Abstract:
A friction resistant blade having a protective layer with an increased hardness is provided. A method for producing the friction resistant blade is also provided.
Abstract:
The invention relates to a doctor or coater blade (1) of steel, having a nickel coating comprising abrasion resistant particles, said coating being constituted by an electrolytic nickel layer comprising abrasion resistant particles. The coating preferably comprises at least two electrolytic nickel layers having different composition, and may be formed differently in different sections of the blade. The invention also relates to a continuous process for electrolytic nickel coating in at least one electrolytic cell holding an electrolyte liquid comprising at least one nickel salt, and in at least one of these cells also comprising abrasion resistant particles.
Abstract:
It is an object to obtain a blade 1 with which coating or scraping can satisfactorily be performed and which is able to protect a plate-like member 3 from being broken.A blade having a ceramic plate-like member 3 having an edge 3a and secured to the surface of an elongated metal plate 2 in the leading end portion of the elongated metal plate 2, wherein the blade 1 is deflected by 10 cm or more in the direction of the thickness thereof owning to the deadweight without breakage of the ceramic plate-like member 3 when the blade 1 is supported at two ends thereof which are apart from each other by 1 m or longer in the lengthwise direction thereof.
Abstract:
A coating blade (5) for controlled application and smoothing of a coating composition on a travelling paper web (7) supported by a co-rotary roll (9), said blade (5) comprising a steel strip (13) elongated in a first direction between first and second edge sections, said first edge section engaging the paper web (7) and being provided with an abrasive wear resistant deposit (15) to extend the life of the blade, wherein an intermediate layer (17) positioned between said deposit (15) and said steel strip (13), said layer (17) having a higher resistance to abrasive wear than said deposit (15).
Abstract:
The aim of the invention is to make it possible to vary independently of each other, i.e. better and more freely, the basic parameters in the design of a squeegee used as a flexible-plate doctor blade in a coating-material spreading device. These parameters may include the length of the chamfered surface in contact with the surface to be coated, the resistance to bending strain parallel to the spreading edge of the blade and the resistance to bending strain at right angles to the spreading edge of the blade. This aim is achieved by virtue of the fact that the flexible-blade doctor blade (squeegee) proposed does not have a constant thickness but is made up of two or more different cross-sections with steps parallel to the dosing edge, thus giving the flat sides of the doctor blade a substantially terrace-like structure. The blade may also have grooves parallel to the dosing edge.
Abstract:
A method and apparatus for coating both faces of a moving web, such as a paper web in which the web is fed longitudinally at a speed in excess of 200 meters per minute and a coating material is applied to each face of the web, and is smoothed out by means of two blades, one on each face of the web. The blades are formed with a bevel at the point of contact with the web, the width of this bevel measured in the direction of movement of the web is at most 0.08 centimeters and the angle of the blade with respect to the web is less than 25.degree.. Preferably the blades are urged against the web with a force not exceeding 0.20 kgf. per centimeter width of web.
Abstract:
A coating doctor blade having a chamfered face is produced by the steps of forming into a roll a hardened and tempered metal band blank, edge-grinding the blank in the roll, winding off the blank, planing a chamfer surface on one side surface of the blank by moving the blank, in a single pass in the longitudinal direction of the blank, over a single hard metal bit thereby providing a chamfered surface free from scratches and grooves detrimental to the evenness of a coating spread by the resulting doctor blade, and dividing the so-chamfered blank into doctor blades of suitable lengths.
Abstract:
A system for coating of a donor material onto a laser radiation transparent substrate, the system including a donor material applicator, applying donor material to the laser radiation transparent substrate, a multi-pass precise donor material thickness determiner for providing a desired thickness of the donor material on the laser radiation transparent substrate and including a linearly displaceable blade support, a layer thickness uniformizing blade lockably pivotably mounted onto the linearly displaceable blade support about a pivot axis, the blade having a straight edge and a blade position maintainer operative for maintaining the straight edge at a desired separation distance from the laser radiation transparent substrate, the separation distance being uniform along the straight edge of the layer thickness uniformizing blade.
Abstract:
A blade attachment tool includes a first support member supported by a pressing support portion supporting a blade formed of an elastic member configured to wipe/scrape liquid/solids spreading on an abutment surface by being pressed against the abutment surface and being long in one direction such that the blade is pressed against the abutment surface with a predetermined pressing force, a second support member supported to swing about a swing shaft extending in a longitudinal direction of the blade with respect to the first support member and configured such that a base end side of the blade is attached thereto, and an energizing member configured to apply a reaction force to a friction force that causes the second support member to swing about the swing shaft with respect to the first support member when the blade is pressed against the abutment surface to slide relatively to the abutment surface.