Abstract: A process for producing a drawing stencil characterized in that a plastic border edging is applied, by a spray or injection molding, upon a preformed stencil sheet. A further feature disclosed is the use of a lubricated interface between a border edging and a stencil sheet, to relieve stress buildup and resultant distortion of the stencil.

Abstract: The invention refers to an improved writing fluid cartridge or writing fluid tank with a connection section at the front end for attachment to a writer, especially a tube writer, wherein the cartridge is divided into at least two sealably separate compartments, one of which having an ink capacity equal to substantially the ink capacity of the writer body.

Abstract: Automatic drafting device of the type employing a tubular writing pen, particularly an adjustable sealing element which is used against the writing tip of the pen when the pen is in a retracted rest mode. The sealing element is laterally disengaged from the pen tip when the pen is an extended writing mode. The sealing element which may be in the form of an elastic spheroid prevents drying out of ink within the capillary channel when the pen is not in use. The blocking assembly is characterized by its ability both to lock the tubular writing pen in its rest position and to lock the sealing element in its laterally outward position so as to avoid interference with the pen during temporary moments of non-writing.