Patent GB-1138175-A (GB)
Title: Improvements in packaging machines
Inventor: BARRETT JOHN
IPC: B65B11/12
Filed: 1966-07-11
Abstract: 1,138,175. Wrapping-machines. FORGROVE MACHINERY CO. Ltd. 5 Sept., 1967 [11 July, 1966], No. 30989/66. Heading B8C. [Also in Division B2] A packaging machine of the kind in which a wrapper is tubed around an article and tucks are formed in each free end of the wrapper to leave upper and lower closure flaps or tails, a folding box folding and adhesively securing the tails of the wrapper against the ends of the article, and the folding mechanism being adjustable for articles of different sizes, comprises means for effecting simultaneous movement of side members and folders laterally towards or away from the centre line of the box to equal extents, means for effecting equal and simultaneous vertical adjustment of the folders and of daubing units with respect to the side members, means for effecting independent simultaneous lateral movement of the daubing units towards or away from the centre line of the box to equal extents, and means for effecting equal and simultaneous longitudinal adjustment of the daubing units with respect to the side members. The wrapping process, Figs. 1-7 (not shown), is known, and comprises lifting each article in succession on an elevator, each article carrying a wrapper (21) with it, between walls (22, 23) which fold the wrapper over the article. Reciprocating folders then advance to fold one depending portion of the wrapper beneath the article and form two rear tucks. The article is now advanced intermittently by pushers 35 through the folding box, Fig. 8, on spaced baseplates 30 which form the side members and which fold up the leading depending portion of the wrapper, and folders 31 make the forward tucks so that the wrapper now has top and bottom tails 27, 28. Edges 32A of folders 32 fold up the bottom tails 28 and glue is then applied by daubing units 49 to the stationary undersurfaces of tails 27 which are subsequently turned down by folders 33. Finally, the ends of tails 27 enter diagonal slots (29), Figs. 7 and 9 (not shown), in heated areas of base-plates 30 and are thereby folded and pressed under the article. The articles are held down by pressure bars 34, Fig. 4 (not shown), until they are moved on to a conveyer (not shown) which has further pressure rolls to ensure that the glue sets before the packages are finally discharged. The pushers 35 are horizontally reciprocable, and are lifted over the articles on the return stroke by links 40. The base-plates 30, which carry the folders 31, 32, 33, pressure bars 34, and also side guides 92, may be moved laterally by hand wheel 48 acting on screw-threaded shafts 44 in order to accommodate articles of different lengths. The folders 32, 33, pressure bars 34 and daubing units 49 are similarly vertically adjustable by hand wheel 70, the shaft 44 being mounted with these elements as a unit and moving with them. The daubing units 49 may be moved, relative to the rest of the unit, laterally by hand wheel 56, and longitudinally by hand wheel 71. The folders 31 are not adjustable, but may be replaced by elements of different sizes for use with articles of different dimensions. The operation of daubers 75 is controlled by a cam 79 working linkage 82-89 through a bell-crank 81, which causes three circular surfaces 76 to apply spots of glue to the upper tails on each side of the wrapper.