Patent GB-328878-A (GB)
Title: Improvements in paper-strip positioning devices for type-writing and like machines
IPC: B41J15/24
Filed: 1929-07-24
Abstract: 328,878. Gill, H. A., (Gilman Fanfold Corporation, Ltd.). July 24, 1929. Web feeding and guiding arrangements.-In multiple-ply web arrangements for typewriters and like machines comprising front and rear devices for holding the web in tension, the rear device being releasable independently of the front device, the rear device is caused to tension the web by moving therewith when it is brought into engagement with the front device. Preferably, the front device consists of depressible pins associated with a clamp, and the rear device consists of depressible pins mounted on a spring-retracted carriage. As applied to a flat-platen typewriter 10, Fig. 1, the usual webretaining device at the front of the platen 14 is replaced by a device 17, and a tensioning-device 37 is provided at the rear of the platen. The device 17 consists of a flanged plate 18, Fig. 3, provided with pins 25 and associated with a flanged clamp 28 carried by spring-urged levers connected by a link 35 to the pedal 34. The plate 18 is provided with lugs 19 secured to a cross-bar by screw-clamps which may be provided with web-guides. The pins 25 are provided at the front with hooks, or with projections which may consist of lips 26 on sloping heads. The tensioning-device 37 comprises pins 48, Fig. 7, mounted on a carriage 45 running on rails 42 on a support 38 which is mounted for adjustment to the front or rear on rods 40 and is secured by nuts 41. The pins are secured to a plate 49 which is pivoted at 50 to the carriage and is raised by a spring 52. A spring-urged bolt 53 mounted in a bracket on the plate 49 co-operates with a finger 59 on a plunger 55 which is mounted in a bracket 56 on the support 38 and is connected by an adjustable link 60 to the pedal. The support is provided with a web-guiding rod 62, and a web-guiding arm 63 formed on an arm 65 which is pivoted on a rod 66 and is held in contact with a lug by a spring 67. The rods 62, 66 are carried by brackets 64, 71, and are pivoted at one end so that they can be raised to permit threading of the webs. The carriage is pulled rearwards by springs 47 which are preferably arranged obliquely to increase the pull as the carriage is moved forwards. Rearward movement of the carriage is limited by the brackets 71. The pins 25, 28 engage apertures S<2> in superposed webs S which consists of blanks separated by tearing lines and are preferably delivered from a zig-zag pack S'. Carbons C carried by rollers 15 are arranged between the webs. During typing, the webs are held on the platen by the pins 25, 48, the carriage being in forward position and being urged rearwards by the springs to maintain tension in the webs. On depression of the pedal, the clamp 28 is raised and the finger 59 of the plunger 55 engages the bolt 53 and depresses the plate 49, the pins 48 being thereby withdrawn from the perforations and permitting the carriage to be drawn rearwards by the springs. To facilitate withdrawal of the pins, the pivot 50 is arranged at the rear of the pins. On pulling forwards the web to bring new blanks into position for typing, the pins 48 re-engage perforations and the carriage is drawn forward so that on engaging the pins 25 with perforations the webs are again held in tension. On releasing the pedal, the clamp 28 engages the webs, and the finger 59 rises and passes idly over the bolt. Web-cutting arrangements.-A flange 29, Fig. 3, on the above-described clamp 28 is employed for severing the webs S, Fig. 1.