Patent GB-1153808-A (GB)
Title: Improvements in or relating to Printers
IPC: G07F17/42
Filed: 1967-11-27
Abstract: 1,153,808. Checking receipts. INTERNATIONAL BUSINESS MACHINES CORP. 27 Nov., 1967 [21 Dec., 1966], No. 53758/67. Heading G4T. A cash register adapted for use with credit sales includes a printing mechanism for recording a customer's credit card data on to a record web 18 and a sales slip 32 during a totalizing cycle of the register, the printing mechanism including an impression roller 33 driven through two strokes driving a printing cycle to record the customer's account number only on the record web during the first stroke and the full credit card data on the sales slip during the second stroke, and means 34 for feeding the sales slip to a position overlying the record web and credit card 11 between the first and second strokes of the platen roller. Item listing print stations 50, 60 record the items purchased on the record web and sales slip during itemizing cycles and cooperate with the printing mechanism during a totalizing cycle to print totals on the record web and sales slip. Record web feeding means.-The record web is fed from a supply spool 20 to a take-up spool 22 by feed rollers 26, 28. The feed roller 26 is secured to a shaft 27 advanced by a gear segment 58 engaging a gear 63 fast with a disc 150 rotatably mounted on the shaft. A pawl pivotally mounted on disc 150 engages a ratchet fixed to the shaft. The gear segment is rocked by a link 56 and cam follower 53 engaging through a pin-and-slot connection 54, 57. During itemizing cycles the pin 54 idles in slot 57 during its initial movement, rocking the gear segment during its last few degrees of movement whereby the record web is stepped line-by-line. Reverse movement of the record web is prevented by a pawl 161 on a second disc 160 held stationary by a pawl 168. During a totalizing cycle, shaft 80 is rotated to pivot lever 130 and lower a blade 257 into the path of pin 54. The gear segment is now rocked a greater extent to move the last line of print from the printing station 50 to a position just to the right of a customer's credit card number 11a During this movement, the edge 153 of disc 150 engages a pin 162 on disc 160 to carry the disc 160 along against the action of pawl 168 and thereby release a pawl 165 urged by spring 166 to engage a second ratchet secured to the shaft 27. Reverse rotation of the gear segment 58 rotates the disc 150 counterclockwise to bring the edge 152 against pin 162 and rotate disc 160 moving the record web to the left through the action of pawl 165 and the second ratchet. Due to the initial lost motion of the disc couplings 152, 162, the record web moves to a lesser extent in the reverse direction to bring the next line adjacent the print station 50. The shaft 27 drives a tim ing chain 64 moving a pawl carrier 65 co-opera ting with a ratchet 68 on the take-up shaft 23 The ratchet 68 is mounted on the take-up shaft by a spring-wrap overload friction clutch 69. Sales slip feeding mechanism.-To insert a sales slip in the cash register, a button 74 is depressed to separate feed rollers 34, 36 and lift a finger 76 locating the sales slip in its initial position. During itemizing cycles, shaft 80 is rocked counterclockwise from the position shown in Fig. 4, to lift the link 106, whereby cam follower 102 co-operates with a shoulder 114 to rock pawl carrier 116. The latter advances a rachet 120 on the shaft 45 of feed roller 34 to feed the sales slip line-by-line through the print listing station 60. During totalizing cycles, the mechanism is returned to the position shown in Fig. 4, to engage clutch 79 driving a member 124 disabling drive pawl 118 and non-return pawl 122. In addition, an actuating arm 107 is lifted to engage a shoulder 115 with a cam follower 102, Fig. 5. The actuating arm 107 oscillates a gear segment 117 driving a gear 121 on the shaft 45 to feed the sales slip above the credit card on its forward stroke and out of the cash register on its reverse stroke. During the itemizing cycles, the gear segment 117 is rotated clockwise by gear 121 so that during the totalizing cycles the actuating arm 117 drives the gear segment the remaining distance up to limit stop 127 whereby the sales slip is located in the same final location above the credit card irrespective of the number of itemizing cycles. Printing mechanism.-The impression roller 33 is reciprocated in a frame 35 at each machine cycle by cam 17, cam follower 42 and links 40, 44 and 31. During itemizing cycles the frame is held in a raised position with the impression roller clear of an ink ribbon 12. During totalizing cycles, a cam 37 is rotated to lower the frame and bring the impression roller into its operative position.