Glue Distributor Roll for Paper Log Tail Adhesion
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Solution Overview
Problem
Existing gluing systems for the final tail of paper rolls suffer from contamination of non-defective logs and lack precision in glue application, with previous solutions either continuously contaminating logs or not allowing adjustable glue quantity.
Innovation Solution
A device featuring a pick-up roll partially immersed in glue, which transfers measured quantities of glue to a paddle or blade on a separate roll, allowing precise control of glue application through varying angular speeds and surface finishes, ensuring uniform distribution and avoiding contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an overflowing glue dispenser is used to apply glue to the log, then the glue application is continuous and simple, but it causes contamination of logs that do not need glue application
Solution Approach 1:
The patent implements periodic action by using a movable element that is periodically immersed in and withdrawn from the glue container. This element applies glue only when needed (when a log requires gluing) and remains withdrawn otherwise, eliminating continuous glue application and preventing contamination of logs that do not require glue.
2Device complexity
If a movable element completely immersed in glue is used to apply glue to the log, then the glue application mechanism is simple, but the quantity of glue applied cannot be varied without substituting the device
Solution Approach 1:
The patent applies dynamics by making the movable element's position variable rather than fixed. The element can be dynamically adjusted between different immersion depths in the glue container, allowing the quantity of glue applied to be varied continuously without replacing the entire device. This dynamic positioning capability provides adaptability while maintaining structural simplicity.
3Productivity
If glue is applied continuously to all logs, then the gluing process is uninterrupted, but defective logs are unnecessarily contaminated with glue
Solution Approach 1:
The patent extracts the harmful aspect of continuous glue application by removing the glue application function for logs that do not need it. The movable element is taken out of the glue container and positioned away from logs that should not receive glue, while remaining in position for logs that require gluing. This selective extraction maintains productivity for good logs while eliminating contamination of defective ones.
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 solution effectively prevents log contamination and allows for precise control of glue quantity, ensuring uniform application on the log surface while avoiding unnecessary glue application on defective logs.
Implementation Method 1
a pick up roll, partially immersed in glue in a tank, which transfers measured quantities of glue to a glue applicator or glue distributor roll
Data Source
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AI summary
Apparatus for gluing the final tail (L') of rolls or logs (L) of wound sheet material includes a glue distributor device (10) located below an opening (7) in a roll down table (6). The tail (L') of the roll is separated from the roll (L) by a tail separating unit upstream of the opening (7). The gluing distributor device (10) includes a tank (11) containing glue (12), a rotatable pick up roll (13) located inside of the tank and partially immersed in the glue, and a glue distributor roll (14) positioned externally above the tank (11) and provided with at least one paddle (15). The pick up roll (13) picks up glue as it rotates, and the rotating paddle (15) contacts the pick up roll (13) and picks up glue as the glue distributor roll (14) rotates. The paddle (15) rotates into the opening (7) in the roll down table (6), and glue is transferred from the paddle (15) to a roll as the roll rolls over the opening (7). A cull roll can be culled without applying glue to the roll by mounting a cull roll support projection (19; 21) on the glue distributor roll (14) which is not long enough to contact the pick up roll (13). The cull roll support projection is positioned in the opening (7) in the roll down table (6) when the cull log rolls over the opening (7).