Patent GB-625170-A (GB)
Title: Block-printing machine for textiles
IPC: B41F1/10
Filed: 1947-01-09
Abstract: 625,170. Printing- machines. COLAH, H. K. Jan. 9, 1947, No. 757. Convention date, Jan. 16, 1946. [Class 100 (ii)] A block-printing machine, which is especially applicable for printing the borders of sarees, is constructed with a conveyer belt 74 passing over rollers 73, Figs. 24, and 25, for advancing the sarees intermittently, and with a blockholder 31, 31A, which is lowered to effect the printing while the conveyer is at rest, and after the printing operation the holder 31, 31A is first raised and is then swung about a vertical axis so as to bring the block over an inking pad 51, and then the holder is lowered to effect inking of the block, and finally the holder is raised and swung to a position over the conveyer 74 which has in the meantime advanced a new saree, or a new length of a long saree, into position under the type-holder. Small rollers 75 keep the belt 74 pressed against the rollers 73. All operations are controlled by a master control device, Fig. 8 (not shown), driven by bevel gears 4, 1A operated by a motor 2 or manually, comprising a crank-pin 8 for reciprocating a link 7 which controls the swinging movement of the type-holder, and cams 1B, 1C, 1X for controlling other operations. A raised part of cam 1B controls the raising and lowering of the holder 31, 31A which is pivoted about upright supports 28 carried by a base having a gear segment 27 which is engaged by a reciprocating rack 25 operated by the link 7 through a lost-motion connection which ensures correct registration of the holder 31, 31A over the conveyer and over the inking device. The cam 1B operates roller 13 on a lever 14 which via a link 20, lever 41 and link 43 moves the holder 31, 31A from the position shown in Fig. 24 to a position in which the block engages the fabric. A spring 42 returns the holder to raised position, and then the rack is moved to cause the swinging movement of the type-holder. The conveyer belt 74 is advanced between the printing operations by reciprocating gripper members 55, 55A, mounted on a carriage 58 which moves over rails 60, 60A, having flanges engaged by guide rollers 59, 60 and 59A, 60A. The carriage 58 is operated by a cable 38 adjustably connected to a bracket 32 on the type-holder, which withdraws the carriage 58 as the holder swings towards the inking device. The cable passes over guide pulleys 39, 40 and is connected to a hook on the carriage, and is connected to a spring 35 which effects return movement of the carriage. The grippers 55, 55A are arranged to engage the undersides of the inside of the conveyer and may be formed with pointed ends to dig into the material of the conveyer while advancing it, or may be fitted with electromagnets 55X, 55X<SP>1</SP>, Fig. 29, adapted to engage narrow iron bars secured to the inside edges of the conveyer as in Fig. 30 (not shown). The conveyer is arranged to move the fabric from printing position after an impression is made, and then it makes a return movement while the fabric is not gripped by the grippers. With the arrangement of Fig. 29 the electromagnets 55X, 55X<SP>1</SP> are energized under control of a switch 185 the control lever of which is operated by a cam 1X on the control member. In place of the electromagnets 55X, 55X<SP>1</SP> suction devices may be used which are brought into contact with the conveyer by the arms 55, 55A and the air pressure of the suction devices is controlled by a valve operated by an electromagnet which is energized by a switch operated by the cam 1X. Multi-colour printing may be effected by fitting more than one printing- block in the holder, and arranging these to be inked by inking-devices of different colour.