GB1255681A - Paper feed system for accounting machines - Google Patents

Abstract

1,255,681. Selective printing. ING. C. OLIVETTI & CO. SpA. 1 Jan., 1969 [18 Jan., 1968], No. 140/69. Heading B6F. In an accounting or like selective printing machine, a paper tally strip 31, Fig. 1, is guided round a platen 23 and a strip 69-of continuous forms is guided over the strip 31, the platen 23 being driven from a feed shaft 179 and the strip 69 being fed by pin wheels 76 driven from a feed shaft 277, the strips 31 and 69 being independently fed, and a continuously driven motor shaft 239, Fig. 5, is couplable to either or both shafts 179, 277 through a respective presettable clutch 181, 273 and an intermediate actuating clutch 234 under the control of programmed operating means (145), Fig. 11 (not shown). Line feed mechanism.-For line feed of the tally strip 31, the programmed operating means (145, Fig. 11) de-energizes a start electromagnet (157) to engage a start clutch 147, Fig. 5, and energizes a presetting electromagnet (138) to pre-select engagement of the presettable clutch 181. The engagement of the clutch 147 transmits drive from the motor shaft 239 to a shaft 146 which urges an armature (139), Fig. 6 (not shown), into a held position against the preenergized electromagnet (138) and initiates engagement of the clutch 181. At the end of a first revolution of the shaft 146, a switch (270, Fig. 11) is closed, re-energizing the start electromagnet (157) and energizing an actuating electromagnet (208) which acts to engage the actuating clutch 234 to couple the drive shaft 239, through a common shaft 187 and the clutch 181, to the platen drive shaft 179. After a line feed rotation of the platen 23, the actuating clutch 234 is disengaged. Line feed of the strip 69 by the pin wheels 76 is achieved in a similar manner by energization of a second presetting electromagnet (272) controlling the corresponding presettable clutch 273. Multiple web arrangements.-A second platen 24, Fig. 1, is provided, which may drive a second tally strip (not shown), and a second strip 71 of continuous forms is fed by pin wheels 83. The platen 24 and pin wheels 83 may be line fed in the same manner as the platen 23 and pin wheels 76 through corresponding presettable clutches 197, 286 driving respective shafts 198, 289. Long feed arrangements.-The actuating clutch 234 may be held engaged for a period controlled by the programmed operating means (145, Fig. 11) in response to a programme tape reader (327 or 328), an electromagnet (297), Figs. 11 and 8 (not shown), being energized to prevent disengagement of the actuating clutch 234 until required by the programme. Web feeding and guiding arrangements.-The strips 69, 71 are held against their respective platen 23, 24 by rollers 101, Fig. 1, which are swung away from the platen when the strips are to be fed by their respective pin wheels 76, 83. Additional rollers (36, 37), Fig. 2 (not shown), hold the tally strips 31 against the platens, and may be swung away manually by a lever 38, Fig. 1, for introducing tally strips into the machine. The tally strips 31 are laterally guided by movable side guides 32. Print head.-A travelling print head 124 having type wheels 126 co-operates with the platens 23, 24.