Patent GB-169851-A (GB)
Title: Improvements in and relating to roller copying machines
IPC: B41L7/04
Filed: 1920-07-17
Abstract: 169,851. Lichtenstein, E. July 17, 1920. Roller copying-presses.-A copying-machine, wherein the introduction of the web of copying- paper is facilitated by displacement of a working roller, is so constructed that, by the transverse movement of the working roller, the free end of the copying-paper on the supply roll becomes positioned in a vertical line with the passage between the displaced roller and its coacting rollers, whereby the copying-paper may be passed between the working rolls without it being necessary for the operator to pass his hand or some special threading device between them. In the arrangement shown in Figs. 1 and 2, the latter Figure showing the displaced positions of various parts of the machine for introduction of the copying paper 1 from the supply roll 2, the working roller 6 and damping-rollers 4, together with one of the cutter bars 11, guide-roller 9 and guide-bar 56, are mounted in cheeks 13 on a shaft 14 geared by a pinion 23 to a segment 22 Icosely mounted on a shaft 16. The latter is provided with a hand-lever 18 and carries a cam 19 adapted to engage the nose 34 of a pivoted catch 32, which is formed with a slot 31 engaged by a cross-bar 30 on the cheeks 13 to lock the latter in position as shown in Fig. 1. Curved edges 29 in the cheeks 13 normally take under pins 28 on links 27 connected to levers 25 carrying the water-trough 3 to support the..latter in raised position. On moving the hand-lever 18 from the position shown in Fig. 1 to that shown in Fig. 2, the cam 19 at once displaces the nose 34 of the catch 32, thus releasing the cross-bar 30 on the cheeks 13 from the slot 31. As the motion continues, the lever 18 contacts with a pin 20 on the segment 22, thereby swinging this segment and actuating the gear 23 on the shaft 14 so as to swing the cheeks 13 through 180‹ to the position shown in Fig. 2. During the first part of this motion of the cheeks 13, the edges 29 move from under the pins 28 supporting the water trough 3, thereby enabling the water-trough to drop out of the path of the working roller 6 and the other parts carried by the swinging cheeks 13. With the parts in the displaced position shown in Fig. 2, the loose end of the copying-web may be lowered between the roller 6 and the other working rollers 5, 7, whereupon, by swinging the band lever 18 to the right, the various parts of the machine are returned to their working positions with the copying-web threaded between them. In the modification shown in Figs. 5 and 6, the hand lever 18 during the first part of its swing is adapted to raise one of the working rollers 7 out of the path of the subsequently displaced roller 6 by the motion of the roller 41 away from the arm 42 of the pivoted levers 12 supporting the roller 7, this initial motion of the arm 42 also acting, through a link 43 and other pivoted members 45, 48, to lower the platform 47 of the water-trough. The continued swing of the band lever 18 then raises the damping rollers 4 by means of the gear segment 57, gear-wheel 58, and rack 59, swings down the arm 53 carrying the cutter bar 11, guide-roller 9, and guide-bar 56, by means of the gears 53, 51 on the swinging cheeks 13 engaging the fixed gear segment 52, moves aside the watertrough 3 by means of the connecting-rods 60, and displaces the working roller 6 which is mounted at the top of the swinging cheeks 13. In the modification shown in Figs. 7 and 8, the displacement of the working roller 6 is effected by an horizontal movement instead of by a swinging movement, the roller 6, guide-roller 9. &c. being mounted on a slide 18. The damping-roller 4 is carried on arms 15 pivoted on a shaft provided with a catch 71 adapted to be engaged by a guide 70 on the slide 18 so that, when the latter is pulled to the right, the damping-roller is lifted to the position shown in Fig. 8. In the arrangement shown in Figs. 13 and 15, additional means are provided for first raising the roller 5 out of the path of the roller 6 before the latter is moved by the slide 18 to the left, these means comprising a hand-lever 120 provided with a cam 130 for applying working pressure between the rollers 5, 6, 7, as shown in Fig. 13, and a second cam 140 adapted to engage a projection 150 on the levers 12 supporting the roller 5 for holding the latter in raised position, as shown in Fig. 15. In a further modification shown in Figs. 16 and 17, the roller 6 is mounted in stationary bearings, the other working rollers 5, 7, and the supply roll 2 of copying-paper being mounted in the swinging arms 13, so that the copying-roll may be brought into position over the space between the cutters. During the swinging of the arms 13, projections 71 on the arms 15 carrying the damping-roner 4 ccntact with fixed stops 70 so as to swing the damping-roller behind the displaced rollers.