Double-Walled Drinking Vessel Rim Structure for Thin Seamless Lips

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Solution Overview

Problem

Existing insulated drinking vessels lack a thin, yet long, drinking lip design, which affects their aesthetic appeal and functionality.

Innovation Solution

The design comprises an inner vessel, an outer vessel, and a ring component, where two of these components are pre-molded and fixedly secured together with a weld joint, and one component is molded in-situ to form a non-superficial homogenous joint, eliminating visible vestiges of the molding process and creating a thin, long lip.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional molding processes are used for insulated drinking vessels, then manufacturing is simpler, but visible molding vestiges appear on the surface

Engineering Contradiction:
Improvesurface qualityVSAvoidmolding process complexity
Core Design Contradiction:
Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent applies preliminary action by pre-molding the ring component separately with intentional gate positioning, then subsequently molding the inner and outer vessels over it. This preliminary preparation allows the gate vestige to be strategically placed and later concealed, resolving the surface quality issue without requiring complex post-processing.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The ring component serves as an intermediary element between the molding processes. It is pre-molded first, then the inner and outer vessels are molded over it, with the ring's gate vestige strategically positioned to be concealed by the subsequent components. This intermediary approach allows multiple molding operations while maintaining surface quality.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Strength

If multiple components are assembled separately, then manufacturing flexibility increases, but joint visibility and structural integrity deteriorate

Engineering Contradiction:
Improvejoint integrityVSAvoidassembly process
Core Design Contradiction:
StrengthVSDevice complexity

Solution Approach 1:

The patent merges multiple components through a multi-step molding process where the ring is pre-molded, then the inner and outer vessels are molded directly over it, creating integrated joints. The plastic material flows continuously from one component to another, forming homogenous joints that are both strong and visually seamless, eliminating the need for separate assembly operations.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The patent uses composite material techniques by molding different components (ring, inner vessel, outer vessel) from plastic materials that are compatible and can be molded together. The materials are selected and processed to ensure they bond homogeneously, creating joints with strength comparable to or exceeding the base materials themselves.

Inventive Principle:
Principle #40Composite materials

3Shape

If a thin lip is designed, then aesthetic appeal improves, but structural strength and functionality worsen

Engineering Contradiction:
Improvelip thicknessVSAvoidlip durability
Core Design Contradiction:
ShapeVSStrength

Solution Approach 1:

The lip is constructed as a composite structure formed by the integration of the ring, inner vessel, and outer vessel components. The multi-layer construction provides structural strength and durability while maintaining a thin profile, as each layer contributes to the overall strength without requiring increased thickness of any single component.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The lip structure merges the ring and vessel components into a unified, homogenous joint that distributes structural loads across multiple integrated elements. This merging creates a thin yet strong lip where the combined structure provides greater strength than individual components alone, enabling aesthetic thinness without sacrificing durability.

Inventive Principle:
Principle #5Merging (Combining)

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 results in an aesthetically pleasing, functional insulated drinking vessel with enhanced structural integrity and a thin, long lip, improving both appearance and usability.

Implementation Method 1

molded in-situ on the other two components to cause portions thereof to melt and intermingle to form a non-superficial homogenous joint therebetween

Methodology Applied
Scientific EffectMelting: Melting

Implementation Method 2

Two of the first, second and third components are fixedly secured together by a weld joint to form an integral unit

Methodology Applied
Scientific EffectWelding: Welding

Data Source

PatentUS9578981B2Insulated double walled drinking vessels and methods of making the same
Publication Date: 2017.02.28 TERVIS LLC
  • US9578981B2 patent drawing
  • US9578981B2 patent drawing
  • US9578981B2 patent drawing

AI summary

An insulated drinking vessel, e.g., a wine glass, and a method of making the same is disclosed. The drinking vessel basically comprises an outer vessel, an inner vessel and a ring. The inner and outer vessels each include a sidewall. The sidewalls are spaced apart. At least one of the outer vessel, the inner vessel and the ring are pre-molded to form an integral structure having a vestige of a molding gate used to mold the integral structure. At least one of the inner and outer vessels and the ring is molded in situ on the integral structure to cause portions thereof to melt and intermingle to form a non-superficial homogenous joint, with the ring forming the rim or lip of the insulated drinking vessel.