WO2015151538A1 - 画像形成装置および画像形成方法 - Google Patents
画像形成装置および画像形成方法 Download PDFInfo
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- WO2015151538A1 WO2015151538A1 PCT/JP2015/050269 JP2015050269W WO2015151538A1 WO 2015151538 A1 WO2015151538 A1 WO 2015151538A1 JP 2015050269 W JP2015050269 W JP 2015050269W WO 2015151538 A1 WO2015151538 A1 WO 2015151538A1
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- WIPO (PCT)
- Prior art keywords
- size
- image
- transfer material
- image forming
- head
- Prior art date
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
- G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
- G03G15/1605—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support
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- 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
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/325—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads by selective transfer of ink from ink carrier, e.g. from ink ribbon or sheet
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- 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
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/35—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads providing current or voltage to the thermal head
- B41J2/355—Control circuits for heating-element selection
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- 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
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/35—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads providing current or voltage to the thermal head
- B41J2/355—Control circuits for heating-element selection
- B41J2/36—Print density control
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- 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
- B41J31/00—Ink ribbons; Renovating or testing ink ribbons
- B41J31/14—Renovating or testing ink ribbons
Definitions
- the present invention relates to an image forming apparatus and an image forming method.
- An image forming apparatus that forms an image on a recording medium by transferring a transfer material to each of a plurality of transfer material regions arranged repeatedly in the longitudinal direction of a belt-shaped transfer medium.
- An image forming apparatus capable of forming a new image is known.
- Patent Document 1 when L size printing is performed using an ink ribbon compatible with 2L size, instead of using the ink ribbon from the head direction (ink ribbon winding direction) of the ink ribbon, which is normally considered, A thermal transfer color printer used from (ink ribbon rewind direction) is described.
- Patent Document 2 has a function of printing a plurality of screens having a size smaller than the surface of the ink layer of the ink ribbon, and the ink ribbon receives the average gradation value of the image printed earlier.
- a printer that determines the amount of thermal damage and controls whether to rewind the ink ribbon to use the remaining unused part or to use a new part of the ink ribbon when printing the next image. are listed.
- a transfer medium such as an ink ribbon is damaged by heat applied when a transfer material is transferred to a recording medium.
- this damage increases and the transfer medium extends.
- wrinkles are generated on the transfer medium where the transfer material has been removed. There is a risk that the image quality of the generated image will be damaged by the defects.
- an object of the present invention is to suppress damage to the transfer medium due to heat when the transfer material region is partially used.
- An image forming apparatus includes: a transport unit configured to transport a belt-shaped transfer medium in which a plurality of transfer material regions of a first size corresponding to a plurality of transfer materials are repeatedly arranged in a longitudinal direction in a predetermined order; An image forming unit that transfers a transfer material by heating for each material region and forms an image of a second size that is less than or equal to the first size or half of the first size on a recording medium; When the image forming unit forms an image of the second size, an unused portion included in each transfer material region already used for image formation of the second size or a new transfer medium Using the transfer material region, the second size image formation using the new transfer material region is performed at a lower speed than the first size image formation.
- the image forming unit performs the first size image formation using the unused portion included in each transfer material region already used for the second size image formation. It is preferable that the image forming is performed at the same speed as the image formation of the second size or at the same speed as the image formation of the second size using the new transfer material region.
- the image forming unit forms the first size image when forming the second size image at a lower speed than when forming the first size image. It is preferable to heat the transfer material region at a low temperature as compared with the case where it is performed.
- the image forming unit may apply the same amount of heat per unit area to the transfer material region when forming the second size image as when forming the first size image. preferable.
- the first half portion of each transfer material region along the transfer medium conveyance direction is used. It is preferable to use it.
- the image forming method includes a transporting step of transporting a belt-shaped transfer medium in which a plurality of transfer material regions of a first size corresponding to a plurality of transfer materials are repeatedly arranged in a longitudinal direction in a predetermined order; An image forming step of transferring a transfer material by heating for each transfer material region to form an image having a first size or a second size less than half of the first size on a recording medium; In the image forming step, when forming the second size image, the unused portion included in each transfer material region already used for the second size image formation or the transfer medium A new transfer material region is used, and image formation of the second size using the new transfer material region is performed at a lower speed than image formation of the first size.
- FIG. 2 is a diagram for explaining a schematic configuration of a printer.
- (A) And (B) is the figure which expanded the periphery of the head 3 of FIG. (A) to (D) are diagrams for explaining the movement of the ink ribbon 4.
- (A) to (C) are graphs for explaining the relationship between the printing speed, the head temperature, and the ribbon elongation amount, and examples of the energization waveform of the head 3 when printing at normal printing speed and printing at low speed. It is a graph which shows. 3 is a flowchart illustrating an operation example of the printer 1.
- FIG. 1 is a diagram for explaining a schematic configuration of the printer 1. In FIG. 1, only components necessary for explanation are shown in the components included in the printer 1, and other components are omitted.
- the printer 1 (an example of an image forming apparatus) reciprocates a roll-shaped recording paper (an example of a recording medium) with respect to a head, thereby repeating image formation a plurality of times on the recording paper, For example, the printer forms an image with a plurality of colors of yellow, magenta, and cyan.
- image formation is also referred to as “printing”.
- the printer 1 holds the roll-shaped recording paper 10 on the roll paper holder 2 and forms an image on the recording surface of the recording paper 10 unwound from the roll paper holder 2.
- the central axis of the roll-shaped recording paper 10 is rotatably supported by the roll paper holder 2.
- the recording paper 10 is rotatably accommodated in the roll paper holder 2.
- Image formation is performed by recording ink at a predetermined position by the head 3 while bringing the ink ribbon 4 (an example of a transfer medium) into contact with the recording surface of the recording paper 10. At that time, the ink ribbon 4 and the recording paper 10 are moved in an overlapped manner and passed between the head 3 and the platen roller 9.
- the head 3 is configured to be movable with respect to the platen roller 9, and is pressed against and contacts the platen roller 9 during image formation.
- the printer 1 forms an image by causing a heating element constituting the head 3 to generate heat in a predetermined pattern and transferring the image from the ink ribbon 4 onto the recording paper 10.
- ink regions corresponding to the color to be imaged are sequentially prepared on the ink ribbon 4 along the winding direction of the ink ribbon 4.
- the operation of passing the ink region through the head 3 while winding the ink ribbon 4 is repeated for each color.
- the ink ribbon 4 is supplied from the supply side ribbon roller 4A and is taken up by the take-up side ribbon roller 4B.
- these rollers are also simply referred to as “ribbon rollers 4A and 4B”.
- the ink ribbon 4 is guided by a ribbon guide roller 15 between the supply side ribbon roller 4 ⁇ / b> A and the head 3, and a ribbon guide portion 16 (see FIG. 2A) configured integrally with the head 3.
- the recording paper 10 is rewound after the paper is fed (unrolled) according to the length of the image 3 once passing through the position of the head 3 in the image formation of each color.
- the head 3 forms an image in the process of rewinding the recording paper 10.
- the printer 1 reciprocates the recording paper 10 in order to form an image of each color on the same image forming area of the recording paper 10.
- the reciprocation of the recording paper 10 is performed by a grip roller 17 and a pinch roller 18 provided in the conveyance path of the recording paper 10. These rollers repeat the unwinding and rewinding of the recording paper 10 while changing the rotation direction of the roll paper holder 2 in accordance with the conveying direction of the recording paper 10.
- the pinch roller 18 When image formation is not performed, the pinch roller 18 is separated from the grip roller 17 and the recording paper 10 is released. On the other hand, at the time of image formation, the grip roller 17 and the pinch roller 18 convey the recording paper 10 therebetween. In this way, the printer 1 reciprocates the recording paper 10 with respect to the head 3 and repeatedly performs image formation a plurality of times on the same image forming area of the recording paper 10.
- the ink ribbon 4 includes an overcoat layer (an example of a transfer material) in addition to yellow, magenta, and cyan ink regions.
- the recording surface of the recording paper 10 on which all color image formation has been completed is protected by being covered with this overcoat layer.
- the printer 1 includes a recording paper cutting unit 5 on the discharge path 13 and at a position immediately before the discharge port 6.
- the recording paper 10 on which image formation has been completed passes through the portion of the head 3, then passes through the discharge path 13, and is discharged out of the printer from the discharge port 6 provided in the housing 7 of the printer 1.
- the recording paper cutting unit 5 cuts the recording paper 10 sent to the outside from the discharge port 6 at a position before the discharge port 6. As a result, the cut recording paper 10 is taken out from the discharge port 6.
- the printer 1 further includes a control unit 30, a data memory 31, a recording paper drive unit 32, a head drive unit 33, an ink ribbon drive unit 34, a cutting control unit 35, a communication interface 36, and a timer 37.
- the control unit 30 controls the overall operation of the printer 1.
- the control unit 30 includes a CPU, a RAM, a ROM, and the like, and executes an image forming process to be described later by loading a program stored in the ROM into the RAM and executing it.
- the data memory 31 is a storage area for accumulating image data received from the host computer via the communication interface 36.
- the recording paper driving unit 32 drives the recording paper 10 with the recording paper 10 sandwiched between the grip roller 17 and the pinch roller 18.
- the recording paper drive unit 32 feeds the recording paper 10 by rotationally driving the grip roller 17 and the roll paper holder 2.
- the recording paper driving unit 32 reverses the driving direction and rotationally drives the grip roller 17 and the roll paper holder 2 to rewind the fed recording paper 10.
- the printer 1 forms an image on the recording paper 10 when the sent recording paper 10 is rewound.
- the head driving unit 33 drives the head 3 based on the image data to form an image on the recording paper 10.
- the head 3 can use a mechanism corresponding to various image forming methods such as a sublimation type printer and a thermal melting type printer.
- a head 3, a platen roller 9, and a head driving unit 33 are provided as an example of an image forming unit that forms an image on a recording medium.
- the ink ribbon drive unit 34 drives the supply side ribbon roller 4A and the take-up side ribbon roller 4B, and moves the ink ribbon 4 relative to the head 3 in synchronization with the drive of the head 3.
- the ink ribbon drive unit 34 also includes a rewinding mechanism for the ink ribbon 4, and can drive the ink ribbon 4 in a rewinding direction that is opposite to the winding direction (forward direction).
- ribbon rollers 4 ⁇ / b> A and 4 ⁇ / b> B and an ink ribbon drive unit 34 are provided as an example of a transport unit that transports a belt-shaped transfer medium.
- the cutting control unit 35 cuts the rear end of the recording portion of the recording paper 10 and cuts the recording paper 10 one by one when the recording paper 10 is discharged to the outside through the discharge path 13 through the discharge path 13.
- the cutting unit 5 is controlled.
- the communication interface 36 transmits / receives data to / from the host computer via a communication cable. For example, when the timer 37 continuously receives two pieces of image data having a size smaller than the ink area of the ink ribbon 4 within a predetermined time from the host computer, the timer 37 receives the two pieces of image data within the same ink area. The elapsed time is measured in order to perform the process of allocating images to form images.
- FIG. 2A and 2B are enlarged views of the periphery of the head 3 in FIG.
- FIG. 2A shows the positional relationship between the head 3 and the recording paper 10 when image formation starts for one color.
- FIG. 2B shows the positional relationship between the head 3 and the recording paper 10 when image formation for one color is completed.
- the position of the head 3 during image formation is indicated by a solid line
- the position of the head 3 when no image is formed is indicated by a broken line, and each is superimposed on one figure.
- the recording paper 10 is sent out in the direction of arrow A according to the length of the image forming area on the recording paper 10, and the recording paper 10 End portion 10E comes to the left in the figure.
- the head of the yellow ink area and the head of the image formation area on the recording paper 10 are aligned with the position Ph where the head 3 forms an image.
- the position where the head 3 forms an image on the transport path of the ink ribbon 4 is referred to as “head position Ph”.
- the recording paper 10 is conveyed in the direction of arrow B and the ink ribbon 4 is conveyed in the direction of arrow C while the yellow color is applied to the recording paper 10 by the head 3.
- Image formation is performed.
- the recording paper 10 is sent out in the direction of arrow A again.
- the positional relationship between the head 3 and the recording paper 10 is again in the same state as in FIG.
- the head of the next magenta ink area and the head of the image forming area on the recording paper 10 are aligned with the head position Ph, and magenta image formation is performed.
- the recording paper 10 is image-formed with respect to yellow, magenta, cyan and overcoat while moving back and forth in the drawing.
- the recording paper 10 is fed in the direction of arrow A, cut by the recording paper cutting unit 5 at the trailing edge of the image, and discharged.
- the ink ribbon 4 is conveyed in the direction of arrow C when it is wound on the winding side ribbon roller 4B, and is conveyed in the direction of arrow D when it is rewound on the supply side ribbon roller 4A.
- the arrow C direction and the arrow D direction correspond to the winding direction and the rewinding direction, respectively.
- the arrow C direction from the supply side ribbon roller 4A to the take-up side ribbon roller 4B is from upstream to downstream. This is opposite to the arrow A direction in which the recording paper 10 passes through the head 3 and the platen roller 9 and is discharged through the discharge path 13.
- a ribbon sensor 8 for detecting the boundary of each ink region of the ink ribbon 4 to which yellow, magenta, cyan, and overcoat are sequentially applied is downstream of the head 3 in the winding direction of the ink ribbon 4.
- the ribbon sensor 8 is an example of a detection unit that detects a boundary between transfer material regions.
- the ribbon sensor detects the boundary of the next region when the printing of each color is finished and the ink ribbon 4 is further wound.
- an ink area of each color and an overcoat area are referred to as a “panel”, and a boundary between the panels is referred to as a “panel boundary”.
- the position Ps (detection position) where the ribbon sensor 8 is provided on the transport path of the ink ribbon 4 is referred to as “sensor position Ps”.
- the ribbon sensor may be arranged anywhere as long as it is within a range where each panel boundary can be detected.
- a ribbon sensor may be disposed upstream of the head 3 in the winding direction of the ink ribbon 4.
- a transmissive color sensor is used as the ribbon sensor 8.
- the transmissive color sensor includes a light-emitting side ribbon sensor and a light-receiving side ribbon sensor provided at positions facing each other across the transport path of the ink ribbon 4.
- the light emitting side ribbon sensor and the light receiving side ribbon sensor may be arranged at positions opposite to each other.
- one or both of the ribbon rollers 4A and 4B are provided with an encoder that detects the amount of ink ribbon 4 transferred.
- the ink ribbon drive unit 34 determines each of the head positions Ph of the head 3 based on the number of pulses of the encoder, the winding diameter of one or both of the ribbon rollers 4A and 4B, the detection result of the ribbon sensor 8, and the like. Calculate the feed amount required to position the top of the panel.
- the ink ribbon drive unit 34 positions the head of each panel at the head position Ph by conveying the ink ribbon 4 according to the feed amount.
- the length at which an image can be formed on the recording paper 10 depends on the length of each color of the ink ribbon 4. For example, when forming an image corresponding to a photograph of the L plate and the 2L plate, the printer 1 uses an ink ribbon 4 having a length corresponding to the dimensions of the L plate and the 2L plate, respectively. However, the printer 1 can also form an image shorter than the length corresponding to the ink ribbon 4. For example, when a 2L version ink ribbon is attached, the printer 1 can form an L version image in addition to the 2L version.
- either one of the ribbon rollers 4A and 4B incorporates an RFID tag that stores data such as data relating to the characteristics of the ink ribbon 4 and information such as the accumulated usage amount (remaining usable amount).
- This RFID tag information is used for setting the printing conditions of the printer 1 (the energization conditions of the head 3).
- the printer 1 can print an image having a size smaller than the size of the panel of the ink ribbon 4.
- the size is 6 ⁇ 4 inches (152 ⁇ 101 mm) which is 6 ⁇ 8 inches or half thereof.
- the size is not limited to these, and the following operation example can be applied to a set of two sizes whose areas differ by a factor of two or more.
- the pair of two sizes may be A5 size (148 ⁇ 210 mm) and A6 size (105 ⁇ 148 mm), 2L size (127 ⁇ 178 mm), L size (89 ⁇ 127 mm), and the like.
- the size of 6 ⁇ 8 inches is referred to as “6 ⁇ 8 size”
- the size of 6 ⁇ 4 inches is referred to as “6 ⁇ 4 size”.
- the 6 ⁇ 8 size is an example of the first size
- the 6 ⁇ 4 size is an example of the second size that is half or less of the first size.
- the printer 1 uses the entire surface of the 6 ⁇ 8 size panel for each of yellow, magenta, cyan, and overcoat on the recording paper 10. The image is formed.
- the printer 1 determines the 6 ⁇ 8 size with respect to the winding direction (forward direction) of the ink ribbon 4 for each of yellow, magenta, cyan, and overcoat.
- the image is formed on the recording paper 10 using the first half or the second half of the panel.
- the printer 1 uses the first half of the new panel.
- the printer 1 uses the unused portion (the second half of the partially used panel).
- the head 3 performs 6 ⁇ 4 size image formation using the first half of the new panel at a lower speed than 6 ⁇ 8 size image formation. That is, when the control unit 30 forms a 6 ⁇ 4 size image using the first half of the new panel, the control unit 30 moves the head 3 to the platen roller 9 with a longer printing cycle than when a 6 ⁇ 8 size image is formed. By pressing, each color ink and overcoat of the ink ribbon 4 are transferred to the recording paper 10 at a lower speed. As described above, in the printer 1, when the new panel is partially used, printing is performed at a reduced speed, thereby reducing damage to the ink ribbon 4 during the transfer. Thus, when a 6 ⁇ 4 size image is formed using the unused portion (second half portion) of the panel, wrinkles are not generated on the panel.
- the head 3 is slower than the 6 ⁇ 8 size image formation or the 6 ⁇ 8 size image formation. Perform at the same speed.
- the printer 1 In order to reuse a half-unused panel, when the printer 1 forms a 6 ⁇ 4 size image using the first half of a new panel, it indicates that the second half of the panel is unused. For example, it is stored in an RFID tag built in either one of the ribbon rollers 4A and 4B. Then, the control unit 30 of the printer 1 uses a new panel from the information and the image size to be printed instructed by the host computer, or rewinds the ink ribbon 4 and re-uses the half unused panel. Determine whether to use.
- the ink ribbon drive unit 34 aligns the head of the new yellow panel with the head position Ph.
- the control unit 30 determines that the half unused panel is to be reused
- the ink ribbon driving unit 34 determines that the head position Ph of the unused part in the half unused yellow panel reaches the head position Ph.
- the ink ribbon 4 is rewound by the rewinding mechanism of the ink ribbon 4.
- FIG. 3 (A) to 3 (D) are diagrams for explaining the movement of the ink ribbon 4.
- FIG. 3 (A) to 3 (D) are diagrams for explaining the movement of the ink ribbon 4.
- FIG. 3A shows the 6 ⁇ 8 size ink ribbon 4.
- the region 40 is a panel that has been used entirely, and the region 41 is a panel that has not been used.
- Region 40 includes a panel of yellow Y0, magenta M0, cyan C0 and overcoat OP0, and region 41 includes a panel of yellow Y1, magenta M1, cyan C1 and overcoat OP1. It is assumed that the yellow, magenta, cyan, and overcoat panels are also repeatedly arranged in this order in a range (not shown) on the left side of the region 40 and the right side of the region 41.
- FIG. 3A shows a state before the start of printing using the panel up to the area 40 and using the area 41.
- the head portion of yellow Y1 is located at the head position Ph.
- an image of 6 ⁇ 4 size is formed using the first half of the panel in the area 41 in the direction of arrow C (forward direction, winding direction) in response to a printing instruction from the host computer. Shows the state after.
- the ink ribbon 4 is wound around the winding-side ribbon roller 4B by the ink ribbon driving unit 34 during printing, and is conveyed in the direction of arrow C.
- 6 ⁇ 4 size image formation for each color ink and overcoat using the first half of the new panel is performed at a lower speed than 6 ⁇ 8 size image formation.
- the area 41 that was an unused panel on the entire surface before printing becomes a half unused panel by using the first half part in the winding direction.
- FIG. 3C shows a state before printing when a printing instruction of 6 ⁇ 4 size is further received from the host computer and the latter half of the area 41 panel in the direction of arrow C, which is an unused part, is used.
- the ink ribbon 4 is conveyed by the ink ribbon drive unit 34 in the direction of arrow D (reverse direction, rewind direction) toward the supply-side ribbon roller 4A. Then, the ink ribbon 4 is rewound until the head of the second half portion of the yellow Y1 used in the previous image formation reaches the head position Ph.
- FIG. 3D shows a state after an image of 6 ⁇ 4 size is formed using the latter half of the panel in the region 41.
- the ink ribbon 4 is wound around the winding-side ribbon roller 4B by the ink ribbon driving unit 34 during printing, and is conveyed in the direction of arrow C.
- 6 ⁇ 4 size image formation for each color ink and overcoat using the latter half of the half unused panel is slower than 6 ⁇ 8 size image formation or 6 ⁇ 8 size image formation. Done at the same speed.
- the area 41 that was a half-unused panel before printing becomes a panel that has been fully used by using the latter half of the winding direction. Thereafter, a new image is formed using the panel of the next area 42.
- FIG. 4A is a graph for explaining the relationship between the printing speed, the head temperature, and the ribbon elongation.
- the graph on the left side of FIG. 4A shows an example of the relationship between the elapsed time t during printing and the temperature T of the head 3.
- the graph on the right side of FIG. 4A shows an example of the relationship between the maximum temperature Tmax of the head 3 and the panel extension amount ⁇ L.
- the magnitude of the extension amount ⁇ L corresponds to the magnitude of damage that the panel of the ink ribbon 4 receives.
- P1 is a printing cycle when 6 ⁇ 8 size image formation is performed. That is, in the image formation of 6 ⁇ 8 size, the temperature of the head 3 when the head 3 is pressed against the platen roller 9 for each of yellow, magenta, cyan, and overcoat is the period P1 in FIG. To change. In order to transfer (color development) each color ink, it is necessary to heat the head 3 to a certain temperature T0 or higher. In image formation of 6 ⁇ 8 size, a heat amount corresponding to the area of Q1 shown in FIG. 4A is applied to each panel.
- P2 is a printing cycle when 6 ⁇ 4 size image formation is performed using the first half of a new panel. That is, in the 6 ⁇ 4 size image formation at this time, the temperature of the head 3 when the head 3 is pressed against the platen roller 9 for each of yellow, magenta, cyan, and overcoat is a cycle P2 longer than P1. Changes are made as shown in FIG. In 6 ⁇ 4 size image formation at this time, the amount of heat corresponding to the area of Q2 shown in FIG. 4A is applied to each panel. Since the energy required for color development is the same regardless of the printing speed, the printing speed and the peak temperature of the head 3 are set so that the amount of heat Q2 is the same as Q1.
- the head 3 uses a new panel to form a 6 ⁇ 4 size image compared to a 6 ⁇ 8 size image. Heat the new panel at low speed and low temperature.
- the printing speed is fast, in order to obtain energy necessary for color development, it is necessary to increase the peak temperature of the head 3 (T1 in FIG. 4A) and instantaneously add a large amount of heat.
- the printing speed is decreased, the same amount of heat can be applied over a longer time even if the peak temperature of the head 3 is relatively lowered (T2 in FIG. 4A). Energy is obtained.
- FIG. 4B and 4C are graphs showing examples of energization waveforms of the head 3 when printing at a normal printing speed and printing at a low speed, respectively. That is, FIG. 4B is a graph when printing is performed at the printing cycle P1, and FIG. 4C is a graph when printing is performed at the printing cycle P2.
- the vertical axis of each graph represents the current I for heating the head 3, and the horizontal axis represents time t. Since energization is performed by chopper driving, the waveform is strip-shaped.
- the cycle of one line is 0.75 ms, and the average current is 6.3 A.
- the average current is suppressed to 4.88 A by slowing the cycle of one line to 1.38 ms, so that the temperature is lower than that at the time of printing at the normal printing speed.
- each panel of the ink ribbon 4 is heated.
- the elongation amount ⁇ L2 of each panel when the peak temperature of the head 3 is at the lower temperature T2 is the elongation amount of each panel when the peak temperature of the head 3 is at the higher temperature T1. It becomes smaller than the amount ⁇ L1. For this reason, when a 6 ⁇ 4 size image is formed using a new panel, it is possible to reduce the elongation generated in a half-unused panel by reducing the printing speed and suppressing the peak temperature. .
- the head 3 uses the new panel to form a 6 ⁇ 4 size image, and uses the new panel to generate the same amount of heat per unit area as when forming a 6 ⁇ 8 size image.
- Q1 Q2
- the control unit 30 detects the temperature change of the head 3 in real time with a temperature sensor (thermistor) and controls the heater (heating element) of the head 3 to change the temperature of the head 3 almost in real time.
- a temperature sensor thermoistor
- the heater heating element
- 6 ⁇ 4 size image formation using an unused portion (second half portion) of a partially used panel has the same period P2 or 6 ⁇ 8 size image formation as 6 ⁇ 8 size image formation. Performed at P1.
- the unused portion of the partially used panel It is preferable to perform 6 ⁇ 4 size image formation using a longer period P2 than 6 ⁇ 8 size image formation.
- FIG. 5 is a flowchart showing an operation example of the printer 1.
- the flow shown in FIG. 5 is executed by the CPU in the control unit 30 according to a program stored in advance in the ROM in the control unit 30. Assume that a 6 ⁇ 8 size ink ribbon 4 is set in the printer 1.
- the printer 1 receives a printing instruction and image data to be printed from the host computer (S1). Then, the control unit 30 determines whether or not the image data is 6 ⁇ 4 size (S2). For example, when the image data is not 6 ⁇ 4 size, such as 6 ⁇ 8 size (No in S2), the process proceeds to S31 described later. If the image data is larger than the 6 ⁇ 8 panel, error processing is performed (not shown).
- control unit 30 When the image data is 6 ⁇ 4 size (Yes in S2), the control unit 30 further refers to information indicating the presence / absence of a half unused panel held in the printer, for example, to display a new panel. It is determined whether to use or rewind the ink ribbon 4 and reuse a half-used panel (S3).
- the head 3 uses one panel (initially yellow Y) to print at low speed. Image formation is performed at a speed as shown in FIG. 3B (S11). Specifically, the recording paper drive unit 32 sends out the recording paper 10 in accordance with the size of the image forming area on the recording paper 10. The head driving unit 33 moves the head 3 and presses it against the platen roller 9. Then, while rewinding the recording paper 10 sent out by the recording paper driving unit 32, an image is formed by the head 3 for one color (initially yellow Y) at the printing cycle P2 shown in FIG. At this time, the ink ribbon 4 is also moved together. The rewinding of the recording paper 10, the winding of the ink ribbon 4, and the image formation by the head 3 are performed in synchronization. When the image formation for one color is completed, the head driving unit 33 moves the head 3 away from the platen roller 9.
- the ink ribbon drive unit 34 winds up the ink ribbon 4 until the head of the panel of the next color (the second color is magenta M) comes to the head position Ph (S12).
- the control unit 30 determines whether or not the printing up to the overcoat OP has been completed (S13). If the overcoat OP has not yet been printed (No in S13), the process returns to S11, and magenta M, cyan C, and overcoat OP are also subjected to image formation as in the case of yellow Y. In this manner, yellow Y, magenta M and cyan C color images are formed on the same image forming area of the recording paper 10, and the overcoat layer is covered to form a protective layer.
- the process proceeds to S40.
- the ink ribbon drive unit 34 uses the partially used yellow Y panel as shown in FIG. The ink ribbon 4 is rewound until the head of the unused second half of the head reaches the head position Ph (S20). At that time, the ink ribbon drive unit 34 calculates a necessary feed amount based on the pitch of each panel, the number of pulses of the encoder, the winding diameters of the ribbon rollers 4A and 4B, and the ink ribbon 4 is transferred according to this feed amount. Rewind in the direction of arrow D.
- the head 3 uses one panel (initially yellow Y) to form an image as shown in FIG. 3D at a low printing speed or a normal printing speed (S21).
- the processing at this time is the same as S11 described above except that at the normal printing speed, an image is formed by the head 3 at the printing cycle P1 shown in FIG. 4A for each color.
- the control unit 30 determines whether the printing up to the overcoat OP has been completed (S22). If the overcoat OP has not been printed yet (No in S22), the ink ribbon drive unit 34 sets the head of the unused second half of the next color (second color is magenta M) to the head position Ph. The ink ribbon 4 is wound up until it comes (S23).
- the process returns to S21, and image formation is performed for magenta M, cyan C, and overcoat OP as in the case of yellow Y.
- the printer 1 forms color images of each color of yellow Y, magenta M, and cyan C on the same image forming area of the recording paper 10, and covers the overcoat layer to form a protective layer.
- the process proceeds to S40.
- the head 3 uses the entire surface of the new panel at the normal printing speed (ie, In the printing cycle P1 shown in FIG. 4A, image formation is performed in the same manner as in S21 (S31).
- the process proceeds to S40.
- the recording paper drive unit 32 sends out the recording paper 10, and the recording paper cutting unit 5 cuts the recording paper 10 and discharges it from the discharge port 6 (S40).
- the printer 1 ends the operation.
- the printer 1 when 6 ⁇ 4 size printing is performed using half of a new 6 ⁇ 8 size panel, half of the printer 1 is used by setting the printing speed lower than usual. Reduce the damage the panel receives. As a result, when the ink ribbon 4 is rewound and an unused portion of the panel is used to form a 6 ⁇ 4 size image, the panel is prevented from wrinkling.
- the printer 1 can use the remaining unused portion for forming a new image even when a high-density image is formed by partially using the panel. Since the printer 1 does not determine whether or not the panel can be reused based on the density of the previously printed image, it is determined that a half-unused panel is not reused, and the panel is not wasted. It is possible to print the same number of sheets as the remaining amount.
- each panel is used from the front half along the transport direction of the ink ribbon 4. Either the first half or the second half can be used.
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Abstract
Description
2 ロール紙ホルダ
3 ヘッド
4 インクリボン
4A 供給側リボンローラ
4B 巻取側リボンローラ
8 リボンセンサ
9 プラテンローラ
10 記録用紙
30 制御部
Ph ヘッド位置
Ps センサ位置
Claims (6)
- 複数の転写材料にそれぞれ対応する第1の大きさの複数の転写材料領域が予め定められた順序で長手方向に繰り返し配置された帯状の転写媒体を搬送する搬送部と、
前記転写材料領域ごとに加熱により前記転写材料を転写して、記録媒体上に前記第1の大きさまたは前記第1の大きさの半分以下である第2の大きさの画像を形成する画像形成部と、を有し、
前記画像形成部は、
前記第2の大きさの画像を形成するときに、前記第2の大きさの画像形成に既に使用された各転写材料領域に含まれる未使用部分か、または前記転写媒体の新たな転写材料領域を使用し、
前記新たな転写材料領域を使用した前記第2の大きさの画像形成を、前記第1の大きさの画像形成と比べて低速で行う、
ことを特徴とする画像形成装置。 - 前記画像形成部は、前記第2の大きさの画像形成に既に使用された各転写材料領域に含まれる未使用部分を使用した前記第2の大きさの画像形成を、前記第1の大きさの画像形成と同じ速度または前記新たな転写材料領域を使用した前記第2の大きさの画像形成と同じ速度で行う、請求項1に記載の画像形成装置。
- 前記画像形成部は、前記第1の大きさの画像を形成するときと比べて低速で前記第2の大きさの画像を形成するときに、前記第1の大きさの画像を形成するときと比べて低温で前記転写材料領域を加熱する、請求項2に記載の画像形成装置。
- 前記画像形成部は、前記第2の大きさの画像を形成するときに、前記第1の大きさの画像を形成するときと単位面積当たり同じ熱量を前記転写材料領域に加える、請求項3に記載の画像形成装置。
- 前記画像形成部は、前記新たな転写材料領域を使用して前記第2の大きさの画像を形成するときに、前記転写媒体の搬送方向に沿った各転写材料領域の前半部分を使用する、請求項1~4のいずれか一項に記載の画像形成装置。
- 複数の転写材料にそれぞれ対応する第1の大きさの複数の転写材料領域が予め定められた順序で長手方向に繰り返し配置された帯状の転写媒体を搬送する搬送工程と、
前記転写材料領域ごとに加熱により前記転写材料を転写して、記録媒体上に前記第1の大きさまたは前記第1の大きさの半分以下である第2の大きさの画像を形成する画像形成工程と、を有し、
前記画像形成工程では、
前記第2の大きさの画像を形成するときに、前記第2の大きさの画像形成に既に使用された各転写材料領域に含まれる未使用部分か、または前記転写媒体の新たな転写材料領域を使用し、
前記新たな転写材料領域を使用した前記第2の大きさの画像形成を、前記第1の大きさの画像形成と比べて低速で行う、
ことを特徴とする画像形成方法。
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US14/783,057 US9429882B2 (en) | 2014-03-31 | 2015-01-07 | Image forming apparatus and image forming method |
CN201580000893.2A CN105263714B (zh) | 2014-03-31 | 2015-01-07 | 图像形成装置以及图像形成方法 |
EP15774377.4A EP2993049B1 (en) | 2014-03-31 | 2015-01-07 | Image forming device and image forming method |
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JP2014073205A JP5822973B2 (ja) | 2014-03-31 | 2014-03-31 | 画像形成装置および画像形成方法 |
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EP (1) | EP2993049B1 (ja) |
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US6796732B2 (en) * | 2001-05-31 | 2004-09-28 | Nisca Corporation | Printing apparatus |
JP3665035B2 (ja) * | 2002-04-04 | 2005-06-29 | ニスカ株式会社 | 印刷装置及び印刷方法 |
JP2004202941A (ja) | 2002-12-26 | 2004-07-22 | Casio Comput Co Ltd | 昇華型プリンタ印刷制御方法 |
US7397489B2 (en) | 2005-02-17 | 2008-07-08 | Eastman Kodak Company | System and method for efficient donor material use |
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JP4940673B2 (ja) | 2006-01-27 | 2012-05-30 | シンフォニアテクノロジー株式会社 | プリンタ、およびプリント制御方法 |
US20080012928A1 (en) | 2006-07-13 | 2008-01-17 | Eastman Kodak Company | Producing standard format and wide-format prints with efficient donor material use |
WO2012095893A1 (ja) | 2011-01-14 | 2012-07-19 | 三菱電機株式会社 | 印画制御装置 |
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JPH0631954A (ja) * | 1992-07-20 | 1994-02-08 | Alps Electric Co Ltd | 熱転写プリンタ |
JPH06143720A (ja) * | 1992-10-30 | 1994-05-24 | Canon Inc | 記録媒体及び熱転写記録装置 |
JP2007038442A (ja) * | 2005-08-01 | 2007-02-15 | Shinko Electric Co Ltd | インクリボン、およびプリンタ |
JP2013144398A (ja) * | 2012-01-16 | 2013-07-25 | Mitsubishi Electric Corp | 熱転写型印刷装置 |
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US20160070211A1 (en) | 2016-03-10 |
US9429882B2 (en) | 2016-08-30 |
JP5822973B2 (ja) | 2015-11-25 |
EP2993049B1 (en) | 2017-09-27 |
JP2015193188A (ja) | 2015-11-05 |
CN105263714B (zh) | 2016-12-07 |
CN105263714A (zh) | 2016-01-20 |
EP2993049A4 (en) | 2016-08-03 |
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