Patent GB-571135-A (GB)
Title: Improvements in addressing or like printing machines
IPC: B41L47/24
Filed: 1944-01-19
Abstract: 571,135. Addressing-machines. ADREMA, Ltd., SANDERSON, T. E. F., and MOON, W. R. H. Jan. 19, 1944, No. 1019. [Class 100 (ii)] An addressing or similar printing-machine of the kind in which the printing head is provided with two pads which co-operate on alternate actuations of the head with different portions of the printing-plate acting upon separate columns of the printed sheet so as to effect double listing, is constructed with list feeding mechanism which gives the sheet a diagonal movement between the printing of the first and second list, and then a return diagonal movement after the list is advanced for a further set of impressions. The list is carried by a gripper adjustably secured to a bar 15 supported and actuated by mechanism carried by a channel-section metal body 7, Fig. 3, or by a casing 20, Figs. 5, 7, adapted to slide on a channel member 3 under control of a rack 4 which effects the normal longitudinal movement of the list. The diagonal movement of the gripper bar 15 is obtained from a ratchet wheel 26, oscillated by the movement of the printing head and adapted by an adjustable crank mechanism 25, 29 and connecting-rod 22 to reciprocate a slide 21 moving on a guide-bar 19. The slide 21 is fitted with a device for giving a larger reciprocating motion to a T-shaped guide member 16 which can slide on the bar 19 and is formed with a guide 17 for the gripper bar 15 which is pivoted by a pin 14 to a slide member 13 which moves transversely with the guide member 16, and is constrained to move upon an angularly set guide bar 9 which causes the bar 15 to move diagonally. The bar 9 can be set at the required angle about a pivot 10, and is held in adjusted position by a screw 11 moving in an arcuate slot, and a nut engaging the screw. The means for multiplying the motion of the slide 21 comprises a belt 32 passing over pulleys 33 and having ends secured to the casing or support by an anchoring-device 34. The belt is connected by a pin 38 to an extension 37 of the guide member 16. As shown in Fig. 7 the casing 20 is fitted with scales 59, 56 for indicating the position of the guide 16 and the angular adjustment of the bar 9 respectively. The means for actuating the ratchet 26 from the printing head is shown diagrammatically in Fig. 11, and comprises an oscillating segment 50 actuated by crank arm 47 and gearing 48 from the printing head, the ratchet being rotated a half. revolution at each upward movement of the printing head so as to effect' transverse movements of the carriage 21 in opposite directions during each upward movement of the head. To limit the longitudinal movement of the list to each alternate movement of the head a second ratchet 68 operates a cam 69 which operates trip mechanism to trip a pawl 67 connecting the casing 20 and associated parts to the rack 4 which is advanced at each movement of the head. To convert the list feed to a single feed the mechanism which trips the pawl 67 can be put out of action, by tripping the pawl 70 by means of a plunger 88, Fig. 7. The crank mechanism associated with the ratchet 16 can be set so as to cut out the operation of the means for moving the list transversely. This is effected by adjusting the crank pin in the slotted arm 29 to which the pawl 30 is pivoted so that it is concentric to the ratchet 26. The cam 69 can be operated by hand-wheel 62 so as to release the casing 20 when it is desired to set the list gripper to a desired position. Specification 569,870 is referred to in the Provisional Specification.