Patent GB-816831-A (GB)
Title: Improvements in devices for feeding and splicing tape
IPC: B65H19/10
Filed: 1956-03-28
Abstract: 816,831. Feeding webs. THOMPSON, J. K. March 28, 1957, No. 9633/56. Class 100(1) A device for feeding and splicing tape from the leading end of a replacement drum to the expiring end of tape from another drum, comprises a movable carrier supporting the drums, a clamp having gripping jaws between the open jaws of which the tape travels, means for operating the clamp to hold the tape from an expiring drum whilst it is cut and whilst another drum is moved to the withdrawal station, and a jaw of the clamp forming a supporting surface for fastening the tape from the replacement drum to the end of the tape held by the clamp, and is characterized in that means are provided on the magazine carrier for carrying the leading end of the tape from the replacement drum and applying such end to the end of the tape held by the clamp. As shown, a plate 1, Fig. 1 is rotatably mounted on a vertical shaft 2. The plate 1 has six vertical spindles each carrying a rotatably mounted drum 3 of self-adhesive tape. Tape is withdrawn from the drum 3 situated in the withdrawal station, by the machine using the tape. In this position, the drum 3 is adjacent a fixed jaw 5 having a flat face 6 and a knife 8. The fixed jaw 5 co-operates with a pad 9 on a lever 10, 11 that is rocked by a spring 14 upon disengagement of a projection 12 on the plate 1 from a cam surface 13 on the lever 10, 11, thereby causing tape to be clamped between the jaw 5 and pad 9, such that the tape extending between a guide roller 19 and the jaw 5 is cut by the knife 8 upon rotation of the plate 1. Guide rollers 19 are carried on levers 15 which are rocked inwardly between stops 16, 17 partly by engagement with the jaw 5 and partly by springs 18. The rollers 19 have surfaces of material to which the tape will not readily adhere, e.g. nylon. In operation, tape is withdrawn between the pad 9 (and jaw 5, from the drum at the withdrawal station: When the tape on this drum is almost exhausted a roller 30, Fig. 3, engaging the periphery of the tape on the drum 3 is actuated to close a switch 25, thereby energizing a solenoid 23, Fig. 1. The solenoid 23 rocks a lever 22 through a link 22a to release a detent 21 from engagement with a projection 12 on the plate 1, thereby permitting a clock spring, not shown, to rotate the plate 1, such that a new drum is positioned at the withdrawal station. During the rotation of the plate 1 the expiring tape is severed by the knife 8 and the cut end is clamped between the jaw 5 and pad 9. The adhesive side of the free end of the tape from the new roll is pressed, by the adjacent roller 19 against the cut end held by the jaw 5.and pad 9. The pad 9 is then released and tape withdrawal from the new drum commences. If tape is drawn into the tape using machine continuously a tape loop is accumulated prior to the web joining operation or the plate 1 is moved towards this machine. However, if the tape is drawn intermittently the joining operation is performed during a non-withdrawal period. If the tape is gummed tape, moistening means are provided, or if the tape is heat-sensitive the jaw 5 is heated. Should the tape be non-adhesive, adhesive may be applied to the tape by a perforated roller carried by the plate 1.