Patent GB-736684-A (GB)
Title: Improvements in machines for wrapping spools or bobbins and tubes
IPC: B65B11/02
Filed: 1952-02-15
Abstract: 736,684. Wrapping-machines. ENGLISH SEWING COTTON CO., Ltd., and PRESTON H. May 13, 1953 [Feb. 15, 1952], No. 4028/52. Class 94 (1). wrapping yarn packages which are circular in cross section wherein the wrappin material is supported in the machine in roll form and is drawn to the wrapping position between draw rollers, is cut automatically by a guillotine into the desired length for.wrapping, is then wrapped by wrapping mechanism round the yarn package and after the wrapping has been completed the ends of the strips of material are engaged by an electrically heated device to seal them together. As shown, the sheet wrapping material, Fig. 1, is drawn from the supply roll A by means of rollers C<SP>1</SP>, C<SP>2</SP> the lower C<SP>2</SP> of which is driven by gearing c<SP>1</SP> and c<SP>4</SP> and transverse shaft C from the main shaft B2 and in turn drives the upper roller C<SP>1</SP> through gearing c<SP>2</SP>, c<SP>3</SP>. The drive is interrupted at each wrapper length by the lifting of the upper roller C<SP>1</SP> by means of a cam on the shaft C and the roller C<SP>1</SP> is retained in the upper position until the next wrapper length is required by means of a pin d<SP>3</SP> or a lever D<SP>1</SP> which engages a peripheral recess d<SP>4</SP> on a disc d<SP>5</SP> mounted on the shaft of the bottom roller C<SP>2</SP>. The lever D<SP>1</SP> is pivoted by a cam D<SP>2</SP> on the shaft C by means of a cam-roller d<SP>7</SP>. The forward length of the sheet is severed by a guillotine F also controlled by a cam on the shaft C. The package G is supplied from a hopper to arms G<SP>1</SP> having holding pins g and when a severed length of wrapper is in the wrapping position lever H<SP>2</SP> operated by a cam H driven by gearing from the shaft B<SP>1</SP>, Fig. 2, operates the arms G<SP>1</SP> to lower the package into its wrapping position. In this position its bore is engaged by conical ends of two shafts J which are moved inwards by levers controlled by cams J<SP>2</SP> driven from the main shaft B<SP>2</SP> and thereafter the arms G<SP>1</SP> are raised away from the package. The severed wrapper is then wrapped around the package by the rotation around the periphery of the package of the members K<SP>1</SP> and K<SP>2</SP> whose movements are illustrated sequentially in Figs. 8 ... 12. Each wrapping member K<SP>1</SP> and K<SP>2</SP> is mounted between two arms k<SP>1</SP>, k<SP>2</SP> carried by sleeves M on each shaft J, the sleeves also carrying pinions m<SP>1</SP>, m<SP>2</SP> in engagement with racks N<SP>1</SP>, N<SP>2</SP>. The racks N<SP>1</SP>, N<SP>2</SP> are driven by pinions n<SP>1</SP>, n<SP>2</SP> mounted on shafts J<SP>3</SP> and J<SP>4</SP> respectively, the pinions n<SP>1</SP>, n<SP>2</SP> being mutilated to give the required sequences of rotational movements to the wrapping members K<SP>1</SP>, K<SP>2</SP> and means being provided to hold the racks in certain positions corresponding to periods of non-movement of the members K<SP>1</SP>, K<SP>2</SP>. In the final wrapping movement Fig. 12, the member K<SP>1</SP> moves anti-clockwise to hold the overlapping ends of the wrapper a, the member K<SP>2</SP> moves clockwise off the overlapping portion and a heat-sealing tool L mounted on a shaft l carried by arms L<SP>1</SP>, P and controlled by a cam P<SP>1</SP> on the shaft J<SP>4</SP> is brought into contact to seal the overlap. The oncoming uncut sheet wrapper material is held during the wrapping movements by a holding-arm R operated by a cam R<SP>1</SP>. In order to facilitate correct registering of printed material a further cam S on the shaft R<SP>2</SP> of the cam R<SP>1</SP> controls a roller c above c slot in the table B which when operated pulls back the material a forward of the holding position R so that it passes under a scanner T. The response of the scanner T to the correct registration operates by means of a solenoid T<SP>2</SP> a further holding arm t which holds the next, uncut, length of wrapper in its correct position. Cams V on the shaft C de-energize the solenoid and remove the various holding devices at the commencement of each cycle.