Patent GB-524023-A (GB)
Title: Improvements in or relating to paper-feed mechanism for typewriters or calculating and like machines
IPC: B41J11/36
Filed: 1939-01-19
Abstract: 524,023. Typewriters &c. WANDERER-WERKE AKT.-GES. Jan. 19, 1939, No. 1883. Convention date, Jan. 19, 1938. [Class 100 (iv)]  Web and sheet feeding-arrangernents; linespacing mechanism; feed-roller rotation for blanking.-A web consisting of separable sheets passes over line-spacing and blanking devices, and the actuating-means for the blanking-device is arranged to release pressure-rollers from the line-spacing device when the blanking-device is actuated. In the apparatus shown in Figs. 1 and 5, a web 123 consisting of a series of bills passes over a platen-roller 21 and a blanking- roller 20 mounted in the carriage 6. A pressureroller 68, co-operating with the platen-roller, is mounted in a spring-urged rocking frame 65 provided with a roller 64 which co-operates with acam 63 formed on a sector 50 pivoted on a pin 60 on the carriage. A pressure-roller 127, co-operating with the roller 20, is mounted in a bail 146 which can be rocked backwards about a pivot 147 to disengage the pressure-roller, a spring 148 being arranged to hold the bail in normal or displaced position. A ratchet-wheel 120 on the platen-roller shaft co-operates for line-spacing with a pawl 82, Fig. 13, carried by an arm 85 on a shaft 84, and provided with a pin 105 co-operating with an incline 108. The shaft 84 is provided with a roller 87 which, during return of the carriage, co-operates with a one-way, pivoted abutment 111 to rock the shaft and thereby cause the pawl to engage the ratchet-wheel and effect line-spacing. The roller 20 is provided with a ratchet-wheel 44, Fig. 1, co-operating with a pawl 38 on a loose disc 36 in connection with a pinion 35 which engages the sector 50. The pawl is provided with a pin 40 which co-operates with a looped spring on the hub of the pinion 44 to move the pawl into and out of engagement with the ratchet-wheel when the sector turns clockwise and anti-clockwise respectively. A yoke 69, secured to the sector, has pin-and-slot engagement 71 with a plate 73 which is pivoted'on a pin 74 on the carriage. A pin 90 on the plate 73 co-operates with an arm 76 which is pivoted on the pin 74 and has a roller 92 for engaging a stationary cam 5. The arm 76 is held in mid-position by a forked spring 79 which embraces a stationary pin and a pin on the arm. The apparatus may be employed for typing electricity and gas bills, Fig. 12, the date, old and new meter-readings, consumption, cost, extras, and total being typed in column 1, columns 2 and 3, columns 4 and 5, column 6, columns 7 and 8, and column 9 respectively. When columns 1 and 2 have been typed, the roller 92 rides down an incline 95 on the cam 5, and during the typing of columns 4 to 6, the roller rides on the bottom of the cam. If columns 2 to 6 contain entries relating to more than one meter, the carriage is returned one or more times and successive entries are typed. Each time the carriage is returned, the roller 87 and abutment 111 co-operate, the pawl 82 co-operates with the ratchet-wheel 120, the bill is line-spaced, and slack is formed in the part of the web between the roller 127 and a guide-rod 151. When columns 7 to 9 have been filled in, the carriage is fully returned, the roller 92 rides up an incline 119 on the cam, and the sector 50 is turned clockwise. The cam 63 co-operates with the roller 64 to release the pressure-roller 68, and the pawl 38 then engages the ratchetwheel 44 and rotates the blanking-roller 20. The blanking-roller first takes up the slack formed in the web during line-spacing operations, and then feeds forwards the web to bring a new bill into the printing position. The pin 90 is adjustable in a slot 80 to adjust the feed-movement. A record-sheet 129, Fig. 5, is arranged behind the web 123 and is held in engagement with the platen-roller by means of rollers 130, 131 carried by spring-urged bails 132, 133 connected by a slotted link 137. The rod 151 is secured to the bail 133 and is arranged to form a bend in the web 123. On depression of a knob 141, the bails are swung to disengage the rollers 130, 131 from the platen-roller, and are retained by co-operation of a latch 142 with the stem of the knob. The web 123 has a carbon backing for inking the record-sheet, or a separate carbon sheet may be employed for this purpose. The roller 68 can be disengaged manually by means of a finger-lever 160, Fig. 1, connected by a link 165 to a lever 167 which abuts on the sector 50. When the finger-lever is moved forwards the sector disengages the roller 68 by means of a cam 63 but does not effect engagement of the pawl 38 with the ratchet-wheel 44. In the forward position the link 165 abuts on a pin 171 and forms, with the finger-lever, a selflocking toggle. To provide for manual rotation of the roller 20, the ratchet-wheel 44 is secured to a loose sleeve 24 which is coupled to the rollershaft by co-operation of fine teeth on the sleeve with a spring-urged sleeve 27 splined to the shaft. On retraction of the sleeve by means of a flange 28, the roller can be rotated by means of a knob 34. A similar coupling is provided between the ratchet-wheel 120 and the platenroller 21. The blanking mechanism can be rendered inoperative by depressing the arm 76 by means of a finger-lever provided with a catch. When the apparatus is employed for typing paysheets and the like, the entries are typed under one another, the carriage remains stationary, and line-spacing and blank-feeding are performed in the following manner. The shaft 84, Fig. 13, is provided with an arm abutting on a bail mounted on the carriage and co-operating with lever mounted on the framework. Each time the motor-bar of the apparatus is depressed, the lever is rocked, and the shaft operates the line-spacing pawl 82. The blanking-mechanism is operated by an arm 75, Fig. 1, which is pivoted on the pin 74 and abuts on the pin 90. A roller 93 on the arm engages a link 184, Fig. 9, carried by bell-cranks 182, 183 on the framework. Another link 185 carried by the bell-cranks is provided with a pivoted arm 190 having a projection 207 for co-operation with a pin 196 on a disc 195 which makes one revolution at each operation of the apparatus. Normally the arm 190 is held up by a rod 193 but on depression of the blanking-key, the rod is withdrawn, and the pin and projection co-operate to depress the link 184 and roller 93. Thereupon, the arm 75 rocks the arm 73, and the blanking-mechanism operates in the above-described manner. The totalizing-key may be employed also as a blanking-key, or a separate blanking-key may be arranged also to depress the totalizing-key. The apparatus may be embodied in machines having a non-travelling platen-roller, line-spacing and blanking-feed being performed under key-control in the above-described manner.