Patent GB-206534-A (GB)
Title: Improvements in brush forming machines
IPC: A46D3/04
Filed: 1922-05-04
Abstract: 206,534. Marks, E. C. R., (Kent-Owens Machine Co.). May 4, 1922. Brush-making machines.- Tuft picking mechanism comprises two relatively-movable co-operating picking needles and a reciprocating pressor point, the latter acting to enter the bristle magazine prior to the entry of one of the picking needles to press forward the bristles adjacent the picking point. On the upper portion of a frame 1, Fig. 1, is mounted a main shaft carrying a pulley 3 driven by means of an electric motor. The shaft is provided at one end with a disc 6 to which is secured a crank pin 7 formed with an angular extension carrying a crank-pin 9, the pin 7 being adapted to drive the tuft-picking mechanism. while the pin 7 operates the nozzle 123 of the tuft-setting mechanism which is described in Specification 206,802. The arrangement is such that a cycle of movement having periods of different velocity is imparted to the tuft-picking and tuft-setting mechanisms. all impact operations on the bristles being performed during periods of low velocity and movements of translation during periods of higher velocity. The bristle magazine comprises top and bottom members 28, 29, Figs. 1 and 2, and two side members adjustably mounted on studs 26, 27 provided on a portion 25 of the frame. The bristles are preyed downwardly by a spring-pressed follower 34. At the lower end of the magazine is arranged a member 44 provided at one end with a horizontal portion 61, slidably mounted in a vertically-adjustable guide 81, and connected at the other end by means of a lever 77 and link 75 to a bell-crank lever 49. One arm of the lever is connected by a link 51 to a pitman 52 actuated by the crank-pin 7, the other end being slotted to engage a stud on a slide 46 which is mounted, together with a slide 47, in a guideway 45. The slide 47 has a lost-motion connection with the slide 46, so that it commences to travel downwards only after the slide 46 has moved a certain amount. The slides are provided each with a picking needle, Fig. 6, the needle 63, which is hook-shaped at the bottom, being pivoted at 68 to the slide 47 while a pointed needle 62 is fixed to the slide 46. The needles are adapted to pick a tuft of bristles and carry it down vertical guideways 59, 60 to a passage-way in the nozzle 123. Towards the end of the movement the lower end of the needle 63 is moved aside by means of a cam surface 72 acting on the upper end. The picking needles are operated in conjunction with the member 44 and a reciprocating pressor point 64 which act to press the bristles towards the needles. The pressor point is pivotally connected to a reciprocating slide 86, Fig. 9, which is operated through a lostmotion connection by a slide 88 connected by the pin 89 to the pitman attached to the crank-pin 7. A finger 90 in the slide 86 projects into the path of yielding bumpers 91, 95 on the slide 88. In addition to its reciprocating motion the pressor point 64 is moved upwardly to engage the bristles during its forward movement and lowered on return, by means of a rock-arm 98 connected to the rod 65 and engaging a cam 99 on the slide 88.