Patent GB-189914991-A (GB)
Title: Improvements in Means for Wiping or Removing Superfluous Ink from the Dies of Printing Presses.
Inventor: JOHNSTON JOSEPH YARDLEY
Filed: 1899-07-20
Granted: 1900-07-20
Abstract: 14,991. Johnston, J. Y. July 20. Embossin,q a n d stamping.- Relates to means for wiping or removing superfluous ink from the dies of printing or embossing presses, such as are described in Specifications No. 16,704. A.D. 1893, and No. 14,664, A.D. 1894. The wiping-strip d of hard, smooth paper or other suitable material is stretched over a soft and elastic pad stretched between rollers beneath a table e which is supported by a frame f; this frame rests upon a spring g, and is free to slide vertically to a limited extent. An adjustable screw pin j loosely supports the centre of the table e, the level of which can be adjusted by means of four screws n, which pass through the top of the frame f and bear against springs fitted within recesses in the table e; the screws n are adjustable by means of worm-wheels o and worms p. The springs serve as yielding supports for the table c, which can oscillate about the central pin j and adjust itself to the die face. The strip d is fed from a roll securely held between conical sleeves y, which slide upon a spindle v and are secured by means of spikes x, Fig. 1, to laterallyadjustable sleeves w. Levers 1<1>, hinged to the supporting-arms Z, Fig. 2, carry blocks 1 which can be forced by screws 2 against the spindle v; after throwing back the levers 1<1>, the spindle may be removed. After the strip d has passed over the pad e, it is wound upon a collapsable roller 3, Fig. 10, comprising two semi-cylindrical halves 4, 5, hinged together at 6, and provided with filling- pieces 7 which are held in position by springs or other suitable means, and furnished with thumbpieces 9, which can be used for the purpose of displacing the pieces 7 so as to allow the roller to collapse. The roller is mounted loosely upon a spindle 10, Fig. 2, and is driven by means of friction discs, mounted upon the spindle and pressed between the ends of the hub of the wheel 3 and bushes fitted round the ends of the spindle. A feedroller 23 is mounted upon a spindle 21, and acts in conjunction with a small feed-roller 24, which is mounted in spring-controlled bearings and is formed with grooves 25, Fig. 1, filled with strips of felt or other material suitable for pressing the strip d against the roller 23. The rollers 3, 23 are actuated simultaneously by means of ratchet-wheels 35 and spring- controlled pawls 33, attached to toothed segments 31, which are oscillated by a rack bar 28. The rack bar is depressed by the action of a cam 29 on the shaft carrying the printing-die arm a, and is raised by a spring 36. The feed of the strip d can be regulated by means of a guard plate 40, which partly covers the upper ratchet-wheel 35 and is attached to a.slotted quadrant 39, adjustable upon a pin 41. Rotation of the roll 3 in the wrong direction is prevented by spring pawls 44 and ratchet teeth 43 on the roll 3. The entire wiping- apparatus is lifted, to press the strip d against the die, by means of a lever 50 pivoted about a pin 69, and carrying a roller 52 which rests upon a cam 54 formed on a disc 53 on the die-arm shaft. The height to which the wiping-apparatus is raised may be regulated by rotating a wheel 66 carried by a screw 65, which actuates a block 62, sliding beneath an inclined part 61 of the lever 50. As the strip d is drawn down by the roll 3, ink is removed from its surface by an adjustable scraper or plate 74, against which the strip may be pressed by the action of a weighted plate. Apparatus, similar to that described above, is also described in Specification No. 14,994, A.D. 1899.