Abstract: A gradient liquid feed pump system capable of liquid feed in a correct mixing ratio even in the case of liquid feed in which the mixing ratio varies. Specifically, it comprises a first plunger pump for sucking and delivering an eluate, a second the first and second plunger pumps through a cam, a first pressure sensor for measuring the pressure in the flow path of the second plunger pump, a second pressure sensor for measuring the pressure in the fist plunger pump, a cam position detecting sensor for detecting the cam position, wherein when the cam position is in a delivery interval, the rotary speed of the motor is increased, and the period for decreasing the rotary speed is determined on the basis of the difference between the pressure values obtained from the first and second pressure sensors, respectively. Thereby, liquid feed can be smoothly effected with correct mixing ratio while avoiding pressure interference between pumps.

Abstract: A gradient liquid feed pump system capable of liquid feed in a correct mixing ratio even in the case of liquid feed in which the mixing ratio varies. Specifically, it comprises a first plunger pump for sucking and delivering an eluate, a second the first and second plunger pumps through a cam, a first pressure sensor for measuring the pressure in the flow path of the second plunger pump, a second pressure sensor for measuring the pressure in the fist plunger pump, a cam position detecting sensor for detecting the cam position, wherein when the cam position is in a delivery interval, the rotary speed of the motor is increased, and the period for decreasing the rotary speed is determined on the basis of the difference between the pressure values obtained from the first and second pressure sensors, respectively. Thereby, liquid feed can be smoothly effected with correct mixing ratio while avoiding pressure interference between pumps.

Abstract: There is provided a print service apparatus generating print setting information including a print device ID by which a print device used for previously printing can be identified when the print service apparatus has been received a print order from a user terminal and performed a print service, and controlling to display information related with the print device identified by the print device ID in a browsing window of the user terminal based on the generated print setting information. This invention prevents a printout different in tint between pages when a plurality of color pages or color copies in a single print order are assigned as print jobs for respective print copies to a plurality of printing devices in a print service provider. Further, the print service information includes a print reorder information, and the same print device as used at a previous print order is selected and the same tint as set at the previous print order is set to the same print device.

Abstract: The present invention provides a function extension program that can communicate with a software for controlling a printer. This program causes a computer to execute a process of accepting a print instruction for a plurality of image data, a process of acquiring a list of identification information for the image data transmitted to the printer from first image list memory storing the list, a process of managing to store a list of identification information for the image data to be printed that is included in the print instruction in second image list memory, a process of comparing the list stored in the first image list memory and the list stored in the second image list memory, and a process of requesting the server device connected via a network for the image data that is included in the list stored in the second image list memory but not included in the list stored in the first image list memory, as a result of comparison by the comparison means.

Abstract: A reliable analytical apparatus is provided which can produce a highly reliable analytical Value on the basis of data entered during manual sample preparation which can be easily traced and used in editing of the analytical result of the analyzer because they are stored in association with the results of measurements by the analyzer. The analytical apparatus has an input device for inputting sample preparation procedures through the display screen, and various computations based on weighed quantities, constant dilution volume and so on entered during the manual preparation, which are automatically executed so as to eliminate human error.