Patent GB-978526-A (GB)
Title: Cylinder printer for petrol-dispensing pumps
IPC: B41J1/32
Filed: 1963-09-02
Abstract: 978,526. Printing receipts. KIENZLE APPARATE G.m.b.H. Sept. 2, 1963 [Sept 22 1962] No 34581/63. Heading G4T. A printer for attachment to a petrol pump includes impression rollers mounted in a carriage, which press a receipt card against type faces as the carriage is moved by hand across the type bed in one direction, and which are raised out of contact with the type in the return direction. In the token plate imprinter described the impression rollers 55 are mounted on a shaft 61 supported in a cage 60 pivoted to a shaft 58 of the carriage 5. During the forward movement of the carriage, which is supported by wheels 58 or balls (Figs. 5 and 6 not shown) running in grooves 6, the rollers are pressed downwardly by spring action so that they press receipt card 1 against raised type on an inserted token token plate 2 and against type wheel sets 15,16,17 set according to the price and quantity of petrol dispensed and the date respectively. When the carriage 5 approaches the forward end of its movement a pair of wheels 62 mounted on the ends of shaft 61 run up ramps 3<SP>1</SP>, 3<SP>11</SP> tilting the cage 60 so that the rollers 55 are lifted from their operative position. A pawl 66 mounted on the carriage tips under the action of a spring 67 so as to be positioned below a pin 64 on the cage so as to lock the roller in its inoperative position until the pawl 66 is tripped by a stop 66<SP>11</SP> when the carriage reaches its initial position again. The type wheel sets 15, 16 are basically of known counter construction the lowest denomination of each being driven through gears 30, 31 by the price and quantity counters in the petrol pump. Transfer between denominations is performed by heart shaped cams and pinions 20, and resetting to zero is effected by pawls 22 which engage notches in the wheels such as 16 in the zero position, the pinions 20 being disengaged by pivoting their supporting frame 21 about an axle 23 during resetting. While the type sets are being set by the counters a bar 32 has to be moved to the right from the position shown and a projection 43 on the bar engages the carriage and prevents it being moved. When dispensing ceases the bar is automatically moved back so that teeth 33, 34 set the lowest denomination of each type-set to the nearest whole number position. Resiliently mounted pawls 37 are provided to overcome a possible dead centre position. Aligning members such as 45 are provided, which members are normally disengaged from the type wheels but which are pressed inwardly to engage and align the higher order wheels, by rollers mounted on the carriage. A full stroke mechanism comprising rack 9 and a pawl 71 is provided. A projection 44 similar to the projection 43 but on the opposite end of the bar 32 is positioned just above a pin 73 on the pawl 71. During the forward and return movement of the carriage, the pawl, which is mounted on the carriage, is first rocked clockwise and then anticlockwise so as to end up with the pin 73 above the projection 44 after a return movement of the carriage. This ensures that a second printing cycle cannot be performed until the type wheels have been zeroized, during which action the projection 44 is temporarily moved out of the path of the pin 73 on the pawl 72, so that the pawl can return under the action of a spring 74. Duplicates of the receipt card may be produced by a known photo-printing process.