EP3638513A1 - Instrument d'écriture à encre libre comprenant une valve microfluidique - Google Patents
Instrument d'écriture à encre libre comprenant une valve microfluidiqueInfo
- Publication number
- EP3638513A1 EP3638513A1 EP18749433.1A EP18749433A EP3638513A1 EP 3638513 A1 EP3638513 A1 EP 3638513A1 EP 18749433 A EP18749433 A EP 18749433A EP 3638513 A1 EP3638513 A1 EP 3638513A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- writing instrument
- microfluidic
- reservoir
- pressure
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000001105 regulatory effect Effects 0.000 claims abstract description 41
- 230000002457 bidirectional effect Effects 0.000 claims description 34
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 14
- 239000012528 membrane Substances 0.000 description 8
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 239000002904 solvent Substances 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000002028 premature Effects 0.000 description 3
- 238000009736 wetting Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000000935 solvent evaporation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K5/00—Pens with ink reservoirs in holders, e.g. fountain-pens
- B43K5/18—Arrangements for feeding the ink to the nibs
- B43K5/1818—Mechanical feeding means, e.g. valves; Pumps
- B43K5/1827—Valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
- B43K23/08—Protecting means, e.g. caps
- B43K23/12—Protecting means, e.g. caps for pens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K7/00—Ball-point pens
- B43K7/02—Ink reservoirs; Ink cartridges
- B43K7/03—Ink reservoirs; Ink cartridges pressurised, e.g. by gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K7/00—Ball-point pens
- B43K7/10—Arrangements for feeding ink to the ball points
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K8/00—Pens with writing-points other than nibs or balls
- B43K8/02—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material
- B43K8/04—Arrangements for feeding ink to writing-points
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K8/00—Pens with writing-points other than nibs or balls
- B43K8/14—Pens with writing-points other than nibs or balls with coreless tubular writing-points
- B43K8/143—Arrangements for feeding the ink to the writing-points
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K8/00—Pens with writing-points other than nibs or balls
- B43K8/16—Pens with writing-points other than nibs or balls with tubular writing-points comprising a movable cleaning element
- B43K8/18—Arrangements for feeding the ink to the writing-points
Definitions
- Free ink writing instrument including a valve
- the invention relates to the field of writing instruments called "free ink”, and more particularly a pressure regulating device for a free ink writing instrument.
- a “free ink writing instrument” or a “free ink tank writing instrument” is a writing instrument in which the ink is free to circulate in the tank.
- the ink travels instantly on one side or the other of the tank, for example under the effect of gravity.
- the ink is likely to move when manipulating the writing instrument or that the writing instrument is moved.
- a known solution is to equip such a writing instrument with a baffle, a porous element and / or a fibrous element connected (s) to a pressure regulating channel.
- this pressure regulating channel generally opens in the vicinity of the writing tip.
- the baffle / porous element / fibrous element can no longer perform its regulating function pressure. This is particularly problematic when the writing instrument is subjected to an environment inducing large pressure variations between the inside and the outside of the ink tank, such as for example in an airplane or exposed in direct sunlight in a car. .
- An embodiment relates to a writing instrument comprising a main body equipped with a writing tip, the writing tip being fed with ink by a free ink tank, the tank being equipped with a pressure regulating device for regulating the pressure within the tank, the pressure regulating device comprising at least one microfluidic valve.
- the free ink reservoir may be formed by the main body of the writing instrument (i.e. the gripping body), or by a separate cartridge of the main body.
- valve means "the at least one valve”.
- microfluidics is the science and technology of systems handling fluids and at least one of the characteristic dimensions is of the order of a micrometer. In this order of magnitude, some negligible phenomena when considering orders of magnitude higher (ie by a factor of 10 or more) become preponderant, as for example the capillarity while other phenomena, such as for example gravity become negligible whereas they are preponderant when considering orders of magnitude higher.
- Microfluidic systems are generally characterized by a small Reynolds number (ratio between inertia forces and viscosity forces): viscosity forces are predominant.
- the science of microfluidics has several facets that are not limited to the flow of fluids.
- a basic microfluidic function is the actuation of fluids: this term covers the injection, the controlled displacement and the various operations performed on the fluid.
- These functions are implemented by a variety of elementary microfluidic components, such as microfluidic valves.
- microfluidic valves such as a microfluidic valves.
- microfluidic pumps such as a microfluidic pump, microfluidic mixers, etc.
- Microfluidic elements are currently mainly used in the field of biology / microbiology.
- microfluidic valve With the microfluidic valve, the phenomena of gravity being negligible in the face of capillary phenomena, it is possible to regulate the pressure within the ink tank while avoiding ink leakage (resulting for example from a flow of gravity ink).
- the inventors have surprisingly found that microfluidic valves, which are usually implemented in a hydraulic circuit in the field of biological / microbiology, can also be used for gas circuits, and that even with relatively low gas flow rates (the passage sections being of the order of one micrometer), the microfluidic valves allow a satisfactory regulation of the pressure between the inside and the outside of the gas reservoir. 'ink.
- the microfluidic valve being closed "by default", that is to say as long as the pressure difference between the outside and the inside of the tank does not reach a predetermined threshold, evaporation of the solvents is avoided. ink while ensuring satisfactory pressure regulation within the ink tank. It is thus understood that to avoid an ink flow, the microfluidic valve opens when the pressure inside the tank becomes greater than a predetermined threshold relative to the pressure outside the tank to balance the pressure between outside and inside the tank, and remains closed otherwise.
- the pressure regulating device according to the present disclosure is a passive regulating device (ie which does not require a supply of external energy, in particular electrical energy, to operate).
- the microfluidic valve comprises only openings opening into the reservoir and into the external environment of the reservoir (ie the surrounding air) distinct from the supply circuit ink of the writing tip.
- the external environment of the tank ie the surrounding air
- the gas circuit in which the microfluidic valve is disposed between the inside and the outside of the tank is distinct from the ink supply circuit of the writing tip, this circuit being supplied with ink by the tank.
- the microfluidic valve has a pressure difference between the outside and the inside of the opening reservoir predetermined threshold of overpressure, for example greater than or equal to 25 mbar (twenty-five millibars).
- the microfluidic valve opens only if the pressure inside the tank relative to the outside of the tank is greater than the pressure difference threshold predetermined opening of overpressure, and remains closed when the overpressure is lower than the predetermined opening threshold pressure difference of overpressure. This ensures that the possible pressure inside the tank remains at a predetermined level.
- an opening pressure excess pressure difference of greater than or equal to 25 mbar an acceptable maximum overpressure level is ensured in order to avoid unwanted flows of the ink while reducing as much as possible the opening occurrences of the microfluidic valve to prevent phenomena of premature fatigue of the microfluidic valve and premature evaporation of ink solvents, such evaporation being detrimental to the quality of the ink over time.
- the microfluidic valve has a pressure difference between the outside and the inside of the opening tank predetermined threshold of depression, for example greater than or equal to 25 mbar (twenty-five millibars).
- the microfluidic valve opens only if the vacuum inside the tank relative to the outside of the tank is less than the difference in pressure threshold of predetermined opening of depression, and remains closed when the depression is greater than the predetermined opening pressure threshold depression. This ensures that the possible depression inside the tank remains at a predetermined level.
- a threshold pressure difference of depression less than or equal to 25mBars, a maximum acceptable level of depression is ensured in order to ensure sufficient supply of the ink tip by preventing the ink flow rate from being broken up at the tip, while reducing as far as possible the occurrences of opening of the microfluidic valve in order to avoid phenomena of premature fatigue of the microfluidic valve.
- the pressure difference between the outside and the inside of the opening tank predetermined threshold of overpressure and the pressure difference between the outside and the inside of the predetermined threshold opening tank depression have the same value.
- Such a choice has the advantage of facilitating the manufacture of the writing instrument. Indeed, no particular care is to be taken to distinguish the valves during their assembly, so that the manufacture is facilitated and associated costs controlled.
- the microfluidic valve is isolated from the interior of the reservoir by a gas permeable and liquid impermeable member.
- permeable element is understood to mean “gas-permeable and liquid-impermeable element”. It is understood that this permeable element is disposed, according to the fluid circuit, between the chamber of the ink tank and the microfluidic valve.
- Such a permeable element allows to ensure that only gas circulates within the microfluidic valve, but not liquids. This reduces the risk of ink leakage via the microfluidic valve.
- the microfluidic valve includes a portion disposed on the inner side of the reservoir, said portion comprising a non-wettable coating.
- the portion is a channel opening into the chamber of the ink tank, a chamber of the microfluidic valve disposed on the side of the tank relative to the movable member (or valve) of the microfluidic valve (in general a membrane), or the surface of the movable element disposed on the side of the chamber of the tank.
- the inner side of the reservoir is considered relative to the movable member of the microfluidic valve.
- a portion of the microfluidic valve disposed on the inside of the reservoir is a portion disposed, according to the fluid circuit within the microfluidic valve, between the inside of the reservoir and the movable member of the microfluidic valve.
- non-wettable coating is meant a coating that can not be wet (see partial wetting or no wetting).
- a hydrophobic or oleophobic coating is a coating that can not be wetted by an aqueous solution or an oil, respectively.
- the writing instrument comprises a removable cap configured to protect the writing tip in a protective position, the cap covering a protected portion of the main body in the protective position, the microfluidic valve. comprising at least one channel opening out of the main body, said channel opening into a part of the main body separate from the protected part.
- the microfluidic valve is always in fluid contact with the outside of the reservoir. which is at atmospheric pressure, whereby the pressure regulation within the tank between the inside and the outside of the tank is ensured whatever the configuration of the writing instrument (writing tip protected by the cap or not), which improves the robustness of the writing instrument vis-à-vis the ink flows.
- the pressure regulating vent is disposed in the vicinity the writing tip so that this vent is cut off from the outside environment of the pen when the writing tip is protected by the cap.
- the pressure regulation can take place only if the cap is removed (i.e. the regulation does not take place when the cap protects the writing tip). Therefore, when there is a large variation in the surrounding pressure, for example during an air travel, ink flows can occur, even in the presence of baffle.
- the microfluidic valve comprises three distinct chambers, namely an intake chamber, an evacuation chamber and a regulation chamber, the admission and evacuation chambers being adjacent and separated by a wall, said wall having a projection extending inwardly of the inlet chamber.
- the inlet chamber is the chamber through which the gas enters in case of pressure regulation
- the control chamber is the chamber which is permanently in fluid communication with the reference environment for the regulation of the pressure
- the evacuation chamber is the chamber through which the gas escapes in the event of pressure regulation.
- the pressure regulating device comprises only at least one microfluidic valve.
- the pressure regulating device comprises one or more microfluidic valves, and no other element for regulating the pressure. This reduces the manufacturing costs of the writing instrument.
- the writing instrument comprises a plurality of microfluidic valves while the reservoir extends in an axial direction and a circumferential direction, the microfluidic valves being distributed in the axial direction and / or according to the circumferential direction of the tank.
- Such a distribution microfluidic valves ensures that there is in all circumstances a microfluidic valve that is not blocked by ink. In other words, it is ensured that there is always a microfluidic valve opening directly on a gaseous part within the ink tank. This improves the regulation of the pressure within the tank, and the reliability of the control device vis-à-vis ink leaks.
- the microfluidic valves are regularly distributed in the axial direction and / or in the circumferential direction of the tank.
- the microfluidic valves are distributed along a helical curve around the axial direction on the tank wall.
- the at least one microfluidic valve comprises a bidirectional unit of microfluidic valves.
- a bidirectional unit may comprise either two different unidirectional microfluidic valves, whose fluid flow directions are opposite (ie a valve allowing a flow from the inside to the outside of the tank only, the other valve allowing a flow from the outside to the inside of the tank only), or a bidirectional valve (ie a valve behaving as the combination of two separate unidirectional valves whose opposite direction of fluid circulation are opposed), or a combination of unidirectional and bidirectional valves.
- Such a bidirectional unit ensures in the tank both a predetermined overpressure level that a predetermined vacuum level. This makes it possible to improve the reliability of the writing instrument on the one hand by preventing any risk of ink leakage and, on the other hand, by preventing any excessive depression which would penalize the feeding of the ink writing tip.
- the pressure regulating device comprises a baffle and / or a porous or fibrous element, the at least one microfluidic valve being unidirectional.
- the microfluidic valve makes it possible to regulate the pressure within the ink tank when the baffle and / or a porous or fibrous element are inoperative, for example when the writing tip is protected by a hood. In this case, to optimize costs, it is not necessary to provide a bidirectional valve, a one-way valve being sufficient (for example to avoid only overpressure within the tank).
- An embodiment relates to a writing instrument comprising a main body equipped with a writing tip, and a removable cap configured to protect the writing tip in a protective position, the writing tip being supplied with ink by a free ink tank, the tank being equipped with a pressure regulating device for regulating the pressure within the tank, the pressure regulating device comprising a baffle and / or a porous or fibrous element, the cap being equipped with at least one microfluidic valve for regulating the pressure inside the cap in the protective position.
- the baffle and / or the porous or fibrous element performs its pressure regulating function within the ink tank even when the cap is closed, while avoiding solvent evaporation of the ink (the microfluidic valve being closed by default).
- FIG. 1 represents a first embodiment of a writing instrument
- FIG. 2A represents a bidirectional unit of microfluidic valves according to the magnifying glass IIA of FIG. 1
- FIGS. 2B and 2C represent two distinct states of this bidirectional unit of microfluidic valves
- FIG. 2D represents a sectional view according to the IID plane. of Figure 2A,
- FIG. 3 represents a second embodiment of a writing instrument
- FIG. 4 represents a third embodiment of a writing instrument
- FIG. 5 represents a fourth embodiment of a writing instrument
- FIG. 6 represents a fifth embodiment of a writing instrument
- FIG. 7 shows a sixth embodiment of writing instrument.
- FIG. 1 represents a first embodiment of a writing instrument 10.
- the writing instrument 10 comprises a main body 12 equipped with a writing tip 14.
- the main body 12 has an internal cavity and forms a reservoir 12 free ink, where the ink 13 is free to move.
- the main body and the tank are formed by the same piece, alternatively the main body and the tank can be formed two separate pieces.
- the reservoir 12 is equipped with a pressure regulating device 16 for regulating the pressure within the reservoir 12.
- the pressure regulating device 16 comprises a single bidirectional unit of microfluidic valves 18.
- the reservoir 12 extends in an axial direction X and a circumferential direction C.
- the writing tip 14 is disposed on a first end 12A in the axial direction X of the reservoir 12.
- the bidirectional unit of microfluidic valves 18 is disposed on the second end of the reservoir 12, opposite the first end in the axial direction.
- This second end 12B is formed by a plug 13 which is sealed in this example by welding, on the tubular portion 12C of the tank 12.
- Such a configuration reduces manufacturing costs, only the plug 13 being equipped with a bidirectional unit of microfluidic valves 18.
- the writing instrument 10 also comprises a removable cap 20 which is shown in Figure 1 in the protective position of the tip 14. In this position, the cap 20 covers a portion of the main body 12, this part forming a so-called protected part.
- the channels described below of the bidirectional unit microfluidic valves 18 which open out of the tank 12, open into a separate portion of the portion protected by the cap 20.
- FIGS. 1, 3, 4 and 5 the bidirectional units of microfluidic valves 18 are represented in a symbolic manner whereas in FIGS. 2A, 2B and 2C the bidirectional units of microfluidic valves 18 are represented in their schematic diagram.
- Figures 2A, 2B and 2B more specifically represent a bidirectional valve comprising two different entities 18A and 18B.
- the valve comprises only one or more similar entities, the valve is said to be unidirectional.
- the valve includes two different types of entities, as shown on 2A, 2B and 2C, the valve is bidirectional.
- a bidirectional unit of microfluidic valves comprises either one or more bidirectional valves (as for example the valve shown in FIGS. 2A, 2B, 2C), or two unidirectional valves whose possible fluidic flow directions are opposite, or a combination of valves bidirectional and unidirectional valves.
- the 18B has substantially the same three-chamber structure 19A, 19B and 19C, a membrane 23 fluidly separating the default chambers (position shown in Figure 2A), the chambers being respectively connected to a channel.
- the chamber 19A forms an inlet chamber 19A, through which the gas enters in case of pressure regulation via a channel 21A.
- the channel 21A opens into the tank while in the entity 18B the channel 21A opens outwardly of the tank.
- the chamber 19B forms a control chamber 19B in fluid communication with the outside by a channel 21BA, reference medium for the regulation of the pressure inside the tank.
- the chamber 19C forms a discharge chamber 19C through which the gas escapes in the event of pressure regulation via a channel 21C.
- the channel 21C opens out of the tank while in the entity 18B the channel 21C opens into the tank.
- the intake and exhaust chambers 19A and 19C are adjacent and separated by a wall 24 while the chamber 19B is next to the chambers 19A and 19B and opens in rooms 19A and 19B.
- the membrane 23 is disposed between the chambers 19A and 19C on the one hand and the chamber 19B on the other hand. The membrane 23 cooperates in abutment against the wall 24.
- Figure 2D shows the shape of the wall 24, seen in cross section, parallel to the membrane.
- the wall 24 has a projection 24A extending inwardly of the inlet chamber 19A.
- the projection has a protruding form of stop, the angle of the stop being for example between 45 ° and 120 °.
- the projection 24A extends over the entire height H of the wall 24 (see Figure 2A).
- the side of the walls 24 disposed on the side of the evacuation chamber 19C do not project, but could, alternatively, also have a similar or not to the projection 24A.
- a gas-permeable and liquid-impervious element 22 is disposed on the bidirectional unit of microfluidic valves 18, on the inner side of the reservoir 12 and isolates it from the interior of the reservoir.
- the walls of the channels 21A and 21BB opening on the inside of the tank 12 comprise a non-wettable coating (not shown).
- the entity 18A avoids an overpressure within the tank 12 and puts in fluid communication the inside and the outside of the tank if the difference between the pressure Pint inside the tank 12 and the pressure Pext outside the tank 12 becomes greater than a first predetermined threshold value ⁇ 1 (ie a pressure difference between the outside and the inside of the opening tank predetermined threshold of overpressure).
- a first predetermined threshold value ⁇ 1 ie a pressure difference between the outside and the inside of the opening tank predetermined threshold of overpressure.
- ⁇ 1 25mBars.
- ⁇ 1 is a positive value or zero.
- FIGs 3, 4 and 5 are other embodiments of the writing instrument which differ from the writing instrument 10 of Figure 1 only by the number and arrangement of bidirectional microfluidic valve units.
- the second embodiment of the writing instrument 10 'of FIG. 3 comprises a plurality of bidirectional units of microfluidic valves 18 regularly distributed in the axial direction X of the tank 12.
- each bidirectional unit of valves Microfluidics 18 is spaced 1 cm (one centimeter) in the axial direction X from bi-directional units of adjacent microfluidic valves 18.
- the third embodiment of writing instrument 10 "of FIG. 4 comprises a plurality of bidirectional units of microfluidic valves 18 regularly distributed in the circumferential direction C of the tank 12.
- each bidirectional unit of valves Microfluidics 18 is spaced 36 ° in the circumferential direction C, about the axis X of the reservoir 12, bidirectional units of microfluidic valves 18 adjacent.
- the fourth embodiment of the writing instrument 10 "'of FIG. 5 comprises a plurality of bidirectional units of microfluidic valves 18 regularly distributed in the circumferential direction C and along the axial direction X of the tank 12.
- the bidirectional units of microfluidic valves 18 are distributed in a helical pattern around the X axis of the tank 12.
- each bidirectional unit of microfluidic valves 18 is spaced 36 ° in the circumferential direction C, around the X axis of the reservoir 12, and 1cm along the axial direction X, bidirectional units of microfluidic valves 18 adjacent.
- FIG. 6 represents a fifth embodiment of a writing instrument 10 "" where, with respect to the writing instrument 10 of FIG. 1, the pressure regulating device 16 of the reservoir 12 comprises a baffle 26 and a microfluidic valve 18 'unidirectional.
- the microfluidic valve 18 ' is a so-called "overpressure" valve. This prevents ink leakage in case of overpressure inside the tank relative to the outside of the tank, even if the cap 20 is closed.
- the regulating device 16 comprises in addition or instead of the baffle 26, a porous or fibrous element (not represented).
- the unidirectional microfluidic valve 18 'could allow to avoid excessive depression inside the tank 12 and includes only entities of type 18B of Figure 2A.
- the microfluidic valve 18 ' would then be called "depression".
- such a configuration only makes it possible to avoid excessive depression within the reservoir 12, which only penalizes the supply of ink to the writing tip, which is not a problem since the cap is closed (and therefore that the user does not use the writing instrument), but no ink leakage in case of overpressure inside the tank relative to the outside of the tank when the cap 20 is closed.
- the device 16 for regulating the pressure of the reservoir 12 of the first, second, third and fourth embodiments of FIGS. 1, 3, 4 and 5 comprises only at least one microfluidic valve while the device of FIG. Control 16 of the tank pressure 12 of the fifth embodiment of Figure 6 comprises a combination of at least one microfluidic valve and another distinct device, namely a baffle, a fibrous element and / or a porous element.
- FIG. 7 represents a sixth embodiment of the writing instrument 10 ""'where, with respect to the writing instrument 10 of FIG. 1, the pressure regulating device 16 of the reservoir 12 comprises a baffle 26 but no microfluidic valve.
- the cap 20 is equipped with a microfluidic valve, in this example a bidirectional unit of microfluidic valves 18 for regulating the pressure between the inside and the outside of the cap 20 when the cap protects the writing tip 14 (position shown in FIG. Figure 7).
- the baffle 26 can regulate the pressure within the reservoir 12 itself when the cap 20 protects the writing tip 14.
- the regulating device 16 of the reservoir 12 comprises in addition or instead of the baffle 26, a porous or fibrous element (not shown).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pens And Brushes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1755418A FR3067652B1 (fr) | 2017-06-15 | 2017-06-15 | Instrument d'ecriture a encre libre comprenant une valve microfluidique |
PCT/FR2018/051410 WO2018229443A1 (fr) | 2017-06-15 | 2018-06-14 | Instrument d'écriture à encre libre comprenant une valve microfluidique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3638513A1 true EP3638513A1 (fr) | 2020-04-22 |
EP3638513B1 EP3638513B1 (fr) | 2022-04-06 |
Family
ID=59381561
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18749433.1A Active EP3638513B1 (fr) | 2017-06-15 | 2018-06-14 | Instrument d'écriture à encre libre comprenant une valve microfluidique |
Country Status (4)
Country | Link |
---|---|
US (1) | US11117415B2 (fr) |
EP (1) | EP3638513B1 (fr) |
FR (1) | FR3067652B1 (fr) |
WO (1) | WO2018229443A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115742605A (zh) | 2022-10-27 | 2023-03-07 | 西北工业大学宁波研究院 | 一种太空出舱笔笔芯 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2314551A (en) * | 1941-06-16 | 1943-03-23 | Sheaffer W A Pen Co | Fountain pen |
DE3910787C1 (fr) * | 1989-04-04 | 1990-09-27 | Rotring-Werke Riepe Kg, 2000 Hamburg, De | |
DE4328312A1 (de) * | 1993-08-23 | 1995-03-02 | Draegerwerk Ag | Füllfederhalter mit variablem Füllreservoir zum Druckausgleich zwischen Reservoir und Umgebung |
US5496009A (en) * | 1994-10-07 | 1996-03-05 | Bayer Corporation | Valve |
US6113296A (en) * | 1996-07-03 | 2000-09-05 | Weiss; Oliver | Valve arrangement for controlling a flow of fluid between two fluid chambers and writing implement provided therewith |
EP1144890A2 (fr) * | 1998-11-16 | 2001-10-17 | California Institute of Technology | Micro-clapet anti-retour en parylene et son procede de fabrication |
WO2000063028A1 (fr) * | 1999-04-17 | 2000-10-26 | A.W. Faber-Castell Unternehmensverwaltung Gmbh & Co. | Applicateur |
DE10212279A1 (de) * | 2002-03-20 | 2003-10-02 | Roscher Dietrich | Tintenschreibgerät |
DE10212278B4 (de) * | 2002-03-20 | 2007-10-25 | Dietrich Dr.-Ing. Roscher | Tintenschreibgerät |
US20040120836A1 (en) * | 2002-12-18 | 2004-06-24 | Xunhu Dai | Passive membrane microvalves |
DE102006013920A1 (de) * | 2006-03-25 | 2007-09-27 | Diplomat Cunewalde Gmbh | Tintenschreibgerät und Verfahren zur Steuerung des Tintenflusses an der Schreibfederspitze |
DE102007035721B4 (de) * | 2007-07-30 | 2019-02-07 | Robert Bosch Gmbh | Mikroventil, Verfahren zum Herstellen eines Mikroventils sowie Mikropumpe |
WO2009076597A1 (fr) * | 2007-12-12 | 2009-06-18 | University Of Southern California | Instruments d'écriture et de peinture multicolores |
US9267618B2 (en) * | 2010-05-18 | 2016-02-23 | Samsung Electronics Co., Ltd. | Microvalve device and method of manufacturing the same |
US20130032235A1 (en) * | 2011-08-02 | 2013-02-07 | Teledyne Dalsa Semiconductor, Inc. | Integrated microfluidic check valve and device including such a check valve |
-
2017
- 2017-06-15 FR FR1755418A patent/FR3067652B1/fr not_active Expired - Fee Related
-
2018
- 2018-06-14 US US16/622,682 patent/US11117415B2/en active Active
- 2018-06-14 WO PCT/FR2018/051410 patent/WO2018229443A1/fr unknown
- 2018-06-14 EP EP18749433.1A patent/EP3638513B1/fr active Active
Also Published As
Publication number | Publication date |
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EP3638513B1 (fr) | 2022-04-06 |
FR3067652A1 (fr) | 2018-12-21 |
US20200207144A1 (en) | 2020-07-02 |
WO2018229443A1 (fr) | 2018-12-20 |
US11117415B2 (en) | 2021-09-14 |
FR3067652B1 (fr) | 2020-09-25 |
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