Patent GB-280718-A (GB)
Title: Improvements in or relating to paper-feeding mechanism for typewriters and like machines
IPC: B41J13/042
Filed: 1926-11-27
Abstract: 280,718. Barr, J. H., and Barr - - Morse Corporation. Nov. 27, 1926. Sheet feeding and guiding arrangements. - A feed-roller system, comprises (1) releasable front and rear feed - rollers mounted on rocking arms and engaged at the middle by pressure arms, the arrangement being such that the feed-rollers are pressed evenly into contact with the platen, (2) a paper-apron releasable simultaneously with the feed-rollers, and (3) top feed-rollers carried by a bail associated with a spring toggle for holding the bail in normal or released position. In the arrangement shown in Figs. 1 and 2, front and rear feed-rollers 45 are mounted by means of sleeves 46 on spindles 44 secured to pairs of arms 43 which can rock on a shaft 38 mounted in the end plates 11 and in yokes 47 secured to the bottom plate 12. The spindles 44 have threaded ends somewhat loosely engaging threaded eyes in the arms 43, the arrangement permitting the feed-rollers to adjust themselves to the platen. Rotation of the spindles is prevented by contact of the arms with the ends of the threaded parts, these ends being preferably shouldered. The feed-rollers are held in even engagement with the platen by means of pairs of arms 48, 52 abutting on the sleeves at the middle. Each pair of arms is pivoted on a pin 50 on one of the yokes 47, and the arms are drawn together by means of a spring 55 mounted on a bolt 53 which passes through the arms and carries a nut 54 for adjusting the spring. The shaft 38 carries cams having noses 58 for engaging the arms 48, 52, and on rocking the shaft by means of a hand-lever 59, the cams rock the arms and the feed-rollers are released. The hand-lever can be locked in released position by means of a catch-lever 71 which is pivoted on the hand-lever and has a hook 74 for engaging a pin 75. An apron 65, slotted to receive the feedrollers, rests on the sleeves 46 of the front feedrollers and on the angles of the arms 52. The apron is guided vertically by means of slotted lugs 66 straddling bushings 61, 62 on the shaft 38, longitudinal movement of the apron being prevented by means of a finger 68 thereon which is arranged between two of the arms 43. When the feed-rollers are released, the apron drops until a bend in the finger 68 rests on a sleeve 64 on the shaft 38. A rod 24 supporting top feedrollers 25 is secured to arms 22 pivoted at 23 to the end plates 11 and connected to forked links 28 which engage grooved guide-pins 31. Springs 33 for holding the feed-rollers in contact with the platen 10 are mounted on the forks of the links 28 and abut on loose slotted plates 34 which are mounted on the forks and rest on the guide-pins. When the rod 24 is pulled forwards to release the feed-rollers, the springs pass over the dead centre and retain the parts in released position, the movement being limited by engagement of fingers 36 on the arms 22 with lugs 35 on the links 28. Paper-supports.-(1) The platen is received by open bearings 17 in the end plates 11 of the carriage and is retained by pivoted latches 18 connected to springs 20 and having curved faces 21 arrargied so that on insertion of the spindle, the latches are forced backwards and then snap over the spindle. (2) The feed-rollers 25 are each secured to a sleeve 25<a>, Fig. 1, which is revoluble on the rod 24 and is provided with a flanged enlargement 25f containing a split sleeve adapted to retain the feed-roller in adjusted axial position. Platen scales.-The rod 24 may be formed with a flat 26 bearing a scale.