Patent GB-403011-A (GB)
Title: Improvements in or relating to manifolding devices for type-writing machines
IPC: B41J27/00
Filed: 1933-05-22
Abstract: 403,011. Typewriters. DOWSEY, J. L., George Street, Manhasset, Long Island, New York, U.S.A. May 22,1933, No. 14741. [Class 100 (iv).] Ink-ribbon mechanism.-In a manifolding-attachment for front-strike typewriters, one or more revoluble transfer-discs, arranged between parts of the sheets extending above the platen-roller, have their lower parts in the printing line and are frictionally rotated by the sheets during letterspacing or return movement of the carriage. Rotation of the discs distributes wear, and further distribution may be effected by laterally oscillating the discs. Discs of different colours may be provided for multi-colour work. As applied to type-carriage machines, movement of the discs is effected during movement of the typecarriage. In the attachment shown in Figs. 1, 3, and 5, ink or carbon discs 31 are revolubly mounted on pins 60 secured to arms 32 which are pivoted on a shaft 33. The pins are provided with backing-discs 64 and retaining- fingers 61 for the discs. The discs are preferably made of paper and may be coated or impregnated entirely, or only at the rim. When the discs are in use, the centres are above the printing point of the typewriter, and the rims overlap the printing line. The shaft 33 is mounted, as described below, in a bracket 47 on a standard 72 which is supported by the framework of the typewriter. The arms 32 are arranged within arms 42, 43 which are connected by a yoke 34 and are pivoted on the shaft 33. The yoke is provided with latches 38 which co-operate with extensions 36 of the arms 32 to hold them in depressed position. The latches are releasable by means of numbered fingerpieces 41 to permit of springs 37 moving the arms into the vertical position. The arm 43 carries an eccentric roller 48 which rides on the platen 20, the pivot 49 of the roller being carried by an arm 67 which is adjustable to adjust vertically the discs. The roller is provided with a ratchet-wheel 50 co-operating with a detent 51 which holds the roller during return of the carriage 21. When the webs 25 to be typed upon are in position on the platen, one or more of the arms 32 are depressed to interpose the discs between the webs. To provide for colour-change, the arms 32 may be provided in pairs carrying discs of different colours. The discs are rotated by frictional engagement with the webs during the letter-spacing and return movements of the carriage, and are oscillated by the roller 48 during the letter-spacing movement, wear of the discs being thereby distributed. The roller 48 may be replaced by a concentric roller or a shoe, oscillation of the discs being dispensed with. The bracket 47 consists of two parts 73, 79, Fig. 15, the part 73 being vertically adjustable on a square extension 71 of the standard 72 and being secured by a screw 77. The part 79 is rotatable on a boss 78 on the part 73 and is provided with a screw 85 for securing a square tube 45 to which is secured the shaft 33. A spring 82 holds the parts 73, 79 in engagement, and stop-pins are provided for limiting rotation of the part 79. The bracket permits of vertical and lateral adjustment of the arms 32, 42, 43, and the discs, and also permits the arms and discs, when out of use, to be swung to the rear of the typewriter. The standard 72 is carried by a bracket 89 adapted to be secured to typewriters of different makes. The bracket is provided with hooked arms 90, 92 for engaging the frame-plate 91, the arm 92 being laterally adjustable and being secured by nuts 93 carried by a screw 94. A block 95 mounted freely on the screw 94 carries a slide 96 adapted to engage the top plate 98 and provided with a hooked clamp 100 which is tightened by means of a nut 105 and screw 104. The bracket is drawn upwards by means of a nut 106. The standard may be integral with the bracket, but is preferably laterally adjustable on a member 109 which is vertically adjustable on the bracket, a screw 110 and clamp 111 holding the standard and member in position. Web-guiding arrangements.-The webs 25 are guided at the front by means of spring-fingers 52, 57, 58 mounted on arm 42. To facilitate interposing of the ink discs 31, the fingers 52 are permitted to spring outwards by raising a finger-lever 53 which normally abuts on these fingers.