Method and apparatus for ink jet printing on textiles
First Claim
Patent Images
1. A digital printing method comprising:
- providing a printhead in a printing apparatus configured to digitally print an image on a substrate by scanning a progressively indexed series of lines across the substrate while selectively depositing, simultaneously from a plurality of nozzles, a plurality of drops of ink, on demand, on the substrate, under programmed control, to form the image on the substrate;
driving the printhead across the substrate with a linear servo motor having a stator extending parallel to and transverse the support and an armature moveable on the stator; and
digitally printing the image on the substrate with the printhead by so driving the printhead with the armature across the support on the stator of the linear servo motor parallel to the support and directed toward the support while selectively depositing drops of ink on demand as the linear servo motor moves the printhead relative to the support.
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Abstract
Ink jet printing is provided on large area substrates such as wide width textile webs. The printheads are driven by linear servo motors across a bridge that extends across the substrate. The timing of the jetting of the ink is coordinated with the motion of the printheads, so that the heads can be rapidly moved and the ink can be jetted while the printheads are accelerating or decelerating as they move on the bridge. Preferably, ultraviolet (UV) light curable ink is jetted and first partially cured with UV light and then subjected to heating to more completely reduce uncured monomers of the ink on the substrate.
61 Citations
20 Claims
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1. A digital printing method comprising:
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providing a printhead in a printing apparatus configured to digitally print an image on a substrate by scanning a progressively indexed series of lines across the substrate while selectively depositing, simultaneously from a plurality of nozzles, a plurality of drops of ink, on demand, on the substrate, under programmed control, to form the image on the substrate;
driving the printhead across the substrate with a linear servo motor having a stator extending parallel to and transverse the support and an armature moveable on the stator; and
digitally printing the image on the substrate with the printhead by so driving the printhead with the armature across the support on the stator of the linear servo motor parallel to the support and directed toward the support while selectively depositing drops of ink on demand as the linear servo motor moves the printhead relative to the support. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
the printing includes jetting ink from the printhead onto the substrate.
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3. The method of claim 2 further comprising:
controlling the jetting of the ink by advancing the timing thereof in relation to the speed of the printhead across the substrate.
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4. The method of claim 2 further comprising:
controlling the jetting of the ink by advancing the timing thereof in relation to the speed of the printhead across the substrate to compensate for transverse displacement of the ink due to the velocity of the printheads parallel to the substrate.
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5. The method of claim 2 further comprising:
controlling the jelling of the ink by advancing the timing thereof in relation to the speed of the printhead across the substrate to compensate for transverse displacement of jetting ink due to the velocity of the printheads parallel to the substrate.
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6. The method of claim 1 wherein:
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the driving of the printhead includes accelerating and decelerating the printhead while driving it across a substrate with the linear servo motor; and
the printing includes printing on the substrate while the head is accelerating or decelerating.
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7. The method of claim 6 wherein:
the printing includes jetting ink from the printhead onto the substrate while the head is accelerating or decelerating.
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8. The method of claim 7 further comprising:
controlling the jetting of the ink by advancing the timing thereof in relation to the speed of the printhead across the substrate.
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9. The method of claim 1 wherein:
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the substrate is a textile; and
the printing includes jetting ink from the printheads onto the surface of the textile.
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10. The method of claim 1 wherein:
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the digitally printing of the image on the substrate includes printing the image directly from information in an electronic file; and
the image is printed by controlling the linear servo to drive the printhead in response to the information from the electronic file.
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11. The method of claim 1 wherein:
the printhead includes a plurality of nozzles and the printing is performed in a scanning motion on the substrate by selectively and simultaneously depositing drops of ink of a plurality of different colors onto the substrate.
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12. A digital printing apparatus comprising:
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a substrate support;
a linear servo motor having a stator extending parallel to and transverse the support and an armature moveable on the stator;
a digital printhead moveable with the armature across the support on the stator of the linear servo motor parallel to the support and directed toward the support and operable to selectively deposit drops of ink on demand as the linear servo motor moves the printhead relative to the support;
a controller operable to drive the linear servo motor parallel to the support and to operate the printhead in synchronism with the movement of the servo motor to print an image on a substrate on the support in accordance with data from an electronic source file. - View Dependent Claims (13, 14, 15, 16, 17)
the printhead is an ink jet printhead.
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14. The apparatus of claim 13 wherein:
the controller is operable to time the jetting of the ink from the printhead in relation to the speed of the linear servo motor.
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15. The apparatus of claim 13 wherein:
the controller is operable to time the jetting of the ink from the printhead in relation to the speed of the linear servo motor by advancing or retarding the timing of the jetting of the ink from the printhead in relation to the speed of the printhead across the substrate to compensate for transverse displacement of the ink due to the velocity of the printhead parallel to a substrate on the support.
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16. The apparatus of claim 12 wherein:
the controller is operable to control the printing of the printhead so as to accurately produce an image from the electronic source file when the servo motor is accelerating or decelerating.
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17. The apparatus of claim 12 wherein:
the printhead includes a plurality of nozzles operable to print in a scanning motion on the substrate by selectively and simultaneously depositing drops of ink of a plurality of different colors onto the substrate.
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18. A textile printing apparatus comprising:
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a textile-substrate support;
a bridge extending transversely across the support that is mounted for longitudinal movement between the bridge and a substrate on the support;
an ink jet printhead moveable across the bridge and positioned to deposit a dot pattern of ink onto a textile substrate on the support by scanning in transverse lines across the substrate progressively along a substrate on the support; and
a computer controlled linear servo motor positioned to move the printhead across the bridge, the servo motor having a stator extending parallel to and transverse the support and an armature moveable on the stator;
the printhead being moveable with the armature across the support on the stator of the linear servo motor parallel to the support and directed toward the support and operable to selectively deposit drops of ink on demand as the linear servo motor moves the printhead relative tot he support. - View Dependent Claims (19)
the printhead includes a plurality of nozzles operable to print in a scanning motion on the substrate by selectively and simultaneously depositing drops of ink of a plurality of different colors onto the substrate.
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20. An ink jet printing method comprising:
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driving a printhead across a substrate with a linear servo motor having a stator extending parallel to and transverse the support and an armature moveable on the stator, the printhead being moveable with the armature across the support on the stator of the linear servo motor parallel to the support and directed toward the support and operable to selectively deposit drops of ink on demand as the linear servo motor moves the printhead relative to the support; and
jetting drops of ink on demand on the substrate with the printhead at a controlled dot density while so driving the printhead across the substrate;
controlling the jetting of the ink by advancing the timing thereof in relation to the speed of the printhead across the substrate to compensate for transverse displacement of the ink due to changes in the velocity of the printheads parallel to the substrate.
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Specification