US 2006/0185543 A1 · Method for controlling development in automatic developing machine for photosensitive lithographic printing plate precursor and automatic developing machine therefor · patentgrep

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Abstract

The electric conductivity of the developer is measured every constant period, a development replenisher is replenished every constant time as a time lapse replenisher in an amount based on a set value of a time lapse replenishment rate, a development replenisher is replenished every processing of a constant area of a photosensitive lithographic printing plate precursor(s) as a processing replenisher in an amount based on a set value of a processing replenishment rate, a calculated value of electric conductivity is calculated from the amounts of the time lapse replenisher and the processing replenisher, the set values of the time lapse replenishment rate and the processing replenishment rate are increased or decreased according to the result of the comparison of the calculated value with the measured value, and the value of the difference between the calculated value and the measured value is displayed as a degree of a developer activity.

Claims9

Dependent claims

A method for controlling a development in an automatic developing machine for a photosensitive lithographic printing plate precursor, the method comprising:

developing a plurality of sheets of exposed photosensitive lithographic printing plate precursors with a developer containing an electrolyte while replenishing a development replenisher to keep a developer activity constant,
wherein an electric conductivity of the developer is measured every constant period;
a development replenisher is replenished every constant time as a time lapse replenisher in an amount based on a set value of a time lapse replenishment rate;
a development replenisher is replenished every processing of a constant area of a photosensitive lithographic printing plate precursor(s) as a processing replenisher in an amount based on a set value of a processing replenishment rate;
a calculated value of an electric conductivity is calculated from an amount of the time lapse replenisher and an amount of the processing replenisher;
the set value of the time lapse replenishment rate and the set value of the processing replenishment rate are increased or decreased according to a result of a comparison of the calculated value of the electric conductivity with the measured value of the electric conductivity of the developer;
and
a value of a difference between the calculated value of the electric conductivity and the measured value of the electric conductivity of the developer is displayed as a degree of a developer activity.

5 more elements

A method for controlling a development in an automatic developing machine for a photosensitive lithographic printing plate precursor, the method comprising:

developing a plurality of sheets of exposed photosensitive lithographic printing plate precursors with a developer containing an electrolyte while replenishing a development replenisher to keep a developer activity constant,
wherein an electric conductivity of the developer is measured every constant period;
a set value of a time lapse replenishment rate is integrated to an integrated value of the time lapse replenishment rate every constant time;
a set value of a processing replenishment rate is integrated to an integrated value of the processing replenishment rate every processing of a constant area of a photosensitive lithographic printing plate precursor(s);
and
thereafter, when a sum of the integrated value of the time lapse replenishment rate and the integrated value of the processing replenishment rate exceeds a value of the lowest replenishment amount, steps (a) to (e) are performed:
(a) a step of measuring an elapsed time between the last replenishment and a present time, and calculating a calculated value of an electric conductivity from the elapsed time;
(b) a step of displaying a value of a difference between the calculated value of the electric conductivity and the measured value of the electric conductivity of the developer as a degree of a developer activity;
(c) a step of changing the set value of the time lapse replenishment rate and the set value of the processing replenishment rate according to a result of a comparison of the calculated value of the electric conductivity with the measured value of the electric conductivity of the developer;
(d) a step of replenishing a developer in a developing tank with a replenisher in an amount corresponding to a sum of the integrated value of the time lapse replenishment rate and the integrated value of the processing replenishment rate;
and
(e) a step of initializing the integrated value of the time lapse replenishment rate and the integrated value of the processing replenishment rate.

9 more elements

A method for controlling a development in an automatic developing machine for a photosensitive lithographic printing plate precursor, the method comprising:

developing a plurality of sheets of exposed photosensitive lithographic printing plate precursors with a developer containing an electrolyte while replenishing a development replenisher to keep a developer activity constant, wherein an electric conductivity of the developer is measured every constant period;
a set value of a time lapse replenishment rate is integrated to an integrated value of the time lapse replenishment rate every constant time;
a set value of a processing replenishment rate is integrated to an integrated value of the processing replenishment rate every processing of a constant area of a photosensitive lithographic printing plate precursor(s);
a percent time lapse replenishment which is a ratio of a time lapse replenisher to a developer in a developing tank is calculated;
and
thereafter, when a sum of the integrated value of the time lapse replenishment rate and the integrated value of the processing replenishment rate exceeds a value of the lowest replenishment amount, steps (a) to (g) are performed:
(a) a step of measuring an elapsed time between the last replenishment and a present time, and calculating a first calculated value of an electric conductivity from the elapsed time;
(b) a step of displaying a value of a difference between the first calculated value of the electric conductivity and the measured value of the electric conductivity of the developer as a degree of a developer activity;
(c) a step of changing the set value of the time lapse replenishment rate and the set value of the processing replenishment rate according to a result of a comparison of the first calculated value of the electric conductivity with the measured value of the electric conductivity of the developer;
(d) a step of calculating a second calculated value of an electric conductivity by utilizing the percent time lapse replenishment;
(e) a step of changing the set value of the time lapse replenishment rate and the set value of the processing replenishment rate according to a result of a comparison of the second calculated value of the electric conductivity with the measured value of the electric conductivity of the developer;
(f) a step of replenishing a developer in a developing tank with a replenisher in an amount corresponding to a sum of the integrated value of the time lapse replenishment rate and the integrated value of the processing replenishment rate;
and
(g) a step of initializing the integrated value of the time lapse replenishment rate and the integrated value of the processing replenishment rate.

11 more elements

A method for controlling a development in an automatic developing machine for a photosensitive lithographic printing plate precursor, the method comprising:

developing a plurality of sheets of exposed photosensitive lithographic printing plate precursors with a developer containing an electrolyte while replenishing a development replenisher to keep a developer activity constant,
wherein an electric conductivity of the developer is measured every constant period;
a set value of a time lapse replenishment rate is integrated to an integrated value of the time lapse replenishment rate every constant time;
a set value of a processing replenishment rate is integrated to an integrated value of the processing replenishment rate every processing of a constant area of a photosensitive lithographic printing plate precursor(s);
a percent replenisher replacement which is a ratio of a developer replenishment to a developer in a developing tank is calculated;
a percent time lapse replenishment which is a ratio of a time lapse replenisher to a developer in a developing tank is calculated;
and
thereafter, when a sum of the integrated value of the time lapse replenishment rate and the integrated value of the processing replenishment rate exceeds a value of the lowest replenishment amount, steps (a) to (g) are performed:
(a) a step of measuring an elapsed time between the last replenishment and a present time, and calculating a first calculated value of an electric conductivity from the elapsed time and the percent replenisher replacement;
(b) a step of displaying a value of a difference between the first calculated value of the electric conductivity and the measured value of the electric conductivity of the developer as a degree of a developer activity;
(c) a step of changing the set value of the time lapse replenishment rate and the set value of the processing replenishment rate according to a result of a comparison of the first calculated value of the electric conductivity with the measured value of the electric conductivity of the developer;
(d) a step of calculating a second calculated value of an electric conductivity by utilizing the percent replenisher replacement and the percent time lapse replenishment;
(e) a step of changing the set value of the time lapse replenishment rate and the set value of the processing replenishment rate according to a result of a comparison of the second calculated value of the electric conductivity with the measured value of the electric conductivity of the developer;
(f) a step of replenishing a developer in a developing tank with a replenisher in an amount corresponding to a sum of the integrated value of the time lapse replenishment rate and the integrated value of the processing replenishment rate;
and
(g) a step of initializing the integrated value of the time lapse replenishment rate and the integrated value of the processing replenishment rate.

13 more elements

A method for controlling a development in an automatic developing machine for a photosensitive lithographic printing plate precursor, the method comprising:

developing a plurality of sheets of exposed photosensitive lithographic printing plate precursors with a developer containing an electrolyte while replenishing a development replenisher to keep a developer activity constant,
wherein an electric conductivity of the developer is measured every constant period;
a set value of a time lapse replenishment rate is integrated to an integrated value of the time lapse replenishment rate every constant time;
a set value of a processing replenishment rate is integrated to an integrated value of the processing replenishment rate every processing of a constant area of a photosensitive lithographic printing plate precursor(s);
a percent replenisher replacement which is a ratio of a developer replenishment to a developer in a developing tank is calculated;
a percent time lapse replenishment which is a ratio of a time lapse replenisher to a developer in a developing tank is calculated;
and
thereafter, when a sum of the integrated value of the time lapse replenishment rate and the integrated value of the processing replenishment rate exceeds a value of the lowest replenishment amount, steps (a) to (g) are performed:
(a) a step of measuring an elapsed time between the last replenishment and a present time, and calculating a first calculated value of an electric conductivity from the elapsed time and the percent replenisher replacement;
(b) a step of displaying a value of a difference between the first calculated value of the electric conductivity and the measured value of the electric conductivity of the developer as a degree of a developer activity;
(c) a step of changing the set value of the time lapse replenishment rate and the set value of the processing replenishment rate according to a result of a comparison of the first calculated value of the electric conductivity with the measured value of the electric conductivity of the developer;
(d) a step of calculating a second calculated value of an electric conductivity by utilizing the percent replenisher replacement and the percent time lapse replenishment;
(e) a step of changing the set value of the time lapse replenishment rate and the set value of the processing replenishment rate according to a result of a comparison of the second calculated value of the electric conductivity with the measured value of the electric conductivity of the developer;
(f) a step of replenishing a developer in a developing tank with a replenisher in an amount corresponding to the lowest replenishment amount when the electric conductivity of the developer is smaller than the first calculated value of the electric conductivity, or replenishing a developer in a developing tank with a replenisher in an amount corresponding to a sum of the integrated value of the time lapse replenishment rate and the integrated value of the processing replenishment rate when the electric conductivity of the developer is greater than the first calculated value of the electric conductivity;
and
(g) a step of initializing the integrated value of the time lapse replenishment rate and the integrated value of the processing replenishment rate.

13 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/359,576Filed 23 Feb 2006
Priority: JP 2005-04747523 Feb 2005
Published: 24 Aug 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G03F 7/3071
From printing plates transported horizontally through the processing stations: process control means, e.g. for replenishing
Y10S 101/43
Printing: machines printing by both intaglio and another type of printing means
G03F
Photomechanical production of textured or patterned surfaces
Y10S
Technical subjects covered by former uspc cross-reference art collections [xracs] and digests

Family

US 7,493,857 B2Related patent
US 2006/0185543 A1This patent

From the US filing history. Foreign family members aren’t listed.

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Citations

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