Nib units for pens
AssigneeEsselte UK Limited
InventorsMartin Edward Dowzall, Vazgen John Houssian
Life of this patent
Estimating the term…
Abstract
Fine lines, for example, 0.5 to 0.8 mm wide, can be produced by the use of an auxiliary nib unit which fits over a main nib on a felt or Fiber tip marker or on a technical pen. The auxiliary nib is a friction fit in its housing. The marker cap may contain a receptacle for storage of the auxiliary nib. The auxiliary nib is movable axially of its housing so as to come into ink-transfer contact with the main nib irrespective of wear or distortion of the latter. The main nib may be of fibrous material, and the auxiliary nib may be a hollow extrudate of plastics material.
Claims12
A nib conversion unit for converting a marker implement having a fixed main nib of one size into an implement with an effective auxiliary nib of smaller size, the unit comprising a housing adapted to engage detachably the end of the implement adjacent to the main nib, the housing carrying a thin auxiliary nib adapted, when the housing is so engaged, to enter into liquid communication with the main nib and to project from the housing to operate as capillary-fed nib, the main nib being subject to wear such that a gap may be created between the main nib and the thin auxiliary nib, thereby preventing liquid communication between the main and auxiliary nibs,
- said auxiliary nib being movable axially of the housing, whereby it may be moved into ink-transfer contact with the main nib by force applied to the tip of the auxiliary nib, thereby closing any gap which may be created between the main and auxiliary nibs due to wear of the main nib.
Dependencies are inferred from the claim text.