Patent GB-387579-A (GB)
Title: Improvements in carbon copying systems
IPC: B41L1/16
Filed: 1932-06-21
Abstract: 387,579. Typewriters. LACROIX, G. U., 76, Howard Street, Holyoke, Massachusetts, U.S.A. June 21, 1932, No. 17543. [Class 100 (iv).] Carbon-paper arrangements.-A set of carbon or transfer papers, more particularly for use in typewriters &c., comprises a plurality of transfer sheets, a reinforcing sheet relatively longer than the transfer sheets and extending below their lower edges, means for securing the transfer sheets and reinforcing sheet together, and combined guide and stop strips for copy sheets secured to the side portions of the reinforcing sheet which extend below the bottom edge of the transfer sheets. Each transfer sheet 1, Figs. 1 and 6, is cut away at 5 to facilitate the removal of the copy sheets 15, and is formed with spaced openings 6 to correspond with similar openings in the copy sheets for the purpose of alignment. Each bottom edge of the transfer sheets is folded back for strengthening purposes and to facilitate the entrance of the copy sheets, and as a further guiding means for the copy sheets the transfer sheets are of different lengths as shown at 8. Each transfer sheet 1 is widened at 2 where they are secured together and to a reinforcing sheet 9 by means of stitches 10. Combined guide and stop strips 16 are secured by stitches 10 to the side edges 17 of the projecting portion 12 of the sheet 9. Each strip is formed with a marginal spacing strip, wedge-shaped at both ends 19, and integral inwardly extending guide flaps 20 forming a channel through which the side edges of the copy sheets 15 are drawn as they are pulled between the transfer sheets 1. In operation the original and copy sheets 15 of a set of manifold or pack-folded forms are positioned in the transfer sheets, the assembled unit inserted in a typewriter &c., and records printed thereon. On completion of the records the typewriter will have fed the unit upward until the wedgeshaped end portions 19 of the guide and stop strips 16 have engaged the platen 23 and friction rolls 24, Fig. 6, thereby preventing further upward movement. On the tension of the platen being released the copy sheets 15 may be pulled, by grasping them in the area 5, around the platen and through the transfer sheets until the perforated line indicating the division of the sets of sheets appears at the top of the transfer sheets. The platen may then be reversed to bring the new set of copy sheets into printing position, and the typed set torn off. In a modification, shown in Fig. 8, the transfer sheets 1<3> are secured to a short reinforcing strip 261 by threads or staples 27 with the top of the latter located a short distance above the side extensions 2. Spacing and aligning strips 29 are secured at each side of the strip 26<1> near the bottom edge 30, and a guide strip 31, secured to the strips 29 by threads or staples 29<1>, extends across and is spaced from the strip 26<1>. The upper edge 32 of the strip 31 is bent down towards the strip 26<1> thus forming a resilient member for holding the paper against the strip 26<1>. The side edges of the forms are guided by the strips 29 as before. In operation the strips 29 engage the platen and a back-plate in the typewriter &c. to prevent movement of the transfer set during the withdrawal of the forms. The corners of the transfer sheets and, where necessary, the reinforcing sheets are rounded at 13 to facilitate alignment of the copy sheets and assist in their removal.