Printing inks for the preparation of temporary supports for transfer printing on acid-modified textile fibre materials, containing (a) as a dyestuff intermediate a dyestuff base which can be sublimed at 160.degree.-240.degree. C, of the formula ##STR1## wherein R.sub.1 and R.sub.2 are alkyl, R.sub.3 is hydrogen, alkyl, cycloalkyl or aralkyl, R.sub.4 is hydrogen or a non-ionic substituent, R.sub.5 is hydrogen, an alkyl, alkoxycarbonyl or nitrile group, R.sub.6 and R.sub.7 are hydrogen or non-ioni...

A printing mechanism for printing characters comprises a rotatable hammer confronting through a recording paper the surface of a character pattern bearing body having a plurality of character patterns embossed in a predetermined array on its surface; a striking mechanism adapted to be driven upon the supply of a printing instruction signal so as to cause the peripheral surface of the rotatable hammer to strike through the recording paper the character pattern located in a printing position; a me...

In a printer for printing an attributed character by printing a character part and an attribute part separately, the invented printer or typewriter is so constructed that only an attribute part, e.g., an underline part or a bold face part, is printed in case a printed character is detected to already have the attribute, i.e., is underlined, or bold face, thereby preventing a character part of the printed character from being double printed. This results in improved quality in printed characters ...

This invention provides a printing apparatus which employs a print head constructed to minimize a memory area to hold ejection data and not requiring a sophisticated manufacturing technology and thus realizes a print mode to perform a higher-than-normal-resolution printing, making it possible to form a high quality image when needed. For each of cyan and magenta that make large contributions to the formation of an image, four nozzle arrays are allocated. For each of the remaining colors, two noz...

A printing method for printing an image on a medium, includes: performing a first printing process, wherein in the first printing process, the medium is carried in a carrying direction by a predetermined carry amount and an image is printed on the medium positioned at a print region, and wherein a carrying member used for carrying the medium is positioned upstream in the carrying direction with respect to the print region; and selecting the first printing process or a second printing process acc...

Faster printing and higher image quality are both achieved at a high level. The printing method determines between a first print mode and a second print mode, and ejects ink from a head. In the first print mode, both a dark ink and a light ink used for printing gradually dark and light of a given color are used and printing is performed with a predetermined number of types of dot gradation values, which is a plurality of types of dot gradation values, based on the sizes of the dots to be formed....

A printing method of the present invention includes the steps of: carrying a medium and ejecting ink from a print head to print, on the medium, a mark that can be filled in by a user; detecting, with a sensor, whether or not the mark has been filled in; and performing a process in accordance with a result of the detection by the sensor. With this printing method, operations with respect to a printing apparatus can be performed with ease.

A printing method and printing apparatus by which the quality of printed images can be improved are achieved. The printing method includes: (a) a step of printing a correction pattern on a medium, wherein the correction pattern is constituted by a line group including a plurality of lines arranged in an intersecting direction that intersects a movement direction of nozzles, each of the lines being made of a plurality of dots arranged in the movement direction, and is printed by alternately repea...

An inkjet printing apparatus which performs time-divisional driving poses the following problem for at least some gray levels when halftoning control by the unit matrix is performed. More specifically, the shape of a dot cluster in each unit matrix periodically changes due to the mismatch between the unit matrix size and the unit section size of time-divisional driving. For this reason, periodical density unevenness is generated and appears as degradation of the image quality. In order to preven...

A printing device is capable of externally detecting: (a) a toner concentration in a developing unit; and (b) a reduction in the usable amount of toner. This eliminates the conventional need of disposing the toner concentration sensor in a narrow developing unit or the need of disposing the toner remaining amount detection sensor in the toner supply unit. Further, it is possible to detect reduction in the amount of toner every time the toner in the developing unit is out, thereby detecting reduc...