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US3611841A - Method of producing a coating doctor - Google Patents

Method of producing a coating doctor Download PDF

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Publication number
US3611841A
US3611841A US772624A US3611841DA US3611841A US 3611841 A US3611841 A US 3611841A US 772624 A US772624 A US 772624A US 3611841D A US3611841D A US 3611841DA US 3611841 A US3611841 A US 3611841A
Authority
US
United States
Prior art keywords
blank
coating
doctor
chamfered
edge
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
US772624A
Other languages
English (en)
Inventor
Karl Erik Holger Froden
Hakan Arne Eriksson
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.)
Uddeholms AB
Original Assignee
Uddeholms AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Uddeholms AB filed Critical Uddeholms AB
Application granted granted Critical
Publication of US3611841A publication Critical patent/US3611841A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
    • B05C11/045—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades characterised by the blades themselves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/50—Planing
    • Y10T409/501476—Means to remove flash or burr

Definitions

  • Cl 76/101 R in the longitudinal direction of the blank, over a single hard 90/24, 1 18/ 123 metal bit thereby providing a chamfered surface free from [5 l] Int. Cl B21k 21/00 scratches and grooves detrimental to the evenness of a coating [50] Field of Search 76/101' spread by the resulting doctor blade, and dividing the so- 90/24.04, 24; l 18/ 1 23; 51/98 chamfered blank into doctor blades of suitable lengths.
  • the present invention is related to a method of producing a coating doctor, one longitudinal edge of which is chamfered to form at least one chamfer face for laying on or stripping off a coating on a material, by way of example a paper web.
  • a composition comprising i.a., starch and pigment is laid on by means of a doctor onto a running paper web.
  • the method can either be accomplished in a paper machine or in a separate machine.
  • the doctors used consist usually of a band formed steel tool, one longitudinal edge of which has been chamfered so that they have obtained a chamfered face capable of serving as an active spreading surface during the layingon process.
  • FIG. I shows diagrammatically the operation known per se of a coating doctor
  • FIG. 1 designed a doctor consisting of a bandlike steel tool one longitudinal edge of which is secured in a holder 2.
  • the purpose of the doctor is to spread out a coating 3 onto a web material 4, by way of example a paper web, and abuts to this end in a manner shown in the figure with its other edge towards the web.
  • the coating material may consist, as in the case in the production of cardboard, of for example a composition including clay materials, starch, pigments, etc.
  • the chamfer face 8 has been produced by planing in the longitudinal direction, more particularly by means of one single planing operation with a hard metal bit. By this process substantially no irregularities arise in said chamfer face 8.
  • the planing is accomplished continuously by winding ofia blank wound up to a roller and hardened, tempered and edgeground, from the roller and passing it beyond the stationary hard metal bit which bevels off the edge so as to obtain the very smooth surface 8 by one single step and subsequently the band is divided up in pieces of a suitable length.
  • intersection line 10 between the chamfer face 8 and the side surface6 of the doctor is free from irregularities. Also this desire can be satisfied according to the invention by having the steel band of which the doctor is produced, cold rolled and mechanically surface machined in a manner to make the rolling and machining directions correspond to the longitudinal direction of the doctor.

Landscapes

  • Paper (AREA)
  • Coating Apparatus (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
US772624A 1967-11-07 1968-11-01 Method of producing a coating doctor Expired - Lifetime US3611841A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE15216/67A SE327895B (de) 1967-11-07 1967-11-07

Publications (1)

Publication Number Publication Date
US3611841A true US3611841A (en) 1971-10-12

Family

ID=20300326

Family Applications (1)

Application Number Title Priority Date Filing Date
US772624A Expired - Lifetime US3611841A (en) 1967-11-07 1968-11-01 Method of producing a coating doctor

Country Status (5)

Country Link
US (1) US3611841A (de)
FI (1) FI51616C (de)
FR (1) FR1593122A (de)
GB (1) GB1208188A (de)
SE (1) SE327895B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3785425A (en) * 1972-06-29 1974-01-15 Quaker Oats Co Doctor blade for controlling bulk density of dehydrated cereal products
DE2637828A1 (de) * 1975-08-26 1977-03-10 Inventing Ab Verfahren und vorrichtung zum bestreichen einer sich bewegenden materialbahn, vorzugsweise einer papierbahn
US4031252A (en) * 1976-03-10 1977-06-21 The United States Of America As Represented By The Secretary Of Agriculture Doctoring and drying method
US4220113A (en) * 1978-06-13 1980-09-02 Gerhard Wohlfeil Device for applying a coating to a material web
US5240609A (en) * 1991-11-04 1993-08-31 Enviroquip, Inc. Sludge filtering device and grid system
US5520731A (en) * 1990-10-20 1996-05-28 Zanders Feinpapiere Ag Doctor blade for use in coating continuous strips of material or similar substrates
US5727468A (en) * 1995-05-05 1998-03-17 Heidelberger Druckmaschinen Ag Ductor blade for an offset rotary printing press
US8635755B2 (en) 2010-04-13 2014-01-28 Daetwyler Swisstec Ag Method for producing doctor blades

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1404488A (en) * 1916-12-08 1922-01-24 Union Switch & Signal Co Manufacture of contact fingers for electrical instruments
US2936679A (en) * 1956-07-02 1960-05-17 Giddings & Lewis Method for cutting metal
US2990729A (en) * 1960-05-02 1961-07-04 Mercury Engineering Corp Method and apparatus for straightening and honing doctor blades
US3192835A (en) * 1963-01-15 1965-07-06 Trumpf & Co Beveling tool
US3356067A (en) * 1966-09-14 1967-12-05 Lodding Engineering Corp Doctor blades having relieved ends

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1404488A (en) * 1916-12-08 1922-01-24 Union Switch & Signal Co Manufacture of contact fingers for electrical instruments
US2936679A (en) * 1956-07-02 1960-05-17 Giddings & Lewis Method for cutting metal
US2990729A (en) * 1960-05-02 1961-07-04 Mercury Engineering Corp Method and apparatus for straightening and honing doctor blades
US3192835A (en) * 1963-01-15 1965-07-06 Trumpf & Co Beveling tool
US3356067A (en) * 1966-09-14 1967-12-05 Lodding Engineering Corp Doctor blades having relieved ends

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3785425A (en) * 1972-06-29 1974-01-15 Quaker Oats Co Doctor blade for controlling bulk density of dehydrated cereal products
DE2637828A1 (de) * 1975-08-26 1977-03-10 Inventing Ab Verfahren und vorrichtung zum bestreichen einer sich bewegenden materialbahn, vorzugsweise einer papierbahn
US4031252A (en) * 1976-03-10 1977-06-21 The United States Of America As Represented By The Secretary Of Agriculture Doctoring and drying method
US4220113A (en) * 1978-06-13 1980-09-02 Gerhard Wohlfeil Device for applying a coating to a material web
US5520731A (en) * 1990-10-20 1996-05-28 Zanders Feinpapiere Ag Doctor blade for use in coating continuous strips of material or similar substrates
US5240609A (en) * 1991-11-04 1993-08-31 Enviroquip, Inc. Sludge filtering device and grid system
US5727468A (en) * 1995-05-05 1998-03-17 Heidelberger Druckmaschinen Ag Ductor blade for an offset rotary printing press
US8635755B2 (en) 2010-04-13 2014-01-28 Daetwyler Swisstec Ag Method for producing doctor blades

Also Published As

Publication number Publication date
GB1208188A (en) 1970-10-07
FI51616C (fi) 1977-02-10
DE1807325A1 (de) 1969-06-12
FI51616B (de) 1976-11-01
FR1593122A (de) 1970-05-25
SE327895B (de) 1970-08-31
DE1807325B2 (de) 1976-06-16

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