Label Printer Conveyance Mechanism Adhesive Oozing Control
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Solution Overview
Problem
Linerless labels with exposed adhesive sides tend to ooze adhesive, causing it to stick to rollers in label printers, leading to improper feed control and requiring frequent adhesive removal.
Innovation Solution
A conveyance mechanism with a drive roller and assist roller configuration where the assist roller has a contact portion that avoids adhesive oozing from the label edges, and the drive roller has superior release characteristics to prevent adhesive sticking, along with small diameter portions to direct adhesive flow and prevent contact with the assist roller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the assist roller contacts the print side of the label to enable proper feed control, then the label feeding reliability is improved, but the adhesive oozing from the label edges sticks to the assist roller, causing it to fail rotating freely
Solution Approach 1:
The assist roller is segmented into different functional zones: a contact portion that contacts the print side of the label to enable proper feed control, and small diameter portions that create depressed regions to collect and contain the adhesive oozing from label edges, preventing it from reaching the rotation shaft and sticking to the assist roller body
Solution Approach 2:
The adhesive oozing from the label edges, which is a harmful factor, is redirected by the small diameter portions to collect in the depressed regions. This converts the harmful adhesive into a contained substance that does not interfere with the assist roller's rotation, while the contact portion maintains proper label feed control
2Object-generated harmful factors
If the drive roller uses material with release characteristics to prevent adhesive sticking, then adhesive sticking is reduced, but the adhesive still oozes from label edges and can stick to other components
Solution Approach 1:
The small diameter portions of the assist roller act as intermediaries that intercept and contain the adhesive oozing from the label edges. This prevents the adhesive from reaching other components and causing sticking or interference, while the drive roller's release characteristics prevent adhesive from sticking to it
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
The mechanism effectively prevents adhesive from sticking to rollers, ensuring smooth label feeding and reducing the need for frequent adhesive removal, while allowing for easy adaptation to different label widths and types.
Implementation Method 1
a drive roller configured to rotate in a state of contacting the adhesive side of the linerless label
Implementation Method 2
an assist roller configured to rotate in a state of contacting the print side of the linerless label
Data Source
AI summary
A conveyance mechanism is configured to sandwich a label including the adhesive side, on which an adhesive has been provided, between a drive roller and a rotatably provided assist roller and to drive the drive roller in order to unwind the label from a label roll in which the label is wound. The assist roller includes a contact portion configured to come into contact with at least a part of the print side of the label. The contact portion is provided so as to avoid coming into contact with an adhesive oozing from at least one of edges of the label along a conveyance direction of the label.