Patent GB-121926-A (GB)
Title: Improvements in Web-feeding Arrangements for Typewriting Machines.
Inventor: FAIRWEATHER WALLACE CRANSTON
IPC: B41J17/00
Filed: 1918-07-27
Abstract: 121,926. Fairweather, W. C., (Underwood Typewriter Co.). July 27, 1918. Web feeding and guiding arrangements; ink - ribbon mechanism.-Relates to webmanifolding arrangements particularly for machines of the kind described in Specifications 23349/14 and 105,115, in which carbon sheets interleaved with webs are connected to a trolly 29 and are fed round the platen with the webs and then retracted. (i) To relieve the line-spacing mechanism 12 from the work of unwinding the webs, and to prevent the webs from interfering with the travel of the platen - carriage, an auxiliary feeding-device 73, connected to the carbon-sheet trolly 29, is provided for forming a tensionless part or bight 98 in the parts of the webs that depend from the frame 31 on the platen-carriage 4. The auxiliary feeding-device may consist of a carriage 73, mounted on rails 75 forming part of a frame which is supported on the floor and carries the web rolls. The carriage 73 is coupled to the trolly 29 by a bar 96 and carries a clamp 76, controlled by a finger-lever 57 on the trolly, for gripping the webs when the trolly is moved to the rear. The clamp consists of two arms 76 which co-operate with ribs 77 on the carriage and are secured to a shaft 78 mounted on brackets 91 on the carriage. A shaft 94, connected by linkage 95 to the shaft 90, carries a plate 82 having a cam slot 81 in engagement with an arm 79 on the shaft 78. The bar 96 is formed with a fork 97 which engages freely the shaft 90 and embraces a splined arm 89 which is connected bv a link 88 to an arm 87 on a shaft 86 mounted on the trolly 29. The finger-lever 57 is pivoted on the handle 37 for returning the trolly, and is connected by a link 83 to an arm 85 on the shaft 86. When the trolly is pushed to the rear and the finger-lever is set in the forward position, the clamps grip the webs and the bights 98 are formed The finger-lever may be locked in the forward position by a latch 64 which catches a bell-crank 60, connected by a link 59 to the finger-lever. The latch is released automatically by engagement with an adjustable stop 69; a spring 70 then restores the finger-lever and the clamps to the normal position. The rails 75 are provided at each end with spaced rods 100, 102 for guiding the webs. The webs may be supported between the guides by a table 105 which is arranged between the ribs 77 and is supported by the rods 100. The bights may be supported on a table or plates 99 which are supported on the rods 100, 102. To permit of free lateral movement of the webs, the plates are formed without guide edges or are formed only with shallow guide-edges 103 at the rear. The frame 31 may be provided, as described in Specification 105,115, with cross bars, which serve to support the webs. (2). To facilitate the use of separate webs instead of the usual longitudinally folded web, pins 109 are provided for engagement with transverse rows of holes in the webs, such engagement causing the sides of the webs to be registered and also registering longitudinally the forms printed on the webs. The pins are formed with points which serve to draw the webs into register, and a pivoted plate 110, which can be swung down on to the webs, is provided for packing the webs on the pins. The pins are secured to a bar 113 formed on a frame 115 which carries pivotally the plate 110 and is mounted to slide on the usual bar 116 that carries the stop 18. Springs 114 hold the plate 110 either in the inactive position as shown or in the active position. When the webs have been impaled on the pins, the slide 115 is drawn forward until it is arrested by the stop 18, the webs being then severed by actuating the usual knife 19.