EP1075391A1 - Economical printing method using an imaging tape and device for implementing said method - Google Patents
Economical printing method using an imaging tape and device for implementing said methodInfo
- Publication number
- EP1075391A1 EP1075391A1 EP99916965A EP99916965A EP1075391A1 EP 1075391 A1 EP1075391 A1 EP 1075391A1 EP 99916965 A EP99916965 A EP 99916965A EP 99916965 A EP99916965 A EP 99916965A EP 1075391 A1 EP1075391 A1 EP 1075391A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ribbon
- printing
- image
- drive
- driven
- 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
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
- B41J35/00—Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms
- B41J35/16—Multicolour arrangements
-
- 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
- B41J17/00—Mechanisms for manipulating page-width impression-transfer material, e.g. carbon paper
- B41J17/02—Feeding mechanisms
- B41J17/12—Special adaptations for ensuring maximum life
-
- 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
- B41J33/00—Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material
- B41J33/14—Ribbon-feed devices or mechanisms
-
- 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
- B41J33/00—Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material
- B41J33/14—Ribbon-feed devices or mechanisms
- B41J33/52—Braking devices therefor
Definitions
- the invention relates to printers such as are found in particular in fax machines.
- the invention relates to printers using a printing ribbon as a printing consumable.
- They may be thermal transfer or sublimation printers, that is to say printers in which the printing is carried out by ink transfer from a ribbon by means of a thermal source, comprising a thermal print head or, for example, mechanical transfer printers comprising a needle print head.
- the printing ribbon used in a roll, comprises a polyethylene support film coated with a layer of hot-melt ink.
- a food roll delivers virgin ribbon which is driven, concomitantly with a printing medium, in front of the thermal printing head provided with heating elements under the activation of which ink is transferred from the ribbon to the medium, then the ribbon is rewound on a take-up roll intended to be thrown away. The ribbon is thus driven from the food roll to the take-up roll, passing in front of the print head.
- Document US 4,616,236 teaches a method for printing images of format less than X / 2 on X format printing media, using a printing ribbon supporting a succession of ink ranges of format X.
- the media and the printing ribbon are concomitantly driven in front of a print head, in the forward direction, and the two media are printed using the two halves of the same ink area, respectively, by driving the ribbon in the return direction between the successive prints of two supports.
- the size of the image to be printed must be less than half the size of the ink pads.
- the present invention first proposes to save printing tape whatever the format of the image to be printed.
- the invention relates to a method for successively printing, by ink transfer, a plurality of images on at least one printing medium using a printing ribbon, method during which, for the printing of each image, the ribbon and the support are simultaneously driven in front of a print head in a forward direction, and between two successive image prints, the ribbon is driven, in the return direction, along a displacement such that the next image is printed using at least one remaining printing area of a portion of ribbon previously used, a method characterized by the fact, in the case where a plurality of supports is printed printing by shifting by a given spatial interval the lower edge of each of the supports from the upper edge of the following support, the ribbon is driven in the return direction, between the successive prints of support, along a displacement at least equal said spatial interval .
- ink transfer is meant both thermal transfer stricto sensu and sublimation, that is to say any process of ink transfer by a thermal source of a printing ribbon on a support printing.
- the ribbon is unwound from a food roll and it is rewound on a take-up roll, and between two successive prints, it is unwound from the take-up roll and it is rewound on the food roll.
- the invention also relates to a device for successively printing, by ink transfer, a plurality of images on at least one printing medium using a printing ribbon, for implementing the method according to one of claims 1 to 7, comprising a housing for receiving a food roll of printing ribbon, a housing for receiving a printing ribbon receiving roll, a printing head, means for ribbon drive arranged to drive the ribbon, in a forward direction, from the food roller to the take-up roller passing in front of the print head, means for driving the support arranged to drive the support in the forward direction in front of the print head, and means arranged to drive the ribbon in the return direction, device characterized in that it comprises a single motor for driving the ribbon in the forward direction and backward.
- FIG. 1 shows a schematic side view of a gear system of the printer for driving the printing ribbon and a printing medium, according to the particular embodiment
- FIG. 2 shows a block diagram of the printer, according to the particular embodiment
- FIG. 3 represents a top view of a portion of printing ribbon, according to the particular embodiment.
- FIG. 4 represents a top view of a portion of used tape from FIG. 3.
- the printer belongs to a fax machine.
- This is a thermal transfer printer comprising a thermal printing head 1, a housing for receiving a ribbon food roll, a housing for receiving a ribbon receiving roller, a magazine 5 input of print media to be printed, in this case reamed sheets of paper, an output magazine for the sheets after printing, a peeling edge 4 and a mechanism 7 for driving the printing ribbon 10 and a print support sheet.
- the two rollers, food and receiver are supported by two respective axes 2 and 3 which are both mounted free in rotation.
- a pinion 38 and a pinion 39 are fixed respectively on the axis 2 and on the axis 3.
- a pinion 28 integral and coaxial.
- the printing ribbon 10 (FIG. 3) comprises a polyethylene film 11 supporting a printing layer 12 here comprising a plurality of areas of hot-melt ink 12a, 12b, 12c of cyan, magenta, yellow and black colors, arranged the next to each other in the lengthwise direction of the ribbon 10.
- the film 11 also supports a marking area 13 located along the longitudinal edge of the ribbon 10, in the vicinity of the printing layer 12, and containing a plurality of positioning indications, here black bars, placed side by side along the edge of the ribbon 10, at regular intervals.
- the drive mechanism 7 is arranged, when printing an image on a support sheet for:
- the drive mechanism 7 is also intended to drive the printing ribbon 10 in the return direction in front of the thermal head 1, delivering it from the take-up roll and rewinding it on the food roll, as will be explained below.
- the forward direction of a pinion, a roller or any other rotary element of the printer is the direction of rotation of this element corresponding to the direction in which the ribbon is driven from the food roller to the take-up roller and / or in the direction in which a sheet is drawn from the input magazine 5 to the output magazine 6.
- the return direction is of course the opposite direction to this forward direction.
- the mechanism 7 comprises a single motor 18 for driving in rotation a motor shaft 19, in the forward and reverse directions, and a gear system for driving the ribbon 10 and a sheet of printing support. .
- the gear system notably comprises, for the drive of the ribbon 10 in the forward direction, a pinion 33 mounted in free wheel.
- the pinion 33 meshes, via a differential, with the pinion 39 of the axis 3 support of the take-up roller and is arranged to be driven in rotation in the forward direction by the shaft of the motor 19, by means of a set of drive gears not shown.
- the take-up roller Under the action of the drive in rotation in the forward direction of the motor shaft 19, the take-up roller is thus intended to be driven in rotation in the forward direction, by means of the set of pinions, intermediate, of the pinion 33 and pinion 39.
- the gear system For driving the ribbon 10 in the return direction, the gear system comprises two pinions 29 and 32 integral and coaxial.
- the pinion 32 mounted freewheeling, meshes with the pinion 38 of the axis 2 support of the food roller and the pinion 29 meshes with the pinion 28 itself engaged a pinion 23.
- the latter mounted free in rotation, is meshed with a pinion 34 arranged to be driven in rotation by the drive shaft 19, by means of the set of drive pinions not shown.
- the pinion 34 and the pinion 33 are coaxial.
- the food roller is intended to be driven in rotation in the return direction, under the action of the rotary drive of the motor shaft 19 in the return direction, by means of the gear chain comprising the intermediate pinion set and pinions 34, 23, 28, 29, 32 and 38, as will be explained below.
- the gear system For driving a printing sheet, the gear system comprises an axis 24 for loading the sheet, adjacent to the input magazine 5, and an axis 25 for ejecting the sheet, adjacent to the magazine for outlet 6.
- the axis 24 and the axis 25 respectively support loading rollers and ejection rollers.
- a pinion 40 and two coaxial and integral pinions 41, 35 are respectively fixed on the loading axis 24 and on the ejection axis 25.
- the two pinions 41 and 40 are meshed with a pinion 26.
- the drive pinion 23 is thus arranged to drive the support axis 25 of the ejection roller in the forward direction, by means of the pinion 35, and, under the action of the rotation drive of the pinion 41, the pinion 26 is intended to be driven in rotation and itself to rotate in the forward direction the axis 24 supporting the loading rollers, by means of the pinion 40.
- the axis 25 of the ejection roller is mounted freewheeling so that it cannot be driven in rotation only in the forward direction corresponding to the direction of ejection, which avoids any risk of inappropriate loading of a sheet by the outlet magazine 6.
- Two non-return systems 30, 31 are mounted respectively on the pinion 38 of the axis 2 of the food roller and on the pinion 39 of the axis 3 of the receiving roller.
- the non-return system 30 of the food roller is intended to apply a resistant torque to the pinion 38 when the latter is rotated in the forward direction.
- the non-return system 31 of the take-up roller is designed to apply a resistant torque to the pinion 39 when the latter is driven in the return direction. Thanks to this, the ribbon is always tensioned when it is driven in the forward direction or in the reverse direction.
- the printer further comprises a memory 14 for storing pages of received fax images, a block 15 for digital analysis of the fax images stored in the form of data in the memory 14, a sensor 16 for detecting carrier sheets of printing, a sensor 17 for detecting indications of positioning of the printing ribbon 10 and a control block 21, in this case a microprocessor, to which all the electrical and electronic elements of the printer (head 1, sensors 16 -17, block 15, motor, etc.) are connected.
- the thermal head 1 is here arranged to print the images line by line.
- the “thermal line 1” of the thermal head 1 is called the virtual line 8 along which the thermal head 1 prints the successive lines of an image on a print sheet moving past it.
- the sensor 16 is intended to detect the presence of a sheet to be printed passing through the printing line 8.
- the sensor 17 is intended to detect the indications of positioning of the printing ribbon 10 when the latter passes through the printing line 8.
- the digital analysis block 3 comprises application software designed to: - examine the lines making up the image pages stored in the memory
- image line and "empty image line” are intended to denote respectively a line containing, in whole or in part, image points and a line without image points.
- a "previously used portion of ribbon” means a portion of the ribbon 10 passed in front of the print head 1, in the forward direction, in other words after a printing pass.
- the printer further comprises a man-machine interface 20 comprising an input keyboard and a display screen.
- the input keyboard comprises an economic printing key intended for controlling the printing in economic mode of the images contained in the memory 14, as well as a normal printing key for printing in normal mode.
- the images to be printed which are here image pages, are stored in the form of data in the memory 14.
- the motor shaft 19 is rotated in the forward direction by the motor 18 and drives the pinion 33, by means of the set of intermediate gears previously mentioned.
- the pinion 33 itself rotates the axis 3 of the take-up roller, and consequently the take-up roller itself, in the forward direction, via the pinion 39.
- the pinion 23 Under the action of the drive of the motor shaft 19, the pinion 23 is rotated in the forward direction, via the set of pinions and the pinion 34.
- the pinion 23 rotates, in the forward direction, the writing roller 27, by means of its pinion 28, as well as the pinion 41 by means of the pinion 35.
- the pinion 41 drives in rotation the pinion 26 which itself drives the pinion 40 of the axis 24 of the loading roller, in the forward direction.
- the ejection roller 25 and the loading roller 24 are thus rotated in the direction of ejection and in the direction of loading respectively.
- the food roller is in turn driven in rotation by the tensile force exerted by the tape 10.
- the non-return system 30 applies a resistant torque to the pinion 38 of the axis 2 of the food roller, so that the rotation food roller is braked.
- the food roller thus rotates more slowly than the receiving roller and, thanks to this, the ribbon 10 stretches.
- a print sheet 100 is driven in the forward direction from the input magazine 5 to the output magazine 6, passing in front of the thermal head 1 and, concomitantly, under the action of the rotation of the take-up roller and the food roll, the ribbon 10 is driven in the forward direction from the food roll, from which it is unwound, to the take-up roller, on which it is wound, passing in front of the thermal head 1.
- the sheet 100 and the ribbon 10, concomitantly driven in front of the thermal head 1, are pressed against it by the writing roller 27 and, under the activation of the heating elements of the head 1, ink is transferred from the ribbon 10 on sheet 100 and the image page is thus printed, line by line, on sheet 100.
- the analysis block 15 examines the image pages contained in the memory 14 in the form of data.
- the block 15, For the printing of each of the successive image pages to be printed, the block 15, under the control of the control block 21, examines, from top to bottom, the successive lines composing the page to be printed. For each line, block 15 determines whether it is an image line, and therefore if it is a line to be printed in whole or in part, or if it is an empty image line, in order to deduce therefrom if the page to be printed contains an upper zone, an empty image upper band. If necessary, block 15 counts the number of empty image lines composing the upper empty image zone and, each line having a given height, evaluates the height of the upper empty image zone.
- height is meant the dimension in the direction perpendicular to that of the lines making up the image page.
- the analysis block 15, under the control of the control block 21, also examines, from bottom to top, the lines composing the page previous image (that is to say the previously printed page), stored in memory 14. Block 15 determines for each line, whether it is an image line or whether it is an empty image line to deduce if the previous page contains an empty image lower zone. If necessary, block 15 counts the number of empty image lines composing the empty image lower zone and, each line having a given height, evaluates the height of the empty image lower zone.
- the printer drives the two print sheets one after the other in front of the thermal head 1, by shifting them one on the other from an "interpage".
- This is a determined spatial interval from which the lower edge and the upper edge are respectively shifted of two sheets successively driven in front of the thermal head 1 for printing.
- Such interpage consumes an equivalent length of ribbon.
- the block 15 evaluates a rewinding length, that is to say a length of ribbon which should be rewound around the food roll. For this, block 15 adds, if necessary, the height of the interpage between the sheet previously printed and the sheet to be printed, the height of the upper empty image area of the page to be printed and the height of the lower empty image area of the previous page, and by removing from this sum a predefined tolerance height.
- the motor shaft 19, between the successive prints of two image pages and under the control of the control block 21, is rotated in the reverse direction by the motor 18 until the tape 10 is unwound from the take-up roll, which is simultaneously rewound on the food roll, of the assessed rewinding length.
- the pinion 34 Under the action of the rotation drive of the motor shaft 19 in the return direction, the pinion 34 is rotated in the return direction and itself rotates the pinion 23 in the return direction.
- the drive of the pinion 23 causes the rotation of the pinion 28 which in turn drives the pinion 32, via the pinion 29.
- the pinion 38 of axis 2 of the food roller is rotated in the return direction.
- the take-up roller is in turn driven in the return direction, under the tensile force exerted by the tape 10.
- the non-return system 31 applies a resistant torque to the axis 3 support of the take-up roller so that it is braked and rotates less quickly than the food roller. Thanks to this, the ribbon 10 is tight when rewound on the food roll.
- the sensor 17 detects and counts the positioning bars of the printing ribbon 10 traveling through the printing line 8 of the thermal head 1 and, the bars being separated from each other by a given and fixed interval, evaluates the length of which the ribbon 10 is effectively rewound.
- the control block 21 controls the stopping of the motor 18.
- the block 15 would convert the evaluated rewinding height into the number of revolutions of the motor 19 and the latter would be rotated in the reverse direction substantially by the number of revolutions thus evaluated.
- a more improved variant of the economical printing method of the invention differs from the embodiment of the method described above only in what will now be described.
- the printer comprises, in addition to the elements described above, a working memory intended to contain the positions of printing lines and unusable lines of previously used portions of ribbon as well as the positions of image lines and empty lines of image of image pages to print.
- positions of the lines of the ribbon are defined relative to the printing line of the writing head and the positions of the lines of the image page are defined relative to the top line of the page. to be printed.
- print lines and “unusable lines” is meant here respectively to designate blank lines of ribbon 10 and ribbon lines already used, in whole or in part, for printing image dots.
- the digital analysis block examines:
- the digital analysis block analyzes the lines of this page image.
- the unusable lines and the printing lines of the portion of ribbon used correspond respectively to the image lines and to the empty image lines of the image page previously printed with this portion of ribbon.
- the digital analysis block compares, by their respective positions, the image lines of the page examined and the remaining printing lines of the portion of ribbon previously used, in order to determine whether the image lines of the page examined may at least in part be printed using the remaining printing lines of the previously used portion of ribbon, separated from the portion of ribbon not yet used by at least one unusable line.
- the digital analysis block determines the length of tape rewinding, that is to say the length of tape along which the tape should be driven in the reverse direction, by unwinding the take-up roll and rewind on the food roll, so as to properly position the printing ribbon in relation to the printing line of the thermal head.
- the ribbon is correctly positioned when the remaining print lines of the previously used portion of ribbon, intended for printing image lines of the page to be printed, pass through the print line of the thermal head for printing. of these image lines on a print media sheet.
- FIG. 4 illustrates such an example in which an oval-shaped element 101 is first printed, then a triangular-shaped element 102 using the portion of ribbon already used.
- the arrows 36 and 37 respectively indicate the forward direction and the return direction of the ribbon drive.
- the oval element 101 is printed in negative during a first printing pass of the ribbon in the forward direction 36 in front of the thermal head, then the ribbon is driven in the backward direction 37 and, during a second printing pass of the ribbon in the forward direction 36 in front of the thermal head, the triangular shaped element 102, located in FIG. 4 upstream of the oval-shaped element 101 in the forward direction 36 is printed.
- a line of a portion of ribbon previously used is a printing line, in other words a line usable for printing a line image, if this line of the ribbon is blank.
- lines of printing ribbon slightly depleted in ink are used to print image lines.
- the digital analysis block evaluates the surface ink density of each line of the portion of ribbon previously used, compares it to a predefined threshold and, in the case where the evaluated density is greater than the threshold, the analysis block considers that said line of the ribbon is a printing line, usable for printing an image line.
- the digital analysis block evaluates the density of image points of the image line previously printed using this line of the ribbon.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9805515A FR2778143B1 (en) | 1998-04-30 | 1998-04-30 | ECONOMIC PRINTING METHOD USING A PRINTING TAPE, PRINTING DEVICE, AND PRINTING TAPE FOR CARRYING OUT THE METHOD |
FR9805515 | 1998-04-30 | ||
PCT/FR1999/001033 WO1999056961A1 (en) | 1998-04-30 | 1999-04-30 | Economical printing method using an imaging tape and device for implementing said method |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1075391A1 true EP1075391A1 (en) | 2001-02-14 |
EP1075391B1 EP1075391B1 (en) | 2002-03-20 |
Family
ID=9525920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99916965A Expired - Lifetime EP1075391B1 (en) | 1998-04-30 | 1999-04-30 | Economical printing method using an imaging tape and device for implementing said method |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1075391B1 (en) |
JP (1) | JP2002513700A (en) |
AU (1) | AU3526499A (en) |
DE (1) | DE69901058T2 (en) |
FR (1) | FR2778143B1 (en) |
WO (1) | WO1999056961A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3574763B2 (en) * | 1999-08-11 | 2004-10-06 | 株式会社大生機械 | Printing method with line thermal head |
US7474323B2 (en) * | 2005-08-02 | 2009-01-06 | Sony Corporation | Print apparatus, ribbon movement control device, ribbon film, ribbon movement control method, and program |
JP4929032B2 (en) * | 2007-04-26 | 2012-05-09 | 日本電産サンキョー株式会社 | Printing device |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6021279A (en) * | 1983-07-15 | 1985-02-02 | Toshiba Corp | Image forming apparatus |
JPS6114972A (en) * | 1984-07-02 | 1986-01-23 | Minolta Camera Co Ltd | Transfer-type thermal color printer |
JPS6131282A (en) * | 1984-07-24 | 1986-02-13 | Fuji Xerox Co Ltd | Serial color thermal transfer printer |
JPH0361061A (en) * | 1989-07-28 | 1991-03-15 | Nec Home Electron Ltd | Printer |
JPH03176175A (en) * | 1989-12-06 | 1991-07-31 | Canon Inc | Thermal transfer recording apparatus |
JPH0569643A (en) * | 1991-09-11 | 1993-03-23 | Sony Corp | Ribbon cartridge type printer and ribbon cartridge |
EP0635368A3 (en) * | 1994-05-26 | 1995-09-06 | Illinois Tool Works | Method and apparatus for low cost thermal printing. |
-
1998
- 1998-04-30 FR FR9805515A patent/FR2778143B1/en not_active Expired - Fee Related
-
1999
- 1999-04-30 EP EP99916965A patent/EP1075391B1/en not_active Expired - Lifetime
- 1999-04-30 AU AU35264/99A patent/AU3526499A/en not_active Abandoned
- 1999-04-30 DE DE69901058T patent/DE69901058T2/en not_active Expired - Fee Related
- 1999-04-30 JP JP2000546956A patent/JP2002513700A/en active Pending
- 1999-04-30 WO PCT/FR1999/001033 patent/WO1999056961A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9956961A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2778143B1 (en) | 2000-06-09 |
AU3526499A (en) | 1999-11-23 |
DE69901058T2 (en) | 2002-10-31 |
WO1999056961A1 (en) | 1999-11-11 |
DE69901058D1 (en) | 2002-04-25 |
EP1075391B1 (en) | 2002-03-20 |
FR2778143A1 (en) | 1999-11-05 |
JP2002513700A (en) | 2002-05-14 |
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