Apparatus for continuous heat sealing of plastics sheeting

    公开(公告)号:GB1042415A

    公开(公告)日:1966-09-14

    申请号:GB1950864

    申请日:1964-05-11

    Applicant: BASF AG

    Abstract: 1,042,415. Closing filled bags. BADISCHE ANILIN- & SODA-FABRIK A.G. May 11, 1964, No. 19508/64. Addition to 980,085. Heading B8C. [Also in Division B5] The apparatus for heat sealing plastics sheeting of the parent Specification is modified in that the jet used for the hot air treatment of the sealing zone of the sheeting 8 comprises a rectangular jet surface 5 in which the jet openings 6 comprise a plurality of bores evenly distributed over the whole of the surface 5 which is bounded by walls on its edges so that the walls 2, 4, 7 perpendicular to the surface 5 extend beyond it in the direction of the sealing zone. The hot air is supplied through a pipe 10 and after passing through the openings 6 collects in a space 9. As shown in Fig. 3, the sheeting 8 passes between a pair of opposed hot air jets 11 and then between two motor-driven rollers 12 having a toothed profile 15 and which are preferably made of aluminium. To solidify the seal, the sheeting 8 passes between a pair of opposed cold air jets 13 supplied with cold air through a pipe 14.

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