WO2000056551A1 - Druckvorrichtung mit einem papiertransport - Google Patents
Druckvorrichtung mit einem papiertransport Download PDFInfo
- Publication number
- WO2000056551A1 WO2000056551A1 PCT/DE2000/000766 DE0000766W WO0056551A1 WO 2000056551 A1 WO2000056551 A1 WO 2000056551A1 DE 0000766 W DE0000766 W DE 0000766W WO 0056551 A1 WO0056551 A1 WO 0056551A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pair
- printing device
- print head
- printing
- recording medium
- Prior art date
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
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/02—Platens
- B41J11/08—Bar or like line-size platens
-
- 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
- B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
- B41J15/04—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
Definitions
- Printing device with a paper transport
- the invention relates to a printing device according to the preamble of claim 1.
- a printing device of the type mentioned is known from DE 23 09 684 AI.
- This describes an electrographic printing device with an electrode comb that extends over the width of the printing line and which comprises a lower part and an upper part pivotably mounted thereon about a pivot axis.
- the electrode comb and a receptacle for a recording medium supply roll are arranged in the lower part and a transport device for a recording medium designed as a pressure roller is arranged in the upper part.
- the electrode comb is spatially assigned to the pressure roller, the individual electrodes being spring-loaded against the pressure roller.
- the printing roller thus forms a platen and in cooperation with the electrodes a recording medium transport device.
- the upper part has two side walls which laterally enclose a recording medium supply roll inserted into the receptacle.
- the known arrangement has the advantage that a record carrier supply roll is particularly easy to insert.
- the arrangement may also be well suited for a printing device which, as a printing head, has an electrode comb which only touches the recording medium in a linear manner.
- a printhead opposite the recording medium is to be used across the surface and at a distance, this arrangement cannot be used.
- WO 91 13765 AI describes a printer which also comprises a lower part and an upper part pivotably mounted thereon about a pivot axis. A print head is arranged in the lower part and a print bar and a receptacle for a recording medium supply roll are arranged in the upper part.
- Two transport roller pairs are provided as the transport device for a recording medium, one of which, seen in the transport direction of the recording medium, is located in front of the pressure bar and is driven at the same time by a second pair of transport rollers which is arranged behind the pressure bar. It is considered disadvantageous that, due to the arrangement of the recording medium supply roll in the upper part of the recording medium, it has to be passed through a slot and around the upper transport roller located in front of the pressure bar and the pressure bar itself. The replacement of a record carrier supply roll is therefore difficult and time-consuming.
- the object of the invention is therefore to develop a printing device of the type mentioned that a printhead can be used which faces the recording medium at a distance and whose printing elements extend at least across the width of a printing line.
- the platen is flat in the printing area of a character or column-specific print head that can be moved in the printing line direction
- the transport device includes one that is parallel to the printing area a pair of transport rollers which can be driven by a motor and a tightening device for the recording medium and seen in the direction of the print line, a parking area for the print head is arranged next to the print area.
- the flat design of the platen ensures that the distance to the recording medium is the same for all printing elements.
- the platen can be a simple support plate in a non-contact printhead, but must be designed as a pressure bar when using a stop print head, a combination described below of a pair of transport rollers arranged on one side of the platen and a tensioning device arranged on the other side ensures this that the record carrier is always taut in the area of the platen.
- the print head is preferably an ink print head which can be moved parallel to the platen in the print line direction and can print one or more print lines simultaneously.
- a good tension of the recording medium in the area of the platen is achieved in that a pair of transport rollers, viewed in the direction of transport of the platen, is arranged behind the platen and a recording medium brake made of a material with a high coefficient of friction is arranged in front of the platen.
- the first pair of transport rollers pulls the recording medium held back by the recording medium brake past the platen.
- the record carrier brake can be made from one resiliently compressible plastic strips with a high coefficient of friction, which are supported on the platen.
- the tension of the recording medium in the area of the platen is achieved by arranging a first pair of transport rollers, seen in the direction of transport of the platen, in front of the platen and a second pair of transport rollers driven at the same time as the first pair of plungers behind the platen. whereby the second pair of transport rollers is driven at a slightly greater peripheral speed than the first pair of transport rollers and has a lower coefficient of friction than this, so that the recording medium feed distance is determined by the first pair of transport rollers.
- the pair of transport rollers or the first and second pair of transport rollers is made up of a spring loaded in the upper part, which engages on the back of the recording medium and a lower part, in the direction of the driven roller , formed on the recording side of the record carrier attacking free-running counter role. Because the driven rollers engage the back of the recording medium, blurring of the still fresh print is avoided. The counter rolls are taken along by the recording medium when it is fed, so they move with it without slipping. This reliably prevents the print from blurring.
- the arrangement of the pivot axis of the upper part at the same height as a center line passing through the first counter roller and the first driven roller or below this ensures that when the upper part is pivoted into its open position, the pair of transport rollers and the tensioning device are opened after a minimal swivel angle has been passed the recording medium is not taken along when swiveling.
- At least one locking lever provided with a claw is pivotably mounted on the lower part and a locking pin is arranged on the side wall of the upper part adjacent to the locking lever.
- the reverse arrangement is of course also possible. It is essential that the two locking elements are complementary to each other.
- a two-leg unlocking lever is pivotally mounted, one leg of which is intended to engage the at least one locking lever in the sense of unlocking the complementary locking elements.
- the at least one locking lever can only be brought into the unlocking position when the print head is in the parking area or in an acceleration area located in front of the printing area, ie outside the printing area. This protects the sensitive mouthpiece of the printhead from unauthorized contact and the operator's hands from contamination when replacing the recording medium supply roll.
- the print head is additionally blocked in the parking area or the acceleration area when the upper part is outside the printing position.
- the counter-roller lying behind the print head in the transport direction i.e. at least the counter-roller of the pair of transport rollers or of the second pair of transport rollers, has a surface structure that cannot be wetted by printing ink and / or consists of a material that cannot be wetted by printing ink.
- FIG. 1 is a schematic side view of a printing device with the upper part closed
- FIG. 2 is a schematic side view of the printing device with the upper part opened
- Fig. 3 shows the printing device in a schematic plan view.
- a printing device is generally designated 10 in FIG. 1. It comprises a lower part 12 with side cheeks 13 and an upper part 14. The latter is held pivotable about a pivot axis 16 on the rear area of the lower part 12, as the arrow A shows.
- an ink print head 18 is slidably mounted in the direction perpendicular to the plane of the drawing on guide rails 19 which are held in the side cheeks 13.
- a first counter roller 22 of a first pair of transport rollers 24, which can be freely rotated on a first shaft 20, and a second counter roller 28 of a second pair of transport rollers 30, which can be freely rotated on a second shaft 26, is arranged above the ink print head 18.
- the two ends of the shafts 20, 26 extending parallel to the direction of displacement of the ink print head 18 are elastically pretensioned in the direction of the upper part 14 by a pressure spring 32 or 34 (only one pressure spring can be seen in each case).
- a first driven roller 38 of the first pair of transport rollers 24 is arranged below the platen 36 and a second driven roller 40 of the second pair of transport rollers 30 is arranged above the ink print head 18.
- the second driven roller 40 are driven by a two common drive motor, not shown, arranged in the lower part 12.
- the second driven roller 40 has a slightly larger circumference than the first driven roller 38.
- the platen 36 and the first and second driven rollers 38, 40 are held in two parallel side walls 42, the platen 36 being slightly towards the printhead 18 protrudes beyond the driven rollers 38, 40 so that a recording carrier 66 fits snugly against it.
- the pivot axis 16 of the upper part 14 is at the same height as one the first counter roller 22 and the center line 25 passing through the first driven roller 38. It can also lie below this.
- a locking pin 44 projects vertically outward from each side wall 42. In the position of the upper part 14 shown in FIG. 1, the locking pin 44 engages in a claw 46 which is incorporated into a flank of a locking lever 50 which can be pivoted about a pivot pin 48. Above the claw 46, the locking lever 50 tapers to an insertion bevel 52 for the locking pin 44. The locking lever 50 is acted upon by the force of a locking spring 54 in the direction of its locking position shown by solid lines.
- a two-leg unlocking lever 56 is pivoted about a second pivot axis 57 passing perpendicularly through the side walls 42. stored in cash.
- the upwardly projecting legs of the unlocking lever 56 are connected to one another by a handle 58, so that the unlocking lever arrangement 56, 58 engages around the upper part 14 in a U-shape.
- the free leg 60 of each locking lever 56 is in its rest position shown with solid lines on the flank of the locking lever 50, into which the claw 46 is also incorporated.
- the unlocking lever 56 By moving the unlocking lever 56 into its unlocking position 56 'shown with dash-dotted lines, its free legs 60 press the locking lever 50 into its unlocking position 50' shown with dash-dot lines, so that the upper part 14 is pivoted into its open position shown in FIG. 2 can.
- the free legs 60 of the unlocking lever 56 come out of engagement with the locking levers 50, which return to their original position under the force of the locking contacts 54.
- the recording carrier supply roll 64 In the opened position of the upper part 14, the recording carrier supply roll 64 can be inserted into the receiving trough 62 and the recording medium 66 can be placed on the driven rolls 38, 40.
- the locking pins 44 slide along the lead-in chamfers 52 until they snap into the claws 46.
- the record carrier 66 is clamped in the drive roller pairs 24, 30. If the drive motor is briefly energized, the recording medium 66 in front of the platen 36 is additionally tightened and the printer 10 is ready for printing.
- the area between the side cheeks 13 is divided into three sections: an acceleration area 68, a pressure area 70 and a parking area 72.
- the thrust bearing 36 extends over the entire pressure area 70 3
- a parking area 74 is arranged to the right of the printing area 70, which includes a cover cap 76 and a wiper lip 78 to prevent the ink print head 18 from drying out.
- the docking station 74 can also additionally comprise a suction device for cleaning the ink nozzles of the ink print head 18. Docking stations for ink printers are generally known. A detailed description of their structure and mode of action is therefore unnecessary.
- the acceleration range 68 is required if printing is to take place in both transport directions of the ink print head 18 and with a constant print quality. If the ink print head 18 starts from the left side cheek 13 in FIG. 3, it has already reached its desired speed when it enters the print area 70.
- a first leg 80 of a blocking lever 82 which is acted upon by the force of a third pressure spring 86 in the direction of the upper part 14, projects into the displacement path of the ink print head 18.
- a second Leg 84 of the blocking lever 82 engages behind the locking lever 50 shown on the right, so that it is blocked and the upper part 14 cannot be pivoted out of its pressure position.
- the blocking position of the blocking lever 82 is shown in broken lines. However, if the ink print head 18 is brought into its parking position shown in FIG. 3, it moves the blocking lever 82 to the right into its release position shown with solid lines, the right locking lever 50 is released and the upper part 14 can be pivoted out of the printing position.
- a print head locking lever 88 is also mounted such that it can be moved in height. This has a first leg 90 which projects into the displacement path of the ink print head 18. A second leg 92 of the printhead locking lever 88 protrudes into the pivoting path of the upper part 14.
- the printhead locking lever 88 is between a locking position with its first leg 90 projecting into the displacement path of the ink printhead 18 (shown in dash-dot lines in FIG. 1) and one of the displacement path releasing position (shown in Fig. 1 with solid lines) adjustable. It is biased towards its blocking position with the force of a fourth pressure spring 94.
- the print head locking lever 88 is arranged with respect to the displacement path of the ink print head 18 such that the latter can be held in the park position. As long as the upper part 14 is in its printing position, the print head locking lever 88 is held in its release position and the ink print head 18 can be moved as desired. If the upper part 14 is pivoted out of the pressure position, the print head locking lever 88 is driven into its locked position by the fourth pressure spring 94.
- the blocking lever 82 and the printhead locking lever 88 cooperate in such a way that on the one hand the upper part 14 can only be brought out of its printing position when the ink printhead 18 is in the parking area 72, and on the other hand the ink printhead 18 can only be moved out of the parking area 72 when the upper part 14 is in its pressure position. Reliable protection of the ink print head 18 against accidental contact is thereby achieved.
Landscapes
- Ink Jet (AREA)
- Common Mechanisms (AREA)
- Handling Of Sheets (AREA)
- Handling Of Continuous Sheets Of Paper (AREA)
- Advancing Webs (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000606429A JP2002539975A (ja) | 1999-03-18 | 2000-03-11 | 紙搬送手段を有する印刷装置 |
EP00920377A EP1161346B1 (de) | 1999-03-18 | 2000-03-11 | Druckvorrichtung mit einem papiertransport |
DE50002534T DE50002534D1 (de) | 1999-03-18 | 2000-03-11 | Druckvorrichtung mit einem papiertransport |
US09/913,989 US6637959B1 (en) | 1999-03-18 | 2000-03-11 | Printing device with means for conveying paper |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19912255 | 1999-03-18 | ||
DE19912255.5 | 1999-03-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000056551A1 true WO2000056551A1 (de) | 2000-09-28 |
Family
ID=7901542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2000/000766 WO2000056551A1 (de) | 1999-03-18 | 2000-03-11 | Druckvorrichtung mit einem papiertransport |
Country Status (5)
Country | Link |
---|---|
US (1) | US6637959B1 (de) |
EP (1) | EP1161346B1 (de) |
JP (1) | JP2002539975A (de) |
DE (1) | DE50002534D1 (de) |
WO (1) | WO2000056551A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6979080B2 (en) * | 2001-08-29 | 2005-12-27 | Brother Kogyo Kabushiki Kaisha | Printer having improved recording medium feeding mechanism |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2309684A1 (de) | 1973-02-27 | 1974-09-05 | Olympia Werke Ag | Elektrographische druckvorrichtung mit mehreren elektroden |
WO1991013765A1 (de) | 1990-03-16 | 1991-09-19 | Siemens Nixdorf Informationssysteme Aktiengesellschaft | Drucker mit einem in der druckträgerebene geteilten druckergehäuse |
US5668581A (en) * | 1993-10-27 | 1997-09-16 | Mita Industrial Co., Ltd. | Ink jet printing apparatus |
US5800076A (en) * | 1996-09-26 | 1998-09-01 | Brother Kogyo Kabushiki Kaisha | Printer having guide plate extending to printhead |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4929099A (en) * | 1988-01-19 | 1990-05-29 | Qume Corporation | Multi-line serial printer |
MY108211A (en) | 1991-02-28 | 1996-08-30 | Canon Kk | Information processing apparatus |
JP3019877B2 (ja) | 1991-06-13 | 2000-03-13 | セイコーエプソン株式会社 | インクジェットプリンタの印字機構 |
US5993093A (en) * | 1997-11-04 | 1999-11-30 | Schoennauer; Larry Joseph | Printer |
US6004053A (en) * | 1998-09-11 | 1999-12-21 | Comtec Informationsystems, Inc. | Printer apparatus |
ES2195833T3 (es) * | 1999-12-15 | 2003-12-16 | Seiko Epson Corp | Impresora. |
-
2000
- 2000-03-11 WO PCT/DE2000/000766 patent/WO2000056551A1/de active IP Right Grant
- 2000-03-11 JP JP2000606429A patent/JP2002539975A/ja active Pending
- 2000-03-11 DE DE50002534T patent/DE50002534D1/de not_active Expired - Lifetime
- 2000-03-11 EP EP00920377A patent/EP1161346B1/de not_active Expired - Lifetime
- 2000-03-11 US US09/913,989 patent/US6637959B1/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2309684A1 (de) | 1973-02-27 | 1974-09-05 | Olympia Werke Ag | Elektrographische druckvorrichtung mit mehreren elektroden |
WO1991013765A1 (de) | 1990-03-16 | 1991-09-19 | Siemens Nixdorf Informationssysteme Aktiengesellschaft | Drucker mit einem in der druckträgerebene geteilten druckergehäuse |
US5668581A (en) * | 1993-10-27 | 1997-09-16 | Mita Industrial Co., Ltd. | Ink jet printing apparatus |
US5800076A (en) * | 1996-09-26 | 1998-09-01 | Brother Kogyo Kabushiki Kaisha | Printer having guide plate extending to printhead |
Also Published As
Publication number | Publication date |
---|---|
JP2002539975A (ja) | 2002-11-26 |
EP1161346A1 (de) | 2001-12-12 |
US6637959B1 (en) | 2003-10-28 |
EP1161346B1 (de) | 2003-06-11 |
DE50002534D1 (de) | 2003-07-17 |
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