GB876287A - Band sealing device - Google Patents

Abstract

876,287. Applying heat-sealed bands to wrappers. ST. REGIS PAPER CO. June 10, 1960, No. 20560/60. Class 73. machine (not shown). As shown in Fig. 2 the heating shoes 46 are screw-threadedly adjustable both with respect to each other and to the frame members 7. As shown in Fig. 1 the band 26 does not pass between the heating shoes 46 but over a semicylindrical heating assembly 10 which is provided in addition to the shoes 46 and is used when the whole width of the band 26 is required to be adhesively secured to the wrapper material. Instead of the shoes 46, a heating assembly may be provided similar to the assembly 10 but having spaced heating shoes 66, 68 Fig. 5 separated by an unheated spacer block 67 so that the lateral edges only of the band 26<SP>1</SP> are heated and made adhesive. In another modification Figs. 6-8 (not shown) a similar heating assembly is provided but the heating shoes and a plurality of spacer blocks are slidably mounted on bars and are independently A band sealing machine comprises a frame with spaced frame members 7 Fig. 1 pivotally mounted at 5 on a fixed support 3 and carrying a pressure roll 35 and a heating shoe assembly comprising spaced shoes 46 Fig. 2 adapted to heat and render adhesive the lateral edge portions of a band 26 of web material 26 drawn from a roll 25, the band then passing around the pressure roll 35 which together with the frame swings about the pivotal mounting 5 to form a nip with a roll 32 of wrapper material to unite under pressure the edge portions of the band 26 to the wrapper material 32. The composite web 40 is carried over a guide roll 41 over which it is drawn by a wrapping adjustable on the bars.