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    • 4. 发明公开
    • Apparatus for making window patches
    • Vorrichtung zur Herstellung von durchsichtigen Aufklebern。
    • EP0095890A1
    • 1983-12-07
    • EP83303017.4
    • 1983-05-25
    • F.L. Smithe Machine Company Inc.
    • Helm, Herbert W.
    • B31B1/82B65H5/22
    • B31B50/00B31B50/82
    • A web (14) of patch material is unwound from a reel and conveyed to apparatus (44) for applying adhesive to preselected portions of one surface of the web. Positioned downstream of the adhesive applicator (44) is patch severing apparatus (22) associated with a vacuum roll (18). Positioned between the patch severing apparatus (22) and the adhesive applicator (44) is a vacuum conveyor (52). The vacuum conveyor (52) includes a porous conveying surface (68) having a web receiving end portion (64) and a web discharging end portion (66). A vacuum housing (72) having a passageway (74) connected to a source of reduced pressure is positioned below the porous conveying surface (68). A ported stationary plate (76) is secured to the housing (72) above the vacuum passageway (74). A ported movable plate (80) is adjustably positioned in overlying relation with the stationary plate (76). Each plate has a plurality of suction ports (78) therethrough. The conveyor (54) pulls the web (14) from the adhesive applicator (44) and pushes the web (14) to the patch severing apparatus (22) where window patches (P) are cut from the web. The window patches (P) are transferred onto the surface (20) of the vacuum roll (18) and therefrom onto the cut windows of envelope blanks.
    • 补片材料的网(14)从卷轴展开并传送到设备(44),用于将粘合剂施加到幅材的一个表面的预选部分。 位于粘合剂施加器(44)的下游的是与真空辊(18)相关联的补片切断装置(22)。 位于贴片切断装置(22)和粘贴剂(44)之间的是真空输送器(52)。 真空输送机52包括具有卷筒纸接收端部分64和卷筒纸排出端部66的多孔输送表面68。 具有连接到减压源的通道(74)的真空壳体(72)位于多孔输送表面(68)的下方。 移动的固定板(76)固定在真空通道(74)上方的壳体(72)上。 可移动板(80)可调节地定位成与固定板(76)重叠。 每个板具有穿过其中的多个吸入口(78)。 输送器(54)从粘合剂施用器(44)拉动纤维网(14)并且将幅材(14)推到贴片切割装置(22),其中从纸幅切割窗口贴片(P)。 窗口贴片(P)被转印到真空辊(18)的表面(20)上,并从那里转移到信封毛坯的切割窗口上。