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    Apparatus for coating and/or impregnating substantially planar articles
    82.
    发明授权
    Apparatus for coating and/or impregnating substantially planar articles 失效
    涂装和/或印制主要平面文章的装置

    公开(公告)号：US3635193A

    公开(公告)日：1972-01-18

    申请号：US3635193D

    申请日：1969-12-01

    Applicant: RALPH E STEASE

    Inventor： STEASE RALPH E

    IPC: D21H17/60 ,  D21H23/30 ,  D21H23/46 ,  D21H23/68 ,  B05C11/06 ,  B05C7/02

    CPC classification number: D21H23/68 ,  D21H17/60 ,  D21H23/30 ,  D21H23/46

    Abstract: A method and apparatus particularly adapted for impregnating corrugated paperboard with wax, the percentage wax pickup being variable within limits as desired. In operation, a plurality of boards is vertically positioned side-by-side, but slightly separated one from the other, into separate lines of travel. The group of vertically positioned boards is then passed underneath a free-falling, unrestrained cascade of molten wax at a controlled rate to obtain complete flooding or coating of all exterior board surfaces. The cascade is developed in a plane transverse to the boards'' lines of travel. Such flooding also occurs within the boards'' flutes if the flutes are vertical as the boards pass trough the cascade. A first air knife then directs hot air onto the top edges of the vertical boards to remove excess wax from the exterior faces or liners of the boards, as well as from the boards'' interior if the corrugations or flutes are also vertical. The boards then move through a temperature-controlled conditioning section the section being maintained at an elevated temperature, where impregnation takes place. Thereafter, a second air knife directs air onto the bottom edges of the vertical boards to remove excess wax in the form of beads or drips that may be formed toward the bottom of or at the bottom edge of the board. Finally, cool air is blown up through the vertical boards to set the wax and cool the boards for handling and stacking. Depending on the wax used, the temperature of the molten wax, the temperature of the environment immediately after waxing but prior to cooling, and the throughput speed of the board, the board will be either dry waxed or wet waxed. The wax pickup percentage of the boards is controlled mainly by varying wax temperature and board exposure time in the wax-flooding step. The wax distribution in the board is controlled mainly by varying environment temperature and board exposure time in the conditioning step. Thus, the method and apparatus can be controlled to obtain either dry-waxed or wet-waxed paperboard at a desired wax pickup level.

    Abstract translation: 特别适用于用蜡浸渍瓦楞纸板的方法和装置，所述百分比蜡拾取器根据需要在限度内变化。 在操作中，多个板彼此并排地竖直放置，但是彼此稍微分离成单独的行程。 然后将一组垂直定位的板以受控的速率通过自由落下，无限制的熔融蜡级联，以获得所有外部板表面的完全淹没或涂覆。 级联在横向于板的行进线的平面中开发。 如果板在板级通过级联时垂直，则这种淹没也会发生在板的槽纹内。 然后，第一气刀将热空气引导到垂直板的顶部边缘，以从板的外表面或衬垫以及板的内部除去多余的蜡，如果波纹或凹槽也是垂直的。 然后，板通过温度控制的调节部分，该部分保持在升高的温度，其中发生浸渍。 此后，第二气刀将空气引导到垂直板的底部边缘上，以除去可能朝向底板的底部或底部边缘形成的珠子或滴液形式的多余的蜡。 最后，冷空气通过垂直板吹起，设置蜡并冷却板进行处理和堆放。

    Process for making wet-strength paper and product thereof
    83.
    发明授权
    Process for making wet-strength paper and product thereof 失效
    制作湿度强度纸及其制品的方法

    公开(公告)号：US3556930A

    公开(公告)日：1971-01-19

    申请号：US3556930D

    申请日：1968-02-29

    Applicant: OWENS ILLINOIS INC

    Inventor： SCARVELIS GUS S

    IPC: D21H17/12 ,  D21H17/48 ,  D21H17/50 ,  D21H17/60 ,  D21F11/00

    CPC classification number: D21H17/48 ,  D21H17/12 ,  D21H17/50 ,  D21H17/60

    Abstract: A PAPER WEB CONTAINING 1-20 PRECENT OF A THERMOSETTING RESIN SUCH AS PHENOL OR UREA FORMALDEHYDE AND 0.1-4 PRECENT OF A CHROMIUM COORDINATION COMPLEX OF A FLUOROHYDROCARBON WHICH IS DISSOLVED IN A SOLVENT IS IMMERSED IN A BATH OF MOLTEN WAX. FROM 5-40% OF THE WAX IS PICKED UP ON THE PAPER WEB; THE HEAT OF SAID WAX ALSO HELPS TO CURE THE THERMOSETTING RESIN. THE FLUOROHYDROCARBON IS ADDED TO THE WEB CONTAINING THE RESIN AT ANY STAGE IN THE PAPERMAKING PROCESS PRIOR TO THE WAX IMPREGNATION. THE FLUOROHYDROCARBON ADDITION GENERALLY IMPARTS TO THE PAPER WEB THE ABILITY LIMIT THE WAX PICK-UP AND CONTROLS ITS DISTRIBUTION ON THE PAPER WEB.

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