Network printer with watch dog timer

专利名称：Network printer with watch dog timer发明人：Susumu Shiohara申请号：US09417363申请日：19991013公开号：US06731395B1公开日：20040504

专利附图：

摘要：A single CPU within a network printer executes in multiplex a communicationtask for extracting print job data from a packet received from the network in accordancewith the communication protocol, a language task for interpreting the print job data, anda print task for generating raster image to be sent to a print engine on the basis of the

result of the interpretation. Further, the CPU includes a watch dog timer (WDT) taskwhich is activated by the communication task. The WDT task operates in a manner that,when the communication task is blocked for a long time due to the busy state of thelanguage task and the print task and can not return a response to the network, the WDTtask returns a response of busy to the network before the transmission originatordisconnects the connection to the network thereby to maintain the connection, so that asucceeding packet can be received from the transmission originator when thecommunication task is released from the blocked state later.

申请人：SEIKO EPSON CORPORATION

代理机构：Sughrue Mion, PLLC

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