Abstract:
Printers and methods for operating a printer are porvided. One method comprises receiving a print order associated with image data for use in printing a plurality images; converting the image data into actions to print (22) the plurality of images on a receever medium (24) with print adjacent areas between the printed images, the converting being performed in accordance with printer settings; printing a first set of color patches in the print adjacent areas when the each of the first set of calibration color patches can be printed in the print adjacent area; printing a second set of color patches in the print adjacent areas when each of the first set of color patches cannot be printed in the print adjacent areas; and sensing the color of each printed color patch add recalibrating the printer settings based upon the sensed colors(60).
Abstract:
A printing apparatus is connected to a network which includes an information processing apparatus transmitting printing data and an authentication information issuance server issuing authentication information to the information processing apparatus. The printing apparatus includes a transmitting unit, a receiving unit, and a printing unit. The transmitting unit transmits, to the information processing apparatus, information showing the authentication information being required, the authentication information is required in order to perform printing based on the printing data transmitted from the information processing apparatus, and the authentication information is issued from the authentication information issuance server. The authentication information indicates permission issued from the authentication information issuance server. The receiving unit receives the authentication information issued from the authentication information issuance server and the printing data from the information processing apparatus. The printing unit performs a print job based on the printing data received by the receiving unit.
Abstract:
The ink-agitator (1) is supported and guided by fixed means between pedestals (2) and (3) above an ink fountain containing security ink. It is driven in alternate movement on its guiding means and its tip is dipping into the ink. Bore (11) receives a detector head in the form of a transformer with primary winding arranged for normally producing a "zero" magnetic field, adjustable ferrite core place in such a manner that the "zero" magnetic field is obtained for a standard magnetic property of the security ink, and secondary winding going out of balance and issuing a signal if the magnetic property of the ink into which the tip of the ink-agitator is displaced undergoes modifications. The output signal is transmitted to feed line (4) with slide contact (6) whereas the ground pole is connected through wire (5) and sliding contact (7).
Abstract:
A correction value for correcting the error of the recording position in the direction of the horizontal scanning is determined with reference to a representative nozzle array in a predetermined region near the center out of the nozzle arrays that a print head has. The correction value is determined according to a misregistration check pattern printed by a representative nozzle. The error of the recording position along the horizontal scanning in bidirectional printing is corrected according to the correction value.
Abstract:
A method and system for verifying the intended imaging produced by a printer allow this task to be accomplished in essentially real-time, and utilizing relatively inexpensive, and high speed (e.g. about 200 feet per minute or greater) components. A computer control commands a raster image processor (RIP) to generate electronic print data (e.g. a bitmap) that is sent to an electronic digital printer (such as an inkjet cartridge array) and also to a print monitor. The printer images the bitmap onto a web or sheet, then a linear digital photosensor (e.g. photodiode) array scans essentially every pixel across the width of the web or sheet image area and transmits the scanned data to the print monitor system, which compares it to the bitmap produced by the RIP. If there is some discrepancy (of any sort), a message is generated which is ultimately transmitted back to the computer control where it may be used to log bad business forms being produced, generate human recognizable indicia (such as a warning light or sound), or shut down the system components. A second linear photodiode array may be provided before the printer and the data from it sent to the print monitor system to be combined with the electronic bitmap and compared to the data from the first sensor to determine whether there is any deficiency.
Abstract:
A method and system for verifying the intended imaging produced by a printer allow this task to be accomplished in essentially real-time, and utilizing relatively inexpensive, and high speed (e.g. about 200 feet per minute or greater) components. A computer control commands a raster image processor (RIP) to generate electronic print data (e.g. a bitmap) that is sent to an electronic digital printer (such as an inkjet cartridge array) and also to a print monitor. The printer images the bitmap onto a web or sheet, then a linear digital photosensor (e.g. photodiode) array scans essentially every pixel across the width of the web or sheet image area and transmits the scanned data to the print monitor system, which compares it to the bitmap produced by the RIP. If there is some discrepancy (of any sort), a message is generated which is ultimately transmitted back to the computer control where it may be used to log bad business forms being produced, generate human recognizable indicia (such as a warning light or sound), or shut down the system components. A second linear photodiode array may be provided before the printer and the data from it sent to the print monitor system to be combined with the electronic bitmap and compared to the data from the first sensor to determine whether there is any deficiency.
Abstract:
A method and apparatus for calibrating a halftone imaging system is described which automatically compensates for drifts in overall system performance as well as for any substantial change in the imaging parameters. Calibration is achieved by optimizing the exposure level of the imaging system and linearizing the exposure level of the imaging system based on the determined optimized exposure level. The method and apparatus of the present invention are capable of calibrating an imaging system automatically by generating lookup tables and transfer functions without substantial operator intervention. Once calibration is achieved, subsequent imaging commands are automatically mapped to appropriate commands that produce a calibrated output image.