Patent GB-357307-A (GB)
Title: Improvements in apparatus for collecting printed sheets
IPC: B65H29/00
Filed: 1930-07-08
Abstract: 357,307. Printing-machines. BARKER, R. W., 56, Ludgate Hill, London. -(American Bank Note Co. ; 70, Broad Street, New York, U.S.A.) July 8, 1930, No. 20677. [Classes 100 (i) and 100 (ii).] Set-off, preventing; ; delivery apparatus; feeding webs.-Printed sheets which, on delivery from the printing-machine, are wound up in the convolutions of a continuous web of paraffin paper, are separated from the reel of paper and deposited in a pile on a delivery table by mechanism comprising bearings for the supply reel and also for a reel on which the web is rewound, and guide rollers whereby different parts of the web form parallel reaches within which the sheets are carried and delivered. The web from the supply reel 12, Fig. 5, passes between rollers 20, 24, over a roller 21 and back over the outside of the roller 24. It is then passed around the reel 12 between the rollers 20, 24 and over a roller 22 before being guided by rollers 25 to a rewinding reel 30. The printed sheets leave the reel between the parallel reaches 13a, 13b, 13c with their printed faces against and lightly adhering to the parts 13a, 13b. As they pass between the rollers 20, 24 the adhesion is lessened and is broken by the sharp turn given to the web by the roller 21 so that the sheets pass to delivery bands 23, 46 which deposit them printedside up on a table 47, Fig. 1, A stripper-bar 79 is provided adjacent to the roller 21 to ensure that the sheets are separated from the web. Adjustable rollers 80, 81 press the bands 23, 46 against the roller 21, the roller 80 being carried by an arm 83 held in position by a cam plate 85 which can be swivelled so as to permit lowering the belt 23 and facilitate the initial threading of the web over the roller 21. The spindles 29 of the rewind reel 30 are slidable in elongated bearings 28 and the reel rests on friction rollers 32, 33 driven by a gear train 34 and belt 36 from an electric motor 26. A weighted band brake 38 is provided for the roller 32 to prevent overrunning when the power is cut off. Resting on the top of the reel 30 is a weighted roller 31 having its bearings mounted in the bearings 28 and carried by chains 39 adapted to be operated from a hand-crank 44 through gearing 41, 42, 43 when it is desired to raise the roller 31. A pair of web-feeding rollers 45 positively driven from the gears 34 are provided adjacent to the rewind roll 30 to ensure that the web is drawn off the reel 12 at a constant rate. One or more of the guide rolls 25 are mounted in downwardly-open bearings so that their weight keeps the web taut. A rotary slitter 78 is associated with the rollers 45 to remove irregularities in the edge of the web due to lateral stretching. A foot-pedal 71 is provided to operate a throw-out switch 73 for the motor and simultaneously operates through a link 76 and spring-pressed lever 77 a brake shoe 17 acting on a drum 16 attached to the reel 12. The brake shoe 17 may be operated independently by a hand-lever 19. The delivery table 47 has adjustable side and back gauges 49, 48 respectively and is supported by links 50, 51 pivoted to cranks 52, 53 on shafts 54, 55. Descent of the table by gravity is prevented by a cable 64 connected thereto and to springs 62. A frame 65 carrying the shaft 54 is pivoted about the shaft 55, its free end being connected to a flexible member 66 adapted to be acted upon by a winch 67 through a hand-crank 70 and gearing 68, 69 to adjust the inclination of the table. The shafts 54, 55 are coupled by a rack 58 and toothed sectors 56, 57 and can be rotated by a hand-wheel 61 through worm gearing 59 to turn the cranks 52, 53 and raise or lower the table 47.