Printing Apparatus Dynamic Cutting for Handling Ease
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Solution Overview
Problem
Conventional printing apparatuses face difficulties in handling print media due to variations in the length of non-print end portions, which can make it challenging to detach the release paper, especially when the forepart margin is similar to the separation distance between the printing and cutting positions.
Innovation Solution
A printing apparatus with a processor-controlled conveyor, print head, and cutter system that adjusts the conveying and printing processes based on the separation distance and margin lengths to ensure a consistent non-print end portion, either securing a specified length or minimizing its size for easier handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the forepart margin length is made short to reduce waste, then the non-print end portion becomes difficult to handle, but if the forepart margin length is increased to improve handling, then more material is wasted
Solution Approach 1:
The patent segments the print medium into distinct functional portions: a print portion with printing applied, a forepart margin portion without printing, and a non-print end portion. By controlling the cutting position to separate these segments, the system ensures the non-print end portion has sufficient length for easy handling while the forepart margin is optimized to minimize waste, resolving the contradiction between handling ease and material efficiency
Solution Approach 2:
The system performs preliminary calculation of the required non-print end portion length based on the forepart margin length and cutting position before execution. The processor determines the optimal cutting position in advance to ensure the non-print end portion meets minimum handling requirements while minimizing forepart margin waste, allowing proactive optimization rather than reactive adjustment
2Device complexity
If the cutting position is fixed relative to the printing position, then the control system is simple, but the non-print end portion length varies causing handling difficulties
Solution Approach 1:
The patent implements dynamic adjustment of the cutting position based on real-time parameters including forepart margin length, separation distance between printing and cutting positions, and desired non-print end portion length. The processor calculates and adjusts the cutting position dynamically for each printing operation, ensuring consistent non-print end portion length and easy handling while accommodating variations in print media and printing conditions
Solution Approach 2:
The system incorporates feedback mechanisms where the processor continuously monitors the forepart margin length and separation distance, then adjusts the cutting position accordingly. This feedback loop ensures that despite variations in print media properties or positioning, the non-print end portion maintains the required length for easy handling, resolving the contradiction between control simplicity and handling consistency
Data Source
AI summary
A printing apparatus includes: a conveyor which conveys a print medium along a conveyance path; a print head which execute printing at a first position on the conveyance path; a cutter which cuts the print medium at least partially at a second position on the downstream side from the first position in the conveyance path; and a processor. The processor acquires a specified length along the conveyance path, acquires a first margin length along a conveyance direction in a first margin part, acquires a separation distance along the conveyance path between the first position and a third position which includes the second position and which is located on the conveyance path and between the first position to the second position, and determines whether the separation distance is equal to or longer than a first total length which is the total of the specified length and the first margin length.