Patent GB-423758-A (GB)
Title: Improvements in or relating to printing machines
IPC: B41F1/06
Filed: 1933-11-30
Abstract: 423,758. Printing-machines. ARMELIN, E. R., BRIGHTWELL, H. E., and PLASKETT, A. F. G., Riverside Works, Standish Road, Hammersmith, London. Nov. 30, 1933, No. 33631. [Class 100 (ii)] A printing-machine of the kind in which the type or die is mounted in a carrier 15 which is given an orbital movement, and in which the type remains parallel to the surface being printed and co-operates with a platen reciprocating in the plane of the web, is constructed so that the type holder 17 is given an additional reciprocating movement relatively to its holder 15 so that an impression of greater length can be produced. The extent of the additional movement may be varied, and it may be adjusted so as to be contrary to the direction of movement of the carrier. The platen may be formed of convex section and be rocked in the line of travel of the web, thereby reducing the power required for the impression. The movements of the machine are derived from a shaft 3 which is driven by gearing 2, 5 from a main shaft 1 which also drives rotary printing-couples with which the machine may co-operate. The holder 15 is given its orbital movement by means of two pairs of crank-arms 10 on shafts 9 driven by a gear 6 on the shaft 3. The arms 10 of one pair are connected by a fixed transverse spindle 11 which is received in a bearing in the holder 15, and the other pair of arms is fitted with independent spindles 12 which in addition to giving the orbital movement are adapted to give an adjustable reciprocating movement to a connecting-rod 22, and this movement is amplified by means of a lever 20 to which it is pivoted. Crank discs 14 are secured to the spindles 12 and the connecting- rod 22 is secured in an adjustable position to slots in the discs 14. The platen 26 is reciprocated in guides 39, Fig. 2, by means of a crank disc 34 on a shaft 27 driven from the shaft 1. A connecting-rod 28 is adjustably connected to the disc 34 and by a lever 29 and link 37 transmits the motion from the crank 34, and the platen runs on rollers 40<a>. The printing-pressure is controlled by screws 41 which move the table supports on inclined guides 41<a> in the machine base. In a modification, Fig. 5, the platen 26 is given a rocking motion by supporting the table by rollers 65 which move on lower curved guides 67, an upper curved guide 66 engaging a central pair of rollers 65. The curved guides are formed in angularly adjustable side members 67<a>, and a curved impression plate 79 is fitted to the platen table 26. The printing-surface is inked by rollers 44 fitted with a distributing-roller 44<a> carried by spring-controlled bogies 45 which are carried around a distributing table 63 by means of rotating arms 50 carried by a hub 46 driven from the crank gears 7. The bogies are controlled by guide tracks 42, 42<a> arranged to engage lifts 43 on the shafts of the rollers 44. The profile of the tracks 42, 42<a> differ where the curved parts run into the open part so that both the leading and the trailing rollers 44 run on to the type smoothly. The table 63 is reciprocated transversely by a cam 60 on the shaft 3, and it is supplied with ink from a fountain roller by a roller 55 which is oscillated in cam tracks 57 by means of a crank arm 58 and connecting-rods 56.