Log Tail Gluing Device with Embossed Relief Protrusions
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Solution Overview
Problem
Existing devices for sealing the tail of tissue paper logs fail to reproduce sharp patterns and logos due to inefficient glue application, leading to soiling and potential damage to the web material.
Innovation Solution
A gluing device that embosses the tail of the log to create relief protrusions, allowing for precise and clean glue distribution using a smooth cliché roller, which applies glue to these embossing protuberances for accurate pattern reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rotating pad with relief areas is used to apply glue in a pattern, then an attempt is made to reproduce writing or logo on the log tail, but the device is unable to reproduce sharp patterns and logos and causes glue spray due to centrifugal force
Solution Approach 1:
The tail of the log is embossed beforehand to create relief protrusions that match the desired pattern. This preliminary action allows the subsequent glue application to simply follow the pre-formed relief areas, ensuring sharp pattern reproduction without requiring complex rotating pads with relief areas
Solution Approach 2:
Instead of using a rotating pad with relief areas to create the pattern directly during glue application, the invention inverts the approach by first embossing the tail to create the relief pattern, then using a smooth roller to apply glue that conforms to this pre-existing relief structure. This eliminates the centrifugal force problem associated with rotating pads
2Manufacturing precision
If a rotating pad with relief areas is used to apply glue, then pattern reproduction is attempted, but the glue pick-up system design causes glue spray due to centrifugal force
Solution Approach 1:
The tail embossing creates the logo pattern in advance, allowing the glue application to be a simple conformal coating process rather than requiring a rotating pad to carve out the pattern during application. This eliminates the centrifugal force that causes glue spray
Solution Approach 2:
The embossed relief protrusions act as an intermediary between the desired pattern and the glue application. The smooth cliché roller applies glue that conforms to these relief areas, which then transfer the pattern to the log tail without requiring the roller itself to have complex relief features that would generate centrifugal spray
Data Source
AI summary
A gluing device including a guide roller to guide the tail of the log; on the guide roller, retaining elements to engage and retain the tail on the guide roller; a gluing member, to apply a glue to the tail retained on the guide roller. There are also provided embossing members, arranged and controlled to emboss a portion of the tail of the log. The gluing member applies the glue to embossing protrusions formed by the embossing members.