GB191206711A - Improvements in or relating to Pencils and Reservoir Pens. - Google Patents

Abstract

6711. Reiche, H. March 18. Pencil-holders; reservoir pens; lcads.-A pencil-holder is adapted to contain and to feed forward a filament of flexible marking-material ; the holder may also be provided with a valved chamber containing moistening-liquid, in which case soluble marking-material is used, and the device acts as a pencil or reservoir pen at will. The marking-material 29 is coiled within a watertight case 20, adapted to be revolved by a head 17 keyed to a tube 14, which is in turn keyed to the tube 36 on the case 20, so that the marking-material is fed forward, by the action of a fixed screw 31. An outer container 10 surrounds the case 20 and is adapted to contain water or other liquid, the outflow of which is controlled by a conical valve 26. The valve 26 and case 20 are mounted so as to be longitudinally movable in the container 10 to open or close the valve, the movement being controlled by a nut 19 on the tube 14, which is provided with a flange 34 coacting with a flange 33 on the end of the case 20. A spring 35 is interposed between the flange 34 and a fixed abutment 15, and a second weaker spring 39 acts between the flange 34 and a partition 38 in the case 20. Air is admitted to the container 10 by a valve 41 at the upper end of the pen and capillary openings 20<a> in the walls of the case 20, whilst a second valve 40, or a spring capillary-tube connected to the tube 36 and extending to the end of the stem of the valve 41, admits air to the case 20. When used as a stylographic pen, the nut 19 is rotated slightly to contract the spring 35, so that, on pressing the marking-material upon the writing- surface, the valve 26 is opened a little against the action of the spring 39, and a small quantity of liquid escapes. When used as a fountain pen, the nut 19 is further rotated to hold open the valve 26, and a nib 50, supported by three shorter fingers 43 which form a reservoir, is slid forwards by a ring 47 until enlargements 49 on the fingers engage a projection 12 at the front of the holder; in a modification, a nib with an attached bottom feed-tube is secured to the projection 12 by a series of spring fingers. The marking-material may consist of substances used in ordinary pencils &c., namely, graphite, carbon, lime, chalk, coloured pigments, aniline dyes, &c., with the addition of a suitable binder to cause the mass to become more or less flexible or elastic. If for use in a fountain pen, the binder may consist of a soluble mucilaginous or glutinous substance, but for use in a dry pencil or as a stylographic pen, the binder preferably consists of metallic lead. The ingredients are mixed either cold or in a molten state, highly compressed, and ejected through dies. In some cases, the material is formed in layers, for example, a central core of pigment surrounded by a metal shell deposited thereon electrically or chemically.