Printer Temperature Control via Dynamic Counter Adjustment
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Solution Overview
Problem
The existing technique for determining the permissible number of printed sheets based on a single temperature reading can lead to varying productivity, as the number of sheets that can be printed without exceeding a temperature threshold depends on whether the temperature is rising or falling, potentially causing excessive temperature rises and lowering productivity.
Innovation Solution
A printing apparatus with a temperature detector and controller that adjusts a counter value based on temperatures at two points in time, switching to intermittent printing mode when the counter reaches a threshold, and adding an additional value to the counter based on temperature differences to prevent excessive temperature rises and maintain productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the permissible printing number is determined based on a temperature at a single point in time, then the temperature control is simplified, but the productivity of printing may lower due to excessive temperature rises
Solution Approach 1:
The patent applies dynamics by making the permissible printing number variable rather than fixed. The controller dynamically adjusts the permissible printing number based on temperature trends detected between two time points. When temperature is rising, a smaller number is set; when temperature is falling, a larger number is set. This dynamic adjustment optimizes both temperature control and printing productivity without excessive complexity.
Solution Approach 2:
The patent uses preliminary action by detecting the temperature trend in advance before excessive heating occurs. The controller measures the temperature difference between two time points to predict future temperature behavior, and proactively sets an appropriate permissible printing number to prevent temperature excess, thereby maintaining productivity while avoiding overheating.
2Reliability
If intermittent printing is performed frequently to control temperature, then temperature excess is prevented, but productivity of printing lowers
Solution Approach 1:
The patent dynamically adjusts the permissible printing number based on actual temperature trends rather than using a fixed threshold. By detecting whether temperature is rising or falling between two time points, the system sets appropriate printing numbers that allow continuous printing when safe, reducing intermittent printing frequency while maintaining reliable temperature control.
Solution Approach 2:
The patent implements feedback by continuously monitoring temperature changes and using this information to adjust the permissible printing number. The controller compares temperature at two time points, determines the trend, and feedback-adjusts the printing number accordingly, allowing the system to maintain productivity while preventing temperature excess through intelligent, responsive control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively suppresses temperature rises, preventing productivity losses by adjusting the printing mode and counter values according to temperature changes, ensuring consistent printing performance.
Implementation Method 1
a temperature detector configured to detect a temperature in the printing apparatus
Data Source
AI summary
A printing apparatus includes: a printing device configured to print an image on a sheet; a temperature detector configured to detect a temperature in the printing apparatus; and a controller. The controller executes: a first processing in which the controller changes a first indicator based on printing performed by the printing device; a second processing in which the controller changes the first indicator based on a first temperature detected by the temperature detector at a first point in time and a second temperature detected by the temperature detector at a second point in time; and a third processing in which the controller suppresses a rise in the temperature in the printing apparatus when the first indicator reaches a predetermined value.