Patent GB-413764-A (GB)
Title: Improvements in or relating to writing implements
IPC: B43K8/14
Filed: 1933-01-31
Abstract: 413,764. Stylographic pens. KENT, A. F. S., Holm Ray, Iron Acton, near Bristol. Jan. 31, 1933, Nos. 2941 and 6007. [Class 146 (iii).] A self - filling stylograph pen is provided with a solid writing- point associated with a feed-bar, air-channels being provided in either or both the feedbar and the surrounding pointsection, and inkchannels being formed on or in the point and completed, if necessary, by other channels in the feed-bar. The point is of the type described in Specification 364,808, and consists of a member divided longitudinally into separate parts or of a number of separate elements such as wires, grouped together to form capillary channels, rounded and polished at the writing-end, and connected together for a portion of their length by soldering or other means to control the rigidity ; the point may be surrounded by a tube which may conform to the contour of the elements, and the tube may be formed with one or more internal constrictions or projections to control the flow of ink. The point e, Fig. 2, is preferably secured in position in an axial passage in the feed-bar d, but may be yieldingly mounted to facilitate movement of the tip over the surface. The feed-bar need not completely surround the point, but may be in the form of wings or projections at the forward end. Means may be provided for preventing inward movement of the point, and for preventing closing of the feed-passage in case the feed-bar is formed of insufficiently rigid material. The passage in the feed-bar may be continued directly through a passage c<1> in the point-section c into communication with the collapsable-sac reservoir b, or may be connected with the passage c<1> by means of a radial passage f<3> and a longitudinal spiral, or tortuous groove f<2> formed in, or in association with, the feed-bar. The bottom of the ink-feed channels may be grooved to facilitate flow, and the flow may be controlled by means of slots extending from the rear end of the feed-bar into communication with the point, the slots overlapping for a part of their length on being arranged at an angle to each other. Local reservoirs for ink may be formed in the feed-bar or point-section. The flow may also be regulated by the provision of a siphon arrangement either in the reservoir or in the passages formed in the feed-bar, or by the provision of a short length of tube adjustable on the point. An air passage f on the feed-bar may communicate directly with the reservoir through the passage c or through an air-tube g, g<1> arranged centrally or otherwise in the sac. The air-tube extends nearly to the rear end of the sac to facilitate filling, and is formed of soft rubber so as not to interfere with the action of the self-filling mechanism. The feed-bar may be provided with a coned rear end d<6>, Fig. 42, which on application of a cap s is forced against the action of a spring t, to close the ink-feed aperture c<1>. Alternatively, grooves may be formed in the point section and feed-bar to overlap for a small part of their length, so that relative rotation or longitudinal movement of the point-section and feed-bar will interrupt the communication and stop the flow of ink. According to one of the Provisional Specifications, the point may be formed of a piece of fluted wire or metal strip and wires or strips may be laid in the grooves, or the point may be made from a metal tube slit and bent inwardly at the free end to form a rounded tip with an interval feed-channel.