Patent GB-765919-A (GB)
Title: Improvements in or relating to ream wrapping machines
IPC: B65B25/14
Filed: 1954-08-27
Abstract: 765,919. Wrapping-machines. BOULY, H. G. (Nekoosa-Edwards Paper Co.). Aug. 27, 1954, No. 24989/54. Class 94(1). [Also in Group XVI] A ream wrapping machine comprising a table for supporting a ream to be wrapped, includes means for feeding wrapping paper transversely of the table and for cutting the paper thus fed to wrapper lengths, a pusher member adapted to push the ream along the table into engagement with the wrapper so that the wrapper folds around the advancing end of the ream, conveyer means for moving the ream together with the wrapper engaged thereby along the table, and pivoted folding means disposed beneath the table and movable upwardly, through the table so as to engage the trailing end of the wrapper and fold the trailing end over the rear end, and into engagement with the top of, the ream. A supporting table 12, Figs. 3 and 3a, extends along the machine. The reams are placed on a side extension 13, Fig. 4, and pushed onto the table 12 into engagement with a stop 14. Compressed air supplied through holes 19 in the table 12 and extension 13 assist this operation. Paper from a roll 21, Fig. 3, passes through a housing, Fig. 8, where it is festooned over a number of upper and lower rollers, the lower rollers 113 being mounted in means 29 capable of moving downwards. The paper is drawn into the housing by rollers 26, 27 until the means 29 has moved downwards to a position where it actuates a switch 90 to stop the rollers 26, 27. Rollers 32, 33 draw the paper from the housing and deliver it downwardly through a shoot 15, Fig. 3, to a slit in the table 12 and thence to a shoot 16 below the table. Associated with the shoot 16 is a vertically adjustable switch 35 which, when contacted by the descending paper, stops the rollers 32, 33. A bar 17 is now automatically moved forwards to push the reams against the paper 20 extending through the table 12, and as it does so a knife 34, Fig. 8, cuts the paper from the main supply. The reams 18 and paper 20 are now as shown in Fig. 30a. The bar 17 continues its forward movement to push the reams 18 below means causing the upper part of the wrapper paper to be folded downwards as in Fig. 30b. Mounted on a pair of spaced, endless, and continually rotating chains 36 extending longitudinally of the table 12, Figs. 3 and 3a, are a number of clamps 39 so arranged that during the first part of the forward movement of the bar 17 the ream 18 and its wrapping 20 is gripped by one of said clamps and pulled along the table to a trailing end folding station where it is released by the said clamp 39 so that it remains stationary. As the ream is pulled to this position a limit switch causes a number of folding arms 335, Fig. 21, pivotally beneath the table, to move upwardly through apertures to engage the trailing end of the wrapper 20. Upward movement of these arms cause the inner trailing ends of the wrapper to contact a glue roller 340 before causing the wrapper to fold around the ream and into engagement with the wrapper end already on the top of the ream. The ream and wrapper are now as in Fig. 30c. At the same time, moving fingers 337, following the arms 335, smooth the end of the wrapper against the trailing end of the ream. The folding arms 335 at the end of their folding cycle engage and close a limit switch effecting engagement of a heated pressure pad 343 with the glued seam of the wrapper until the seam is sealed. Continued movement of the clamp 39 along the table 12 trips a further limit switch to effect the return of the end folding arms 335 and the raising of the pressure pad 343. Before the reams were halted at said trailing end folding station brushes 410 are caused to sweep against the direction of movement of the reams to tuck the overlapping front edge of the wrapper inwardly. The next succeeding clamp 39 to move along the table 12 now engages the trailing end of the ream 18 and pushes it along the table 12. During this movement the ream trips further limit switches to cause the brushes 410 to return to their original positions and in doing so they tuck in the rear overlapping edges of the wrapper. The ream and wrapper is now as in Fig. 30d. The ram 39 then continues to push the ream along the table past ploughs 459, Fig. 4, folding the upper flaps downwardly, Fig. 30e, past glue rollers 469 acting on the lower flap, past ploughs 471, Fig. 4a (not shown) folding the lower flaps upwardly into engagement with the upper flaps, Fig. 30f, and past presser and heating plates 483, 484, Fig. 4a (not shown) pressing and folding side flaps of the wrapper together and setting with glue by heat. Fixing labels. As the packaged ream leaves the heating plate 484 the clamp 39 travels upwardly with the chains 37 and leaves the ring. Prior to leaving the clamp 39, however, the ream is pushed along a moistener roll 540 into engagement with the limit switch to move the moistener roll 540 away from the ream and cause a labelling device to move inwardly, to wipe a label on the moistened edge of the package, Fig. 30g. Specification 765,918 [Group XV], is referred to.