Label Peeling Method Using Conveying Path Bend and Rigidity
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Solution Overview
Problem
Existing label printers face difficulties in peeling labels from base sheets due to strong adhesion, leading to incomplete printing and conveyor issues, and require additional devices for label peeling, which increases the number of parts and apparatus size.
Innovation Solution
A label peeling method that involves bending the conveying path and stopping the label sheet at a predetermined point to allow the leading end to peel due to its own rigidity, followed by resuming the conveying and printing process to ensure secure peeling, without the need for a separate peeling device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate peeling device is provided to peel the label preliminarily, then the label can be peeled securely, but the number of parts and apparatus size increase
Solution Approach 1:
The label sheet itself is used to perform the peeling function by utilizing its own rigidity. The leading end portion of the label sheet is fed to the downstream side of the bent portion, allowing it to peel preliminarily from the base sheet without requiring an external peeling device. This self-service approach eliminates the need for additional peeling mechanisms while achieving reliable label separation.
Solution Approach 2:
The leading end portion of the label sheet is fed to the downstream side of the bent portion before the main printing and peeling process. This preliminary positioning creates initial separation between the label and base sheet, facilitating subsequent complete peeling. The preliminary action of positioning the leading end at the bent portion enables the peeling process to proceed smoothly without requiring additional peeling devices.
2Productivity
If the label sheet is conveyed continuously without stopping, then productivity is high, but the label cannot be peeled properly due to strong adhesion
Solution Approach 1:
The label sheet conveying is performed periodically with intermittent stopping. The conveying is stopped when the leading end portion reaches the downstream side of the bent portion, allowing peeling to occur. After peeling, conveying resumes. This periodic stop-and-go action enables reliable label peeling while maintaining overall productivity by minimizing stopping time.
3Manufacturing precision
If the label is difficult to peel due to strong adhesion or biting into the base sheet, then printing can be performed, but the label sheet conveying stops and printer operation fails
Solution Approach 1:
The leading end portion of the label sheet is fed to the downstream side of the bent portion before printing to create preliminary separation. This preliminary peeling action reduces adhesion strength before the printing process, preventing the label from biting into the base sheet during printing. As a result, both printing quality and operational continuity are maintained without printer stoppages.
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 method allows for secure peeling of labels from the base sheet without increasing the number of parts or size of the printer, ensuring smooth label discharge and preventing printer stoppages.
Implementation Method 1
when only the conveying-direction leading end portion of the label is fed more downstream than the bent portion of the conveying path, normally, the leading end portion is allowed to peel from the base sheet due to its own rigidity without being bent
Implementation Method 2
even in a state where the label is difficult to peel from the base sheet due to the strong adhesion thereof, the preliminarily peeling state is held continuously for a predetermined time, which makes it possible to cause a phenomenon that the leading end portion of the label peels gradually from the base sheet
Data Source
AI summary
A label peeling method for label sheet includes: conveying a label sheet including a base sheet and a label affixed to the base sheet along a conveying path that is bent at a bent portion; and performing a printing operation on the label from a beginning portion of printing while conveying the label sheet, wherein the conveying of the label sheet and the printing operation are stopped once in a state where the label sheet is conveyed until a conveying-direction leading end portion of the label reaches a downstream side of the bent portion of the conveying path, after a stopping state is held for a predetermined time, the conveying of the label sheet and the printing operation are resumed so that the label is peeled from the base sheet at the bent portion of the conveying path.