Patent GB-422344-A (GB)
Title: Improvements in or relating to paper feeding mechanism for statistical and like machines
Filed: 1933-07-06
Abstract: 422,344. Typewriters &c. BALDWIN, R. E., 123, Fairlands Avenue, Thornton Heath, Surrey. July 6, 1933, No. 19218. [Class 100 (iv)] Sheet feeding and guiding arrangements; platen and feed-roller rotation for blanking &c.- Mechanism for feeding sheets to the platen of a statistical or like machine comprises means for rotating the platen a constant amount independently of the line-spacing mechanism to eject a sheet, auxiliary means for feeding sheets to the platen, means for releasing the auxiliary feeding-means after it has fed a sheet, and an indicator for use in setting the sheets by hand adjacent to the entrance of the auxiliary feeding - means, the distance between the indicator and the printing line being equal to the feed imparted by the auxiliary feeding- means. When applied to a record-card controlled machine, manually-set means are provided for causing the mechanism to operate during each cycle, or during total cycles only, or for disabling the mechanism. The mechanism shown in the Figure is constructed as an attachment to the tabulating-machine described in Specifications 26896 /13 and 271,935, [both in Class 106 (i)]. The mechanism comprises a sector 2 which is geared by means of pinions 10, 14 and a one-way coupling 12 to the platen 1. The sector is loosely mounted on a rockshaft 3 and has a pin 6 co-operating with a hook 5 secured to the shaft. A sheet is placed on a table 23 and is fed to the platen by means of pairs 17, 18, 19, 20, and 21, 22 of feed-rollers which are geared by means of pinions 27-30 to the pinion 14. The shaft 3 rocks during each cycle of the machine, and during counterclockwise movement of the sector, the platen is rotated to eject the typed sheet, and the feed-rollers are rotated to feed a fresh sheet to the platen. Means under control of a handlover 75 and the total-shaft 72 are provided for causing the mechanism to operate during each cycle, or during total cycles only, or for disabling the mechanism. The means comprises a stop-arm 60 adapted to engage a pin 61 on the sector towards the end of its counterclockwise movement. The stop-arm is pivoted at 62 to a bracket 63 and has a pin 65 engaging a notch 66 in an arm 67 pivotally connected to an arm 69 which is freely pivoted to an arm 71 on the total-shaft. The pin 65 is connected to a spring 80. The hand-lever is pivotally connected to the arm 69 by means of a pin 77 which can seat in any three retaining-notches 79 in a bracket 74. When the hand-lever is in the position shown, the mechanism is operated during total cycles only, operation of the totalshaft causing the stop-arm 60 to rock out of and into position for engaging the pin 61. When the hand-lever is depressed, the stop-arm is removed from the path of the pin, and the mechanism is operated during each cycle. To afford time for the operator to insert a sheet, the hand-lever, when depressed, may be arranged to control the usual device for stopping the machine after each cycle. When the handlever is raised, the stop-arm is moved into and remains in the path of the pin 61, and the mechanism is disabled. Guides 24, 25 direct the sheet from the feed-rollers 17, 18 to the feed-rollers 19, 20, and similar guides may direct the sheet to the feed-rollers 21, 22. In order, however, to reduce the distance between the feed-rollers 17, 18 and the platen, and thereby reduce the dimensions of the mechanism, the last-mentioned guides may be so arranged that two sheets can overlap. For this purpose, a guide 85, arranged between guides 86, 87, is provided with a pivoted flap 89 which is connected by a spring 104 to a rocking plate 102 having pins 101, 105 for engaging shoulders 94, 95 on a link 93 connected to an arm 91 on a rock-shaft 38. The link abuts on pins on a rocking arm 98 which is urged counterclockwise by a spring 100. The rock-shaft 38 is connected by a link 41 to a rocking plate 43 cooperating with projections 45, 46 on the sector 2. During successive advances of the link 93, the shoulders 94, 95 co-operate with the pins 101, 105, and the flap 89 is thrown forwards and backwards, so that successive sheets are directed in overlapping relation between the guides 85, 86 and the guides 85, 87 respectively. The table 23 is provided with side-lay 54 which, to permit of lateral adjustment, may have pins entering a pair of inclined slots in the table another pair of inclined slots being preferably provided to increase the range of adjustment. To permit of ready detachment of the side-lay, one of the pins thereon is provided with a nut, and the other pin is formed with a head arranged parallel to the side-lay. The guides 24 have openings 55 for gauging the sheet with respect to the printing line, the distance from the openings to the printing line being equal to the feed imparted by the feed-rollers, and the sheet being so positioned that the bottom of the heading, or the last line of a previously typed entry is visible through the openings. To facilitate insertion of the sheet, the feed-rollers 17, 18 are automatically separated during their idle period. For this purpose, a pivoted yoke 32 supporting the feed-roller 17 is connected by toggle-links 35, 36 to the rock-shaft 38. A similar arrangement may be provided for separating the feed-rollers 19, 20.