Patent GB-182921-A (GB)
Title: Improvements in and relating to paper carriages for typewriting and like machines
IPC: B41J11/22
Filed: 1921-04-12
Abstract: 182,921. Marks, E. C. R., (Corona Typewriter Co., Inc.). April 12, 1921. Paper - carriages. - In mountings comprising antifriction members running in channelled raceways on the carriage and a stationary support, one of the raceways mounted on the paper-carriage is adapted to yield laterally; the yielding raceway may have a rocking movement and may be divided into longitudinal sections; further, the raceways may be arranged to prevent vertical play of the carriage, and such arrangement may be employed also when the yielding raceway is mounted on the stationary support. The constructions described below are suitable for folding machines, and consist of sheet-metal stampings. In the construction shown in Figs. 3 and 7, the raceways consist of rigid flanges 18, 19 on the stationary bed-plate 16, a rigid flange 22 on the base-plate 21 of the carriage 34, and a yielding flange 25 which consists of two longitudinal sections pivoted on the base-plate in the following manner. Each section is formed at the ends with T-parts 30 resting in depressions 29 in the base-plate, the stems 31 passing through a slot separating the depressions. The sections are engaged by blade springs 32 which are secured to the base-plate and pass through slots 27 formed in a stiffening-flange 24 on the base-plate. The flange 24 limits the movement of the yielding sections and thus prevents the carriage from being detached by a lateral pull or push. The upper edges of the flanges 18, 19 are arranged near the base-plate and prevent vertical play when excessive pressure, such as may occur when the machine is folded, is applied. The bearings are open at the bottom and are protected at the top by the flanges. In the modified construction shown in Fig. 14, the raceways consist of rigid flanges 61, 62 on the carriage baseplate 59, a rigid flange 65 on the bed-plate 64, and yielding sections 25 which are pivoted on the bed-plate and co-operate with springs 32 and a stop-flange 24 in the'above-described manner. The doubled-parts 60 of the base-plate protect the bearings, and the bottom edges of the flanges 61, 62 form abutments when excessive pressure is applied to the carriage. Each pair of raceways receives two balls 37 which are retained in register with the opposite balls by a separator 38, Figs. 3 and 7, consisting of strips formed with eyes 40 for the balls, and united by a yoke 39 which is received by longitudinal recesses 43, 44 in the flanges 18, 19. The shoulders 45, 46 at the ends of the recesses engage the yoke to limit the travel of the balls, and confine each of the balls to one of the sections 25. The separator may also have fingers 42 for engaging stop-lugs 47, 48 on the flanges 18, 19. The separator 38 may be replaced by a pair of separators 51, Fig. 14, each having fingers 52, 53 for engaging stoplugs on the flanges, and for preventing the separator from tilting. Or, as shown in Fig. 13, each separator 55 may have a finger 57 for preventing tilting, and a finger 56 having an horizontal part entering a stop-slot 54 in the flange 18 or 19.