Patent GB-273150-A (GB)
Title: Improvements in billing attachments for typewriting machines
IPC: B41J11/48
Filed: 1926-11-16
Abstract: 273,150. Fairweather, W. C., (Underwood Typewriter Co.). Nov. 16, 1926. Sheet feeding and guiding arrangements; ink-- ribbon mechanism.-In a condensed-billing attachment, the record sheet is inked by carbon paper which is arranged over the printing line and is normally stationary; the carbon paper may consist of a web mounted on a spool associated with a guide shoot and means for feeding the web at will; the arrangement may be duplicated for dealing with two record sheets. In the attachment shown in Fig. 1, a roll 36 of carbon paper is wound on a spool 44 mounted in a cylindrical casing 37 which is supported on brackets 51 on the carriage 12 and has depending plates 38. 39 forming a tapered shoot for guiding and protecting the carbon paper. The casing is detachably mounted on removable sleeves which pass through hubs on the brackets and enter the ends of the casing. The shoot is held in contact with the platen 10 by a spring 60 and can be rocked by means of finger-pieces 59 for the purpose of raising the shoot. The spool is provided with pins engaging holes in plates near the ends of the casing, one of the holes opening on a slot 50 so that on turning back_a cover 43 the spool can be inserted or removed. The carbon paper hangs over the printing line and remains stationary during the typing of a number of sheets, a rubber feedroller 55 actuated by a knob 58 being provided for feeding downward the carbon paper to bring an unused part to the printing line. The platen cooperates with feed-rollers 17 passing closely through slots in an apron 30 which can slide on pins 32 and is looselv connected by a bracket 34 to one of the supporting- arms 19 of the feedrollers. On depressing the usual release-lever 29, the feed-rollers are released by means of the notched rock-shaft 25, and the apron is depressed. Since only slight depression of the apron is necessary, there is provided a lever 61 adapted to semi-depress and retain the release-lever. The lever 61 rocks on the right-hand bracket 51 and has a cam-edge 62 engaging the release-lever, the movement of the lever being limited by a pin 64 and shoulders 63. After release: of the feedrollers and apron, a record sheet A is passed round the platen and under the shoot and paperfingers, and is adjusted to bring the first line to the printing line. The statement sheet B is then passed round the platen, the feed-rollers and apron are restored, and one or more lines are typed, the statement and record sheets being inked by the ink ribbon 67 and carbon paper respectively. The carbon paper is fed downwards at intervals and when it reaches the apron is retracted and the used part is cut off. In the attachment shown in Fig. 6, the casing of the carbon-paper roll 73 is arranged at the rear of the platen and is formed with a shoot 74 extending round the platen to the edge of the apron 70. the carbon paper standing above the printing line and being fed upwards to bring an un-used part to the printing line. On depressing the apron, the record sheet A can be introduced from the rear into the space between the shoot and platen, and the statement sheet B can be introduced from the front into the space between the shoot and apron. To obviate cutting of the carbon paper, a winding-spool 75 for the carbon paper may be provided at the front of the platen, the casing of the winding-spool having a depending shoot 77. For use with two record sheets, carbon-paper rolls may be arranged at the front and rear of the platen in front and rear casings having a depending shoot, and a shoot extending round the platen respectively, the record sheets being introduced from the rear into the space between, the platen and rear shoot, and being separated at the front by the shoot of the front casing.