CA2120602A1 - Ink-jet printer - Google Patents
Ink-jet printerInfo
- Publication number
- CA2120602A1 CA2120602A1 CA002120602A CA2120602A CA2120602A1 CA 2120602 A1 CA2120602 A1 CA 2120602A1 CA 002120602 A CA002120602 A CA 002120602A CA 2120602 A CA2120602 A CA 2120602A CA 2120602 A1 CA2120602 A1 CA 2120602A1
- Authority
- CA
- Canada
- Prior art keywords
- ink
- image
- jet
- moving member
- substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
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
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/0057—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material where an intermediate transfer member receives the ink before transferring it on the printing material
-
- 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
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
Landscapes
- Ink Jet (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
Abstract
2120602 9307000 PCTABS00021 An ink-jet or bubble jet system (10) in which the ink is sprayed on an intermediate member (12) and transferred therefrom to the final substrate (18). The member is preferably heated (16) to evaporate a substantial portion of the carrier liquid of the ink so as to reduce wicking in the final substrate (18). In one embodiment of the printer a layer of resin is deposited on the surface (14) of the member (12) before the deposition of the image. This layer is transferred to the substrate with the image and protects the image and optionally improves its bonding to the substrate (18).
Description
2~2060~
2~I S05 INK-JET PRINTER
2~I S05 INK-JET PRINTER
3 The present invention relates generally to printing
4 apparatus and more particularly to ink-jet printing apparatus.
6 BACXG~OUND OF THE INVENTION
7 Ink- jet and bubble- jet printers are kno~n in the art .
8 In such printers, droplets of hot wax-based lnk or ink in a . 9 water-based solvent are e jected in image ror~ing configuration from a print-head onto a sheet of paper or 11 other substrate. The substrate may be heated so as to f ix 12 the image on the su~strate by evaporation of the water 13 solvent or melting of the waxy ink. However, the images 14 formed by such printers are often blurred somewhat, as a L5 result of the "wicking'l of the ink into the paper, due to 16 flow of the water-based solvent or melted waxy ink.
17 Attempts to correct thls proble~ by increasing the 18 viscosity of the ink have not been particularly successful, 19 since the ink-jet process does not work well with viscous ink.
21 Japanese Patent publicatioll 1 1467S0 describes an ink-2~ jet system in which W curable ink is applied to a glass 23 drum utilizing an ink droplet method. The ink is cured 24 using W light before it is transferred to a final su~strate.
26: SUM~ARY OF THE INVENTION
27~ It is the object of the present invention to pro~ide 8 ink-jet printing apparatus which produces a sharp and 29 un~lurred image on a substrate such as paper using conventional water-based or waxy in~. It is a further 31 object of the present inventi.on to provide multi-color ink-32 jqt printing apparatus in which very precise registration 33 of th~ color images is obtained. The present invention 34 accomplishes these objects by in~erposing an intermediate :.
3S member between the ink-jet head and the substrate, such 36 that the functions of image-formation and image-transfer 37 are separated into two distinct stages.
38 In the first stage, the ink-jet printing head is SU13STITUTE Sl IEET
"~ . ~
2~20602 1 operated in the conventional manner to form the desired 2 image, but instead of the image being formed directly on 3 the substrate, it is ~ormed on the surface of the a intermediate member. In the second stage, the image is transferred from the surface of the intermediate member to 8 _ 1~
2~
~37 ~ c f~ v~ ~ SlJ8STlTUTE SHEET
212~602 W093/07000 - 2 - PCT/NL91/001gO
t~
1 the desired final substrate. Interposing the in~ermedl~te 2 member affords ~he possibility of using conventional water-3 ~ased, non-viscous inks for the initial image formation, 4 and then evaporating a desired amount of the water solvent while the image is still on the intermediate member, prior 6 to final transfer to the substrate. Heating the water-based 7 and waxy inks allows for good transfer with~ut excessive 8 heating of the substrate, reducing power 'requirements of 9 the sy~tem.
Interposing the intermediat~ member also affords the 11 possibility of applying resins or binders onto the image 12 prior to final transfer, thereby enhancing the fixing of 13 the ink image and its adhesion to the substrate.
14 BRI:E~F DE8CRIPI'ION C)F ~IE DR~WI~
The present invention will be better understood and 16 appreciated from the following detailed description taken 17 in conjunction with the accompanying drawings in which:
18 Fig. 1 is a schematic representation of ink-jet 19 printing apparatus in accordance with an embodiment of the invention.
21 Fig. 2 is a schematic representation of ink-jet 22 printing apparatus in accordance with another embodiment of 23 the inYention.
24 D~TAI~ED DESCRIPTION OF PREFERRED ENBODINENT~
Reference is now made to Fig~ 1 which provides a 26 schematic representation of ink-j~t printing apparatus in 27 accordance with ~n embodiment of the present invention.
28 Included in the apparatus of Fig. 1 ~s an electronic 29 imaging control assembly 8 which comprises ~ microprocessor and other standard user operatad hardware and software as 31 are known in the art. Con~rol assembly B is connected to an 32 ink-jet assembly 10 which includes an ink-jet printing 33 head, li~uid ink and other ink-jet apparatus as are known 34 in the art. Slightly spaced from ink-jet assembly 10 is a drum 12 having a surface 14 which may be rigid but which 36 preferably is comprised of a resilient polymeric material.
37 Surface 14 is preferably coated with a non-sticking layer, 38 such as silicone, silicone rubber or teflon which is 2~206~2 , ... .
l abhesive to the ink.
2 When the apparatus is in operation, drum l2 rotates in 3 the direction of arrow ~3, and control assembly 8 is ~ operative to provide appropriate control commands to ink-jet assembly lO so as to caus~ ink-3et assembly lO to eject 6 droplets of ink in the direction of ~urface l4 such that 7 the drops of înk adhere to ~urface 14 in ~ desired image 8 configura ion. In accordance with a preferred embodiment of 9 the invention, surface 14 may be heated by means of an internal heater 16, or by means of a blower (not shown)~
ll Heater 16 is operative to evaporate a substantial portion 12 of the liquid carrier of the ink in ~olvent based inks, so 13 as to prevent '~wicking" of the image when it is transferred l4 to the final substrate, as described below.
After the ink image has been deposited on surface 14, 16 drum 12 continues to rotate and the surface bearing the ink 17 image is brou~ht into contact with a final substrate 18, 18 such as a web or a sheet of paper, which is fed into a nip l9 l9 between drum 12 and an impression roller 20. If surface l4 is slightly resilient, i~pxession roller 20 i5 21 preferably rigid. However, if surface l4 is solid, 22 impression roller 20 should have a slightly resilient 23 surface. It will ~e appreciated that as a re~ult of the 24 application of pressure at nip lg between the two surfaces, the ink image is transferred to final substrate 18 from the ~6 non-stic~ surf~ce l4 as the sub~rate is fed through the 27 nip.
28 The inventor has discovered that the specific 29 configuration of ink-jet printing apparatus described above produces an im~ge on the final substrate superior to that 31 produced by the conventional ink~jet apparatus known in the 32 art. Because the ink image is first produced on surface 14 33 of drum 12 and only then transferred to the final 34 substratel the ink-~et apparatus of the present invention effectively prevents "wicking" of the solvent based liquid 36 ink when the image is transferred to the final substrate.
37 Heating of surface l4 causes a substantial portion of the 3% liquid solvent to be evaporated prior to final transfer, ) 21~0602 l such that a very clean, concentrated image is transferred.
2 As a conse~uence, it is also unnecessary to heat the final 3 substrate so as to ~ix and dry the image after transfer 4 thereto.
It will also be appreciated that the apparatus of the 6 present inven~ion af~ords not only single color printing of 7 images but al~o multi~color printing of images. For multi 8 color image printing, ink-jet assembly lO~includes several 9 ink-jet sub-ascemblies, one for each of the process colors as is known in the art, and each such sub-assembly is 11 connected to control assembly ~. As drum l2 rotates, each 12 of the sub assemblies is operative to deposit an image of a 13 single color on surface 14. The use of drum 12 as an 14 intermediate member facilitates a much more precise registration of the colored images than direct printing on 16 paper, thereby providing a significantly sharper color 17 image on the final substrate.
18 Reference is now made to Fig. 2 which shows ink-jet l9 printing apparatus in accordance with another embodiment of the present invention. The apparatus of Fig. 2 is similar 2l to that of Fig. l except t~at upstream of ink-jet assembly 22 lO there is provided a squeegee roller 24 which engages 23 surface l4 of drum 12. In a spacP 26, between squeegee 24 roller 24 and drum 12, is a quantity of a binder resin, preferably a polymeric binder with or without solvent. The 26 binder resin in space 26 is rep~enished by a dispenser 27 assembly 28. S~ueegee roller 24 rotates in the direction 28 opposite that of drum 12~ as shown by arrow 25, and is 29 operative to cause a controlled thin layer of the binder resin to ~e coated on surface 14 prior to the deposition of 31 the ink image thereon by ink-jet assembly lO~ The binder 32 resin acts to improve the fixing of the ink image when the 33 image is transferred to the final substrate. In a prefsrred 34 embodiment of the invention, the polymer binder is chosen to be reactive either with the ink dye and/or with the 36 final substrate so as to improve the adhesion of the image 37 to the substrate and to protect the image. In an 38 alternative embodiment, squeegee roller 24 may be replaced 212~602 W093/07000 ~ 5 PCT/NL9ttO0190 " . , .
l by ~ squeegee blade or other coating pparatus.
2 A large number of material:~ are; uaeS~ul as polymer 3 binders in the present invention, the choice being made on 4 the basis of ~he characteristics of the ink~ the ~ubstrate and the transfer member. Examples of suitable materials are 6 marketed by Monsanto under the trade name Scripset.
7 It will ~e appreciated that the present invention is 8 not limited by the embodiments descri~ed above in 9 conjunction with the drawings. Rather, the invention is limited only by the claims which fo~low:
1~
2g
6 BACXG~OUND OF THE INVENTION
7 Ink- jet and bubble- jet printers are kno~n in the art .
8 In such printers, droplets of hot wax-based lnk or ink in a . 9 water-based solvent are e jected in image ror~ing configuration from a print-head onto a sheet of paper or 11 other substrate. The substrate may be heated so as to f ix 12 the image on the su~strate by evaporation of the water 13 solvent or melting of the waxy ink. However, the images 14 formed by such printers are often blurred somewhat, as a L5 result of the "wicking'l of the ink into the paper, due to 16 flow of the water-based solvent or melted waxy ink.
17 Attempts to correct thls proble~ by increasing the 18 viscosity of the ink have not been particularly successful, 19 since the ink-jet process does not work well with viscous ink.
21 Japanese Patent publicatioll 1 1467S0 describes an ink-2~ jet system in which W curable ink is applied to a glass 23 drum utilizing an ink droplet method. The ink is cured 24 using W light before it is transferred to a final su~strate.
26: SUM~ARY OF THE INVENTION
27~ It is the object of the present invention to pro~ide 8 ink-jet printing apparatus which produces a sharp and 29 un~lurred image on a substrate such as paper using conventional water-based or waxy in~. It is a further 31 object of the present inventi.on to provide multi-color ink-32 jqt printing apparatus in which very precise registration 33 of th~ color images is obtained. The present invention 34 accomplishes these objects by in~erposing an intermediate :.
3S member between the ink-jet head and the substrate, such 36 that the functions of image-formation and image-transfer 37 are separated into two distinct stages.
38 In the first stage, the ink-jet printing head is SU13STITUTE Sl IEET
"~ . ~
2~20602 1 operated in the conventional manner to form the desired 2 image, but instead of the image being formed directly on 3 the substrate, it is ~ormed on the surface of the a intermediate member. In the second stage, the image is transferred from the surface of the intermediate member to 8 _ 1~
2~
~37 ~ c f~ v~ ~ SlJ8STlTUTE SHEET
212~602 W093/07000 - 2 - PCT/NL91/001gO
t~
1 the desired final substrate. Interposing the in~ermedl~te 2 member affords ~he possibility of using conventional water-3 ~ased, non-viscous inks for the initial image formation, 4 and then evaporating a desired amount of the water solvent while the image is still on the intermediate member, prior 6 to final transfer to the substrate. Heating the water-based 7 and waxy inks allows for good transfer with~ut excessive 8 heating of the substrate, reducing power 'requirements of 9 the sy~tem.
Interposing the intermediat~ member also affords the 11 possibility of applying resins or binders onto the image 12 prior to final transfer, thereby enhancing the fixing of 13 the ink image and its adhesion to the substrate.
14 BRI:E~F DE8CRIPI'ION C)F ~IE DR~WI~
The present invention will be better understood and 16 appreciated from the following detailed description taken 17 in conjunction with the accompanying drawings in which:
18 Fig. 1 is a schematic representation of ink-jet 19 printing apparatus in accordance with an embodiment of the invention.
21 Fig. 2 is a schematic representation of ink-jet 22 printing apparatus in accordance with another embodiment of 23 the inYention.
24 D~TAI~ED DESCRIPTION OF PREFERRED ENBODINENT~
Reference is now made to Fig~ 1 which provides a 26 schematic representation of ink-j~t printing apparatus in 27 accordance with ~n embodiment of the present invention.
28 Included in the apparatus of Fig. 1 ~s an electronic 29 imaging control assembly 8 which comprises ~ microprocessor and other standard user operatad hardware and software as 31 are known in the art. Con~rol assembly B is connected to an 32 ink-jet assembly 10 which includes an ink-jet printing 33 head, li~uid ink and other ink-jet apparatus as are known 34 in the art. Slightly spaced from ink-jet assembly 10 is a drum 12 having a surface 14 which may be rigid but which 36 preferably is comprised of a resilient polymeric material.
37 Surface 14 is preferably coated with a non-sticking layer, 38 such as silicone, silicone rubber or teflon which is 2~206~2 , ... .
l abhesive to the ink.
2 When the apparatus is in operation, drum l2 rotates in 3 the direction of arrow ~3, and control assembly 8 is ~ operative to provide appropriate control commands to ink-jet assembly lO so as to caus~ ink-3et assembly lO to eject 6 droplets of ink in the direction of ~urface l4 such that 7 the drops of înk adhere to ~urface 14 in ~ desired image 8 configura ion. In accordance with a preferred embodiment of 9 the invention, surface 14 may be heated by means of an internal heater 16, or by means of a blower (not shown)~
ll Heater 16 is operative to evaporate a substantial portion 12 of the liquid carrier of the ink in ~olvent based inks, so 13 as to prevent '~wicking" of the image when it is transferred l4 to the final substrate, as described below.
After the ink image has been deposited on surface 14, 16 drum 12 continues to rotate and the surface bearing the ink 17 image is brou~ht into contact with a final substrate 18, 18 such as a web or a sheet of paper, which is fed into a nip l9 l9 between drum 12 and an impression roller 20. If surface l4 is slightly resilient, i~pxession roller 20 i5 21 preferably rigid. However, if surface l4 is solid, 22 impression roller 20 should have a slightly resilient 23 surface. It will ~e appreciated that as a re~ult of the 24 application of pressure at nip lg between the two surfaces, the ink image is transferred to final substrate 18 from the ~6 non-stic~ surf~ce l4 as the sub~rate is fed through the 27 nip.
28 The inventor has discovered that the specific 29 configuration of ink-jet printing apparatus described above produces an im~ge on the final substrate superior to that 31 produced by the conventional ink~jet apparatus known in the 32 art. Because the ink image is first produced on surface 14 33 of drum 12 and only then transferred to the final 34 substratel the ink-~et apparatus of the present invention effectively prevents "wicking" of the solvent based liquid 36 ink when the image is transferred to the final substrate.
37 Heating of surface l4 causes a substantial portion of the 3% liquid solvent to be evaporated prior to final transfer, ) 21~0602 l such that a very clean, concentrated image is transferred.
2 As a conse~uence, it is also unnecessary to heat the final 3 substrate so as to ~ix and dry the image after transfer 4 thereto.
It will also be appreciated that the apparatus of the 6 present inven~ion af~ords not only single color printing of 7 images but al~o multi~color printing of images. For multi 8 color image printing, ink-jet assembly lO~includes several 9 ink-jet sub-ascemblies, one for each of the process colors as is known in the art, and each such sub-assembly is 11 connected to control assembly ~. As drum l2 rotates, each 12 of the sub assemblies is operative to deposit an image of a 13 single color on surface 14. The use of drum 12 as an 14 intermediate member facilitates a much more precise registration of the colored images than direct printing on 16 paper, thereby providing a significantly sharper color 17 image on the final substrate.
18 Reference is now made to Fig. 2 which shows ink-jet l9 printing apparatus in accordance with another embodiment of the present invention. The apparatus of Fig. 2 is similar 2l to that of Fig. l except t~at upstream of ink-jet assembly 22 lO there is provided a squeegee roller 24 which engages 23 surface l4 of drum 12. In a spacP 26, between squeegee 24 roller 24 and drum 12, is a quantity of a binder resin, preferably a polymeric binder with or without solvent. The 26 binder resin in space 26 is rep~enished by a dispenser 27 assembly 28. S~ueegee roller 24 rotates in the direction 28 opposite that of drum 12~ as shown by arrow 25, and is 29 operative to cause a controlled thin layer of the binder resin to ~e coated on surface 14 prior to the deposition of 31 the ink image thereon by ink-jet assembly lO~ The binder 32 resin acts to improve the fixing of the ink image when the 33 image is transferred to the final substrate. In a prefsrred 34 embodiment of the invention, the polymer binder is chosen to be reactive either with the ink dye and/or with the 36 final substrate so as to improve the adhesion of the image 37 to the substrate and to protect the image. In an 38 alternative embodiment, squeegee roller 24 may be replaced 212~602 W093/07000 ~ 5 PCT/NL9ttO0190 " . , .
l by ~ squeegee blade or other coating pparatus.
2 A large number of material:~ are; uaeS~ul as polymer 3 binders in the present invention, the choice being made on 4 the basis of ~he characteristics of the ink~ the ~ubstrate and the transfer member. Examples of suitable materials are 6 marketed by Monsanto under the trade name Scripset.
7 It will ~e appreciated that the present invention is 8 not limited by the embodiments descri~ed above in 9 conjunction with the drawings. Rather, the invention is limited only by the claims which fo~low:
1~
2g
Claims (12)
1. Apparatus for printing an image on a substrate, the apparatus comprising:
a moving member;
jet means for producing an ink image on the surface of the moving member by spraying droplets of ink in an image pattern on the surface of the moving member; and image transfer means for transferring the ink image from the surface of the moving member to the substrate, characterized in that the apparatus comprises:
means for heating the moving member.
a moving member;
jet means for producing an ink image on the surface of the moving member by spraying droplets of ink in an image pattern on the surface of the moving member; and image transfer means for transferring the ink image from the surface of the moving member to the substrate, characterized in that the apparatus comprises:
means for heating the moving member.
2. Apparatus according to claim 1 wherein the apparatus includes a liquid ink comprising a colored dye and a carrier material.
3. Apparatus according to claim 2 wherein the heating means is operative to evaporate a substantial portion of the carrier material.
4. Apparatus according to any of the preceding claims wherein the heating means is a hot-air blower.
5. Apparatus according to any of the preceding claims wherein the moving member has a surface of resilient material.
6. Apparatus according to any of the preceding claims wherein the moving member has a surface adhesive to the ink.
7. Apparatus according to any of the preceding claims wherein the image transfer means includes means for transferring the ink image to the substrate under heat and pressure.
3. Apparatus according to any of the preceding claims and further comprising coating means for depositing a layer of resin on the surface of the moving member prior to the production of an ink image thereon.
9. Apparatus according to claim 8 wherein the coating means comprises a squeegee roller.
10. Apparatus according to claim 8 wherein the coating means comprises a squeegee blade.
11. Apparatus according to any of the preceding claims wherein the jet means comprises an ink-jet apparatus.
12. Apparatus according to any of the preceding claims wherein the jet means comprises a bubble-jet apparatus.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002120602A CA2120602A1 (en) | 1991-10-04 | 1991-10-04 | Ink-jet printer |
| PCT/NL1991/000190 WO1993007000A1 (en) | 1991-10-04 | 1991-10-04 | Ink-jet printer |
| JP3516930A JPH07508226A (en) | 1991-10-04 | 1991-10-04 | inkjet printing machine |
| EP91918087A EP0606203A1 (en) | 1991-10-04 | 1991-10-04 | Ink-jet printer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002120602A CA2120602A1 (en) | 1991-10-04 | 1991-10-04 | Ink-jet printer |
| PCT/NL1991/000190 WO1993007000A1 (en) | 1991-10-04 | 1991-10-04 | Ink-jet printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2120602A1 true CA2120602A1 (en) | 1993-04-15 |
Family
ID=4153311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002120602A Abandoned CA2120602A1 (en) | 1991-10-04 | 1991-10-04 | Ink-jet printer |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0606203A1 (en) |
| JP (1) | JPH07508226A (en) |
| CA (1) | CA2120602A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9284469B2 (en) * | 2014-04-30 | 2016-03-15 | Xerox Corporation | Film-forming hydrophilic polymers for transfix printing process |
-
1991
- 1991-10-04 EP EP91918087A patent/EP0606203A1/en not_active Ceased
- 1991-10-04 CA CA002120602A patent/CA2120602A1/en not_active Abandoned
- 1991-10-04 JP JP3516930A patent/JPH07508226A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0606203A1 (en) | 1994-07-20 |
| JPH07508226A (en) | 1995-09-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19971006 |