WO2021076095A1 - Dispositifs d'impression portatifs - Google Patents

Dispositifs d'impression portatifs Download PDF

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Publication number
WO2021076095A1
WO2021076095A1 PCT/US2019/056114 US2019056114W WO2021076095A1 WO 2021076095 A1 WO2021076095 A1 WO 2021076095A1 US 2019056114 W US2019056114 W US 2019056114W WO 2021076095 A1 WO2021076095 A1 WO 2021076095A1
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WO
WIPO (PCT)
Prior art keywords
spreader
print
printing device
region
handheld printing
Prior art date
Application number
PCT/US2019/056114
Other languages
English (en)
Inventor
Xavier OLIVA VENTAYOL
Vito DI VIRGILIO
Rafael ULACIA PORTOLES
Original Assignee
Hewlett-Packard Development Company, L.P.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hewlett-Packard Development Company, L.P. filed Critical Hewlett-Packard Development Company, L.P.
Priority to PCT/US2019/056114 priority Critical patent/WO2021076095A1/fr
Publication of WO2021076095A1 publication Critical patent/WO2021076095A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/36—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for portability, i.e. hand-held printers or laptop printers

Definitions

  • Handheld printing devices may be held and moved by a hand of a user to directly deliver a print agent onto a print media for printing an image.
  • FIG. 1a and FIG. 1b respectively illustrate a front view and a bottom view of a handheld printing device according to an example of the present disclosure.
  • FIG. 2 illustrates a bottom view of a handheld printing device according to an example of the present disclosure.
  • FIG. 3 illustrates a bottom view of a handheld printing device according to an example of the present disclosure.
  • FIG. 4 illustrates a bottom view of a handheld printing device according to an example of the present disclosure.
  • FIG. 5 illustrates a bottom view of a handheld printing device according to an example of the present disclosure.
  • FIG. 8 illustrates a bottom view of a handheld printing device according to an example of the present disclosure.
  • FIG. 7 is a block diagram of an example of a method to print an image onto a print media according to the present disclosure.
  • An image may be directly printed on a print media by using a print head mounted on a handheld printing device,
  • a handheld printing device may be held by a hand of a user which may move the handheld printing device in any direction or position.
  • a user may freely move a handheld printing device close to a print zone of a print media.
  • the handheld printing device may be moved along a print direction to print an image on a print zone of a print media. Accordingly, a handheld printing device may be used for delivering a print agent onto different types of print media and to different sizes and positions of print zones.
  • FIG. 1a and FIG. 1b respectively illustrates a front view and a bottom view of a handheld printing device according to an example of the present disclosure.
  • the handheld printing device 10 comprises a print head 20 to deliver a print agent onto a print zone of a print media 3 and a spreader system 30 to stretch the print media 3 in the print zone when the print head 10 is moved along the print direction 2.
  • the print direction is perpendicular to the paper.
  • a print zone of a print media is an area of the print media on which print agent is to be deposited to form an image.
  • the spreader system 30 may contact the print media to stretch or tension the print media 3 when the print head 20 of the handheld printing device 10 is advancing along the printing direction 2 to avoid wrinkles and to improve flatness in the print zone of the print media 3.
  • the spreader system may thus stretch the printing zone in front or below the print head.
  • the printing zone may thus be stretched or tensioned in a direction substantially perpendicular to the spreader system. Avoiding wrinkles in the print zone of the print media 3 may reduce printing defects and may prevent the print media 3 from contacting the print head 20. Damages caused on the print head by an undesirable contact with the print media may thus be reduced.
  • the spreader system may further maintain a distance or a gap between the print head and the print media.
  • a print agent may be delivered through a plurality of nozzles arranged in the print head. A distance between the plurality of nozzles and the print media may thus be maintained. The distance between a nozzle and the print media may be called nozzle to substrate distance or nozzle to print media distance. A nozzle to substrate distance may therefore be maintained within predetermined distances. The print agent may thus be delivered at predetermined position or distance with respect to the print zone. Quality and reliability of the printing process may thus be improved.
  • the print media may be placed in a holder.
  • the holder may slightly stretch the whole print media.
  • the spreader system may precisely increase the tension applied in the print zone at which a print agent is to be delivered by the print head. A substantially uniform and fiat print zone may thus be obtained.
  • the print media may be directly placed on a support surface.
  • the support surface may be substantially flat.
  • the support surface may be for example a fable.
  • the print media may be a garment
  • a garment is a piece of clothing.
  • Examples of garments may be a T-shirt, a shirt, a pair of trousers, a cap or a flag.
  • a garment may be a fabric garment.
  • the garment may comprise fibers permeable to a print agent in gaseous state when a predetermined temperature is applied to allow a print agent to enter in between, in some examples, the fabric garment may be made from a polymer.
  • polyester may be a polymer for a fabric garment.
  • the fabric garment may be made from cotton.
  • Printing an image on a garment by depositing a print agent with a print head directly on the garment may be called as direct to garment printing.
  • the handheld printing device according to any of the examples herein disclosed may be used for direct to garment printing.
  • the print media e.g, a fabric garment
  • the print media may comprise a mesh having a plurality of openings.
  • the openings of the mesh of the print media may be expanded. Penetration of the print agent into the print media may thus be made easier and the color fastness and durability of the print image may consequently be improved.
  • the print head may be provided with a plurality of nozzles to deliver print agent, e.g. ink or other printing fluids, onto the print zone so as to print an image on the print media.
  • delivering includes firing, ejecting, spitting or otherwise depositing print agent or ink.
  • the print head may comprise a print agent chamber containing print agent to be delivered onto the print zone of the print media.
  • the print head may comprise a heating element to cause a rapid vaporization of print agent in the print agent chamber, increasing an internal pressure inside this print agent chamber. This increase in pressure makes a drop of print agent exit from the print agent chamber to the print zone through a nozzle.
  • a print head of this type may be called as thermal inkjet print head.
  • a piezo electric may be used to force a drop of print agent to be delivered from a print agent chamber onto the print zone of the garment. A voltage may be applied to the piezo electric, which may change its shape. This change of shape may force a drop of print agent to exit through the nozzle.
  • These print heads may be called as piezo electric print heads.
  • the handheld printing device may include a sensor.
  • the sensor may detect for example a position, an inclination or a speed of the handheld printing device, in some examples, the handheld printing device may include a sensor or a plurality of sensors to determine a position, an inclination and a speed of the handheld printing device,
  • the handheld printing device may comprise an advancing system for moving or assisting the movement over the print zone to directly apply a print agent on the print zone.
  • An advancing system may be for example a roller. The roller may contact the print media to assist the user to displace the print head along a print direction. The advancing system may also improve the parallelism of the handheld printing device with respect to the print media when advance along a print direction.
  • the handheld printer device may comprise a battery to power the handheld printing device.
  • the handheld printing device may operate independently from an electrical grid.
  • the handheld printing device extends from a trailing edge 12 to a leading edge 11 in the print direction 2, in this disclosure, the leading edge and the trailing edge shall be respectively understood as the front side and the rear side of the handheld printing device when the handheld printing device is moved along the print direction.
  • the leading edge is the most advanced position of the handheld printing device and then is the first edge of the handheld printing device which passes over a point of the print media, whereas the trailing edge is the last edge of the handheld printing device which passes over the point of the print media.
  • leading edge may be substantially perpendicular to the print direction.
  • the trailing edge may be substantially parallel to the leading edge.
  • the print head 20 is between the leading edge 11 and the trailing edge 12,
  • the spreader system is between the leading edge 11 and the print head 20.
  • a portion of the spreader system may be between the print head and the leading edge.
  • the spreader system is substantially parallel to the leading edge.
  • the spreader system may comprise portions inclined with respect to the leading edge.
  • the spreader system may comprise any shape or configuration according to any of the examples herein disclosed.
  • a first 15 and a second 16 lateral side oppositely extends from the trailing edge 12 to the leading edge 11 .
  • the handheld printing device comprises a bottom surface 13 to face the print media 3.
  • the bottom surface 13 may have a shape substantially corresponding to the shape of a portion of the print media.
  • the bottom surface may be parallel to the print media.
  • the spreader system 30 protrudes from the bottom surface 13. In this way, the spreader system may contact the print media to stretch the print zone and to maintain a gap between the print head and the print media.
  • the spreader system may protrude substantially perpendicular to the bottom surface.
  • the spreader system may protrude from the bottom surface forming an acute angle with respect to the bottom surface, in some examples, the spreader system may protrude inwardly towards the print head. In some examples, the spreader system may protrude outwardly towards the leading edge or towards the lateral sides,
  • the spreader system may comprise a spreader strip to apply a pressure against the print media to stretch the print zone, in some examples, the spreader system may comprise a plurality of spreader strips.
  • the spreader system may comprise a spreader brush to tension the print media in the print zone. In some examples, the spreader system may comprise a plurality of spreader brushes. [0035] In some examples, the spreader system may comprise a spreader roller to stretch the print media in the print zone. In some examples, the spreader system may comprise a plurality of spreader rollers.
  • the spreader system may comprise metal, e.g. steel. In some examples, the spreader system may comprise plastic,
  • FIG. 2 illustrates a bottom view of a handheld printing device according to an example of the present disclosure.
  • the handheld printing device 10 comprises a print head 20 to be moved along a print direction 2 and to deliver a print agent onto a print zone of a print media (not illustrated in FIG. 2 as is a bottom view).
  • the handheld printing device 10 of FIG. 2 extends from a trailing edge 12 to a leading edge 11 in the print direction 2 and comprises a first 31 and a second spreader region 32 to contact the print media when the print head 20 is moved along the print direction 2.
  • the print head is at least partially between the first spreader region 31 and the second spreader region 32.
  • the first spreader region 31 and the second spreader region respectively extend in a direction that converges towards the leading edge.
  • the first spreader region 31 and the second spreader region 32 of this figure contact the print media to tension the print media in a direction inclined with respect to the print direction.
  • the print zone may thus be stretched outwardly in a direction substantially perpendicular to the first and to the second spreader regions. This inclination creates a force component in a direction substantially perpendicular to the print direction, increasing the tension applied to the print zone of the print media.
  • the applied tension aids in the formation of a smooth and tensioned print zone for reducing the risk of having wrinkles in the print zone.
  • the spreader system comprises the first spreader region 31 and the second spreader region 32.
  • the first and the second spreader regions may extend towards the print direction when the print head is moved along the print direction.
  • the first and the second spreader regions may be inclined with respect to the leading edge.
  • the handheld printing device may comprise a substantially rectangular shape.
  • the first spreader region 31 is inclined with respect to the first lateral side 15 and the second spreader region 32 is inclined with respect to the second lateral side 18.
  • the handheld printing device may comprise a substantially triangular shape and the first spreader region may be substantially parallel to the first lateral side and the second spreader region may be substantially parallel to the second lateral side.
  • the spreader system comprises a front spreader strip 40 comprising a central portion 43 substantially perpendicular to the print direction 2, a first 41 and a second end portions 42 forming an obtuse angle b, b’ with respect to the central portion 43.
  • the first end portion 41 comprises the first spreader region 31 and the second end portion 42 comprises the second spreader region 32.
  • the central portion 43 may be between the leading edge and the print head. In some examples, the central portion may be substantially parallel to the leading edge, in some examples, the central portion may be substantially straight, in some examples, the central portion may be substantially curved.
  • the print head 20 may be between the first end portion 41 and the second end portion 42, i.e. between the first spreader region and the second spreader region.
  • the front spreader strip may protrude a height from the bottom surface of the handheld printing device.
  • the front spreader strip may extend substantially perpendicular to the bottom surface of the handheld printing device.
  • a height of the first and of the second end portions may be higher than a height of the central portion.
  • the first and the second end portions may contact the print media thereby providing a gap between the central portion and the print media when the handheld printing device is moved along the print direction.
  • the front spreader strip may comprise a substantially uniform height and may thus substantially uniformly contact the print media.
  • the first spreader region 31 extends from a rear end 313 to a front end 312 along a first spreader region axis 311 and the second spreader region 32 extends from a rear end 323 to a front end 322 along a second spreader region axis 312.
  • the front end 312 of the first spreader region is substantially adjacent to the leading edge 11 of handheld printing device.
  • the front end 322 of the second spreader region may be substantially adjacent to the leading edge 11. in this example, the second spreader region is a mirror image of the first spreader region.
  • the front end 312 of the first spreader region of this figure is between the leading edge 11 and the print head 20. Additionally, the front end 322 of the second spreader region may be between the leading edge and the print head. The front ends may thus contact the print media to stretch the print zone before the print head reaches a predetermined position. Accordingly, a printing fluid may be delivered by the print head 20 in a portion of the print media that has previously been contacted by at least the front ends thereby being a stretched portion of the print media.
  • the rear end 313 of the first spreader region may be substantially adjacent or close to the first lateral side 15. Accordingly, the first spreader region may substantially extend along a first spreader region axis from the first lateral side to the leading edge.
  • the rear end of the first spreader region may be adjacent or dose to the trailing edge and the first spreader region may substantially extend along a first spreader region axis from the trailing edge to the leading edge.
  • the rear end 323 of the second spreader region may be substantially adjacent to second lateral side 16 and the second spreader region may substantially extend along a second spreader region axis 321 from the second lateral side 16 to the trailing edge 11.
  • the second spreader region may extend from the trailing edge to the leading edge along a second spreader region axis.
  • the first spreader region axis 311 forms an angle a between
  • the angle a between the first 311 and the second spreader axis 321 may be between 150° and 20°. In some examples, the angle a between the first 311 and the second spreader axis 321 may be between 130° and 40°. In some examples, the angle a between the first 311 and the second spreader axis 321 may be between 110° and 70°.
  • the first spreader region axis 311 of this figure converges with the second spreader region axis 321 towards the leading edge 11 ,
  • the first and the second spreader region may thus extend towards the print direction when the print head is moved along the print direction.
  • the spreader regions may exert a friction force norma! to the respective spreader region axis.
  • the print zone may thus be tensioned outwards with respect to the handheld printing device.
  • This friction force may comprise a frictional force component perpendicular to the print direction, e.g. from the first lateral side 15 to the second lateral side 16, and a frictional force component parallel to the print direction.
  • the frictional force component parallel to the print direction may exert a resistance force against the movement of the handheld printing device sliding along the print direction.
  • the angle a formed between the first and the second spreader regions may depend on the type of print media, on the size of the print zone or on the material of the spreader regions, e.g. on the friction coefficient. For example, spreader regions with high friction coefficients may be arranged at lower angles to reduce the frictional force component against the print movement.
  • the angle between the first spreader axis and the second spreader axis may be variable. For example, the inclination and/or the position the first end portion 41 and the second end portion 42 of the front spreader strip may be adjusted.
  • the first end portion and the second end portion may be rotatably connected to the bottom surface of the handheld device to adjust the inclination of the spreader regions with respect to the print direction.
  • FIG. 3 illustrates a bottom view of a handheld printing device according to an example of the present disclosure.
  • the handheld printing device 10 comprises a print head 20 to be moved along a print direction 2 and to deliver a print agent onto a print zone of a print media.
  • the handheld printing device 10 of FIG. 3 comprises a first 31 and a second spreader region 32 respectively extending in a direction that converges towards the leading edge 11 to stretch the print media in the print zone when the print head 20 is moved along the print direction 2.
  • the print head 20 is at least partially between the first spreader region 31 and the second spreader region 32.
  • the spreader system comprises a first spreader strip 51 and a second spreader strip 52.
  • the first spreader strip and the second spreader strip may extend towards the print direction when the print head is moved along the print direction.
  • the first spreader strip 51 of this figure comprises the first spreader region and the second spreader strip 52 comprises the second spreader region 32.
  • the spreader strips of this figure extend inwardly through the first 311 and the second spreader axis 321 towards the print direction to stretch the print media between the first and the second spreader strips.
  • the inclination of the spreader regions with respect to the print direction may reduce the resistance offered by the spreader system against the movement of handheld printing device and may increase the stretch effect in the print zone in front and/or below the print head, in this figure, the spreader regions may stretch a portion of print media between the first and the second spreader regions in a direction substantially perpendicular the print direction.
  • the angle a between the first 311 and the second spreader axis 321 may be between 170° and 5°. In some examples, the angle a between the first 311 and the second spreader axis 321 may be between 150° and 20°. in some examples, the angle a between the first 311 and the second spreader axis 321 may be between 130° and 40°. in some examples, the angle a between the first 311 and the second spreader axis 321 may be between 110° and 70°.
  • the angle between the spreader axes or between the spreader regions may be according to any of the examples herein disclosed.
  • the angle between the first and the second spreader strips, and consequently between the first and the second spreader regions, may be adjusted, for example, depending on the type of print media.
  • the spreader strips may be rotatably connected to a bottom surface of the handheld printing device.
  • the spreader strips may rotate about an axis substantially perpendicular to the bottom surface.
  • the first and the second spreader strips may protrude from a bottom surface of the handheld printing device to contact the print media and to maintain a gap between the print media and the print head. A nozzle to substrate distance may thus be maintained within predetermined distances.
  • the first and the second spreader strips may protrude substantially perpendicular to the bottom surface.
  • the first and the second spreader strips may protrude inwardly towards the print head forming an acute angle with respect to the bottom surface.
  • the first spreader strip may protrude outwardly towards the first lateral side and the second spreader strip may protrude outwardly towards the second lateral side.
  • the first spreader region 31 extends from a rear end 313 adjacent to the trailing edge 12 to a front end 312 adjacent to the leading edge 11 along a first spreader region axis 311 .
  • the second spreader region 32 extends from a rear end 323 close to the trailing edge 12 to a front end 322 adjacent the leading edge 11 along a second spreader region axis 321.
  • the handheld printing device may thus be substantially supported
  • the first and the second spreader region in this example first and second spreader strips, extend from the leading edge to the trailing edge, the stability of the handheld printing device when moved along the print direction is increased. Tilting of the leading edge with respect to the trailing edge may be prevented, A distance between the bottom surface of the handheld printing device and the print media may thus be accurately maintained. Contacting the print head with the print media may consequently be prevented.
  • the first spreader region 31 is between a first lateral side 15 of the handheld printing device and the print head 20 and the second spreader region 32 is between a second lateral side 16 and the print head 20.
  • the front end of the first and the second spreader regions may be in front of the print head, i.e. between the print head and the leading edge.
  • FIG. 4 illustrates a bottom view of a handheld printing device according to an example of the present disclosure.
  • the example of FIG. 4 is similar to the example of FIG. 3, however the handheld printing device 10 of FIG. 4 comprises a plurality of first spreading strips 51 and a plurality of second spreading strips 52.
  • the first spreading strips and the second spreading strips may be according to any of the examples herein disclosed.
  • Using a plurality of spreading may allow using a more competitive material with a lower friction material for the spreading strips and/or increasing the tension applied, in addition, stability and parallelism between handheld printing device and the print media may be increased. Tilting of the leading edge with respect to the trailing edge may be avoided.
  • the plurality of first spreading strips 51 comprises the first spreading region 31 and the plurality of second spreading strips 52 comprises the second spreading region 32.
  • the spreading regions are thus formed by the plurality of the spreading strips.
  • the first 31 and the second spreader region 32 of the this figure extend from a rear end 313, 323 substantially adjacent to the trailing edge 12 to a front end 312, 322 substantially adjacent to the leading edge 11 along a spreader axis 311 , 321.
  • a first spreader strip of the plurality of first spreader strips may extend from the trailing edge to the leading edge, in some examples, a first spreader strip of the plurality of first spreader strips may extend inwardly from the first lateral side to the leading edge. In some examples, a first spreader strip may extend from the trailing edge to the leading edge and another first spreader strip may extend from the first lateral side to the leading edge.
  • first spreader strips may be parallel to each other. Accordingly, first spreader strips may extend along the first spreader region axis which forms an angle with the second spreader region according to any of the examples herein disclosed. [0067] The plurality of second spreader strips may be according to the any of the examples of first spreader strips herein disclosed,
  • the handheld printing device may comprise a first spreader brush and a second spreader brush.
  • the first spreader brush may comprise a first spreader region and a second spreader brush may comprise a second spreader region.
  • the first and the second spreader regions may be according to any of the examples herein described.
  • the spreader brushes may comprise a plurality of flexible filaments that bends to fit the print media tensioning the print zone.
  • the first and the second spreader brushes may be arranged at the handheld printing device according to any of the examples herein described with respect to the first and the second spreader strips.
  • the spreader brushes may provide an effect similar to the effect provided by the spreader strips.
  • the handheld printing device may comprise a plurality of first spreader brushes and a plurality of second spreader brushes, in some examples, the handheld printing device may comprise spreader brushes and spreader strips.
  • FIG. 5 illustrates a bottom view of a handheld printing device according to an example of the present disclosure.
  • the spreader system comprises a first spreader roller 61 and a second spreader roller 62 which are arranged at opposite sides of the print head 20.
  • the first spreader roller 61 and the second spreader roller 62 of this figure respectively comprise a first 31 and a second spreader region 32 according to any of the examples herein described.
  • the spreader rollers may extend from a trailing edge or from lateral sides in a direction that converges towards a leading edge according to any of the examples herein disclosed.
  • the first spreader roller 61 extends and rotates about a first spreader region axis 311
  • the second spreader roller 62 extends and rotates about a second spreader region axis 321
  • the angle between the first 311 and the second spreader region axis 321 may be according to any of the examples herein described.
  • FIG. 6 illustrates a bottom view of a handheld printing device according to one example of the present disclosure.
  • the handheld printing device 10 comprises a print head 20 to deliver a print agent onto a print zone of a print media.
  • the handheld printing device 10 comprises a spreader system to stretch the print media in the print zone when the print head is moved along a print direction 2.
  • the spreader system of this example comprises a first 31 and a second spreader region 32 extending towards the print direction when the print head 20 is moved along the print direction 2.
  • the spreader system comprises a front spreader roller 70 extending substantially perpendicular to the print direction 2 from a first 74 to a second end 75.
  • the front spreader roller 70 extends and rotates about a front spreader roller axis 76 which is substantially perpendicular to the print direction 2.
  • the front spreader roller 70 of this figure comprises a plurality of first 71 and second helical rings 72 oppositely extending from a central portion 73 of the front spreader roller 70 towards the ends 74, 75,
  • the plurality of first helical rings 71 comprises a first spreader region 31 and the plurality of second helical rings 72 comprises a second spreader region 32.
  • the first 31 and the second spreader region 32 may be according to any of the examples herein disclosed.
  • the first spreader region 31 may extend along a first spreader region axis 311 and the second spreader region 32 may extend along a second spreader axis 321.
  • the first spreader axis 311 and the second spreader axis 321 may converge towards the leading edge forming an angle a.
  • the front spreader roller 70 may rotate about the front spreader roller axis 76.
  • the first helical rings 71 of this example are misaligned with respect to the front spreader roller axis 73. in this figure, the first helical rings 71 are oriented along the first spreader region axis 311.
  • the second helical rings may be oriented along the second spreader region axis and may thus be misaligned with respect to the front spreader roller axis.
  • helical rings mean helical threads of a roller that contacts the print media forming an acute angle with respect to the print direction.
  • the helical rings or threads forms an acute angle with respect to front spreader roller axis.
  • the misalignment of the helical rings may cause a force component in a direction substantially perpendicular to the print direction when the front spreader roller rotates when the handheld printing device advances along the print direction.
  • This effect may be as previously described according to any of the examples herein described in which the first and the second spreader regions extend to the leading edge. Accordingly, flatness of the print zone may be increased.
  • FIG. 7 is a block diagram of an example of a method to print an image on a print media according to the present disclosure.
  • the method 500 comprises placing 510 a handheld printing device having a spreader system onto a print media, moving 520 the handheld printing device over the print media so that the spreader system stretches the print media in a print zone and depositing 530 a print agent on the stretched print zone.
  • the method 500 to print an image on a print media may use a handheld printing device according to any of the examples herein described.
  • the handheld printing device may be placed on a predetermined distance over a predetermined position of the print media.
  • the spreader system may contact the print media to maintain a gap between a print head of the handheld printing device and the print media, so that a nozzle to substrate distance may thus be maintained within a predetermined upper distance and a lower distance.
  • the print media may be placed in a holder.
  • the holder may hold or retain the print media when the handheld printing device advances.
  • the method may thus comprise holding the print media with a holder.
  • the print media may be placed on a support surface.
  • the handheld printing device may be moved over the print media along a print direction.
  • the spreader system may contact the print media to stretch the print media in a print zone and to maintain a gap or a distance between the print head and the print media.
  • the spreader system may be according to any of the examples herein disclosed.
  • the movement of the handheld printing device may be assisted by an advancing system as previously described.
  • a print agent may be deposited when the handheld printing device is moved along a print a direction on the stretched print zone.
  • depositing a print agent may comprise heating a print agent in a print agent chamber of a print head and delivering the heated print agent through a plurality of nozzles to the print zone.
  • depositing a print agent may comprise applying a voltage to a piezo electric of a print agent chamber of a print head and delivering a print agent to the print zone.
  • the print agent deposited on the print zone may be sublimated.
  • the print agent deposited on the print zone may be heated to a temperature higher than the sublimation temperature of the print agent.
  • a print agent e.g. ink
  • a print agent is converted from a solid to a gaseous state to penetrate into a fabric print media substrate to form an image.
  • a print agent is converted to gas which permeates the fibers of the fabric print media. The gas is again converted to a solid state when the temperature drops and the print agent is thus absorbed and integrated into the fibers. An image is thus printed on a fabric print media.
  • the method may comprise adjusting the position or the orientation of portions of the spreader system.
  • the method may comprise adjusting the direction of a first and a second spreader regions. This adjustment may comprise rotating the first and the second spreader regions, to modify the angle formed between them. Tension applied to the print media may thus be adjusted.
  • the preceding description has been presented to illustrate and describe certain examples. Different sets of examples have been described; these may be applied individually or in combination, sometimes with a synergetic effect. This description is not intended to be exhaustive or to limit these principles to any precise form disclosed. Many modifications and variations are possible in light of the above teaching. It is to be understood that any feature described in relation to any one example may be used alone, or in combination with other features described, and may also be used in combination with any features of any other of the examples, or any combination of any other of the examples.

Abstract

L'invention concerne à titre illustratif des procédés pour imprimer une image sur un support d'impression et des dispositifs d'impression portatifs. Un dispositif d'impression portatif comprend une tête d'impression destinée à délivrer un agent d'impression sur une zone d'impression d'un support d'impression et un système extenseur destiné à étirer le support d'impression dans la zone d'impression lorsque la tête d'impression est déplacée le long d'une direction d'impression.
PCT/US2019/056114 2019-10-14 2019-10-14 Dispositifs d'impression portatifs WO2021076095A1 (fr)

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PCT/US2019/056114 WO2021076095A1 (fr) 2019-10-14 2019-10-14 Dispositifs d'impression portatifs

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6357939B1 (en) * 2001-02-02 2002-03-19 Hewlett-Packard Company Method of and apparatus for handheld printing of images on a media
US20080170900A1 (en) * 2007-01-15 2008-07-17 Edmund Hulin James Hand-Held Printer Guides
US20090035043A1 (en) * 2007-07-30 2009-02-05 Hewlett-Packard Development Company Lp Media guide

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6357939B1 (en) * 2001-02-02 2002-03-19 Hewlett-Packard Company Method of and apparatus for handheld printing of images on a media
US20080170900A1 (en) * 2007-01-15 2008-07-17 Edmund Hulin James Hand-Held Printer Guides
US20090035043A1 (en) * 2007-07-30 2009-02-05 Hewlett-Packard Development Company Lp Media guide

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