Bag Spout Attachment Opening with Top Edge Clamping
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Solution Overview
Problem
Bags with corner-cut spout attachment portions and unsealed top edges face instability in maintaining an open shape during the manufacturing process, leading to incomplete inflation and deformation, as pressurized gas escapes through the unsealed top edge, making it difficult to maintain a stable opening shape.
Innovation Solution
A method and device involving a pair of opening suction cups and a gas blowing member, with clamping members that clamp the bag under the grippers on the top edge side to prevent gas escape, ensuring the bag is fully inflated and maintaining a stable opening shape by blocking the pressurized gas from escaping through the unsealed top edge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the top edge of the bag is left unsealed to allow easy filling, then the filling process becomes simpler and faster, but the pressurized gas escapes through the unsealed top edge causing incomplete inflation and unstable opening shape
Solution Approach 1:
The clamping members clamp the top edge of the bag before gas is blown in to inflate the bag. This preliminary action prevents gas escape during inflation while maintaining the unsealed top edge structure for subsequent filling operations.
Solution Approach 2:
The clamping members are made movable to provide dynamic control - they clamp the top edge during inflation to prevent gas escape, then can be released afterward to allow filling through the unsealed top edge. This dynamic adjustment resolves the contradiction between maintaining shape stability and enabling easy filling.
2Stability of the object's composition
If clamping members are added to prevent gas escape from the unsealed top edge, then the opening shape stability improves, but the device complexity increases
Solution Approach 1:
The clamping members serve multiple functions: they clamp the top edge to prevent gas escape during inflation, and can also be used to hold the bag steady during other operations. This multi-functionality justifies the added device complexity by providing benefits beyond just shape stabilization.
Solution Approach 2:
The clamping members are designed to be self-contained units that can independently perform the clamping function without requiring complex control systems or additional auxiliary devices. Each clamping member is a self-sufficient component that simplifies the overall device architecture despite adding functionality.
3Stability of the object's composition
If the bag is inflated with pressurized gas to maintain opening shape, then the opening shape stability improves, but gas escapes through the unsealed top edge causing energy loss and incomplete inflation
Solution Approach 1:
The clamping members clamp the top edge before gas is blown in to inflate the bag. This preliminary action prevents gas escape during inflation, ensuring complete inflation and eliminating energy loss while maintaining the unsealed top edge structure for subsequent filling operations.
Solution Approach 2:
The unsealed top edge, which initially causes gas escape and energy loss, is converted into a benefit by using clamping members that temporarily seal it during inflation. After inflation, the clamping members are released, allowing the unsealed top edge to serve as an easy access point for filling. The harmful feature is transformed into a beneficial feature through controlled temporary sealing.
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 allows for complete inflation of the bag, even when the top edge is not sealed, maintaining a stable opening shape of the spout attachment portion, preventing deformation and ensuring efficient gas distribution to the lower region of the spout attachment portion.
Implementation Method 1
the films on both sides of the spout attachment portion are suction-held by a pair of suction cups
Implementation Method 2
pressurized gas is blown into the bag from a gas blowing member to inflate the bag
Data Source
AI summary
A method and device for opening spout attachment portion of a bag being set up such that films on both sides of a spout attachment portion (2) of a bag (1) are suction-held up by a pair of suction cups (8), and the spacing between the pair of suction cups is widened to open the spout attachment portion, after which a gas is blown from the spout attachment portion into the bag by a gas blowing member (9); and when the gas is blown into, a clamping member (19) clamps a position under the gripper that is on the top edge (6) side of the bag from both sides of the bag, thus suppressing outflow of the gas blown into the bag from the top edge, thus allowing entire bag to inflate for its entirety substantially and the spout attachment portion to be kept opened.