writing instrument

The cap design with a predefined recess for the applicator element in a writing instrument maintains a fluid-filled environment, addressing drying and clogging issues, ensuring immediate usability and prolonged application quality for diverse applicator types.

DE202024106995U1Active Publication Date: 2026-04-09STAEDTLER SE
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Patent Information

Application Number
DE202024106995
Authority / Receiving Office
DE · DE
Patent Type
Utility models
Current Assignee / Owner
Filing Date
2024-12-03
Publication Date
2026-04-09
Estimated Expiration
2034-12-31

AI Technical Summary

Technical Problem

Existing writing instruments face issues with the application element drying out and particulate components accumulating when not in use, especially for pens with low dimensional stability or brush-like tips, leading to clogging and reduced application quality.

Method used

A cap design with a porous insert element that has a predefined applicator-receiving recess, matching the shape and size of the applicator element, ensuring minimal deformation and fluid transfer, while maintaining a fluid-filled environment around the applicator to prevent drying and clogging.

Benefits of technology

The cap design effectively prevents drying and particulate accumulation, ensuring immediate usability and prolonged application quality by maintaining a fluid-filled atmosphere around the applicator, suitable for various applicator shapes and sizes.

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Abstract

Writing instrument comprising a pen (12) and a cap (16) for receiving a writing end (14) of the pen (12), wherein the pen (12) comprises: - a pen body (20) elongated in the direction of a pen longitudinal axis (S), - a fluid reservoir (22) arranged in the pen body (20) for fluid to be applied by means of the pen (12), - a porous application element (18) projecting from the writing end (14) of the pen (12) in the direction of the pen's longitudinal axis (S) beyond the pen body (20), wherein the application element (18) is in connection with the fluid reservoir (22) for receiving fluid from the fluid reservoir (22) by capillary action, the cap (16) includes: - a cap body (30) with a receiving end (32) open for receiving the writing end (14) of the pen (12), - an insert element (34) received in the cap body (30), wherein the insert element (34) has a permanently formed application element receiving recess (36) for receiving the application element (18) when the writing end (14) of the pen (12) is received in the cap (16), so that when the application element (18) is inserted into the application element receiving recess (36) and when the application element (18) is removed from the application element receiving recess (36) the shape and dimensions of the application element receiving recess (36) do not change substantially, wherein the applicator receiving recess (36) is adapted to a shape and size of the applicator (18) such that, when the writing end (14) is received in the cap (16), the applicator (18) is at least partially in contact with the insert element (34) in the area of ​​an inner surface (37) of the applicator receiving recess (36), and wherein the insert element (34) is formed to be porous at least in an area providing the inner surface (37) of the applicator receiving recess (36) such that it has capillarity for the fluid.
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