Patent GB-983091-A (GB)
Title: Audit strip printing and feeding mechanism for a data entry machine
IPC: B41J9/42
Filed: 1963-11-21
Abstract: 983,091. Typewriters &c. NATIONAL CASH REGISTER CO. Nov. 21, 1963 [Nov. 27, 1962], No. 46008/63. Heading B6F. A data entry machine is provided with an audit strip-printing and feeding mechanism comprising an impression hammer 800, Fig. 2, rocked at each machine operation to take an impression from typewheels 715 on to the audit strip 802 and a mechanism directly actuated by the hammer, at each rocking movement both to line-space -the audit strip and to reciprocate the latter between a viewing position 802c and a printing position. Type-wheel actions; type-wheel machines.- The data entry machine is provided with typewheels 715, Fig. 2, settable under control of depressed amount keys 11 (Fig. 1, not shown), by means of racks 711 and similar type-wheels are provided for identifying the type of transaction as determined by the depression of control keys 12 and further wheels for the printing of a consecutive number. Hammer impression arrangements.-The audit strip impression hammer 800, Fig. 5, comprises a plate 800a having secured thereto a bail 800b and is rockably mounted on a stud 809. A pair of studs 813, 814 mounted in a side wall of the machine project into slots 800h and 800i, respectively, to guide the hammer in its rocking movements. A printing platen 800c is centrally and pivotally supported by a stud 800d and yieldingly secured to the bail 800b by spring-urged studs 800e and 800f (Fig. 4, not shown). The hammer is driven for impression by a roller 705a mounted on a gear 705 driven from a main cam-shaft (not shown), the roller 705a engaging a bifurcated end 800g to rock the hammer about the pivot-pin 809. The other end of the hammer is provided with teeth 801, Fig. 16, which engage with teeth on a toothed segment 803 freely mounted on a stud 817 and hubbed to a larger toothed segment 803a having teeth 803c, which together with a locking surface 803b co-operate with a first rotary member 804 to reciprocate the audit strip 802 from said viewing position to a printing position as the hammer is rocked between a rest and impression position. Blanking, long feeds and feeding to a particular line; line-spacing arrangements; web, stripfeeding, clamping, guiding, tensioning and cutting arrangements.-A supply roll 802a, Fig. 6, of the audit strip 802 is mounted on a sleeve 815, Fig. 3, slidably mounted on a bearing 815a in turn mounted on a stud 817. A spring 816 urging the sleeve 815 counterclockwise keeps the audit strip 802 constantly tensioned thereby causing a take-up spindle 812, having mounted a take-up roll 802b thereon, to be urged in the same direction so that a spring 811, encircling the rear part 812c of the take-up spindle 812 and the hub 812b of the member 804, acts as a coupling preventing the take-up roll 802b from being wound off. The audit strip 802 is fed from the supply roll 802a via guiding studs 802f, 802g, 802h and 888 to the take-up roll 802b, Fig. 2. With the data machine at rest the last printed item on the audit strip 802 appears at the viewing position 802c. In operation, a movement imparted to the toothed segment 803a by the rocking hammer from its rest position is transmitted through the teeth 803c to the rotary member 804 to rotate the latter counter-clockwise until the locking surface 803b engages the tooth gap 804b, whereby under the influence of the spring 816 the take-up roll 802b and its spindle 812 are allowed to rotate counter-clockwise and the audit strip 802 is displaced from the viewing position 802c to the printing position. To effect line-spacing a second rotary member 805 rotates concomitantly with the first rotary member 804, and which however prior to the latter making its full counter-clockwise movement contacts a surface 887 of a cam 886 with a roller 805b attached thereto whereby the rotary member 805 is arrested. The arrestment of the member 805 renders effective a further coupling spring 810 which also causes the takeup roll 802b and its spindle 812 to be arrested, whereby the coupling spring 811 becomes ineffective and the member 804 continues its counter-clockwise movement for a distance equal to one line space of the audit strip 802. Immediately the hammer 800 commences its return movement the member 804 rotates clockwise, whereby the coupling spring 811 becomes effective to couple said member to the take-up spindle 812 which displaces the audit strip to the viewing position 802c through a distance equal to its counter-clockwise movement plus an additional line space. The rotation of the member 804 also restores the second member 805 since the coupling spring 810 is ineffective during the clockwise movement of the member 804. To effect uniform line-spacing irrespective of the diameter of the take-up roll 802b, a feeler arm 882 is loosely mounted on a stud 90 engaging the periphery of the roll by a roller 882b. A further arm 883 is pivoted to a link 885 connected to the cam 886, whose shape is such that when rocked counterclockwise the extent of the counter-clockwise movement permitted to the rotary member 805 will vary with respect to the movement of the member 804 but the line-spacing amount of the audit strip 802 will remain constant. When changing the audit strip a latching member 894 may be manually operated by the handle 882a to engage with its arm 894a a nose 883a of the arm 883, whereby also the feeler arm 882 is disengaged from the roll of the audit strip. On replacement and during the next machine operation a nose 804d of the rotating member 804 will engage a second arm 894b of the latching member 894 removing the arm 894a from the path of the nose 883a and the torsion spring 889 will cause the arm 882 to contact the take-up roll 802b with its roller 882b. A receipt printing and cutting device 7 is provided adjacent the audit strip 802 printing mechanism.