JP6104305B2 - Printing device - Google Patents

Description

  The present invention relates to an inkjet printing apparatus.

  Patent Document 1 discloses an ink jet printing apparatus that can perform borderless printing. In the platen that supports the sheet, a plurality of ink guide grooves are formed by a large number of ribs provided along the sheet conveyance direction. An ink absorber is provided downstream of the ink guide groove. The ink ejected and landed toward the platen during the borderless printing is guided by the slightly inclined ink guide groove and absorbed by the ink absorber.

JP 2006-35685 A

  When the printing apparatus of Patent Document 1 is installed on an inclined installation surface that is not horizontal, a large problem is caused depending on the angle and direction of the inclination. When the inclination of the installation surface cancels the inclination of the platen and the platen becomes horizontal, the ink that has landed on the platen accumulates without flowing in the ink guide groove. When the sheet passes over the accumulated ink, the ink adheres to the back surface of the sheet and causes sheet contamination. When the inclination of the installation surface is further large, the ink in the ink guide groove flows in the opposite direction (upstream side) due to gravity, not toward the absorber (downstream side). If the amount of ink is large, the ink drips from the platen and the inside of the apparatus is contaminated. Thus, since the ink dripping inside the apparatus is difficult to clean, the liquid component of the ink causes problems such as corrosion of components and short circuit of electrical parts.

  SUMMARY OF THE INVENTION An object of the present invention is to solve such problems and to provide an ink jet printing apparatus provided with a platen improved from the conventional one.

One aspect of the present invention that solves the above-described problems is a printing apparatus that includes an inkjet print head and a platen that supports a sheet to be printed, and the platen is ejected from the print head. An ink receiver for receiving ink is provided, and a plurality of grooves for guiding the received ink are formed in the ink receiver, and the plurality of grooves have a plurality of first inclination angles with respect to the installation surface of the apparatus. A first ink groove, a plurality of second ink grooves having an inclination angle larger than the first inclination angle, and a third ink groove connecting the first ink groove and the second ink groove. wherein the door, which ink to the said the first ink channels through said third ink channels second ink channels moves, ink absorber for absorbing ink that is induced in the plurality of grooves The first ink groove and the second ink groove are formed along the direction in which the sheet is conveyed and are directed toward the ink absorber provided on the downstream side. Inclined to guide the ink .

  According to the present invention, even if the installation surface of the printing apparatus is inclined, the ink discharged onto the platen is guided as desired. That is, even if the ink cannot be guided in the first ink groove, the ink is guided in a desired direction by the second ink groove having a larger inclination angle. Therefore, the ink does not accumulate or sag on the platen as in the prior art, and problems such as sheet back contamination and ink contamination inside the apparatus are solved.

A perspective view showing an appearance of a printing apparatus according to an embodiment Sectional view showing the internal configuration of the printing device The perspective view which shows the structure of the platen concerning Example 1. FIG. Cross-sectional view showing detailed structure of ink receiver (cross-sectional view at the most downstream side) Cross-sectional view showing detailed structure of ink receiver (cross-sectional view at lateral groove) The figure which shows the several ink path | route until it reaches an ink absorber on an ink receiver The perspective view which shows the structure of the platen concerning Example 2. FIG. Sectional drawing for demonstrating the change of the inclination state of a platen

  FIG. 1 is a perspective view illustrating an external appearance of a printing apparatus according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating an internal configuration of the printing apparatus. The printing apparatus is roughly divided into a printing unit 100 and a scanner unit 101 thereabove, and an operation panel 10 having a display and input keys is provided on the front side of the apparatus. As shown in FIG. 2, the printing apparatus is installed on an installation surface FL such as a floor or a desk when used. The installation surface FL is usually a horizontal plane perpendicular to the direction of gravity.

  The print unit 100 includes a cassette 1, a pickup roller 2, and a print unit 4 (including a carriage 41 and a print head 42). The print unit 100 further includes a sheet conveyance unit including a feed roller 3, a main conveyance roller 6, and a discharge roller 7, and a tray 9 that supports printed sheets discharged from the discharge port 8. A platen 5 that supports the printed sheet from below is provided facing the printing unit 4. The present invention is characterized by the structure of the platen 5 and will be described in detail later.

  Note that the printing apparatus is not limited to a composite apparatus having both a print function and a scanner function as in this example, and may be an apparatus that combines other functions such as a facsimile, or may be a single-function printer. The printing method is not limited to a serial printer, and may be a line printer in which long line heads are fixed and arranged.

  The sheets S as recording media stacked and accommodated in the cassette 1 are taken out one by one by the pickup roller 2 and conveyed on the platen 5 by the sheet conveying unit. After the image is printed by the printing unit 4, the sheet S is discharged from the discharge port 8 onto the tray 9. The print head 42 is an ink jet system using a heating element, a piezo element, and the like, and includes a nozzle row corresponding to a plurality of colors of ink, and prints a color image.

  The sheet S is conveyed on the platen 5 from the right to the left in FIG. While the carriage 41 reciprocates in the sheet width direction (perpendicular to the paper surface in FIG. 2), printing is performed one band at a time and step feeding of the sheet S is performed, and printing is performed in a serial manner. In this specification, when viewed from the platen, the upstream in the sheet conveyance direction may be simply referred to as “upstream”, and the downstream in the sheet conveyance direction may be simply referred to as “downstream”.

  This printing apparatus can perform borderless printing without providing a margin at the end of the sheet S. When an image is printed without a margin on the leading edge of the sheet S being conveyed, a part of the ink droplets ejected from the nozzle row of the print head 42 is applied to the leading edge of the sheet S, and the ink droplets of the remaining nozzles are outside the sheet. It protrudes (downstream) and reaches the surface of the platen 5. On the surface of the platen 5 for receiving ink, an ink receiver 50 described later is provided. As printing proceeds, an image is printed at the trailing edge of the last sheet S without a margin. At that time, some of the ink droplets ejected from the nozzle row of the print head 42 are applied to the rear end of the sheet S, and the ink droplets of the remaining nozzles protrude to the outside (upstream side) of the sheet and are received by the ink receiver 50. . In addition, when an image is printed without a margin at the sheet edge not only in the front and rear edges of the sheet S but also in the sheet width direction of the sheet (in the direction perpendicular to the paper surface in the drawing), the ink that protrudes outside the sheet is similarly received by the ink receiver 50. Receive at.

  Further, as an application different from the borderless printing, the ink receiver 50 is also used during a preliminary ejection operation for suppressing clogging of the print head and an increase in ink viscosity. The preliminary ejection operation is performed by ejecting a small number of ink droplets from each nozzle of the print head 42 toward the ink receiver 50 before or during the printing operation.

<Example 1>
Details of the platen 5 according to the first embodiment will be described below. FIG. 3 is a perspective view illustrating the structure of the platen according to the first embodiment when viewed obliquely from above. FIG. 4 is a cross-sectional view showing a detailed structure of the ink receiver 50, and is a cross-sectional view at the most downstream side as viewed from the downstream side in the sheet conveying direction (an ink absorber described later).

  On the surface of the platen 5, a plurality of ribs 51a (upstream side) and ribs 51b (downstream side) for supporting the conveyed sheet S from below are provided. An ink receiver 50 that receives ink droplets ejected from the print head is formed between the ribs in the sheet conveying direction. The ink receiver 50 includes an ink absorber 54 and an ink guide portion 52 (vertical groove group) that guides excess ink that has landed on the ink receiver 50 toward the downstream side toward the ink absorber 54. The ink absorber 54 has a rectangular parallelepiped shape made of a fibrous or porous material that absorbs excess ink, and is in contact with the ink receiving portion 50 and is embedded and held in the platen on the downstream side. The ink absorber 54 may be a sealed bag that absorbs and stores ink inside.

  The ink guiding section 52 has a large number of small inclined grooves 522 (first ink grooves) and a small number of large inclined grooves 521 (second ink) for guiding ink to the downstream side where the ink absorber 54 is provided. Groove). In other words, a large number of ribs having the same height are provided at equal intervals, and an inclined groove having a groove bottom inclined between adjacent ribs is formed. The heads of the many ribs have a uniform height, but are lower than the heads of the ribs 51a and 51b that support the sheet with the platen, and the back surface of the conveyed sheet S is the heads of the many ribs in the ink receiver 50. The part is not touched. This prevents the back of the sheet from being soiled.

  The large inclined groove 521 has a larger inclination angle with respect to the sheet conveying direction and a larger number of grooves than the small inclined groove 522. In this example, two adjacent large inclined grooves 521 are provided for every six small inclined grooves 522 in the sheet width direction. On the surface of the platen, one upstream rib 51a, one rib between adjacent large inclined grooves 521, and one downstream rib 51b are aligned. Thus, the number of inclined grooves constituting the ink guiding portion 52 is larger than the number of ribs 51 a and 51 b for supporting the sheet S.

  Since both the large inclined groove 521 and the small inclined groove 522 are formed so as to be inclined with respect to the horizontal, excess ink that has landed on the ink receiver 50 is moved downstream in the position where the ink absorber 54 is located by the action of gravity. It is guided smoothly. The large inclined groove 521 has an inclination angle of 10 degrees with respect to the horizontal, and the small inclined groove 522 has an inclination angle of 3 degrees with respect to the horizontal. Note that the plurality of small inclined grooves 522 may have a plurality of grooves having different inclination angles smaller than 10 degrees. Further, the large inclined groove 521 and the small inclined groove 522 may have a shape in which the inclination angle changes in the middle of one groove.

  The ink receiver 50 is further formed with an ink guiding portion 53 (horizontal groove group) for guiding ink in a direction (sheet width direction) substantially orthogonal to the ink guiding portion 52. In the ink guiding portion 53, lateral grooves 531 and lateral grooves 532 (third ink grooves) each having an inclination angle with respect to the horizontal are alternately linearly provided as a whole. The lateral grooves 531 and 532 are provided so as to cross the vicinity of the center of the plurality of small inclined grooves 522 (the center in the sheet conveying direction) along the sheet width direction. Further, a rib 533 for preventing the ink flowing upstream from overflowing the surface of the platen is provided in the uppermost stream of the ink receiver 50 along the sheet width direction. A rib 51 a is provided on the platen surface further upstream of the rib 533, and a rib 51 b is provided on the platen surface further downstream of the ink absorber 54.

  FIG. 5 is a cross-sectional view showing the structure of the ink guiding portion 53. This figure is a cross-sectional view of the platen near the center in the sheet conveying direction. A horizontal groove 531 or a horizontal groove 532 is provided corresponding to one large inclined groove 521. Although the horizontal grooves 531 and the horizontal grooves 532 have different inclination directions, both of them have a downward inclination that becomes lower toward the large inclined groove 521 so that ink flows toward the corresponding large inclined groove 521 by the action of gravity. .

  In order to improve the ink flow, the large inclined groove 521 and the small inclined groove 522 preferably have a V-shaped cross section of the guide groove. Further, the groove width may be formed non-uniformly so that the cross-sectional area of the guide groove becomes smaller toward the ink absorber 54. Similarly, the lateral grooves 531 and 532 are preferably V-shaped in cross section, and may be formed so that the cross-sectional area of the guide groove becomes smaller toward the large inclined groove 521. In order to further improve the ink flow, it is preferable that the small inclined groove 522, the large inclined groove 521, and the lateral grooves 531 and 532 are provided with a water-repellent fluorine coating on the surface or the surface is glossy finished.

  FIG. 6 is a diagram showing a plurality of ink paths until the ink absorber is reached on the ink receiver 50. The ink that has landed on the ink receiver 50 is guided to the ink absorber 54 through three routes. The first (dotted line shown as route 1) is a route that flows from the large inclined groove 521 to the ink absorber 54. The second (dotted line shown as route 2) moves from the small inclined groove 522 to the large inclined groove 521 via the horizontal groove 531 or the horizontal groove 532 (the horizontal groove 532 in FIG. 6), and flows from the large inclined groove 521 to the ink absorber 54. It is a route. The third (dotted line shown as route 3) is a route that flows from the small inclined groove 522 located downstream of the ink guiding portion 53 to the ink absorber 54.

  In FIG. 6, for ease of understanding, only one representative route is drawn for each of the three types of routes with a dotted line, and other equivalent routes are not shown. For example, in the route 2, a plurality of (three in this example) small inclined grooves 522 are assigned to a plurality of large inclined grooves 521. Similarly, ink flows into the ink absorber 54.

  Many of the ink droplets ejected from the print head to the outside of the sheet at the time of borderless printing or preliminary ejection land on the small inclined groove 522 having a large area ratio in the ink receiver 50. Accordingly, a lot of ink is guided to the ink absorber 54 via the route 2 and the route 3. A portion of the ink droplets from the print head land on the large inclined groove 521 and are guided to the ink absorber 54 through the large inclined groove 521 as it is. Usually, since the installation surface FL on which the printing apparatus is installed is horizontal, the ink flows as intended.

  If the printing apparatus is installed with a slight inclination, the ink flow in the small inclined groove 522 may stagnate. Also in this case, the ink moves to the large inclined groove 521 by the lateral grooves 531 and 532 and is reliably guided to the ink absorber 54 by the large inclined groove 521. Therefore, ink does not remain in the ink receiver 50 and the sheet is not soiled.

  As described above, the large inclined groove 521 has an inclination angle of 10 degrees with respect to the horizontal, and the small inclined groove 522 has an inclination angle of 3 degrees with respect to the horizontal. If the installation surface is inclined so that the downstream side of the printing apparatus becomes higher and has an inclination of 3 degrees or more, the small inclined groove 522 has an inclination in which the upstream side is lowered. Therefore, the ink that has landed on the small inclined groove 522 flows backward toward the upstream. In the small inclined groove 522, the ink that has landed on the downstream side of the horizontal groove flows to the large inclined groove 521 via the horizontal groove 531 or the horizontal groove 532 when flowing slightly upstream. Since the large inclined groove 521 is low on the downstream side unless the installation surface has an inclination of 10 degrees or more, the ink flows toward the downstream and is absorbed by the ink absorber 54. On the other hand, in the small inclined groove 522, the ink that has landed on the upstream side of the lateral groove flows upstream, but is blocked by the ribs 533 that are the walls for blocking, and the ink overflows further on the upstream platen surface. There is no. In reality, it is difficult to assume that the user places the printing apparatus on an installation surface that is greatly inclined by 10 degrees or more. These set angles are merely examples, and the respective angles are not limited as long as the condition that the large inclined groove 521 has a larger inclination angle than the small inclined groove 522 is satisfied.

  Here, if the inclination angle of not only the large inclined groove 521 but also the small inclined groove 522 is increased (for example, 10 degrees), the ink does not flow backward, but another problem that the ink mist increases is caused. In other words, the gap between the nozzles of the print head 42 and the bottom of the ink groove is increased in all regions, and the flight distance until the ejected ink droplets land is increased, which causes an increase in the amount of ink mist generated. . Since the generated ink mist floats inside the apparatus and adheres to the components and sheets of the apparatus and becomes dirty, it is required to suppress the generation of mist as much as possible. Therefore, in this embodiment, the function is separated into the small inclined grooves 522 and the large inclined grooves 521, and the majority of the small inclined grooves 522 are used to reduce the number of large inclined grooves 521 where ink mist is likely to occur. As a result, most of the ink droplets are received by the small inclined groove 522, and since the ink flying distance is short, the generation of ink mist is small.

  In order to improve the ink flow, the large inclined groove 521 and the small inclined groove 522 preferably have a V-shaped cross section of the guide groove. Further, the groove width may be formed non-uniformly so that the cross-sectional area of the guide groove becomes smaller toward the ink absorber 54. Similarly, the lateral grooves 531 and 532 are preferably V-shaped in cross section, and may be formed so that the cross-sectional area of the guide groove becomes smaller toward the large inclined groove 521. In order to further improve the ink flow, it is preferable that the small inclined groove 522, the large inclined groove 521, and the lateral grooves 531 and 532 are subjected to a water-repellent treatment (fluorine coating) on the surface, or the surface is glossy finished.

<Example 2>
Hereinafter, Example 2 regarding the platen 5 will be described. In the second embodiment, a mechanism for changing the inclination angle of the ink receiver 50 is provided, and ink is forcibly discharged from the ink receiver 50 at a predetermined timing, thereby obtaining the same effects as those of the first embodiment.

  FIG. 7 is a perspective view showing the structure of a drive mechanism for changing the inclination angle of the platen. FIG. 8 is a cross-sectional view for explaining a change in the inclined state of the platen. Since the entire printing apparatus is the same as that described with reference to FIGS. 1 and 2, the description thereof is omitted here.

  Unlike the first embodiment, the platen 5 is composed of a small inclined groove 522, and an ink absorber 54 is embedded downstream thereof. The structure in which the rib 533 is provided on the uppermost stream of the ink receiver 50, the rib 51a is provided on the platen surface further upstream, and the rib 51b is provided on the platen surface downstream of the ink absorber 54 is described in the first embodiment. It is the same.

  Further, the platen 5 is rotatably supported so as to rotate about a shaft 51e provided on both sides and on the upstream side so that the downstream side of the platen can be moved up and down. For this drive, a drive mechanism including a motor 55 and a slide plate 56 that slides horizontally as the motor rotates is provided below the platen 5. The slide plate 56 is formed with semi-cylindrical ribs 56a at two locations. Then, V-shaped cam portions 51c are formed at two locations on the back surface 51d on the downstream side of the platen 5 facing this.

  When the slide plate 56 is positioned so that the two ribs 56a come into contact with the two cam portions 51c, the downstream side of the platen 5 is lifted, and the platen 5 assumes the horizontal posture shown in FIG. . The ink receiver 50 formed on the platen 5 is substantially parallel to the print head 42, and the small inclined groove 522 of the ink receiver 50 has an inclination angle θ1 (here, 3 degrees) with respect to the horizontal as in the previous embodiment. It becomes. Here, when the motor 55 is rotated and the slide plate 56 is slid sideways, the two ribs 56a are disengaged from the cam portion 51c, and the platen 5 is rotated accordingly, and the downstream side is lowered. As a result, the platen 5 assumes the inclined posture shown in FIG. In this state, the small inclined groove 522 of the ink receiver 50 has a larger inclination angle θ2 (here, 10 degrees) with respect to the horizontal. That is, the relationship θ1 <θ2. In FIG. 8, the inclination angle is exaggerated from the actual θ1 and θ2 for easy understanding.

  When ink is ejected to the standard state or at least to the sheet, the platen 5 is set to the horizontal posture shown in FIG. Since the distance between the print head and the ink receiver 50 of the platen is the shortest, the occurrence of ink mist is also minimized. Ink drops ejected toward the ink receiver 50 by borderless printing or preliminary ejection during the printing operation are received by the ink receiver 50. During the printing operation, the small inclined groove 522 of the ink receiver 50 has an inclination angle θ1 (here, 3 degrees) with respect to the horizontal, and the ink flows in the downstream direction.

  However, as described above, if the installation surface FL of the printing apparatus is inclined, the flow of ink in the small inclined groove 522 is deteriorated, and in some cases, the ink does not flow back and be discharged. Therefore, in order to forcibly discharge the accumulated ink, the platen 5 is temporarily in the inclined posture of FIG. 8B at a predetermined timing. In this inclined posture, the inclined posture of the small inclined groove 522 is θ2 larger than θ1, and even if the installation surface FL is not horizontal, the ink is surely guided to the downstream ink absorber 54, and the ink is received by the ink. 50 is forcibly discharged.

  The purpose of this ink discharging operation is to discharge the ink accumulated in the ink receiver 50, so that the ink discharging operation is performed at a predetermined timing after the operation of discharging ink such as a printing operation or a preliminary discharging operation is completed. For example, the ink discharging operation may be performed once after the printing of the image of one job or a plurality of jobs is completed, and once after the preliminary ejection operation for the ink receiver 50 is performed. Note that the inclined posture may be maintained throughout the period other than the period of the printing operation and the preliminary ejection operation. Further, an inclination sensor may be provided in the printing apparatus, and control may be performed so that the discharging operation is performed only when it is detected that the apparatus has an inclination. These are also examples of predetermined timing for performing the ink discharging operation.

  The direction in which the platen 5 is tilted is not limited to the form of the second embodiment, and the platen 5 may be tilted by the drive mechanism with respect to the sheet width direction orthogonal thereto. Further, in the second embodiment, the posture of the entire platen 5 is changed by the drive mechanism, but a mechanism may be adopted in which the outer frame of the platen 5 is fixed and the posture of only the inner ink receiver 50 is changed.

  In the second embodiment, the ink receiver 50 is composed of only the small inclined grooves 522. However, as in the first embodiment, the ink receiver 50 may have a plurality of ink grooves having different inclination angles. That is, the form which combined Example 1 and Example 2 may be sufficient. In the first embodiment, if the installation surface FL has a large inclination exceeding 10 degrees, the ink may not be completely discharged. However, the ink can be discharged by combining the mechanism of the second embodiment.

4 Print section 5 Platen 50 Ink receiver 52 Ink guide section (vertical groove group)
53 Ink guiding part (horizontal groove group)
54 Ink absorber 521 Large inclined groove (second ink groove)
522 Small inclined groove (first ink groove)
531 and 532 Horizontal groove (third ink groove)
Installation surface of FL printing device S sheet

Claims (16)

An inkjet printhead;
A platen that supports the sheet to be printed;
A printing device comprising:
The platen includes an ink receiver that receives ink ejected from the print head,
The ink receiver is formed with a plurality of grooves for guiding the received ink.
The plurality of grooves include a plurality of first ink grooves having a first inclination angle with respect to an installation surface of the apparatus, and a plurality of second ink grooves having an inclination angle larger than the first inclination angle. And the third ink groove connecting the first ink groove and the second ink groove, and the ink moves from the first ink groove to the second ink groove through the third ink groove. Is what
An ink absorber that absorbs ink guided by the plurality of grooves is provided on the platen;
The first ink groove and the second ink groove are formed along a direction in which the sheet is conveyed, and are inclined so as to guide the ink toward the ink absorber provided on the downstream side. The printing apparatus characterized by the above-mentioned. 2. The printing apparatus according to claim 1 , wherein the third ink groove is inclined so that the ink moves from the first ink groove to the second ink groove by gravity. 3. It said third ink groove, and being provided so as to cross the central area of plurality of the first ink channels, printing apparatus as claimed in claim 1 or 2. In the ink receiving, wherein the most upstream of the first ink channels and said second ink channels, characterized in that the ribs for damming the ink is provided, any one of claims 1 to 3 of 1 The printing apparatus according to item. An inkjet printhead;
A platen that supports the sheet to be printed;
A printing device comprising:
The platen includes an ink receiver that receives ink ejected from the print head,
The ink receiver is formed with a plurality of grooves for guiding the received ink.
The plurality of grooves include a plurality of first ink grooves having a first inclination angle with respect to an installation surface of the apparatus, and a plurality of second ink grooves having an inclination angle larger than the first inclination angle. And the third ink groove connecting the first ink groove and the second ink groove, and the ink moves from the first ink groove to the second ink groove through the third ink groove. Is what
The printing apparatus, wherein the third ink groove is provided so as to cross a vicinity of a center of the plurality of first ink grooves. An inkjet printhead;
A platen that supports the sheet to be printed;
A printing device comprising:
The platen includes an ink receiver that receives ink ejected from the print head,
The ink receiver is formed with a plurality of grooves for guiding the received ink.
The plurality of grooves include a plurality of first ink grooves having a first inclination angle with respect to an installation surface of the apparatus, and a plurality of second ink grooves having an inclination angle larger than the first inclination angle. And the third ink groove connecting the first ink groove and the second ink groove, and the ink moves from the first ink groove to the second ink groove through the third ink groove. Is what
In the ink receiver, a rib for blocking ink is provided in the uppermost stream of the first ink groove and the second ink groove.   7. The platen according to claim 1, wherein ribs for supporting a sheet are provided upstream and downstream of the ink receiver, and the sheet supported on the platen does not contact the ink receiver. The printing apparatus according to any one of the above.   8. The printing apparatus according to claim 1, wherein the first ink groove and the second ink groove have a V-shaped cross section. 9.   The printing apparatus according to claim 1, wherein the printing apparatus includes a mechanism that changes an inclination angle of the ink receiver. An inkjet printhead;
A platen that supports the sheet to be printed;
A printing device comprising:
The platen includes an ink receiver that receives ink discharged from the print head. The ink receiver has a plurality of ink grooves that guide the received ink, and absorbs ink received by the ink receiver. An absorber is held by the platen, and the printing apparatus has a mechanism for changing an inclination angle of the ink receiver.   When the platen is viewed from above, a part of the absorber is exposed, and the side of the platen where the absorber is held is lowered by the mechanism, and the inclination angle of the ink receiver is increased. The printing apparatus according to claim 10.   The mechanism sets the ink receiver to a first inclination angle when ink is ejected from the print head, and a second inclination angle larger than the first inclination angle at a predetermined timing when ink is not ejected from the print head. The printing apparatus according to claim 10, wherein the ink receiver is moved so that   The printing apparatus according to claim 10, wherein the plurality of ink grooves are inclined grooves whose groove bottoms are inclined, and ink is guided to the absorber by the action of gravity. .   14. A rib for blocking ink is provided adjacent to a side of the plurality of ink grooves where the absorber is not provided in a direction in which the sheet is conveyed. The printing apparatus according to any one of the above.   The platen is provided with a rib having a head higher than the heads of the plurality of ink grooves on the downstream side of the absorber in a direction in which the sheet is conveyed to support the sheet from the back surface. The printing apparatus according to claim 14.   The printing apparatus according to claim 1, wherein the printing apparatus is a serial printer, and the print head is mounted on a carriage that reciprocates.

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