Patent GB-890291-A (GB)
Title: Apparatus for closing articles such as cartons or the like
IPC: B65B51/06
Filed: 1958-06-06
Abstract: 890,291. Apparatus for applying adhesive tape. BEIERSDORF & CO. A.G., P. June 6, 1958 [June 6, 1957], No. 18183/58. Class 73 Apparatus for closing articles, such as cartons, by adhesive strip comprises means actuated by the article to control feed of the strip and to press it on to the article, a feeler actuated by the article independent of the press-on means to release means for severing the strip, the severing means having a first lock actuated by the press-on means and a second lock actuated by the feeler. The mechanism is supported on a web 9 dependant perpendicularly below a cover plate 2 along which the carton is slid to contact successively a plate 31, a press-on roller 6 and a feeler roller 8. The plate 31 and the rollers 6 and 8 are carried respectively on levers 28, 5 and 7 which are pivoted on the web 9 on shafts 27, 17 and 39 and all of which protrude above the plate 2 through a slot 3 parallel to the web. The adhesive strip 12 runs from a reel 12 by way of guide rollers 16 and 30, passing around a one-way tensioning roller 20 on the lever 5 and up to the plate 31, where its cut end is held by a coiled wire roller 34 (see Fig. 7), with its adhesive face towards the advancing carton. The lever 28 carrying the plate 31 is coupled by way of its shaft 27 and a linkage 36- 25 with a two-armed lever 21 fixed on the shaft 17 of the press-on lever. A shaft 48 carries a radial arm 50, a cocking arm 51 and an arm 52 to which is fixed a spring 14 which operates the severing means. A pin 26 on the lever 21 holds the cocking arm 51 counter-rotated against the spring 14 and constitutes the first lock. A knife 9 with protective rollers 55 (see Fig. 4), is mounted on a plate 54 which pivots at 56 on a support 53 on the web 9. A slot 59 in the plate 54 receives the arm 50 and, to constitute the second lock, a cocking notch 54a co-operates with a notch 42a in a lever 42 fixed on the feeler lever shaft 39. Having acquired the end of the strip from the support 31 the carton contacts the roller 6 which rotates on its lever 5 against an adjustably tensioned spring 23. The roller 6 first rises up the advanced face of the carton to apply the strip thereto and then falls to apply it to the underside. The support 31 is locked to the lever 5 and falls therewith whilst rotation of the latter causes the roller 20 to draw off more tape. When the carton contacts the feeler roller 8 the lever 7 rotates the lever 42 freeing the notch 54a from the notch 42a and the knife 58, impelled by the spring 14 by way of the arm 50 and plate 54, severs the tensed strip. Once the rear end of the carton has passed over both the rollers the springs cause the plate and rollers to rise to their initial positions, the arm 51 rotating to lock the knife-plate. Owing to lost motion between a pin 37 and an aperture 38 the pressing roller 6 regains its operative position slightly after the plate 31 so that the strip on the latter does not foul the roller. The extent of movement of the feeler lever before release of the second lock is adjustable by means of a screw 43 which clamps the lever 42 at a selected position in a notch 45 in a plate 41 fixed on the shaft 39 of the feeler lever 7.