Patent Application
20190382229
Japanese Patent Application No. 2018-112414 filed on Jun. 13, 2018, including description, claims, drawings, and abstract, the entire disclosure of which is incorporated herein by reference in its entirety.
The present invention is directed to finishers, non-transitory computer-readable recording media each storing a program for controlling transportation of media sheets, and methods for controlling transportation of media sheets. In particular, the present invention is directed to finishers capable of putting an insertion sheet between cut media sheets given by a division of a media sheet by cutting, non-transitory computer-readable recording media each storing a program for controlling transportation of media sheets, to be executed in the finisher, and methods for controlling transportation of media sheets.
Some of recent printing devices like MFPs (multi-functional peripherals) are equipped with an imposition function that arranges and prints multiple pages per sheet of print media, and a cutting function that cuts sheets of print media so as to divide each sheet into multiple small-size sheets. To save printing cost, there have been proposed techniques to, by using such a printing device, print two pages per sheet of print media and then cut each printed sheets into halves, rather than printing pages on sheets of print media one page by one page.
As an example of the techniques to divide media sheets by cutting, Japanese Unexamined Patent Publication (JP-A) No. 2007-079051 discloses the following technique about a cutting device for cutting sheets of recording material on each of which multiple images were formed, into desired-size pieces. After cutting each printed sheet of the recording material into multiple pieces, the cutting device outputs a piece or pieces on each of which an image was formed, and keeps the remaining blank piece or pieces into a certain space in the cutting device.
As another example, JP-A No. 2005-350215 discloses the following image forming apparatus. The image forming apparatus includes a sheet supply storing a stack of media sheets, a feeder and a printing unit, where the printing unit receives media sheets fed by the feeder from the sheet supply one sheet by one sheet, and then performs predetermined image-forming processing on the received media sheets. The image forming apparatus further includes a sheet transportation path for transporting media sheets to the printing unit, disposed between the sheet supply and the printing unit. The sheet transportation path includes a first transportation path, a second transportation path, and a path switch for switching the path to be used for transporting media sheets, to one of the first transportation path or the second transportation path. On the second transportation path, a sheet cutter, a cut sheet container and a cut sheet feeder are disposed in series. The sheet cutter cuts media sheets fed from the sheet supply, into predetermined-size sheets (cut sheets), and the cut sheet container stores the cut sheets, and the cut sheet feeder feeds the cut sheets stored in the cut sheet container, toward the printing unit.
In processing of dividing media sheets into small-size cut sheets and binding the cut sheets to create a booklet, or in processing of dividing media sheets into small-size cut sheets and making a stack of the cut sheets, a demand for putting insertion sheets loaded on a tray for the insertion sheets, between the cut sheets, may arise. The insertion sheets are media sheets not to be subjected to print processing (media sheets for which there is no need to perform print processing), such as media sheets printed by an external printing device in advance, interleaving sheets or blank sheets, and an insertion sheet is the general term for these sheets. In conventional printing devices, cut media sheets are transported successively along a sheet path, and it was difficult for such printing devices to put insertion sheets between cut media sheets.
The present invention is directed to finishers, non-transitory computer-readable recording media each storing a program for controlling transportation of media sheets, and methods for controlling transportation of media sheets, which allows an finisher to properly put an insertion sheet fed from a tray for the insertion sheets, between cut media sheets given by a division of each media sheet by cutting.
A finisher reflecting one aspect of the present invention comprises: a sheet transporter that transports media sheets along a sheet path; a sheet cutter that is disposed on the sheet path and that receives printed media sheets that were subjected to print processing by a print engine and divides each of the printed media sheets into two or more cut media sheets that line in the sheet path, by cutting each of the printed media sheets in a direction crossing the sheet path; a sheet inserter that inserts insertion sheets not to be subjected to print processing, into the sheet path; a sheet stacker that stacks the cut media sheets and the insertion sheets transported by the sheet transporter thereon; a sheet buffer that is disposed on a branch line branching off from the sheet path at a branch position on the sheet path between the sheet cutter and the sheet stacker; and a controller that controls transportation of media sheets with the sheet transporter. The controller performs the following operations. The operations include setting a sheet insertion mode to one of a pre-sheet insertion mode and a post-sheet insertion mode, where the sheet insertion mode is a mode for use in inserting an insertion sheet to be put between cut media sheets given by a division of one of the printed media sheets, into the sheet path by the sheet inserter, the pre-sheet insertion mode is a mode in which the insertion sheet is inserted into the sheet path so that the insertion sheet passes through the sheet cutter before the sheet cutter divides the one of the printed media sheets, and the post-sheet insertion mode is a mode in which the insertion sheet is inserted into the sheet path so that the insertion sheet passes through the sheet cutter after the sheet cutter divides the one of the printed media sheets. The operations further include, according to the sheet insertion mode, controlling transportation of cut media sheets given by a division of one of the printed media sheets with the sheet cutter and an insertion sheet inserted into the sheet pass by the sheet inserter, by causing the sheet transporter to transport either of a part of the cut media sheets and the insertion sheet into the sheet buffer and change the order of the cut media sheets and the insertion sheet being transported along the sheet path so that the insertion sheet is positioned between the cut media sheets.
A non-transitory computer-readable recording medium reflecting one aspect of the present invention stores a program for controlling transportation of media sheets, to be executed in a finisher. The finisher includes: a sheet transporter that transports media sheets along a sheet path; a sheet cutter that is disposed on the sheet path and that receives printed media sheets that were subjected to print processing by a print engine and divides each of the printed media sheets into two or more cut media sheets that line in the sheet path, by cutting each of the printed media sheets in a direction crossing the sheet path; a sheet inserter that inserts insertion sheets not to be subjected to print processing, into the sheet path; a sheet stacker that stacks the cut media sheets and the insertion sheets transported by the sheet transporter thereon; a sheet buffer that is disposed on a branch line branching off from the sheet path at a branch position on the sheet path between the sheet cutter and the sheet stacker, and a controller that controls transportation of media sheets with the sheet transporter. The program comprises instructions which, when executed by the controller, cause the controller to perform the following operations. The operations comprise setting a sheet insertion mode to one of a pre-sheet insertion mode and a post-sheet insertion mode, where the sheet insertion mode is a mode for use in inserting an insertion sheet to be put between cut media sheets given by a division of one of the printed media sheets, into the sheet path by the sheet inserter, the pro-sheet insertion mode is a mode in which the insertion sheet is inserted into the sheet path so that the insertion sheet passes through the sheet cutter before the sheet cutter divides the one of the printed media sheets, and the post-sheet insertion mode is a mode in which the insertion sheet is inserted into the sheet path so that the insertion sheet passes through the sheet cutter after the sheet cutter divides the one of the printed media sheets. The operations further comprise, according to the sheet insertion mode, controlling transportation of cut media sheets given by a division of one of the printed media sheets with the sheet cutter and an insertion sheet inserted into the sheet pass by the sheet inserter, by causing the sheet transporter to transport either of a part of the cut media sheets and the insertion sheet into the sheet buffer and change the order of the cut media sheets and the insertion sheet being transported along the sheet path so that the insertion sheet is positioned between the cut media sheets.
A method reflecting one aspect of the present invention is a method for controlling transportation of media sheets, for use in a finisher. The finisher includes: a sheet transporter that transports media sheets along a sheet path; a sheet cutter that is disposed on the sheet path and that receives printed media sheets that were subjected to print processing by a print engine and divides each of the printed media sheets into two or more cut media sheets that line in the sheet path, by cutting each of the printed media sheets in a direction crossing the sheet path; a sheet inserter that inserts insertion sheets not to be subjected to print processing, into the sheet path; a sheet stacker that stacks the cut media sheets and the insertion sheets transported by the sheet transporter thereon; a sheet buffer that is disposed on a branch line branching off from the sheet path at a branch position on the sheet path between the sheet cutter and the sheet stacker, and a controller that controls transportation of media sheets with the sheet transporter. The method comprises setting, by the controller, a sheet insertion mode to one of a pre-sheet insertion mode and a post-sheet insertion mode, where the sheet insertion mode is a mode for use in inserting an insertion sheet to be put between cut media sheets given by a division of one of the printed media sheets, into the sheet path by the sheet inserter, the pre-sheet insertion mode is a mode in which the insertion sheet is inserted into the sheet path so that the insertion sheet passes through the sheet cutter before the sheet cutter divides the one of the printed media sheets, and the post-sheet insertion mode is a mode in which the insertion sheet is inserted into the sheet path so that the insertion sheet passes through the sheet cutter after the sheet cutter divides the one of the printed media sheets. The method further comprises, according to the sheet insertion mode, controlling, by the controller, transportation of cut media sheets given by a division of one of the printed media sheets with the sheet cutter and an insertion sheet inserted into the sheet pass by the sheet inserter, by causing the sheet transporter to transport either of a part of the cut media sheets and the insertion sheet into the sheet buffer and change the order of the cut media sheets and the insertion sheet being transported along the sheet path so that the insertion sheet is positioned between the cut media sheets.
The advantages and features provided by one or more embodiments of the invention will become more fully understood from the detailed description given hereinbelow and the appended drawings which are given by way of illustration only, and thus are not intended as a definition of the limits of the present invention, wherein:
Hereinafter, one or more embodiments of the present invention will be described with reference to the drawings. However, the scope of the invention is not limited to the illustrated embodiments.
As indicated in BACKGROUND, to save printing cost, there have been proposed techniques to print two pages per media sheet and then cut each of the printed media sheets into halves, rather than printing pages on media sheets of print media one page by one page. In processing of dividing media sheets into small-size cut sheets and binding the cut sheets to create a booklet, or in processing of dividing media sheets into small-size cut sheets and making a stack of the cut sheets, a demand for putting insertion sheets loaded on a tray for the insertion sheets, between the cut sheets, may arise. The insertion sheets are media sheets to be subjected to no print processing. Examples of the insertion sheets include media sheets printed by an external printing device in advance, interleaving sheets and blank sheets, and an insertion sheet is the general term for these sheets. In conventional printing devices, cut media sheets are transported successively along a sheet path, and it was difficult for the printing devices to put insertion sheets between cut media sheets.
In view of that, the following device, like a finisher, capable of dividing a media sheet into multiple cut media sheets by cutting and of putting an insertion sheet between the cut media sheets, is provided as one embodiment of the present embodiment. The device (finisher) includes a sheet transporter that transports media sheets along a sheet path, a sheet cutter, a sheet inserter, a sheet stacker, a sheet buffer and a controller. The sheet cutter is disposed on the sheet path so as to receive printed media sheets that were subjected to print processing by a print engine and divide each of the printed media sheets into two or more cut media sheets that line in the sheet path, by cutting each of the printed media sheets in a direction crossing the sheet path (the cross-machine direction). The sheet inserter is disposed along the sheet path so as to insert insertion sheets not to be subjected to print processing (media sheets for which there is no need to perform print processing), into the sheet path, where examples of the insertion sheets include media sheets printed by an external printing device in advance, interleaving sheets and blank sheets. The sheet stacker is disposed so as to receive the cut media sheets and the insertion sheets transported by the sheet transporter and stack the received sheets thereon. The sheet buffer is disposed on a branch line branching off from the sheet path at a branch position on the sheet path between the sheet cutter and the sheet stacker. The controller controls transportation of media sheets with the sheet transporter. That is, the controller sets a sheet insertion mode to one of a pre-sheet insertion mode and a post-sheet insertion mode. The sheet insertion mode is a mode for use in inserting an insertion sheet to be put between cut media sheets given by a division of one of the printed media sheets, into the sheet path by the sheet inserter. The pre-sheet insertion mode is a mode in which the insertion sheet is inserted into the sheet path so that the insertion sheet passes through the sheet cutter before the sheet cutter divides the one of the printed media sheets. The post-sheet insertion mode is a mode in which the insertion sheet is inserted into the sheet path so that the insertion sheet passes through the sheet cutter after the sheet cutter divides the one of the printed media sheets. According to the sheet insertion mode, the controller controls the transportation of cut media sheets given by a division of one of the printed media sheets with the sheet cutter and an insertion sheet inserted into the sheet pass by the sheet inserter, by causing the sheet transporter to transport either of a part of the cut media sheets and the insertion sheet into the sheet buffer and change the order of the cut media sheets and the insertion sheet being transported along the sheet path so that the insertion sheet is positioned between the cut media sheets. The operations allow the device to sort the sheets in the sheet path so as to place the insertions sheets at desired positions in a series or a stack of the sheets.
The controller may further calculate an interval at which the sheet transporter feeds printed media sheets to the sheet cutter, and cause the sheet transporter to feed the printed media sheets to the sheet cutter at the calculated interval. The interval may be calculated by using a time period necessary for the sheet cutter to cut one of the printed media sheets, a time period necessary for the sheet transporter to transport either of an insertion sheet inserted into the sheet pass by the sheet inserter and a part of media sheets given by a division of one of the printed media sheets with the sheet cutter (one or more end cut media sheets positioned at the most downstream position among the cut media sheets), along the sheet path into the sheet buffer, a time period necessary for the sheet transporter to return the either of the insertion sheet and the part of the cut media sheets from the sheet buffer into the sheet path, and an interval of the cut media sheets (an interval at which the sheet transporter transports the cut media sheets).
For example, in a case that the sheet insertion mode is set to the pre-sheet insertion mode, the controller may control the transportation of cut media sheets given by a division of one of the printed media sheets with the sheet cutter and an insertion sheet inserted into the sheet pass by the sheet inserter, as follows. That is, the controller may cause the sheet transporter to transport an insertion sheet into the sheet buffer and transpose a leading part of the cut media sheets (one or more leading cut media sheet positioned upstream from or leading the other cut media sheets among the cut media sheets) and the insertion sheet, being transported along the sheet path, so that the insertion sheet is positioned between the cut media sheets. In concrete terms, in a case that the sheet insertion mode is set to the pre-sheet insertion mode, the sheet transporter transports media sheets along the sheet path according to the following steps: First, the sheet transporter puts an insertion sheet from the sheet inserter into the sheet path (at an upstream position from the sheet cutter on the sheet path), and transports the insertion sheet along the sheet path into the sheet buffer to be kept therein; Second, the sheet transporter feeds a media sheet printed by a print engine to the sheet cutter, and the sheet cutter divides the printed media sheet into multiple pieces (cut media sheets) that line in the sheet path, by cutting the printed media sheet in the cross-machine direction; Third, the sheet transporter transports the leading part of the cut media sheets, along the sheet path toward the sheet stacker (or a post-processing unit); Fourth, the sheet transporter returns the insertion sheet kept in the sheet buffer into the sheet path and transports the insertion sheet along the sheet path toward the sheet stacker (or a post-processing unit), after the leading part of the cut media sheets passes through the branch position on the sheet path where the sheet path branches off and leads to the sheet buffer, and Fifth, the sheet transporter transports a succeeding part of the cut media sheets (one or more cut media sheet downstream of or following the leading part of the cut media sheets among the cut media sheets) along the sheet path toward the sheet stacker (or a post-processing unit).
On the other hand, in a case that the sheet insertion mode is set to the post-sheet insertion mode, the controller may control the transportation of cut media sheets given by a division of one of the printed media sheets with the sheet cutter and an insertion sheet inserted into the sheet pass by the sheet inserter, as follows. That is, the controller may cause the sheet transporter to transport an end part of cut the media sheets (one or more end cut media sheet positioned downstream from or following the other cut media sheets among the cut media sheets) into the sheet buffer and transpose the end part of the cut media sheets and the insertion sheet, being transported along the sheet path, so that the insertion sheet is positioned between the cut media sheets. In concrete terms, in a case that the sheet insertion mode is set to the post-sheet insertion mode, the sheet transporter transports media sheets along the sheet path according to the following steps: First, the sheet transporter feeds a media sheet printed by a print engine to the sheet cutter, and the sheet cutter divides the printed media sheet into multiple pieces (cut media sheets) that line in the sheet path, by cutting the printed media sheet in the cross-machine direction; Second, the sheet transporter transports a leading part of the cut media sheets (one or more cut media sheets upstream of or leading the end part of the cut media sheets), along the sheet path toward the sheet stacker (or a post-processing unit); Third, the sheet transporter transports the end part of the cut media sheets along the sheet path into the sheet buffer to be kept therein; Fourth, the sheet transporter puts an insertion sheet from the sheet inserter into the sheet path (at an upstream position from the sheet cutter on the sheet path), and transports the insertion sheet along the sheet path toward the sheet stacker (or a post-processing unit); and Fifth, the transporter returns the end part of the cut media sheets kept in the sheet buffer into the sheet path and transports the end part of the cut media sheets along the sheet path toward the sheet stacker (or a post-processing unit), after the insertion sheet passes through the branch position on the sheet path where the sheet path branches off and leads to the sheet buffer.
As described above, the device (finisher) according to the present embodiment includes a sheet buffer disposed on a branch line branching off from the sheet path at a branch position downstream of the sheet cutter, and is configured to transport an insertion sheet or a part of cut media sheets given by a division of a media sheet by cutting (one or more end cut media sheets among the cut media sheets), into the sheet buffer. It allows the device to put an insertion sheet between the cut media sheets given by cutting each media sheet, and to sort the cut media sheets and the insertion sheets in desired order. For example, in processing of dividing media sheets into small-size cut media sheets and binding the cut media sheets to create a booklet, it allows the device to create a booklet using insertion sheets with saving operator's time and efforts for handling the insertion sheets. In other words, it allows the device to create a booklet that is similar to a booklet created by operations to print pages on media sheets one page by one page.
In order to describe an embodiment of the present invention in more in detail, a description is given of a finisher, a non-transitory computer-readable recording medium storing a program for controlling transportation of media sheets, and a method for controlling transportation of media sheets, with reference to
As illustrated in
Client terminal 20 is a computing device like a computer or a mobile terminal, where examples of the client terminal 20 include personal computers, tablets and smartphones. Client terminal 20 is configured to send a print job to printing device 30. Client terminal 20 includes, as illustrated in
Built-in controller 21 includes CPU (Central Processing Unit) 22 as a hardware processor, and memories including ROM (Read Only Memory) 23 and RAM (Random Access Memory) 24. CPU 22 reads out control programs stored in ROM 23 or storage unit 25, loads the control programs onto RAM 24, and executes the control programs, thereby controlling operations of the components of client terminal 20. As illustrated in
Examples of OS 21a include Microsoft Windows, macOS and Android, where Microsoft and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries, macOS is a registered trademark or trademark of Apple Inc. in the United States and/or other countries, and Android is a registered trademark or trademark of Google Inc. in the United States and/or other countries. OS 11a manages application programs including applications 21b and printer driver 21c in client terminal 20 so as to function and run the application programs.
Applications 21b include, for example, an application program for creating documents, which, on sending print instructions, invokes printer driver 21c and transfers data created by one of applications 21b to printer driver 21c by being executed by CPU 22.
Printer driver 21c converts document data created by one of applications 21b into a print job in a language that printing device 30 can interpret, and sends the print job to printing device 30, by being executed by CPU 22, where examples of the print job include PDL (Page Description Language) data written in page description languages, such as PJL (Printer Job Language), PS (PostScript) and PCL (Printer Control Language); and PDF (Portable Document Format) data. When being executed, the printer driver 21c causes display unit 27 to display a print setting screen, writes print settings (such as the sizes of an original document, the number of pages to be printed, the sizes of media sheets, the number of copies to be printed, settings about a division of media sheets by cutting, settings about a use of insertion sheets, and settings for post-processing, in the present embodiment) specified on the screen into a print ticket, and adds the print ticket to the print job.
Storage unit 25 is a non-transitory computer-readable recording medium including a HDD (Hard Disk Drive) and/or a SSD (Solid State Drive), which stores programs which when being executed causes CPU 22 to control of operations of the components of client terminal 20, document data, a print job, and other data.
Network I/F unit 26 includes a NIC (Network Interface Card) and/or a modem. Network I/F unit 26 communicably connects client terminal 20 to communication network 50 so as to send a job to printing device 30.
Display unit 27 includes a display like a LCD (liquid crystal display) or an OEL (organic electroluminescence) display, so as to display various screens including document creation screens of applications 21b and a print setup screen of printer driver 21c.
Operation unit 28 includes input devices, such as a mouse and a keyboard, which allows an operator to perform various operations including operations for creating a document by using one of applications 21b and operations for configuring print settings by using printer driver 21c.
Printing device 30 is an apparatus configured to process a print job received from client terminal 20, where examples of printing device 30 include MFPs (multi-functional peripherals). Printing device 30 includes, as illustrated in
Built-in controller 31 includes CPU 32 as a hardware processor, and memories including ROM 33 and RAM 34. CPU 32 reads out control programs stored in ROM 33 or storage unit 35, loads the control programs onto RAM 34, and executes the control programs (including the program for controlling transportation of media sheets, which will be described later), thereby controlling operations of the components of printing device 30.
As illustrated in
Setting controller 31a is configured to perform the following operations. Setting controller 31a analyzes a print job, and uses print settings to judge whether instructions to divide media sheets are specified in the print job. Judging that instructions to divide media sheets are specified in the print job, setting controller 31 sets the number of cut pieces given by a division of each media sheet by cutting (the way to divide each media sheets, in other words, how many times to cut each media sheets in which direction). For example, in a case that two-in-one imposition is specified in the print job, setting controller 31a sets the number of cut media sheets to be given by a division of each media sheets, to two. Setting controller 31 further uses print settings to judge whether instructions to use insertion sheets are specified in the print job. Judging that instructions to use insertion sheets are specified in the print job, setting controller 31a configures settings about handling of insertion sheets. For example, setting controller 31a sets whether to put insertion sheets between the cut media sheets or not, and sets the sheet insertion mode to the pre-sheet insertion mode or the post-sheet insertion mode. In concrete terms, the sheet insertion mode is a mode indicating the way to insert, from sheet inserter 41, an insertion sheet to be put between cut media sheets given by a division of a printed media sheet, into the sheet path. The pre-sheet insertion mode is a mode in which the insertion sheet is inserted into the sheet path so that the insertion sheet passes through sheet cutter 42 before sheet cutter 42 divides the printed media sheet by cutting. The post-sheet insertion mode is a mode in which the insertion sheet is inserted into the sheet path so that the insertion sheet passes through sheet cutter 42 after sheet cutter 42 divides the printed media sheet by cutting.
Sheet transportation controller 31b is configured to control sheet transporter 46 to perform the following operations. In a case that the instructions to put insertion sheets between cut media sheets are specified in the print job, sheet transportation controller 31b checks the sheet insertion mode currently specified, and causes sheet transporter 46 to perform the media sheet transportation in the processes of putting media sheets from sheet feeder 39 into the sheet path, print processing in printing unit 40, inserting insertion sheets from sheet inserter 41 into the sheet path, cutting media sheets by sheet cutter 42, transporting a media sheet into sheet buffer 43, performing post-processing by post-processing unit 44, and stacking media sheets in sheet stacker 45. With the operations to control the media sheet transportation, the sheet transportation controller 31b changes the order of cut media sheets given by a division of a media sheet by sheet cutter 42 and an insertion sheet which are transported in the sheet path, so that the insertion sheet is positioned between the cut media sheets and the insertion sheet and the cut media sheets are transported toward sheet stacker 45 in the resulting order. In concrete terms, in a case that the sheet-insertion mode is set to the pre-sheet insertion mode, sheet transportation controller 31b causes sheet transporter 46 to put an insertion sheet from sheet inserter 41 into the sheet path as a starter and transport the insertion sheet so that the insertion sheet passes through sheet cutter 42 and is put into sheet buffer 43. After that, sheet transportation controller 31b causes sheet transporter 46 to feed a media sheet from sheet feeder 39 into the sheet path, causes printing unit 40 to perform print processing on the media sheet, and causes sheet cutter 42 to divide the printed media sheet into cut media sheets by cutting. Sheet transportation controller 31b then causes sheet transporter 46 to start the transportation of a leading part of the cut media sheets (one or more leading cut media sheets among the cut media sheets) toward sheet stacker 45, and after the leading part of the cut media sheets has passed through the branch position on the sheet path (the position where the sheet path branches off to sheet buffer 43), sheet transportation controller 31b causes sheet transporter 46 to return the insertion sheet kept in sheet buffer 43 into the sheet path through the branch position, and after that, to start the transportation of a succeeding part of the cut media sheets (one or more succeeding cut media sheets that follows the one or more leading cut media sheets among the cut media sheets), toward sheet stacker 45. In another case that the sheet-insertion mode is set to the post-sheet insertion mode, sheet transportation controller 31b causes sheet transporter 46 to put a media sheet from sheet feeder 39 into the sheet path as a starter, causes printing unit 40 to perform print processing on the media sheet, and causes sheet cutter 42 to divide the printed media sheet into cut media sheets by cutting. Sheet transportation controller 31b then causes sheet transporter 46 to start the transportation of a leading part of the cut medias sheets (one or more leading cut media sheets among the cut media sheets), along the sheet path toward sheet stacker 45, and then transport an end part of the cut media sheets (one or more end cut media sheets that are positioned at the most downstream position and follow the one or more leading cut media sheets among the cut media sheets), along the sheet path into sheet buffer 43. After that, sheet transportation controller 31b causes sheet transporter 46 to put an insertion sheet from sheet inserter 41 into the sheet path and transport the insertion sheet toward sheet stacker 45. After the insertion sheet has passed through sheet cutter 42 and the branch position on the sheet path (the position where the sheet path branches off to sheet buffer 43), sheet transportation controller 31b causes sheet transporter 46 to return the end part of the cut media sheets kept in sheet buffer 43 into the sheet path, and start transportation of the end part of the cut media sheets toward sheet stacker 45.
Sheet-feeding interval calculator 31c is configured to calculate a sheet-feeding interval to be used for controlling the time to feed each of media sheets to sheet cutter 42. In concrete terms, in a case that the sheet insertion mode is set to the pre-sheet insertion mode and an insertion sheet has already been transported into sheet buffer 43, sheet-feeding interval calculator 31c obtains a time period necessary for sheet cutter 42 to cut one of media sheets into cut media sheets, a time period necessary for sheet transporter 46 to return the insertion sheet from sheet buffer 43 into the sheet path, and an interval of the cut media sheets (an interval at which sheet transporter 46 transports the cut media sheets). In another case that the sheet insertion mode is set to the pre-sheet insertion mode and an insertion sheet has not been transported into sheet buffer 43 yet, sheet-feeding interval calculator 31c obtains a time period necessary for sheet cutter 42 to cut one of media sheets into cut media sheets, a time period necessary for sheet transporter 46 to transport an insertion sheet inserted into the sheet pass by sheet inserter 41, into sheet buffer 43, a time period necessary for sheet transporter 46 to return the insertion sheet from sheet buffer 43 into the sheet path, and an interval of the cut media sheets (an interval at which sheet transporter 46 transports the cut media sheets). In another case that the sheet insertion mode is set to the post-sheet insertion mode, sheet-feeding interval calculator 31c obtains a time period necessary for sheet cutter 42 to cut one of media sheets into cut media sheets, a time period necessary for sheet transporter 46 to transport an end part of the cut media sheets (one or more end cut media sheets among the cut media sheets) into sheet buffer 43, a time period necessary for sheet transporter 46 to return the end part of the cut media sheets from sheet buffer 43 into the sheet path, and an interval of the cut media sheets (an interval at which sheet transporter 46 transports the cut media sheets). Sheet-feeding interval calculator 31c then calculates the sheet-feeding interval by using the obtained time periods.
The setting controller 31a, sheet transportation controller 31b and sheet-feeding interval calculator 31c may be constituted as hardware devices. Alternatively, the setting controller 31a, sheet transportation controller 31b and sheet-feeding interval calculator 31c (particularly, setting controller 31a and sheet transportation controller 31b) may be provided by the program for controlling transportation of media sheets, which causes built-in controller 31 to function as these components when being executed by CPU 32. That is, built-in controller 31 may be configured to serve as the setting controller 31a, sheet transportation controller 31b and sheet-feeding interval calculator 31c (particularly, setting controller 31a and sheet transportation controller 31b), when CPU 32 executes the program for controlling transportation of media sheets.
Storage unit 35 is a non-transitory computer-readable recording medium including a HDD and/or a SSD. Storage unit 35 stores programs which, when being executed, cause CPU 32 to control operations of the components of printing device 30; information about processing and functions of printing device 30; a print job; image data created by image processor 38; a sheet-feeding interval calculated by sheet-feeding interval calculator 31c; and other data.
Network I/F unit 36 includes a NIC and/or a modem. Network I/F unit 36 communicably connects printing device 30 to communication network 50 so that printing device 30 can receive a print job from client terminal 20.
Display and operation unit 37 is configured to display various screens (including a screen that instructs an operator to load insertion sheets onto sheet inserter 41, and a screen that allows an operator to specify the sheet insertion mode), and to allow an operator to perform various kinds of operations (including operations to specify the sheet insertion mode) on the screens. Examples of the display and operation unit 37 include a touch screen in which an operation unit that works as an input device (a resistive touch sensor composed of lattice-shaped transparent electrodes or a capacitive touch sensor) is arranged on a display unit like a LCD or an OEL display. In the present embodiment, a touch screen, in which a display unit and an operation unit are housed in one body, is employed as an instance of display and operation unit 37, but alternatively, a display unit and an operation unit as separated bodies may be employed as an instance of display and operation unit 37.
Image processor 38 serves as a RIP (raster image processor) and is configured to translate a print job into intermediate data (an intermediate format called the display list or DL), and then rasterizes pages of the document in the print job to create bitmap image data. Image processor 38 is further configured to perform image processing, such as screening, tone correction, density-balance adjustment, thinning, halftoning and other processing, on image data as needed, and output the resulting image data to printing unit 40.
Sheet feeder 39 includes one or more feed trays so as to feed media sheets loaded on a feed tray to printing unit 40 through the sheet path.
Printing unit 40 is a print engine that is configured to use image data on which image processing was performed by image processor 38, to perform print processing on media sheets. Printing unit 40 includes components necessary for forming images on media sheets by using electrographic processes or electrostatic recording process, in other words, includes, for example, a charging unit, a photoreceptor drum, an exposure unit, a developing unit, transfer rollers, a transfer belt and a fixing unit. In concrete terms, printing unit 40 is configured to perform print processing as follows. The charging unit charges the photoreceptor drum, and the exposure unit irradiates the photoreceptor drum with a laser beam in accordance with image data, to create a latent image. The developing unit adheres charged toner onto the photoreceptor drum, to develop the toner image. The toner image is transferred onto a media sheet by the transfer rollers (for the first transfer process) and the transfer belt (for the second transfer process). The fixing unit then fixes the toner image onto a media sheet.
Sheet inserter 42 includes one or more insertion tray for loading insertion sheets, which are media sheets not to be subjected to print processing, such as media sheets printed by an external printing device in advance, interleaving sheets or blank sheets. Sheet inserter 42 is disposed so as to insert the insertion sheets loaded on an insertion tray into the sheet path (to put the insertion sheets to a position upstream of the sheet cutter 42 on the sheet path, in other words, a position between the printing unit 40 and sheet cutter 42 on the sheet path).
Sheet cutter 42 is disposed on the sheet path and is configured to receive printed media sheets on which printing unit 40 formed images and divide each of the printed media sheets into two or more cut media sheets that line in the sheet path, by cutting each of the printed media sheets in a direction crossing the sheet path (the cross-machine direction).
Sheet buffer 43 is disposed upstream of sheet cutter 42, that is, disposed on a branch line branching off from the sheet path at a branch position (see the branch position enclosed by dotted line in
Post-processing unit 44 is prepared in printing device 30 as needed, and is configured to perform post processing, such as hole punching, stapling and binding processing, on cut media sheets given by a division of printed media sheets with sheet cutter 42 and insertion sheets fed from sheet inserter 41.
Sheet stacker 45 includes one or more output trays for loading a stack of media sheets transported by sheet transporter 46, including cut media sheets given by a division of printed media sheets with sheet cutter 42 and insertion sheets fed from sheet inserter 41. Sheet transporter 46 includes various rollers including pairs of rollers, that press and hold media sheets between the rollers and rotate so as to transport media sheets fed from sheet feeder 39, cut media sheets given by a division of printed media sheets with sheet cutter 42 and insertion sheets fed from sheet inserter 41, along the sheet path toward post-processing unit 44 or sheet stacker 45.
It should be noted that
For example, printing device 30 illustrated in
For another example, printing system 10 of the present embodiment has the constitution that printing device 30 receives a print job from client terminal 20, but alternatively, printing device 30 may receive a print job from a server communicably connected to communication network 50 or obtain a print job from a memory like a USB (Universal Serial Bus) memory. In this case, client terminal 20 may be omitted from printing system 10.
Hereinafter, a description is given of concrete operations to control print processing and media sheet transportation to be executed in printing system 10, with reference to
Hereinafter, a description is given of operations of printing device 30 according to the present embodiment in details. CPU 32 of printing device 30 reads out the program for controlling transportation of media sheets, stored in ROM 33 or storage unit 35, loads the program onto RAM 34, and executes the program, thereby executing the steps of the flowcharts illustrated in
As illustrated in
On the other hand, judging that a division of media sheets is specified and that putting insertion sheets between cut media sheets is specified (YES in Step S202), built-in controller 31 (sheet transportation controller 31b) controls sheet transporter 46 to feed an insertion sheet from sheet inserter 41 into the sheet path as a starter and transport the insertion sheet into sheet buffer 43 (Step S204). Next, built-in controller 31 (sheet transportation controller 31b) controls sheet transporter 46 to feed a media sheet from sheet feeder 39 into the sheet path and transport the media sheet to printing unit 40, and printing unit 40 performs print processing on the media sheet. Sheet cutter 42 then divides the printed media sheet into cut pieces (cut media sheets) by cutting (Step S205). Next, built-in controller 31 (sheet transportation controller 31b) controls sheet transporter 46 to start transporting a leading part of the cut media sheets (one or more sheets among the cut media sheets, located upstream of the other cut media sheet or sheets in the sheet path) along the sheet path (Step S206), and judges whether the leading part of the cut media sheets has passed through the branch position on the sheet path at which the sheet path branches off to sheet buffer 43 (Step S207). Judging that the leading part of the cut media sheets has passed through the branch position (YES in Step S207), built-in controller 31 (sheet transportation controller 31b) controls sheet transporter 46 to return the insertion sheet kept in sheet buffer 43 to the sheet path through the branch position (Step S208), and start transporting a succeeding part of the cut media sheets (one or more sheets among the cut media sheets, located downstream of the leading part of the cut media sheets in the sheet path) along the sheet path (Step S209).
After that, built-in controller 31 (sheet transportation controller 31b) judges whether a next media sheet remains in sheet feeder 39 (Step S210). Judging that no media sheet remains in sheet feeder 39 (NO in Step S210), built-in controller 31 (sheet transportation controller 31b) ends the media sheet transportation. Judging that a next media sheet remains in sheet feeder 39 (YES in Step S210), built-in controller 31 (sheet transportation controller 31b) judges whether the sheet-feeding interval has elapsed from the time when the prior media sheet was fed into the sheet path (Step S211). Judging that the sheet-feeding interval has elapsed (YES in Step S211), built-in controller 31 (sheet transportation controller 31b) returns to Step S204 to execute succeeding processes similarly on the next media sheet.
On the other hand, judging that a division of media sheets is specified and that putting insertion sheets between cut media sheets is specified (YES in Step S302), built-in controller 31 (sheet transportation controller 31b) controls sheet transporter 46 to feed a media sheet from sheet feeder 39 into the sheet path as a starter and transport the media sheet to printing unit 40 (Step S304). Next, printing unit 40 performs print processing on the media sheet, and sheet cutter 42 then divides the printed media sheet into cut pieces (cut media sheets) by cutting. Built-in controller 31 (sheet transportation controller 31b) then controls sheet transporter 46 to start transporting a leading part of the cut media sheets (one or more sheets among the cut media sheets, located upstream of the other cut media sheet or sheets in the sheet path) along the sheet path (Step S305). Next, built-in controller 31 (sheet transportation controller 31b) controls sheet transporter 46 to transport the end part of the cut media sheets (one or more sheets among the cut media sheets, located downstream of the leading part of the cut media sheets in the sheet path) into sheet buffer 43 (Step S306), and feed an insertion sheet from sheet inserter 41 into the sheet path (Step S307). Next, built-in controller 31 (sheet transportation controller 31b) judges whether the insertion sheet has passed through the branch position on the sheet path at which the sheet path branches off to sheet buffer 43 (Step S308). Judging that the insertion sheet has passed through the branch position (YES in Step S308), built-in controller 31 (sheet transportation controller 31b) controls sheet transporter 46 to return the end part of the cut media sheets kept in sheet buffer 43 to the sheet path through the branch position (Step S309), and start transporting the end part of the cut media sheets along the sheet path (Step S310).
After that, built-in controller 31 (sheet transportation controller 31b) judges whether a next media sheet remains in sheet feeder 39 (Step S311). Judging that no media sheet remains in sheet feeder 39 (NO in Step S311), built-in controller 31 (sheet transportation controller 31b) ends the media sheet transportation. Judging that a next media sheet remains in sheet feeder 39 (YES in Step S311), built-in controller 31 (sheet transportation controller 31b) judges whether the sheet-feeding interval has elapsed from the time when the prior media sheet was fed into the sheet path (Step S312). Judging that the sheet-feeding interval has elapsed (YES in Step S312), built-in controller 31 (sheet transportation controller 31b) returns to Step 304 to execute succeeding processes similarly on the next media sheet.
Judging that an insertion sheet has already been transported and is kept in sheet buffer 43 (YES in Step S402), built-in controller 31 (sheet-feeding interval calculator 31c) obtains from storage unit 35 the first time period T1 indicating the time period necessary for sheet cutter 42 to cut one of printed media sheets (Step S403). Next, built-in controller 31 (sheet-feeding interval calculator 31c) obtains third time period T3 indicating the time period necessary for sheet transporter 46 to return the insertion sheet from sheet buffer 43 into the sheet path (Step S404), and further obtains fourth time period T4 indicating the interval of cut media sheets (the interval at which sheet transporter 46 transports cut media sheets) (Step S405). Built-in controller 31 (sheet-feeding interval calculator 31c) then calculates the total sum of time periods T1, T3 and T4 to obtain the sheet-feeding interval T0 (Step S406).
Judging that an insertion sheet has not been transported and is not kept in sheet buffer 43 yet (NO in Step S402), built-in controller 31 (sheet-feeding interval calculator 31c) obtains from storage unit 35 the first time period T1 indicating the time period necessary for sheet cutter 42 to cut one of printed media sheets (Step S407). Next, built-in controller 31 (sheet-feeding interval calculator 31c) obtains second time period T2 indicating the time period necessary for sheet transporter 46 to transport an insertion sheet inserted into the sheet pass by sheet inserter 39, into sheet buffer 43, and third time period T3 indicating the time period necessary for sheet transporter 46 to return the insertion sheet from sheet buffer 43 into the sheet path with sheet transporter 46 (Steps S408 and S409), and further obtains fourth time period T4 indicating the interval of cut media sheets (the interval at which sheet transporter 46 transports cut media sheets) (Step S410). Built-in controller 31 (sheet-feeding interval calculator 31c) then calculates the total sum of time periods T1, T2, T3 and T4 to obtain the sheet-feeding interval T0 (Step S411).
On the other hand, judging that the sheet insertion mode is set to the post-sheet insertion mode, built-in controller 31 (sheet-feeding interval calculator 31c) obtains from storage unit 35 the first time period T1 indicating the time period necessary for sheet cutter 42 to cut one of printed media sheets (Step S412). Next, built-in controller 31 (sheet-feeding interval calculator 31c) obtains second time period T2′ indicating the time period necessary the sheet transporter 46 to transport an end part of the cut media sheets given by a division of one of the printed media sheets, along the sheet path into sheet buffer 43 and third time period T3′ indicating the time period necessary for sheet transporter 46 to return the end part of the cut media sheets from sheet buffer 43 into the sheet path (Steps S413 and S414), and further obtains fourth time period T4 indicating the interval of cut media sheets (the interval at which sheet transporter 46 transports cut media sheets) (Step S415). Built-in controller 31 (sheet-feeding interval calculator 31c) then calculates the total sum of time periods T1, T2′, T3′ and T4 to obtain the sheet-feeding interval T0 (Step S416).
As described above, printing device 30 (or a device capable of dividing a media sheet into multiple cut media sheets by cutting and of putting an insertion sheet between the cut media sheets, like a finisher) includes sheet buffer 43 disposed downstream of sheet cutter 42, for leaving a sheet from the sheet path and keeping the sheet therein, and built-in controller 31 (sheet transportation controller 31b) of printing device 30 (or the built-in controller of the device) controls sheet transporter 46 to transport an insertion sheet or an end part of cut media sheets given by a division of a media sheet by cutting, into sheet buffer 43, so as to sort the media sheets in the sheet path. It allows printing device 30 (or the device) to put insertion sheet between cut media sheets and create a stack of cut media sheets and insertion sheets arranged in desired order.
It should be noted that the present invention should not be limited to the above-described embodiments, and the constitution and operations of the printing device and the system including the printing device can be modified appropriately, unless the modification deviates from the intention of the present invention.
For example, the above-described embodiment gave the operations to control of media sheet transportation in which each media sheet is cut into two pieces, but alternatively, the disclosed method for controlling transportation of media sheets is similarly applicable to operations to control media sheet transportation in which each media sheet is cut into three or more pieces.
For another example, the above-described embodiment gave operations to put insertion sheets between cut media sheets given by a division of all the media sheets fed from sheet feeder 39 by cutting, but alternatively, the disclosed method for controlling media sheet transportation is similarly applicable to operations to put insertion sheets between cut media sheets given by a division of one or more media sheets selected from the media sheets fed from sheet feeder 39 by cutting.
For another example, the above-described embodiment gave operations to put insertion sheets between only cut media sheets given by a division of media sheets, but alternatively, the disclosed method for controlling transportation of media sheets is similarly applicable to operations to put insertion sheets also between media sheets before cutting and/or between media sheets given by a division of different media sheets by cutting, additionally to between cut media sheets given by a division of each of media sheets by cutting.
The present invention is applicable to finishers capable of putting an insertion sheet between cut media sheets given by a division of a media sheet by cutting, programs for controlling transportation of media sheets, to be executed in the finisher, non-transitory computer-readable recording media each storing the program, and methods for controlling transportation of media sheets.
Although embodiments of the present invention have been described and illustrated in detail, it is clearly understood that the same is by way of illustration and example only and not limitation, the scope of the present invention should be interpreted by terms of the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2018-112414 | Jun 2018 | JP | national |
