US2729192A - Doctor blade for paper coating apparatus - Google Patents

Doctor blade for paper coating apparatus Download PDF

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Publication number
US2729192A
US2729192A US328840A US32884052A US2729192A US 2729192 A US2729192 A US 2729192A US 328840 A US328840 A US 328840A US 32884052 A US32884052 A US 32884052A US 2729192 A US2729192 A US 2729192A
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US
United States
Prior art keywords
rod
doctor
web
paper
coating
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 - Lifetime
Application number
US328840A
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English (en)
Inventor
Warner Edgar
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.)
Champion Paper and Fibre Co
Original Assignee
Champion Paper and Fibre Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE525629D priority Critical patent/BE525629A/xx
Priority to FR1094628D priority patent/FR1094628A/fr
Application filed by Champion Paper and Fibre Co filed Critical Champion Paper and Fibre Co
Priority to US328840A priority patent/US2729192A/en
Priority to GB33954/53A priority patent/GB759281A/en
Priority to CH318461D priority patent/CH318461A/de
Priority to DEC8690A priority patent/DE1039827B/de
Application granted granted Critical
Publication of US2729192A publication Critical patent/US2729192A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/0005—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating
    • D21H5/006—Controlling or regulating
    • D21H5/0062—Regulating the amount or the distribution, e.g. smoothing, of essentially fluent material already applied to the paper; Recirculating excess coating material applied to paper
    • D21H5/0067—Regulating the amount or the distribution, e.g. smoothing, of essentially fluent material already applied to the paper; Recirculating excess coating material applied to paper with an essentially cylindrical body, e.g. roll or rod

Definitions

  • Patent No. 2,229,621 and it further relates to apparatus for practicing the improved method.
  • the invention has a field of especial utility in the application of coating material comprising pigment and adhesive to one or both surfaces of a moving web of paper during the course of its manufacture on the paper making machine, but it is also useful for applying the same or other types of coating to moving webs either on or ofi? of the paper making machine.
  • the process of the aforesaid patent comprises the application of an excess of fluid coating composition to a paper web, the formation of a layer of filter cake on the surface, and the wiping off of the liquid overlying the filter cake.
  • the patented process has been extensively and increasingly used ever since its introduction and has been found to be highly satisfactory. Some inconveniences have, however, been encountered in connection with its usein cases where the paper machine is functioning imperfectly due to causes completely aside from the coating operation.
  • composition and smoothing the coating remaining on the web by means of a doctor or wiping blade which is flexible and provided with a spring support so that it is adapted to yield where the pressure of the web thereon is too strong and to spring out and maintain properpressure on those parts of the web which would otherwise be slack.
  • the Working edge of this doctor is desirably formed of a small diameter cylindrical rod adapted for rotation in its holder. In many cases I find it is of further advantage to provide a yielding resilient carrier for the web, which supports the web where the spring doctor is pressed thereagainst.
  • the support may be in the form of a rubber covered roll or endless belt and may in many cases advantageously be moistened in order to cause the paper web to adhere 2 V thereto so, that it is placed .under additional tension Where it passes under the spring-pressed doctor, as described in U. S. Patent No. 2,534,321.
  • Fig. 1 is a diagrammatic elevational view partly in section of a coating device employing a flexible spring doctor in accordance with the present invention.
  • Fig. 2 is a similar view, also partly in section showing the modification in which the paper web is backed up ,by a yielding resilient surfaced roll where the coated web is operated on by the spring docto
  • Fig. 3 is a similar view of a modified form of the present invention.
  • Fig. 4 is a fragmentary sectional detail of the rotating doctor and its holder, drawn to a much larger scale.
  • Fig. 5 is a fragmentary view illustrating means for' rotating the doctor rod by power applied at each end thereof.
  • the paper web 11 to be coated passes over a roll 12 which is rotating in either direction at a suitable speed, dipping into liquid coating material 13 contained in a pan or trough 14. An excess of coating material is thereby carried up and deposited on the web.
  • a small diameter cylindrical doctor rod 20 is held in a correspondingly formed holder 22 by spring pressure of a clip 23, as will be more clearly seen in Fig. 4. Both holder and clip are continuous throughout the working length of rod 20 and are arranged to expose an arcuate portion 25 of the cylindrical surface of rod 20, which serves as the working edge of the doctor.
  • Holder 22 and clip 23 together constitute what is, in the appended claims, called a socket which embraces the doctor rod around substantially more than half of its circumference.
  • the rod 26 and holders 22 and 23 are carried by spring mount 24.
  • This may be made of a single sheet of spring metal or a plurality of'strips mounted side by side, as desired. They should not, however, be widely separated since i have found it to be desirable that the springing action be substantially evenly distributed across the full width of the paper web rather than being applied at the ends or at considerable intervals along the length of rod 29.
  • the spring 24 is of such stiffness and is so formed and mounted that changes in fiexure of spring 24, which result from changes in web tension such as occur during operation, cause relatively small percentage changes in the pressure of rod 20 against the paper web.
  • spring 24 be such that the directions ofmovements of rod 20, resultingfrom changes in fiexure of spring 24, form angles of not more than about 45 deg, or at most 60 deg, with the direction of the resultant of the tensile forces on the web as it bends over rod'20.
  • the arrangement illustrated in Fig. 2 may be used. This arrangement differs from that in Fig. l in that the p"per web is held against the doctor rod 20 by a roll 3b which is provided with a yielding resilient covering 31, of rubber or the like. In this case the path of the paper may remain as shown in Fig. l,
  • the supporting spring 24 for doctor rod 20 may advantageously, in this case, be mounted at a different angle, but as before, the direction of movement of rod due to fiexure of spring 24 should make a large angle with the path of the web.
  • the spring metal portion 24 of the mounting is hereinafter, in the appended claims, called a flexible plate-like structure of resilient material.
  • FIG. 3 Another alternative embodiment of the present invention is illustrated in Fig. 3.
  • the doctor rod 20, and its spring mount 24 retain essentially the relationship to the yielding resilient covering 31 on roll 30, and the paper web supported thereby as described in connection with Fig. 2. It differs in its position relative to the vertical so that in this modification the paper is moving downwardly where it passes under the doctor.
  • the coating so supplied forms a pool in advance of the doctor, through which pool one surface of the paper passes before reaching the doctor.
  • screws 42 which may, if desired, be provided at intervals along the length of the doctor mount so that the pressure of rod 20 on roll 30 may be locally adjusted if desired.
  • the roll 37 may in this case be conveniently located beneath the roll 30 and the water shower 45 directed into the nip between these two rolls, as illustrated. Surplus water runs down into pan 46 and is carried away by drain 47. Also shown in this embodiment is a doctor 48 which removes surplus water, coating material which runs out beyond the edges of the paper web, and broken paper which might otherwise tend to wrap around the roll.
  • the angle between the doctor blade and the surface of roll 30 is advantageously of the order of magnitude of 45 deg. since if it is much less than this it does not leave room for free circulation and flowback of the liquid coating material doctored ofl? of the web, and if it is much larger than this, the pressure exerted by the roll on the blade is directed too nearly directly towards the support so that the flexure of the spring to compensate a given difference in level of the paper support surface becomes excessive.
  • the doctor rod 20 has been stated to be adapted to rotate in its holder. While it may be turned manually or mechanically through a part of a revolution at definite or indefinite intervals in order to distribute the wear and prolong its life, it is preferably rotated continuously at slow speed to distribute the wear more uniformly and to carry away lumps of coating or foreign matter which might lodge on a stationary doctor and cause scratches in the surface of the coated web.
  • the speed of rotation is desirably slow and need be only enough to keep the rod in continuous motion. A surface speed of about ft. per minute has been found satisfactory. This rotation is effective for the desired purpose regardless of direction, but it is generally preferred to rotate the rod counter to the direction of movement of the paper thereover.
  • the diameter of the rod 20 should be determined with reference to a number of factors. In the first place, the smaller the diameter of the rod 20, the greater its flexibility and the greater its ability to follow variations in web tension and conform to irregularities in the backing roll surface, in response to the springing action provided in accordance with the present invention. It should also be recognized that doctors with cylindrical working surfaces tend to draw the coating material into parallel ridges where it parts from the doctor surface. These ridges are finer and less noticeable the smaller the diameter of the cylindrical working surface of the doctor. These ridges are unimportant in the case of coatings which will flow out after being applied.
  • rods much less than about /3 inch in diameter are difficult to enclose and yet leave sufiicient working surface exposed.
  • small rods, especially when the working length is considerable, do not have adequate stiffness or strength to resist the torsional stresses involved in use since, if the rod holders 22, 23 are sufiiciently close-fitting to prevent coating material from being carried around the rod 20 as it rotates, they impose a certain frictional resistance to rotation of the rod.
  • the diameter of the rod is too small relative to its length, irregularities in the coated surface of the paper are found to be formed due, it is thought, to excessive torsional vibrations in the rod. These, I find, can be reduced and smaller rods used for any given length (i. e.
  • doctor rods should not corrode readily in contact with the coatings used and they should be hard enough to wear for a satisfactory length of time before requiring replacement.
  • aqueous, mineral pigment coatings such as those used in the manufacture of printing paper
  • the spring mount 24 should be stiff enough to provide pressures of up to about 5 to 10 pounds per linear inch of rod 20 with reasonable deflection, but should be flexible enough to adjust itself to compensate for the maximum expected variation in web length, or surface level of the backing roll, without significant change in the pressure which it exerts on the web.
  • the cover 31 on backing roll 30 was about inch thick and had a Pusey and Jones density of about 85.
  • Doctor rod 20 was of polished tool steel inch in diameter plated with hard chromium to a thickness of about 0.002 inch on the radius.
  • the spring mount 24 was of 0.035 inch thick spring steel and projected approximately 2 /2 inches from its support. It was pressed against the surface of the backing roll with a pressure of 6 to 7 pounds per linear inch and was rotated continuously in a direction counter to the direction of movement of the paper web, at a speed of about 10 revolutions per minute, by means of a geared motor reducer on each end.
  • the roll 30 was about 174 inches in length while the length of the doctor rod holders 22 and 23 and spring mount 24 were slightly longer, and the working length of rod 20 was slightly less.
  • the rod projected beyond the ends of the holders 22, 23, and was connected by flexible connectors to the driving means.
  • the coating was an aqueous composition composed primarily of calcium carbonate, coating clay, and casein adhesive dispersed in water and containing about 47 per cent total solids.
  • the paper web was about 156 inches in width and was composed primarily of sized bleached sulfate pulp, and passed directly from the first dryer section of the paper making machine, at a speed of about eight hundred feet per minute, over roll 30 of the coating device which applied the coating to the wire side of the web. From the coater the web passed over another section of dryers and through another coating device of the same kind which applied a second coat to the same side of the web. The web then passed over further dryers until the drying was completed. The coated paper was then calendered. The resulting product had a coated weight of about 60 pounds per ream 500 sheets 25 x 38 inches) while the coating weight was about pounds per ream. It was a high quality of coated-one-side paper with a highly uniform coated surface, free from visible ridges and blemishes, and suitable for receiving high grade printing.
  • the flexible blade with the working edge formed by a rotating rod has been found to compensate for the normally encountered variations in length of a paper web when operating on an unbacked web as illustrated in Fig. 1.
  • a web backed by a rubber covered roll as illustrated in Figs. 2 and 3 it has been found to compensate for dents in the roll surface such as are sometimes caused when crumpled scraps of a broken paper web pass between rolls under pressure, or flats formed when a rubber covered roll is carelessly allowed to stand resting on its surface rather than fully supported on its journal-bearings.
  • the present improvement not only compensates for irregularities in length of a paper web, but also completely prevents carrying through of excessive amounts of wet coating on loose ends of a paper web, and completely prevents the former troublesome fouling of the dryers.
  • the apparatus illustrated in Fig. 3 can be used by eliminating the water shower 40 and passing the paper web from left to right between rolls 30 and 37, instead of passing it around roll 30 and under doctor rod as shown.
  • the doctor then spreads a uniform film over the surface of the rubber cover 31 on roll 30 and this film of coating is then transferred to the surface of the paper web by the pressure in the nip between rolls 30 and37. Because of the impervious surface of the rubber cover 31, no filter cake is formed on its surface and the film of coating left on it by the doctor is consequently thinner than that left by the same doctor on the surface of the paper web.
  • doctoring means for smoothing and limiting the thickness of the coating
  • doctoring means comprises: a flexible cylindrical doctor rod; a flexible socket in which said rod is rotatably mounted, which socket embraces said rod around more than half of its circumference and is continuous throughout the working length of the rod; a spring mounting of uniform stiffness throughout the entire working length of said doctor rod, said mounting comprising a flexible plate-like structure of resilient material, to one edge of which plate-like structure said flexible socket is fixedly attached throughout its length; and a rigid support on which the other edge of said plate-like structure is fixedly mounted throughout its length, whereby the position of the doctor rod and the corresponding degree of flexure of said plate-like structure, at any time, depend upon the degree of pressure against said doctor rod at that time.
  • a device as defined in claim 1 wherein the path of the paper web is changed materially in direction at the doctor rod, by contact therewith, whereby the position of the doctor rod is determined by the equilibrium of the forces of tension in the paper web and the forces of resilience in the rod and its flexible socket and platelike mounting structure.
  • a device as defined in claim 1 wherein the platelike structure is fixed to its support in such proximity and angular relationship to the surface on which the coating is being doctored, and possesses such degree of flexibility that, when the doctor is in operating position against the surface on which the coating is being doctored, the platelike structure is flexed to a degree which provides doctoring pressure between said rod and said surface and, during normal operation, maintains the doctor rod in operative position against said surface with only small percentage changes in the degree of fiexure and in the resulting pressure between said rod and said surface.
  • doctor rod is between one-eighth and three-eighths inch in diameter and is pressed against the roll with a pressure of between five and ten pounds per linear inch.

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  • Paper (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Coating Apparatus (AREA)
US328840A 1952-12-31 1952-12-31 Doctor blade for paper coating apparatus Expired - Lifetime US2729192A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE525629D BE525629A (US06566495-20030520-M00011.png) 1952-12-31
FR1094628D FR1094628A (US06566495-20030520-M00011.png) 1952-12-31
US328840A US2729192A (en) 1952-12-31 1952-12-31 Doctor blade for paper coating apparatus
GB33954/53A GB759281A (en) 1952-12-31 1953-12-07 Improvements in paper coating apparatus
CH318461D CH318461A (fr) 1952-12-31 1953-12-23 Procédé de fabrication de papier couché et appareil pour l'exécution de ce procédé
DEC8690A DE1039827B (de) 1952-12-31 1953-12-31 Rakel zur Herstellung von Streichpapier od. dgl.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US328840A US2729192A (en) 1952-12-31 1952-12-31 Doctor blade for paper coating apparatus

Publications (1)

Publication Number Publication Date
US2729192A true US2729192A (en) 1956-01-03

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US328840A Expired - Lifetime US2729192A (en) 1952-12-31 1952-12-31 Doctor blade for paper coating apparatus

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US (1) US2729192A (US06566495-20030520-M00011.png)
BE (1) BE525629A (US06566495-20030520-M00011.png)
CH (1) CH318461A (US06566495-20030520-M00011.png)
DE (1) DE1039827B (US06566495-20030520-M00011.png)
FR (1) FR1094628A (US06566495-20030520-M00011.png)
GB (1) GB759281A (US06566495-20030520-M00011.png)

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2830555A (en) * 1954-10-29 1958-04-15 Minnesota & Ontario Paper Co Roller apparatus for coating paper
US2842092A (en) * 1955-03-02 1958-07-08 John Waldron Corp Reverse roll coating machine with blade support for web
US2946307A (en) * 1955-12-23 1960-07-26 Champion Paper & Fibre Co Apparatus for coating paper
US2970564A (en) * 1955-12-23 1961-02-07 Champion Paper & Fibre Co Apparatus for coating paper
US3084663A (en) * 1960-08-29 1963-04-09 Champion Papers Inc Doctor blade for coating apparatus
US3132048A (en) * 1961-04-07 1964-05-05 Higginson Norman Wall paper pasting and paper hanging apparatus
US3143438A (en) * 1960-07-26 1964-08-04 West Virginia Pulp & Paper Co Apparatus for coating web material
US3179083A (en) * 1960-09-19 1965-04-20 Champion Papers Inc Doctor blade
US3187716A (en) * 1962-09-19 1965-06-08 Rice Barton Corp Coating machinery
US3245377A (en) * 1962-06-20 1966-04-12 Kimberly Clark Co Apparatus for coating paper
US3559572A (en) * 1969-05-14 1971-02-02 Us Plywood Champ Papers Inc Method of inking a printing roll using a metering roll and revolving doctor rod
US3683851A (en) * 1970-02-21 1972-08-15 Jagenberg Werke Ag Apparatus for regulating the thickness of a coating on sheet material
US4166689A (en) * 1976-07-23 1979-09-04 Agfa-Gevaert, A.G. Apparatus for wet treatment of carriers of photosensitive material
US4192712A (en) * 1977-12-13 1980-03-11 Beloit Corporation Combined breaker size press coater
US4290362A (en) * 1978-12-23 1981-09-22 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Inking system for a printing machine, particularly of the offset or gravure type
US4355576A (en) * 1973-08-28 1982-10-26 Texogesa S.A. Process of offset printing on sheet material with high viscosity greasy ink
US4400953A (en) * 1979-09-01 1983-08-30 Eduard Kusters Apparatus for the continuous treatment of textile and similar webs of material
US4408527A (en) * 1981-05-26 1983-10-11 Bell Clinton C Flexographic ink distribution system
US4527471A (en) * 1983-05-06 1985-07-09 Dahlgren Harold P Dampening fluid removal device
US4757782A (en) * 1985-08-07 1988-07-19 Valmet Oy Apparatus for coating a web
US4808445A (en) * 1987-08-26 1989-02-28 Beloit Corporation Coating apparatus and method
US4848268A (en) * 1984-05-11 1989-07-18 J. M. Voith Gmbh Apparatus and method for applying a liquid to a moving web
US5048453A (en) * 1988-09-27 1991-09-17 Btg Kalle Inventing Ab Coating device
DE4038874A1 (de) * 1990-12-06 1992-06-11 Kuesters Eduard Maschf Vorrichtung zur aufbringung einer behandlungsfluessigkeit auf eine laufende, insbesondere textile warenbahn
US5228920A (en) * 1991-06-03 1993-07-20 Thompson Iii Ernest E Film coating unit
DE4302437A1 (en) * 1993-01-29 1993-08-12 Voith Gmbh J M Paper web coating for low strength recycled paper material - by applying part of coating vol. at station with drying between stations, for strengthening
US5264247A (en) * 1990-09-14 1993-11-23 Valmet Paper Machinery Inc. Process for the manufacture of a coating bar for a bar coater
US5328511A (en) * 1991-09-19 1994-07-12 J. M. Voith Gmbh Coating device having two separate collection troughs connected to each other
DE4402744A1 (de) * 1994-01-31 1995-08-03 Voith Gmbh J M Vorrichtung zum Auftragen von Streichfarbe auf eine Faserstoffbahn
US5496406A (en) * 1993-08-07 1996-03-05 J. M. Voith Gmbh Coating device having infrared and suspension drying sections
US5595601A (en) * 1990-09-14 1997-01-21 Valmet Corporation Coating bar for a bar coater
US5922128A (en) * 1989-07-25 1999-07-13 J.M. Voith Gmbh Applicator device for coating running webs
US6093248A (en) * 1996-02-21 2000-07-25 Voith Sulzer Papiermaschinen Gmbh Apparatus for applying a liquid or pasty medium onto a traveling material web
US6110281A (en) * 1992-10-15 2000-08-29 Dial-In Equipment Company Preconditioning means for non-woven rolls
US20030049379A1 (en) * 2001-08-17 2003-03-13 Fuji Photo Film Co., Ltd. Coating method and coating apparatus
US20040144305A1 (en) * 2003-01-17 2004-07-29 Fuji Photo Film Co., Ltd. Coating apparatus and coating method
EP1614483A2 (de) * 2004-07-05 2006-01-11 Jakob Weiss & Sohne Maschinenfabrik Gmbh Rakelvorrichtung und Rakelverfahren
US20150239264A1 (en) * 2014-02-25 2015-08-27 Seiko Epson Corporation Liquid discharge device and media pretreatment method

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
US3000760A (en) * 1957-06-28 1961-09-19 Eastman Kodak Co Method and apparatus for coating a surface
US3182632A (en) * 1962-02-05 1965-05-11 Riegel Paper Corp Coating apparatus with improved doctor means
DE10316337A1 (de) * 2003-04-10 2004-10-28 Eduard Küsters Maschinenfabrik GmbH & Co. KG Auftragswerk zur Applikation von Flotte auf eine laufende Bahn
DE102012001956A1 (de) * 2012-02-02 2013-08-08 Olbrich Gmbh Beschichtungssystem für flexible Bahnen

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US1968911A (en) * 1931-02-07 1934-08-07 Potdevin Machine Co Waxing machine
US2136739A (en) * 1937-06-24 1938-11-15 Canada Paper Company Apparatus for making laminated wrapping papers
US2334102A (en) * 1940-08-26 1943-11-09 Dow Chemical Co Coating equipment
US2368176A (en) * 1940-09-20 1945-01-30 Trist Arthur Ronald Machine for the coating of webs of paper and like absorbent material
US2534321A (en) * 1946-05-16 1950-12-19 Champion Paper & Fibre Co Coating method and apparatus
US2598733A (en) * 1949-03-16 1952-06-03 Champion Paper & Fibre Co Wiping blade for coating devices

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US2237068A (en) * 1938-08-27 1941-04-01 Champion Paper & Fibre Co Method for making coated paper
US2534320A (en) * 1946-05-16 1950-12-19 Champion Paper & Fibre Co Apparatus for coating paper
DE841544C (de) * 1950-12-03 1952-06-16 J W Zanders Feinpapierfabrik G Schabemesser zum Abstreifen des UEberschusses an Streichfluessigkeit von Papier- oder Gewebebahnen

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Publication number Priority date Publication date Assignee Title
US1968911A (en) * 1931-02-07 1934-08-07 Potdevin Machine Co Waxing machine
US2136739A (en) * 1937-06-24 1938-11-15 Canada Paper Company Apparatus for making laminated wrapping papers
US2334102A (en) * 1940-08-26 1943-11-09 Dow Chemical Co Coating equipment
US2368176A (en) * 1940-09-20 1945-01-30 Trist Arthur Ronald Machine for the coating of webs of paper and like absorbent material
US2534321A (en) * 1946-05-16 1950-12-19 Champion Paper & Fibre Co Coating method and apparatus
US2598733A (en) * 1949-03-16 1952-06-03 Champion Paper & Fibre Co Wiping blade for coating devices

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2830555A (en) * 1954-10-29 1958-04-15 Minnesota & Ontario Paper Co Roller apparatus for coating paper
US2842092A (en) * 1955-03-02 1958-07-08 John Waldron Corp Reverse roll coating machine with blade support for web
US2946307A (en) * 1955-12-23 1960-07-26 Champion Paper & Fibre Co Apparatus for coating paper
US2970564A (en) * 1955-12-23 1961-02-07 Champion Paper & Fibre Co Apparatus for coating paper
US3143438A (en) * 1960-07-26 1964-08-04 West Virginia Pulp & Paper Co Apparatus for coating web material
US3084663A (en) * 1960-08-29 1963-04-09 Champion Papers Inc Doctor blade for coating apparatus
US3179083A (en) * 1960-09-19 1965-04-20 Champion Papers Inc Doctor blade
US3132048A (en) * 1961-04-07 1964-05-05 Higginson Norman Wall paper pasting and paper hanging apparatus
US3245377A (en) * 1962-06-20 1966-04-12 Kimberly Clark Co Apparatus for coating paper
US3187716A (en) * 1962-09-19 1965-06-08 Rice Barton Corp Coating machinery
US3559572A (en) * 1969-05-14 1971-02-02 Us Plywood Champ Papers Inc Method of inking a printing roll using a metering roll and revolving doctor rod
US3683851A (en) * 1970-02-21 1972-08-15 Jagenberg Werke Ag Apparatus for regulating the thickness of a coating on sheet material
US4355576A (en) * 1973-08-28 1982-10-26 Texogesa S.A. Process of offset printing on sheet material with high viscosity greasy ink
US4358996A (en) * 1973-08-28 1982-11-16 Texogesa, S.A. Rotary offset printing press
US4166689A (en) * 1976-07-23 1979-09-04 Agfa-Gevaert, A.G. Apparatus for wet treatment of carriers of photosensitive material
US4192712A (en) * 1977-12-13 1980-03-11 Beloit Corporation Combined breaker size press coater
US4290362A (en) * 1978-12-23 1981-09-22 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Inking system for a printing machine, particularly of the offset or gravure type
US4400953A (en) * 1979-09-01 1983-08-30 Eduard Kusters Apparatus for the continuous treatment of textile and similar webs of material
US4408527A (en) * 1981-05-26 1983-10-11 Bell Clinton C Flexographic ink distribution system
US4527471A (en) * 1983-05-06 1985-07-09 Dahlgren Harold P Dampening fluid removal device
US4848268A (en) * 1984-05-11 1989-07-18 J. M. Voith Gmbh Apparatus and method for applying a liquid to a moving web
US4757782A (en) * 1985-08-07 1988-07-19 Valmet Oy Apparatus for coating a web
US4808445A (en) * 1987-08-26 1989-02-28 Beloit Corporation Coating apparatus and method
US5048453A (en) * 1988-09-27 1991-09-17 Btg Kalle Inventing Ab Coating device
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CH318461A (fr) 1957-01-15
DE1039827B (de) 1958-09-25
GB759281A (en) 1956-10-17
FR1094628A (US06566495-20030520-M00011.png) 1955-05-23

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