Patent GB-740026-A (GB)
Title: Apparatus for folding and stacking paper
IPC: B65H45/20
Filed: 1954-02-05
Abstract: 740,026. Folding paper; feeding webs. GOEBEL AKT.-GES. Feb. 5, 1954 [Feb. 7, 1953], No. 3529/54. Class 100 (1). In apparatus for the folding and subsequent zig-zag stacking of a continuously fed web of paper or material, the web is driven by a periodically-reciprocating device which carries at the delivery end one or two folding knives over which, at the moment the reciprocating device is stopped, the web is folded by two alternately operating, periodically moving grippers, and is taken along at the folding position by the subsequent movement of the grippers, to be subsequently released at a determined position. The web of paper 1 travels between feed rollers 2 and 3 to the reciprocating device 4 running on guide rails 5 and 6 and reciprocated through linkage 7, 8, ... 11, by an adjustable eccentric 12, driven at a rotational speed conforming to the length of the format. The device 4 includes two feed rollers 16, 17, which may be intermittently driven or continuously driven, and in the latter event must allow slip and are then preferably constituted as suction rollers. The device 4 is provided with two folding knives 19, 20 against the side faces of which the web may be pressed by clamping- devices 23, 24, and 21, 22, respectively. The clamping devices are fixed to bars 25, 26, 27, 28 in turn fixed to vertical bars 29, 30 interconnected by a horizontal bar 31 so that one set of clamping devices is operative whilst the other set is retracted. The clamping devices are operated by means of an arm 32, to which they are connected, having a cam follower 33 running in guides 34, 35. The guides 34 and 35 are moved horizontally to operate the clamping devices by a cam 40 through linkages 36, 37, ... 39. The cam 40 makes one revolution during two reciprocations of the device 4 so that when the device is at its uppermost position in one cycle the web is clamped against the side of the knife 19 and is then drawn down by the device 4 to the position shown. The cam 40 then causes the web to be released during the upward travel of the device 4, the web being then fed by the rollers 16, 17, and to be clamped against the side of the knife 20 the next time it reaches its uppermost position. The cam 40 is geared to the eccentric 12 by gears 42, 43 so that the latter makes two revolutions to one revolution of the cam 40. Co-operating with the folding knives 19, 20 are gripper devices 44, 45, and 56, 57 respectively. The device 44, 45 is mounted on an arm 46 pivoted on a shaft 49 and oscillated by a link 54 connected to a rotating disc 55. The shaft 49 also carries a cam 48 having a profile engaging a cam follower 50 on an arm 51 connected to the gripper jaw 45 and adapted to move the jaw 45 away from the jaw 44 at the moment the jaws are to release the folded web and to close the jaws at the instant when the web is folded therebetween when the device 4 is in its lowermost position as shown. The cam 48 is continuously rotated at the same speed as the disc 55 in an anti-clockwise or clockwise direction, the profile being constructed accordingly. Each gripper device makes one oscillation for every two reciprocations of the device 4 and they are operated alternately, the construction of the operating parts of the gripper 56, 57 being identical with those of the gripper 44, 45. When the length of the format is desired to be altered the timing of the opening of the grippers must be adjusted and to this end two cams may be provided instead of the single cam 48, the roller 50 co-operating with both. The two cams are then arranged to be displaceable relatively to each other so that their effective profile is varied. Similarly two cams may be provided for the gripper 56, 57.