Patent Grant
8459886
The present invention relates to a printing device and a printing method by a plurality of printing steps.
Conventional printing devices include processes for performing printing in each primary color, wherein the primary colors (for example, three primary colors of yellow, magenta, cyan) constitute a color image and into which the color image is divided. Further, for example, there is a color thermal printer including a step for performing overcoat printing.
Prior Art 1 involves a problem that it takes much time in printing.
There is provided according to one aspect of the present invention, a printing device for performing printing by a plurality of printing steps, the printing device including:
The printing device further includes:
In the printing device, a distance between a first printing position at which the first printing unit performs the printing on the printing medium and a cutting position at which the cutting unit cuts the printing medium is equal to a length of the printing medium from a fore-end of the printing medium to a point at which the first printing unit starts printing on the printing medium.
In the printing device, a distance between a cutting position at which the cutting unit cuts the printing medium and a second printing position at which the second printing unit performs the printing on the printing medium is equal to a length of the printing medium from a point at which the second printing unit starts printing on the printing medium to a point at which the cutting unit cuts the printing medium.
In the printing device, the second rotation unit nips the printing medium and the printing medium strip at a second printing position at which the second printing unit performs the printing on the printing medium.
The printing device further includes a third rotation unit to nip the printing medium at a third nip position, the third nip position being a prescribed position between a first printing position at which the first printing unit performs the printing on the printing medium and a cutting position at which the cutting unit cuts the printing medium strip from the printing medium, and to convey the printing medium nipped by rotating,
The printing device further includes a fourth rotation unit to nip the printing medium and the printing medium strip at a fourth nip position, the fourth nip position being a prescribed position between a cutting position at which the cutting unit cuts the printing medium strip from the printing medium and a second printing position at which the second printing unit performs the printing on the printing medium strip, and to convey the printing medium nipped and the printing medium strip nipped by rotating,
In the printing device, the first rotation unit conveys the printing medium to the first printing position, conveys the printing medium in a direction against a direction for conveying the printing medium after the first printing unit starts printing on the printing medium, and conveys the printing medium to a cutting position after the first printing unit completes the printing on the printing medium,
The printing device further includes a control unit to determine whether or not the printing on the printing medium is for a last one piece,
The printing device further includes:
The printing device further includes:
The printing device further includes a margin cutting unit to cut a margin from the printing medium strip on which the printing is performed by the second printing unit.
The printing device performs the printing either on a recording paper or a roll paper.
In the printing device, the first printing unit performs a color printing.
In the printing device, the second printing unit performs an overcoat process.
In the printing device, the first printing unit performs the printing on the printing medium in parallel with the printing on the printing medium strip performed by the second printing unit.
a first rotation unit to nip the printing medium between rollers rotatably fixed to the main body of the printing device, and to convey the printing medium by rotating the rollers; and
The printing device further includes:
The printing device further includes:
The printing device further includes:
Further, there is provided according to another aspect of the present invention, a printing method of a printing device for performing a printing by a plurality of printing steps, the printing method including:
According to the present invention, a first printing unit performs printing on a printing medium by a first printing step, and a cutting unit cuts a portion whereon printing is completed as a printing medium strip. Since the next printing is performed by the first printing unit in parallel with printing being performed by the second printing unit on the printing medium strip by a second printing step, printing times can be reduced. In this case, the first printing unit and the second printing unit do not conduct their printing loads to each other. Therefore, there is an effect that printing quality is not deteriorated. Further, there is an effect that the printing time can be reduced more by suitably arranging each unit.
The printer 100 houses a recording paper 200 (one example of a printing medium) wound up in a roll in an unshown recording paper housing unit.
The grip roller 115 includes two rollers, a lower roller fixed to a main body of the printer 100 in a manner rotatable in F-R direction, and an upper roller corresponding to the lower roller and rotatably fixed to the main body of the printer 100. The lower roller is connected to an unshown stepping motor (one example of a drive source), and is rotated by a drive force of the stepping motor. The lower roller is rotated for an arbitrary rotational angle by control of the control unit 190 over the stepping motor. Further, by keeping the stepping motor in an excitation state, it is possible to stop rotation of the lower roller and fix the lower roller. The upper roller can be freely rotated, which rotates corresponding to the rotation of the lower roller.
The grip roller 115 nips the recording paper 200 by holding the recording paper 200 at a nip position R1 between the upper roller and the lower roller. By rotating the grip roller 115 in F direction, the nipped recording paper 200 can be conveyed in A direction (paper-ejection direction). By rotating the grip roller 115 in R direction, the nipped recording paper 200 can be conveyed in B direction (recording-paper returning direction). The grip roller 115 can convey the recording paper 200 in either A direction or B direction at a fixed speed. Further, by stopping the rotation, it is possible to immovably fix the recording paper 200.
The color recording unit 120 includes a supply reel 121, a take-up reel 122, a thermal head 124 and a platen roller 125. The color recording unit 120 performs a color recording (printing) in Y (yellow), M (magenta) and C (cyan) on the recording paper 200 at a printing position P1.
The supply reel 121 and the take-up reel 122 are rotatably fixed to the color recording unit 120.
The supply reel 121 and the take-up reel 122 connect to an unshown driving device, and rotate by a drive force of the driving device.
The thermal head 124 is fixed to the color recording unit 120 in a manner movable in D-D′ direction. The thermal head 124 is moved by an unshown driving device. When performing printing, the thermal head 124 moves in D′ direction to press against the recording paper 200. Meanwhile, when not performing printing, the thermal head 124 moves in D direction and is retracted from the recording paper 200.
The platen roller 125 is fixed to the main body of the printer 100 in a manner rotatable in F-R direction. The platen roller 125 is freely rotatable, and rotates corresponding to the move of the recording paper 200. The platen roller 125 holds the recording paper 200 from the reverse side when the thermal head 124 presses against the recording paper 200, which allows for stable printing.
The first cutter 130 has upper and lower two blades and cuts the recording paper 200 at a cutting position C1 under control of the control unit 190.
The overcoat recording unit 140 includes a supply reel 141, a take-up reel 142, a thermal head 144 and a platen roller 145. The overcoat recording unit 140 performs an overcoat process (printing) on an image formed (recorded or printed) by the color recording unit 120 at a printing position P2 on the recording paper 200.
A conveyance roller 155 (conveyance roller pair) includes two rollers, a lower roller fixed to the main body of the printer 100 in a manner rotatable in F-R direction, and an upper roller corresponding to the lower roller and rotatably fixed to the main body of the printer 100. The lower roller is connected to an unshown stepping motor, and is rotated by a drive force of the stepping motor. The lower roller is rotated for an arbitrary rotational angle by control of the control unit 190 over the stepping motor. Further, by keeping the stepping motor in an excitation state, it is possible to stop rotation of the lower roller and fix the lower roller. The upper roller can be freely rotated, and rotates corresponding to the rotation of the lower roller.
The conveyance roller 155 nips the recording paper 200 by holding the recording paper 200 at a nip position R2 between the upper roller and the lower roller. By rotating the conveyance roller 155 in F direction, the nipped recording paper 200 is conveyed in A direction. By rotating the conveyance roller 155 in R direction, the nipped recording paper 200 can be conveyed in B direction. Further, it is possible to immovably fix the recording paper 200 by stopping the rotation.
The second cutter 160 includes upper and lower two blades and cuts the recording paper 200 at a cutting position C2 under control of the control unit 190.
The paper-ejection roller 175 includes two rollers, a lower roller fixed to the main body of the printer 100 in a manner rotatable in F-R direction, and an upper roller corresponding to the lower roller and rotatably fixed to the main body of the printer 100. The lower roller is connected to an unshown stepping motor, and is rotated by a drive force of the stepping motor. The lower roller is rotated for an arbitrary rotational angle by control of the control unit 190 over the stepping motor. Further, it is possible to stop the rotation and fix the lower roller by keeping the stepping motor in an excitation state. The upper roller can be freely rotated, and rotates according to the rotation of the lower roller.
The paper-ejection roller 175 nips the recording paper 200 by holding the recording paper 200 between the upper roller and the lower roller. By rotating the paper-ejection roller 175 in F direction, the nipped recording paper 200 can be conveyed in A direction. By rotating the paper-ejection roller 175 in R direction, the nipped recording paper 200 can be conveyed in B direction. Further, it is possible to immovably fix the recording paper 200 by stopping the rotation.
Each of the units is arranged in order of the recording paper housing unit, the grip roller 115, the color recording unit 120, the first cutter 130, the overcoat recording unit 140, the conveyance roller 155, the second cutter 160, and the paper-ejection roller 175, in A direction.
Next, detailed explanations of operations at the time of printing are presented. Operations of the printer 100 are based on four steps of a color printing step, a cutting step, an overcoat process step, and a trimming step.
In S501, the take-up reel 122 winds the ink sheet 320 thereon to orient its starting position to a point from which printing in Y (yellow) can be performed.
In S502, the grip roller 115 rotates in F direction to convey the recording paper 200 in A direction.
In S503, the control unit 190 determines whether or not the recording paper 200 reaches a printing starting position. When the recording paper 200 has not reached the printing starting position, S502 is repeated. When the recording paper 200 reaches the printing starting position, the flow proceeds to S504.
In S504, the grip roller 115 stops to fix the recording paper 200.
In S505, an unshown driving device moves the thermal head 124 in D′ direction to make the thermal head 124 press against the recording paper 200.
In S507, it is determined whether or not the recording paper 200 reaches a printing ending position. When the recording paper 200 has not reached the printing ending position, S506 is repeated. When the recording paper 200 reaches the printing ending position, the flow proceeds to S508.
In S509, it is determined whether or not printing is completed in three primary colors. When the printing in three primary colors is not completed, S501 through S508 are repeated.
In S601, the grip roller 115 rotates in F direction to convey the recording paper 200 in A direction.
In S603, the grip roller 115 and the conveyance roller 155 stop and fix the recording paper 200.
In S604, the first cutter 130 is activated to cut the recording paper 200. This allows the recording paper 200 to be detached a fore-end portion (recording paper 201, as one example of a printing medium strip) whereon the color printing has been completed from an unprinted portion (recording paper 200).
In S701, the take-up reel. 142 winds the ink sheet 340 thereon to its starting position for printing.
In S702, the conveyance roller 155 rotates in F direction to convey the recording paper 201 in A direction.
In S704, the conveyance roller 155 stops to fix the recording paper 201.
In S705, the thermal head 144 moves in D′ direction to press against the recording paper 201.
In S707, it is determined whether or not the recording paper 201 reaches a printing ending position. When the recording paper 201 has not reached the printing ending position, S506 is repeated. When the recording paper 201 reaches the printing ending position, the flow proceeds to S708.
In S801, the conveyance roller 155 rotates in F direction to convey the recording paper 201 in A direction.
In S803, the conveyance roller 155 stops to fix the recording paper 201.
In S804, the second cutter 160 is activated to cut off a margin at the fore-end of the recording paper 201.
In S805, the conveyance roller 155 rotates in F direction to convey the recording paper 201 in A direction.
In S806, the control unit 190 determines whether or not the recording paper 201 reaches a tail-end trimming position. When the recording paper 201 has not reached the tail-end trimming position, S805 is repeated. When the recording paper 201 reaches the tail-end trimming position, the flow proceeds to S807.
In S808, the second cutter 160 is activated to cut off the margin at the tail end of the recording paper 201.
Next, it is explained operations in a case in which the printer 100 continuously performs printing on plural pieces.
In S51 in
The thermal head 124 performs printing while the grip roller 115 rotates in R direction to convey the recording paper 200 in B direction (
In S61 in
In S71 in
The thermal head 144 moves in D′ direction and to press against the recording paper 201 before the cutting process in S61 (
In S81 in
The second cutter 160 is activated to cut a fore-end margin of the recording paper 201 (
Printing on the first piece is completed as stated above. The aforementioned processes have only to be completed before color printing on a second piece is completed. Furthermore, the step for cutting the tail-end margin can be performed after overcoat process on the second piece is started.
The color recording unit 120 performs printing on the second piece in parallel with the overcoat process step and the trimming step for the first piece.
Then, in S92 in
In S52 in
The thermal head 124 moves in D′ direction to press against the recording paper 200 before the cutting process in S61 (
Since the color printing on the second piece is performed in parallel with the overcoat process on the first piece, there is an effect that the printing speed is fast.
Further, since contents of the processes are different, the most suitable printing speeds may be different between the color printing and the overcoat printing. The recording paper 200 is cut by the first cutter 130 so that printing speeds of the two processes need not be the same. Therefore, printing under the most suitable conditions is possible, which allows for high-quality printing.
In S92 in
In S72 in
The thermal head 144 performs the overcoat printing while the conveyance roller 155 and the grip roller 115 rotate in F direction to convey the recording paper 200 in A direction (
In S82 in
The conveyance roller 155 and the grip roller 115 rotate in F direction to convey the recording paper 200 in A direction. The paper-ejection roller 175 also rotates in F direction, and conveys the recording paper 200 passed over from the conveyance roller 155 in A direction (
In S93 in
As shown above, in the printing on the last one piece, the overcoat process and the trimming process are directly performed without performing the cutting step, so that there is an effect that the printing speed becomes faster.
Further, the portion to be cut off as a tail-end margin is not detached from the recording paper 200. Therefore, the portion can be used in the next printing (as a fore-end margin), and it is made possible to use resources effectively.
Next, it is explained operations in the printer 100 in a case of performing printing on only one piece.
In S51 in
The thermal head 124 performs printing while the grip roller 115 rotates in R direction to convey the recording paper 200 in B direction (
In S72 in
The thermal head 144 performs the overcoat printing while the conveyance roller 155 and the grip roller 115 rotate in F direction to convey the recording paper 200 in A direction (
In S82 in
The conveyance roller 155 and the grip roller 115 rotate in F direction to convey the recording paper 200 in A direction. The paper-ejection roller 175 also rotates in F direction, and conveys the recording paper 200 passed over from the conveyance roller 155 in A direction (
In S93 in
Thus, even in a case of performing printing only on one piece, the cutting step is not performed, so that there is an effect that the printing speed becomes faster.
In the present embodiment as shown above, when the number of pieces to be printed is only one, the printing time can be reduced in comparison with a case of activating the first cutter 130 by not performing the cutting operation of the recording paper 200 by the first cutter 130.
The details of the operations in the printer 100 according to the present embodiment are not limited to what described above, which may be realized by other methods.
The marks can be printed on the adverse side of the recording paper. It may be possible to have the marks printed by the color recording unit 120 at the time of performing the first printing, not printed beforehand.
Further, the reflective sensor 180 can be installed at another position on a conveyance path of the recording paper 200.
In the example as described above, each unit is suitably arranged so that the recording papers 200 and 201 need not be conveyed after preceding steps are completed and at the time of proceeding to next steps.
Thus, since the time taken for paper feeding operation for conveying the recording paper 200 can be shortened, there is an effect that the printing speed as a whole becomes faster.
However, in some cases, an ideal arrangement as mentioned above is impossible due to restrictions such as a size of each unit.
With the configuration as mentioned above, the printing speed becomes slower, but each unit can be arranged in a more flexible manner. Therefore, there is an effect such as reduction of production costs and miniaturization of the device as a whole.
The length (=Lb) between X3 and X4 in
Further, X7 can be at the same position as X2. It is also possible to have X8 positioned at the same position as X3 or X4.
As described above, by establishing the color recording unit 120 for performing the color recording and the overcoat recording unit 140 for performing the overcoat recording separately, and by cutting the recording paper 200 by the first cutter 130 provided between the color recording unit 120 and the overcoat recording unit 140 after color recording ends, it is possible to perform the color recording on a second piece at the color recording unit 120, and the overcoat process on a color-recorded image on the first piece at the overcoat recording unit simultaneously without being affected by load variations in each of the recording units. Therefore, a printing time for the second or later piece can be shortened without deteriorating printing quality due to the load variations.
Further, it is so configured that the color recording unit 120 for performing the color recording and the overcoat recording unit 140 for performing the overcoat recording are installed separately, and the recording paper 200 is conveyed in the recording-paper returning direction (B direction) at the color recording unit 120, and the cut recording paper 201 is conveyed in the paper-ejection direction (A direction) at the overcoat recording unit 140. Thus, even when different conveyance speeds are set in each recording unit, the recording papers 200 and 201 do not interfere with each other in the conveyance path, and it is possible to have the color recording unit 120 for performing the color recording and the overcoat recording unit 140 for performing the overcoat recording carry out processes in an asynchronous and independent manner. Therefore, it becomes possible to set the most suitable recording condition for each recording unit.
Further, by setting the distance from the color recording starting position (printing position) P1, which is the nip position between the thermal head 124 and the platen roller 125, to the cutting position C1 of the recording paper 200 by the first cutter 130 the same length as the sum of the length of the recording image plane Li and the length of the fore-end margin of the recording image plane Lf, and by setting the distance from the first cutter 130 to the overcoat recording starting position (printing position) P2, which is the nip position between the thermal head 144 and the platen roller 145, the same as the sum of the length of the recording image plane Li and the length of the tail-end of the recording image plane Lb, it is possible to perform the color recording operation on a second piece and the overcoat recording operation on a first piece immediately after the cutting operation of the recording paper 200 is completed by the first cutter 130 without the need of an unnecessary conveyance operation of recording papers. Therefore, it is possible to perform effective printing operations and reduce the printing time.
In the present embodiment, the position of the recording paper 200 is adjusted by managing (counting) the conveyance amount of the grip roller 115. However, as shown in
The printing device (printer 100) according to the present embodiment includes:
the first printing unit (color recording unit 120) to perform printing on the printing medium (recording paper 200);
the cutting unit (first cutter 130) to cut the portion (recording paper 201) on which the printing is performed by the first printing unit (color recording unit 120) from the printing medium (recording paper 200); and
the second printing unit (overcoat recording unit 140) to perform printing on the printing medium strip (recording paper 201) cut by the cutting unit (the first cutter 130).
The first printing unit (color recording unit 120) performs the printing on the printing medium (recording paper 200) in parallel with the printing on the printing medium strip (recording paper 201) performed by the second printing unit (overcoat recording unit 140).
The printing device (printer 100) further includes:
the main body of the printing device;
the first rotation unit (grip roller 115) to nip the printing medium (recording paper 200) between the rollers rotatably fixed to the main body of the printing device, and to convey the printing medium (recording paper 200) by rotating the rollers; and
the second rotation unit (conveyance roller 155) to nip the printing medium (recording paper 200) and the printing medium strip (recording paper 201) between the rollers rotatably fixed to the main body of the printing device, and to convey the printing medium (recording paper 200) and the printing medium strip (recording paper 201) by rotating the rollers,
wherein the first printing unit (color recording paper 120) performs the printing on the printing medium (recording paper 200) at the prescribed position (P1) between the first nip position (R1) at which the first rotation unit (grip roller 115) nips the printing medium (recording paper 200) and the second nip position (R2) at which the second rotation unit (conveyance roller 155) nips the printing medium (recording paper 200) and the printing medium strip (recording paper 201),
wherein the cutting unit (first cutter 130) cuts the printing medium (recording paper 200) at the prescribed position (C1) between the first printing position (P1) at which the first printing unit (color recording unit 120) performs the printing on the printing medium (recording paper 200) and the second nip position (R2),
and wherein the second printing unit (overcoat recording unit 140) performs the printing on the printing medium strip (recording paper 201) at the prescribed position (P2) between the cutting position (C1) at which the cutting unit (first cutter 130) cuts the printing medium (recording paper 200) and the second nip position (R2).
The first rotation unit (grip roller 115) conveys the printing medium (recording paper 200) to the prescribed printing starting position by rotating the rollers in the prescribed direction (F direction), conveys the printing medium (recording paper 200) in a prescribed printing ending position by rotating the rollers in the direction (R direction) against the prescribed direction after the first printing unit (color recording unit 120) starts printing on the printing medium (recording paper 200), conveys the printing medium (recording paper 200) to the prescribed cutting position by rotating the rollers in the prescribed direction (F direction) after the first printing unit (color recording unit 120) completes the printing on the printing medium (recording paper 200), and conveys the printing medium (recording paper 200) to the prescribed printing ending position by rotating the rollers in the direction (R direction) against the prescribed direction after the cutting unit (first cutter 130) cuts the printing medium (recording paper 200) and the first printing unit (color printing unit 120) starts the next printing on the printing medium (recording paper 200).
The first rotation unit (grip roller 115) further conveys the printing medium (recording paper 200) to the prescribed cutting position by rotating the rollers in the prescribed direction (F direction) after the first printing unit (color recording unit 120) performs the last printing on the printing medium (recording paper 200), and conveys the printing medium (recording paper 200) to the prescribed printing ending position by rotating the rollers in the prescribed direction after the second printing unit (overcoat recording unit 140) starts printing on the printing medium (recording paper 200).
The second rotation unit (conveyance roller 155) nips the printing medium (recording paper 200) conveyed by the first rotation unit (grip roller 115) between the rollers, conveys the printing medium (recording paper 200) to the prescribed cutting position by rotating the rollers in the prescribed direction (F direction), and conveys the printing medium strip (recording paper 201) to the prescribed printing ending position by rotating the rollers in the prescribed direction (F direction) after the cutting unit (first cutter 130) cuts the printing medium (recording paper 200) and the second printing unit (overcoat recording unit 140) starts printing on the printing medium strip (recording paper 201).
The conveyance rollers 116 and 156 each include two rollers, which are a lower roller fixed to the main body of the printer 100 in a manner rotatable in F-R direction, and an upper roller corresponding to the lower roller and rotatably fixed to the main body of the printer 100. Each of the lower rollers is connected to an unshown stepping motor, and is rotated by a drive force of the stepping motor. The lower rollers rotate for arbitrary rotational angles by control of the control unit 190 over the stepping motors. Further, it is possible to stop their rotations and fix the lower rollers by keeping the stepping motors in an excitation state. The upper rollers can be freely rotated, and are rotated corresponding to the rotations of the lower rollers.
The conveyance rollers 116 and 156 nip the recording paper 200 by holding the recording paper 200 at nip positions R3 and R4 between the upper rollers and the lower rollers. By rotating the conveyance rollers 116 and 156 in F direction, the nipped recording paper 200 can be conveyed in A direction. By rotating the conveyance rollers 116 and 156 in R direction, the nipped recording paper 200 can be conveyed in B direction. Further, by stopping the rotations, it is possible to immovably fix the recording paper 200.
Next, detailed explanations of operations during printing are presented.
In S621, the grip roller 115 and the conveyance rollers 116 and 156 rotate in F direction to convey the recording paper 200 in A direction.
In S622, the control unit 190 determines whether or not the recording paper 200 reaches the cutting position. When the recording paper 200 has not reached the cutting position, S621 is repeated. When the recording paper 200 reaches the cutting position, the flow proceeds to S623.
In S623, the grip roller 115 and the conveyance rollers 116, 156 and 155 stop to fix the recording paper 200.
In S624, the first cutter 130 is activated to cut the recording paper 200.
At this time, the recording paper 200 is secured by the conveyance rollers 116 and 156 at the positions just ahead and just behind the cutting position C1. By keeping the stepping motors for driving the conveyance rollers 116 and 156 in an excitation (HOLD) state, the conveyance rollers 116 or 156 are not moved by the load of the cutting operation and are put under restraint.
In the present embodiment, the conveyance rollers 116 and 156 positioned at a relatively short distance nip the recording paper 200, and the first cutter 130 cuts the recording paper 200 so that there is an effect that the recording paper 200 does not slip in A-B direction, and a stable cutting operation can be performed accurately.
Also in the color printing step, the overcoat process step and the trimming step, the conveyance rollers 116 and 156 operate in combination with the other rollers so that the recording paper 200 can be conveyed more accurately.
The conveyance roller 116 conveys the recording paper 200 at the same speed as the grip roller 115. Further, the conveyance roller 156 conveys the recording papers 200 and 201 at the same speed as the conveyance roller 155 and the paper-ejection roller 175.
Further, by installing the conveyance rollers 116 and 156, limitations on deployment of each unit are eased.
According to the present embodiment, the conveyance roller 156 is included, so that when the distance between C1 and R4 and the distance between R4 and R2 are shorter than the distance between X1 and X4, the recording paper 201 can be conveyed by having the recording paper 201 being nipped by the conveyance roller 156 at time of cutting, being conveyed by the conveyance roller 156 at the time of overcoat process, and being transferred to the conveyance roller 155 during the overcoat process step.
In S641, the grip roller 115 and the conveyance rollers 116 and 156 rotate in F direction to convey the recording paper 200 in A direction.
In S642, the control unit 190 determines whether or not the recording paper 200 reaches the cutting position. When the recording paper 200 has not reached the cutting position, S641 is repeated. When the recording paper 200 reaches the cutting position, the flow proceeds to S643.
In S643, the grip roller 115 and the conveyance rollers 116, 156 and 155 stop to fix the recording paper 200.
In S644, the conveyance roller 116 rotates in R direction, and the conveyance roller 156 rotates in F direction. The conveyance rollers 116 and 156 pull the recording paper 200 at approximately the same power, so that the recording paper 200 is not conveyed and rests under tension.
In S645, the first cutter 130 is activated to cut the recording paper 200.
As shown above, by configuring the conveyance rollers 116 and 156 to pull the recording paper 200 from the left and right sides as well as to fix the recording paper 200 at the time of cutting, the recording paper 200 is cut under tension. Therefore, cutting error does not occur due to a slack in the recording paper 200, and the cutting paper 200 can be cut clearly and accurately.
At this time, to prevent the recording paper 200 from being broken, a mechanism for restricting the power to be applied to the recording paper 200 becomes necessary. It may be possible to have a structure for weakening the friction force as shown above. In this case, a slip is occurred between the recording paper 200 and the conveyance roller 116 or 156.
Alternatively, it may be possible to have a structure that a torque limiter is installed in a drive force transmission mechanism between the conveyance roller 116 or 156 and the unshown stepping motors, so that a drive force more than a prescribed value is not applied to the conveyance roller 116 or 156. This makes the conveyance rollers 116 and 156 succumb to the friction forces with the recording paper 200 and stop rotating.
In this case, the conveyance forces and the circumferential speeds of the recording paper in the conveyance rollers 116 and 156 are set approximately the same. This allows the conveyance forces of the conveyance rollers 116 and 156 to be in well balance. In the conveyance rollers 116 and 156, a torque larger than a set value in the torque limiter occurs, and the torque limiter spins free. Therefore, both the conveyance rollers 116 and 156 stop. By configuring in this manner, a slip does not occur between the recording paper 200 and the conveyance roller 116 or 156, and the recording paper 200 gets under tension at the cutting position C1.
By configuring in this manner, there is a possibility that conveyance by the conveyance rollers 116 and 156 is not always accurate. However, the conveyance rollers 116 and 156 are only supplemental, and in the color recording unit 120 wherein accurate conveyance is required, the grip roller 115 handles conveyance of the recording paper 200, so that the printing quality is not deteriorated.
The printing device (printer 100) according to the present embodiment, further includes:
the third rotation unit (conveyance roller 116) to nip the printing medium (recording paper 200) between the rollers rotatably fixed to the main body of the printing device between the first printing position (P1) and the cutting position (C1), and to convey the printing medium (recording paper 200) by rotating the rollers; and
the fourth rotation unit (conveyance roller 156) to nip the printing medium (recording paper 200) and the printing medium strip (recording paper 201) between the rollers rotatably fixed to the main body of the printing device between the second printing position (P2) at which the second printing unit (overcoat recording unit 140) performs the printing on the printing medium strip (recording paper 201) and the cutting position (C1), and to convey the printing medium (recording paper 200) and the printing medium strip (recording paper 201) by rotating the rollers.
The third rotation unit (conveyance roller 116) nips the printing medium (recording paper 200) conveyed by the first rotation unit (grip roller 115) between the rollers, conveys the printing medium (recording paper 200) to the prescribed cutting position by rotating the rollers in the prescribed direction (F direction), and fixes the printing medium (recording paper 200) at the prescribed cutting position by stopping the rollers,
The third rotation unit (conveyance roller 116) nips the printing medium (recording paper 200) conveyed by the first rotation unit (grip roller 115) between the rollers, conveys the printing medium (recording paper 200) to the prescribed cutting position by rotating the rollers in the prescribed direction (F direction), and pulls the printing medium (recording paper 200) at a prescribed force by rotating the rollers in the direction (R direction) against the prescribed direction,
Among the above, the grip roller 115, the color recording unit 120, the first cutter 130, the second cutter 160 and the paper-ejection roller 175 are the same as those explained in the first embodiment using
The overcoat recording unit 140 includes the supply reel 141, the take-up reel 142, the thermal head 144, and the platen roller 145 (one example of the second rotation unit), and performs the overcoat process (printing) on the recording paper 200 at the printing position P2.
The platen roller 145 is fixed to the main body of the printer 100 in a manner rotatable in F-R direction. The platen roller 145 holds the recording paper 200 from the reverse side when the thermal head 144 presses against the recording paper 200, which allows for a stable printing.
The platen roller 145 nips the recording paper 200 with the thermal head 144 while the thermal head 144 moves in D′ direction and is kept pressing against the recording papers 200 and 201. By rotating the platen roller 145 in F direction, the nipped recording paper 200 can be conveyed in A direction. By rotating the platen roller 145 in R direction, the nipped recording paper 200 can be conveyed in B direction. Further, it is possible to immovably fix the recording paper 200 by stopping the rotation.
Thus, the platen roller 145 according to the present embodiment also has the function of the conveyance roller 155 (the second rotation unit) described in the first embodiment.
Next, detailed explanations of operations at the time of printing are presented.
In S661, the grip roller 115 rotates in F direction to convey the recording paper 200 in A direction (
In S 663, the grip roller 115 and the platen roller 145 stop. The grip roller 115 nips and fixes the recording paper 200 (
Alternatively, it may possible to have the thermal head 144 move in D′ direction to press against the recording paper 200 before the grip roller 115 and the platen roller 145 stop.
In S665, the first cutter 130 is activated to cut the recording paper 200 (
Then, the overcoat process step is performed on the cut recording paper 201, and the color printing step is performed on the recording paper 200.
In the first embodiment, the distance between the printing position P2 of the overcoat recording unit 140 and the nip position R2 of the conveyance roller 155 is quite large. The distance between P2 and R2 cannot be shorter than the length between X1 and X2 on the recording paper 200 in
As shown above, by allowing the platen roller 145 to have the function as the second rotation unit as well, it is possible to co-locate the printing position P2 of the overcoat recording unit 140 and the nip position R2 of the platen roller 145. That is to say, there is an effect to reduce the size of the fore-end margin (between X1 and X2, which is equal to Lf).
By configuring the platen roller 145 to convey the recording papers 200 and 201, the conveyance accuracy is reduced in comparison with a case of conveyance by the conveyance roller 155.
The printing device (printer 100) according to the present embodiment, further includes:
the main body of the printing device; and
the first rotation unit (grip roller 115) to nip the printing medium (recording paper 200) between the rollers rotatably fixed to the main body of the printing device, and to convey the printing medium (recording paper 200) by rotating the rollers,
wherein the first printing unit (color recording unit 120) performs the printing on the printing medium (recording paper 200) at the prescribed position (P1) between the first nip position (R1) at which the first rotation unit (grip roller 115) nips the printing medium (recording paper 200) and the second printing position (P2) at which the second printing unit (overcoat recording unit 140) performs the printing on the printing medium strip (recording paper 201),
wherein the cutting unit (the first cutter 130) cuts the printing medium (recording paper 200) at the prescribed position (C1) between the first printing position (P1) at which the first printing unit (color recording unit 120) performs the printing on the printing medium (recording paper 200) and the second printing position (P2),
and wherein the second printing unit (overcoat recording unit 140) further nips the printing medium (recording paper 200) and the printing medium strip (recording paper 201) between the printing head (thermal head 144) and the platen roller 145 rotatably fixed to the main body of the printing device, and conveys the printing medium (recording paper 200) and the printing medium strip (recording paper 201) by rotating the platen roller 145.
The second printing unit (overcoat recording unit 140) nips the printing medium (recording paper 200) conveyed to the prescribed cutting position by the first rotation unit (grip roller 115) between the printing head (thermal head 144) and the platen roller 145, and after the cutting unit (the first cutter 130) cuts the printing medium (recording paper 200), performs printing on the printing medium strip (recording paper 201) while conveying the printing medium strip (recording paper 201) to the prescribed printing ending position by rotating the platen roller 145.
As stated below, in the present embodiment, a sufficient space is secured between the printing position P1 of the color recording unit 120 and the nip position R3 of the conveyance roller 116 to keep a slack in the recording paper. Similarly, a sufficient space is secured between the nip position R4 of the conveyance roller 156 and the printing position P2 of the overcoat recording unit 140.
Next, detailed explanations of operations at the time of printing are presented.
In S681 in
In S682 in
In S683 in
In S684 in
In S685 in
In S686 in
In S687 in
In S688 in
In this case, in S683 through S685, it may be possible to have the thermal head 144 press against the recording paper 200 while having the grip roller 115 and the conveyance rollers 116 and 156 continue rotating without stopping.
As shown above, by having each roller rotate and stop at different timings, a slack is generated in the recording paper 200 between the nip positions, and each unit can be arranged in a more flexible manner.
Further, it is possible to start the overcoat process step without waiting for the cutting step to end.
At this time, the speed the platen roller 145 conveys the recording paper 200 needs not coincide with the conveyance speeds of the conveyance rollers 116 and 156, and can be slower than the conveyance speeds of the conveyance rollers 116 and 156. In this case, the recording paper 200 slackens between R4 and P2 so that differences of the conveyance speeds are absorbed.
Further, when the conveyance speed of the platen roller 145 is faster instead, it is only necessary to start the overcoat process step after a sufficient slack is generated between R4 and P2.
Therefore, there are effects that it is possible to convey the recording paper 200 in an appropriate speed for the overcoat process, and perform high-quality printing.
The color printing step is started after X6 on the recording paper 200 reaches the printing position P1 of the color recording unit 120. The cutting operation in S688 can be performed after the recording paper 200 reaches the color printing position. Otherwise, the cutting operation can be performed without waiting for the recording paper 200 to reach the color printing position.
Further, it may be possible to generate the slack on the side of the color recording unit 120 between R3 and C1, not between P1 and R3.
In this case, during the cutting operation in S688, the conveyance roller 116 needs to be stopped. It may be also possible to have the grip roller 115 stopped during the cutting operation. Otherwise, it may be also possible to absorb the slack generated between P1 and R3 during the cutting operation by having the grip roller 115 keep rotating as it is, and the conveyance roller 116 rotate slightly faster than the grip roller 115 after restarting conveyance.
Further, in the present example, the blades of the first cutter 130 are used as a guide for the recording paper 200. However, it may be also possible to provide a movable guide in D-D′ direction apart from this.
As mentioned above, it is so configured that the sufficient spaces wherein the recording paper 200 slackens are provided between the color recording starting position (printing position) P1 and the cutting position C1 of the first cutter 130, and between the cutting position C1 of the first cutter 130 and the overcoat recording starting position (printing position) P2, the conveyance roller 116 is installed just ahead the first cutter 130 on the upstream side in the conveyance path, and the conveyance roller 156 is similarly installed just behind the first cutter 130 on the downstream side in the paper-ejection direction (A direction), to control the conveyance to have the recording paper 200 slackened between P1 and C1 and between C1 and P2, it is possible to support the printing operation in a case in which the length of the recording image plane Li is long.
The features of the printer described above is as follows.
The printer whereon the color recording unit (the first printing unit) for recording a plurality of colors and forming an image on a recording paper, and an aftertreatment unit (the second printing unit) for performing an aftertreatment such as application of an overcoat on the recording paper on which color recording has been performed, are arranged along the conveyance direction of the recording paper (recording medium) includes the recording paper cutting unit (cutting unit) for cutting the recording paper on the conveyance path of the recording paper between the color recording unit and the aftertreatment unit.
Further, the printer is characterized in that, after completion of the image forming operation by the color recording unit, the recording paper cutting unit cuts the recording paper, and then the color recording unit performs an image forming operation on a second piece at the same time the aftertreatment unit performs aftertreatment on the recording paper whereon the image has been formed, among the cut recording paper.
Further, the printer includes a control means to perform aftertreatment by the aftertreatment unit on the recording paper whereon the image has been formed without activating the recording paper cutting unit after the image forming operation by the color recording unit ends, when the number of pieces to be recorded is one.
Further, the printer is characterized in that as the recording paper, a roll paper is used.
Further, the printer includes two pairs of conveyance rollers (the third rotation unit and the fourth rotation unit) to nip the recording paper therebetween and convey the recording paper on an upstream side and a downstream side with respect to the recording paper cutting unit in the conveyance direction of the recording paper, and a means to stop the rotations of the two pairs of the conveyance rollers and keep the conveyance rollers in a stopped state.
Further, the printer includes a means to control the pair of the conveyance rollers on the upstream side to rotate in a direction to reverse the recording paper upstream, and the pair of the conveyance rollers on the downstream side to rotate in a direction to convey the recording paper to the downstream side with respect to the conveyance direction of the recording paper, of the two pairs of the conveyance rollers for nipping the recording paper therebetween and conveying the recording paper on the upstream side and the downstream side with respect to the recording paper cutting unit in the conveyance direction of the recording paper, when the recording paper is cut by the recording paper cutting unit.
Further, the printer is characterized in that the color recording unit is installed upstream in the conveyance direction of the recording paper, while the aftertreatment unit is installed downstream in the conveyance direction of the recording paper, and the recording paper is conveyed in the direction to return to the upstream side with respect to the conveyance direction of the recording paper at the time of the image forming operation by the color recording unit, while the recording paper is conveyed to the downstream side in the conveyance direction at the time of the aftertreatment operation by the aftertreatment unit.
Further, the printer is characterized in that in a recording image plane on the recording paper formed by the color recording unit, when referring to a margin on the downstream side as a fore-end margin, and a margin on the upstream side as a tail-end margin in the conveyance direction of the recording paper, the distance between the color recording unit and the recording paper cutting unit is set as long as the sum of a length of the recording image plane and a length of the fore-end margin, and the distance between the recording paper cutting unit and the aftertreatment unit is set as long as the sum of the length of the recording image plane and a length of the tail-end margin.
Further, the aftertreatment unit includes the thermal head to perform the aftertreatment on the image-formed portion on the recording paper by producing an increase in temperature by heat, and a platen roller opposing to the thermal head of the aftertreatment unit. A pair of the conveyance rollers for color recording which conveys the recording paper is installed upstream of the color recording unit. When the color recording operation is performed, the recording paper is conveyed by the pair of the conveyance rollers for color recording, and when the aftertreatment operation is performed, the recording paper is nipped between the thermal head and the platen roller, and is conveyed by driving the platen roller.
Further, the printer is characterized in that the spaces for keeping a slack in the recording paper are provided on the conveyance path of the recording paper between the color recording unit and the recording paper cutting unit, and between the paper cutting unit and the aftertreatment unit, wherein the recording paper is conveyed to the aftertreatment unit after the image forming by the color recording unit ends, and the recording paper is cut by the recording paper cutting means after the recording paper is slackened in the spaces for keeping the slack in the recording paper.
Further, the printer is characterized in that a second recording paper cutting unit (margin cutting unit) for cutting margins of the recording paper is provided on the downstream side of the aftertreatment unit.
Further, the color recording unit consists of an ink ribbon composed of a plurality of colors, and the thermal head for color recording which produces an increase in temperature of the ink ribbon by heat and performs image forming, whereas the aftertreatment unit consists of an ink ribbon whereto an overcoat agent is applied, and the thermal head for aftertreatment which produces an increase in temperature of the ink ribbon by heat to have it applied to the image-formed portion on the recording paper.
The third rotation unit (conveyance roller 116) nips the printing medium (recording paper 200) conveyed by the first rotation unit (grip roller 115) between the rollers, conveys the printing medium (recording paper 200) to the prescribed cutting position by rotating the rollers in the prescribed direction (F direction) and fixes the printing medium,
The second printing unit (overcoat recording unit 140) performs printing on the printing medium (recording medium 200) while the printing head (thermal head 144) and the platen roller 145 nip the printing medium (recording paper 200) conveyed to the prescribed printing starting position by the first rotation unit (grip roller 115) and conveys the printing medium (recording paper 200) to the prescribed printing ending position by rotating the platen roller 145,
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Description of the Reference Numerals
100: Printer, 115: Grip roller, 116, 155 and 156: Conveyance roller, 120: Color recording unit, 121 and 141: Supply reel, 122 and 142: Take-up reel, 124 and 144: Thermal head, 125 and 145: Platen roller, 130: The first cutter, 160: The second cutter, 175: Paper-ejection roller, 190: Control unit, 200 and 201: Recording paper, 320 and 340: Ink sheet.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2005-216970 | Jul 2005 | JP | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/JP2006/313226 | 7/3/2006 | WO | 00 | 11/20/2007 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2007/013263 | 2/1/2007 | WO | A |
| Number | Name | Date | Kind |
|---|---|---|---|
| 4560990 | Sue et al. | Dec 1985 | A |
| 5452959 | Oka | Sep 1995 | A |
| 5956067 | Isono et al. | Sep 1999 | A |
| 20020075375 | Yamakawa et al. | Jun 2002 | A1 |
| 20020171726 | Ishii et al. | Nov 2002 | A1 |
| 20030019424 | Takekoshi et al. | Jan 2003 | A1 |
| 20030234847 | Takekoshi et al. | Dec 2003 | A1 |
| 20040165927 | Fisher et al. | Aug 2004 | A1 |
| Number | Date | Country |
|---|---|---|
| 7-125270 | May 1995 | JP |
| 11-300993 | Nov 1999 | JP |
| 11300993 | Nov 1999 | JP |
| 2000-052578 | Feb 2000 | JP |
| 2000052578 | Feb 2000 | JP |
| 2003-054044 | Feb 2003 | JP |
| 2003-266801 | Sep 2003 | JP |
| 2004216732 | Aug 2004 | JP |
| Number | Date | Country | |
|---|---|---|---|
| 20090116893 A1 | May 2009 | US |
