Patent GB-739805-A (GB)
Title: Improvements in the wrapping of articles
Inventor: ROSE ALFRED GERMAN
IPC: B65B9/06
Filed: 1952-06-21
Abstract: 739,805. Wrapping-machines. ROSE BROS. (GAINSBOROUGH), Ltd. Aug. 27, 1953 [June 21, 1952; Aug. 7, 1952; Oct. 22, 1952], Nos. 15686/52, 19873/52 and 26476/52. Class 94 (1). [Also in Group V] A wrapping machine comprises means for feeding articles in spaced succession on to a movable web of wrapping material, means for folding the web around the articles in the form of a continuous tube, and a succession of opposed pairs of heated nipping members arranged to move into nipping engagement with the tube between successive articles to collapse and heat-seal the tube at intervals and at the same time feed the web forward, one pair moving into engagement before another moves out of engagement to provide for continuous control of the web. The nipping members may feed the web intermittently or continuously. As shown, heatsealing members 26 alternating with support members 32 are carried by opposed endless conveyers 24 and serve to feed the web 22 continuously over a supporting platform 23, the web being folded by a guide 27 into the form of a U the upstanding parts of which are folded down by ploughs 29 and 31 to form a continuous tube enclosing the articles 14, e.g. blocks of icecream. The upper conveyer 24 is spring-urged towards the lower conveyer to provide the sealing pressure. After leaving the conveyer 24 the sealed web passes between a further pair of endless conveyers 33 carrying presser members 34 alternating with supporting members 36 which apply further pressure to and cool the sealed portions of the tube. Individual packages are then severed from the web by a pair of rotary cutters 38. As described in Specification 739,808, the blocks 14 are cut from rods 11 extruding from nozzles 12 by a knife 13 which moves at extrusion rate during the cutting operation and is then moved at an increased rate to transfer the blocks along a supporting platform 16 into the path of movement of pusher 18 on an endless chain conveyer 17, a stop member 19 being provided on the platform. The pushers feed the blocks down an inclined plate 21 so that they are deposited in spaced succession on the web. In a modification, Fig. 4, and as described in Specification 739,806 the blocks are cut from extruding rods 39 and transferred to a conveyer 41 by a rake 42, the conveyer 41 delivering the blocks in close file against a stop member 44 on a platform 46 from which they are transferred in succession on to the web by a conveyer 43. In a further modification, Fig. 6, and as described in Specification 739,807, the blocks are cut from the bases of strips 47 arranged in supports 48 by an opposed pair of knives 49 and fall on to a movable transfer member 51 having a series of supporting prongs 52. The member carries each group of blocks to a platform 53, formed with a series of recesses 54 for the passage of the prongs, and the blocks are then transferred from the platform to the web by a conveyer 56. Fig. 7 illustrates the application of the machine to the wrapping of slabs of toffee, the slabs 57 being cut by a reciprocating knife 61 from a rope 58 formed by a batch roller mechanism 59 and being deposited directly on the web 22.