Patent GB-943821-A (GB)
Title: A cash register or similar accounting machine
IPC: B41J11/46
Filed: 1962-06-19
Abstract: 943,821. Typewriters. NATIONAL CASH REGISTER CO. June 19, 1962 [Sept. 1, 1961], No. 23467/62. Heading B6F. Type-wheel machines; platen and feed rollers rotation; paper, card, sheet feeding, clamping and guiding arrangements.-A cash register is provided with a feeding mechanism including a pair of feed rollers 81, 84, Fig. 3, so as to feed a paper sheet or check 73, from an initial position at a stop 79 rearwardly into the machine to an end position, at which the feed is reversed and the check is fed from the said end position to a printing position, opposite type-wheels 351 and printing hammers 148, 158 (latter shown in Fig. 5). At each item printing operation a tab-forming mechanism, Fig. 14, forms a tab 75, Fig. 2, on the check so that an automatic line sensing mechanism rendered effective during said reverse feed for co-operation with the last-formed tab and movable thereby may interrupt the feed and stop the check at the next available printing line at the printing position. Subsequent to each item printing operation and tab forming operation an auxiliary rearward feed mechanism is rendered effective the feed the check a small distance rearwardly to disassociate the tab 75 from the sensing mechanism to free the cheek  for reverse feeding to its initial position at the stop 79. To initiate the said rearward feeding of the check, which is placed on a table 76, Fig. 5, between a fixed guide 77 and an adjustable guide 78 and against the stop 79, the feed roller 84, which is mounted on a pair of arms 87, Fig. 3, is rocked upwardly into engagement with the roller 81, by a pitman 125, via a crank 124, and the feed roller 84 is rotated through gearing by a slide 94, actuated by a lever 97 connected to a lever 98, free on a shaft 99 and carrying an arm 103 urged clockwise by a lever 107 operated by a bell crank 109 co-operating with a cam 112 fast on a printing operation control shaft 113. The cam 112 is shaped in such a manner so as to change the feeding of the check from said rearward feeding to said reverse feeding direction and also to arrest the feed movement at the printing station. As the change of direction feeding of the check takes place a hook 225 on a bent over-arm 226, Figs. 3 and 5, of the printing line sensing mechanism is lowered and as the check is fed in the reverse direction the hook 225 engages the last-formed tab 75, which tab pushes the arm 226 back, which urges a lever 228, Fig. 3, to cause a pair of stop pawls 231 to engage a ratchet wheel 237 (Fig. 13, not shown) fast with the feed roller 84, to thereby arrest the feeding of the check and locate it at the next printing line. Following printing and tab formation an auxiliary rearward feed mechanism, for feeding the check rearwardly a small distance, and comprising a tooth 259, Fig. 3, on an arm 260, pivoted on a pitman 262, mounted slidably on a shaft 88, co-operates with ratchet teeth 258, to shift the pitman to the left on rotation of a cam, further rotation of the cam effecting shifting of the pitman to the right, whereupon the feed roller 84 displaces the check rearwardly and the hook 225 is lifted. Continued movement of the pitman 262 to the right causes the arm 260 to engage a stop 274 to disengage the tooth 259 from the ratchet teeth 258 so as to restore the reverse feed movement of the check to feed it reversely to its initial position at the stop 79. The check feeding mechanism may be disabled by manual upward displacement of a lever 192, Fig. 3, so that a cam surface may engage a stud 149 on the arm 103 to rock it and move a stud 106 (Fig. 9, not shown) on the arm out of the path of an upward extension of the lever 107 so that no feeding movement will be imparted to the slide 94. Hammer impression arrangements.-A location of a point line of the check at a printing position opposite the type wheels 351, Fig. 6, on which item data has been set out by amount keys 63, Fig. 1, depression of motorised item keys 58 to 62, causes an item printing hammer 148, Fig. 6, carrying a resilient platen, to be brought into sharp contact with the type wheels when a block 166 passes an abrupt shoulder 170 of a cam 167, allowing spring 169 to act on an operating lever 159 to which the hammer is pivotally articulated. After printing the hammer 148 is reset by the cam. A total printing hammer 158, Fig. 5, is located adjacent the hammer 148 and is actuated and reset in a similar manner. The selection or disablement of the hammers is controlled by a cam 173, Fig. 8, set in conjunction with the motorised keys 53 to 62, Fig. 1, the cam having a low, intermediate and high cam surface 176, 175, 174, respectively, each co-operating with a stud 177 on a bell crank 178, which through a link 179 moves a finger 182 on an arm 180 against the stops in the hammer levers 159, 160. Depression of any item key, such as 58, causes the finger 182 to be positioned in the lowermost position (Fig. 7, not shown) to free the item printing hammer 148 and obstruct the total hammer 158. Depression of a total key, such as 53, frees the total hammer and depression of a sub-total key 57, shifts the finger into the uppermost position to obstruct both hammers and no printing takes place. Tab-forming mechanism.-The arm 180 controls the tab-formation of the tab 75 in the check, a tab being formed only, when an item key is depressed and the arm is in the lowest position, whereupon a stud 220, Fig. 14, on a crank 221 rocks a punch selecting plate 219 clockwise, to align a notched portion 222 with a flat stud 218 on a slide 205 carrying a punch 200 to permit the slide 205 to move upwardly and the punch 200 to enter an anvil 204 to form thetab 75 in the check, as a pin 215 on a cam 216 engages an arm 214. Key actions.-A lever 64 is provided for releasing of any depressed amount keys 63.