Patent GB-232267-A (GB)
Title: Improvements in or relating to box covering machines
IPC: B31B15/00
Filed: 1925-04-14
Abstract: 232,267. Stokes & Smith Co., (Assignees of Federwitz, T. A., and Bailey, W. T.). April 12, 1924, [Convention date]. Machines for covering boxes. In a machine having a number of cover-applying units provided with means for operating the covering tools, the finished box may be ejected in any direction by arranging the box ejector on one of the units and actuated thereby or by arranging the upstanding member or column carrying the form - block mechanism intermediate of adjacent units. As shown the box ejector 37 is carried by a housing 24 on the unit 12 and the column 58 carrying the form-blocks and actuating- mechanism is arranged at a corner of the table 11 and diagonally with respect to the form-block, platen and cover-applying units. The cover-applying tools are carried by two pairs of adjustable slide units arranged at rightangles on the table 11 and having cams actuating the tools, the slides 12 each having a single cam 14 driven from a shaft 9 geared to the main cam 6 and having three grooves actuating followers connected to the tool-carrying slides, one of which 22 is actuated from the groove 18. The slide 22 of the unit 12 carries a member 25 disposed in the housing 24 and a block 26 projecting from the member 25 co-operates with the lever 28 of the mechanism for ejecting the finished box from the machine. The lever 28 is pivoted on a shaft 27 in the housing 25 and has a pin 36 engaging a circumferential groove in the slidable part 37 of the box ejector and within which is disposed a plunger 38 containing the ejector plunger 39, the internal construction of these parts being that described in Specification 2974/25; the lever is forced by a spring 29 to hold the ejector members 37, 38, 39 retracted and is held in that position, when the slide 22 is at the limit of its outward movement, by a gravity latch pivoted on the lever 28 and engaged by the block 26, while a spring-controlled detent 30 also pivoted on the lever engages in front of the biock 26, the plunger 38 having previously come to rest with its flange 38<a> engaging the housing 24 and the final movement of the barrel 37 causing the ejector plunger 39 to become latched to the plunger 38. The slide 22 is then moved inwards towards the platen and forces the detent 30, lever 28 and ejector members inwards, until the shoulder 38b on the plunger 38 engages the housing; the barrel 37 is then moved further inwards compressing a spring therein until the ejector plunger is unlatched from the plunger 38 and the compressed spring moves the ejector plunger 39 inwards to eject the box from the platen. At the ends of its inward movement the end 33 of the detent contacts with an adjustable abutment 32 and releases the detent, the spring 29 then returning the lever 28 and ejector members to the retracted position. A main part 88 of the two-part form block is carried by a tubular plunger 85 longitudinally slidable in bushes 65 carried by an outer tubular plunger 64 supporting the usual box-stripping elements and also longitudinally slidable in bushes 63 carried in a head 62 on a bracket 60 projecting from a vertical column 58 fixed to the table 11; the auxiliary part 92 of the form block is carried by rods 91 disposed in the tubular plunger 85 and secured to a plate 90 bearing on a plug 89 in the end: of the plunger, a spring 94 being arranged between the inner end of the plug and one end of a bolt 93 fixed at its other end to the plate 90 and extending freely through the plug. The form block as well as the other parts of the machine are actuated from a main cam 6 mounted on a bearing sleeve 2 and driven through a one-revolution clutch from worm-gearing 3, 4, the parts by which the form block and the box-stopping elements are actuated being arranged on opposite sides of the column 59 and head 62. The form block is actuated by a lever 109 engaging a groove 111 in the main cam and connected by a rod 107 to a lever 102 pivoted at 75 to a bracket 59 projecting from the column 58; the end 103 of the lever is connected to a spring 104 arranged so that the force exerted thereby upon the plunger 85 and form block is approximately constant and the end 101 of the lever is connected by an adjustable link 100 with a pin 96 fixed to the plunger 85, the pin extending through slots in the outer plunger 64 and head 62 and carrying a roller disposed between vertical guide members 99. The box-stripping elements are similarly actuated from a groove 83 in the main cam. The platen 44 is carried bv a rod 43 slidable vertically in the bearing 2 and having a head 42 disposed in an arcuate guide 41, the head being connected by a link 46 and lever 48, 52 to a spring 54 which is arranged so that the force exerted upon the platen is approximately constant throughout its movement.