EP0186508A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Device for distributive dot printing
Assignee: Fujitsu Ltd
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Filing: 1985-12-23
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Granted: —
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Expires: 2005-12-23
Abstract
Abstract A device for distributive dot printing on a print medium (12) includes a printing head (22) having a plurality of head pins (221-1, ... 221-N) arranged in an upright direction, a carriage (21) carrying the printing head (22) for transporting the printing head in the horizontal direction across the medium (12) and a carriage transportation control unit (62) for causing the printing head (22) to carry out a plurality of printing actions at a particular carriage position. The distributive dot printing is controlled by a head pin selection unit (3) for selecting predetermined head pins in groups for each printing action to cause the printing head to perform distributive dot printing. The pins in each group are selected so that the groups are interleaved to substantially prevent movement of the print medium (12) between actuation of successive groups.
Inventors
- 👤 Masaru Uematsu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 22:08
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/485; B41J2/505; B41J2/5056; H; H04; H04N; H04N1/00; H04N1/04; H04N1/19; H04N1/191; H04N1/1911; H04N1/1912
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
137 words
A device for distributive dot printing comprising: a printing head (22) having a plurality of pins (221-1, ... 221-N) arranged in an upright direction; a carriage (21) carrying the printing head (22) and arranged to transport the printing head (22) in a horizontal direction, in use across a medium (12) being printed; carriage transportation control means (62) for controlling horizontal movement of the carriage (21); and, head pin selection means (3) responsive to print data corresponding to the image to be printed and actuating the pins (221-1, ... 221-N) in two groups for each position of the carriage (21); characterised in that the head pins in the two groups selected by the selection means (3) are interleaved with one another to prevent any substantial shift of the medium (12) to be printed between operation of successive groups.
Claim 2
Independent Claim
137 words
A device for distributive dot printing comprising: a printing head (22) having a plurality of pins (221-1, ... 221-N) arranged in an upright direction; a carriage (21) carrying the printing head (22) and arranged to transport the printing head (22) in a horizontal direction, in use across a medium (12) being printed; carriage transportation control means (62) for controlling horizontal movement of the carriage (21); and, head pin selection means (3) responsive to print data corresponding to the image to be printed and actuating the pins (221-1, ... 221-N) in two groups for each position of the carriage (21); characterised in that the head pins in the two groups selected by the selection means (3) are interleaved with one another to prevent any substantial shift of the medium (12) to be printed between operation of successive groups.
Claim 3
Dependent Claim
43 words
A device according to claim 1, in which the head pin selection means (3) only actuates the pins in two groups when the image to be printed requires the actuation of more than a predetermined number of pins at a particular carriage position.
Claim 4
Independent Claim
112 words
A device for distributive dot printing for a printer comprising: print medium means on which printing by printing head means is carried out; printing head means having a plurality of head pins arranged in the vertical direction; carriage means carrying said printing head means for transporting said printing head means in the horizontal direction; carriage transportation control means for causing said printing head means to carry out a plurality of printing actions for each row of said head pins; and, head pin selection means for selecting predetermined head pins from one row of said head pins in each printing action to cause said printing head means to carry out distributive dot printing.
Claim 5
Independent Claim
112 words
A device for distributive dot printing for a printer comprising: print medium means on which printing by printing head means is carried out; printing head means having a plurality of head pins arranged in the vertical direction; carriage means carrying said printing head means for transporting said printing head means in the horizontal direction; carriage transportation control means for causing said printing head means to carry out a plurality of printing actions for each row of said head pins; and, head pin selection means for selecting predetermined head pins from one row of said head pins in each printing action to cause said printing head means to carry out distributive dot printing.
Claim 6
Dependent Claim
31 words
A device according to claim 1, 2 or 3, further comprising voltage detection means for detecting the voltage of a power source for driving head pins of said printing head means.
Claim 7
Dependent Claim
60 words
A device according to claim 4, further comprising voltage signal generating means for generating signals for instructing a plurality of printing actions to said carriage transportation control means and instructing selection of pins to said head pin selection means, when the voltage of a power source for driving head pins of said printing head means falls below a predetermined voltage.
Claim 8
Independent Claim
24 words
A device according to any one of the preceding claims, further comprising temperature detection means for detecting the temperature of said printing head means.
Claim 9
Dependent Claim
51 words
A device according to claim 6, further comprising temperature signal generating means for generating signals for instructing a plurality of printing actions to said carriage transportation control means and instructing selection of pins to said head pin selection means, when the temperature of said printing head means exceeds a predetermined temperature.
References Cited (Backward Citations)
No citation records indexed.
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