Patent GB-132871-A (GB)
IPC: B41K3/48
Abstract: 132,871. Nash, S., (Hall-Welter Co.). Sept. 24, 1918. Index type-wheel machines for perforating paper.-Relates to a machine for filling in cheques, drafts, &c., of the kind in which the types are adapted to break the paper throughout the printed surface and to force ink into the ruptured fibres, and comprises a type-wheel which slides for impression and is associated with a full-stroke device, a stripper for preventing the cheque from adhering to the types, and a variable-feed device for the cheque. (1) The type-wheel 35, having type-bars 40 for printing words, characters. &c., is mounted in a vertically movable yoke 18 which is depressed for impression against a platen 46 by rocking a hand-lever 25. The yoke is guided by slots 15 in the frame member 7 and is prevented from moving laterally by plates 31, 32. The yoke is connected by a link 21 to a rod 26 secured to arms 22 on the spindle 24 of the hand-lever, a returning-spring 27 being arranged on the spindle. To facilitate manipulation, the hand-lever is formed with a thumb-piece 29 as well as a handle 30. The shaft 33 of the type-lever is provided with a setting- knob 38, having an index-ring 36 which is arranged under a pointer 39. (2) The full-stroke device for preventing the type-wheel from being given an incomplete up-stroke or down-stroke, consists of a rack 122, Fig. 28, on the yoke 18 cooperating with a dog 123 formed on a disk 124 which is pivoted on a pin 125 and connected to a spring 131. The pin 125 is secured to a vertically adjustable plate. (3) The cheque is prevented from adhering to the types by a stripper 85, Figs. 5 and 6, secured to the yoke 18. The stripper comprises two arms of thin metal which are spaced apart to permit of the passage of a typebar 40, and are set at a slight inclination to the horizontal. In the up-stroke of the type-wheel, the arms hold the cheque resiliently until the type-wheel moves clear of the platen. Alining for impression -The type-wheel is formed with teeth 41, Figs. 5 and 6, separated by slots which engage a stationary alining-tooth 43 when the type-wheel is depressed for impression. The type-wheel is normally locked by the engagement with the teeth 41 of a spring plunger 42 mounted in the yoke 18. Roller inking-arrangements. - The types are inked by rollers 56, Fig. 6, mounted on pivoted brackets 57 which are pressed inwards by springs 61 and are moved outwards during the downstroke of the type-wheel. The brackets are pivoted on plates 60 which are detachably secured to the frame part 7. Paper-supports; types; pad inking-arrangements.-The platen 46, Figs. 5 and 6, and the types 40 are formed with interfitting projections, such as points or ridges. adapted to perforate or rupture the cheque throughout the printed area. As shown, the platen 46 is formed with a. recess which receives an inking-pad 47 for inking the bottom of the cheque, and is crossed by a number of parallel wires 48 registering with grooves in the type. The platen is arranged in a slotted lug 14 on the base 1, and is provided with a securing- screw 55 and with screws 53. 54 for vertical and horizontal adjustment. Sheet feeding and guiding arrangements.-The cheque is placed on the top plate 11 of the base 1 and is fed by co-operating rollers 12, 69, the rollers 12 being operated by variable-spacing mechanism, described below The rollers 69 are carried by a vertically movable plate 70, Figs. 5 and 6, which is pressed downwards by a spring 76 in connexion with a key 72 for lifting the plate. Cheques and the like are guided by the engagement of the top edge with lugs 83 on a plate 81 adjustable by turning a knob 80 which is provided with a pinion 77 engaging holes in the plate. In dealing with wide sheets, they are allowed to curl up in the space between the frame parts 5, 7. Letter-spacing mechanism.-The cheque is fed the length of a word plus a space, after each impression, by the following mechanism. A member 92, Fig. 7, which can slide on the yoke 18, is formed with a lug 90 in the path of a stepped member 113 on the type wheel, the steps being each associated with a type-bar and of different heights so as to afford, with respect to the lug 90. amounts of lost motion that are inversely proportional to the lengths of the associated type-bars. The member 92 is carried by a lever 93 having a slot connexion 95 with a link 97 which pivotally carries a. link 101 having teeth engaging a ratchetwheel 103 on the shaft 66 of the feed-rollers 12. The links 97,-101 pass through guide-slots in a plate 99, and are connected by a spring 104. A spring 110 on the pivot 94 of the lever 93 normally holds the member 92 in the raised position and the links 97, 101 in the depressed position; in this position, a lug 107 on the link 97 engages a stop-screw 108 and the link 101 engages a plate 116. Each time the type-wheel is depressed for impression, the link 101 is retracted idly a distance corresponding to the length of the active type-bar, and, in the up-stroke of the type-wheel. the link 101 rotates the ratchet-wheel. The space' between words can be adjusted by adjusting the stop 108 and bending the plate 116. The slot connexion 95 allows the stripper 85, described above, to detach the cheque before the feed is effected.