Patent GB-392070-A (GB)
Title: Improvements in carbon-web equipments for typewriting machines
IPC: B41J17/00
Filed: 1932-10-15
Abstract: 392,070. Typewriters. FAIRWEATHER, W. C., 65, Chancery Lane, London.-(Underwood Elliott Fisher Co. ; 342, Madison Avenue, New York, U.S.A.) Oct. 15, 1932, No. 28841. [Class 100 (iv).] Ink-ribbon mechanism.-In a carbon-web equipment for typewriters of the type equipped with means for directing carbon webs crosswise of the line of movement of a carbon carrier for interleavement with work-webs, diagonal guide-wires are provided for directing the carbon-webs into the line of movement of the work-webs, the guide-wires being secured so that they may be readily removed from their working positions to facilitate the interleavement. Two pairs of carbon spools 30, Figs. 1 and 3, are mounted one on each side of the carrier and the carbon webs are unwound from the spools and pass under guide-rods 58 removably mounted in brackets 55, 56, which also serve to support the spools 30. The carbon webs 93 pass over diagonally arranged bars 80 so as to be guided into the path of the work webs 92, the bars 80 having bent extensions 81, and the ends of the bars 80, 81 being fixed in the rods 58 rotatably and detachably mounted in apertures 85, 86 in the supports 55, 56. For interleaving the webs, the rods 58 and guides 80 are removed and the first carbon web is drawn from its spool until its front end is advanced beyond the position occupied by the rod 58. This rod is then replaced and turned so as to elevate the diagonal guide 80, when the carbon web is further advanced and is turned about the guide 80 which is then swung down to hold the carbon and work-webs between the bar 81 and a support 133. The remainder of the carbon webs are similarly interleaved, the carbon webs being drawn alternately from spools on opposite sides of the carrier so as to interleave with the work-webs, which may be fan-folded. The carbon carrier is removably attached to a truck 38 which carries grooved rolls 40, which embrace the edges of plates 41, attached to the tops of guide rails 31 fixed to the machine carriage. The base 43 of the carrier is provided with slotted pegs 46, which pass through corresponding apertures in the truck plate 39 and are locked in position by pivoted levers 47 which engage the slots in the pegs 46. The carrier may extend longitudinally beyond the truck, and the extensions 126 may form supporting lugs for paper guides 124 ; alternatively, these may be attached to the guide-rail frame 31, 32. The brackets 55, 56 which support the guide-rods and the carbon spools are attached to the carrier, the spools being mounted on spindles 57, having reduced ends, one of which 69 fits into an aperture in the plate 56, while the other is received in a slot 75 on the plate 55, and is held therein by a projection 73 on a sliding latch-plate 70, which serves to hold in position the two spools which are mounted in the plate 55. The spools are formed with squared openings in which engage squared or rounded blocks attached to the spool shafts 57, and, to accommodate spools of different length, a movable end-plate carrying a squared block may be adjustably mounted on the shaft. The ends of the spool shafts carry toothed flanges 62, and the spools may be be locked against rotation by spring-pressed pins which engage with the teeth 68 but may be manually disengaged therefrom and held from engagement by a spring-pressed pivoted catch member. The guides 80 may be used with narrow webs or with work-webs having plies of different width, and in this case the guides may be made shorter to fit the web. The retraction of the carrier is effected by the lever 135, the work-web being meanwhile held by the platen 23, which is mounted on an axle 24 in endplates, pivoted to a cross-shaft. Two work-webs may be interleaved at the same time on the carbon carrier, only one of the webs being passed over the platen 23, the other being brought out beyond the carrier and doubled back, and the free end being retained by passing it between two of the bars 81. Web-cutting arrangements.-The guide 80 may serve to sever the plies of the work-web, and for this purpose the front edge of the guide which serves as a cutter may be extended to project beyond the edge of the web so that, as the carrier is retracted after a length has been typed, the folds of the web are cut.