Abstract:
Blade holder for creping of a web travelling on a rotating cylinder (2) or for doctoring the surface of the cylinder, comprising a blade (3) directed opposite to the travelling direction of the cylinder (2), a blade carrier (41) for the blade, further comprising a pressure ledge (13) extending along the whole length of the blade and arranged to exert a pressure at or adjacent to the upper longitudinal edge of the blade (3) via pivotable pressure arms (15) evenly distributed along the length of the ledge and arranged on the blade carrier (41) to bring said edge to engagement against the cylinder (2). Each pressure arm (15) is arranged to be individually actuated by a pressure means having a double folded membrane (35) for actuation of the pressure arm (15) by means of a pressure medium.
Abstract:
Positive electrodes for lead storage batteries are produced by "forming" the electrodes in an alkaline electrolyte containing an anion which forms a very slightly soluble lead compound. The electrode may also be immersed, prior to forming, in pure water, an aqeuous solution of sodium sulfate, and/or sodium hydroxide.
Abstract:
Application apparatus for the coating of a travelling web (5), comprising a support roll (3) and a predosage roll (7′), said rolls forming a nip between themselves through which the web is brought to travel, further comprising an application device (21) by which sizing agent or coating agent (13) can be transferred onto the web, and means (19) for final evening of material applied onto the web, characterized in that the application device (21) is designed in such a manner that it transfers directly onto the travelling web (5) said material (13) in a certain excess before entering the nip where predosage is provided before the subsequent and final evening of applied material.
Abstract:
A device for the coating of a travelling web (7), preferably a paper web, comprising a back-up element (3), a metering means (9) cooperating therewith and intended for the application onto the web (7) across essentially the full width thereof a coating liquid (13), a coating blade (17) positioned downstream of the metering means (9), and means for feeding the web (9) in the nip between the back-up element (3) and the metering means (9) and between the back-up element (3) and the coating blade (17). The device further comprises at least one edge lubricating means (27) which is positioned adjacent to one edge (43) of the web and upstream of the metering means (9), and which is arranged to deposit along said one edge (43) a string of lubricating liquid at least up to a position cross-wise and inwardly of the web adjacent to the margin of the coating liquid (13) when applied, whereby uneven wear of the coating blade (17) is avoided; and a process for the coating of a travelling web.
Abstract:
An apparatus for coating a travelling web (5), having supply systems (10,15,16;31,33;41;47,49;73) for the supply of coating agent (11) to the web (5), the systems including a metering device (15;31;41;47,49;75;77) extending across the whole width of the web and which by an intermittent contact surface (27,29;37,39;43,45;47;49) provides intermittent engagement with the web (5) or a backing member (3) against which the web subsequently comes to engagement, for the deposition of strands of coating agent (11) on the web (5) or the backing member (3).
Abstract:
An apparatus for coating a travelling web (5), including supply systems (10,15,16;31,33;41;47,49;73) for the supply of coating agent (11) to the web (5), the systems including a metering device (15;31;41;47,49;75;77) extending across the whole width of the web and which by an intermittent contact surface (27,29;37,39;43,45;47;49) provides intermittent engagement with the web (5) or a backing member (3) against which the web subsequently comes to engagement, for the deposition of strands of coating agent (11) on the web (5) or the backing member (3).
Abstract:
A dosing device for the application of a coating mix (6) onto a running web, in particular a paper or paperboard web (1), which device comprises a rod (8) that is supported revolvingly over its entire length in a rod cradle (12), and a pressing device (13) acting on the rod cradle and producing a pressure of the rod onto the web (1) and onto the holding-on device (2, 17, 15) of the web, the rod (8) being provided with a wear resistant surface coating (15) with a hardness of about 10 to about 100 according to Shore A. The invention also relates to methods of using said rod, and to said revolving rod.
Abstract:
A creping doctor device for the scraping off and creping of a running paper web from a rotating cylinder, comprising a holder device arranged to be able to support a continuous, or divided, longitudinally moveable doctor blade, which doctor blade is arranged to have a length that exceeds at least twice the length of said cylinder and is provided with a scraping surface and a contact line and/or contact surface, which contact line and/or contact surface is intended to bear against the jacket surface of said rotating cylinder at a certain linear load, said doctor blade comprising a supporting part and a wear part that is moveable in relation to the supporting part.
Abstract:
A creping doctor device for the scraping off and creping of a running paper web from a rotating cylinder, comprising a holder device arranged to be able to support a continuous, or divided, longitudinally moveable doctor blade, which doctor blade is arranged to have a length that exceeds at least twice the length of said cylinder and is provided with a scraping surface and a contact line and/or contact surface, which contact line and/or contact surface is intended to bear against the jacket surface of said rotating cylinder at a certain linear load, said doctor blade comprising a supporting part and a wear part that is moveable in relation to the supporting part.