Patent GB-854479-A (GB)
Title: Improvements in or relating to paper sheet conveying and registering mechanism
Inventor: FRY STANLEY REGINALD
IPC: B65H9/06
Filed: 1956-02-06
Abstract: 854,479. Feeding sheets. CAMCO (MACHINERY) Ltd. Feb. 5, 1957 [Feb. 6, 1956], No. 3655/56. Class 100(1) Paper sheet conveying and registering mechanism comprises means for conveying a paper sheet to a first lay stop when the sheet is registered, means for displacing the first lay stop to allow the sheet to pass to a second lay stop where it is again registered, and reciprocating gripper means for engaging the forward edge of the sheet when registered by engagement with the first lay stop and for drawing the sheet towards the second lay stop after movement of the first lay stop out of its sheet obstructing position. The paper sheet S (Fig. 1) is carried by tapes 42 towards a first front stop 10 which registers it for perforation by a device 11, 12. The stop 10 is then moved downwardly below the level of the sheet, the sheet being forwarded with the assistance of grippers so as to register against a second front stop 22 so that it may be folded by a knife 23 and cylinders 24, the fold taking place along the line of the perforations. The stop 10 comprises a metal bar disposed between side frame plates 41 and secured on an angle section member 44. The member 44 is provided with lugs 45 at each end to which are pivoted link arms 14 and with lugs 47 to which are pivoted further links 15. The stop 22 is provided with lugs 49 to which are secured upstanding carrier bodies 13 bored to receive horizontal support rods 25 secured to the main frame. The stop 22 is also provided with lugs 50 and 52 to which are pivoted the link arms 14 and 15 respectively. Each end of the member 44 is provided with a lug which receives a stub shaft having a roller 16 arranged to ride on a guide bar 17 (Fig. 6). The bar 17 is provided with two axle stubs 55 on which are pivoted levers 18, 18a, the opposite ends of which are secured to transverse axles 19, 19a journalled to the adjacent frame plates 41. Each of the axles 19 is extended beyond the frame plates 41 and has secured thereto a further lever arm 20, the free ends of which are provided with operating rods 21 which extend downwardly to a slotted guide 57 each having a cam follower roller 58 in engagement with a cam 59 secured to a shaft 60 which makes one revolution during each perforating and folding operation. As the shaft 60 rotates, the arms 20 are also rotated, together with the levers 18, 18a so as to lower. the guide bar 17. The rollers 16 on the member 44 follow the movement of the bar 17 thus causing the stop 10 to be lowered, a slight rotary movement being given to the stop by virtue of the differing lengths of the link arms 14 and 15. The position of the stops 10 and 22 may be longitudinally adjusted. To this end the bodies 13 are each secured to the rods 25 by adjustable clamps comprising an externally threaded rotatable sleeve 26 on each rod 25, each sleeve being provided with a grub screw for securing it to the rod 25 at any desired position. Locking nuts 27 are provided ori the bodies 13. To assist the tapes 42 in forwarding the perforated sheets to the stops 22 for folding, grippers are provided each comprising a fixed jaw 30 and a movable jaw 35 (Fig. 3). The jaw 30 is secured to the underside of a slide member 32 which is itself carried upon a horizontal guide rod 34. The jaw 35 is carried on an arm 36, pivoted at 37 to the member 32 and having a roller 38 for engagement with a fixed cam surface 39 and a roller 66 for engagement with a surface 67 of a block 68 secured on the guide rod 34. Engagement of roller 66 with surface 67, or of roller 38 with surface 39, causes the gripper jaws to open. The slide member 32 is secured at 69 to a reciprocating rod 33 connected by a link arm 71 (Fig. 6) to levers 72 on an axle 73 carried in the frame plates 41. The levers 72 form part of a bell crank, the other arm 74 of which is adapted to be oscillated by means of a rod 75 provided with a cam follower for engagement with a transverse cam shaft 76 geared to the shaft 60. The arrangement is such that the grippers are advanced towards the sheet S as the sheet approaches the stop 10. At the end of their travel the jaw blades have been opened by engagement of the roller 66 with the surface 67. After perforation of the sheet the stop 10 is lowered and the grippers begin to travel in the same direction as the sheet. As soon as the roller 66 loses contact with the surface 67 the grippers grip the edge of the sheet and draw it towards the stop 22. When the sheet contacts the stop 22 the grippers slide at least partially off the edge of the sheet and the jaws are opened by engagement of the roller 38 with the surface 39.