Patent GB-457063-A (GB)
Title: Improvements in or relating to apparatus for making truncated conical tubes
IPC: B31C7/04
Filed: 1935-08-29
Abstract: 457,063. Machines for making cardboard tubes. WOOD, D., and D. W. CONTAINERS, Ltd., 29, Peter Street, Manchester, and ROSE, A. G., and ROSE BROS. (GAINSBOROUGH), Ltd., Albion Works, Gainsborough. Aug. 29, 1935, No. 24122. [Class 99 (ii)] In a machine for making truncated conical tubes of cardboard in which a cardboard blank 39 with converging edges is transferred by a conveyer from a blank-receiving station opposite a counter 38 to a blank - applying station adjacent a conical former 10 around which it is wrapped, the conveyer comprises a turntable 9 which has one or more pairs of converging guides, each pair being preferably constituted by the sides 37 of an open - ended shallow recess 36 in the turntable, and is rotated intermittently so that it pauses with a pair of guides positioned first opposite the counter 38, then at a blank locating station, and finally underneath the former 10, At the blank locating station means is provided for moving a blank located in the recess 36 inwardly between the guides 37 so that its converging sides are engaged with the guides to position the blank correctly in the said recess prior to its application to the former. The invention is shown applied to a machine employing eight formers which are arranged radially on a wheel 8 and are moved intermittently so that each pauses in turn at the blank-applying station, and preferably four recesses 37 are provided in the turntable, the recesses being so spaced that one is located at each of the stations when the turntable pauses. The former wheel and turntable are actuated by a shaft 25 through Geneva mechanism and geared shafts 13, 19 respectively, the shaft 25 being rotated continuously by a main driving shaft 29. The locating means comprises fingers 40 formed integral with a bell-crank lever 41 having a roller co-operating with a cam 44 which is secured to the driving shaft 29 and normally holds the fingers away from the turntable but which permits a spring to rock the lever so that the fingers move into slots 45 in the table and engage the outer edge of the blank at the desired moment. A gumapplying device which comprises a felt pad 58 mounted in a slot at the bottom of a downwardly extending member 51 to which gum is supplied by a pipe 59 is also disposed at the blank-locating station. This device is normally retained in the position shown in Fig. 5 by a lever 65 in engagement with a cam 70 on the shaft 29, but when the blank has been located by the fingers 40 the cam permits the device to fall under its own weight and the pad to contact with the blank along one side edge 71 thereof. The blank is prevented from adhering to the pad by a spring-pressed foot 62 which is carried by the member 51 and is normally below the level of the pad. The machine also includes a member 46 at the blank-applying station which has semicircular upstanding arms and is raised through an opening 47 in the table to lift a blank into engagement with and partly wrap it around a former by a lever 78 in engagement with a cam 85 on the shaft 29. The mechanism for completing the wrapping operation is not described.