Patent GB-108575-A (GB)
Title: Improvements in Typewriting Machines.
Inventor: FAIRWEATHER WALLACE CRANSTON
IPC: B41J11/36
Filed: 1916-09-29
Abstract: 108,575. Fairweather, W. C., (Underwood Typewriter Co.). Sept. 29, 1916. Sheet and web feeding and guiding arrangements.-In an arrangement for feeding independently a record sheet and an original sheet or web of sheets separated by perforations for purposes such as condensed billing, (1) the original is fed by auxiliary feed-rollers spaced apart from the platen and geared to the line-spacing mechanism and (2) a blanking-feed device is provided in connexion with the auxiliary feed-rollers. (1) As shown, the original sheet or web 46 passes between auxiliary feed-rollers 31, 32 arranged above the printing line and spaced apart from the platen 12, the roller 31 being provided with a pinion which gears through a pinion 44 with a wheel 42 on the platen. The roller 31 is journaled in the carriage 14 and the roller 32 is journaled in arms 35, 36 which can be pulled forward by a knob 39 to separate the feed-rollers, engagement being normally maintained by a spring 40. The record sheet 47 is wider than the original sheet and is held against the platen by feed-rollers 26, 27 and fingers 28 which engage the edges of the record sheet only. The fingers are provided with rollers 30. On operating the line-spacing lever 18, the original and the record sheets are fed independently. In the arrangement shown, the auxiliary feed-rollers have the same peripheral speed as the platen and the original and record are fed at the same speed, but, by substituting feed-rollers or pinions of other sizes, the sheets may be fed at different speeds. (2) The blanking-device comprises a crank 50 loose on a shaft 51 which is iournated with longitudinal freedom in brackets 56, 57 secured to the carriage 14. A pinion 58 en the shaft 51 gears with the pinion 44 which is mounted on a loose arm 60 depending from the shaft and prevented from rocking by a pin 91. A spring-pressed sliding pawl 62 on the crank can engage a ratchet-wheel 63 on the shaft 51 but is normally held free by engaging the edge of a disk 68 which is formed with a notch 69 and is frictionally coupled to the ratchet wheel by a spring washer 75. During the normal feed of the sheets, the shaft 51 is in the left hand position and the pinion 44 gears with both pinions 42, 58; the auxiliary feed-rollers are thus geared to the platen and the shaft 51, and as the sheets are fed, the disk 68 is rotated rearwards. When the original has been written, the crank 50 is moved to the rear and a lug 88 thereon rides up an incline 89 and causes the shaft 51 with the pinions 44, 58 to move to the right and thereby disconnect the auxiliary feed-rollers from the platen. During the rearward movement of the crank, the pawl drops into the notch 69, at a point determined by the movement of the disk 68, and thereby couples-the crank to the pinion 58 and the auxiliary feed-rollers. The further rearward movement of the crank, determined by an adjustable stop 53 which is set to correspond with the length of the criginal sheet, is effective to feed onwards the original until the next original sheet is brought to the printing position, the record sheet remaining a rest. On releasing the crank. it is returned against a stop 52 by a spring 94, an incline lifting the pawl out of engagement with the ratchet wheel and a spring then moving the shaft 51 to the leit. Over-throw of the ratchet-wheel is prevented by a latch 81 pivoted on the crank and provided with a shoulder 83 which is swung over a. lug 84 on the pawl 62 when the latch strikes the stop 53. The disk 68 is provided with a pin 79 for engagement with the stop 52. The shaft 51 is provided with a thumb-wheel 86.