摘要:
An apparatus transfers a threading strip and/or a material web can from a pick-up area into a transfer area along a web travel path for production and/or processing/of the strip and/or web. The device includes a carrier for moving the strip and/or web along the web travel path through the machine at a carrier speed. The device also includes at least one pick-up unit for transferring the strip and/or web from the pick-up area to the transfer area at relocation speed that is lower than the carrier speed.
摘要:
Process and apparatus for transferring a traveling material web into a target region. The process includes positioning at least two cutting mechanisms at one of a same and different width positions between web edges of a traveling material web. The at least two cutting mechanisms are movable relative to the traveling material web in a plane approximately parallel to the material web. The process also includes cutting the traveling material web at the one of the same and different width positions, thereby forming at least one resulting cut that extends approximately parallel to a web travel direction, and forming a substantially pointed beginning of a transfer strip by moving at least one of the at least two cutting mechanisms in a direction toward one of the web edges from its respective width position. In this manner, the resulting cuts of the at least two cutting mechanisms occur at one of a same and a substantially close proximity to a same width position. The apparatus includes at least two cutting mechanisms which are movable relative to the traveling material web in a plane approximately parallel to traveling material web, and the at least two cutting mechanisms are positioned to cut a transfer strip that extends approximately parallel to a web travel direction. The at least two cutting mechanisms are positionable at one of a same and different width positions between web edges of the traveling material web to produce at least one resulting cut in the traveling material web, and at least one of the at least two cutting mechanisms is movable toward an edge of the traveling web to form a pointed beginning of a transfer strip. In this manner, the resulting cuts of the at least two cutting mechanisms occur at one of a same and a substantially close proximity to a same width position.
摘要:
Process and apparatus for winding a running material web, in particular a paper or cardboard web, in which the running material web is wound consecutively on several winding cores, in particular reel spools. At least one cut is made preferably running parallel to the web edge of the running material web and in the web travel direction of the running material web. After the started at least one cut has run through the nip formed by the winding roll and the new winding core, the at least one formed transfer strip which is incorporated in the running material web is detached from the outer circumferential area of the winding roll by at least one directed high-energy air jet that is generated briefly by at least one separator device and simultaneously cuts through. Subsequently, the at least one now detached transfer strip is transferred onto, and preferably applied to, the outer circumferential area of the new winding core by at least one first blower device, in particular a blower shoe.
摘要:
A method of application of a liquid or pasty medium onto a moving material web consisting, in particular, of paper or cardboard, in which a direct application (2) of a liquid or pasty medium (4) onto one side of a moving material web (1) and a contactless deflection (3) of the moving material web along a curved path of motion ensues, the side of the moving material web to be provided with the liquid or pasty medium passing through a concave curvature and the direct application (2) of the liquid or pasty medium ensuing directly ahead of the deflection (3) or during the deflection as a free jet along a contactlessly guided section of the moving material web. Additionally, an apparatus for implementing the method is described.
摘要:
A doctor device, notably for machines used to coat paper or cardboard, with a relatively bendable, flexible doctor element fitted in or on a separate holder. At least along its length in the holder, the device features a convex crowning of its working surface about its longitudinal axis.
摘要:
A doctor holder for a surface coating device or a web coating device has a guide body with a guide path channel through it. A leaf spring like doctor strip is advanced along the length of the channel and across the width of the web being coated. The doctor strip has a row of cutouts in it for enabling it to be advanced through the guide body. One of various forms of guide elements advance the doctor strip. The guide elements may be projections from an endless chain, or may be teeth of a sprocket wheel, or may be individual separate guide elements like balls and the guide elements extend into the cutouts and then into a guide groove in the guide body. The doctor strip is wound onto a reel after leaving the guide body. The guide element balls, or the like, are installed at the beginning of the guide path and are removed e.g. by an air blast, at the end of that path.
摘要:
A doctor blade includes at least one row of openings extending across at least 10% of the blade width in an area representing the actual working width of the blade. The openings begin at a distance between 3 and 35 mm from the working edge of the blade. The openings may be formed as perforations, slots, or notches.
摘要:
A hollow roll featuring a layer of permanent magnets along axial sections of the roll is provided. Pole carriers having permanent magnets are arranged opposite the layer of permanent magnets on the roll. The pole carriers are supported on a core carrier, preferably by means of hydraulic or pneumatic thrust elements, or servomotors. The polarity is arranged such that like poles of the magnets oppose one another. The pole carriers are arranged in an axial row, and are movable in guideways while supported by servoelements. The servoelements are preferably activated hydraulically or pneumatically.
摘要:
The invention relates to an element for forming a leading end of a web from a running material web, especially a paper or board web, having a certain width (B). The invention comprises an element which has a smaller width (BM) that the width (B) of the material web, and in that the element is embodied in such a way that a new leading end of a web is formed at the latest after said element as been introduced into a nip formed by a winding cylinder and the winding core, and is partially covered by the material web. The invention also relates to a method for forming a leading end of a web from a running web material web, especially a paper or board web, applied to a winding core, whereby at least one element is used according to the invention.
摘要翻译:本发明涉及一种用于从具有一定宽度(B)的运行材料纤维网(特别是纸或纸板)形成幅材的前端的元件。 本发明包括具有较小宽度(B SUB M)的元件,其宽度(B)为材料幅材的宽度(B),并且该元件以如下方式实施:使得新的前端 在所述元件被引入由缠绕圆筒和卷芯形成的辊隙中之后,最后形成网,并且被材料网部分地覆盖。 本发明还涉及一种用于从施加到卷芯上的流动纤维网材料网,特别是纸或纸板网形成幅材的前端的方法,由此根据本发明使用至少一个元件。
摘要:
Process and apparatus for cutting a running material web in which the material web is wound onto several winding cores in succession, such that winding of the material web onto a new winding core begins after a predetermined diameter has been attained in a wound roll formed on an old winding core. The process includes moving the new winding core between a winding roll and the wound roll, such that the material web is fed onto the wound roll from the winding roll. The process further includes forming a nip between the new winding core and the winding roll, positioning at least one cutting device one of in a region between the wound roll and the nip and in a region upstream of the winding roll relative to a web run direction, and moving the at least one cutting device relative to the material web in a plane substantially parallel to the material web. In this manner, the running material web can be completely cut. The apparatus includes at least one cutting device adapted to completely cut the material web, and the at least one cutting device can be mounted for movement relative to the material web in a plane substantially parallel to the material web.