Société BIC Patente

A writing instrument (10) extending along an axis (X) and comprising a writing tip (14) and an eraser (16), a first helical cam propelling mechanism (18) configured to move the writing tip (14) along the axis (X) between a retracted position and a protruded position and a second helical cam propelling mechanism (20) configured to move the eraser (16) along the axis (X) between a retracted position and a protruded position, the first helical cam propelling mechanism (18) comprising a first cam follower (18A) and a first helical cam (18B), the second helical cam propelling mechanism (20) comprising a second cam follower (20A) and a second helical cam (20B), each of the first cam follower (18A), the first helical cam (18B), the second cam follower (20A) and the second helical cam (20B) being provided on distinct elements.

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The present invention concerns a polymer-based extrudable non-calcined pencil lead comprising a lamellar mineral filler having a lamellarity index greater than 2.8, advantageously greater than 3.5, in particular greater than 4. It also concerns a pencil comprising such a lead and the use of a lamellar mineral filler having a lamellarity index greater than 2.8 to improve the flexural resistance and/or the smoothness, and/or the vividness of a polymer-based extrudable non-calcined pencil lead.

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The present invention relates to a process for preparing an aqueous suspension of core-shell metal nanoparticles which essentially consist of metal, wherein the core of said nanoparticles comprises at least one of silver or copper and the shell of said nanoparticles comprises at least one of the other of silver or copper, wherein the metal nanoparticles are prepared by mixing at least one silver salt, at least one copper salt, a homopolymer or copolymer of vinylpyrrolidone at an amount from 0.1 to 1.1 weight% based on the total weight of the aqueous suspension, ascorbic acid, an alkali base, and water. The present invention further relates to an aqueous suspension of core-shell metal nanoparticles, a process for preparing an aqueous gel ink, and to an aqueous gel ink comprising core-shell metal nanoparticles.

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A computer implemented method (10) for computing a plurality of virtual texture waveform definitions, comprising: obtaining (11) first texture data (40) at least partially characterising a texture of an existing writing surface, obtaining (12) second texture data (42) at least partially characterising an intended texture experienced by a user when the haptic writing instrument when writing on the existing writing surface, generating (13) virtual texture data (44) by modifying the first texture data based on at least the second texture data, segmenting (14) the virtual texture data (44) into at least first (47a) and second (47b) regions representing, respectively, at least a first texture type (T1) and a second texture type (T2), generating (15) at least first (S1) and second (S2) virtual texture waveform definitions corresponding, respectively, to the first and second texture types, and outputting (16) at least the first and second virtual texture waveform definitions.

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The present invention concerns a kit comprising a) an aqueous writing ink composition, containing - metal nanoparticles as coloring agent wherein said metal nanoparticles essentially consists of metal and said metal is chosen from silver, gold, aluminum and/or copper and - a dispersing agent, and b) an eradicator fluid containing at least one oxidizing agent.It also concerns An aqueous eradicator fluid for erasing an aqueous writing ink composition containing metal nanoparticles as the coloring agent, in which said metal nanoparticles essentially consists of metal and said metal is chosen from silver, gold, aluminum and/or copper, said fluid containing - an oxidizing agent chosen in the group consisting of hydrogen peroxide H₂O₂, oxygen, compounds capable of producing hydrogen peroxide by hydrolysis selected among nitric acid, organic peroxide, urea peroxide, alkali metal bromates and perborates, permanganate, and mixtures thereof and - a volatile solvent.It further concerns a writing instrument containing the eradicator fluid, the use of the eradicator fluid and/or of the kit containing it and a method of correcting errors of a written mark made on porous substrate.

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A method (100) of manufacturing a metallic ball pen tip (14) for a writing instrument (10) comprising a feeding passage (26) extending in an axial direction, the feeding passage reaching in a housing (28) configured to receive a ball (24), the housing being defined by a cylindrical wall (30) and a ball seat (40), wherein the ball seat comprises a plurality of feeding grooves (38), and wherein the ball seat is textured, the method comprising the steps providing (102) a preform (14A) of the metallic ball pen tip comprising the feeding passage (26) and a housing preform (28A), the housing being defined by the cylindrical wall (30) and a ball seat preform wall (32), machining (104) the ball seat preform wall so as to obtain a stepped wall (34), broaching (106) feeding grooves (38) in the stepped wall and coining (108) the stepped wall (34) with a spherical die (54) so as to obtain the ball seat (40).Also disclosed is a metallic ball pen tip obtained by the method.

A writing instrument (10) comprises a body (100), a first data handling subsystem (200) arranged in the body (100) and configured to transmit and/or receive data, and a haptic feedback subsystem (400) arranged in the body (100) and configured to receive data from the first data handling subsystem (200). The haptic feedback subsystem (400) is configured to provide a haptic feedback to a user (U) based on data received from the first data handling subsystem (200).

A writing felt pen (10) including a barrel (12) and a nib (14) attached to the barrel (12), and a deformable pouch (24) comprising a mix (16) of absorbent polymer (18) and fibres (20), an ink being absorbed in the absorbent polymer (20) and the nib (14) being in fluidic communication with the mix (16).

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The present disclosure provides a handle for razor made of polylactic acid (PLA) with another bioplastic polymer such as polybutylene succinate (PBAT), bio-polyethylene (bio-PE), and polybutylene succinate (PBS), combined with vegetable fillers chosen in the group consisting of wood, wheat, flax, and seagrass. The present disclosure also provides a method for manufacturing such handle, a razor including such handle, and a skincare kit including such handle.

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