US3146159A - Method of coating paper with high solids high viscosity coating in the wet end of the paper making machine - Google Patents

Method of coating paper with high solids high viscosity coating in the wet end of the paper making machine Download PDF

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Publication number
US3146159A
US3146159A US46780A US4678060A US3146159A US 3146159 A US3146159 A US 3146159A US 46780 A US46780 A US 46780A US 4678060 A US4678060 A US 4678060A US 3146159 A US3146159 A US 3146159A
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US
United States
Prior art keywords
coating
roll
web
press
paper
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
US46780A
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English (en)
Inventor
Gerald D Muggleton
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.)
Combined Locks Paper Co
Original Assignee
Combined Locks Paper 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 NL121598D priority Critical patent/NL121598C/xx
Priority to NL267762D priority patent/NL267762A/xx
Application filed by Combined Locks Paper Co filed Critical Combined Locks Paper Co
Priority to US46780A priority patent/US3146159A/en
Priority to GB5624/61A priority patent/GB976195A/en
Priority to DEC23631A priority patent/DE1227773B/de
Priority to BE605592A priority patent/BE605592A/fr
Priority to CH894461A priority patent/CH394791A/de
Priority to FR873915A priority patent/FR1313786A/fr
Application granted granted Critical
Publication of US3146159A publication Critical patent/US3146159A/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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/24—Addition to the formed paper during paper manufacture
    • D21H23/26—Addition to the formed paper during paper manufacture by selecting point of addition or moisture content of the paper
    • D21H23/28—Addition before the dryer section, e.g. at the wet end or press section

Definitions

  • coating refers broadly to a suspension of: starch, casein or other adhesives; cla, pigment or minerals; and additives (generally the adhesives range from 15% to 20% and the minerals from 85% to 80% of the total solids dry); with respect to the coating high solids content means such content in the range of 40% to 60% or in excess of 50%; high viscosity means a viscosity of from 3,000 to 10,000 centipoises, or over 5,000 centipoises; heavy coating means coating having high solids content and high viscosity; wet end coating means coating which is applied to the web as the web passes through the press rolls in the press section of the paper making machine (such presses usually identified as the first, second, third (or reverse press), and fourth (or smoother where the web is unsupported by a felt); and speed means lineal travel of the web and peripheral travel of a roll in feet per minute (f.p.m.).
  • Such other advantages are: (1) increase in the speed of an existing machine by increase of dryer capacity; (2) elimination of extra wetting, shrinking and drying occasioned by the applying of the coating at the dry end; (3) eliminating the tendency of the coating to yield to surface tension and be unequally distributed upon the coating roll surface; (4) doing away with undesirable pattern due to splitting; (5) minimizing film distortion as the coating is pressed against the rough surface of the web; (6) proper leveling out of the web due to increase in lubrication of the surface of the web; (7) obtaining even distribution; (8) preventing damaging contact between soft fibres of the web and the surface of the press roll; and (9) the application of substantial quantities of coating to lighter weight papers so as to be comparable with fully coated sheets.
  • This object is obtained by applying heavy coating to the web in the wet end of the paper making machine in the high solids content and high viscosity ranges set forth above.
  • the viscosities are within such range (as compared to viscosity range of centipoises obtainable by using the method described in Patent No. 2,772,604) the difliculty of keeping out commercially non-acceptable pattern is eliminated and the other advantages enumerated above are obtained.
  • high solids content high viscosities in the coating and greater 50% moisture content in the web there is a squashing out and dispersion over wide areas in the fibrous web and an elimination of the tendency of the coating to yield to surface tension and partly remain on the press or coating roll thus entirely eliminating splitting pattern.
  • the speed of the applicator roll and the press roll is the same; i.e., the speed differential is practically nil.
  • the speed differential is practically nil.
  • the speed differential may be further adjusted to various differentials greater than the optimum to meter the desired quantity of coating to be applied to the press roll surface.
  • FIG. 1 is a diagrammatic view in side elevation of the wet end of a Fourdrinier paper making machine showing the press rolls and applicator roll by which the method embodying this invention is carried out;
  • FIG. 2 is an enlarged fragmentary diagrammatic view in side elevation of the first press of said machine
  • FIG. 3 is an enlarged diagrammatic view in perspective of the first press of said machine.
  • the web is formed in the usual manner on the wire 12 of the paper making machine.
  • the web Upon leaving the couch roll 14 the web is picked up by the felt 16 of the first press 18.
  • the web After passing through the press 18, the web is picked up by the felt 20 of the second press 22.
  • the web 10 being stronger may be carried over the tops of applicator rolls and again deposited on the felt 20.
  • the web is transferred to the felt 24 of the third or reversing press 26.
  • the web leaves the couch roll 14 and is received by the first press rolls 18, it has a water content of from 80% to 86% and a solids content of 14% to 20%, such solids content may be free of clay or other ash forming content.
  • the web is able to take from the upper roll of the first press 18 a film or heavy coating which has a solids content in the range of 40% to 60% or in excess of 50% and a viscosity in the range of from 3,000 to 10,000 centipoises or over 5,000 centipoises.
  • the web takes up such heavy coating from the coating roll 18 without a splitting pattern. Because of reduction in surface tension forces in such heavy coating, unequal distribution of the coating on such roll is eliminated.
  • This high viscosity coating thoroughly lubricates the surface of the web permitting more leveling out of the fibres of the web and doing away with film distortion arising from pressing the coating on the rough paper surface.
  • the particles of mineral and pigments in such heavy coating interpose between the web and the surface of the press roll 18 and tend to reduce the intimate contact between the soft fibres of the web and the surface of such press roll thereby protecting the web against partial crushing.
  • a single smooth small diameter applicator roll 28 is mounted as shown adjacent the press roll 18 in bearings of customary design.
  • Standard type actuating air cylinders (not shown) control the position of the roll 28 with respect to the press roll 18 so that in normal operation these rolls run in close contact under very little pressure.
  • the actuating air cylinders can vary this pressure as required and remove the roll 28 out of contact when coating is not to be applied.
  • the applicator roll 28 is individually driven by a controlled electric motor diagrammatically illustrated at 29 so that the peripheral speed of such roller may be varied with respect to the peripheral speed of the press roll 18 as hereinafter set forth in detail.
  • the heavy coating material is supplied to the nip between the rolls 28 and 18 to form a supply pool 30 from a distributing manifold indicated generally at 32.
  • Adjustable basins or catch boxes 34 of well known design placed at the ends of the rolls 28 and 18 control the height of the supply pool 30 and catch the overflow of the pool for reuse as is normal practice in this art.
  • any heavy coating is supplied to the nip between rolls 18 and 28 and before the roll 28 is brought into contact with the roll 18, its speed is controlled through motor 29 to have substantially the same speed in the same direction of peripheral travel at the nip as the roller 18.
  • the roll 28 is moved into light pressure contact with the roll 18.
  • the heavy coating may be supplied from the manifold 32 to the nip to form and continually maintain the pool 30. If such pool should become dry and at such time the roll 28 is not being rotated at the same speed as the roll 18, the roll 28 must be withdrawn from contact with roll 18 in order to prevent destruction to the surface of the rolls while in the dry state.
  • the speed of the roller 28 may be lessened with respect to the speed of the roll 18 until all turbulence, splashing and disturbance of the coating in the pool is eliminated and the pool is calm.
  • the differential speed between these two rollers may be further adjustably increased to meter the amount of the coating which is applied to the press or coating roll 18. It his been found that with the press roll 18 running at speeds of 785 to 790 f.p.m. the speed of the applicator roll for normal application will range from 150 to 250 f.p.m. When the viscosity of the heavy coating is increased the speed of the applicator roll 28 may need to be adjusted to maintain the pool 30 in a reasonably calm non-splashing condition.
  • an advantage of applying a high solids content and high viscosity coating in the wet end of the paper making machine is that existing machines can be easily converted to employ this method and at the same time increase their capacity for making paper.
  • the speed at which the web runs through many of such machines is usually limited by the capacity of the drying section.
  • the moisture content of the web as it enters the dryer is automatically lowered because the solids content of the coating is in excess of the solids content of the web at the wet end. Since the moisture content of the Web is now lower as the web enters the dryers less moisture need be evaporated and the machine speed can be increased.
  • the heavy coating may be added at the second press 22 by an applicator roll 28:! or at a smoother press (not shown) where the web is not supported by a felt.
  • the heavy coating material may also be applied to both sides of the web. This can be done by applicator rolls contacting both the upper and lower press rolls of the smoother press or by applicator rolls 36 in the second press 22 or applicator rolls 38 and 40 in the reverse press 26.
  • the method of applying heavy coating to a web of paper travelling through the wet end of a paper making machine having press rolls comprising, placing an adjustable speed controlled small diameter applicator roll in contact with one press roll to form a nip, continually furnishing to said nip a supply of heavy coating having a viscosity in the range of 3,000 to 10,000 centipoises, and driving said applicator roll in the same peripheral direction at the nip as said press roll and at a speed sufiiciently less than the speed of said press roll to maintain a calm non-splashing pond of coating at said nip.

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US46780A 1960-08-01 1960-08-01 Method of coating paper with high solids high viscosity coating in the wet end of the paper making machine Expired - Lifetime US3146159A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
NL121598D NL121598C (enrdf_load_stackoverflow) 1960-08-01
NL267762D NL267762A (enrdf_load_stackoverflow) 1960-08-01
US46780A US3146159A (en) 1960-08-01 1960-08-01 Method of coating paper with high solids high viscosity coating in the wet end of the paper making machine
GB5624/61A GB976195A (en) 1960-08-01 1961-02-15 Method of coating paper in a paper-making machine
DEC23631A DE1227773B (de) 1960-08-01 1961-03-13 Verfahren zum Maschinenstreichen von Papier
BE605592A BE605592A (fr) 1960-08-01 1961-06-30 Procédé et dispositif pour enduire le papier d'un enduit à haute teneur en solides et à viscosité élevée dans l'extrémité mouillée de la machine de fabrication de papier
CH894461A CH394791A (de) 1960-08-01 1961-08-01 Verfahren zum Überziehen von Papier mit einer Streichmasse hoher Viskosität mit hohem Gehalt an festen Stoffen am feuchten Ende der Papier-Herstellungsmaschine
FR873915A FR1313786A (fr) 1960-08-01 1961-09-22 Perfectionnements aux procédés et aux moyens d'application d'enduits de couchage sur les papiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US46780A US3146159A (en) 1960-08-01 1960-08-01 Method of coating paper with high solids high viscosity coating in the wet end of the paper making machine

Publications (1)

Publication Number Publication Date
US3146159A true US3146159A (en) 1964-08-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
US46780A Expired - Lifetime US3146159A (en) 1960-08-01 1960-08-01 Method of coating paper with high solids high viscosity coating in the wet end of the paper making machine

Country Status (6)

Country Link
US (1) US3146159A (enrdf_load_stackoverflow)
BE (1) BE605592A (enrdf_load_stackoverflow)
CH (1) CH394791A (enrdf_load_stackoverflow)
DE (1) DE1227773B (enrdf_load_stackoverflow)
GB (1) GB976195A (enrdf_load_stackoverflow)
NL (2) NL267762A (enrdf_load_stackoverflow)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3231418A (en) * 1964-05-05 1966-01-25 Combined Locks Paper Co Coating a moving paper web with a coating roller having lower peripheral speed than web
US4108110A (en) * 1977-03-17 1978-08-22 Beloit Corporation Apparatus for coating both sides of a travelling web
US4177304A (en) * 1977-03-17 1979-12-04 Beloit Corporation Method of coating both sides of a travelling web
US4237816A (en) * 1978-10-31 1980-12-09 Duskin Franchise Co., Ltd. Oil coater for mat
US4452172A (en) * 1979-12-11 1984-06-05 Molins Limited Gummer for cigarette filter attachment machines
US4724170A (en) * 1986-09-02 1988-02-09 The Goodyear Tire & Rubber Company Apparatus and method for applying cement to an end portion of a flexible strip
US4793899A (en) * 1987-07-23 1988-12-27 Beloit Corporation Coating press apparatus using short dwell coaters
US5750186A (en) * 1993-03-11 1998-05-12 Frazzitta; Joseph Method of coating a surface
EP0881329A2 (en) * 1997-05-30 1998-12-02 Mitsubishi Heavy Industries, Ltd. Method and apparatus for adding minute fibers etc. at press section of a paper machine
WO1999022067A1 (de) * 1997-10-24 1999-05-06 Voith Sulzer Papiertechnik Patent Gmbh Verfahren und vorrichtung zum auftragen eines mediums auf eine laufende materialbahn
US6074528A (en) * 1995-09-29 2000-06-13 Mohawk Paper Mills, Inc. Text and cover printing paper and process for making the same
DE10358413A1 (de) * 2003-12-13 2005-07-14 Voith Paper Patent Gmbh Verfahren zum Behandeln einer Bahn aus Papier oder Karton
WO2006010747A1 (de) * 2004-07-27 2006-02-02 Voith Patent Gmbh Verfahren und vorrichtung zum aufbringen eines auftragsmediums in einer maschine zur herstellung einer faserstoffbahn
US20060174904A1 (en) * 2005-02-07 2006-08-10 Schweitzer-Mauduit International, Inc. Smoking articles having reduced analyte levels and process for making same
US20140262096A1 (en) * 2011-10-27 2014-09-18 Giorgio Trani Method for modifying the physical and/or chemical characteristics of a fibrous band and apparatus for carrying out the method

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1933963A (en) * 1931-12-18 1933-11-07 Champion Coated Paper Company Process for coating paper
US2205557A (en) * 1937-10-07 1940-06-25 Gardner Richardson Co Waterproof and greaseproof paper
US2216143A (en) * 1936-05-11 1940-10-01 Cons Water Power & Paper Co Process of coating paper
US2398844A (en) * 1944-03-04 1946-04-23 Combined Locks Paper Co Paper coating
US2676563A (en) * 1949-02-05 1954-04-27 Champion Paper & Fibre Co Apparatus for coating paper
US2772184A (en) * 1953-09-21 1956-11-27 Kimberly Clark Co Paper coating
US2772604A (en) * 1953-06-03 1956-12-04 Combined Locks Paper Co Method of coating paper with high solids content coating material
US2870738A (en) * 1957-02-28 1959-01-27 Black Clawson Co Paper coating machine
US2888902A (en) * 1955-11-15 1959-06-02 Bowater Res & Dev Co Ltd Apparatus for coating paper

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2398843A (en) * 1942-07-11 1946-04-23 Combined Locks Paper Co Apparatus for coating paper

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1933963A (en) * 1931-12-18 1933-11-07 Champion Coated Paper Company Process for coating paper
US2216143A (en) * 1936-05-11 1940-10-01 Cons Water Power & Paper Co Process of coating paper
US2205557A (en) * 1937-10-07 1940-06-25 Gardner Richardson Co Waterproof and greaseproof paper
US2398844A (en) * 1944-03-04 1946-04-23 Combined Locks Paper Co Paper coating
US2676563A (en) * 1949-02-05 1954-04-27 Champion Paper & Fibre Co Apparatus for coating paper
US2772604A (en) * 1953-06-03 1956-12-04 Combined Locks Paper Co Method of coating paper with high solids content coating material
US2772184A (en) * 1953-09-21 1956-11-27 Kimberly Clark Co Paper coating
US2888902A (en) * 1955-11-15 1959-06-02 Bowater Res & Dev Co Ltd Apparatus for coating paper
US2870738A (en) * 1957-02-28 1959-01-27 Black Clawson Co Paper coating machine

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3231418A (en) * 1964-05-05 1966-01-25 Combined Locks Paper Co Coating a moving paper web with a coating roller having lower peripheral speed than web
US4108110A (en) * 1977-03-17 1978-08-22 Beloit Corporation Apparatus for coating both sides of a travelling web
US4177304A (en) * 1977-03-17 1979-12-04 Beloit Corporation Method of coating both sides of a travelling web
US4237816A (en) * 1978-10-31 1980-12-09 Duskin Franchise Co., Ltd. Oil coater for mat
US4452172A (en) * 1979-12-11 1984-06-05 Molins Limited Gummer for cigarette filter attachment machines
US4724170A (en) * 1986-09-02 1988-02-09 The Goodyear Tire & Rubber Company Apparatus and method for applying cement to an end portion of a flexible strip
US4793899A (en) * 1987-07-23 1988-12-27 Beloit Corporation Coating press apparatus using short dwell coaters
US6036993A (en) * 1993-03-11 2000-03-14 Frazzitta; Joseph Method of coating a surface
US5750186A (en) * 1993-03-11 1998-05-12 Frazzitta; Joseph Method of coating a surface
US6077392A (en) * 1995-09-29 2000-06-20 Mohawk Paper Mills, Inc. Text and cover printing paper and process for making the same
US6074528A (en) * 1995-09-29 2000-06-13 Mohawk Paper Mills, Inc. Text and cover printing paper and process for making the same
US6387213B1 (en) 1995-09-29 2002-05-14 Mohawk Paper Mills, Inc. Text and cover printing paper and process for making the same
EP0881329A2 (en) * 1997-05-30 1998-12-02 Mitsubishi Heavy Industries, Ltd. Method and apparatus for adding minute fibers etc. at press section of a paper machine
US6383337B1 (en) 1997-10-24 2002-05-07 Voith Sulzer Papiertechnik Patent Gmbh Method and device for applying a medium on a running web of material
WO1999022067A1 (de) * 1997-10-24 1999-05-06 Voith Sulzer Papiertechnik Patent Gmbh Verfahren und vorrichtung zum auftragen eines mediums auf eine laufende materialbahn
DE10358413B4 (de) * 2003-12-13 2006-10-12 Voith Paper Patent Gmbh Verfahren zum Behandeln einer Bahn aus Papier oder Karton
DE10358413A1 (de) * 2003-12-13 2005-07-14 Voith Paper Patent Gmbh Verfahren zum Behandeln einer Bahn aus Papier oder Karton
WO2006010747A1 (de) * 2004-07-27 2006-02-02 Voith Patent Gmbh Verfahren und vorrichtung zum aufbringen eines auftragsmediums in einer maschine zur herstellung einer faserstoffbahn
US20080314544A1 (en) * 2004-07-27 2008-12-25 Wilhelm Gansberger Method and Device for Applying a Coating Medium in a Machine Used for Producing a Fiber Web
US20060174904A1 (en) * 2005-02-07 2006-08-10 Schweitzer-Mauduit International, Inc. Smoking articles having reduced analyte levels and process for making same
US20110000497A1 (en) * 2005-02-07 2011-01-06 Schweitzer-Mauduit International, Inc. Smoking Articles Having Reduced Analyte Levels and Process For Making Same
US8151806B2 (en) 2005-02-07 2012-04-10 Schweitzer-Mauduit International, Inc. Smoking articles having reduced analyte levels and process for making same
US20140262096A1 (en) * 2011-10-27 2014-09-18 Giorgio Trani Method for modifying the physical and/or chemical characteristics of a fibrous band and apparatus for carrying out the method
US9051686B2 (en) * 2011-10-27 2015-06-09 Giorgio Trani Method for modifying the physical and/or chemical characteristics of a fibrous band and apparatus for carrying out the method

Also Published As

Publication number Publication date
GB976195A (en) 1964-11-25
NL267762A (enrdf_load_stackoverflow)
NL121598C (enrdf_load_stackoverflow)
CH394791A (de) 1965-06-30
DE1227773B (de) 1966-10-27
BE605592A (fr) 1961-10-16

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