Patent GB-495574-A (GB)
Title: Improvements relating to wrapping machines
IPC: B65B11/08
Filed: 1937-05-18
Abstract: 495,574. Wrapping-machines. PHILLIPS ENGINEERING CO., Ltd., and BROOKE, N. May 18, 1937, No. 13797. [Class 94 (i)] A machine for wrapping-up rectangular tablets comprises means for causing a strip of paper to assume the form of a channel, a conveyer from which the tablets can be transferred one at a time to the channelled paper, and a reciprocating carriage provided with gripping- devices for holding each tablet in the channel while being moved by the carriage to a position at which the paper is severed between successive tablets. The strip A of waxed or plain paper passes from a reel b beneath a stationary metal guide strip e that bears on the centre portion of the paper strip. The edge portions of the paper are bent upwards around the strip e, and are supported in channel form by guide members f on opposite sides of the carriage g which is reciprocated intermittently on a longitudinal track h. The paper strip is withdrawn intermittently from the roll b by a roll k which reciprocates between the positions shown in full and dotted lines in Fig. 2, a brake q preventing the strip from being drawn backward off the carriage. The tablets B are placed on a conveyer 10 and spaced evenly by any suitable means, and the leading tablet is gripped by a pair of jaws 16 and moved laterally on to a vertically movable support 15 above the paper channel. The support 15, which is a horizontal plate attached to a vertically movable slide 38, is then lowered into the paper channel where the upstanding sides of the paper are gripped against the tablet by a pair of grippers 47 which are pivoted to the carriage g. The grippers carry the tablet and paper channel forwards, and are then opened and moved backwards to receive the next tablet while the first tablet is gripped again by similar grippers 48. A rotating knife 60 then severs the paper between the two grippers. The first tablet, with the portion of paper that forms its wrapper, is again carried forwards by another pair of grippers 49 to a position where the upstanding edges of the paper are pressed down in sequence over the upper surface of the tablet, as shown in Fig. 13, by a pair of horizontally pivoted presses 74 mounted on opposite sides of the machine and swung inwards on to the tablet. A presser block 80 next descends and presses the overlapping edges of the paper together, and the required adhesion of the waxed paper may be effected by heating the block 80 in any suitable manner. Folders 93, pivoted on and operated by the slide on which the block 80 is mounted, fold down the ends of the wrappers. The tablet is again carried forwards, and the folding of the ends of the wrapper is continued by folders carried by levers 102 pivoted on the carriage g and swung inwards. The tablet is then carried forwards by the folders to the position, shown in Fig. 1, beneath a plunger 120 which forces the tablet downwards through a gap. This movement folds the remaining parts of the paper to complete the wrapping, as shown in Fig. 14, the tablet being supported during the downward movement by a vertically-moving platform 130. The completed packet is pushed laterally into a discharge passage, the side walls of which may be heated to cause the folded ends of the paper to adhere. When plain paper is used for the wrapper, the edges are secured by adhesive applied by any convenient means.