Abstract: A varnish scraper is fitted to a varnish applicator roller to scrape off extra varnish which has remained after the varnish has been supplied to a blanket drum. The scraped extra varnish is circulated to a varnish vessel for re-using.

Abstract: A developing device including a toner support member for supporting toner on its surface, which is so provided as to confront an electrostatic latent image support member and a regulation member for forming a thin layer of the toner on the toner support member, which includes a curved member for pressing the toner support member and a support member for supporting the curved member such that an area S of a space satifies an equation: 0<S.ltoreq.0.15 mm.sup.2 wherein the space is defined in a radial plane of the toner support member and the curved member and is bounded by the toner support member, the curve member and a line drawn in parallel with a normal extending through a point of contact between the toner support member and the curved member and spaced a radius of curvature of the curved member from the normal at an upstream side of the normal in a direction of rotation of the toner support member.

Abstract: A nozzle having a flexible blade member with a flat adhesive-receiving surface in combination with a rotary transfer roll and side wall elements forms a reservoir for adhesive "upstream" (in the direction of roll rotation) of the line of contact of a straight edge of the surface with the roll surface, the arrangement being such that a layer of the adhesive, doctored by blade member to control its thickness and with its width controlled by the wall elements, is applied to the roll surface and carried thereby to the operating locality. An adhesive supply system is also provided for supplying adhesive to the reservoir, said system including a melting device for adhesive in solid form and pressure control means for controlling the pressure under which the adhesive is supplied.

Abstract: An apparatus for doctoring a cylindrical rotating surface, comprising a doctor back mounted for rotation about a first axis, and a blade carrier assembly mounted on the doctor back for rotation about a second parallel axis. A doctor blade is removably supported by the blade carrier assembly and is loaded against the rotating surface by a force applied to rotate the doctor back about the first axis. A liquid filled flexible walled tube extends along the second axis between the doctor back and the blade carrier assembly. The blade angle is adjusted by expanding and contracting the liquid filled tube to rotate the blade carrier about the second axis.

Abstract: A doctor blade assembly consisting of a first section and a second section. The first section acts as a backup for the second section. The second section includes a leading portion, which is of a reduced thickness and has a bevel to wipe excess ink from a gravure cylinder. The first and second sections are adhered to each other. The second section can be notched to alleviate the deleterious effects of camber.

Abstract: An apparatus for making laminated dual and multiple arch corrugated structures including a first unit for making single-face corrugated members formed of a corrugated member and an attached liner and a second unit for combining one or more single-face corrugated structures into a double-face structure. The subject invention includes a novel mechanism for laminating one or more portions of the single-face or double-face corrugated structures and/or for impregnating one or more of the members of the such structures with an impregnating substance. The subject improvements also reside in a novel hold down roll construction to prevent wrinkling of the edge portions of web members used in the construction of corrugated panels.

Abstract: A double-facer unit includes an applicator roller having a cylindrical outer surface with spaced depressions distributed relatively uniformly over the surface thereof, mechanisms for maintaining corrugation ridges opposite from the liner side of the single-face web against an arcuate portion of the outer surface of the applicator roller for applying adhesive thereto, and an adhesive container having adhesive therein exposed to the cylindrical surface of the applicator roller in the double-facer unit whereby the adhesive contained in the container is transferred to the surface of the applicator roller including into the depressions therein, a device associated with the adhesive container for scraping excess adhesive from the roller but not from the depressions whereby the adhesive remaining in the depressions is transferred to the corrugation ridges on the single-face web when in contact therewith, and mechanisms for maintaining predetermined tension on the single-face web during the time the adhesive in the d

Abstract: A coating feeder system is disclosed herein. The coating feeder system comprises, in close vicinity to an outer peripheral surface of a gravure roll, a coating container or vessel defining a reservoir for storing a coating under a pressurized condition and a stirring mechanism for stirring the coating within the reservoir. The stirring mechanism may be a stirring and feeding roll mounted within said reservoir. The stirring and feeding roll includes forcedly stirring means formed on an outer peripheral surface thereof for forcedly stirring the coating.

Abstract: A doctor blade assembly adapted for applying liquid uniformly to a rotating transfer roller includes an applicator head having a channel-like cavity extending longitudinally parallel to the transfer roller axis. A pair of doctor blades extend obliquely from the longitudinal edges of the channel to impinge on the circumferential surface of the transfer roller. The blades each may be secured by longitudinally spaced screws, or by a blade holder secured to a longitudinal piano hinge and spring biased to clamp the respective blade. A pair of rotary end seals are joined to the opposed ends of the channel to form a sealed chamber against the transfer roller. Each end seal includes an end plate resiliently impinging on the end surface of the transfer roller, and a seal member secured to the end plate and disposed to engage the endmost portion of the circumferential roller surface. A plurality of mounting lugs extend outwardly from the applicator head, each lug including a stepped, semi-cylindrical portion.

Abstract: An apparatus for applying spaced apart discontinuous stripes of a fluid to the surface of a moving web. The apparatus includes a rotating applicator roll partially immersed in a bath of the fluid. A notched doctor blade in contact with the surface of the roll removes fluid from the surface of the roll except in the region of the notches to form spaced apart circumferential beads of the fluid on the surface of the roll. The moving web partially wraps the applicator roll where the beads are formed, but is travelling between 20 to 200 times the speed of the surface of the applicator roll, which results in a relatively even distribution of the fluid, in the form of a discontinuous stripe, on the surface of the web.

Abstract: A glue applicator for a labeling machine has the customary glue roller rotating about a vertical axis. A scraper blade is held adjacent the periphery of the roller to remove excess glue from the roller so that a label to which glue is transferred from the roller will not receive a coating of more than desirable thickness. Relatively small blade inserts provide the sharpened edges for scraping the excess glue from the roller. A support member is mounted to a carrier that swings about an axis parallel to the axis of the roller. The blade insert is clamped against the support member by means of a clamping member whose clamping force is developed by bolts that pass through the clamping member and are threaded into the support member. Eccentric elements are provided for adjusting the support member and, hence, the blade insert carried thereon to achieve a uniform and accurate gap between the scraping edge of the blade insert and the periphery of the roller.

Abstract: In an electrophotographic developing device, its doctor blade disposed adjacent to a magnetic roll so as to control the thickness of a layer of magnetic developing agent conveyed by the magnetic roll has an edge which is curved in such a manner that the gap between the edge and the magnetic roll is a minimum in the vicinity of the middle of the magnetic roll, whereby the layer of magnetic developing agent is made uniform in thickness and the printing density is made uniform despite gravitational sagging of the roll.

Abstract: A coating press apparatus is disclosed for coating a first and second side of a pressed web formed in a forming section of a papermaking machine. The apparatus includes a first press roll which defines a smooth imperforate first surface. The first surface cooperates with the first side of the web. A first backing roll cooperates with the first press roll for defining therebetween a first nip for the passage therethrough of the web. A first felt supports the web during passage through the first nip and a first short-dwell coater applies a coating directly to the surface of the first press roll upstream relative to the first nip such that a smooth and even first layer of the coating substance is applied to the first side of the web during passage of the web through the first nip.

Abstract: An apparatus for doctoring a cylindrical rotating surface, comprising a doctor back mounted for rotation about a first axis, and a blade carrier assembly mounted on the doctor back for rotation about a second parallel axis. A doctor blade is removably supported by the blade carrier assembly and is loaded against the rotating surface by a force applied to rotate the doctor back about the first axis. A liquid filled flexible walled tube extends along the second axis between the doctor back and the blade carrier assembly. The blade angle is adjusted by expanding and contracting the liquid filled tube to rotate the blade carrier about the second axis.

Abstract: In the application of a solvent to a plastic label carried on the surface of a vacuum drum, the solvent for the plastic label is transferred from a gravure roll to the label at finite areas on the label so that the label can adhere to the bottle to be labeled and to itself to form a complete sleeve label. The gravure roll is supplied from a fountain block with a part cylindrical face that engages the gravure roll in face to face contact. The fountain block is retained in a holder with spaced adjustment devices for adjusting the position of the fountain block in the holder.The fountain block holder is pivotally attached to each of a pair of spaced apart plates about a first axis and the pair of spaced apart plates are pivotally attached to a second pair of spaced apart plates about a second axis which is spaced from and extends parallel to the first axis.

Abstract: In a developing apparatus for developing an electrostaticlatent image by applying a charged developer to the electrostatic-latent image formed on a surface of an image carrier, a housing which stores the developer and has a developing roller for feeding the developer therefrom to a developing position. A recovering blade for recovering a residual developer on the developer roller in the housing is urged against developer roller. The recovering blade has a conductive portion in contact with the developing roller so as not to non-uniformly or abnormaly triboelectrically charge a developer passing over it into the housing.

Abstract: A coating system is disclosed comprising apparatus for coating webs comprising a rigid, elongated trough, a cylindrical applicator mounted for rotation about its axis within the trough, the trough having an arcuate upstream liquid retaining surface and an arcuate downstream liquid retaining surface substantially parallel to and closely spaced from the lower surface of the cylindrical applicator to define an arcuate coating zone, a manifold between the upstream liquid retaining surface and the downstream liquid retaining surface, the manifold extending substantially parallel to the axis of the cylindrical applicator, the arcuate downstream liquid retaining surface and the arcuate upstream liquid retaining surface extending from the manifold upwardly a sufficient distance along the periphery of the cylindrical applicator to retain most of any liquid in the coating zone, a wall at each end of the trough to retain the liquid in the coating zone, each of the walls being closely spaced from the adjacent end of the

Abstract: A coating material is transferred to the surface of a spreader-roll from a spreader-mechanism. The spreader-roll is partly wrapped by a strip of material. In the location where the said strip of material is lifted off the spreader-roll, a doctor-element, comprising a doctor-blade, is arranged to rest tangentially on the spreader-roll. The doctor-element thereby forms a rubbing distributing surface which faces the strip of material and ensures a smooth and uniform coating of the coating material on the strip of material. The strip of material is then carried away over a sharp tear-off edge on the doctor-element at an angle of less than 20.degree.. In this way a coating of any desired thickness may be applied to a strip of material, more particularly as a coating for a strip of paper.

Abstract: An ink metering system for a rotating ink roll having a shaft journalled in the frame of a inking system includes two doctor blades and a mechanism for supporting the doctor blades on the shaft of the ink roll so that the doctor blades contact the ink roll under uniform pressure independent of movement between the ink roll and the frame. The arrangement also includes a mechanism for adjusting the pressure of the doctor blades and for sealing the system. The doctor blade is composed of polytetrafluoroethylene-polyphenylene sulfide ceramic resin containing graphite fibers. The doctor blade includes a number of laminated sheets of this material in which a majority of the sheets include fibers oriented in the machine direction and at least one sheet includes fibers oriented perpendicular to the machine direction.

Abstract: A labeling system where a cylindrical vacuum drum carries plastic labels at spaced intervals on its surface and a solvent applying gravure roll is held at a specific spacing from the drum and labels so that the labels will receive the solvent when they pass the rotating roll. The gap between the drum and the roll must be carefully controlled in order to be assured that the solvent is properly transferred. The gap is controlled by a fine adjustment of the platform on which the roll is mounted relative to the drum by a threaded rod moving a tapered surface of a reciprocable member in contact with a stop block mounted on the platform. The threaded rod threads through a stationary bracket and turns a shaft that threads into the member. The member is prevented from rotation so that rotation of the rod moves the member in one direction while rotation of the shaft moves the member in the opposite direction.

Abstract: An adhesive applicator for a labeling machine. It consists of an adhesive roller, especially one with a resilient surface, of an adhesive-supply mechanism, of an adhesive doctor positioned behind the supply mechanism in relation to the direction that the roller rotates in, and of a label getter with an adhesive-pickup surface that is in particular rigid and that rolls over the surface of the adhesive roller.

Abstract: A coater includes an impression cylinder and a gravure cylinder rotatably mounted. A first pivot arm unit is pivoted on the impression cylinder shaft and supports a pivot shaft. Depending pivot arms on the shaft support an offset cylinder to one side of the impression cylinder and above the gravure cylinder. Nip adjustment units for the pivot arm unit and the depending pivot arms each include a pre-loaded ball bearing lead screw coupled to a slide housing and a separate power cylinder connected to the pivot unit and pivot arms respectively. The power cylinder unit forces the pivot structure into engagement with the lead screw follower which acts as a stop. A stepping motor rotates the lead screw and accurately positions the stop and thereby the pivot structure as a result of the power cylinder units. The lead screws separately control the nip setting of the off-set cylinder relative to the impression cylinder and the gravure cylinders.

Abstract: A developing unit is disclosed which utilizes a two-component developer comprising a toner and a carrier to develop an electrostatic latent image formed on a photosensitive member. The unit comprises a doctor for controlling the amount of developer supplied onto a developing sleeve, a flow plate for receiving a quantity of developer scraped off by the doctor and allowing it to flow therealong, at least one deflector plate disposed at an angle on the flow plate for causing the developer to be directed toward one side, and a screw assembly for conveying the developer which has been directed toward one side to the other side and returning it to the interior of a developer vessel.

Abstract: In the application of a solvent to a plastic label carried on the surface of a vacuum drum, the solvent for the plastic label is transferred from a gravure roll to the label at finite areas on the label so that the label can adhere to the bottle to be labeled and to itself to form a complete sleeve label. The gravure roll is supplied from a fountain that is held against the roll under a spring force. The fountain is in the form of a plastic block which has a face that has several undercut channels in one of which the solvent is supplied and with the others acting as doctor channels to carry away any excess solvent from the roll surface.The fountain block is held by a vertical support plate that, in turn, is held to the surface of a vertical mounting plate by a quick release toggle clamp.

Abstract: A glue applying device for a labeling machine equipped with a roller rotating about a vertical axis while a mass of glue is fed to one side. A glue scraper blade is mounted for swinging about a vertical axis into a position where the blade edge wipes off the mass of glue and leaves a film of glue on the roller. A lever extends radially from the blade axis. A micrometer adjustment screw is threaded through a pivoting arm for its tip to act on the lever. The screw has a turning knob in which a graduated thickness indicating dial is rotatable. A block is mounted to the arm and it has a bore through which the adjustment screw passes. There is an index mark on the block next to the dial. A compression spring in the bore holds the knob against self rotation. When the screw is turned to its limit against the lever, the dial is turned in the knob until the zero mark on the dial scale aligns with the index mark.

Abstract: A labeling device for bottles and the like features a rotor turning about a vertical axis and having a plurality of semi-circular glue pallets arranged in a circle on the rotor and oscillated through a limited angle as the rotor rotates. The pallets, after having contacted a glue coated roller, encounter the foremost label in a magazine and adhere to the label for moving the label to a transfer drum from which it is applied to the vessel in labeling position. The rotor is supported in a gear box and the glue roller is connected in a detachable manner at its end most remote from the gear box with a rigid arm having a stud shaft that engages the glue roller in a roller bearing. The arm is also provided with a stud shaft that makes a releasable connection with the rotor coincident with its axis to provide further support for the arm.

Abstract: To provide for a tight fit between adjacent tongues (4, 4') subdividing a doctor blade (1), one edge (9) of a tongue (4) facing a slit (5) between the tongues is coated with a material substantially softer than the material of the doctor blade, for example galvanically deposited copper, with a thickness which is in excess of the width of the slit (5) separating the adjacent tongues (4, 4'). Upon closing of the tongues with respect to each other, after having been spread, the tongues will shear off the softer material so that the then formed remaining separation between the tongues will have effectively or quasi zero dimension, thus forming a tight fit between the tongues, while still permitting individual adjustability with respect to a roller against which the doctor blade is to operate.

Abstract: A finger-type doctor blade holder has a plurality of pressure fingers spaced along the underside of a loading plate. A doctor blade is removably supported in recesses defined between the pressure fingers and the loading plate, and the pressure fingers are mounted for pivotal movement about an axis extending across the surface to be doctored. A flexible loading tube is located alongside the finger pivot axis in a tube tray, and a force transmitting member is interposed between the pressure fingers and the loading tube. The rigidity of the force transmitting member prevents upward bulging of the loading tube between the pressure fingers, and the surface of the loading tube is indented by either the force transmitting member or a separate member at the base of the tube tray. The indentation in the tube surface enables the tube to act as a rolling diaphragm when compensating for variations in the distance between the pressure fingers and the base of the tube tray.

Abstract: An improved system and method for applying adhesive to a secondary backing fabric for adhesively laminating the secondary backing to a carpet. A secondary backing fabric is conveyed along a path at a predetermined speed, while an adhesive is deposited onto the surface of a casting roller rotating in a direction opposite to the direction of movement of the secondary backing fabric. A doctoring means spaced a predetermined distance from the surface of the casting roller doctors the adhesive into a layer of predetermined thickness on the casting roller. The secondary backing fabric is then brought into contact with a portion of the adhesive-coated casting roller so that a layer of adhesive is transferred onto the backing fabric.

Abstract: A process for effecting the high speed coating (as herein defined) of both sides of a lightweight paper sheet (as herein defined) with coatings of low dry coatweight (as herein defined), while maintaining good coating pattern and control over the degree of curl in the sheet when dried, comprising the steps of:moving an endless transfer surface sequentially through first, second and third stations,at first station, forming on said transfer surface a smooth continuous film of a first coating mix having a predetermined fluid content and rheology,at the second station, bringing a first side of said paper sheet into contact with said transfer surface and simultaneously subjecting the sheet to pressure against said transfer surface without substantial sheet distortion, so as to promote substantially complete absorption by the sheet of the solvent or dispersion medium of the first coating mix while in engagement with the transfer surface and prior to passage of the sheet and transfer surface through the third statio

Abstract: Apparatus for forming a web of predetermined thickness from a molten material. The apparatus includes a rotatable cylindrical drum having a cylindrical gel forming surface thereon, and first and second cylindrical support surfaces thereon, the first and second cylindrical support surfaces being spacedly positioned along the axis of rotation of the drum on opposite sides of the gel forming surface and being concentric with the cylindrical gel forming surface. A support assembly is provided for riding on the first and second cylindrical support surfaces as the drum rotates, and a molten material supply box is supported by the support assembly for depositing molten material onto the rotatable cylindrical drum as the drum is rotated.

Abstract: A device for coating continuous webs with regulable coating strength by means of a doctor rod that rests against the coated side of the web, that is mounted in a doctor bed, and that can be elastically forced with regulable pressure against the web being coated. The doctor rod is a doctor batten that moves with little friction along at least one overflow-side slide face of a rigid doctor bed. The face of the doctor batten toward the web that is being coated is rectangular and demarcates in conjunction with the web a narrowing coating-material application gap with a geometry that depends on the degree of contact pressure. The upper edge of the face constitutes a straight and sharp stripping edge. The face and stripping edge of the doctor batten are flexible. Its face is highly resistant to wear. The contact pressure is exerted by an inflatable means of exerting pressure positioned between the batten and the bed.

Abstract: A device for positioning tires comprises a station to which the tires are separately conveyed while laid flat on a driven conveyor and at which the tires are aligned with respect to a plane set at right angles to the conveyor by means of adjustable or displaceable stops and are thereupon exposed to a treatment, processing or measuring operation. So that the tire in question may be placed in rotation without a complementary driving system, the station has arranged thereat at least one liftable and lowerable support member eccentrically positioned with respect to the aligned tire, which may be placed in contact with the downwardly directed tire sidewall by being lifted, in order to tilt the tire to one side. The tire placed in the tilted position and secured against being moved away rests on the conveyor in the area of its lowest point and is placed in rotation by said conveyor.

Abstract: For use in a doctor blade holder or the like, a self-compensating support element consisting of a hollow elongated flexible tube filled, except for the end regions thereof, with an incompressible liquid. Pliable inserts are received in the tube end regions, and tubular metal sleeves are swaged onto the tube end regions and the inserts received therein. The tube end regions are thus tightly clamped between the inserts and the thus swaged sleeves to seal against the escape of liquid from the tube ends.

Abstract: A developing apparatus is constructed so that a first rugged surface portion is formed on that portion of the surface of an elastic blade which faces and is pressed against a developing roller, thereby reducing the conveying force to carry the developing agent in contact with the first rugged surface portion under the pressure of the elastic blade. In this way, the layer of the developing agent flowing to the contact point between the developing roller and the elastic blade is gradually thinned to form a uniformly thin layer of developing agent on the surface of the developing roller.

Abstract: A coater includes a gravuer roll rotatably mounted in a fountain of coating material. A doctor blade engages the roll and doctors material from the surface. A curved predoctor deflector opens upstream of the material and has an inclined upper edge at about the level of the material to form a wedge-shaped gap forcing material into the roll. The deflector bottom is spaced from the fountain bottom to define a return path. A curved deflector at the doctor blade collects doctored material from the doctor blade and returns it to the return path. The predoctor generates a reverse material flow in the fountain creating a pressure at the return path to create a smooth circulation of coating material and essentially constant level in the said container.

Abstract: An arrangement for application of liquids, such as a coating unit for a printing press, with a liquid supply above the metering gap formed between a metering roller and an applicator roller interacting therewith, a partition designed to damp vibrations dividing the liquid supply along the length of the rollers in order to compensate for turbulence, resonance and irregular air occlusions as far as the metering gap and to prepare uniform quantities of liquid.

Abstract: A method of manufacturing an electrode for a fuel cell comprises placing a coating roller opposing a feeding roller with a space through which an electrode substrate is passed, placing a doctor roller with respect to the coating roller so as to keep a space which is adjustable, arranging a paste reservoir above the doctor roller and the coating roller so that paste flows to the space between the doctor roller and the coating roller, rotating the feeding roller in a specified direction while the coating roller is rotated in the same direction as the feeding roller to transfer the paste on the electrode substrate.

Abstract: In spreading glue onto blanks for the manufacture of packs, it is necessary to ensure that the metered amounts of glue spread onto the glue spots are neither too large nor too small. There is therefore a need to provide a glue transfer which is precise in respect of amount of glue, glue pattern and relative positioning. For this purpose, glueing rolls, glueing rollers and glueing segments are used, which in the region of the glue transfer are provided with shallow depressions or recesses, which accommodate limited amounts of glue for transfer onto the blank.

Abstract: An apparatus and method for developing an electrostatic latent image on an imaging member wherein a development nip is formed between a rotatably mounted cylindrical developer roll and the imaging member. The nip is initially supplied with a wedge shaped layer of developer material to develop the electrostatic latent image on the imaging member. Periodically at stated intervals the developer material is collected from the developer roll and development nip and the same measured amount of developer material is resupplied to the development nip.

Abstract: Stacks of paper sheets are transported at a level above a heated paste tank and their lower edge faces are contacted by the upper portion of the peripheral surface of a driven wheel-shaped applicator whose lower portion dips into the supply of paste in the tank and an intermediate portion of which is located above the upper level of the supply of paste and upstream of the upper portion. The intermediate portion of the peripheral surface receives a mixture of paste and air from a spray nozzle which, in turn, receives the mixture from a conduit containing a mixer and a pump and having an intake end immersed in the supply of paste in the tank. The pump draws air or another gas into the conduit by way of a pipe upstream of the mixer, and the latter converts the supplied paste and gaseous fluid into a foam which is delivered to the orifice of the nozzle.

Abstract: A photocopying machine developing apparatus is described in which an adjustable doctor blade is disposed adjacent a shell surrounding a magnetic roller. The doctor blade is guided in a U-shaped slideway with respect to the shell and is displaceable in the radial direction by contact with adjusting screws. The doctor blade is pressed against the adjusting screws by tension springs.

Abstract: An apparatus for applying glue to a wallpaper which is passed therethrough along a drive direction includes a frame which is adapted to hold glue, a glue application roller mounted on the frame, a rerouting roller in parallel with, and downstream of the application roller, as seen along the drive direction, and adapted to be in operative engagement with the glue application roller through the wallpaper, and a drive motor in direct driving connection with the rerouting roller.

Abstract: A device for developing an electrostatic latent image formed on an imaging surface using electrically insulating and magnetically attractable toner particles includes a developing sleeve and a doctor blade for forming a film of toner particles on the sleeve. In one form, the doctor blade has an end surface which is inclined at an angle in the range 15.degree..+-.15.degree. with respect to the tangential plane defined at the point of contact where the tip end of the doctor blade meets with the sleeve surface, and this angle converges in the direction of the sleeve's direction of movement.

Abstract: Apparatus for supporting a coater blade as used in paper forming. The apparatus comprising a blade support, clamping means for locating the blade against the blade support, and a profile support engaging the coater blade. The profile support is an elongate plate-like member which is clamped adjacent one edge and whose other edge engages the coater blade. Adjustment means is provided to adjust the position of engagement of the profile support with the blade in a direction tangential to the plane of the coater blade. The adjustment being provided by a row of screws whose heads co-operate with the profile support and which engage threadingly with a mounting means for the profile support. Spring means acts in opposition to the screws.

Abstract: Apparatus for adjusting the position of a movable doctor blade structure. The apparatus includes a block member that presents an inclined surface to a contact made with the doctor blade structure. The block member is moved relative to the contact made with the doctor blade structure to alter the position of the doctor blade structure by rotation of a screw that is captively held in a support means and is threaded to the block member.

Abstract: A device for unilaterally clamping an elastic doctor blade into a cutting beam. The tension of the blade is varied in relation to a web of material that is to be coated and that runs over a mating roll. The doctor blade rests against the web of material along a doctor line parallel to the cutting beam. The blade is rigidly supported in its midsection along a line of support that is in fixed position with respect to the web of material parallel to the doctor line. The lower edge of the doctor blade can be displaced with respect to the plane of the doctor line and the line of support. The doctor blade is positioned in a longitudinal recess in the cutting beam. The doctor blade is clamped into the longitudinal recess against an elastic resistance in the cutting beam by means of an elastic pressure-medium hose. The lower edge of the doctor blade is guided toward the line of support when displaced out of the plane of the doctor line and the line of support.

Abstract: An apparatus in which a latent image recorded on an image receiving member is developed with marking particles. A developer roller transports the marking particles into the development zone. A blade having at least one aperture therein through which the marking particles pass has the free end portion thereof in contact with the developer roller. In this way, the thickness of the layer of marking particles on the developer roller is controlled.

Abstract: Novel coating apparatus and method whereby a coating transfer roll is utilized as part of the coating composition reservoir and kinetic energy from said roll is a principal and effective means to keep the coating composition effectively agitated.

Abstract: A liquid film as applied to a transfer drum or planar surface by the textural force of a member in a trough which contacts one wall of the trough to prevent entrainment of air into the body by the member, e.g. a roller, while a wiper or the like engages the surface to prevent entrainment of air by the latter into the trough.