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US 11,117,415 B2Granted
Free ink writing instrument with microfluidic valve
AssigneeSociete BIC
InventorsOlivier Albenge, Laudine Buge, Christelle Debrauwer, Anne-Lise Damiano, Claire Evrard
Life of this patent
Estimating the term…
Abstract
A writing instrument including a main body provided with a writing tip. The writing tip being supplied with ink by a free ink-type reservoir equipped with a pressure regulating device for regulating the pressure within the reservoir. The pressure regulating device includes at least one microfluidic valve.
Claims15
A writing instrument comprising:
- a main body provided with a writing tip, the writing tip being supplied with ink by a free-ink reservoir, the free-ink reservoir being provided with a pressure regulating device for regulating the pressure within the free-ink reservoir, the pressure regulating device including at least one microfluidic valve arranged in a gas circuit disposed between an inside and an outside of the free-ink reservoir,
- wherein the microfluidic valve includes an inlet chamber, an outlet chamber and a regulating chamber, the inlet chamber and the outlet chamber being adjacent and separated by a wall, the wall having a projection that extends towards an inside of the inlet chamber.
A writing instrument comprising:
- a main body including with a writing tip and a detachable cap configured to protect the writing tip in a protection position, the writing tip being supplied with ink by a free-ink reservoir, the reservoir being provided with a pressure regulating device for regulating a pressure within the reservoir, the pressure regulating device including a baffle and/or a porous or fibrous element, the cap being provided with at least one microfluidic valve for regulating a pressure inside the cap in the protection position,
- wherein the microfluidic valve includes an inlet chamber, an outlet chamber and a regulating chamber, the inlet chamber and the outlet chamber being adjacent and separated by a wall, the wall having a projection that extends towards an inside of the inlet chamber.
Dependencies are inferred from the claim text.