Patent GB-190206954-A (GB)
Title: Improvements in and relating to Envelope Printing Presses.
Inventor: JOHNSTON WILLIAM GRANT
Filed: 1902-03-21
Granted: 1902-05-01
Abstract: 6954. Johnston, W. G. March 21. Platen presses; feeding sheets.-Relates to platen presses for printing envelopes. Fig. 1 shows a side elevation of the machine, and Fig 3 a section through the platen and envelope-feeding mechanism. The platen 3 is adjustably fixed, by a bolt 4 and screws 5, in vertical-position on the stationary frame 1. From the frame 1 extend horizontal bars 6, on wbich slide frames 14 carrying the type-bed 15 and inking-apparatus. The frames 14 are reciprocated by rods 13 connecting them to crank-pins 12 on wheels 10 driven by pinions 11 on a driving-shaft 8. The rods 13 are pivoted on eccentrics 17 journalled on studs 18 fixed on the frames 14. The eccentrics 17 are moved by handles 23, to adjust the impression, and are fixed, when adjusted, by-thumb-nuts 22 on rods 20 passings through the parts 21 of the frames 14 and connected to arms 19 of the eccentrics. The guide-bars 6 are connected at their ends by a crossbar 7. The inking-rollers 24 are in bearings on arms 26 pivoted at 27 to levers 28 pivoted at 29 on extensions 30 of the frames 14. The upper arms of the levers 28 are connected by rods 32 to fixed points 33 on the frame 1. The inking- rollers are held in contact with the forme and the ink disc 39 by spring rods 35 pressing the upper ends 34 of the arms 26. The ink disc 39 is journalled in a bearing 40 on the frames 14, and is intermittently rotated by ratchet mechanism 42; 44 operated by an arm 45 engaging a cam-arm 47 fixed on the cross-bar 7. The pile of envelopes 69 is placed with its front corners in vertical angleshaped guides 49 adjustable transversely on a bar 50 and fixed in position by screws 52. The. pile rests on ledges 53 on the guides 49. A rear guide 58 is fixed on a transverse bar 57 carried by brackets 55 adjustably fixed on bars 54 extending from the angle-guides 49. On the lower end of the guide 58 is a projecting ledge 59 for. supporting the rear part of the pile 69. Extending rearwards from the frames 1 are two guide-bars 60, on which are slides 61 reciprocated oy rods 63 connecting them to the frames 14. The slides 61 are connected by a cross-bar 70, from which project two thin spring blades 71. When the slides move forwards, the blades 71 engage the flap of the bottom envelope, and move this envelope forwards to a pair of constantly-driven feed-rollers 64, 65, by which the envelope is fed under curved guides 72 to guides 73 on the side edges of the platen. The rollers 64, 65 may be covered with rubber &c. ; or the roller 65 may be grooved for rubber rings 65<a>. Bars 76 prevent more than one envelope from being fed at a time. These bars slide vertically in guides 75 on the guides 49, and their lower bevelled ends 77 are pressed down on to the ledges 53 by springs 79. The upward movement of the bars 75 is limited by adjusting-screws 80. The envelope drops, with its side edges engaging the guides 73, on to two fingers or stops 74, and, after the impression, these fingers are pressed apart, to allow the envelope to drop down away from the platen. The fingers 74 are fixed one on each of the rods 87, 88, and these rods are moved longitudinally in opposite directions by a rocking-lever 85 on a shaft 84 operated by a cam on one of the wheels 10.