Patent GB-305856-A (GB)
Title: Improvements in wrapping and stamping machines
IPC: B65B11/40
Filed: 1928-03-19
Abstract: 305,856. Fischer, L. March 19, 1928. Packeting by wrapping- up.-A machine for applying outer wrappers and revenue or other stamps to tobacco and other packages comprises means for advancing longitudinally a package and a wrapper, and simultaneously folding the wrapper about an end and the upper and lower sides of the packing leaving unfolded portions projecting from an end and opposite sides thereof, wrapper endfolding mechanism, means for swinging the package to a position for folding the unfolded end of the wrapper, Fig. 2, are fed by a conveyer 3 and rollers into a vertical shoot 5 where the mid-portion lies opposite to a package Y fed from a stack 12 in front of a plunger 9. The plunger 9 is reciprocated to force the package and wrapper through apertures 8 in the shoot into a former 21 which folds the wrapper down on to the broad sides of the package whilst corner folders 22 make the folds a, Fig. 29. The plunger pushes the package past folders 23, which fold up the lower lateral projecting portions b of the wrapper, on to a seat 24 and .against a stop 27. The seat 24 and stop 27 are carried by an arm 25 secured to a rock shaft 26. The shaft is rocked by a sector 90, Fig. 9, which engages a pinion 89 on the shaft and is actuated by a cam to transfer the package between arcuate guide plates 28, which fold down the remaining side portions c of the wrapper, to an inclined end-folding position where it is held by spring-pressed pivoted arms 61, 62, Fig. 12, disposed in slots in the guides 28 and formed with inclined portions 75, 76 which the package engages to open the arms for its passage to a position where it is held between shoulders 65, 66 on the arms. The arm 25 is then retracted to its horizontal position. In the end folding operation, the narrow flaps, d, e, Fig. 30, are first folded down by folders 29, 30, Fig. 17, pivoted on arms 44, 45 and adjustable thereon by set screws 48, 49 against which the folders are pressed by springs 50, 51. The arms 44, 45 are mounted on interconnected shafts 32, 33 which are rotated simultaneously in opposite directions by a link 40 connected by a rod 41 to a cam shaft 43. Immediately afterwards, a similar folder 31 folds down the outer broad end portion. The folders are supported by an upright 35 secured to the main table 1. Mounted on the shaft 26 at 45‹ to the arm 25 is a second transfer member comprising a bracket 79, Fig. 9, and interconnected arms 78 which are thrust outwards by a spring 97 but may be forced inwards by the action of a cam 93 on a roller 96 on an arm 95 secured to one of the arms 78. The cam is loosely mounted on the rock shaft 26 and is rotated continuously by the shaft 43 at a speed substantially that of the shaft 26. When the arm 25 is retracted, the second transfer member is turned down from en upright position beneath the stamping mechanism, the cam 93 permitting the spring 97 to open the arms 78 until teeth 80, 81, 82 thereon are clear of the guide plates 28. On reaching the inclined end-folding position, the cam 93 closes the arms behind the package and simultaneously extensions 98, Fig. 12, on the arms 78 engage rearward extensions 73, 74 on the arms 61, 62 and open these arms to allow the arms 78 to transfer the package to an upright position. During this transference, a guard 77 makes the final end fold on the package and a finger 101 maintains the fold until the stamping operation is completed. Springs (not shown) in the guide plates 28 prevent the package from falling backwards whilst it rests at the top of the guide plate 28 on a table 130. A gummed revenue or other stamp Z is fed across the end of the package and applied thereto by a stamper which indents the end of the package. The stamper comprises a reciprocating head 105, Fig. 20, and a plunger 109 slidable therein and supported by a spring 114, the downward displacement of the plunger relative to the head 105 being limited by an adjustable stop 112. At its lower end, the plunger carries a block 115 of a size to fit within the walls of the package and pivoted gripping arms 116, 118 controlled by a wedge member 127 on the head 105. When the head 105 moves downwards, the block 115 enters the end of the passage, indenting it and pressing the stamp on to it and the head 105, continuing to descend, causes the wedge 127 to close the lower ends of the grippers and crimp the edge of the package. The block 115 and one of the grippers 116 are grooved to accommodate the finger 101 and the grippers 118 have recesses 118<a> adapted to guide the overlapping ends of the stamps. The sealed package is now displaced along the table 130 by an arm 140 mounted on a slide 142 displaceable along a guide 143 by an elongated pinion 145 which engages rack teeth un the slide, the pinion being driven by a camoperated gear segment 146. Simultaneously the guide 143 is reciprocated vertically to bring the arm 140 into contact with the packages. After each package has been displaced by the width of a package, a finger 155 descends and prevents any backward movement. Rollers 135, 137 press the folded ends and, during the periods of rest of the packages, segmental brushes parallel on shafts press the ends of the stamps against the sides of the packages.