Patent GB-338744-A (GB)
Title: Improvements relating to sausage filling and tying machines
IPC: A22C11/12
Filed: 1929-12-03
Abstract: 338,744. Wiederkehr, A., (Assignee of Schelling, F. C.). Dec. 3, 1928, [Convention date]. Knot-tying devices.-A machine for tying sausages, in which the. string is gripped by a string clamp and drawn into a loop around the filled sausage skin, the string clamp being formed as a rotatably mounted slotted shuttle with a resilient clamp for the string and being periodically rotated about its own axis and about the portion of the string located in the shuttle, by means of actuating elements so that after two complete revolutions of the shuttle a knot is formed in the string, is characterized in that for driving the shuttle 35, Fig. 5, there is provided a pair of wheels 27, 28 positively driven independently of one another, the construction being such that the shuttle 35 is moved about its own axis by the wheel 27 and is moved by the wheel 28 in a circle about a guide 52 adapted to receive the loop, the guide, after the formation of the knot, being positively opened to release the string so that the finished loop may be applied to the skin. The gear for operating the shuttle &c. is mounted in a casing 41 attached to the frame of the machine and is driven by a shaft 1. The sausage skin D, Fig. 1, is inserted in the reduced portion of a hollow spigot 40 and is held by the adjustable end of the filler tube 48. A disc 36 carrying the shuttle 35 is revolubly mounted on the spigot 40 and is provided with a fixed gear wheel 28 for driving the disc and a loose gear wheel 27 provided with a cam groove for operating pins 75 for guiding the string on the disc when it revolves to form a loop around the guide 52 previous to the lateral movement of a shaft 53 with attached funnel 50 by which the loop is transferred to the skin. The drive from the shaft 1 is transmitted through bevel wheels 2, 3 to a shaft 4 and through gear wheels 5, 7, Fig. 2, to cams 9, 10. Cam 9 contacts with a pin 11 on a toothed segment 14 which gears with a pinion 21 on a sleeve carrying a wheel 24 gearing with the wheel 28 for driving the disc 36. The cam 10 contacts with pin 12 on a toothed segment 13 which gears with a pinion 20 mounted on a sleeve carrying a wheel 23 for driving the wheel 27 operating the shuttle. The wheel 27 gears with pinion 30, Figs. 3, 5, mounted on a shaft 31 provided with a worm 32 which gears with teeth 33 on the shuttles 35 mounted on a hollow spigot 45 on the disc 36, both the shuttle and spigot being slotted parallel to the face of the disc. The shaft 53, Fig. 1, carrying the funnel 50 is provided with teeth 54 engaged by teeth on a pivoted segment 55 which is rocked by a non-circular disc 58, Fig. 2, on the shaft 1. The string Z is held by a spring 62, Fig. 5, in a slot 61 of the shuttle 35 and passes through a movable guide 72, Fig. 8, comprising a gripper and cutter to a pin 71 on a slack adjusting disc 105 and thence to a brake roller 70. The guide member 72, is mounted on a plate 81 pivoted at 80 driven by a cam 82 on a shaft 83 rotated by wheels 7, 84, Fig. 2. The rope passes under a pin 87, Fig. 9 and through a slot 85, Fig. 10 in the guide member and between these two guides are a string gripper 88 and a cutter 100 operated respectively by sectors 88<1>, 101, through bell-cranks 92, 102, and rods 95, 103 contacting with cams, pivoted to the plate 81 and driven by a cardan shaft 97, Fig. 2, and wheels 122 and 6 from the shaft 4. A hook 120 is adapted to engage the string in order to prevent it leaving the groove 85 when the guide member 72 is reciprocated and the string is formed into a loop by the shuttle 35. The string is held taut by the pin 71, Fig. 8, secured to the rotatable disc 105 geared by a wheel 107 to a quadrant 108 pivoted to the casing at 109 and pressed against a cam 112 by a spring 110. The cam reciprocates the quadrant to turn the disc 105 which releases the string when pulled along by the shuttle 35 and again grips it when the surplus string is to be again brought back for reducing the string loop formed by the shuttle. The tying operation is as follows :-The end of the string Z is held in the gripper 88 the guide member being in the position shown in Fig. 8, the shuttle 35 being above the string and set so that its slot 61 is in the plane of the string. The disc 36 rotates anti-clockwise for the string to enter the slot 61 and the gripper 88 opened. The disc then rotates clockwise Fig. 14 (not shown) to release the guide 72 so that it moves to the left by the rotation of cam 82. The disc then rotates in an anti-clockwise direction slightly more than a revolution, Fig. 15 (not shown), the string lying on the pins 75 and the shuttle making a rotation of about 135‹ so that the slots 65, 66 in the shuttle and hollow spigot are in register for the entrance of the string. The disc 105 with pin 71 has been so moved by the actuating elements 107, 108, 110, 112, that the string is pulled up with very little friction. The disc 36 then remains stationary whilst the shuttle makes a complete revolution about its own axis to form the first loop of the knot and the pins 75 retracted by the movement of the wheel 27 to release the loop. The disc 36 is then rotated 30‹-40‹ clockwise, Fig. 16 (not shown) and the guide member 72 then moves the loop towards the right against the guide 52, the gripper 88 remaining open, Fig. 17 (not shown), and returning to its original position. The disc then moves anticlockwise, Fig. 18 (not shown), for the string Z to again enter the slot 65 in the shuttle. The shuttle then makes a complete revolution about its own axis and forms the second loop, Fig. 19 (not shown), and the disc then moves clockwise. Simultaneously the disc 105 with pin 71 is moved anti-clockwise so that the knot is drawn tighter and the string Z tautened. The string is thus drawn out of the slot 61 in the shuttle, Fig. 20 (not shown). The funnel 50, Fig. 1, is then moved laterally and the loop falls from the guide 52 on to the tightly filled skin D and the guide member 72 moved to the right whilst the disc 105 is moved anti-clockwise. The knot is thus pressed against the axis of the disc 36 and drawn tight. The cutter 100 is then moved to cut the string, previous to which the gripper 88 holds the string Z ready for the next operation.