Patent GB-197959-A (GB)
Title: Improvements in advertising apparatus
IPC: G09F11/34
Filed: 1923-05-18
Abstract: 197,959. Hasselburg, B. A. L., and Ostberg, K. G. May 19, 1922, [Convention date]. Addition to 193,421. Sheets and like elements, travelling.-In a modification of the apparatus described in the parent Specification a number of longitudinal grooves 15 are formed in the upper roller 7 for the purpose of forcing the transferred sheet down behind the pack 1 when the roller 7 turns slowly, the sheet being driven to the bottom 3 of the container by the friction of the following sheet. The grooves 15 do not extend the full length of the roller 7 so that the edge of the sheet will be bent and stiffened as the groove contacts therewith. The bottoms of the grooves 15 are preferably plain and arranged so as to be substantially parallel with the leaf when seized by the shoulders 16 between the grooves. The front sheet 1 is fed upwardly by two fingers 18 each consisting of a bent-over plate which embraces a sheet transferring belt 10 and is curved so that the belt passes through it with friction. Hooks 20, 21 at top and bottom of the fingers engage a fixed pin 23, and when in engagement the pressure of a rubber-covered side 19 of the finger 18 on the front sheet 1 is lessened. The bottom shaft 8 is driven intermittently, and when started from the position shown in Fig. 2 the finger 18 is carried upwardly by the frictional engagement of the belt 10. The hook 20 leaves the pin 23 and the finger 18 presses on the front sheet 1 owing to the tension of the belt 10, thus forcing up the sheet until its top edge is gripped between the roller 7 and belts 10. When the pin 23 is reached by the hook 21, it arrests the finger 18 and raises it off the pack 1. After the transferred sheet has passed round the roller 7 and been pushed down by the grooves 15, the shaft 8 is reversed in order to bring the fingers 18 back to the position shown in Fig. 2. This reversal is effected by a helical spring embracing the shaft 8, the spring being fixed at one end and frictionally engaging at its other end the shaft 8, which is preferably conical. To ensure only one sheet 1 passing upwardly at a time abutments 28, 29 embracing the top and front of the pack 1 are provided at the upper corners. Between the abutments 28, 29 is a channel 30 which allows only one sheet to pass. The front lower edge of the abutment 28 is bevelled, and the channel 30 is widened at the extreme corners. The vertical side walls of the casing converge towards the front to align the sheets 1. The casing is bent at 33 to guide the sheets 1 and to give them a curvature in the opposite direction to that induced in them by their passage over the roller 7. A manipulative opening 34 is provided, and the apparatus is adapted to be placed in a glassfronted frame. In a modification, the fingers 18 are replaced by the belts 10, which may be of rubber or rubber-coated, rollers &c. on levers serving to press the belts against the sheets 1 during the feeding period. The Specification as open to inspection under Sect. 91 (3) (a) describes the apparatus shown in the cancelled Figs. 1, 6, 7, in which a block of sheets 1<x>, Fig. 6 (Cancelled), of paper &c. bearing advertisements on both sides is contained in an open-fronted metal casing 1 at the top of which is a shifting roller 6 driven by belts 9 from pulleys 10 on an adjustable shaft 14. The roller 6 is driven intermittently and each sheet after reaching the front is pushed up till its edges are caught between the roller 6 and the belts 9 and transferred round the roller to the back of the block, the top 13 of the casing acting as a guide. A plate 27, Fig. 7 (Cancelled), may be provided to form a slot wide enough to allow only one sheet at a time to pass up to the roller 6. To prevent the sheets assuming a permanent curve they are bent in the reverse direction by a flange 12 when passing down behind the block. Each sheet on leaving the roller 6 reaches its required position by its momentum, which may be supplemented by longitudinal grooves 25 cut in the roller 6 to form abutments which will engage the rear edge of the sheet and force it down. Parts of the inner sides of the casing are inclined to align the sheets as they move gradually to the front. The means for pushing up the front sheet comprise a rubber-tipped V-spring 19, Fig. 6 (Cancelled), vertically slidable in guides and connected to a spring 23 which engages between the belt 9 and the pulley 10. The pulleys 10 are operated pneumatically, a motor and air-pump 29 supplying pressure to a conduit 38, which may act as an adjustable reservoir, and a valve 39 admitting air automatically at intervals to cylinders 52. The valve 39 contains a spring-pressed seating, on a portion only of which the pressure is exerted before the valve is opened, after which the air acting on the whole of the seating keeps the valve open till the pressure is considerably reduced. Each cylinder 52 contains a piston 53 to which is attached a wire which passes round a pulley, by which it is gripped, and is connected to a long helical spring which serves to return the pulley and the piston 53 to their original positions when the charge of air has leaked past the pistons 53. To the pulley is fixed a ratchet wheel which engages a pawl on a surrounding sleeve carrying a pin to which is fixed the outer end of a spiral spring the inner end of which is attached to the pulley 10. The pin directly turns the pulley 10 by contact with a rubber stud thereon, and when the pin is stopped by a brake actuated by a bead on the wire the pulley, together with the belts 9 and roller 6 continue their motion by inertia, against the action of the spiral spring, till stopped by a second stud engaging the pin. The spiral spring then returns the pulley 10 and belt 9 through part of a revolution, thus returning the springs 19 and 23 again to their lower position. In a modification the sheets are displayed on both sides of the apparatus. This subject-matter does. not appear in the Specification as accepted.