Patent GB-632467-A (GB)
Title: Improvements in and relating to attachments for use with type-writing machines
IPC: B41J17/00
Filed: 1947-11-18
Abstract: 632,467. Typewriters &c. LAMSON PARAGON SUPPLY CO., Ltd. Nov. 18, 1947, No. 30580. Convention date, Nov. 22, 1946. [Class 100 (iv)] In a typewriter attachment for accommodating a number of continuous paper webs adapted for dividing into sheets and interleaved carbon papers, the carbon papers are fixed to one end of a paper web guide which moves transversely with a carriage of the typewriter and the end of the guide is movable towards and away from the platen through at least the length of a sheet. As shown in Fig. 1 the guide 11, pivoted at 10. so that its end is movable towards the platen, carries a slide 26 displaceable thereon having paper web gripping means which is operable by two control abutments 39, 40 so that at the end of the path of displacement of the slide remote from the fixing of the carbon papers 24, the abutment 39 causes the gripping means to hold the paper webs 18, and at the other end of the path the other abutment 40 causes the paper webs to be released. The guide is mounted on a carriage 5 linked by a strap 8 to the typewriter carriage 7 so that it travels therewith supported on roller trackways 4 connected to frame 1 of the machine. The carriage 5 stores the webs 18 in a folder pile which is led upwardly over the paper guide 11, through the gripping means on slide 26, and over a roller 20 to the platen 21. The paper guide 11, is urged about its pivot 10 into a raised position by tension springs and has a pair of rails 25 along which the slide 26 travels with the aid of rollers. The path of the slide is limited by a pair of stops 28 at the lower end of the guide 11 and by stops 29 adjustably positioned in holes 30 at the upper end to accommodate various sizes of sheets. The slide 26 carries the gripping means comprising an L-shaped rail 31 transversely extending over the guide 11 and which coacts with a pivoted rail 32 which is spring-held, either vertically against the rail 31 to grip the webs 18 threaded therebetween, or is held horizontally in respect to the guide, allowing free movement of the webs. The two positions of the rail 32 are determined by a bell-crank lever 38 pivoted to the slide at 36, and is engaged by the control abutments 39, 40, spring-mounted on a bar 42 which is slidable in brackets 44, suspended from the guide by a lever 45, Fig. 8, pivotally attached to the carriage 5 so that as the guide 11 is raised or lowered, the bar 42 is moved rightwardly or leftwardly respectively. In operation, the papers 18 are threaded through the slide and interleaved with the carbon papers 24 anchored on pins 22 at the end of the guide, which is adjusted to the raised position, as shown in Fig. 1, by a screw 17 so that the carbon papers 24 do not quite reach the platen, and the slide 26 is moved into its upper position with the rails 31, 32 closed to grip the webs at preferably a sheet-separation point. With the commencement of typing, the rotation of the platen for line spacing pulls on the carbon papers and lowers the guide 11, which causes the bar 42 to move upwardly, Fig. 5, and very soon abutment 40 engages the crank 38, thus releasing the grip on the webs and the slide 26 runs down to the bottom of the guide, Fig. 8. The guide meanwhile is held against vertical movement by the platen gripping the carbon papers 24 and as typing proceeds draws the guide downwardly into horizontal position. After typing is completed the guide is raised by the tension springs upon unwinding or releasing the platen 21, and as the guide is raised the bar 42 moves rightwardly, Fig. 8, and abutment 39 engages crank-arm 38, which causes rail 32 to again grip the webs, whereupon the webs are wound forwardly until the slide reaches the upper stop 29 and the sheets are then torn off. The guide is retained in the raised position during this latter movement by its tensionsprings, since the carbon papers 24 are not gripped by the platen.