EP0178886A2 - Ink jet apparatus and method of operating the same - Google Patents
Ink jet apparatus and method of operating the same Download PDFInfo
- Publication number
- EP0178886A2 EP0178886A2 EP85307376A EP85307376A EP0178886A2 EP 0178886 A2 EP0178886 A2 EP 0178886A2 EP 85307376 A EP85307376 A EP 85307376A EP 85307376 A EP85307376 A EP 85307376A EP 0178886 A2 EP0178886 A2 EP 0178886A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- ink
- solid state
- ink jet
- reservoir
- head
- 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.)
- Granted
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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
- 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
- B41J2/17—Ink jet characterised by ink handling
- B41J2/195—Ink jet characterised by ink handling for monitoring ink quality
-
- 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
- B41J2/17—Ink jet characterised by ink handling
- B41J2/175—Ink supply systems ; Circuit parts therefor
- B41J2/17593—Supplying ink in a solid state
Definitions
- This invention relates to an ink jet wherein the ink within the jet is of the phase change type which may be referred to as hot melt ink.
- phase change or hot melt ink of the type utilized in an ink jet is characteristically solid at room temperature. When heated, the ink will melt to a consistency so as to be jettable.
- the hot melt ink may be jetted from a variety of apparatus.
- the delivery of ink is, of course, dictated by the liquid state.
- the ink is contained within a closed vessel of some sort prior to delivery to the ink jet.
- the delivery of the ink requires different solutions in order to provide a reliable supply and minimize operator intervention.
- melt-on-demand system for supplying ink" to a reservoir carried by an ink jet in an imaging head is disclosed, extended cooking of the ink is avoided as well as the resulting degradation of ink.
- the amount of ink which may be utilized in such a system is limited by the amount of ink which may be carried on imaging head.
- At least some embodiments of this invention can provide a hot melt ink delivery system in which operator handling of the ink is minimized, an ink may be reliably supplied to the ink jet apparatus, extended heating and resulting degradation of the ink are minimised, and a large supply of ink is provided without requiring operator invention.
- ink in solid state form is stored at a fixed location and a movable imaging head comprises at least one ink jet and an associated reservoir.
- the imaging head is moved to a filling position adjacent to the fixed location where the ink is stored and the solid state ink is melted to a liquid state form to fill the reservoir of the imaging head.
- the moving of the head to a filling position, melting and the filling of the reservoir may be repeated on demand whenever ink is needed.
- the solid state ink comprises a block of ink with a heating means in thermal communication with an extremity of the block.
- the block is advanced so as to be maintained in thermal communication with the heating means which is energized on demand when ink is required.
- an ink jet apparatus including a head 10 mounted for movement along a scanning path depicted by arrows 12 and 14.
- the head 10 includes ink jet imaging systems supplying an array of ink jets having orifices 16.
- the head 10 includes an on-board reservoir 18 supplied by a trough 20 located at the rear of the head 10.
- the reservoir 18 is of a limited capacity.
- the reservoir 18 is capable of storing a volume of ink which is heated by a heater not shown so as to assure the operation of the ink jets for a reasonable period of time for a reasonable rate of, printing.
- the volume of ink is limited.
- the head 10 is capable of movement to a refill position shown in phantom.
- the head 10 In the refill position, the head 10 is located below a supply of ink in solid state form which is capable of being converted to a melted state by heating.
- the supply comprises a tubular housing 22 with a heater 24 electrically supplied by leads 26 and 28.
- the trough 20 when positioned adjacent to the supply of ink in tubular housing 22 is properly positioned so that melted ink may flow into the trough 20 along a path 30. In this manner, the reservoir 18 within the head 10 may be filled.
- the reservoir 18 and the head 10 are moved back into the scanning position away from the supply of hot melt ink. Periodically, it is necessary to move the head 10 back to the refill position shown in phantom in Fig. 1 so as to permit subsequent sequential melting of the hot melt ink within the tubular housing 22. It will therefore be appreciated that the volume of ink within the housing 22 when the supply is full substantially exceeds that volume of ink which is contained within the reservoir 18 of the head 10 at any given time.
- the tubular housing 22 is shown as housing a helical spring 32 which abuts a fixed member 34 secured to the housing 22 by screw 36.
- the other end of the spring 32 abuts a movable insert 38 which is in contact with one extremity of a block of ink 40 in solid state form.
- the other end of the block 40 abuts a groove 42 juxtaposed to the heater 24 which is enclosed within a housing 44 held in place by a screw 46.
- the groove 42 allows ink to flow into the opening 50.
- the housing 44 includes a thermistor 48 or other temperature sensing element.
- the housing 22 includes apertures 52 and 54 associated with a light source 56 and a light detector 58.
- the resulting signal generated by the detector indicates an adequate quantity of ink 40.
- the detector 58 will indicate a low supply. This will be more fully described in connection with Fig. 3.
- a heater control 60 energizes and de-energizes the heater 24.
- the heater control 60 is responsive to a signal from .the thermistor 48.
- the heater 24 is energized for a predetermined length of time whenever a refill of ink is called for in the reservoir 18.
- This predetermined length of time is under the control of a timer 62 which supplies an input to the heater control. It is, of course, important to only set the timer to initiates heating when ink is called for in the reservoir 18. This is determined by a level detect circuit 64 which receives a suitable level indicating signal from the reservoir. However, the timer 62 can only be set when the detector 58 indicates an adequate supply of ink 40 as shown in Fig. 2.
- a position sensor 66 enables the heater control when the head 10 is in proper position.
- the heater plate 42 it is possible to eliminate the heater plate 42 and utilize a supply of solid state ink which contains a heater element extending throughout the length of the ink. Where such an ink supply is utilized, the spring 62 for advancing the ink may be eliminated. On the other hand, where a heater plate is utilized, it may be desirable to provide means other than the spring 32 to advance the ink. It will also be appreciated that it may be desirable to provide for separability between the housing 22 and the heater housing 44 as well as the optical detecting system including the light source 56 and the light detector 58. It will also be appreciated that the housing 22 may be rotated 90° for topographical purposes.
Abstract
Description
- This invention relates to an ink jet wherein the ink within the jet is of the phase change type which may be referred to as hot melt ink.
- The phase change or hot melt ink of the type utilized in an ink jet is characteristically solid at room temperature. When heated, the ink will melt to a consistency so as to be jettable. The hot melt ink may be jetted from a variety of apparatus.
- When employing ink in a liquid state, the delivery of ink is, of course, dictated by the liquid state. Typically, the ink is contained within a closed vessel of some sort prior to delivery to the ink jet. When employing hot melt ink, the delivery of the ink requires different solutions in order to provide a reliable supply and minimize operator intervention. At the same time, it is undesirable to heat an entire supply of hot melt ink at all times since the extended cooking of the hot melt ink may result in degradation of the ink.
- In a melt-on-demand system for supplying ink" to a reservoir carried by an ink jet in an imaging head is disclosed, extended cooking of the ink is avoided as well as the resulting degradation of ink. The amount of ink which may be utilized in such a system is limited by the amount of ink which may be carried on imaging head.
- According to the invention from one aspect there is provided a method of operating an ink jet apparatus characterized by the following steps:
- storing ink in solid state form at a fixed location;
- scanning at least one ink jet and an associated reservoir;
- periodically moving said.ink jet(s) and associated reservoir to a refill position adjacent said fixed location on demand;
- melting solid state ink at said fixed location; and
- directly filling said reservoir with said melted ink.
- According to the invention from another aspect there is provided ink jet apparatus characterized by:
- a scanning ink jet head including an ink reservoir and at least one ink droplet ejecting jet;
- a fixed solid state ink supply;
- means for periodically moving said ink jet head to a refill position adjacent said ink supply; and
- means for heating and melting said solid state ink and flowing said melted ink directly into said reservoir when said head is in said refill position.
- It will be appreciated that at least some embodiments of this invention can provide a hot melt ink delivery system in which operator handling of the ink is minimized, an ink may be reliably supplied to the ink jet apparatus, extended heating and resulting degradation of the ink are minimised, and a large supply of ink is provided without requiring operator invention.
- Accordingly, in putting the present invention into effect, ink in solid state form is stored at a fixed location and a movable imaging head comprises at least one ink jet and an associated reservoir. The imaging head is moved to a filling position adjacent to the fixed location where the ink is stored and the solid state ink is melted to a liquid state form to fill the reservoir of the imaging head. The moving of the head to a filling position, melting and the filling of the reservoir may be repeated on demand whenever ink is needed.
- In a preferred embodiment of the invention, the solid state ink comprises a block of ink with a heating means in thermal communication with an extremity of the block. The block is advanced so as to be maintained in thermal communication with the heating means which is energized on demand when ink is required.
- For a better understanding of the invention and to show how the same may be carried into effect, reference will now be made, by,, way of example, to the accompanying drawings, wherein:-
- Fig. 1 is a perspective view of an ink jet apparatus representing a preferred embodiment of the invention;
- Fig. 2 is a sectional view of the ink supply of Fig. 1; and
- Fig. 3 is a block diagram of control apparatus for the apparatus shown in Fig. 1.
- Referring to Fig. 1, an ink jet apparatus is disclosed including a
head 10 mounted for movement along a scanning path depicted byarrows head 10 includes ink jet imaging systems supplying an array of inkjets having orifices 16. Thehead 10 includes an on-board reservoir 18 supplied by atrough 20 located at the rear of thehead 10. - The
reservoir 18 is of a limited capacity. In other words, thereservoir 18 is capable of storing a volume of ink which is heated by a heater not shown so as to assure the operation of the ink jets for a reasonable period of time for a reasonable rate of, printing. However, the volume of ink is limited. - In order to supply further ink to the
reservoir 18 of thehead 10 to thereservoir 20, thehead 10 is capable of movement to a refill position shown in phantom. In the refill position, thehead 10 is located below a supply of ink in solid state form which is capable of being converted to a melted state by heating. As shown, the supply comprises atubular housing 22 with aheater 24 electrically supplied byleads trough 20 when positioned adjacent to the supply of ink intubular housing 22 is properly positioned so that melted ink may flow into thetrough 20 along apath 30. In this manner, thereservoir 18 within thehead 10 may be filled. - Once filled, the
reservoir 18 and thehead 10 are moved back into the scanning position away from the supply of hot melt ink. Periodically, it is necessary to move thehead 10 back to the refill position shown in phantom in Fig. 1 so as to permit subsequent sequential melting of the hot melt ink within thetubular housing 22. It will therefore be appreciated that the volume of ink within thehousing 22 when the supply is full substantially exceeds that volume of ink which is contained within thereservoir 18 of thehead 10 at any given time. - Referring now to Fig. 2, the
tubular housing 22 is shown as housing ahelical spring 32 which abuts a fixedmember 34 secured to thehousing 22 byscrew 36. The other end of thespring 32 abuts a movable insert 38 which is in contact with one extremity of a block ofink 40 in solid state form. The other end of theblock 40 abuts agroove 42 juxtaposed to theheater 24 which is enclosed within ahousing 44 held in place by ascrew 46. Thegroove 42 allows ink to flow into the opening 50. Thehousing 44 includes a thermistor 48 or other temperature sensing element. - As the
heater 24 is elevated in temperature, the extremity of theblock 40 abutting theplate 42 will melt. The melted ink then flows through thegroove 42 and into theaperture 50 in thetubular housing 22. It is flow from theaperture 50 which creates the flow of meltedink 30 shown in Fig. 1. - As also shown in Fig. 2, the
housing 22 includesapertures light source 56 and alight detector 58. When a sufficient quantity ofink 40 is present to block the light from thesource 56 from being detected by thedetector 58, the resulting signal generated by the detector indicates an adequate quantity ofink 40. However, when the quantity ofink 40 is no longer capable of blocking thedetector 58, thedetector 58 will indicate a low supply. This will be more fully described in connection with Fig. 3. - Referring now to Fig. 3, a
heater control 60 energizes and de-energizes theheater 24. In order to control the temperature of theheater 24, theheater control 60 is responsive to a signal from .the thermistor 48. - Preferably, the
heater 24 is energized for a predetermined length of time whenever a refill of ink is called for in thereservoir 18. This predetermined length of time is under the control of atimer 62 which supplies an input to the heater control. It is, of course, important to only set the timer to initiates heating when ink is called for in thereservoir 18. This is determined by alevel detect circuit 64 which receives a suitable level indicating signal from the reservoir. However, thetimer 62 can only be set when thedetector 58 indicates an adequate supply ofink 40 as shown in Fig. 2. - For this invention, it is important that the melting only be initiated when the
head 10 is in the proper position beneath thetubular housing 22. For this purpose, aposition sensor 66 enables the heater control when thehead 10 is in proper position. - Although a preferred embodiment of the invention has been shown and described, it will be understood that other embodiments and modifications will fall within the scope of the invention as set forth in the appended claims. For example, it is possible to eliminate the
heater plate 42 and utilize a supply of solid state ink which contains a heater element extending throughout the length of the ink. Where such an ink supply is utilized, thespring 62 for advancing the ink may be eliminated. On the other hand, where a heater plate is utilized, it may be desirable to provide means other than thespring 32 to advance the ink. It will also be appreciated that it may be desirable to provide for separability between thehousing 22 and theheater housing 44 as well as the optical detecting system including thelight source 56 and thelight detector 58. It will also be appreciated that thehousing 22 may be rotated 90° for topographical purposes.
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US66170184A | 1984-10-16 | 1984-10-16 | |
US661701 | 1984-10-16 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0178886A2 true EP0178886A2 (en) | 1986-04-23 |
EP0178886A3 EP0178886A3 (en) | 1986-12-10 |
EP0178886B1 EP0178886B1 (en) | 1989-05-24 |
Family
ID=24654738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85307376A Expired EP0178886B1 (en) | 1984-10-16 | 1985-10-14 | Ink jet apparatus and method of operating the same |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0178886B1 (en) |
JP (2) | JPS61192559A (en) |
CA (1) | CA1252669A (en) |
DE (1) | DE3570397D1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2203994A (en) * | 1987-03-31 | 1988-11-02 | Canon Kk | Liquid-repellent application process for use with ink drop printers |
EP0338590A2 (en) * | 1988-04-22 | 1989-10-25 | Seiko Epson Corporation | Ink jet type recording apparatus and method |
US5223860A (en) * | 1991-06-17 | 1993-06-29 | Tektronix, Inc. | Apparatus for supplying phase change ink to an ink jet printer |
WO1998030393A1 (en) * | 1997-01-09 | 1998-07-16 | Domino Printing Sciences Plc | Ink cartridge for an ink jet printer |
EP0780233A3 (en) * | 1995-11-24 | 1998-09-23 | Brother Kogyo Kabushiki Kaisha | Ink jet recording device with AC and DC heaters selectively used for hot melt ink |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7147313B2 (en) * | 2003-12-30 | 2006-12-12 | Xerox Corporation | Real time detection of ink stick jams in phasing printing systems |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2459744A1 (en) * | 1973-12-28 | 1975-07-03 | Facit Ab | ARRANGEMENT FOR SUPPLYING AND STORING COLOR LIQUID IN A COLOR JET RECORDER |
US4178595A (en) * | 1977-11-04 | 1979-12-11 | Ricoh Company, Ltd. | Ink jet printing apparatus with ink replenishing |
EP0097823A2 (en) * | 1982-06-30 | 1984-01-11 | International Business Machines Corporation | Ink jet recording system |
EP0178885A2 (en) * | 1984-10-15 | 1986-04-23 | Dataproducts Corporation | Ink jet apparatus and method of operating the same |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5662166A (en) * | 1979-10-29 | 1981-05-27 | Fuji Xerox Co Ltd | Thermosensitive recording device |
JPS5772873A (en) * | 1980-10-24 | 1982-05-07 | Oki Electric Ind Co Ltd | Color recording apparatus |
JPS6028628Y2 (en) * | 1981-04-30 | 1985-08-30 | 沖電気工業株式会社 | Automatic ink supply mechanism for thermal transfer recording devices |
JPS58208062A (en) * | 1982-05-07 | 1983-12-03 | Yokogawa Hokushin Electric Corp | Ink jet type recording apparatus |
-
1985
- 1985-10-11 CA CA000492904A patent/CA1252669A/en not_active Expired
- 1985-10-14 JP JP22707285A patent/JPS61192559A/en active Granted
- 1985-10-14 DE DE8585307376T patent/DE3570397D1/en not_active Expired
- 1985-10-14 EP EP85307376A patent/EP0178886B1/en not_active Expired
-
1992
- 1992-12-28 JP JP34943192A patent/JPH0691895A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2459744A1 (en) * | 1973-12-28 | 1975-07-03 | Facit Ab | ARRANGEMENT FOR SUPPLYING AND STORING COLOR LIQUID IN A COLOR JET RECORDER |
US4178595A (en) * | 1977-11-04 | 1979-12-11 | Ricoh Company, Ltd. | Ink jet printing apparatus with ink replenishing |
EP0097823A2 (en) * | 1982-06-30 | 1984-01-11 | International Business Machines Corporation | Ink jet recording system |
EP0178885A2 (en) * | 1984-10-15 | 1986-04-23 | Dataproducts Corporation | Ink jet apparatus and method of operating the same |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2203994A (en) * | 1987-03-31 | 1988-11-02 | Canon Kk | Liquid-repellent application process for use with ink drop printers |
US5005024A (en) * | 1987-03-31 | 1991-04-02 | Canon Kabushiki Kaisha | Ink jet recording apparatus which supplies repellent agent to liquid discharge port surface and method thereof |
GB2203994B (en) * | 1987-03-31 | 1991-12-11 | Canon Kk | Liquid injection recording apparatus and liquid-repellent process method used for the apparatus |
US5489928A (en) * | 1987-03-31 | 1996-02-06 | Canon Kabushiki Kaisha | Liquid-repellent application process for a liquid ejection recording apparatus |
EP0338590A2 (en) * | 1988-04-22 | 1989-10-25 | Seiko Epson Corporation | Ink jet type recording apparatus and method |
EP0338590A3 (en) * | 1988-04-22 | 1991-10-02 | Seiko Epson Corporation | Ink jet type recording apparatus and method |
US5341164A (en) * | 1988-04-22 | 1994-08-23 | Seiko Epson Corporation | Solid ink supply for ink jet |
US5223860A (en) * | 1991-06-17 | 1993-06-29 | Tektronix, Inc. | Apparatus for supplying phase change ink to an ink jet printer |
US5442387A (en) * | 1991-06-17 | 1995-08-15 | Tektronix, Inc. | Apparatus for supplying phase change ink to an ink jet printer |
EP0780233A3 (en) * | 1995-11-24 | 1998-09-23 | Brother Kogyo Kabushiki Kaisha | Ink jet recording device with AC and DC heaters selectively used for hot melt ink |
US5992991A (en) * | 1995-11-24 | 1999-11-30 | Brother Kogyo Kabushiki Kaisha | Ink jet recording device with AC and DC heaters selectively used for hot melt ink |
WO1998030393A1 (en) * | 1997-01-09 | 1998-07-16 | Domino Printing Sciences Plc | Ink cartridge for an ink jet printer |
Also Published As
Publication number | Publication date |
---|---|
EP0178886B1 (en) | 1989-05-24 |
JPH0691895A (en) | 1994-04-05 |
JPS61192559A (en) | 1986-08-27 |
CA1252669A (en) | 1989-04-18 |
EP0178886A3 (en) | 1986-12-10 |
JPH0367632B2 (en) | 1991-10-23 |
DE3570397D1 (en) | 1989-06-29 |
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