公开(公告)号：US4398990A

公开(公告)日：1983-08-16

申请号：US251964

申请日：1981-04-07

申请人： Heinz Kuhni ,  Peter Schwaninger

发明人： Heinz Kuhni ,  Peter Schwaninger

IPC分类号： B31B19/90 ,  B31B70/00 ,  B31B160/10 ,  B32B35/00

CPC分类号： B31B19/00 ,  B31B2219/90 ,  Y10T156/12 ,  Y10T156/1317 ,  Y10T156/1322 ,  Y10T156/1339 ,  Y10T156/1744 ,  Y10T156/1771 ,  Y10T156/1773

摘要： Aluminum laminae are heat-sealed onto the inside of flat-bottomed plastic bags so that, by bending the lamina double after the bag has been cut open to remove part of its contents, the bag can be reclosed. The apparatus for sealing the laminae on can be incorporated in an existing bag-filling installation. An aluminum strip is supplied to a punching device from a supply roll. A punched-out aluminum lamina is placed upon the upper part of a conveyor lever. The lever is rotated through 180.degree. so that the aluminum lamina to be sealed on comes to be positioned between two layers of a web of plastic material fed by rollers. The ends of the lever are preheated by heating elements in order to accelerate the sealing-on operation. The aluminum lamina is heat-sealed onto the inside of the folded web in such a way that the longer edges of the lamina form an angle of about 45.degree. with the flat bottom of the bag. The rate of production of the existing filling installation can be maintained despite incorporation of the sealing-on apparatus.

摘要翻译： 铝板被热密封在平底塑料袋的内部，使得通过在袋被切割打开以后将薄片弯曲两倍以除去其内容物的一部分，袋可以重新闭合。 用于密封薄片的装置可以结合在现有的袋填充装置中。 将铝条从供给辊供给到冲压装置。 一个冲压铝板被放置在输送杆的上部。 杠杆旋转180度，使待密封的铝层位于由辊子供给的塑料材料的两层之间。 杠杆的端部由加热元件预热，以加速密封操作。 铝层被热密封到折叠腹板的内侧，使得层的较长边缘与袋的平坦底部形成约45度的角度。 尽管结合了密封装置，仍可保持现有的灌装设备的生产率。