US3359940A - Blade holding mechanism for coaters - Google Patents

Blade holding mechanism for coaters Download PDF

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Publication number
US3359940A
US3359940A US488090A US48809065A US3359940A US 3359940 A US3359940 A US 3359940A US 488090 A US488090 A US 488090A US 48809065 A US48809065 A US 48809065A US 3359940 A US3359940 A US 3359940A
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United States
Prior art keywords
doctor
blade
clamping
doctor blade
clamping plate
Prior art date
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Expired - Lifetime
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US488090A
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English (en)
Inventor
Rempel Cornelius
Arnold J Schmitt
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Beloit Corp
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Beloit Corp
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Publication date
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Priority to US488090A priority Critical patent/US3359940A/en
Priority to DE1577652A priority patent/DE1577652C3/de
Application granted granted Critical
Publication of US3359940A publication Critical patent/US3359940A/en
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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
    • D21H25/10—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with blades
    • 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
    • B05C11/041—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 means for positioning, loading, or deforming the blades
    • 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
    • B05C11/044—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 means for holding the blades
    • 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
    • D21H5/0065—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 blades

Definitions

  • the pivot for the clamping arms is spaced far enough away from the machined surface of the clamping plate, to enable separation and ready access to the holding and clamping plates, for cleaning.
  • a positioning mechanism enables the ang-le of the doctor blade to be changed as required. This includes a stop for the doctor back and doctor blade which is carried by the main bearing support for the back-up roll. This maintains the stop in the same position relative to the back-up roll, regardless of the angle of adjustment of the doctor blade with respect to the back-up roll.
  • This invention relates to improvements in doctor backs for coaters for coating traveling webs of paper and more particularly relates to an improved form of blade holder for holding the doctor blade to the doctor back.
  • the present invention has as its principal objects to provide an improved form of blade holder for holding a doctor blade to a doctor back arranged with a view toward maintaining a uniform clamping pressure on the doctor 'blade throughout the length thereof.
  • Another object of the invention is to provide a novel form of doctor blade holding mechanism for holding the doctor blade to the doctor back of a web coater, such as is used in the coating of paper and the like, so constructed and arranged as to provide uniform clamping pressure on the doctor blade throughout the length thereof and to widely separate the clamping means from the doctor blade and accommodate ready cleaning of the blade and clamping or holding mechanism, and thereby avoid the nonuniformity of the clamping surfaces caused by the drying up' of coating on the clamping surfaces.
  • Still another object of the invention is to provide a simplified form of blade clamping or holding mechanism for clamping doctor blades to doctor backs of coaters and the like, in which the clamping surfaces are so arranged as to insure a trued doctor blade even though the clamping parts may war-p. p
  • a still further object of the invention is to improve upon the holding mechanisms for holding doctor blades to doctor backs by pivotally mounting the blade clamping members on the doctor back with the pivots thereof spaced a substantial distance from the doctor blade t0 increase the clamping leverage and enable Wide separation of the clamping members for ready wash up of the doctor blade and clamping members.
  • a still further object of the invention is to improve upon the holding mechanisms for doctor -blades formerly in use by clamping the doctor blade to the doctor back by a pivotally movable clamping bar retained in clamping engagement with the doctor blade by power, and by ICC .
  • an improved clamping means for clamping a doctor blade to a doctor back utilizing two accurately machined plates, one serving as ⁇ a supporting plate for the doctor blade and the other serving as the clamping plate for the blade and having a machined t therewith and supported on a series of pivoted clamping arms pivoted to the doctor back in spaced relation with respect to the clamping plate, to assure wide separation of the plates and moved by fluid pressure means to open and close the clamping means and to maintain the clamping means in clamped relation with respect to each other.
  • Still another object of the invention is to provide a clamping means for clampinga doctor blade to a doctor back utilizing a support plate extending the length of the doctor back and secured thereto and clamping the doctor blade to the doctor back by a clamping plate extending for the length of the doctor blade and movably mounted on a series of spaced clamping arms pivoted to the doctor back and moving the clamping plate into clamping engagement with the support plate by power, in which a back-up bar backs up the clamping plate and is mounted on the clamping arms and -has an expansible pressure member extending for the length thereof maintaining uniform pressure on the clamping plate througout the length thereof and thereby holding the doctor blade in alignment, even though the back-up bar may warp.
  • Still another object of the invention is to provide an improved form of blade holding mechanism for holding a doctor blade to a doctor back in which a support plate extends along the front face of the doctor back and is secured thereto and has a uniformly machined blade holding recess with a blade abutment insert recessed therein and extending for the length of the blade for aligning the blade with its clamping plate, in which the clamping plate is clamped to the blade by la series of fluid pressure operated clamping arms and is maintained in true clamping alignment with the blade by an inflatable fluid pressure operated member extending for the length of the clamping plate.
  • Still another object of the invention is to provide an improved form of retractible guard for a doctor blade, preventing gouging of the back-up roll, and protecting the blade from damage when adjustably moving the blade toward the doctor back and serving as a safety guard, preventing injury that may be caused by brushing along the bare blade.
  • a still further object of the invention is to provide a novel and improved form of support for the doctor blade and doctor back of a flooded nip coater, in which the limit of movement of the doctor blade toward the back-up roll of the coater is obtained by an improved form of stopping arrangement always stopping the doctor blade in the same relative relation with respect to the back-up roll regardless of variations in load angle of the doctor blade.
  • FIGURE 1 is a fragmentary View in side elevation of a flooded nip coater constructed in accordance with the principles of the present invention, with the coating pan partially shown in phantom and the bearing support for the back-up roll broken away;
  • FIGURE 2 is a viewy in side elevation of a doctor back with the supports and adjusting mechanism therefor ⁇ re moved, in order to illustrate the clamping mechanism for y the doctor blade;
  • FIGURE 3 is a view somewhat similar to FIGURE Z but showing the clamping means for the doctor blade open and the doctor blade and doctor back in a wash up position.
  • 10 generally designates a coating device, which comprises a back-up roll or drum 11, partially wrapped by a traveling sheet or web W, and an applicator roll 12 picking up coating material from a coating bath pan 13, partially indicated by dot-dash lines.
  • the applicator roll 12 picking up coating material from the coating bath pan 13 applies the coating material to the sheet W wrapped beneath and traveling with the backup roll 11 in the nip between said applicator roll and backup roll.
  • the coating device also includes a doctor blade 15 mounted on and extending along the front face of a doctor back 16, trunnioned on a base 17 on trunnion shafts 1S journalled in trunnion supports 19.
  • the trunnion supports 19 are mounted on and extend upwardly of a support plate 20 mounted on the top of the base 17, for adjustable movement toward and from the axis of the backup roll 11, to vary the angle of the doctor blade 15 with respect to the back-up roll. Adjustment of the support plate 20 along the top surface of the base 17 is attained by operation of an adjustment screw 21 threaded in a nut 22 depending from the support plate.
  • the adjustment means is no part of the present invention so need not herein be shown or described further.
  • At least one iluid pressure operated cylinder 23 is provided to hold the doctor back in position about the axis of the trunnion shaft 18 and to pivot said doctor back away from the back-up roll 11 into a threading position, and into an extreme retracted clean up position, such as is shown in FIGURE 3.
  • the cylinder 23 is trunnioned to the base 17 beneath the adjustable support plate 20 on trunnion pins 24 in a conventional manner.
  • the cylinder 23 has a piston (not shown) therein having a piston rod 25 extensible therefrom, having a clevis 26 at its upper end, pivotally connected by a pivot pin 27 to an arm 29 of a bell crank 30.
  • the bell crank 30 is pivoted for movement about an axis coaxial with the axis of the trunnion pins 18.
  • the bell crank 30 has a second upright arm 31 extending upwardly of the pivot thereof in angular forwardly spaced relation with respect to the arm 29 and engageable with an adjustable stop 32 on an arm 33 extending from a bearing bracket 35 for the back-up roll 11 toward the doctor back 16.
  • the adjustable stop 32 may be a micrometer stop to provide a line adjustment of the position of the doctor blade 15 with respect to the face of the back-up roll 11.
  • the adjustable stop 32 being mounted on the bracket or arm 33 extending from the main bearing bracket for the back-up roll 11, Will always be in the same location relative to the back-up roll for all positions of adjustment of the angle of the doctor blade with respect to the back-up roll.
  • the stop for the doctor back when adjustably moved toward the back-up roll has heretofore been attained by the piston of the positioning cylinder when the piston reaches the end of its travel. This has meant that the length of travel of the piston must be changed each time the doctor back is adjusted toward or from the back-up roll, to change the angle of the doctor blade. The necessity of readjusting the travel of the piston each time the load angle is changed is therefore eliminated by mounting the stop on the bearing for the back-up roll.
  • the doctor back 16 and doctor blade 15 are loaded by two loading diaphragms 36 and 37 mounted at their outer ends on a plate or pressure pad 39, shown in FIGURE 1 as formed integrally with the arm 29 of the bell crank 30 and mounted on a plate or pressure pad 40 at their opposite ends.
  • the pressure pad ⁇ 40 is shown as being formed integrally with a loading arm 41 which may be secured to an outer end of the doctor back 16 and which is shown as extending angularly upwardly and rearwardly therefrom.
  • the diaphragms 36 and 37 are shown in FIGURE 1 as being in the form of air springs of a conventional construction, and may be supplied with air under pressure to delicately load the doctor back 16 ⁇ and doctor blade 15 with respect to the Web W, or to accurately space the doctor blade from the web and back-up roll 11, as required in certain coating conditions.
  • a stop bolt 42 is shown as being threaded in the plate or pressure pad 39 ⁇ and as being locked in position by a nut 43.
  • the head of the stop bolt determines the retracted position of the loading arm 41 with respect to the lever arm 29 of the bell crank 30 and prevents complete collapse of the diaphragms 36 and 37.
  • a blade supporting plate 45- extends along a front face 46 of the doctor back 16 and faces in the general direction of the back-up roll 11.
  • the blade supporting plate 45 has a substantial surface extending along the front face 46 of the doctor back and is located with respect to the doctor back as by a key 47.
  • the blade Supporting plate 45 is also bolted or otherwise secured to the front face of the doctor back.
  • the blade supporting plate 45 has a rectangular recess 48 formed therein and opening to the front and top thereof and forming a recess for a holding insert bar 49.
  • the bar 49 forms an abutment bar for the rear face of the blade 15 and may be bolted or otherwise secured l to the blade supporting plate 45.
  • the bar 49 may be machined to the exact size of the recess 48 to cooperate with a clamping plate 50 engageable with the front face of the doctor blade 15 and holding the balde to the blade supporting plate 45.
  • the bar 49 may also be undersized and shimmed to accommodate adjustment of the bar for blades of different thicknesses.
  • the bolting means for bolting the bar 49 to the recess 48 may be in the form of jacking screws to jack the bar, to provide a true front abutment face of the bar abutting the blade 15.
  • the recess 48 and holding insert bar 14 being accurately machined, the bar 49 normally provides a true front face engaging the back face of the blade 15, and it ordinarily is not necessary to jack the bar to provide a true blade engaging face, except where warpage of the bar 49 or plate 45 may occur.
  • the blade supporting plate 45 also has a forwardly stepped recess 51 formed therein providing an abutment and seating recess for the blade 15 and having a lower shoulder 52 against which the bottom of the blade seats.
  • the blade supporting plate 45 also has a forwardly opening rectangular slot 53 extending therealong beneath the blade seating recess 51, for receiving a tongue 55 of the clamping plate 50.
  • the recess 51, shoulder 52, slot 53 and forwardly facing surfaces between said recess and slot are all true and accurately machined surfaces to be interengaged by corresponding trued and accurately machined surfaces on the clamping plate 50, during an operation of clamping the blade 15 in position.
  • the clamping plate 50 is movably mounted on and eX- tends above the tops of a series of clamping arms 61 spaced along the front face of the doctor back at suitable intervals and is abutted by an inilatable tube 56 recessed within a recess 57 formed in a loading or back-up bar 58, extending for the length of the clamping plate 50.
  • the loading bar 58 is mounted in shouldered recesses 59, of right angled clamping bar holders 60, mounted on and extending upwardly of the tops of the clamping arms 61.
  • the clamping arms 61 and their mountings on the front face of the doctor back are all of the same construction, sollone only need herein be shown and described in deta'
  • the clamping arm 61 is pivoted intermediate its ends in downwardly spaced relation with respect to the clamping plate 50 on a pivot pin 62, mounted in an ear 63, suitably secured to the front face 46 of the doctor back 16 and extending forwardly therefrom.
  • the lower end of the clamping arm 61 is pivotally connected to a connector end 65 of a piston rod 66 on a pivot pin 67.
  • the piston ⁇ rod 66 is extensible from a cylinder 69 extending along the bottom lof the doctor back 16 and suitably supported thereon.
  • the cylinder 69 may be an air cylinder and the application of fluid under pressure, such as air, to the -head end thereof will move the clamping arm 61 in a direction to position the clamping plate 50 into clamping engagement with the front face of the blade 15.
  • the pivot for the clamping arms 61 is spaced a sucient distance beneath the machined surfaces of the supporting plate 45 and the clamping plate 50, to enable said surfaces to be widely separated for washing, to Iaccommodate a thorough Washing of the machined surfaces, and thereby prevent the drying up of coating on the surfaces, which would counteract the close tolerance machining of the machined surfaces of the clamping plate 50 land support plate 45.
  • the clamping plate 50 mounted on the upwardly facing surface of the clamp holder 60 for slidable movement therealong towards and from the blade supporting plate 45, when positioned in a clamping position by the clamping arms 61 and held in such a position by the cylinder 69 and piston 66, is moved into tight clamping engagement with the doctor blade by ination of the inflatable tube 56, which may be inflated by air, and which may be bonded to the rear face of the clamping plate 50.
  • the inflatable tube 56 therefore, supplies the pressure to clamp the clamping plate 50 to the blade 15 and to uniformly hold said clamping plate into engagement with the front face of the blade supporting plate 45, and hold the blade true regardless of warpage of the back-up bar 57.
  • a plurality of cylinders 69 may be provided to actuate the clamping arms 61, and that an individual cylinder may be provided for each clamping arm under certain operating conditions.
  • the doctor back is shown as being tilted about the axes of the trunnion pins 18 into a clean up position.
  • the piston rod 66 may be retracted by the admission of fluid under pressure to the piston rod end of the cylinder 69 to the full extent of its retracted travel, to open the clamping plate 50 with respect to the supporting plate 45 into position to accommodate the free cleaning of coating from the machined surfaces of the supporting plate and clamping plate, at the termination of a coating run, to avoid the collection of coating material on the machine surfaces, as well as on other critical parts of the holding mechanism.
  • An angular deliector 70 is recessed in a rectangular recess 71 of the clamping plate 50, and extends angularly downwardly of the clamping plate 50 over the back-up bar 58 and beyond the upper ends of the clamping arms 61, to protect the back-up bar and to prevent coating from lodging in the space between the back-up bar 57 and the front face of the clamping plate 50.
  • a retractible blade guard 73 is pivotally mounted on the top of the doctor back 16.
  • the blade guard 73 as herein shown, comprises a plate 74 supported on spaced arms 75, extending rearwardly therefrom and pivotally mounted on the top of the doctor back 16 on pivot pins 76 extending through ears 77 extending upwardly of the top of the doctor back.
  • the guard plate 74 is shown as having a channel-like rubber tip 78 fitting along the advance edge thereof, to protect persons working around the doctor from injury which may be caused by brushing against the advance edge of the guard and to prevent the guard from gouging the back-up roll 11, when in a safety guarding position.
  • the blade guard 73 is normally in the retracted position shown in FIGURE 2 when the coater is in operation and is moved into its extended position during the threading or wash up operations to protect the doctor blade and also to prevent injury of the operator by the sharp edge of the blade.
  • doctor blade adapted to be mounted on said doctor back and extending therealong
  • a guard transversely pivoted to said top surface of said doctor back for movement about an axis parallel to the axis of pivotal movement of said clamping arms, and manually positionable over the doctor blade to act as a safety guard for said doctor blade when said clamping plate is released from said doctor blade ⁇ during clean up of said clamping plate and doctor blade.
  • doctor blade adapted to be mounted on said doctor back to extend along said front face
  • fluid pressure cylinder piston means for moving said back-up bar and clamping plate toward the front face of the doctor back and maintaining said clamping plate in clamping engagement with the doctor blade
  • clamping arms supporting said clamping plate for movement into and out of clamping engagement with said doctor blade
  • doctor blade adapted to extend along said front face of said doctor back in advance thereof and upwardly therealong
  • a blade supporting plate secured to and extending along the front face of said doctor back and having a doctor blade seating recess extending therealong
  • clamping arms supporting said clamping plate for movement into and out of clamping engagement with said doctor blade
  • doctor back having a front face facing generally in the direction of the back-up roll, and mounted for movement toward and from said back-up roll about an axis parallel to the axis of rotation of said roll and spaced therefrom,
  • doctor blade adapted to extend along said doctor back and be positioned thereby in doctoring cooperation with said back-up roll
  • doctor blade means clamping said doctor blade to said doctor back comprising a blade supporting plate secured to and extending along the front face of said doctor back and upwardly therefrom and having a doctor blade seating recess extending therealong,
  • uid pressure operated means for pivotally moving said clamping arms tow-ard and from said blade supporting plate
  • a clamping plate movably mounted on said arms and backed up by said back-up bar and moved by said arms toward said blade supporting plate into a clamping position, and separated from said blade support- 8 ing plate by said arms into a widely open clean up position, and an inflatable tube recessed in said backup plate and having engagement with said clamping plate for the length thereof, for exerting a uniform clamping pressure on said clamping plate and the blade seated in said blade supporting plate upon the supply of fluid under pressure to said inflatable tube.
  • doctor back having a front face facing in the general direction of the back-up roll and pivotally mounted for movement toward land from the back-up roll
  • said blade supporting plate having a forwardly and upwardly -opening machine finished blade seating recess extending therealong
  • a plurality of parallel spaced clamping arms pivotally mounted on said doctor back in advance of the front face thereof and having upper support ends, a back-up bar mounted on said clamping arms and extending along said clamping plate,
  • fluid pressure operated means for moving said clamping arms, back-up bar and clamping plate toward and from said blade supporting plate
  • said clamping plate having a face machine finished to accurately conform to said recess and the machine nished front face of said blade supporting plate and the blade seated in said recess, and movable into said recess by operation of said clamping arms into clamping engagement with -a doctor blade seated in said recess, and power means between said back-up bar and clamping plate for exerting uniform clamping pressure on said clamping plate throughout the length thereof.
  • a removable clamping insert bar is mounted in said recess and forms a clamping abutment surface for the rear face of the doctor blade
  • back-up plate has a recess therein opening to said clamping plate
  • the power means comprises an inflatable tube extending along said recess into engagement with an adjacent face of said clamping plate for exerting uniform clamping pressure on said clamping plate throughout the length thereof.
  • a doctor for web coaters and the like comprising,
  • a doctor back pivotally mounted for cooperative movement toward and from a back-up roll of the web coater
  • said doctor back having a front face facing in the general direction of the back-up roll and having a blade supporting plate extending along the front face of said doctor back and upwardly therefrom,
  • said blade supporting plate having a machine finished recess extending for the length thereof opening to the top and front of said plate, and forming a doctor blade seating recess and having a removable insert bar recessed. in and extending along the top thereof and having a front face in general alignment with a front face of said blade seating recess,
  • said blade supporting plate also having a downwardly spaced machine finished slot extending therealong, opening to said front wall,
  • a clamping plate carried by said clamping arms and extending upwardly therefrom and having a machine finished face generally confor-ming -to the machine finished face of said support plate and including a tongue extending therefrom fitting within said slot in said support plate and assuring uniform clamping of a doctor blade to said blade seating recess.
  • clamping plate is movably mounted on said clamping arms for movement toward and 'from said support plate
  • an inatable tube carried by said backing plate has engagement with an adjacent face of said clamping plate for the length thereof, for exerting a uniform pressure on said clamping plate to effect uniform clamping of the doctor blade to said insert for the length thereof.
  • a retractible guard is transversely pivoted to the top surface of said doctor and extends for the length thereof and is positionable to extend over said ⁇ doctor blade during a web threading and cleaning operation and is retractible to be free from said ⁇ doctor blade during a coating operation.
  • a doctor 4back supporting said doctor blade and operable to move said doctor blade toward and from said back up roll and to vary the angle of said doctor -blade with respect to said back-up roll
  • spaced trunnion supports for supporting said doctor back for adjustable movement about an axis parallel to the axis of rotation of said back-up roll
  • tluid pressure means for moving said doctor blade and doctor back toward and from said back-up roll
  • said stop means always being in the same position relative to said back-up roll regardless of the position of adjustment of said doctor back and blade with respect to said back-up roll, to change the blade angle of said doctor blade.
  • doctor yback is rectilinearly adjustable toward and from the back-up roll to vary the angle of the doctor blade with respect to the periphery vof the back-up roll
  • uid pressure operated loading means are provided to load said doctor blade with respect to said back-up roll.
  • the means for moving the doctor back a-nd blade toward and from the back-up roll about the u axis of pivotal movement of said doctor back comprises,
  • doctor back is mounted for rectilinear fmovement in a horizontal plane toward and from the back-up roll to vary the angle of the doctor blade with respect to said back-up roll
  • stop means comprises a stop arm mounted on the bearing support for said back-up roll and extending toward said doctor back and having a stop on the end thereof facing said doctor back,
  • bell crank has a second upright arm engageable with said stop and limiting movement of said bell crank and doctor kback toward said back-up roll.
  • doctor blade means clamping said doctor blade to said doctor back comprising a blade supporting plate secured to and extending along the front face of said doctor back and having a doctor blade seating recess extending therealong,
  • clamping arms supporting said clamping plate for movement into and out of clamping engagement with said doctor blade

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  • Paper (AREA)
US488090A 1965-09-17 1965-09-17 Blade holding mechanism for coaters Expired - Lifetime US3359940A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US488090A US3359940A (en) 1965-09-17 1965-09-17 Blade holding mechanism for coaters
DE1577652A DE1577652C3 (de) 1965-09-17 1966-09-17 Beschichtungsvorrichtung für eine Papierbahn

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Application Number Priority Date Filing Date Title
US488090A US3359940A (en) 1965-09-17 1965-09-17 Blade holding mechanism for coaters

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US3359940A true US3359940A (en) 1967-12-26

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Cited By (6)

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Publication number Priority date Publication date Assignee Title
US3817208A (en) * 1971-10-13 1974-06-18 Feldmuehle Anlagen Prod Coating apparatus for sheet material
FR2428473A1 (fr) * 1978-06-13 1980-01-11 Jagenberg Werke Ag Dispositif pour l'application continue d'une enduction sur une bande de materiau
US4315478A (en) * 1979-05-24 1982-02-16 A-T-O Inc. Doctor blade for labeling machine
US5868841A (en) * 1994-05-27 1999-02-09 Voith Sulzer Papiermaschinen Gmbh Blade holder with swiveling device for positioning with respect to a device for transporting a material web
WO2002102522A1 (en) * 2001-06-15 2002-12-27 Btg Eclepens S.A. Assembly for blade coating
CN112030601A (zh) * 2020-08-21 2020-12-04 南通凯迪自动机械有限公司 一种耐磨纸生产装置

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Publication number Priority date Publication date Assignee Title
DE2555669C3 (de) * 1975-12-11 1984-10-18 J.M. Voith Gmbh, 7920 Heidenheim Vorrichtung zum Abstreifen überschüssiger Streichmasse
DE3940450A1 (de) * 1989-12-07 1991-06-13 Voith Gmbh J M Rakeleinrichtung
DE19619249A1 (de) * 1996-05-13 1997-11-20 Voith Sulzer Papiermasch Gmbh Auftragwerk zum direkten oder indirekten Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn

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US3006275A (en) * 1960-05-13 1961-10-31 Inta Roto Machine Company Inc Micrometer doctor bar assembly
CA638880A (en) * 1962-03-27 Bird Machine Company Doctor assembly
US3138207A (en) * 1960-06-20 1964-06-23 Halliburton Co Pressure balanced actuating device
US3245378A (en) * 1962-05-14 1966-04-12 Kimberly Clark Co Doctor blade holders for a papermaking machine
US3255038A (en) * 1964-10-13 1966-06-07 Black Clawson Co Method for establishing the proper working position of a doctor blade

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Publication number Priority date Publication date Assignee Title
CA638880A (en) * 1962-03-27 Bird Machine Company Doctor assembly
US3006275A (en) * 1960-05-13 1961-10-31 Inta Roto Machine Company Inc Micrometer doctor bar assembly
US3138207A (en) * 1960-06-20 1964-06-23 Halliburton Co Pressure balanced actuating device
US3245378A (en) * 1962-05-14 1966-04-12 Kimberly Clark Co Doctor blade holders for a papermaking machine
US3255038A (en) * 1964-10-13 1966-06-07 Black Clawson Co Method for establishing the proper working position of a doctor blade

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3817208A (en) * 1971-10-13 1974-06-18 Feldmuehle Anlagen Prod Coating apparatus for sheet material
FR2428473A1 (fr) * 1978-06-13 1980-01-11 Jagenberg Werke Ag Dispositif pour l'application continue d'une enduction sur une bande de materiau
US4315478A (en) * 1979-05-24 1982-02-16 A-T-O Inc. Doctor blade for labeling machine
US5868841A (en) * 1994-05-27 1999-02-09 Voith Sulzer Papiermaschinen Gmbh Blade holder with swiveling device for positioning with respect to a device for transporting a material web
WO2002102522A1 (en) * 2001-06-15 2002-12-27 Btg Eclepens S.A. Assembly for blade coating
US20040144303A1 (en) * 2001-06-15 2004-07-29 Tore Eriksson Assembly for blade coating
CN112030601A (zh) * 2020-08-21 2020-12-04 南通凯迪自动机械有限公司 一种耐磨纸生产装置

Also Published As

Publication number Publication date
DE1577652B2 (de) 1973-06-14
DE1577652C3 (de) 1974-01-17
DE1577652A1 (de) 1971-11-18

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