Patent GB-356158-A (GB)
Title: Improvements in rotary hand printing stamps
IPC: B41K1/24
Filed: 1930-06-02
Abstract: 356,158. Hand-printing stamps. CLARKE, C. H., 24, Hermon Hill, Wanstead, London.-(Laurent de la Ville le Roulx, R. L. J. ; 1, Avenue du President Wilson, Paris.) June 2, 1930, No. 16989. [Class 100 (ii).] Rotary machines.-In a rotary hand-printing stamp having a printing-roller whose spindle is operatively connected by means of gearing to a rack or the like for preventing slipping of the roller on the surface to be printed, the backward and forward movement of the roller is effected bv pressing down a handle which operates a rocker in either direction alternately. The printing roller 1, Fig. 1, and a gear-wheel 2 are secured to a shaft rotatably mounted in a frame comprising side plates 5, 6 which are cross-braced by tie-rods, one of the tie-rods 7 terminating in trunnions 8 adapted to slide and rotate in slots 10 in side plates 12, 13 which comprise the main framework of the machine. A stationary toothed sector 18 pivotally mounted on and concentric with one of the trunnions 8, and which is prevented from turning by a stud 19 secured to the frame-plate 13 and entering a slot 20 in the sector, engages with an intermediate gear wheel 21 which is carried by the roller frame 5, 6 and meshes with the gear wheel 2. When the roller frame 5, 6 is swung from one side of the main frame to the other in either direction the printing roller 1 is rotated. The slots 10 permit the roller frame 5, 6 and toothed sector 18 to rise and fall together with respect to the main frame to allow the printing-roller axis to travel parallel with the surface to be printed. An operating handle 25, Fig. 2, is guided vertically by studs carried by the handle working in slots 22, 23, 24 in the main frame. A guide stud 26 acts as a pivot for a double pawl member 27 having detents 28, 29, and the pawl is normally retained in a central position by a leaf spring 30 fixed to the handle 25 and lying between pins 31, 32 on the pawl. A cross shaft 33 pivoted in the main frame plates 12, 13 carries a rocking lever 34 having studs 35, 36, and two arms 37, 38, Figs. 1 and 2, each terminated by a fork engaging a stud fastened to each roller frame plate. When the handle 25 is depressed, the detent 29 of the pawl 27 engages with the stud 36 on the lever 34 and rocks the lever 34, which in turn drives the roller frame 5, 6; when the handle 25 is raised the pawl 27 is deflected by the stud 35 and regains its central position with detent 28 in line with the stud 35. A second depression of the handle 25 will cause the above operations to be repeated on the other side of the pawl 27, and the roller frame 5, 6 will be swung back again. Hooks formed in the edges of the side plates 5, 6 engage cross-ties 16, 17 under bias of a leaf spring to hold the roller frame at either end of its travel when the machine is lifted from the surface to be printed. In a modification, shown in Fig. 20, instead of a fixed sector, a travelling rack is employed to rotate the roller. The printing-roller 1 and its gear 2 are mounted on a travelling carriage 56 which is connected by a link 57 pivoted on a rocking-lever 59, 61, pivoted to the main frame at 60, and connected by a link 63 to a swinging arm 37 on the rocker 34. A rack 64 is provided with slots which engage with pins on the carriage 56 and is adapted to move in the opposite direction to the printing-roller 1. A handle 69 adapted to slide on a tube 70 is secured to a stem 71 sliding within the tube. The lower end of the stem 71 carries lugs on which are pivoted pawls 73, 73<1> interconnected by a link 74 and retained centrally by a spring 75. On depression of the handle 69, the pawls 73, 73<1> engage studs 35, 36 of the rocker 34. In another modification the intermediate gear is dispensed with and the rack is driven direct by the arm of the rocker, the printing-roller being driven by the rocker through levers. The ink is contained in a hollow perforated roller 39, Fig. 1, covered with felt 40, and is transferred to the printing-roller 1 by two rubber rollers 41, 42 ; a spring is adapted to press the roller 39 into engagement with the roller 41, which in turn presses the roller 42 on the printing-roller 1. Counting-apparatus. The side plate 5, Fig. 14, of the roller frame is extended upwardly and terminates in a fork 44 which engages with a stud 45 carried by a plate 46, the latter having slots 49, 50 which engage with pins 47, 48. Lugs bent over from the plate 46 are adapted to engage a ratchet wheel 53 on opposite sides of its centre to move the ratchet wheel one unit in the same direction at each semi-oscillation of the roller frame. In a modification a toothed sector 76, Fig. 20, is formed on the edge of the rocker 34 on which engages a pinion 77 on a shaft 78. An eccentric or the like 79, Fig. 21, mounted on the shaft 78 operates the counter by a lever and pawl member 81.