Linerless Thermal Printer Feed Reversal to Prevent Platen Sticking
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Solution Overview
Problem
Linerless thermal printers face issues with adhesive material sticking to the platen roller after prolonged inactivity, leading to operational inefficiencies and potential paper jams.
Innovation Solution
A method involving reverse movement of the linerless printing material from a waiting position to a print start position before printing, utilizing sensors and motors to ensure precise positioning and release the adhesive bond.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the linerless printing material remains in the print start position after cutting, then the printing operation can be quickly resumed, but the adhesive coating sticks to the platen roller due to prolonged contact
Solution Approach 1:
The system performs a preliminary reverse movement of the printing material before printing resumes. This preliminary action separates the material from the platen roller surface, preventing adhesive sticking while ensuring the material is properly positioned for the next printing operation.
Solution Approach 2:
The system moves the printing material in reverse direction (counter to conveying direction) from the waiting position back to the print start position. This inverted movement effectively separates the material from the platen roller, breaking the adhesive bond that would otherwise form during prolonged stationary contact.
2Loss of energy
If the printer remains inactive for a long time, then energy consumption is reduced, but the adhesive coating sticks to the platen roller when operation resumes
Solution Approach 1:
Before each printing operation after inactivity, the system performs a preliminary reverse movement to separate the printing material from the platen roller. This ensures reliable operation resumes without adhesive sticking, while the printer can remain inactive between operations to conserve energy.
Solution Approach 2:
The system automatically performs the reverse movement and material repositioning without manual intervention. This self-service mechanism ensures reliable operation resumes after inactivity while maintaining energy efficiency during idle periods.
3Ease of operation
If the remaining linerless printing material is retracted into print start position after cutting, then the material is ready for next printing, but the material may wrap around the platen roller due to adhesive force
Solution Approach 1:
The system moves the printing material in reverse direction from the waiting position back to the print start position. This inverted movement creates separation between the material and platen roller surface, preventing the harmful wrapping effect while ensuring proper positioning for next printing.
Solution Approach 2:
The reverse movement is performed as a preliminary action before the next printing operation. This ensures the material is properly separated and positioned in advance, preventing wrapping issues during the actual printing process.
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
Effectively prevents adhesive material from sticking to the platen roller, ensuring smooth operation and preventing paper jams, even after extended periods of inactivity.
Implementation Method 1
a motor (24) of the linerless thermal printer driving a platen roller (6) so as to move the linerless printing material (20) in the reverse direction
Implementation Method 2
Thermal printing is a printing process that uses the selective application of heat to the printing material
Implementation Method 3
the adhesive force between the linerless printing material and the platen roller may depend on the contact pressure, the adhesive strength of the adhesive coating, the aging of an anti-sticking coating on the platen roller and the contact time
Data Source
AI summary
A method for operating a linerless thermal printer involves moving a front edge of a linerless printing material in a reverse direction counter to a conveying direction from a waiting position (II) towards a print start position (I) before printing on the linerless printing material. The waiting position of the front edge is disposed on an opposite side of a cutter from a platen roller of the linerless thermal printer. Printing on the linerless printing material is performed after the moving of the front edge of the linerless printing material in the reverse direction. The printing on the linerless printing material begins with the front edge of the linerless printing material being disposed at the print start position. In one embodiment, the print start position of the front edge of the linerless printing material is disposed at the platen roller.