Duplex Printing Control Switching Between Normal and Continuous Modes
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Solution Overview
Problem
Conventional duplex printing methods face challenges in efficiently managing the transition between normal and continuous duplex printing, leading to increased time requirements and reduced throughput when handling multiple print media, especially when print data reception is delayed or incomplete.
Innovation Solution
A printing apparatus with a receiving unit and print control unit that dynamically switches between normal and continuous duplex printing based on the availability of print data for the next print medium, allowing for immediate printing of the current medium if data is incomplete and delaying the start of printing for the next medium until necessary data is received, thereby optimizing the printing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If continuous duplex printing is executed to reduce overall printing time, then productivity is improved, but the system must wait for complete print data reception which increases loss of time when data is delayed
Solution Approach 1:
The patent segments the duplex printing process into two distinct modes: normal duplex printing (processing one print medium completely before starting the next) and continuous duplex printing (overlapping processing of multiple print media). The system dynamically selects between these segmented modes based on print data reception status, allowing optimization between throughput and waiting time.
Solution Approach 2:
The patent implements dynamic switching between normal duplex printing and continuous duplex printing based on real-time print data reception status. When print data for the next medium is received in time, the system transitions to continuous duplex printing mode to maximize throughput; otherwise, it reverts to normal duplex printing to avoid delays, making the system adaptive to varying data reception conditions.
2Reliability
If normal duplex printing is executed to ensure complete print data availability, then reliability is improved, but the printing speed decreases reducing productivity
Solution Approach 1:
The system dynamically adjusts its operating mode based on print data reception timing. When data arrives complete and on time, continuous duplex printing provides high speed; when data arrival is uncertain or delayed, the system switches to normal duplex printing to ensure data completeness, thus maintaining reliability while optimizing speed under favorable conditions.
Solution Approach 2:
The patent uses feedback from the print data reception status to control the printing mode selection. The system continuously monitors whether print data for the next medium has been received within the required time window and uses this feedback to switch between normal and continuous duplex printing modes, ensuring reliability while maximizing productivity when conditions permit.
3Loss of time
If the set time for data reception is shortened to discharge print medium earlier, then loss of time is reduced, but it becomes difficult to receive complete print data reducing reliability
Solution Approach 1:
The patent segments the time constraints into two scenarios: when the set time is sufficient to receive complete data (enabling continuous duplex printing) and when it is insufficient (requiring normal duplex printing). This segmentation allows the system to meet discharge time requirements while ensuring data completeness by selecting the appropriate mode for each situation.
Solution Approach 2:
The system dynamically adapts its printing mode based on whether print data can be received within the set time. When data reception completes within the time window, the system uses continuous duplex printing to achieve early discharge; when the window is insufficient, it switches to normal duplex printing, ensuring data completeness while still optimizing discharge timing.
Data Source
AI summary
A printing apparatus is provided which executes duplex printing on each print medium one by one when printing of a surface to be printed first of both surfaces of an (N+1)th print medium cannot be performed before starting printing of a surface to be printed later of both surfaces of an Nth print medium and continuously prints two print media when printing of a part of the surface to be printed first of the (N+1)th print medium can be performed before starting printing of the surface to be printed later of the Nth print medium.