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US 5,207,523 AGranted
Writing implement with forward and rearward seals
AssigneeIntergraph Office Innovation N.V.
InventorGotz-Ulrich Wittek
Life of this patent
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AssigneeIntergraph Office Innovation N.V.
InventorGotz-Ulrich Wittek
Estimating the term…
The writing implement comprises a sleeve-shaped housing (1) in which an inner sleeve (7) is disposed includes a writing element (2). At the tip-side end of the inner sleeve (7) is disposed a hermetic closure portion (8) which comprises a plurality of segments (34) which are biassed radially outwardly and which in the closure position (FIG. 7 ), bear on each other forming a seal beyond the nib (26) and which are provided with sealing bead segments (23) which also bear on each other forming a seal behind the tip of the writing element (26) and which bear on the tip segment (4) of the writing element (2), so that the nib portion (26) of the writing element is closed in an overall hermetically sealing chamber (6). The writing implement uses a mechanism which facilitates, while pressing the actuating element (11), the premature opening of the closure element (8) before the exit of the writing element (2) therefore avoiding contact with the nib (26 ). The co-ordination between closure portion (8) and writing element (2) can be reached by several means.
A writing implement comprising:
In a writing implement of the type having a reservoir of ink and a writing point fluidically coupled to said reservoir and having the characteristic of having a quantity of evaporatable ink contained in said reservoir and exposed on said writing point, and having an actuator mechanism for urging said writing point into and out of a pen housing, the improvement comprising a plurality of tipward sealing segments and a plurality of cooperating rearward sealing segments which are urged toward each other and said writing point by a metal spring in response to a first actuation of said actuator to form a small airtight chamber around said writing point and are separated from each other in response to a second actuation of said actuator to allow said writing point to extend therefrom during writing.
Dependencies are inferred from the claim text.