用于制造具有开窗防伪线的防伪纸的方法和装置

文档序号:538352 发布日期:2021-06-01 浏览:30次 >En<

阅读说明:本技术 用于制造具有开窗防伪线的防伪纸的方法和装置 (Method and device for producing security paper with windowed security thread ) 是由 A.埃格纳 A.哈内尔特 A.坦特施尔 A.德雷克斯勒 M.普勒格 于 2019-10-15 设计创作,主要内容包括:本发明涉及一种圆网造纸机(10)的圆筒筛网(12),所述圆网造纸机用于制造具有部分地嵌入的开窗防伪线(22)的防伪纸(42A、42B),其中,在造纸过程中,圆筒筛网(12)从纸浆池(16)汲取形式为纤维-水-悬浮液(14)的纸料,并且其中,圆筒筛网(12)包含具有周向(U)和与该周向垂直的横向(Q)的制造网套(30),该制造网套沿周向(U)配设有多个突起的线窗元件(34),在造纸过程中,所述开窗防伪线(22)置放在所述线窗元件上,以便局部地抑制纤维-水-悬浮液(14)的积聚从而产生线窗(40)。按照本发明在此规定,所述线窗元件(34)布置为具有沿横向(Q)的偏移(36),该偏移沿周向是周期性的,其中,圆筒筛网周长R-U是偏移周期P的整数倍。本发明还包括一种对应的用于制造防伪纸的方法。(The invention relates to a cylinder screen (12) of a cylinder paper machine (10) for producing security papers (42A, 42B) having partially embedded security threads (22), wherein during the production of the paper, the cylinder screen is used for producing security papersThe screen (12) draws stock in the form of a fibre-water-suspension (14) from the pulp basin (16), and wherein the cylindrical screen (12) comprises a manufacturing screen (30) having a circumferential direction (U) and a transverse direction (Q) perpendicular to the circumferential direction, which manufacturing screen is provided with a plurality of protruding thread window elements (34) along the circumferential direction (U) on which the windowed thread (22) is placed during the papermaking process in order to locally inhibit the accumulation of the fibre-water-suspension (14) so as to produce thread windows (40). According to the invention, the wire window element (34) is arranged with an offset (36) in the transverse direction (Q), which is periodic in the circumferential direction, wherein the circumference R of the cylindrical screen is U Is an integer multiple of the offset period P. The invention also relates to a corresponding method for producing security paper.)

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