We claim:
1. In a printer having a printhead with nozzles which discharge a dot of ink by means of a firing pulse generated by an actuator and a printhead interface which transfers data to the print head and controls the nozzle firing sequence during printing the method of controlling the image printed by said printhead comprising the steps of:
loading viscositytime data for the ink into a programmable pulse duration table in the printhead interface;
loading said nozzles with ink;
sensing the temperature of the printhead;
generating a temperature signal corresponding to the temperature of the printhead;
feeding the temperature signal into said pulse duration table;
sensing the voltage available to the actuator generating an available voltage signal corresponding to the voltage available to the actuator;
feeding the available voltage signal into said pulse duration table;
generating an output signal from said pulse duration table;
feeding the output signal to a pulse width generator; and
pulsing each nozzle for the appropriate pulse duration, in response to output signal of the pulse width generator.
2. The method according to claim 1, wherein the steps of feeding the temperature signal into the pulse duration table, comprises the steps of first feeding the temperature signal into a sample and hold circuit, then into a converter where it is converted from an anolog signal into digital words, before being fed to the pulse duration table.
3. The method according to claim 2, wherein the steps of feeding the available voltage signal into the pulse duration table, comprises the steps of first feeding the available voltage signal into a sample and hold circuit, then into a converter where it is converted from an anolog signal into digital words, before being fed to the pulse duration table.
4. The method according to claim 1, further including the step of sensing the resistivity of the actuator heater and feeding this data to the pulse duration table, so as to adjust the pulse duration to maintain a constant energy.
5. The method according to claim 1, further including the step of sensing the critical part of the actuator heater adjusting the pulse duration accordingly.
6 The method of claim 1 wherein the viscositytime data for the ink is held in a QA chip associated with the ink cartridge.
7. The method according to claim 1, wherein the steps are carried out between each page to be printed.
8 A printer comprising:
a print head;
a plurality of ink discharge nozzles;
an ink cartridge for supplying ink to the ink discharge nozzles;
a memory unit associated with said cartridge containing viscositytime data on said ink;
an actuator containing a heater for producing firing pulses to discharge ink as dots from said nozzles;
a printhead interface for transferring data to the printhead and for controlling the nozzle firing sequence during printing;
a temperature sensor for sensing the temperature of the printhead and generating a temperature signal;
a voltage sensor for sensing the voltage available to the actuator and generating an available voltage signal;
a programmable pulse duration table, located within said printhead interface, which receives said temperature and available voltage signals, and the viscositytime data from said memory unit and thus generates an output signal; and
a pulse width generator which generates the firing pulses, in response to the said output signal.
9. A printer according to claim 8, further including a first sample and hold circuit and a first converter through which the temperature signal is fed, resulting in the anolog signal being converted to digital words before being applied to the pulse duration table, and a second sample and hold circuit and a second converter through which the available voltage signal is fed, resulting in the anolog signal being converted to digital words before being applied to the pulse duration table.
10. A printer according to claim 9 wherein the programmable pulse duration table has 256 entries.
11. A printer according to claim 8, wherein the memory unit is a QA chip.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A collection of compounds all of which are represented by formula II:
wherein:
A is O, S, NH, or a single bond;
R2 and R3 are independently selected from: H, R, OH, OR, \u2550O, \u2550CH\u2014R, \u2550CH2, CH2\u2014CO2R, CH2\u2014CO2H, CH2\u2014SO2R, O\u2014SO2R, CO2R, COR, CN and there is optionally a double bond between C2 and C3;
R6, R7, and R9 are independently selected from H, R, OH, OR, halo, nitro, amino, Me3Sn; where R is an alkyl group having 1 to 10 carbon atoms, or an aralkyl group of up to 12 carbon atoms whereof the alkyl group optionally contains one or more carbon-carbon double or triple bonds, which may form part of a conjugated system, or an aryl group of up to 12 carbon atoms;
and is optionally substituted by one or more halo, hydroxy, amino, or nitro groups, and optionally contains one or more hetero atoms which may form part of, or be, a functional group;
Y is a divalent group such that HY\u2550R;
X\u2032 is CO, NH, S or O;
T is an amino acid residue combinatorial unit, where each T may be different if n is greater than 1; and
n is a positive integer from 1 to 16.
2. A collection of compounds according to claim 1 wherein R and HY are independently selected from lower alkyl group having 1 to 10 carbon atoms, or an aralkyl group of up to 12 carbon atoms, or an aryl group of up to 12 carbon atoms, optionally substituted by one or more halo, hydroxy, amino, or nitro groups.
3. A collection of compounds according to claim 1, wherein R and HY are independently selected from lower alkyl groups having 1 to 10 carbon atoms optionally substituted by one or more halo, hydroxy, amino, or nitro groups.
4. A collection of compounds according to claim 1, wherein R or HY are independently selected from unsubstituted straight or branched chain alkyl groups, having 1 to 10 carbon atoms.
5. A collection of compounds according to claim 1 wherein R7 is an electron donating group.
6. A collection of compounds according to claim 1 wherein R6 and R9 are H.
7. A collection of compounds according to claim 1, wherein R2 and R3 of are H.
8. A collection of compounds according to claim 7, wherein R7 is an alkoxy group.
9. A collection of compounds according to claim 1 wherein there is no double bond between C2 and C3.
10. A collection of compounds according to claim 1, wherein \u2014Y-A- is an alkoxy chain.
11. A collection of compounds according to claim 1, wherein X\u2032 is either CO or NH.
12. A collection of compounds all of which are represented by formula III:
wherein:
A is O, S, NH, or a single bond;
R2 and R3 are independently selected from: H, R, OH, OR, \u2550O, \u2550CH\u2014R, \u2550CH2, CH2\u2014CO2R, CH2\u2014CO2H, CH2\u2014SO2R, O\u2014SO2R, CO2R, COR, CN and there is optionally a double bond between C2 and C3;
R6, R7, and R9 are independently selected from H, R, OH, OR, halo, nitro, amino, Me3Sn; where R is an alkyl group having 1 to 10 carbon atoms, or an aralkyl group of up to 12 carbon atoms whereof the alkyl group optionally contains one or more carbon-carbon double or triple bonds, which may form part of a conjugated system, or an aryl group of up to 12 carbon atoms; and is optionally substituted by one or more halo, hydroxy, amino, or nitro groups, and optionally contains one or more hetero atoms which may form part of, or be, a functional group;
Y is a divalent group such that HY\u2550R;
X\u2032 is CO, NH, S or O;
T is an amino acid residue combinatorial unit, where each T may be different if n is greater than 1;
n is a positive integer from 1 to 16;
L is a linking group, or a single bond; and
is a solid support.
13. A collection of compounds all of which are represented by formula IV:
wherein:
A is O, S, NH, or a single bond;
R2 and R3 are independently selected from: H, R, OH, OR, \u2550O, \u2550CH\u2014R, \u2550CH2, CH2\u2014CO2R, CH2\u2014CO2H, CH2\u2014SO2R, O\u2014SO2R, CO2R, COR, CN and there is optionally a double bond between C2 and C3;
R6, R7, and R9 are independently selected from H, R, OH, OR, halo, nitro, amino, Me3Sn; where R is an alkyl group having 1 to 10 carbon atoms, or an aralkyl group of up to 12 carbon atoms whereof the alkyl group optionally contains one or more carbon-carbon double or triple bonds, which may form part of a conjugated system, or an aryl group of up to 12 carbon atoms; and is optionally substituted by one or more halo, hydroxy, amino, or nitro groups, and optionally contains one or more hetero atoms which may form part of, or be, a functional group;
Y is a divalent group such that HY\u2550R;
X\u2032 is CO, NH, S or O;
T is an amino acid residue combinatorial unit, where each T may be different if n is greater than 1;
L is a linking group, or a single bond;
\u2003is a solid support;
n is a positive integer from 1 to 16;
R11 is either H or R;
Q is S, O or NH; and
R10 is a nitrogen protecting group.
14. A collection of compounds according to claim 13, wherein R10 has a carbamate functionality where it binds to the nitrogen atom at the 10 position of a PBD ring structure.
15. A collection of compounds according to claim 13, wherein Q is O, andor R11 is H.