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    • 3. 发明专利
    • Improvements in collapsible paper and like packages and a method of making them
    • GB731266A
    • 1955-06-08
    • GB990852
    • 1952-04-21
    • KLEIN ERNSTHANS KLEINWERNER KLEIN
    • B31B17/00B31B105/00B31B150/00B31B160/20B65D5/00
    • 731,266. Boxes; paper bags. KLEIN, E., KLEIN, H., and KLEIN, W., [trading as BISCHOF & KLEIN]. April 21, 1952 [April 20, 1951; March 18, 1952], No. 9908/52. Classes 18 and 94 (2). A blank of paper or like material has a reinforcement glued thereto along its longitudinal edges and is folded to form a tube of circular, elliptical or rectangular section. A closure for either end of the tube, of a much stiffer material than the blank, is provided. In the form shown in Fig. 12, a tube 1 of cellulose sheeting is provided with reinforcing strips 2, 3 and separate end closures comprising a part 14 inset from the end of the tube and flaps 15 embracing the reinforced ends of the tube. The reinforcing strips may be simple strips glued to the blank, or they may enclose a strong flexible insert, for example, of cord. The reinforcing strips may be provided with flaps 40-42, Fig. 29, which are folded and glued to form an end closure, and an additional traylike cover 47 may be provided, the raised edges 48 being glued to the end closing flaps. In the embodiment of Fig. 15 the container is closed by flaps 21, 22 on the reinforcing strips, the flaps having cut-out portions so that they may be tucked under each other to form a closure flush with the end of the tube. The blank may be taken from a supply roll, and the reinforcing strips glued thereto and cut to form flaps if required, in a continuous process. Alternatively, the tube may be formed first and the reinforcing strips fitted in the opened-out ends.