Container Flange Coating for Continuous Sealing Surface
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Solution Overview
Problem
Existing container forming technologies lack a reliable method to create a continuous sealing surface on the flange of containers, which is essential for maintaining the freshness and integrity of contents, especially in food packaging.
Innovation Solution
A blank with a flange portion that includes score lines, which form pleats when the blank is press-formed into a container, and a coating that covers the pleats to create a continuous sealing surface on the flange, allowing for a secure lid attachment and maintaining a moisture- and air-tight seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If score lines are formed in the flange to create pleats for lid attachment, then the lid can be securely attached to the container, but the sealing surface becomes discontinuous and unreliable
Solution Approach 1:
The coating is applied to the flange before the pleating process, so that the coating material fills in the grooves and crevices of the pleats during forming. This preliminary coating application ensures that the final sealing surface is continuous and reliable, even though pleats are present for lid attachment.
Solution Approach 2:
The coating acts as an intermediary substance between the pleated flange structure and the lid. It fills the irregularities created by the pleats and provides a smooth, continuous sealing surface that enables reliable sealing while maintaining the structural integrity of the pleats for lid attachment.
2Adaptability or versatility
If the flange is formed with pleats to enable lid attachment, then the container can be securely closed, but a continuous sealing surface cannot be achieved
Solution Approach 1:
The coating process changes the surface parameters of the flange by filling in the pleat grooves and creating a uniform, continuous sealing surface. This parameter change occurs during or after the pleating process, allowing both pleat structure and smooth sealing surface to coexist.
3Reliability
If a coating is applied to cover the pleats, then a continuous sealing surface is formed, but the manufacturing process becomes more complex
Solution Approach 1:
The coating application process is merged with the existing pleating process, either by applying coating before pleating (so it gets worked into the pleats) or by using a coating process that can accommodate the pleated structure. This integration reduces overall manufacturing complexity compared to treating them as separate operations.
Data Source
AI summary
A method of forming a container from a blank. The method can comprise obtaining a blank having a wall portion, a flange portion, and a coating on at least a portion of the flange portion. At least one score line can extend at least partially in the flange portion, and the coating can at least partially cover the at least one score line. The method further can comprise forming the container from the blank by forming a wall of the container from the wall portion and forming a flange of the container from the flange portion. The flange can extend from the wall. The forming the container further can comprise forming the at least one score line into at least one pleat in at least the flange. The coating can at least partially cover the at least one pleat to form a substantially continuous sealing surface on the flange.