Package Handle Perforated Notched Cut Line Design

Solution Overview

Problem

Conventional packaging technologies require a large force to cut and lift handle portions due to misalignment of cutting and lifting directions, leading to stress concentration and potential defective cutting.

Innovation Solution

The implementation of perforated lines with notched cut lines that are parallel or at an acute angle to the lifting direction, starting from the boundary point between the cutting termination end and the connecting portion, facilitates easier cutting and lifting by reducing resistance and stress concentration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional perforated lines are used for handle portions, then the handle can be formed, but a large force is required to cut and lift the handle portion due to misalignment of cutting and lifting directions

Engineering Contradiction:

Improveease of cutting and lifting handle portionVSAvoidforce required to cut and lift handle portion

Core Design Contradiction:

Ease of operationVSForce

Solution Approach 1:

The notched cut lines are pre-formed at the boundary point between the cut portion and connecting portion, creating a starting point that aligns with the lifting direction before the actual cutting and lifting operation begins. This preliminary structural preparation reduces the force needed during the actual handle formation.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The notched cut lines are specifically positioned at the boundary point between the cut portion and connecting portion, creating a localized feature that facilitates cutting initiation. This local modification at the critical boundary area reduces overall cutting resistance without affecting the entire perforated line structure.

Inventive Principle:

Principle #3Local quality

2Reliability

If conventional perforated lines are used for handle portions, then the handle can be formed, but stress concentration occurs leading to potential defective cutting

Engineering Contradiction:

Improvereliability of cutting operationVSAvoidstress concentration at boundary point

Core Design Contradiction:

ReliabilityVSStress or pressure

Solution Approach 1:

The notched cut lines are pre-formed at the boundary point between the cut portion and connecting portion, creating a starting point that aligns with the lifting direction before the actual cutting and lifting operation begins. This preliminary structural preparation reduces the force needed during the actual handle formation.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The notched cut lines are specifically positioned at the boundary point between the cut portion and connecting portion, creating a localized feature that facilitates cutting initiation. This local modification at the critical boundary area reduces overall cutting resistance without affecting the entire perforated line structure.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11964802B2Package

Publication Date: 2024.04.23 RICOH CO LTD

AI summary

A package includes a structure and a handle structure portion. The structure constitutes a housing space to house a packaged object. The handle structure portion is disposed in the structure, formed by a perforated line, and lifted from the structure. The perforated line includes a cut portion, a connecting portion, and a notched cut line. The notched cut line is provided with respect to a central reference line that is an axis of symmetry of the handle structure portion. The notched cut line includes a base portion and a leading end. The notched cut line is included within a range closer to the boundary point than a center line of the connecting portion parallel to the lifting direction of the handle structure portion.