US4922271A
Expired / Lapsed
US
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Matrix printer means
Assignee: Siemens AG
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Filing: 1988-09-14
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Granted: 1990-05-01
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Expires: 2008-09-14
Abstract
Abstract Matrix printer means having plurality of write heads. In order to be able to achieve a print width in matrix printer means that is greater than that of an individual write head and in order to simultaneously enhance the resolution beyond the basic resolution of the write head or in order to enable multi-color printing, a plurality of rows of write heads are provided. The neighboring write heads in one row and the rows themselves are arranged phase-shifted relative to one another or the colors of the write heads in every row and between the rows are cyclically interchanged. The plurality of required rows of write heads is thus reduced to a minimum.
Inventors
- 👤 Kenth Nilsson
- 👤 Bengt Jofs
- 👤 Goeran Skog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:42
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/485; B41J2/505; B41J2/515; B41J2202/00; B41J2202/01; B41J2202/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
75 words
A matrix printer means comprising a plurality of stationary write heads, each of said write heads having a limited number of printer elements per unit of length and having an edge region that is greater than half the spacing between neighboring printer elements, said write heads being arranged phase-shifted side-by-side in at least three rows and at least in three of said rows the write heads being parallel and arranged phase-shifted relative to one another.
Claim 2
Dependent Claim
75 words
A matrix printer means comprising a plurality of stationary write heads, each of said write heads having a limited number of printer elements per unit of length and having an edge region that is greater than half the spacing between neighboring printer elements, said write heads being arranged phase-shifted side-by-side in at least three rows and at least in three of said rows the write heads being parallel and arranged phase-shifted relative to one another.
Claim 3
Dependent Claim
46 words
The matrix printer means according to claim 1, wherein the phase shift is inversely proportional to a whole-numbered factor n>1 by which the resolution of the matrix printer is enhanced relative to the resolution of a single write head of said plurality of stationary write heads.
Claim 4
Dependent Claim
89 words
The matrix printer means according to claim 2, whereby M is the number of printer elements per write head, A is the distance between the centers of the two outermost printer elements of the write head and s is the distance between two adjacent printer elements, wherein the write heads in neighboring rows are offset by the distance D=A/n+1/n ×s and, within the same row, the distance C between the last printer element of one write head and the first printer element of the neighboring write head is C=D+s.
Claim 5
Dependent Claim
49 words
The matrix printer means according to claim 1, wherein a plurality of colors is used for printing such that every write head has only one predetermined color of the plurality of colors and the colors of the write heads in every row and between the rows are cyclically interchanged.
Claim 6
Dependent Claim
19 words
Matrix printer means according to claim 4, wherein said phase shift is inversely proportional to the number of colors.
Claim 7
Dependent Claim
52 words
The matrix printer means according to claim 5, wherein said phase shift is inversely proportional to a whole-numbered factor n, which is a sum of said number of colors used and the factor by which the resolution of the matrix printer means is enhanced over the resolution of a single write head.
Claim 8
Dependent Claim
89 words
The matrix printer means according to claim 6, wherein M is a number of printer elements per write head, A is a distance between the center of the two outmost printer elements of a write head and s is a distance between two adjacent printer elements, wherein the write heads in neighboring rows are off-set by a distance D=A/n+1/n×s, and, within the same row, a distance C between a last printer element of one write head and a first printer element of a neighboring write head is C=32 D+s.
Claim 9
Dependent Claim
100 words
A matrix printer means comprising a plurality of write heads arranged side-by-side in a row, each of said write heads having a limited number of printer elements per unit of length and having an edge region that is greater than half the spacing between neighboring printer elements, and having at least three such rows arranged parallel to one another and arranged phase-shifted relative to one another, the phase shift being inversely proportional to a whole-numbered factor n>1 by which the distance between matrix points producible by the printer elements is reduced in comparison to the distance between the printer elements.
Claim 10
Dependent Claim
100 words
A matrix printer means comprising a plurality of write heads arranged side-by-side in a row, each of said write heads having a limited number of printer elements per unit of length and having an edge region that is greater than half the spacing between neighboring printer elements, and having at least three such rows arranged parallel to one another and arranged phase-shifted relative to one another, the phase shift being inversely proportional to a whole-numbered factor n>1 by which the distance between matrix points producible by the printer elements is reduced in comparison to the distance between the printer elements.
Claim 11
Dependent Claim
88 words
The matrix printer means according to claim 8, whereby M is the number of printer elements per write head, A is the distance between the centers of the two outermost printer elements of a write head and s is the distance between two adjacent printer elements, wherein the write heads in neighboring rows are offset by the distance D=A/n+1/n×s and, within the same row, the distance C between the last printer element of one write head and the first printer element of the neighboring write head is C=D+s.
Claim 12
Dependent Claim
112 words
A matrix printer means for producing a plurality of colors that are all allocatable to one matrix point, respectively, comprising a plurality of write heads, each of said write heads having a limited number of printer elements per unit of length and having an edge region that is greater than half the spacing between neighboring printer elements, the write heads being arranged in rows and within a row being arranged side-by-side with zero phase shift relative to one another, the number of rows being one greater than the number of colors in the plurality of colors, the colors of the write heads in every row and between the rows being cyclically interchanged.
Claim 13
Dependent Claim
112 words
A matrix printer means for producing a plurality of colors that are all allocatable to one matrix point, respectively, comprising a plurality of write heads, each of said write heads having a limited number of printer elements per unit of length and having an edge region that is greater than half the spacing between neighboring printer elements, the write heads being arranged in rows and within a row being arranged side-by-side with zero phase shift relative to one another, the number of rows being one greater than the number of colors in the plurality of colors, the colors of the write heads in every row and between the rows being cyclically interchanged.
Claim 14
Dependent Claim
51 words
The matrix printer means according to claim 10, wherein the write heads in neighboring rows are off-set by a distance D=M/n×s, where n is the number of colors to be used, M is the plurality of printer elements per write head, and s is the distance between two adjacent printer elements.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |