Tape Printer Roll Sheet Sensor Mark Placement
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Solution Overview
Problem
Existing tape printers face challenges in accurately feeding and detecting the trailing end of thermal tapes, leading to issues with precise printing and production efficiency.
Innovation Solution
A thermal tape design featuring a release layer with sensor marks on one surface and a recording medium on the other, where the tape is rolled with the trailing end inside and the release layer facing outward, allowing for accurate detection by an optical sensor without exposing sensor marks on the edges, enabling easy production and feeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensor marks are placed on the trailing end of the tape for detection, then the trailing end can be detected, but the sensor marks become exposed when rolled up causing detection errors
Solution Approach 1:
The tape is divided into functional zones: a sensor mark arrangement region containing sensor marks for detection, and a non-recording region without sensor marks. This segmentation allows the tape to be rolled up with the non-recording region at the trailing end, preventing exposure of sensor marks while maintaining detection capability in the arrangement region.
Solution Approach 2:
The tape is pre-configured with a non-recording region at the trailing end that is free of sensor marks. This preliminary arrangement ensures that when the tape is rolled up, the trailing end naturally covers any sensor marks that might otherwise be exposed, eliminating detection errors before they occur.
2Measurement precision
If a small slip of paper is attached to detect the trailing end, then the trailing end can be detected, but the attachment process becomes troublesome and complex
Solution Approach 1:
The detection function is merged into the tape structure itself by incorporating sensor marks directly onto the tape body in a specific arrangement region. This eliminates the need for separate detection components like attached slips of paper, simplifying the overall system while maintaining detection precision.
Solution Approach 2:
The tape structure is designed to be self-sufficient for detection purposes. The sensor marks are integrated into the tape's own structure, allowing the tape to serve both as the recording medium and as the detection target, eliminating the need for external or additional components.
3Area of stationary object
If the entire surface of the release layer is used for recording, then recording area is maximized, but sensor marks cannot be properly positioned for detection
Solution Approach 1:
Different regions of the release layer are assigned different functions: the sensor mark arrangement region contains sensor marks for detection purposes, while the non-recording region is left without sensor marks to prevent exposure issues. This local differentiation allows both detection functionality and optimized recording space in other areas.
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 design ensures accurate detection of the tape's end, preventing errors in printing and reducing production costs by simplifying the detection process and eliminating the need for complex end-marking operations.
Implementation Method 1
an optical sensor that optically detects the tape
Implementation Method 2
an optical sensor that optically detects the tape
Data Source
AI summary
A roll sheet has a release paper as a base sheet. A recording paper is attached to the release paper via an adhesive layer so that the recording paper can be peeled off from the release paper. First and second peel-away areas are formed on both side edges of the roll sheet in the widthwise direction thereof by peeling off both widthwise edges of the recording paper from the release paper to allow the release paper to be exposed at the both side edges of the roll sheet. Sensor marks are printed on the release paper as being entirely shifted from the peel-away areas. This ensures that the roll sheet has a uniform thickness over the entire area of each sensor mark, thereby ensuring that each sensor mark has uniformities in its reflectivity and transmittance with respect to incident light.