Printing Device Oblique Line Positioning for Rolled Media
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Solution Overview
Problem
Existing printing devices for long-size rolled media require pre-determination of tape width and cutting positions, limiting flexibility and complicating the process of printing on media of various widths due to the need for precise positioning and marking before cutting.
Innovation Solution
A printing device equipped with a print head that prints oblique lines on the medium at regular intervals, a conveying section, and a sensor to detect these lines, allowing for real-time adjustment of the printing position based on detected intervals to correct positional deviations during conveyance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If marks are printed in advance before cutting the original raw tape, then positioning accuracy is improved, but flexibility in determining tape width and cutting positions is reduced
Solution Approach 1:
The patent applies preliminary action by printing oblique line patterns on the original raw tape before cutting into individual tapes. These pre-printed oblique lines serve as reference marks that enable subsequent detection and positioning during the printing process, eliminating the need for post-cutting mark placement while maintaining positioning accuracy.
Solution Approach 2:
The oblique line pattern serves multiple functions: it provides reference marks for positioning, enables detection of conveying direction deviations, and works across tapes of various widths without requiring reconfiguration. This universal reference pattern allows the same printing method to be applied regardless of the final tape width or cutting positions.
2Manufacturing precision
If marks are provided at edge part or center of tape after cutting, then positioning accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The patent extracts the positioning function from the cutting process itself. Instead of requiring separate mark placement operations after cutting, the positioning information is embedded directly into the oblique line pattern that is printed during the normal printing process, eliminating additional manufacturing steps.
Solution Approach 2:
The oblique line pattern on the tape enables the printing system to self-correct positioning deviations automatically. The sensor detects the oblique lines and the control section calculates and corrects conveying direction deviations without requiring manual intervention or complex external positioning mechanisms.
3Manufacturing precision
If pre-determined cutting widths and positions are used, then manufacturing precision is improved, but adaptability for various tape widths is reduced
Solution Approach 1:
The patent introduces dynamic adjustment capability where the printing position is not fixed in advance but is continuously adjusted based on real-time detection of the oblique line pattern. The control section dynamically calculates corrections based on detected interval variations, allowing the system to adapt to different tape widths and cutting positions while maintaining precision.
Data Source
AI summary
A printing device includes a print head configured to execute printing on one surface of a long-size medium to be printed, on the other surface of which a plurality of oblique lines of the same angle of obliquity are formed at regular intervals, a conveying section configured to convey the medium to be printed, a sensor configured to detect the oblique lines, and a control section configured to control the print head to execute printing while changing a position of printing on the medium to be printed in accordance with an interval between the oblique lines in a conveying direction of the medium to be printed detected by the sensor.