Patent GB-190014941-A (GB)
Title: Improvements in Machines for Printing Oil Cloth and Kindred Products.
Inventor: WIEGAND WILLIAM THOMPSON
Filed: 1900-08-21
Granted: 1900-12-01
Abstract: 14,941. Wiegand, W. T. Aug. 21. Printing fabrics.-A machine for printing oilcloth, linoleum, and similar materials is represented in cross-section in Fig. 3, and the front or feeding end of the machine is represented in longitudinal section in Fig. 2. The framing A is mounted upon rollers a, and can be moved laterally into alignment with successive series of rollers which carry the fabrics to be printed. A plate A' is mounted upon the feed-table A<1>, and has an inclined lower surface which presses the fabric against the ordinary pointed pins c<11>, carried by two endless belts B. These belts are supported by pairs of wheels C, respectively mounted upon the delivery and feeding ends of the machine ; the wheels, at the delivery end, are driven intermittently from the main shaft D, by means of pawl and ratchet mechanism, which can be thrown out of operation, when desired. The belts travel along guides B, having cover-plates for holding the belts down, and are provided with the usual projections, which enter corresponding recesses formed in the wheels C. Inking-rollers g<3> are mounted upon carriages of the usual kind, which are supported upon wheels g running upon rails g<1>; the rollers g<3> are rotated during the movements of the carriages by means of a rack g<2> and toothed gearing g<4>, g<5>, Fig. 3. Two ropes or cables H, firmly connected to the carriages by any suitable clamps I, travel upon idle wheels at the delivery end of the machine, and upon wheels h, Fig. 2, fixed to a shaft H<1> which is oscillated by means of a pinion H<2>, toothed sector H<3>, and slotted arms N, which engage successively with studs L<2>, M<2>, carried respectively by bevelwheels L, M, Fig. 4. The bevel-wheels L. M are driven in opposite directions by a bevel-wheel K on the main shaft D. The shaft H<1> passes through a chamber P, containing liquid, and carries a vane which revolves within the chamber. During the rotation of the shaft H<1>, the liquid is forced through one of two apertures along a pipe P<3>, the ends of which communicate with the chamber through the aforesaid apertures. By this means, the inking - carriages are prevented from being carried too far by reason of their momentum. In order to lock the carriages firmly during the printing operation, the liquid is prevented from flowing through the pipe P<3> by a valve fitted within a casing communicating with the pipe P<3>, and actuated by means of a spring-controlled arm R<3> and cam. The printing-blocks T are of any usual construction, and each is provided with vertical arms which slide between guide-plates T<2>. The arms are connected by links T<3> to the outer ends of pivoted levers T<4>, of which the inner ends, Fig. 3, are connected by links T<6> to the projecting arms of a follower or plate T<7>. A cam 0, keyed upon the main shaft D, bears against a stud T<9> which projects from the plate T<7>; the shaft D passes through a vertical slot formed in the plate T<7>. During the actual printing operations, the printing-blocks are pressed with great force upon the fabric by means of pins U<1>, one of which is secured to each cam O and is arranged to pass beneath a roller carried by each stud T<9>. Any desired printing-block may be held in its inoperative or raised position by an arm j<2> which engages with the upper end of the plate T<7>, and is secured to a sleeve carried loosely by a rocking and counterweighted shaft J. The sleeve engages with a collar keyed to the shaft J, and carries a second arm j<1>, which is actuated by one of a series of cam surfaces formed on a disc X ; this disc is keyed to a shaft W, which is driven from the main shaft. When the operative cam has passed the arm j<1>, the arm j<2> does not necessarily leave the plate T<7> at once, but is disengaged, at the time when the block is required to descend, by means of a swell 0' on the cam 0, which forces the stud T<9> downwards, and therefore allows the weight of the parts of the arm j<2> and connected parts to bring the arm j<2> against a stop a<1>. Any printing-block may also be permanently held in its raised position by rotating the shaft J so as to bring the counterweights over to a position on the right of the shaft.