Patent GB-239212-A (GB)
Title: Improvements in wall paper printing machines
IPC: B41F17/00
Filed: 1925-08-26
Abstract: 239,212. Anquetin, J. Sept. 1, 1924, [Convention date]. Addition to 221,488. No Patent granted (Sealing fee not paid). Platen machines.-In a modified arrangement of the machine described in the parent Specification for printing coloured designs on a number of webs of wall paper, and in which the webs are drawn intermittently over a printing-table 102, Fig. 3. and are printed by plates mounted in a frame 127 carried by levers 122 which swing the frame to and fro between the printing table and an inking-pad 104, the printing-plates are mounted on a triangular prism 144 which is rotated in the frame 127 at each swing of the levers 122, so that designs longer than each separate plate can be printed on the web. The trunnions 126 of the frame 127 are slidably mounted in slots 124 in the levers 122 and are forced outwardly by springs 128. A cable 130 passing over a pulley 129 on each trunnion 126 and over a fixed pulley 131 serves to keep the frame 127 horizontal as it swings to and from the ink-pad 104. Rollers 132 on the frame 127 bear against an adjustable abutment 134 and a movable abutment 135 and guide the frame as it descends on to the printing-bed 102 and inking-pad 104 respectively. The shaft 120 carrying the levers 122 is oscillated by a cable which passes over a pulley 118 thereon and whose ends are attached to a pivoted member 113 having rollers 114 in engagement with a double cam 111. A sinuous part on the cam causes the printing- plates to strike the inking-pad several times, and at the same time the abutment 135 is being moved by an eccentric and connecting-rod 138 so that, under the action of the springs 128, the plate strikes the pad in a different spot each time. The prism 144 is held in either of its three printing positions by a spring-pressed pawl and is rotated by pawl mechanism at each swing of the levers 122. The frame 127 is raised obliquely from the printing-bed 102 by the engagement of a spring pawl 177 thereon with a projection on the machine frame. Inking-apparatus. - In the inking-apparatus described in the parent Specification, the reservoir 168, Fig. 3, from which the felt pad 104 is supplied with ink by means of a brush 254, is provided with a closed chamber 167 at one end in which stirring-vanes 169 oscillate. A trough 171 around the pad 104 serves to collect any exoess ink. Set-off, preventing; drying-apparatus.-According to the Specification as open to inspection under Sect. 91 (3) (a), the web is fed from a roll 172, Fig. 3, by means of spiked wheels 175, 233, as described in the parent Specification, driven through ratchet gear from a pulley 218 over which passes a cable 219 connected by springs 221 to a lever 222 oscillated from the shaft 120 by a belt 224. A roller 236 strips the web from the spikes and the web passes without tension to drying-apparatus comprising a large number of cylinders 176, Fig. 5 (Cancelled), mounted on radial arms of frames 201, at the centre of which is a winding-drum 179 actuated by a slip drive, the apparatus being enclosed in a room provided with radiators and fans. A pulley 184 freely mounted on the shaft 183 of the drum 179, is driven from the wheels 175, and through chain and sprocketwheel gearing drives the rollers 176 at the same speed as the web. The shaft 183 is driven from the pulley 184 by spring-pressed balls 186 engaging notches therein. The web is slightly stretched by a series of rollers 195 freely mounted in the frames 201, the rollers being raised to relieve the tension by a cable 198 and lever 199. For printing the web in a second colour, the web may be rewound on a bobbin 244, Fig. 3, and when finally completed, may be rewound on its original spindle 172. This subject-matter does not appear in the Specification as accepted.