Patent GB-654882-A (GB)
Title: Improvements in ejecting mechanism
Inventor: ROSE ALFRED GERMAN
IPC: B65B57/12
Filed: 1948-04-23
Abstract: 654,882. Endless belt conveyers. ROSE BROS. (GAINSBOROUGH), Ltd. April 23, 1948, No. 11204. [Class 78 (i)] Apparatus for ejecting wrappers, cards or other sheet-like articles from a conveyer consists of a member movable transversely of the plane of movement of the articles on the conveyer, the movable member having a pair of grippers mounted on it on opposite sides of said plane and adapted to seize a passing article during the transverse movement of the member and move the article clear of the conveyer where it is withdrawn from the grippers. Wrappers 11 are supported and pushed along a platform 14 by pushers 13 on an endless chain conveyer 12. A movable frame comprises bars 16 joined transversely by a rod 19 at its lower end and a bar 27 at its upper end. Two bracket arms 28 attached to the ends of bar 27 provide bearings for a rod 29 having a plurality of spaced double arm cranks 31, 35, secured to it. Rollers 33 on the ends of arms 31 are urged by springs 37 extended between arms 35 and bar 27 into contact with a plurality of members 34 which are spaced transversely of the frame and secured to rod 19 and a cross bar 36. A pair of arms 32 are also secured near the ends of rod 29 and support each an adjustable bolt 38 which comes into contact with a side board of the conveyer, when the frame has been lowered until the tops of members 34 are flush with platform 14, so that rollers 33 are raised slightly off the members 34. The wrappers thus travel freely along the conveyer. When a faulty wrapper is to be ejected the frame is moved lengthwise and upwardly whereby rollers 33 grip the wrapper against members 34 which lift the wrapper to rollers 72, 73, Fig. 5, which are continuously driven so as to catch the wrapper and feed itbetween them into a tray 76. The means for moving the frame is controlled by a sensing device which transmits an electric impulse when a faulty wrapper passes it. The frame bars 16 slide in a pair of bosses 17 on fixed side members 18 and the lower end of the frame is connected pivotally by its rod 19 to a pair of double arm cranks 22, 23 pivoted on a shaft 24 between side members 18. A roller 42 is mounted on arm 39 of a second doublearm crank 39, 41. The crank 39, 41 is oscillated every time a wrapper passes the ejector by roller 42 travelling on a cam 43 on a shaft 44 driven in synchronism with the conveyer. The other arm 41 of this crank is provided with a sleeve in which a transverse pin 46 slides so as to project into the path of arm 23 when it is desired to couple it to arm 41 so that the frame will be raised and that particular wrapper which is passing will be ejected. Cranks 22, 23 and 39, 41 are each provided with an extra arm from which a spring 25 or 59 respectively, Fig. 2, is stretched to urge the frame to its lowered position and urge roller 42 on to cam 43 respectively. Pin 46 is controlled through a two-arm crank 47, 48 pivoted at 51 on the arm 41 so that the end of arm 48 is in line with shaft 24 and so remains stationary as crank 39, 41 is oscillated. An arm 53 engages the end of arm 48, a crank formed by arm 53 and an arm 54 transmitting an oscillating motion from a cam 58 on the shaft 44 through the follower roller 57 so that pin 46 is withdrawn every time crank 39, 41 is oscillated by cam 43. On a faulty wrapper being detected, the electric impulse is fed to a magnet 62, which attracts an arm 63 against the resistance, of a spring 65 swinging it about a pivot 64 into the path of a projection 66, Fig. 2, on the crank arm 54 so preventing roller 57 from following cam 58 where it recedes. Pin 46 thus remains in engagement with arm 23 and thus oscillates the frame.