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Sheet post-processing device, sheet post-processing system including the same, and image forming system including the sameRelated Patent Categories: Sheet Feeding Or Delivering, Delivering, Multiple Discharge, Of Successive Sheets To Plural Receivers In Succession, With Movable Receivers Or Receiver Portions, With Means To Increase Spacing Between Receiver Defining PortionsSheet post-processing device, sheet post-processing system including the same, and image forming system including the same description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070040328, Sheet post-processing device, sheet post-processing system including the same, and image forming system including the same. Brief Patent Description - Full Patent Description - Patent Application Claims
PRIORITY STATEMENT [0001] The present patent application claims priority under 35 U.S.C. .sctn.119 upon Japanese patent application no. 2005-238045, filed in the Japan Patent Office on Aug. 18, 2005, no. 2005-267401, filed in the Japan Patent Office on Sep. 14, 2005, no. 2006-001511, filed in the Japan Patent Office on Jan. 6, 2006, and no. 2006-133744, filed in the Japan Patent Office on May 12, 2006, the contents and disclosures of which are hereby incorporated by reference herein in their entirety. BACKGROUND [0002] 1. Field of Invention [0003] The present application generally relates to a sheet post-processing device, a sheet post-processing system including a plurality of the sheet post-processing devices, and an image forming system including the sheet post-processing system having the plurality of the above-described sheet post-processing device. [0004] 2. Discussion of the Related Art [0005] One image forming system employs a known technique for controlling an image forming device connected with a plurality of sheet processing devices for stably performing a sheet processing operation. [0006] Specifically, the image forming system includes a relay control unit is mounted between the image forming device and each sheet processing device so that the relay control unit can control operations of each sheet processing device. Such a relay control unit can determine the operation time for a corresponding sheet processing device that performs a specific function of various sheet processing operations, and, after a given period of the operation time has elapsed, transmit information of the sheet processing operation to each sheet processing device. [0007] Further, another image forming system employs a known data communication method using a technique in which data transmission is controlled. [0008] Specifically, when one peripheral device is connected with a single host system or with a plurality of host systems, the data communication method can cause the peripheral device to avoid the communication timeout with the host system. To avoid interruption of the communication with each host system when one peripheral device is connected to a plurality of host systems, a busy signal is output from the peripheral device to the host system while the peripheral device is in a condition it cannot receive data, and the host system that has received the busy signal temporarily stops data transmission after a given timeout period has elapsed. [0009] With the above-described data communication method, the peripheral device is caused to specify a timeout prevention period that runs shorter than the timeout period, count the timeout prevention period starting from the initial state of the busy signal, and reset the output of the busy signal after the timeout prevention period has elapsed. [0010] Further, one sheet post-processing system employs a known technique using a skewing part and connecting units that perform a multistage connection to simplify connecting mechanism and control software. [0011] Specifically, the skewing part receives a paper sheet discharged from an image forming device in a skewed state and discharges the paper sheet to a first sheet post-processing device on the basis of one end portion thereof. [0012] The connecting units are respectively provided in and controlled by a plurality of sheet post-processing devices so as to discharge the paper sheet from the skewing part or from an upstream device connected thereto to a downstream device also connected thereto. [0013] To transmit information of a paper sheet, for example, a paper size, a request of sheet post-processing and so forth, to the corresponding downstream device in a system in which a plurality of sheet post-processing devices are connected, it is commonly known to mount a relay control unit so that the relay control unit determines respective appropriate operation times for the plurality of sheet post-processing devices, and transmits the information to the corresponding sheet post-processing device after a given period has elapsed. Thus, it is preferable that each sheet post-processing peripheral device receives information of the paper sheet before or after the paper sheet is received. Otherwise, it may be difficult to perform sheet post-processing operations in high-speed and stable manner. [0014] However, the relay control unit may require space and costs, which can be a problem. Also, the operation times determined by the relay control unit generally have variations due to slippage in conveying paper sheets. When the degree of the variation is large, the information cannot be transmitted at a correct timing, which can cause errors. [0015] Further, in a sheet post-post processing system in which a plurality of sheet post-processing devices are connected to each other, a sheet post-processing device disposed on a further downstream side may need a longer time to receive a paper sheet from an image forming device connected to a most upper sheet post-processing device. [0016] If a driver of corresponding conveying rollers initiates the conveying rollers at the start of conveyance of the paper sheet, a period of rotation of the conveying rollers may become unnecessarily long. Especially when the sheet post-processing device is used for processing high-volume paper sheets in high speed, such unnecessary long period of rotation of the conveying rollers may cause a shorter life of the rollers. [0017] Further, the above-described sheet post-processing system including a plurality of sheet post-processing devices is generally connected to an image forming device, forming an image forming system. Such system, however, has the same problems as described above. SUMMARY [0018] One of more embodiments of the present invention has been made, taking the above-mentioned circumstances into consideration. [0019] At least one embodiment of the present invention provides a sheet post-processing device that includes a conveying member configured to convey a sheet-like recording medium, a processing unit configured to perform a given operation to the recording medium conveyed by the conveying member, a communication unit configured upon communicate with a device external to the sheet post-processing device for the given operation performed by the processing unit, and a control unit configured to control, via the communication unit, information passing between the sheet post-processing device and the external device at a desired timing. [0020] At least one embodiment of the present invention provides a sheet post-processing system that includes a plurality of the above-described sheet post-processing devices. [0021] At least one embodiment of the present invention provides an image forming system that includes an image forming device configured to form an image on a surface of a recording medium, and a plurality of the above-described sheet post-processing devices. Continue reading about Sheet post-processing device, sheet post-processing system including the same, and image forming system including the same... Full patent description for Sheet post-processing device, sheet post-processing system including the same, and image forming system including the same Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Sheet post-processing device, sheet post-processing system including the same, and image forming system including the same patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Sheet post-processing device, sheet post-processing system including the same, and image forming system including the same or other areas of interest. ### Previous Patent Application: Paper handling cassette system and cassette Next Patent Application: Board game apparatus for teaching electoral college, historical and geographical concepts Industry Class: Sheet feeding or delivering ### FreshPatents.com Support Thank you for viewing the Sheet post-processing device, sheet post-processing system including the same, and image forming system including the same patent info. IP-related news and info Results in 0.15721 seconds Other interesting Feshpatents.com categories: Accenture , Agouron Pharmaceuticals , Amgen , AT&T , Bausch & Lomb , Callaway Golf 174 |
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