Patent GB-189801214-A (GB)
Title: Improvements in Machines for Printing Floor-cloth, Linoleum, and the like.
Inventor: SCOTT CHARLES HERBERT
Filed: 1898-01-15
Granted: 1898-12-23
Abstract: 1214. Scott, C. H. Jan. 15. Printing fabrics. - The printing-blocks 4 of a machine for printing floorcloth, linoleum, and the like are supported by trunnions 6 passing through rotary blocks 6<a>, Fig. 3, which are fitted within slides 7, supported by springs 10, fitted within tubes secured to the framing. Beneath each block is a transverse beam 11, supported by springs 12, and reciprocated vertically by c a m s 14, mounted on longitudinal shafts 15. Links 16 are secured to the trunnions 6 and are provided with adjustable pins 16<a> adapted to strike against adjustable pins 11<a> secured to the beams 11. When the links 16 are vertical, as shown in Fig. 1, the printing-blocks move in unison with the beams 11, but when thrown out of the vertical by means of handlevers 17, the blocks will remain at rest. During the descent of any printing-block one of its corners may be first brought into contact with the material by causing one end of the block to descend slightly in advance of the opposite end and by slightly rotating the trunnions. These operations are effected by setting one cam 14 in advance of the other, and by fixing to one of the trunnions a rod 6<a> passing through a fixed guide-block 6<b> and formed with a reduced part 6<c> which allows the rod 6<a> to be slightly oscillated when the reduced part enters the guide-block 6<b>; this oscillation of the rod 6<a> is obtained by means of a roller 6<d> carried by a bracket 6<e>. The levers 17 have extensions 17<a> which can be thrown into or out of engagement with sleeves 30 mounted upon a reciprocating rod 31, actuated by means of a cam or other suitable mechanism. When one of the levers is thrown into engagement with its sleeve the corresponding printing-block becomes disconnected from the beam 11 beneath the block. Colour is supplied to the blocks by rollers 18<a> mounted in colour boxes 18, connected to rods 20 which are reciprocated by cams and arrangements of links and levers. The boxes 18 are connected to the rods 20 by disengaging-mechanisms which act automatically to disconnect the boxes when the printing-blocks are accidentally out of the correct position for receiving colour. The momentum lost by the colour boxes as they approach the end of a stroke is stored up by means of spiral springs acting as accumulators, and is imparted to the boxes when making their return strokes. Any printing-block that is to remain idle is prevented from receiving colour by means of stops 34 attached to the standards 9 and formed with stepped surfaces 34<a>, 31<b> ; the upper ends of the corresponding rods 16 bear against the upper step 34<b> when the rods are turned out of the vertical, and thus allow the springs 10 to lift the printing-block out of contact with the colour roller. The stops 34 may be adjusted by means of screws 34<c> and handwheels 34<d>. The colour troughs may be made of sheet metal, and the colour rollers may be driven by adjustable rollers covered with india-rubber or other soft substance and bearing against wheels mounted on the colour-roller shafts, and against the machine bed 2. Superfluous colour is removed from the colour rollers by doctors which may be slightly curved and thin steel bars the ends of which are attached to adjusting-screws. The material may be fed intermittently by a ratchet-wheel 39<a >actuated by the pawl 39, lever 38, link 37, lever 36, and cam 35 ; the pawl 39 may be held out of contact with the ratchet-wheel by the link 42<a>, lever 42, link 41, lever 40, and cam 35<a>, when a part of the floorcloth, linoleum, or other material is to receive two successive impressions from one or more printing-blocks.