Nib for writing and methods for treating a longitudinal...

B - Operations – Transporting – 43 – K

Patent

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B43K 1/12 (2006.01)

Patent

CA 2370903

The nib is constituted by a segment of a coherent, elongate element of high porosity material, with at least a first end shaped to form a writing tip. The pores and/or capillaries of said material are blocked over a limited thickness e, in particular in the range 0.01 mm to 1 mm, at the longitudinal outer periphery of the elongate element, with the exception of the first end forming a writing tip. In a first variant, blocking is obtained by a sealing agent and performed by continuously impregnating the elongate element with a sealing bath, and setting the agent. In a second variant, the nib is constituted by sintered microbeads and blocking is obtained by localized hot-melting of the microbeads.

La pointe d'écriture est constituée d'un tronçon d'un élément longiforme cohérent d'un matériau de grande porosité, avec au moins une première extrémité conformée en tête d'écriture. Les pores et/ou capillaires dudit matériau sont obturés sur une épaisseur <u>e</u> limitée, notamment de l'ordre de 0,01 à 1mm, sur la périphérie extérieure longitudinale de l'élément longiforme à l'exception de la première extrémité en tête d'écriture. Selon une première variante, l'obturation est obtenue par un agent colmatant (15) et réalisée par imprégnation continue de l'élément longiforme (2) par un bain colmatant (6) et durcissant de l'agent. Selon une seconde variante, la pointe est constituée de microbilles frittées et l'obturation est obtenue par thermofusion localisée des microbilles.

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