Patent Application
20230347652
This application claims priority from Japanese Patent Application No. 2022-074713 filed on Apr. 28, 2022. The entire content of the priority application is incorporated herein by reference.
There has been known a printer including a recording head configured to eject, through nozzles, ink supplied from an ink cartridge. In such a printer, a new ink cartridge is newly attached to the printer when ink stored in an ink cartridge is consumed in the printer.
Various kinds of ink cartridges storing ink of different initial storage amounts are available in consideration of intended uses and prices. Producing such various kinds of ink cartridges having storage chambers of different internal volumes corresponding to the different initial storage amounts of ink may result in an increase in production cost and intricacy of material management. On the other end, it is also conceivable to produce a single kind of ink cartridge whose internal volume is constant and to differentiate amounts of ink to be stored in each storage chamber according to the respective initial storage amounts. However, in such ink cartridges of a single type, volumes of air layers in respective storage chambers may inevitably become different from one another. For example, as the volume of the air layer becomes larger in the storage chamber, ink bubbles are more likely to be generated in the storage chamber due to vibrations during transportation of the ink cartridge, which may degrade discharging performance of the ink from the ink cartridge. As a result, conceivably, the ink tends to remain in the storage chamber. Further, more air may be dissolved in the ink, which may lead to generation of bubbles in the head and ink channels of the printer.
On the other hand, conceivably, additional member may be provided in a storage chamber or a storage chamber may be partitioned by a partition wall in order to change the internal volume of the storage chamber. However, in such arrangements, ink may be deposited on the additional member or edges of the partition wall. Further, removal of ink remaining in the storage chamber becomes difficult to achieve for recycling of the ink cartridge.
In view of the foregoing, it is an object of the present disclosure to provide a container capable of providing a constant volume of an air layer in a storage chamber for various amounts of liquid stored in the storage chamber.
In order to attain the above and other object, the present disclosure provides a container attachable to an image-forming apparatus. The container includes a container body defining a storage chamber configured to store liquid therein. The container body has a liquid supply opening that is open frontward, and a communication opening that is open to the storage chamber. The container body includes: a liquid channel extending in a front-rear direction to connect the communication opening to the liquid supply opening; a front wall; a rear wall opposite the front wall in the front-rear direction; a first side wall connecting the front wall to the rear wall; a second side wall opposite the first side wall in a left-right direction crossing the front-rear direction; an upper wall connecting the front wall to the rear wall in the front-rear direction; and a lower wall opposite the upper wall in an up-down direction crossing the front-rear direction and the left-right direction. The first side wall has a first outer surface and a first inner surface. The second side wall has a second outer surface and a second inner surface. The upper wall also connects the first side wall to the second side wall in the left-right direction. At least one of the first side wall and the second side wall has a recessed portion. The recessed portion has: an outer surface that is recessed from the first outer surface or the second outer surface; and an inner surface protruding from the first inner surface or the second inner surface. At least a part of the recessed portion is positioned above the liquid supply opening in the up-down direction. The inner surface of the recessed portion defines a part of the storage chamber.
Since the capacity of the storage chamber is decreased by provision of the recessed portion, the volume of the air layer in the storage chamber can be maintained constant even if different amounts of liquid are stored in the storage chamber without a significant change in shape of the container body. Further, since at least a part of the recessed portion is positioned above the liquid supply opening, the liquid can reliably flow out of the storage chamber through the liquid supply opening, rather than staying in the part of the storage chamber defined by the inner surface of the recessed portion. Further, blow molding can be employed to produce the container body. Still further, the liquid is less likely to remain in the storage chamber, and the liquid remaining in the storage chamber can be easily removed therefrom for recycling of the container.
Hereinafter, an ink cartridge 30 according to one embodiment of the present disclosure will be described with reference to the accompanying drawings.
In the following description, the ink cartridge 30 is assumed to be inserted in and removed from a cartridge receiving portion 110 of a printer 10 in a horizontal direction (a direction perpendicular to the gravitational direction). Hence, a front-rear direction 8 and a left-right direction 9 with respect to the ink cartridge 30 will be referred to as being horizontal. Still however, the front-rear direction 8 need not be horizontal. Further, an up-down direction 7 will be defined as a vertical direction perpendicular to the front-rear direction 8. Also, the left-right direction 9 will be defined as a direction perpendicular to the up-down direction 7 and the front-rear direction 8.
Incidentally, a state where the ink cartridge 30 is accommodated in the cartridge receiving portion 110 and is actually used implies a state that the ink cartridge 30 has been inserted in the cartridge receiving portion 110 to be placed at an attached position therein. In the attached position of the ink cartridge 30, an ink needle 102 provided in the cartridge receiving portion 110 is inserted in an ink supply opening 47 of the ink cartridge 30 such that the ink needle 102 and the ink supply opening 47 are connected to each other. Further, in the following description, a posture of the ink cartridge 30 accommodated in the cartridge receiving portion 110 to be used thereby will be referred to as “operational posture” of the ink cartridge 30.
Further, in the following description, a frontward direction implies the direction of insertion of the ink cartridge 30 into the cartridge receiving portion 110, and a rearward direction implies the direction of removal of the ink cartridge 30 from the cartridge receiving portion 110 with respect to the front-rear direction 8. Further, throughout the description, “facing frontward” implies facing in a direction including a component of the frontward direction, and “facing rearward” implies facing in a direction including a component of the rearward direction. Further, “facing downward” implies facing in a direction including a component of the downward direction, and “facing upward” implies facing in a direction including a component of the upward direction. For example, “front surface faces frontward” implies not only that the front surface faces frontward, but also that the front surface faces in a direction slanting relative to the frontward direction.
<Outline of Printer 10>
As illustrated in
The cartridge receiving portion 110 is configured to receive the ink cartridge 30 according to the embodiment. The cartridge receiving portion 110 has one end face formed with an opening 112. The ink cartridge 30 can be inserted frontward into the cartridge receiving portion 110 through the opening 112, and the ink cartridge 30 can be pulled out rearward from the cartridge receiving portion 110 through the opening 112.
Incidentally,
The ink cartridge 30 stores liquid therein, specifically, ink to be used in the printer 10. In the attached state of the ink cartridge 30 to the cartridge receiving portion 110, the ink cartridge 30 and the recording head 21 are connected to each other through the ink tube 20. The recording head 21 is configured to eject the ink supplied from the ink cartridge 30 through a plurality of nozzles 29. Specifically, a head control board (not illustrated) provided in the recoding head 21 is configured to selectively apply a driving voltage to a plurality of piezoelectric elements 29A each corresponding to each nozzle 29 to eject the ink through the selected nozzles 29. That is, the recording head 21 is configured to consume the ink stored in the ink cartridge 30 attached to the cartridge receiving portion 110.
The printer 10 also includes a sheet supply tray 15, a pick-up roller 23, a sheet conveying passage 24, a pair of conveying rollers 25, a platen 26, a pair of discharge rollers 27, and a sheet discharge tray 16. The pick-up roller 23 is configured to feed one sheet on the sheet supply tray 15 onto the sheet conveying passage 24. The sheet conveyed to the sheet conveying passage 24 then reaches the pair of conveying rollers 25. The pair of conveying rollers 25 is then configured to convey the sheet to the platen 26. The recording head 21 selectively ejects the ink onto the sheet while the sheet moves along the platen 26, to form an image on the sheet. The sheet having moved past the platen 26 is then conveyed to the pair of discharge rollers 27. The pair of discharge rollers 27 is configured to discharge the sheet onto the discharge tray 16 which is positioned most downstream in the conveying passage 24.
Cartridge Receiving Portion 110
As illustrated in
As illustrated in
The ink needle 102 is tubular in shape and is positioned at a lower end portion of an end wall 103 of the casing 101, the end wall 103 facing the opening 112 in the front-rear direction 8. The ink needle 102 is provided at the end wall 103 at a position in alignment with the ink supply opening 47 (see
<Ink Cartridge 30>
The ink cartridge 30 is a container configured to store ink as liquid. As illustrated in
As illustrated in
The container body 31 includes: a front wall 40; a rear wall 41 opposite the front wall 40 in the front-rear direction 8; a left wall 42 connecting the front wall 40 to the rear wall 41; a right wall 43 opposite to the left wall 42 in the left-right direction 9; an upper wall 44 connecting the front wall 40 to the rear wall 41; and a lower wall 45 opposite to the upper wall 44 in the up-down direction 7. The front wall 40 has an outer surface facing frontward. The rear wall 41 has an outer surface facing rearward. The left wall 42 has an outer surface facing leftward. The right wall 43 has an outer surface facing rightward. The upper wall 44 has an outer surface facing upward. The lower wall 45 has an outer surface facing downward.
The front wall 40, the rear wall 41, the left wall 42, the right wall 43, the upper wall 44 and the lower wall 45 define in combination a storage chamber 46 which is an internal space of the container body 31. The front wall 40, the rear wall 41, the left wall 42, the right wall 43, the upper wall 44, and the lower wall 45 have a translucency to enable a user to visually recognize a level of the ink stored in the storage chamber 46. The container body 31 is, for example, a molded product made from synthetic resin.
The ink supply opening 47 is positioned at a lower end portion of the front wall 40 to allow the ink in the storage chamber 46 to flow out therefrom through the ink supply opening 47. In the present embodiment, the ink supply opening 47 is open to an outside of the container body 31. However, the ink supply opening 47 may be configured to be opened or closed by a value, for example. The ink supply opening 47 is open frontward. The ink supply opening 47 may have a rectangular shape or a circular shape, and need not be limited thereto.
As illustrated in
A sloped surface 38 is positioned frontward of the communication opening 39. The sloped surface 38 defines a part of an upper end of the ink channel 48. The sloped surface 38 faces diagonally downward and rearward. That is, the sloped surface 38 is sloped upward as extending toward the rear (toward the communication opening 39). With this structure, the ink stored in the storage chamber 46 can flow into the ink channel 48 through the communication opening 39 and then to the outside of the ink cartridge 30 through the ink supply opening 47. Further, air bubbles inside the ink channel 48 tend to move upward along the sloped surface 38 to go into the storage chamber 46 through the communication opening 39.
The upper wall 44 is formed with an air communication port 49 to provide communication between an upper end region (air layer) of the storage chamber 46 and an atmosphere. The storage chamber 46 can communicate with the atmosphere through the air communication port 49. Accordingly, due to the air flow through the air communication port 49, the air layer in the storage chamber 46 can become the atmospheric pressure. Incidentally, the air communication port 49 may be closed by a valve or a semipermeable membrane.
As illustrated in
In the left wall 42 and the right wall 43, respective lower ends of the recessed portion 50L and the recessed portion 50R are at the same position (height) as the lower end of the storage chamber 46 in the up-down direction 7. With respect to the front-rear direction 8, the communication opening 39 is positioned between front and rear ends of each of the recessed portion 50L and the recessed portion 50R (see
In the left wall 42 and the right wall 43, the recessed portions 50L, 50R are not open to any one of the front wall 40, the rear wall 41, the upper wall 44, and the lower wall 45. Here, “the recessed portions 50L, 50R are not open to any one of the front wall 40, the rear wall 41, the upper wall 44, and the lower wall 45” means that a recessed region provided by the recessed portion 50L on an outer surface 42A of the left wall 42 and a recessed region provided by the recessed portion 50R at an outer surface 43A of the right wall 43 are overlapped with any one of the front wall 40, the rear wall 41, the upper wall 44, and the lower wall 45 when viewed in the front-rear direction 8 or in the up-down direction 7 so that the recessed regions cannot be observed when viewed in the front-rear direction 8 or in the up-down direction 7.
As illustrated in
The recessed portion 50L provides a trapezoidal shape in cross-section. The outer surface 50LA includes a front inclined surface 51, a rear inclined surface 52, an upper inclined surface 53, a lower inclined surface 54, and an end surface 55. The end surface 55 has a rectangular shape as viewed in the left-right direction 9, and extends parallel to the outer surface 42A of the left wall 42. The front inclined surface 51 connects a front edge of the end surface 55 to the outer surface 42A, and a normal line of the front inclined surface 51 extends diagonally rearward and leftward. The rear inclined surface 52 connects a rear edge of the end surface 55 to the outer surface 42A, and a normal line of the rear inclined surface 52 extends diagonally frontward and leftward. The upper inclined surface 53 connects an upper edge of the end surface 55 to the outer surface 42A, and a normal line of the upper inclined surface 53 extends diagonally downward and leftward. The lower inclined surface 54 connects a lower edge of the end surface 55 to the outer surface 42A, and a normal line of the lower inclined surface 54 extends diagonally upward and leftward. Each of the front inclined surface 51, the rear inclined surface 52, the upper inclined surface 53, and the lower inclined surface 54 defines an outer angle A1 of less than 270 degrees with respect to the outer surface 42A.
The inner surface 50LB includes a front inclined surface 56, a rear inclined surface 57, an upper inclined surface 58, a lower inclined surface 59, and an end surface 60. The end surface 60 has a rectangular shape as viewed in the left-right direction 9, and extends parallel to the inner surface 42B of the left wall 42. The front inclined surface 56 connects a front edge of the end surface 60 to the inner surface 42B, and a normal line of the front inclined surface 56 extends diagonally frontward and rightward. The rear inclined surface 57 connects a rear edge of the end surface 60 to the inner surface 42B, and a normal line of the rear inclined surface 57 extends diagonally rearward and rightward. The upper inclined surface 58 connects an upper edge of the end surface 60 to the inner surface 42B, and a normal line of the upper inclined surface 58 extends diagonally upward and rightward. The lower inclined surface 59 connects a lower edge of the end surface 60 to the inner surface 42B, and a normal line of the lower inclined surface 59 extends diagonally downward and rightward. Each of the front inclined surface 56, the rear inclined surface 57, the upper inclined surface 58, and the lower inclined surface 59 defines an inner angle A2 of greater than 90 degrees with respect to the inner surface 42B.
As illustrated in
The recessed portion 50R has a trapezoidal shape in cross-section. The outer surface 50RA includes a front inclined surface 61, a rear inclined surface 62, an upper inclined surface 63, a lower inclined surface 64, and an end surface 65. The end surface 65 has a rectangular shape as viewed in the left-right direction 9, and extends parallel to the outer surface 43A of the right wall 43. The front inclined surface 61 connects a front edge of the end surface 65 to the outer surface 43A, and a normal line of the front inclined surface 61 extends diagonally rearward and rightward. The rear inclined surface 62 connects a rear edge of the end surface 65 to the outer surface 43A, and a normal line of the rear inclined surface 62 extends diagonally frontward and rightward. The upper inclined surface 63 connects an upper edge of the end surface 65 to the outer surface 43A, and a normal line of the upper inclined surface 63 extends diagonally downward and rightward. The lower inclined surface 64 connects a lower edge of the end surface 65 to the outer surface 43A, and a normal line of the lower inclined surface 64 extends diagonally upward and rightward. Each of the front inclined surface 61, the rear inclined surface 62, the upper inclined surface 63, and the lower inclined surface 64 defines an outer angle equal to the outer angle A1 of less than 270 degrees with respect to the outer surface 43A.
The inner surface SORB includes a front inclined surface 66, a rear inclined surface 67, an upper inclined surface 68, a lower inclined surface 69, and an end surface 70. The end surface 70 has a rectangular shape as viewed in the left-right direction 9, and extends parallel to the inner surface 43B of the right wall 43. The front inclined surface 66 connects a front edge of the end surface 70 to the inner surface 43B, and a normal line of the front inclined surface 66 extends diagonally frontward and leftward. The rear inclined surface 67 connects a rear edge of the end surface 70 to the inner surface 43B, and a normal line of the rear inclined surface 67 extends diagonally rearward and leftward. The upper inclined surface 68 connects an upper edge of the end surface 70 to the inner surface 43B, and a normal line of the upper inclined surface 68 extends diagonally upward and leftward. The lower inclined surface 69 connects a lower edge of the end surface 70 to the inner surface 43B, and a normal line of the lower inclined surface 69 extends diagonally downward and leftward. Each of the front inclined surface 66, the rear inclined surface 67, the upper inclined surface 68, and the lower inclined surface 69 defines an inner angle equal to the inner angle A2 of greater than 90 degrees with respect to the inner surface 43B.
The inner surface 50LB of the recessed portion 50L of the left wall 42 faces the inner surface SORB of the recessed portion 50R of the right wall 43 in the left-right direction 9. The inner surface 50LB and the inner surface SORB respectively define a part of the storage chamber 46. That is, ink can be stored between the inner surface 50LB and the inner surface SORB.
The communication opening 39 is open to the storage chamber 46, particularly to a space defined between the inner surface 50LB and the inner surface SORB in the left-right direction 9 (se
The cover 32 has a rectangular parallelepiped shape whose size is smaller than the size of the container body 31. The cover 23 has a box-like configuration which is open rearward. The cover 32 is attached to the container body 31 such that the cover 32 covers an upper portion of the front wall 40 of the container body 31, the upper portion being above the ink supply opening 47. The cover 32 has a front end 32A positioned frontward of the ink supply opening 47 in the front-rear direction 8.
The storage chamber 46 of the container body 31 is configured to store ink therein. As illustrated in
As the ink stored in the storage chamber 46 of the ink cartridge 30 is consumed by the recording head 21, the level of ink (liquid surface of the ink) in the storage chamber 46 is gradually lowered to a position lower than the upper inclined surface 58 of the recessed portion 50L and the upper inclined surface 68 of the recessed portion 50R. At this time, the ink flows downward along the upper inclined surfaces 58 and 68.
Further, as illustrated in
Further, as illustrated in
According to the ink cartridge 30 of the embodiment, the capacity of the storage chamber 46 becomes smaller due to the provision of the recessed portions 50L and 50R, compared to the comparative ink cartridge 90 without the recessed portions 50L, 50R. With this configuration, the air layer in the storage chamber 46 can have a constant volume without significant modifications to the outer shape of the container body 31. Further, even if a variety of amounts of ink is to be stored in a plurality of the ink cartridges 30, the volume of the air layer in the storage chamber 46 of each ink cartridge 30 can be made constant by simply changing the size and/or the number of the recessed portions 50L, 50R provided at each container body 31.
Further, since at least a part of the recessed portions 50L and 50R is positioned higher than the ink supply opening 47, the ink stored in the space between the end surface 60 of the recessed portion 50L and the end surface 70 of the recessed portion 50R can reliably flow out of the ink supply opening 47 with little deposition of the ink on the end surfaces 60, 70.
Further, in a case where blow molding is employed for molding the container body 31, blow pressure is applied to the internal space between the recessed portions 50L and 50R inside the container body 31, which facilitates forming the container body 31 with a constant thickness. Further, since the ink is stored between the recessed portions 50L and 50R, the ink is less likely to remain in the storage chamber 46, and residual ink that may remain in the storage chamber 46, if any, can be easily removed by washing away with water during a recycling process of the ink cartridge 30.
Further, the level of ink stored in the storage chamber 46 can be visually observed from the outside of the container body 31, since the left wall 42 and the right wall 43 of the container body 31 are light transmissive.
Further, since the inner surface 50LB of the recessed portion 50L and the inner surface 50LRB of the recessed portion 50R face each other, the capacity of the storage chamber 46 can be easily adjusted and the container body 31 can be well balanced in terms of its weight.
Further, the ink is less likely to remain on the front inclined surfaces 56, 66, the rear inclined surfaces 57, 67, the upper inclined surfaces 58, 68, and the lower inclined surfaces 59, 69, since these surfaces respectively form the inner angle A2 of greater than 90 degrees relative to the corresponding inner surfaces 42B, 43B of the left and right walls 42, 43 of the container body 31.
In the above-described embodiment, the recessed portion 50L of the left wall 42 and the recessed portion 50R of the right wall 43 are overlapped with the center C between the front wall 40 and the rear wall 41 in the front-rear direction 8. Further, the length L1 of the recessed portion 50L (or the recessed portion 50R) is equal to or greater than one half of the distance L2 of the corresponding left wall 42 (or the right wall 43). With this configuration, each of the recessed portions 50L and 50R can occupy a larger part of the corresponding left wall 42 or the right wall 43, and the capacity of the storage chamber 46 can be easily adjusted even more easily.
Further, the container body 31 has a high rigidity, since the recessed portions 50L, 50R are not open to any one of the front wall 40, the rear wall 41, the upper wall 44, and the lower wall 45.
Further, the sloped surface 38 defining a part of the ink channel 48 can facilitate movement of air bubbles inside in the ink channel 48 into storage chamber 46 through the communication opening 39.
While the invention has been described in conjunction with various example structures outlined above and illustrated in the figures, various alternatives, modifications, variations, improvements, and/or substantial equivalents, whether known or that may be presently unforeseen, may become apparent to those having at least ordinary skill in the art. Accordingly, the example embodiments of the disclosure, as set forth above, are intended to be illustrative of the invention, and not limiting the invention. Various changes may be made without departing from the spirit and scope of the disclosure. Therefore, the disclosure is intended to embrace all known or later developed alternatives, modifications, variations, improvements, and/or substantial equivalents. Some specific examples of potential alternatives, modifications, or variations in the described invention are provided below:
Hereinafter, various modifications to the above-described embodiment will be described with reference to accompanying drawings wherein like parts and components are designated by the same reference numerals as those of the above-described embodiment.
In connection with the second modification where the sub-recessed portions 271 are provided, inner surfaces of the two opposing sub-recessed portions 271 may face each other in the left-right direction 9 with a space defined therebetween as illustrated in
Further, inner surfaces of the recessed portions 450L and 450R constitute a part of an ink channel 448 formed in a lower wall 445 of the container body 431. To this end, the communication opening 439 may have a dimension greater than a dimension of the recessed portions 450L and 450R in the front-rear direction 8. Each of the recessed portions 450L and 450R has a portion positioned above the ink supply opening 47 in the up-down direction 7 (meaning that a remaining portion is positioned in alignment with the ink supply opening 47 in the up-down direction 7). Further, the ink channel 448 may not have the sloped surface 38, irrespective of the position and shape of the recessed portions 450L, 450R.
Further, the recessed portion 650 on the right wall 643 is open to a rear wall 641 of the container body 631 in the sixth embodiment. However, the recessed portion 650 may be open to the front wall 40, or the upper wall 44, or the lower wall 45 of the container body 631. Likewise, in a case where the recessed portion 650 is formed only in the left wall 642, the recessed portion 650 may also be open to any one of the front wall 40, or the rear wall 641, or the upper wall 44, or the lower wall 45 of the container body 631.
Specifically, referring to
As a further modification, the ridge 759A may be inclined relative to the front-rear direction 8 so as to extend diagonally upward toward the front away from the communication opening 39 in the front-rear direction 8. Still alternatively, the ridge 759A may have a V-shape that is open upward in a side view. That is, the ridge 759A may have front and rear sides sloping diagonally upward toward the front and the rear, respectively, as extending away from the communication opening 39 in the front-rear direction 8.
<Other Variations>
According to the above-described embodiment, the recessed portions 50L, 50R have a rectangular outer shape. However, the recessed portions 50L 50R may have a polygonal outer shape other than the rectangular outer shape. Still further, the recessed portions 50L, 50R may have a circular shape, an elliptical shape, and a star-like shape, and the like.
In the above-described embodiment, ink is stored in the container body 31 as an example of liquid (as a recording material). However, the container body 31 may store liquid other than ink, such as pretreatment liquid configured to be ejected onto a sheet prior to printing with ink.
[Remarks]
The ink cartridges 30, 130, 230, 330, 430, 530, 630, 730, 830 are examples of a container. The container bodies 31, 131, 231, 331, 431, 531, 631, 731, 831 are examples of a container body. The storage chamber 46 is an example of a storage chamber. The ink supply opening 47 is an example of a liquid supply opening. The ink channels 48, 448 are examples of a liquid channel. The front wall 40 is an example of a front wall. The rear wall 41 is an example of a rear wall. The left walls 42, 142, 242, 342, 442, 542, 642, 742, 842 are examples of a first side wall. The right walls 43, 143, 243, 343, 443, 543, 643, 743, 843 are examples of a second side wall. The upper wall 44 is an example of an upper wall. The lower walls 45, 445 are examples of a lower wall. The recessed portions 50L, 50R, 150L, 150R, 250L, 250R, 350L, 350R, 450L, 450R, 650, 750L, 750R, 850L, 850R are examples of a recessed portion. The outer surfaces 50LA, 50RA, 250LA, 250RA are examples of an outer surface of the recessed portion. The inner surfaces 50LB, SORB are examples of an inner surface of the recessed portion. The inclined surfaces 56, 57, 58, 59, 66, 67, 68, 69, 759 are examples of a crossing surface. The communication openings 39, 439 are examples of a communication opening. The upper inclined surface 158 is an example of an upper inclined surface. The sub-recessed portion 571 is an example of a sub-recessed portion. The ridge 759A is an example of a ridge. The sloped surface 38 is an example of a sloped surface of the liquid channel. The width W2 is an example of a dimension of the communication opening in the left-right direction. The width W3 is an example of a dimension of the liquid supply opening in the left-right direction.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2022-074713 | Apr 2022 | JP | national |
