Patent Application
20120025452
1. Field of the Invention
The present invention relates to a sheet post-processing apparatus that performs post-processing for a sheet on which an image has been formed in an image forming apparatus such as a copier, a printer, or a composite device.
2. Description of the Related Art
In recent years, there is developed a sheet post-processing apparatus, which is disposed adjacent to the sheet discharge section of an image forming apparatus main body for the purpose of performing post-processing for a sheet on which an image has been formed in the image forming apparatus. The sheet post-processing apparatus performs post-processing for a sheet, such as sorting of printed sheets discharged from the image forming apparatus or stapling thereof. The sheet post-processing apparatus performs post-processing for a succeeding sheet after completion of the post-processing for a preceding sheet. In order for the sheet post-processing apparatus to wait until the post-processing for a preceding sheet has been completed, an apparatus in which a retreating path is formed in the middle of a path reaching to a stapler is disclosed in Japanese Patent Publication (Kokoku) No. H6-99070.
However, in the case where the retreating path is formed in the middle of a path reaching to a stapler as described above, the length of a sheet path extending from the discharge section of the image forming apparatus main body to the stapler is increased. This may prevent size reduction of the entire apparatus.
In light of the above, an apparatus in which a processing tray for use in staple processing and a standby tray which retains a sheet to be supplied to the processing tray in a standby mode are vertically provided to reduce the length of the sheet path has been proposed. In this apparatus, a sheet is dropped from the standby tray and is supplied onto the processing tray. Further, such an apparatus has a sheet discharge tray on which a sheet discharged from the standby tray or processing tray is placed and a rear end guide that supports the rear end of the sheet on the discharge tray between the discharge tray.
However, if deformation of a sheet occurs when the sheet is discharged from the standby tray or processing tray to the sheet discharge tray, the sheet is caught by the rear side which may result in sheet jamming. Further, if the rear guide contacts a sheet when the sheet is aligned on the processing tray, the rear guide serves as resistance to adversely affecting the sheet alignment performance.
Further, in some cases, the sheet discharge tray is slid on the side surface of the post-processing apparatus main body, with the sheet placed thereon, so as to be disposed adjacent to the position of the standby tray or processing tray. If the rear end of the sheet on the discharge tray is slipped from the upper end of the rear guide at this time, the sheet may be fed back to the processing tray or standby tray side.
To cope with the above problems, a small-sized sheet post-processing apparatus that prevents sheet jamming from occurring when the sheet is discharged from the standby tray or processing tray to the discharge tray without adversely affecting the sheet alignment performance made in the processing tray has been desired. Further, a sheet post-processing apparatus that prevents the sheet placed on the discharge tray from being fed back to the backside at the time of the slide of the discharge tray has been desired.
An aspect of the present invention is to provide a sheet post-processing apparatus in which a sheet is dropped from the standby tray to thereby be supplied to the processing tray and the length of a sheet path is reduced. It is desirable for the sheet post-processing apparatus to prevent sheet jamming from occurring when the sheet is discharged to the discharge tray, to exhibit an excellent sheet alignment performance on the processing tray, and to prevent the sheet placed on the discharge tray from reversely being fed to the processing tray side at the time of the slide of the discharge tray.
According to an embodiment of the present invention, a sheet post-processing apparatus is characterized by containing: a standby tray for making a sheet discharged from an image forming apparatus stand by, a processing tray arranged under the standby tray, a processing mechanism for performing post-processing for the sheet, a sheet discharge tray for loading the sheet, the sheet discharge tray being slidably arranged adjacent to the standby tray or the processing tray on the downstream side with respect to the standby tray and processing tray in the sheet discharge direction and tilted such that the discharge direction front end of the sheet is positioned higher than the discharge direction rear end thereof, and a rear end supporting mechanism arranged on the discharge direction rear end side and allows the rear end of the sheet on the sheet discharge tray to be brought into contact therewith, wherein the center area upper end of the rear end supporting mechanism is positioned lower than the peripheral area upper end of the rear end supporting mechanism.
Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
The sheet post-processing apparatus 7 has a pair of entrance rollers 22 have an upper roller 22a and lower roller 22b that feed a sheet P, on which an image has been formed by the image forming apparatus 5 and which is discharged by a pair of discharge rollers 6, into the sheet post-processing apparatus 7. The entrance rollers 22 are driven by an entrance roller motor 26. Between the entrance rollers 22 and a standby tray 10, a sheet path ceiling 36 for leading the sheet P to a pair of sheet feed rollers 24 is installed. Under the standby tray 10, a processing tray 12 for loading the sheets P dropped and supplied from the standby tray 10 is arranged.
While the sheets P are stapled by a stapler 14 which is a processing mechanism for performing post-processing, the processing tray 12, supports the sheets P to be loaded in an aligned state. As shown in
The upper vertical alignment roller 38a and lower vertical alignment roller 38b align a plurality of sheets P dropped and supplied from the standby tray 10 in the vertical direction which is a feeding direction. The upper and lower vertical alignment rollers 38a and 38b serve as bundle feeding rollers for holding a sheet bundle T after stapled and taking out it from the stapler 14. The upper vertical alignment roller 38a is driven by a vertical alignment upper roller motor 40. The lower vertical matching roller 38b is driven by a vertical alignment lower roller motor 42.
At the position opposite to the rear end of each of the sheets P which have been dropped and supplied from the standby tray 10 onto the processing tray 12, a paddle 44 is arranged. The paddle 44, which is configured to be rotatable, aligns vertically the uppermost sheet P loaded on the processing tray 12. The paddle 44, as shown in
At the end of the processing tray 12 on the side of the stapler 14, a stopper 45 for making contact with the rear end of each of the sheets P and vertically aligning the rear end position is arranged. Almost at the center of the processing tray 12, a conveyor belt 50 serving as a sheet discharge mechanism is installed. The conveyer belt 50 feeds the sheet bundle T, which is stapled and taken out from the stapler 14 by the upper and lower vertical alignment rollers 38a and 38b, to first or second sheet discharge tray 16 or 18. To the conveyer belt 50, a feed pawl 50a for hooking the rear end of the sheet bundle T is attached. The first or second sheet discharge tray 16 or 18 is configured to be slidable on the side surface of the sheet post-processing apparatus 7 in the vertical direction.
At the end of the processing tray 12 on the side of the sheet discharge tray 16 or 18, pluralities of alignment rollers 61 are arranged. The alignment rollers 61 are supported by a shaft 60 and contact the bottom surface of the sheet P. The alignment rollers 61 have a pair of center alignment rollers 61a which are disposed symmetrically with respect to the conveyor belt 50 and a pair of side alignment rollers 61b which are disposed on both sides of the center alignment rollers 61a.
The alignment rollers 61 are rotated in g direction (first direction) denoted by the arrow in
The standby tray 10 can drop and supply the sheets P onto the processing tray 12 and also can feed the sheets P toward the first or second sheet discharge tray 16 or 18. The standby tray 10 is so tilted as to support the sheets P such that the position of the front ends of the sheets P becomes higher than that of the rear ends thereof. As shown in
The standby tray 10 has pinch rollers 10e which hold the sheet P on the standby tray 10 between themselves and standby tray rollers 28 provided for aligning the sheet P and feed it toward the sheet discharge tray 16 or 18. Note that, without providing the pinch roller 10e, it is possible to feed the sheet P on the standby tray 10 toward the sheet discharge tray 16 or 18 only by the standby tray rollers 28. The standby rollers 28 are controlled by a standby tray roller drive source 30 in terms of their vertical movement and rotated by a standby tray roller motor 32.
Between the standby tray 10 and the processing tray 12, horizontal alignment plates 47a and 47b shown in
The first or second sheet discharge tray 16 or 18 is so tilted as to support the sheets P such that the position of the front ends of the sheets P becomes higher than that of the rear ends thereof. One of the first and second sheet discharge trays 16 and 18 is selected, and the selected one is moved up and down by a sheet discharge drive section 52. The first or second sheet discharge tray 16 or 18 is moved up and down up to almost the same height as that of the sheet discharge section of the standby tray 10 or processing tray 12 when loading the sheets P to improve the consistency of the sheets P to be discharged. That is, the sheets P are not disturbed due to a difference in vertical positions.
At the position below the sheet discharge section of the processing tray 12 and between the processing tray 12 and sheet discharge trays 16, 18, a shutter 86 which is a rear end supporting mechanism for supporting the rear end of the sheet P discharged onto the sheet discharge trays 16 and is provided. As shown in
When the sheet P is discharged from the processing tray 12 onto the first or second sheet discharge tray 16 or 18, the movable portions 88 are contracted to overlap the stationary portions 87, as shown in
In a state where the movable portions 88 are contracted, center upper portions 86a, which are upper ends of the center area that faces center alignment rollers 61a of the shutter 86, are located lower than the peripheral upper portions 86b which are upper ends of the peripheral area. This configuration allows the center alignment rollers 61a to be completely exposed from the upper end of the shutter 86. Therefore, the center portion of the sheet P that has run over the processing tray 12 and hung there from, contacts the center alignment rollers 61a without fail.
When the first or second sheet discharge tray 16 or 18 is slid, the movable portions 88 of the shutter 86 are extended. At this time, the movable portions 88 of the shutter 86 are slid in i direction denoted by the arrow in
When the electromagnetic clutch is turned ON while the belt motor 62 drives the alignment rollers 61 in h direction denoted by the arrow in
Next, the operation of the present invention will be described. When the sheet is discharged from the processing tray 12 of the sheet post-processing apparatus 7, the shutter 86 is located below the sheet discharge section of the processing tray 12, as shown in
After an image has been formed on a sheet P in the image forming apparatus 5, the sheet P on which an image has been formed is discharged by the sheet discharge roller 6 of the image forming apparatus 5 to the sheet post-processing apparatus 7. When receiving the sheet P, the sheet post-processing apparatus 7 performs a different operation, depending on a case of performing the post-processing of the sheet P or a case of performing no post-processing. Or the sheet post-processing apparatus 7 performs a different operation, depending on a case of that the preceding sheet P is in execution of the post-processing or that is finished it.
When the post-processing is not to be performed, the sheet P which has been fed from the entrance rollers 22 to the sheet feed rollers 24 through the sheet path ceiling 36 is fed to the standby tray 10 by the paper feed rollers 24. Then, the sheet P is moved down onto the standby tray 10 and is fed while being held between the standby tray rollers 28 rotated in the direction of the arrow f and pinch rollers 10e of the standby tray 10 to be discharged onto the first sheet discharge tray 16 from the sheet discharge section of the standby tray 10.
At this time, the sheet discharge tray 16 is slid from substantially the same height position as the sheet discharge section of the processing tray 12 in the direction of the arrow j up to substantially the same height position as the sheet discharge section of the standby tray 10, as denoted by the dotted line in
As a result, the sheet P on the sheet discharge tray 16 which has been discharged from the standby tray 10 is supported by the extended movable portions 88 of the shutter 86 at the rear end thereof. The movable portions 88 are extended by the ON operation of the electromagnetic clutch while the belt motor 62 rotates the alignment rollers 61 in the direction of the arrow h. At this time, the shutter 86 is extended such that the center upper portions 86a become lower than the peripheral upper portions 86b. Therefore, even if the sheet P is discharged from the standby tray 10 in a state where its center portion in the feeding direction is deformed, the deformed portion is not brought into contact with the shutter 86, thereby avoiding jamming of the sheet P.
In this way, on the first sheet discharge tray 16, sheets P directly discharged from the standby tray 10 are sequentially loaded. The first sheet discharge tray 16 is arranged in a tilted manner such that the front end of the sheet P is positioned higher than the rear end thereof, so that, the preceding sheet P loaded on the first sheet discharge tray 16 is not pressed out by making contact with the front end of the succeeding sheet P. Namely, the discharged sheet P is sequentially loaded on the first sheet discharge tray 16 unless the order is disturbed. Even if the preceding sheet P is pressed by the succeeding sheet P and is slightly displaced, the sheet P drops by its own weight to the shutter 86 side. Therefore, the rear ends of the sheets P are brought into contact with the shutter 86 on the first sheet discharge tray 16 and thereby the alignment of the sheets P is accomplished.
When the first sheet discharge tray 16 is full, the first and second sheet discharge trays 16 and 18 are slid in the direction of the arrow j so that the sheet P is discharged onto the second sheet discharge tray 18. The movable portions 88 of the shutter 86 are further extended before the slide of the first and second sheet discharge trays 16 and 18 to close the sheet discharge section of the standby tray 10.
Therefore, it is possible to prevent the sheet P placed on the first sheet discharge tray 16 from reversely being fed to the standby tray 10 when the first sheet discharge tray 16 passes the front face of the standby tray 10. After the second sheet discharge tray 18 is slid up to the position corresponding to the sheet discharge section of the standby tray 10, the movable portions 88 are contracted so that the upper portions 86a and 86b of the shutter 86 are positioned below the sheet discharge section of the standby tray 10 to open the sheet discharge section of the standby tray 10. In this state, the sheet P can be discharged from the standby tray 10 onto the second sheet discharge tray 18.
Next, a case where staple processing which is a post-processing is to be performed and no preceding sheets P in execution of the staple processing remain on the processing tray 12 will be described. At this time, the standby tray 10 slides and moves the tray members 10a and 10b respectively up to the positions indicated by the dotted lines in
At the time of dropping and supplying, the upper vertical alignment roller 38a is shifted upward. Both sides of the sheet P drop in contact with the horizontal alignment plates 47a and 47b and are aligned in the horizontal direction. The rear end of the first sheet P dropped and supplied onto the processing tray 12 is placed on the receiving portion 44a of the paddle 44, and the front end thereof is contact with the alignment rollers 61. Then, the paddle 44 rotates in the direction of the arrow o, drops the rear end of the sheet P from the receiving portion 44a, and beats down it onto the processing tray 12 by the beating portion 44b. Furthermore, the paddle 44 feeds the sheet P in the direction of the arrow q by the feeding portion 44c. At the same time, the sheet P is fed toward the stopper 45 by the alignment rollers 61 rotated in the direction of the arrow g, and the rear end of the sheet of paper P is brought into contact with the stopper 45, and the vertical alignment of the sheet P is accomplished.
When the sheet P is vertically aligned on the stopper 45 side, the front end of the sheet P hangs outward from the sheet post-processing apparatus 7 as denoted by the dotted line in
However, the vertical positions of the center upper portions 86a of the shutter 86 are lower than those of the peripheral upper portions 86b disposed on both sides of the center upper portions 86a, so that the central alignment rollers 61a are completely projected upward from the center upper portions 86a of the shutter 86. That is, at the center area, the sheet P is contact with the center alignment rollers 61a without fail without being affected by a resistance of the shutter 86. Particularly, in the case of the sheet P having a large size such as A3 (JIS standard), the center portion thereof in the feeding direction is easily deformed. However, even if the center portion of the sheet P has been deformed, the sheet P can surely receive a feeding force from the center alignment rollers 61a without being affected by a resistance of the shutter 86. Thus, the sheet P obtains a satisfactory vertical alignment by the alignment rollers 61.
After that, the second or subsequent sheet P is dropped onto the processing tray 12 with both sides thereof brought into contact with the horizontal alignment plates 47a and 47b for horizontal alignment. The second or subsequent sheet P is, after the rear end thereof is dropped onto the receiving portion 44a of the paddle 44, fed to the stopper 45 sides only by the rotation of the paddle 44. The rotation of the paddle 44 brings the rear end of the sheet P into contact with the stopper 45, thereby accomplishing the vertical alignment of the sheet P. The vertical alignment of the sheet P on the processing tray 12 may be performed by moving up and down the vertical alignment roller 38a for each alignment operation and by rotating it in the opposite direction to the arrow r.
In this way, the sheet P on which an image has been formed is loaded directly on the processing tray 12 from the sheet feed rollers 24 while sequentially being aligned in the horizontal direction and vertical direction. When the sheets P reach a predetermined number, the stapler 14 staples the sheets P on the processing tray 12 at a desired position and bundles them to form the sheet bundle T. Thereafter, the upper vertical alignment roller 38a is moved down onto the sheet bundle T. The sheet bundle T is then held between the upper vertical alignment roller 38a rotated in the direction of the arrow r and the lower vertical alignment roller 38b rotated in the direction of the arrow s and is fed toward the first sheet discharge tray 16.
When the rear end of the sheet bundle T passes the upper and lower vertical alignment rollers 38a and 38b, it is hooked by the feed pawl 50a of the conveyor belt 50 rotated in the direction of the arrow t and is sent to the first sheet discharge tray 16. At this time, the alignment rollers 61 are rotated in the direction of the arrow h. As a result, the sheet bundle T is fed to the sheet discharge tray 16 or 18 side by feeding forces of both the conveyer belt 50 and alignment rollers 61. Since the conveyer belt 50 and alignment rollers 61 use the same shaft 60, they are always driven at the same time. That is, the feeding forces supplied from the conveyer belt 50 and alignment rollers 61 are continued to be applied to the sheet bundle T. As a result, the sheet bundle T is smoothly and stably fed by means of both the conveyer belt 50 and alignment rollers 61 onto the sheet discharge tray 16 or 18.
The first sheet discharge tray 16 is arranged in a tilted manner and therefore the front end of the sheet P is positioned higher than the rear end thereof, so that the preceding sheet P sent to the first sheet discharge tray 16 is not pressed out by making contact with the front end of the succeeding sheet bundle T. Further, even if the preceding sheet bundle T is slightly displaced by the succeeding sheet P, since the first sheet discharge tray 16 is arranged in a tilted manner, the sheet bundle T drops by its own weight on the shutter 86 side and is loaded on the first sheet discharge tray 16 with the rear end thereof aligned at the point of contact with the shutter 86.
Next, a case where the staple processing which is a post-processing is to be performed and preceding sheets P in execution of the staple processing remain on the processing tray 12 will be described. At this time, the standby tray 10 slides and moves the tray members 10a and 10b from the position indicated by the dashed line in
After the sheets P are loaded on the standby tray 10, the standby tray rollers 28 are moved down onto the standby tray 10 and are rotated in the opposite direction of the direction of the arrow f. As a result, the sheets P are sent toward the standby stoppers 10c and 10d and are vertically aligned with the rear end of the sheets P brought into contact with the standby stoppers 10c and 10d.
Since the standby tray 10 is arranged in a tilted manner, a force in the direction of the standby stoppers 10c and 10d is applied to the sheets P by the own weight. Thus, even if, for example, the succeeding sheet P is fed from the sheet feed rollers 24 in a state that it is curled convexly and is fed to the standby tray 10, the preceding sheet P loaded on the standby tray 10 is not pressed out by making contact with the front end of the succeeding sheet P. Namely, the fed sheet P is sequentially loaded on the standby tray 10 unless the order is disturbed. Further, even if the preceding sheet P is pressed by the succeeding sheet P and is slightly displaced, since the standby tray 10 is arranged in a tilted manner, the sheet P drops by its own weight down to the position where the rear end thereof is brought into contact with the standby stoppers 10c and 10d and is loaded on the standby tray 10 with the rear end aligned.
During this period, when the preceding sheet P on the processing tray 12 is discharged on the side of the first sheet discharge tray 16 and the processing tray 12 becomes free, the standby tray 10 slides and moves the tray members 10a and 10b respectively up to the positions indicated by the dotted lines in
The lower side sheet P of the two sheets P dropped onto the processing tray 12 is sent in the direction of the arrow q by the lower vertical alignment roller 38b rotated in the opposite direction of the direction of the arrow s, and the rear end of the sheet P is brought into contact with the stopper 45, and the vertical alignment of the sheet P is accomplished. The upper side sheet P of the two sheets P dropped onto the processing tray 12 is sent in the direction of the arrow q by the upper vertical alignment roller 38a rotated in the opposite direction of the direction of the arrow r, and the rear end of the sheet P is brought into contact with the stopper 45, and the vertical alignment of the sheet P is accomplished. Thereafter, the upper vertical alignment roller 38a is shifted upward.
The third and subsequent sheets P discharged from the image forming apparatus 5 are directly dropped and supplied onto the processing tray 12 from between the tray members 10a and 10b without standing by on the standby tray 10. Thereafter, the third and subsequent sheets P are sequentially aligned on the sheets P loaded earlier on the processing tray 12 by the paddle 44.
When the sheets P loaded on the processing tray 12 reach a predetermined number, the sheets P are stapled by the stapler 14 to form a sheet bundle T. Thereafter, the sheet bundle T is fed toward the first sheet discharge tray 16 by the upper and lower vertical alignment rollers 38a and 38b. When the rear end of the sheet bundle T passes the upper and lower vertical alignment rollers 38a and 38b, it is hooked by the feed pawl 50a of the conveyor belt 50 and is sent to the first sheet discharge tray 16. At this time, the alignment rollers 61 are rotated in the direction of the arrow h. As a result, the sheet bundle T is fed onto the sheet discharge tray 16.
Since the conveyer belt 50 and alignment rollers 61 use the same shaft 60, they are always driven at the same time. That is, the feeding forces supplied from the conveyer belt 50 and alignment rollers 61 are continued to be applied to the sheet bundle T. As a result, the sheet bundle T is smoothly and stably fed by means of both the conveyer belt 50 and alignment rollers 61 onto the sheet discharge tray 16 or 18.
When the first sheet discharge tray 16 is full while the sheet bundles T are sequentially discharged, subsequent sheet bundles T are discharged onto the second sheet discharge tray 18 in place of the first sheet discharge tray 16. In order for the sheet bundle T to be discharged onto the second sheet discharge tray 18, the first and second sheet discharge trays 16 and 18 are slid in the direction of the arrow j. At this time, the movable portions 88 of the shutter 86 are extended in the i direction denoted by the arrow in
Therefore, it is possible to prevent the sheet bundle T placed on the first sheet discharge tray 16 from reversely being fed to the processing tray 12 or standby tray 10 when the first sheet discharge tray 16 passes the sheet discharge section of the processing tray 12 or standby tray 10. After the second sheet discharge tray 18 is slid up to the position corresponding to the sheet discharge section of the processing tray 12, the movable portions 88 of the shutter 86 are contracted to the position shown in
In this embodiment having such a configuration, when the staple processing is to be performed after image forming and the preceding staple processing is not finished on the processing tray 12, the standby tray 10 installed above the processing tray 12 waits for the succeeding sheets P. Thereafter, after the processing tray 12 becomes free, the sheets P standing by on the standby tray 10 are dropped and supplied and then are moved onto the processing tray 12. Therefore, the practical feeding path from the standby tray 10 to the processing tray 12 in the sheet post-processing apparatus 7 can be shortened and the sheet post-processing apparatus can be miniaturized.
Further, the center upper portions 86a of the shutter 86, which support the rear end of the sheet P discharged onto the sheet discharge tray 16 or 18 are located lower than the peripheral upper portions 86b. Therefore, the sheet P can contact the center alignment rollers 61a without fail on the processing tray 12 without being obstructed by the shutter 86. As a result, the vertical alignment of the sheet P on the processing tray 12 can be achieved. Further, even when the movable members 88 of the shutter 86 are extended up to the position corresponding to the sheet discharge section of the standby tray 10, the center upper portions 86a are located lower than the peripheral upper portions 86b. Therefore, even if the sheet P is discharged from the standby tray 10 in a state where its center portion in the feeding direction is deformed, the deformed portion is not brought into contact with the shutter 86, thereby avoiding jamming of the sheet P.
Further, in the present embodiment, the alignment rollers 61 and conveyer belt 50 have the same shaft 60. That is, the feeding forces supplied from the conveyer belt 50 and alignment rollers 61 are continued to be applied to the sheet bundle T. As a result, the sheet bundle T is effectively be discharged onto the sheet discharge tray 16 or 18. Further, the movable members 88 of the shutter 86 are extended while the sheet discharge trays 16 and 18 are slid to close the sheet discharge sections of the processing tray 12 and/or standby tray 10. Therefore, it is possible to prevent the sheet P placed on the first sheet discharge tray 16 from reversely being fed to the processing tray 12 or standby tray 10 while the first sheet discharge tray 16 is slid.
The present invention is not limited to the above embodiment and various modifications are possible within the scope of the invention. For example, a method of dropping and supplying the sheet P from the standby tray to the processing tray is not limited to one based on the slide movement but may be implemented by a rotational movement. Further, the post-processing is not limited to the staple processing, but may be any processing, such as hole-punching processing in sheets, as far as it is post-processing to be applied to the sheet.
The values of the width of the center area of the rear end supporting mechanism and difference in the vertical position between the center area and peripheral area thereof is not limited, and they may be set to any value as far as they fall within a range where the rear end of the sheet on the sheet discharge tray can appropriately be supported, where the alignment rollers can be contact with the back surface of the sheet without fail, and where the deformed portion is not brought into contact with the rear end supporting mechanism when the sheet is discharged onto the sheet discharge tray. Further, a drive means for moving the movable sections of the rear end supporting mechanism may have any configuration.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2005-372752 | Dec 2005 | JP | national |
This application is a Continuation of application Ser. No. 11/616,076 filed on Dec. 26, 2006, the entire contents of which are incorporated herein by reference. This application is based upon and claims the benefit of priority from prior Japanese Patent Application No. 2005-372752 filed on Dec. 26, 2005, the entire contents of which are incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| Parent | 11616076 | Dec 2006 | US |
| Child | 13216450 | US |
