Patent GB-1135256-A (GB)
Title: Method and apparatus for the production of carpets or the like
IPC: D05C15/00
Filed: 1966-10-10
Abstract: 1,135,256. Tufting. BERSAL, G.m.b.H. 10 Oct., 1966 [27 Oct., 1965], No. 45177/66. Heading D1G. Tufting apparatus comprises a housing, and a finger displaceably mounted within the housing, whereby, in operation, the finger engages a thread piece at or about the centre thereof folds the thread piece into an open loop by pushing it through a passage, and introduces the open loop with its closed end forward into a hole of a mesh canvas. The loop is subsequently stuck to at least one of the weft or warp threads defining the canvas. A carriage 13 is slidably supported on fixed bars 14, 15. The forward edge of bar 14 is formed with a channel 17, and bar 14 is provided adjacent channel 17 with upstanding pegs 83 spaced apart at the distance between adjacent holes in an open-mesh backing fabric 12. The latter is pressed on to bar 14 by a plate 18, a row of holes being aligned with channel 17 and the adjacent row being engaged with the pegs 83. Plate 18 carries a row of ratchet teeth 19 in spaced alignment with the pegs 83. A bar 49, rigid with carriage 13, slidably carries a plate 57 supporting various coloured yarns 60, the free ends of which are held in grooves by leaf springs 61. Plate 57 is connected by a link 56 to a sector 53 rigid with a handle 52 journalled on bar 49. Rotation of handle 52 thereby serves to align a yarn of selected colour with channel 17. A plate 22, upstanding from carriage 13, journals a cam disc 31 rotatable by means of a handle 32 for pivoting levers 23, 25 journalled on plate 22. Lever 23 is connected via a link 42 to a plate 24a pivoted at 37 to carriage 13. Plate 24a and an arm 24b, pivoted thereto, define co-operating yarn-gripping jaws 40 spring-biased to the closed position. The inner edge of arm 24b is cam-shaped to co-operate with a roller 38 on rotation of plate 24a. A cam (44), rigid with plate 24a, engages a lever 46 carrying a pawl 20 co-operating with the ratchet teeth 19. A yarn-controlling finger 48 is also rigid with plate 24a. Lever 25 is connected by a link 50 to the movable blade of a pair of yarn-cutting shears mounted on bar 49. A lug 33, rigid with handle 32, carries a pin (34) engaged in a slot (35) at one end of a link 36 pivoted at its other end to a lever 27 pivoted on plate 22. Lever 27 carries a curved finger 28 adapted, on pivoting of lever 27, to pass downwardly through a vertical tube 63 disposed above channel 17. Rollers 69, mounted on bar 15, carry a pattern sheet (66). A plate 72, slidable on a rod 71, is formed with a notch 73 enclosing the pattern square corresponding to the tuft next to be inserted. A pawl (76) on plate 72 engages a ratchet bar (72) which is axially slidable and is spring- biased to engage a pin 81 thereon with one arm of a bell crank lever 82, the other arm of which is normally engaged with lever 23 to hold bar 72 in one end position. In operation, handle 32 is moved upwardly, whereby finger 28 is raised, shears 26 are opened and plate 24a rotates clockwise to shift jaws 40 towards the selected yarn end. Near the end of the upward movement of handle 32, roller 38 and arm 24b co-operate to open jaws 40. Initial movement of lever 23 disengages lever 82 from pin 81, whereby ratchet bar (77) shifts to engage pawl (76) with the next ratchet tooth. Handle 32 is then moved downwardly. Thereby, plate 24a rotates counterclockwise, causing jaws 40 to close and to draw a length of yarn across the upper end of tube 63, while cam (44) turns lever 46 counterclockwise and pawl 20 co-operates with a ratchet tooth 19 to shift carriage 13 in the direction A. The shears 26 are then actuated to sever the fully-drawn length of yarn, and a pin (51) on link 50 engages arm 24b to open jaws 40. Pin (34) initially moves along slot (35) to permit finger 28 to rest upon the drawn length of yarn. Finger 28 then moves downwardly to pass through tube 63 and engage the base of channel 17. The yarn length is thereby folded upon itself and passed through tube 63 and fabric 12, the upper ends of the yarn length remaining in tube 63. Finger 48 presses back the previouslyformed tufts. Lever 23 actuates lever 82 to re-engage pin 81, whereby pawl (76) shifts plate 72 in the direction A. After the insertion of a row of tufts, the nozzle of a latex adhesive container is drawn along the base of the row to secure the tufts to the base fabric. The next row of holes in the base fabric is then positioned above channel 17, and the next pattern row is aligned with the notch 73. It is stated that each tuft may be stuck to the base fabric immediately after insertion.