EP0159895A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Printer for printing characters in two alternative print qualities
Assignee: JP Morgan Delaware
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Filing: 1985-04-16
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Granted: —
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Expires: 2005-04-16
Abstract
Abstract A printer prints characters by printing selected character elements in a matrix of print positions arranged in horizontal rows and vertical colums. The printer includes storage means (22) for storing sets of character date elements which are used for printing the character elements. The printer also includes logic means (23) for selectively performing logical operations on the sets of character data elements in order to vary the sets of character data elements in accordance with certains rules and thereby vary the print quality in the horizontal, vertical and diagonal directions of the characters which will be printed using the stored character data elements. The stored sets of character data elements are selected so thatthey can be used for printing characters which have a high print quality in the horizontal direction and a low print quality in the vertical and diagonal directions. In order to print characters in a low print quality the logic means (23) derives subsets of the stored sets of character data elements and only these subsets of character data elements are used for printing characters. In order to print characters in a high print quality the logic means (23) perform logical operations on the stored stes of character data elements so as to generate additional character data elements. These additional character data elements together with the stored character data elements are used for printing characters.
Inventors
- 👤 Randall Wayne Alexander
- 👤 Demetrios Troupes
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 20:35
CPC Classifications
G; G06; G06K; G06K15/00; G06K15/02; G06K15/10; G06K2215/00; G06K2215/0002; G06K2215/004; G06K2215/006
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
417 words
A printer for printing characters in two alternative print qualities by printing selected character elements in a matrix of positions arranged in horizontal rows and vertical columns comprising storage means (22) for storing sets of character data elements, each set defining the shape of a respective character, printing means (14, 15) for printing character elements defining characters when supplied with character data elements derived from said sets of character data elements, means (27) for selecting a low or a high print quality, logic means (23) responsive to the selection of a low or a high print quality to generate from said stored sets of character data elements modified sets of character data elements, and control means (21) responsive to the selection of a low or a high print quality to control the operation of said logic means (23) and to supply to said printing means (14, 15) said modified sets of character data elements, said printing means (14, 15) being responsive to the receipt of each of said modified sets of character data elements to print character elements defining a respective character in a low or a high print quality as selected, characterised in that each stored set of character data elements defines the shape of a respective character which has a high print quality in the horizontal direction and a low print quality in the vertical and diagonal directions, said logic means (23) is responsive to the selection of a low print quality to derive subsets of the character data elements of the stored sets, each of which subsets defines the shape of the respective character less densely in the horizontal direction, and said printing means (14, 15) is responsive to the receipt of each of said subsets of character data elements to print character elements defining a respective character which has a low print quality in all directions, and said logic means (23) is further responsive to the selection of a high print quality to perform logical operations on the character data elements of said stored sets of so as to generate associated additional character data elements for each set which define the shape of the respective character more densely in the vertical and diagonal directions, and said printing means (14,15) is further responsive to the receipt of each of said stored sets of character data elements and the associated additional character data elements to print character elements defining a respective character which has a high print quality in the horizontal, vertical and diagonal directions.
Claim 2
Dependent Claim
417 words
A printer for printing characters in two alternative print qualities by printing selected character elements in a matrix of positions arranged in horizontal rows and vertical columns comprising storage means (22) for storing sets of character data elements, each set defining the shape of a respective character, printing means (14, 15) for printing character elements defining characters when supplied with character data elements derived from said sets of character data elements, means (27) for selecting a low or a high print quality, logic means (23) responsive to the selection of a low or a high print quality to generate from said stored sets of character data elements modified sets of character data elements, and control means (21) responsive to the selection of a low or a high print quality to control the operation of said logic means (23) and to supply to said printing means (14, 15) said modified sets of character data elements, said printing means (14, 15) being responsive to the receipt of each of said modified sets of character data elements to print character elements defining a respective character in a low or a high print quality as selected, characterised in that each stored set of character data elements defines the shape of a respective character which has a high print quality in the horizontal direction and a low print quality in the vertical and diagonal directions, said logic means (23) is responsive to the selection of a low print quality to derive subsets of the character data elements of the stored sets, each of which subsets defines the shape of the respective character less densely in the horizontal direction, and said printing means (14, 15) is responsive to the receipt of each of said subsets of character data elements to print character elements defining a respective character which has a low print quality in all directions, and said logic means (23) is further responsive to the selection of a high print quality to perform logical operations on the character data elements of said stored sets of so as to generate associated additional character data elements for each set which define the shape of the respective character more densely in the vertical and diagonal directions, and said printing means (14,15) is further responsive to the receipt of each of said stored sets of character data elements and the associated additional character data elements to print character elements defining a respective character which has a high print quality in the horizontal, vertical and diagonal directions.
Claim 3
Dependent Claim
96 words
A printer for printing characters in two alternative print qualities as claimed in claim 1 characterised in that said logic means (23), when responsive to the selection of a low print quality, derives a subset of the character data elements of each stored set which includes all the character data elements of said set except any character data element which, when used for printing, would result in the printing of a character element in a print position adjacent in the horizontal direction to a print position in which a character element would have previously been printed.
Claim 4
Dependent Claim
99 words
A printer for printing characters in two alternative print qualities as claimed in claim 1 characterised in that said logic means (23), when responsive to the selection of a high print quality, detects any stored character data elements which, when used for printing, would result in the printing of character elements in two adjacent positions in the vertical direction and, upon detection of any such character data element, generates an additional character data element which, when used for printing, would result in the printing of an additional character element in the print position between said two adjacent print positions.
Claim 5
Dependent Claim
109 words
A printer for printing characters in two alternative print qualities as claimed in claim 1 characterised in that said logic means (23), when responsive to the selection of a high print quality, detects any stored character data elements which, when used for printing, would result in the printing of character elements in two adjacent positions in a direction which is at an angle to the horizontal and vertical directions and, upon detection of any such character data element, generates an additional character data element which, when used for printing, would result in the printing of an additional character element in the print position between said two adjacent print positions.
Claim 6
Dependent Claim
109 words
A printer for printing characters in two alternative print qualities as claimed in claim 4 characterised in that said logic means (23), when responsive to the selection of a high print quality, detects any other stored character data element which, when used for printing, would result in the printing of a character element in a print position located adjacent in the horizontal direction to one of said two adjacent positions on the side of said one print position nearest to the other print position and, upon the detection of any such other character data element, modifies its own performance so as not to generate said additional character data element.
Claim 7
Dependent Claim
99 words
A printer for printing characters in two alternative print qualities as claimed in claim 5 characterised in that said logic means (23), when responsive to the selection of a high print quality, detects any two other stored character data elements which, when used for printing, would result in the printing of character elements in print positions located adjacent in the vertical direction to and respectively above and below one of said two adjacent positions and, upon the detection of such two other character data elements, modifies its own performance so as not to generate said additional character data element.
Claim 8
Dependent Claim
27 words
A printer for printing characters in two alternative print qualities as claimed in claim 1 characterised in that said logic means (23) comprises a program controlled microprocessor.
Claim 9
Independent Claim
305 words
A method of printing characters in two alternative print qualities by printing selected character elements in a matrix of positions arranged in horizontal rows and vertical columns comprising storing sets of character data elements, each set defining the shape of a respective character, selecting a low or a high print quality, generating from said stored sets of character data elements modified sets of character data elements, in response to the selection of a low or a high print quality, and selectively using each of said modified sets of character data elements to print character elements defining a respective character in a low or a high print quality as selected, characterised by storing sets of character data elements each defining the shape of a respective character which has a high print quality in the horizontal direction and a low print quality in the vertical and diagonal directions, deriving, in response to the selection of a low print quality, subsets of the character data elements of the stored sets, each of which subsets defines the shape of the respective character less densely in the horizontal direction, and selectively using each of said subsets of character data elements to print character elements defining a respective character which has a low print quality in all directions, and further, in response to the selection of a high print quality, performing logical operations on the character data elements of said stored sets of so as to generate associated additional character data elements for each set which define the shape of the respective character more densely in the vertical and diagonal directions, and selectively using each of said stored sets of character data elements and the associated additional character data elements to print character elements defining a respective character which has a high print quality in the horizontal, vertical and diagonal directions.
Claim 10
Independent Claim
305 words
A method of printing characters in two alternative print qualities by printing selected character elements in a matrix of positions arranged in horizontal rows and vertical columns comprising storing sets of character data elements, each set defining the shape of a respective character, selecting a low or a high print quality, generating from said stored sets of character data elements modified sets of character data elements, in response to the selection of a low or a high print quality, and selectively using each of said modified sets of character data elements to print character elements defining a respective character in a low or a high print quality as selected, characterised by storing sets of character data elements each defining the shape of a respective character which has a high print quality in the horizontal direction and a low print quality in the vertical and diagonal directions, deriving, in response to the selection of a low print quality, subsets of the character data elements of the stored sets, each of which subsets defines the shape of the respective character less densely in the horizontal direction, and selectively using each of said subsets of character data elements to print character elements defining a respective character which has a low print quality in all directions, and further, in response to the selection of a high print quality, performing logical operations on the character data elements of said stored sets of so as to generate associated additional character data elements for each set which define the shape of the respective character more densely in the vertical and diagonal directions, and selectively using each of said stored sets of character data elements and the associated additional character data elements to print character elements defining a respective character which has a high print quality in the horizontal, vertical and diagonal directions.
Claim 11
Dependent Claim
83 words
A method of printing characters in two alternative print qualities as claimed in claim 8 characterised in that said subset derivation in response to the selection of a low print quality comprises including all the character data elements of said set except any character data element which, when used for printing, would result in the printing of a character element in a print position adjacent in the horizontal direction to a print position in which a character element would have previously been printed.
Claim 12
Dependent Claim
101 words
A method of printing characters in two alternative print qualities as claimed in claim 8 characterised in that said performance of logical operations in response to the selection of a high print quality comprises detecting any stored character data elements which, when used for printing, would result in the printing of character elements in two adjacent positions in the vertical direction and, upon detection of any such character data element, generating an additional character data element which, when used for printing, would result in the printing of an additional character element in the print position between said two adjacent print positions.
Claim 13
Dependent Claim
111 words
A method of printing characters in two alternative print qualities as claimed in claim 8 characterised in that said performance of logical operations in response to the selection of a high print quality comprises detecting any stored character data elements which, when used for printing, would result in the printing of character elements in two adjacent positions in a direction which is at an angle to the horizontal and vertical directions and, upon detection of any such character data element, generating an additional character data element which, when used for printing, would result in the printing of an additional character element in the print position between said two adjacent print positions.
Claim 14
Dependent Claim
115 words
A method of printing characters in two alternative print qualities as claimed in claim 11 characterised in that said performance of logical operations in response to the selection of a high print quality further comprises detecting any other stored character data element which, when used for printing, would result in the printing of a character element in a print position located adjacent in the horizontal direction to one of said two adjacent positions on the side of said one print position nearest to the other print position, and, upon the detection of any such other character data element, modifying the performance of said logical operations so as not to generate said additional character data element.
Claim 15
Dependent Claim
106 words
A method of printing characters in two alternative print qualities as claimed in claim 12 characterised in that said performance of logical operations in response to the selection of a high print quality further comprises detecting any two other stored character data elements which, when used for printing, would result in the printing of character elements in print positions located adjacent in the vertical direction to and respectively above and below one of said two adjacent positions, and, upon the detection of any two such other character data elements, modifying the performance of said logical operations so as not to generate said additional character data element.
Claim 16
Dependent Claim
34 words
A method of printing characters in two alternative print qualities as claimed in claim 8 characterised in that said subset derivation selection operations and said logical operations are performed by a program controlled microprocessor.
References Cited (Backward Citations)
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