GB1038035A - Improvements in tubular bodies - Google Patents

Abstract

1,038,035. Making tubes. M. M. YOUNG. June 7, 1963 [June 8, 1962; Sept. 18, 1962], No. 22901/63. Heading F2P. [Also in Divisions B5 and B8] A machine 10 for manufacturing laminated tubular bodies comprises two rolls 12, 14 carrying a strip 16 of waterproof material, for example aluminium foil, and a strip 18 of paper, cardboard or chipboard respectively (Fig. 1). Adhesive is applied to the strip 16 by an applicator 22 and the strip 18 is fed through a heater 20 to be dried. The strips are then guided and rolled together by means 28, 24, the strip 16 being subsequently folded about the strip 18 by a folder 30. The guide 28 also dispenses a tear string 100 being a narrow flat ribbon of nylon between the two layers. The laminate 32 so formed is then passed over a second adhesive applicator 62 and thereafter the laminate is guided and affixed to a second laminate 54, fabricated in the same manner as laminate 32 but having no tear string. The second laminate comprises a waterproof layer 40 and a paper or the like layer 38. The longitudinal edges of the two laminates 32, 54 are staggered with respect to each other such that, on the passage of the laminates through a folder 70 which includes a mandrel, the longitudinal edges of the laminates are brought into abutment, the joint of one laminate being staggered with respect to the joint in the other. Adhesive is applied to the edge faces of the laminates in the folder 70 (Fig. 4, not shown). Pressure is then applied to the formed tubular body by member 80. The detection of a mark on the tubular body by an electric eye 82 actuates a cutter 84 which is of a type which reciprocates at the same velocity as the tubular body to detach a stick of container bodies 86. The mark is provided between printed labels on the strip 40. The stick of container bodies may then be cut into individual containers by a plurality of rotating knives mounted on a common shaft (Fig. 8, not shown). The tubular body may be fabricated from three or more layers of laminates whence the inner and outer layers are fabricated as above, the middle layers having their exposed edge surfaces only covered by waterproof layers (Fig. 6, not shown). The waterproof layer is of the order of 0À001 to 0À002 inches thick and the paper or the like strip several times thicker. The laminates may be formed by passing a substrate strip of paper or the like material through an evacuated chamber to be coated with a metal film such as a film of aluminium.