Patent GB-190929827-A (GB)
Title: Improvements in Fabric Printing Machines.
Inventor: SANDERSON JOHN GLASGOW
IPC: B41F17/00
Filed: 1909-12-21
Granted: 1910-07-14
Abstract: 29,827. Sanderson, J. G. Dec. 21. Rotary machines; tripping - arrangements.-A machine for printing scarves, sarees, &c. in which the printing-rollers are forced in and out of printing position at predetermined intervals, is constructed so that the intervals are controlled by a rod which is moved to raise cam tappets adapted to control the printing-rollers arranged round the drum, the rod being actuated at intervals which can be altered by the attendant during the running of the machine. Two cam-wheels n<1>, n<2>, Figs. 1 and 2, provided at opposite sides of the impression cylinder, carry tappets n<3>, certain of which are raised to trip the first six or cross-border printing-rollers a' or the second six or body rollers a<12> by means of two or three levers k<6>, k<8>, k<10> ; these levers are pivoted to blocks carried by a graduated crescentshaped bar l<4>, which is reciprocated by a quadrant gear l<8> and link mechanism from the same shaft k<5> that actuates the levers k<6>, k<8>, k<10>, in order to cause the lever supports to have a similar motion to the tappet wheels when the tappets are being raised. The levers k<6>, k<8>, k<10> may be set in various positions, and may be of various sizes, and they are provided with spring-controlled catches which engage levers on the pivoted tappets to raise them. The shaft k<5> is actuated from a shaft j<2>, which is actuated at the required time by mechanism controlled from a bar d<4>. This bar is moved in one direction or the other by means of a reciprocating lug d<5>, Fig. 1, carried by a twin-nut d<5a>, Fig. 5, which is carried by a guide-rod d<3> and alternately engages threads on rotating shafts d<1>, d<2>. For this purpose the rod d<3> is oscillated when the lug d<5> engages one of a set of levers d<8> carried by the bar d<4>, the particular lever engaged being raised by the attendant and being marked to represent a certain interval. The motion of bar d' is transmitted by means of lever mechanism to the rod d3, and also by lever mechanism to a rod h<7> which is connected to a sleeve j<1> keyed to the shaft j<2>. The sleeve j<1> is thus moved so that a roller on it is brought into the path of a cam j<4> on a shaft j<6> driven from a gearwheel c'. The cam j<4> thus rotates the shaft j<2>, and projections on the cam return the sleeve j<1> to its inoperative position. The shafts d<1>, d<2> may be replaced by a single threaded shaft the motion of which is automatically reversed by a swinging frame on the shaft d<3> which carries wheels adapted to reverse the direction of motion of the threaded shaft, and the levers d<8> may be replaced by a nut carried by a threaded rod d<4> which is rotated to adjust the nut by gearing provided with a dial indicator to assist the setting. The raised tappets are formed with two projecting parts n<5>, n7, Figs. 14 and 16, in different planes, which are adapted to move the printing-rollers out of and into printing position respectively. As shown in Fig. 14, a roller o<3> carried by a radially movable slide o<13> is in such a position that it allows the printing-roller o<14> to be in printing position. A raised tappet n<5> acts on a laterally adjustable campiece o' carried by the slide o<13>, and forces the slide into the position shown in Fig. 16, and the printing-roller is out of printing position. It is held in this position by a spring-controlled lever o<4>, and this lever is returned to the position shown in Fig. 14 by the action of the tappet n<7> on an adjustable pin o' carried by a link o<8> connected by a bell-crank o'‹ and link o<11> to the lever o<4>. The link o<8> is also pivoted to a link o<9> carried by a cappiece o<15>, which covers the guide in which the slide o<13> works. The cam o' and lever o<4> may be replaced by a bell-crank lever p<1> and link p<2> as shown in Fig. 22, and the pin o<7> may be replaced by a pivoted catch r<2> held by a spring r<7> in one or other of the positions shown in Figs. 24 and 25. The tappet n<7> in the first place merely shifts the catch r<2> from the position shown in Fig. 24 to that shown in Fig. 25 and the printing-roller will remain tripped until a second tappet n<7> engages the part r<5> of the catch, when the roller will be thrown into action again. The plate o<15> re-sets the catch r<2> to the position shown in Fig. 24. Normally, when one set of cross-border rollers are used, only two levers k<6>, k<8> are employed, but, when two sets of border rollers are used, three levers are employed and the three tappets raised by them act in each case respectively to move the catch r<2> to operative position to trip the members of one set of rollers and to untrip the same. The machine is arranged so that each portion of the scarf &c. is acted upon by one set of rollers only,