roller and the density of the interconnected cracks comprise on the order of 15% of the surface area of the roller. The step of providing a cylindrical core plated to a predetermined thickness may also include providing a core plated to a thickness of chromium on the order of .020 inches and the step of etching the core may include electroetching the core to form the interconnected cracks at a depth on the order of .010 inches.
llZ9247 BRIEF DESCRIPTION OF THE DRAWINGS
.
For a more complete understanding of the present invention, and for further objects and advantages thereof, reference may be now had to the following description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a perspective view of one embodiment of a fluid transfer roller of the present invention in a specific fluid transfer application;
FIG. 2 is an enlarged cross~sectional view of the surface of the transfer roller of FIG.l, illustrating one embodiment of a crack pattern therein;
FIG. 3 is an enlarged, top plan view of the surface of the transfer roller of FIG.l illustratinq in more detail one crack pattern embodiment in accordance with the principles of the present invention;
FIG.4 is an alternative embodiment of the crack pattern illustrated in FIG. 3; and FIG. 5 is an enlarged, side elevational cross sectional view of the roller assembly of FIG. 1 illustrating the prin-ciple of fluid transfer therebetween.DETAILED DESCRIPTION OF THE DRAWINGS
Referring first to FIG. 1, there is shown one embodiment of a fluid roller 10 constructed in accordance with the prin-ciples of the present invention. The roller 10 is illustrated in pressure indented relationship with a second roller 12 for facilitating fluid transfer therebetween and to material web 13, in accordance with one illustrative application of the present invention.
~f 11~9Z~7 A surface crack pattern 14 may be seen upon the roller 10. The pattern 14 of the present invention is formed in a hard cylin-drical outer surface 16 of the roller 10 in a manner described below for imparting a select, non~continuous, non-homogeneous surface thereto. In a dynamic operation mode, the pattern 14 of the roller 10 then provides all the advantages of both a con-tinuous, smoothly polished roller and a rough, knurled, or "Anilox" roller, without the associated disadvantages of either.
For example, the surface 16 is hard and impervious to "dings"
while exhibiting surface indentations in the form of the pattern 14.
Referring now to FIG. 2 there is shown an enlarged side elevational cross sectional view of the surface 16 and pattern 14 of the roller 10 of FIG. 1. It may be seen that the pattern 14 is comprised of a vast, interconnected array of channels, or cracks 18 formed in the surface 16 and extending therein a gene-rally predefined depth and width. Between adjacent cracks 18 polished lands 20 form the surface of the roller 10. Each land 20 is segregated by the random patterns of cracks 18 isolating one land 20 from another and permitting fluid flow therebetween.
In this manner the surface 16 of the roller 10 exhibits a non-continuous, non-homogeneous surface to fluids dispersed thereon.
Fluids deposited on the surface in either a static or dynamic mode will exhibit certain phenomena of rheology not characte-ristic or either smooth or rough surfaces. For example, a dropof water placed upon stationary prior art rollers will generally "bead up" unless treated with a wetting agent to reduce surface tension.
a~
~1~9Z47 That same drop of water has been well dispersed across the sur-face 16 of the roller 10 of the present invention as though a wetting agent were present because of the interconnected cracks 18 which mechanically break down said surface tension. This phenomena has equally startling results when incorporated in a dynamic mode as described in more detail below.
Referring now to FIG. 3, there is shown an enlarged top plan view of a section of the surface 16 of the roller 10 of FIG. 1 in accordance with the principles of the present invention.
The cracks 18 may be seen to be in a random pattern of generally uniform width and isolation relative to the lands 20. As used herein, the term "random pattern" refers to the interconnected, crack configuration providing the non-continuous, non-homogeneous surface shown and described herein. The cracks are random in configuration because of the formation process. However they form a pattern of isolated lands 20 in a carefully controlled ratio of crack size and quantity to land area. This aspect has been found to be of critical im~ort in the construction of the present invention. Another critical aspect shown in this figure is the density of cracks 18 relative to the smooth lands 20.
The crack density illustrated in FIG. 3 is between 14 and 17 percent, and more particularly, on the order of 15% which has been found to be preferable relative to dynamic operation modes transferring relatively non-viscous fluids such as water. A
crack depth of .001 to .002 inches and similar width has likewise been found to produce optimal results.
.~
11292~7 Referring now to FIG. 4, there is shown an alternative crack pattern density on the order of 20 percent. It may be seen that the density figure is an average which denotes the surface discontinuity relative to the smooth lands 20. The size of the cracks 18 is preferably not effected. It has been found, however, that as the crack density increases the tendency for pitted, shallow, crack areas in the lands 20. This condition, when not controlled to produce the smooth lands 20 shown in FIG. 3, is a deviation from the crack pattern 14 of the present invention and may result in a pitted roller surface much like earlier prior art roller designs not affording the fluid transfer characteristic of the present invention. Pitted surfaces of certain prior art rollers do not exhibit lateral fluid flow in the cracks because they are not interconnected. In the dynamic mode, this aspect facilitates fluid transfer from fluid supply means provided under pressure, such as pressure indented rollers. The term "pressure indented" as used herein refers to that loading condition between rollers wherein the surface profile of one or both is effected, or indented, by the overlapping roller positions. In like manner, ~0 the crack pattern 14 facilitates deposit of the fluid to the particular medium to which it is transferred because said fluid is always flowing within the crack pattern 14.
Referring now to FIG. 5 there is shown an enlarged,dia-grammatic view of one embodiment of the operation of the roller 10 of the present invention. Fluid is brought to the roller 10 by a second roller 22.
C
11;~9247 This operation configuration is for purposes of example only;
any suitable means for providing fluid to the roller 10 would be sufficient. It has been found optional to supply said fluid under pressure and other means (not shown) may be provided for said pressure arrangement. The second roller 22 conventionally has a soft outer surface 24 for engaging the hard roller 10 in pressure indented relationships, as shown a~ interface 26. A
supply nip 28 of fluid 30 is formed at the juncture of the two rollers. Fluid 30 is then squeezed through the roller interface 26 and transferred along the roller 10. It is at this point in the fluid transfer process that the advantages or problems of the particular hard surfaced`roller are conventionally mani-fested. The thickness of the resulting fluid film 32 on the roller of the present invention has been shown in tests to be both more uniform and greater in size than many other prior art hard surfaced rollers. This is not to say, however, that certain individual fluid transfer characteristics, such as film thickness could not be matched by select prior art roller designs, but such prior art designs also effect other transfer characteristics previously discussed. For example, an "Anilox" roller will transfer thicker film or fluid but often at lesser quality and efficiency than polished hydrophylic rollers. Aside from the fragility of copper clad plated rollers, when the surface tex-ture of such a "rough" roller exceeds a critical value, differential drive forces between rollers become a problem and residue can build up in the cracks or pitted areas.
11;~9247 MANUFACTURE: The manufacture of the roller 10 of the present invention incorporates various techniques of plating and etching some of which have been found successful in fabrieating the oppo-site configuration to the roller 10 of the present invention:
hollow piston cylinders for engines. The cracks in such instances are formed on the inside cylinder walls and are usually very deep to carry oil for purposes of lubrication. Such methods have been used and taught by various industrial plating companies wherein chrome and iron plating is formed with crack patterns of varying configurations and degrees. The crack pattern des-cribed for piston cylinders enables the piston walls to exhibit "pockets" for holding oil and reducing friction and wear. The "pores", as they are often referred to, are electrically etched into the hard metal surface. The plateaus, or lands 20, between 15 the pores are honed or polished to provide a true bearing sur- , face. Various electroplating-etching processes have been incor-porated to provide the necessary surface smoothness porosity characteristics. Since the surface characteristics of this pro-cess have not been directed to date toward fluid transfer rollers as described herein, the design parameters,or crack pattern 14, have not been heretofore established and the prior art has not recognized the viability of such an approach to a fluid transfer roller.
The particular crack pattern 14 described herein for the 25 roller 10 has been shown by testing to be of synergistic genesis.
The rheology characteristics are neither like those of the smooth or rough surface rollers of the prior art variety.
11;~9~47 Likewise, alterations of crack density, dimension and configuration as defined herein, have shown to exhibit few of the advantageous characteristics without the creation of critical disadvantages. Therefore, while the process of fabricating the roller 10 in accordance with the principles of the present invention is only generally set forth as to process steps, these steps will enable a man skilled in the art to produce the roller of the present invention when directing the process specifically to the pattern 14 specif-ications herein defined. For purposes of example only, Electro-Plating, Inc. of Houston, Texas has been able to produce the specific roller configuration herein defined when incorporating the below enumerated steps. It should be noted however, that the fabrication of pattern 14 of the roller 10 is achieved in part, at least, through artisan skills in producing the intended and defined crack pattern and surface condition described. The following process steps are thus enabling to one so skilled in the art:
First, a cylindrical core is prepared for plating with chromium or the like. The core is precisely aligned relative to the plating anode for uniform plating there-around. When the plated metal reaches a pre-determined thickness on the order of up to .020 inches it is then electroetched, as that term is known in the industry, wherein the plating current is reversed to remove, portions of the plated material. The interconnected cracks 18 must be formed at this time and generally extend into the surface 14 a distance on the order of .010 inches, depending on the thickness thereof.
11~'32~a7 The etched roller is then honed or polished on a lathe or the like to reduce the plating thickness, critically define the surface dimension and configuration and produce the smooth uni-form lands 20 and uniform crack depth in the configuration illus-trated in FIGS. 1-4 and heretofore defined. The etching and polishing step must be coordinated to produce a crack pattern 14 as defined herein rather than conventional etched porosity and/
or random crack depth density configurations. A crack depth between .001 and .003 inches, has been found satisfactory. For this reason the initial thickness of the plated metal upon the cylinder core is often greater than usual for conventional plated surfaces, the etching more controlled and the polishing critically coordinated to the aforesaid pattern.
OPERATION: In operation the roller 10 is prepared for its particular application by again etching the roller 20 with a suitable agent such as hydrochloric acid for chrome surfaces, in order to render all surfaces, lands 20 and cracks 18 fluid re-ceptive. The roller ]0 is then mounted for rotation in the particular systerl adjacent a fluid supply and deposit area for transfer therebetween. As shown in FIG. 1 roller 10 may be disposed against a soft surface roller, and each driven inde-pendently of the other, or in unison. It has been found that a degree of turbulence is imparted to the fluid film through the rotational interface 26. The turbulence due in part to lateral fluid flow in the cracks 18 substantially reduces the laminar flow problems generally associated with smoothly fini-shed rollers. For example, fluid rings or ridges can build up in laminar fluid transfer on smooth, continuous hydrophilic surfaces.
~V
11;~9,'~7 The crack pattern 14 of the present invention alleviates such rings through dynamic surface action. This aspect is particu-larly useful in lithographic dampening systems where alcohol i~
often utilized in the dampening fluid or fountain solution to reduce surface tension. The use of the crack pattern 14 of the roller 10 reduces the need for alcohol, and such wetting agents thus improving cost effectiveness in the system of appli-cation.
In summary, the method and apparatus of the present inven-tion provides a means for improving the transferability of fluid with fluid rollers. For a given fluid viscosity, roller speed and drive horsepower the roller 10 of the present invention will provide a more uniform transfer of fluid with substantially fewer transfer problems than with prior art apparatus. Additionally, more viscous fluids can be transferred with the rollers of the present invention than deemed operable by most prior art methods and apparatus. It is thus believed that the operation and con-struction of the present invention will be apparent from the foregoing description. While the apparatus as shown and des-cribed has been characterized as being preferred it will be obvious that various changes and modifications may be made - therein without departing from the spirit and scope of the invention as defined in the following claims.
.~
Claims
CLAIMS:
-- 1. An improved method of transferring fluid between hard and soft surfaces, cylindrical rollers in a fluid transfer system of the type wherein the hard surfaced roller is rotated relative to the soft surfaced roller in pressure indented relationship and fluid is passed therebetween, said improvement comprising the steps of:
providing a cylindrical core plated to a predetermined thickness with a hard surface material and adapted for rotatable mounting as a hard surfaced roller in the fluid transfer system;
etching the plated core to a prdetermined depth to remove substantial portions of the plated material and impart a relatively dense, random pattern of relatively deep intercon-nected cracks in the remaining surface of the core;
polishing the surface of the etched core to reduce the depth of the interconnected cracks to between .001 and .002 inches and the density of the interconnected cracks to between 9 and 26 percent of the surface area of the roller for producing a random pattern of isolated, smoothly finished lands between the cracks;
cleaning the surface of the hard surfaced roller to render it fluid receptive upon the polished surfaces of the lands in the interconnected cracks therebetween;
mounting the hard surfaced roller in pressure indented rotational engagement with a soft surfaced roller and providing a fluid to be transferred to the surface of one of the rollers for transfer thereupon;
rotating the hard and soft surfaced rollers to transfer fluid upon the surfaces thereof and pass the fluid between the rollers; and imparting lateral fluid flow within the interconnected cracks of the hard surfaced roller to the fluid passing between the rollers for providing dynamic surface action and reducing laminar flow during the fluid transfer.---- 2. The method set forth in Claim 1 wherein the step of imparting lateral fluid flow between said hard and soft surfaced rollers includes the step of imparting turbulence to the fluid and mechanically reducing the surface tension of the fluid through fluid flow within the interconnected cracks.---- 3. The method set forth in Claim 1 wherein the hard surfaced material plated upon the core is chromium and the step of etching includes emersing the core into hydrochloric acid to produce the random pattern of relatively deep interconnected cracks.---- 4. The method set forth in Claim 1 wherein the density of the interconnected cracks comprise between 14 and 17 percent of the surface area of the roller.
-- 5. The method set forth in Claim 4 wherein the density of the interconnected cracks comprise on the order of 15% of the surface area of the roller.---- 6. The method set forth in Claim 1 wherein the step of providing a cylindrical core plated to a predetermined thickness includes providing a core plated to a thickness of chromium on the order of .020 inches and the step of etching the core inclu-des electroetching the core to form the interconnected cracks at a depth on the order of .010 inches.--
-- 1. An improved method of transferring fluid between hard and soft surfaces, cylindrical rollers in a fluid transfer system of the type wherein the hard surfaced roller is rotated relative to the soft surfaced roller in pressure indented relationship and fluid is passed therebetween, said improvement comprising the steps of:
providing a cylindrical core plated to a predetermined thickness with a hard surface material and adapted for rotatable mounting as a hard surfaced roller in the fluid transfer system;
etching the plated core to a prdetermined depth to remove substantial portions of the plated material and impart a relatively dense, random pattern of relatively deep intercon-nected cracks in the remaining surface of the core;
polishing the surface of the etched core to reduce the depth of the interconnected cracks to between .001 and .002 inches and the density of the interconnected cracks to between 9 and 26 percent of the surface area of the roller for producing a random pattern of isolated, smoothly finished lands between the cracks;
cleaning the surface of the hard surfaced roller to render it fluid receptive upon the polished surfaces of the lands in the interconnected cracks therebetween;
mounting the hard surfaced roller in pressure indented rotational engagement with a soft surfaced roller and providing a fluid to be transferred to the surface of one of the rollers for transfer thereupon;
rotating the hard and soft surfaced rollers to transfer fluid upon the surfaces thereof and pass the fluid between the rollers; and imparting lateral fluid flow within the interconnected cracks of the hard surfaced roller to the fluid passing between the rollers for providing dynamic surface action and reducing laminar flow during the fluid transfer.---- 2. The method set forth in Claim 1 wherein the step of imparting lateral fluid flow between said hard and soft surfaced rollers includes the step of imparting turbulence to the fluid and mechanically reducing the surface tension of the fluid through fluid flow within the interconnected cracks.---- 3. The method set forth in Claim 1 wherein the hard surfaced material plated upon the core is chromium and the step of etching includes emersing the core into hydrochloric acid to produce the random pattern of relatively deep interconnected cracks.---- 4. The method set forth in Claim 1 wherein the density of the interconnected cracks comprise between 14 and 17 percent of the surface area of the roller.
-- 5. The method set forth in Claim 4 wherein the density of the interconnected cracks comprise on the order of 15% of the surface area of the roller.---- 6. The method set forth in Claim 1 wherein the step of providing a cylindrical core plated to a predetermined thickness includes providing a core plated to a thickness of chromium on the order of .020 inches and the step of etching the core inclu-des electroetching the core to form the interconnected cracks at a depth on the order of .010 inches.--
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US1533179A | 1979-02-26 | 1979-02-26 | |
| US015,331 | 1979-02-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1129247A true CA1129247A (en) | 1982-08-10 |
Family
ID=21770798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA344,204A Expired CA1129247A (en) | 1979-02-26 | 1980-01-22 | Fluid roller |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS55117688A (en) |
| BE (1) | BE881900A (en) |
| CA (1) | CA1129247A (en) |
| DD (1) | DD149186A5 (en) |
| DE (1) | DE3004295A1 (en) |
| FR (1) | FR2449484A1 (en) |
| GB (1) | GB2044398B (en) |
| NL (1) | NL8000747A (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59185649A (en) * | 1983-04-07 | 1984-10-22 | Komori Printing Mach Co Ltd | Dampening apparatus of planographic printing press |
| JPS60250993A (en) * | 1984-05-29 | 1985-12-11 | Meiwa Gomme Kogyo Kk | Ink-supplying roller in inking device |
| JPS60253703A (en) * | 1984-05-31 | 1985-12-14 | Nissan Motor Co Ltd | Low nox combustion method |
| JP2802073B2 (en) * | 1987-07-10 | 1998-09-21 | 株式会社金陽社 | Manufacturing method of ink transfer roll |
| GB2213406B (en) * | 1987-12-08 | 1992-05-20 | Molins Plc | Coating apparatus and method |
| JPH042633U (en) * | 1990-04-23 | 1992-01-10 | ||
| JP2931719B2 (en) * | 1992-07-09 | 1999-08-09 | 株式会社金陽社 | Printing roller and manufacturing method thereof |
| DE102006015481B4 (en) * | 2006-01-04 | 2009-07-09 | Koenig & Bauer Aktiengesellschaft | Roller of a printing machine |
| WO2007134919A1 (en) | 2006-05-23 | 2007-11-29 | Koenig & Bauer Aktiengesellschaft | Inking unit of a rotary press, comprising a film roller |
| DE102006042590B4 (en) * | 2006-09-11 | 2009-12-17 | Koenig & Bauer Aktiengesellschaft | Rotary printing machine with at least one color flow separation roller having inking unit |
| WO2007135155A2 (en) | 2006-05-23 | 2007-11-29 | Koenig & Bauer Aktiengesellschaft | Assemblies in the printing unit of a rotary press |
| TWI461306B (en) * | 2006-07-19 | 2014-11-21 | Boettcher Gmbh & Co Felix | Stochastically laser-treated film roller |
| DE102006037615A1 (en) * | 2006-08-10 | 2008-02-14 | Felix Böttcher Gmbh & Co. Kg | Rubber rollers with rough surface |
| NL2001113C2 (en) * | 2007-12-21 | 2009-06-23 | Apex Europ B V | Anilox roll for use in printing apparatus, has fluid distribution structure arranged for printing heavy layers of ink and details by combination of restriction formed by change of depth, width, form or wall of channel |
| EP2284007B2 (en) * | 2007-12-21 | 2018-08-22 | Apex Europe B.V. | Method and apparatus for forming an anilox roll |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB721974A (en) * | 1951-09-19 | 1955-01-19 | Paper Patents Co | Improvements in or relating to a dryer for dry-creping paper tissue and a method of making and using the same |
| GB729561A (en) * | 1952-05-19 | 1955-05-11 | Strachan & Henshaw Ltd | Improvements in or relating to inking rolls of rotary printing presses |
| FR93677E (en) * | 1967-05-22 | 1969-05-02 | Etudes De Machines Speciales | Wetting device, in particular for a rotary offset type printing machine. |
| DE2007554B1 (en) * | 1970-02-19 | 1971-08-26 | Maschinenfabrik Augsburg Nürnberg AG, 8900 Augsburg | Alcohol dampening system for offset printing machines |
| CA1011995A (en) * | 1972-08-14 | 1977-06-14 | Dahlgren Manufacturing Company | Liquid applicator for lithographic systems |
| DE2432576B2 (en) * | 1974-07-06 | 1976-04-15 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | DAMP DRIVERS IN DAMPWORKS |
-
1980
- 1980-01-22 CA CA344,204A patent/CA1129247A/en not_active Expired
- 1980-02-06 DE DE19803004295 patent/DE3004295A1/en not_active Withdrawn
- 1980-02-06 NL NL8000747A patent/NL8000747A/en not_active Application Discontinuation
- 1980-02-23 JP JP2216980A patent/JPS55117688A/en active Pending
- 1980-02-25 BE BE0/199534A patent/BE881900A/en not_active IP Right Cessation
- 1980-02-25 FR FR8004031A patent/FR2449484A1/en active Granted
- 1980-02-25 DD DD21924980A patent/DD149186A5/en unknown
- 1980-02-26 GB GB8006432A patent/GB2044398B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE3004295A1 (en) | 1980-09-04 |
| NL8000747A (en) | 1980-08-28 |
| FR2449484A1 (en) | 1980-09-19 |
| FR2449484B1 (en) | 1985-05-24 |
| DD149186A5 (en) | 1981-07-01 |
| GB2044398B (en) | 1983-03-09 |
| JPS55117688A (en) | 1980-09-10 |
| GB2044398A (en) | 1980-10-15 |
| BE881900A (en) | 1980-06-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1129247A (en) | Fluid roller | |
| US4601242A (en) | Copper and ceramic composite ink metering roller | |
| US5988064A (en) | Printing coating head device | |
| CA1048340A (en) | Dampener for lithographic printing plates | |
| EP1930160B1 (en) | Pre-honed doctor blade with a curved profile lamella and method for producing said doctor blade | |
| US4862799A (en) | Copper coated anodized aluminum ink metering roller | |
| JPH0431305B2 (en) | ||
| CA2527807C (en) | Metal-backed printing blanket | |
| US5222434A (en) | Soft rollers for ink and water feeding rollers used in off-set printing presses | |
| US5983797A (en) | End seal engaging bearer of anilox roller assembly | |
| JP3439569B2 (en) | Impression cylinder or intermediate cylinder | |
| JPH0286496A (en) | Method and device for manufacturing ink roller | |
| US4773143A (en) | Liquid supply roller and method of making same | |
| US5221562A (en) | Liquid transfer articles and method for producing them | |
| US4590857A (en) | Ink metering apparatus | |
| JP2703717B2 (en) | Sheet formed as a lining used for the impression cylinder of an offset sheet-fed rotary press for duplex printing | |
| US4538518A (en) | Ink metering apparatus | |
| US4603634A (en) | Copper and nickel layered ink metering roller | |
| CA2005577C (en) | Hydrophobic and oleophilic microporous inking rollers | |
| JPS6331397B2 (en) | ||
| JP3132965B2 (en) | Roller surface antifouling treatment method | |
| US5329850A (en) | Metering roller for a lithographic printing press | |
| EP1466729B1 (en) | Cylinder for a printing machine and process for producing of cylinder | |
| JPH1066912A (en) | Gravure coating applicator and its production | |
| EP0316515B1 (en) | Copper coated anodized aluminum ink metering roller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |