Cap Applicator Holding Arrangement with Protrusions
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Solution Overview
Problem
Existing cap applicators for food product packaging systems face challenges with caps popping out prematurely due to reduced friction, especially with the introduction of tether bands, leading to potential machinery damage and downtime.
Innovation Solution
A holding arrangement for a cap applicator featuring an open cavity with a textured surface portion and radially inward protrusions along the circumferential surface, which cooperates with the cap's weakening line or bottom edge to counteract unintentional movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If friction-based holding is used in the cap applicator opening, then the cap can be held in place during insertion, but the cap pops out prematurely when release agents or tether bands are applied
Solution Approach 1:
The holding arrangement features a textured surface portion with protrusions at the bottom of the cavity that locally concentrate holding force on specific contact points of the cap (flange or shoulder), rather than relying on distributed friction across the entire cap-opening interface. This localized mechanical engagement prevents premature popping while maintaining reliable cap retention.
2Reliability
If the opening provides tight frictional contact to prevent cap popping, then cap retention is improved, but caps with tether bands cannot be properly held due to reduced friction
Solution Approach 1:
The textured surface with protrusions creates localized mechanical interlocking at the cap's structural features (flange or shoulder), bypassing the need for high-friction contact. This allows the system to accommodate caps with tether bands, release agents, or varying surface properties while maintaining secure holding through geometric engagement rather than friction-dependent contact.
3Device complexity
If a standardized opening design is used for all caps, then device complexity is reduced, but the system cannot accommodate variations in cap size and design
Solution Approach 1:
The holding arrangement uses a universal cavity design with a textured surface portion that can adapt to different cap types. The protrusions engage with various cap features (flange, shoulder, or rim) regardless of specific cap dimensions or design variations, allowing a single opening design to handle multiple cap sizes and configurations without requiring multiple specialized openings.
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 holding arrangement effectively prevents caps from popping out prematurely, ensuring secure attachment during the screwing process and easy release afterward, while accommodating various cap sizes and designs, including those with tether bands.
Implementation Method 1
The textured surface portion is configured to engage with and to transfer a rotational torque to the cap
Implementation Method 2
the one or more protrusions are configured to cooperate with a circumferential weakening line of the cap by depressing the cap at a location of the weakening line
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2A~2B
AI summary
The present invention relates to a holding arrangement (100) for a cap applicator (300). The holding arrangement (100) comprising an open cavity (102) configured to receive a cap (200). One or more protrusions (120) are provided along a circumferential surface portion (104) of the open cavity (102) and extending radially inwards from the circumferential surface portion (104), wherein the one or more protrusions (120) are configured to cooperate with a circumferential weakening line (202a, 202b) of the cap (200) by depressing the cap (200) at a location (L) of the weakening line (202a, 202b), when the cap (200) is received in the open cavity (102), or to cooperate with a bottom edge (204) of the cap (200) by engaging the cap (200) at a location (L') of the bottom edge (204), when the is cap (200) received in the open cavity (102), thereby counteracting unintentional movement of the cap (200) out of the open cavity (102). A cap applicator (300), a food product packaging system (400) and a method (500) are also provided.