Packaging Blanks Arrayed for Rotary Die Cutters

Solution Overview

Problem

Conventional rotary die cutters have a minimum size limit for producing blanks without jamming, limiting their ability to produce smaller container blanks efficiently.

Innovation Solution

The use of an array of packaging blanks connected by a strut with lines of weakness allows for the production of smaller blanks on a rotary die cutter, enabling efficient cutting and separation without jamming.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If rotary die cutters are used to produce blanks, then productivity is improved, but blank size cannot be smaller than a minimum limit without causing jamming

Engineering Contradiction:

Improveblank production rateVSAvoidminimum blank size capability

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The blank is divided into multiple smaller segments arranged in an array pattern on the stock material. Instead of cutting one large blank at a time, the rotary die cutter simultaneously cuts multiple smaller blanks in an array, allowing small blank production while maintaining high productivity. The array configuration enables the cutter to process multiple units across the width of the stock material in a single pass.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention transitions from producing blanks in a single row to arranging them in a two-dimensional array across the stock material width. This dimensional change allows the rotary die cutter to utilize the full width of the material, increasing the number of blanks produced per pass while maintaining small individual blank sizes that would otherwise cause jamming.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If flatbed cutting dies are used to produce small blanks, then blank size adaptability is improved, but productivity deteriorates due to slower reciprocating motion

Engineering Contradiction:

Improvesmall blank size capabilityVSAvoidblank production rate

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The blank is divided into multiple smaller segments arranged in an array pattern on the stock material. Instead of cutting one large blank at a time, the rotary die cutter simultaneously cuts multiple smaller blanks in an array, allowing small blank production while maintaining high productivity. The array configuration enables the cutter to process multiple units across the width of the stock material in a single pass.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention transitions from the reciprocating motion of flatbed dies to the continuous rotational motion of a rotary die cutter. This dynamic change eliminates the stopping and starting associated with reciprocating motion, enabling continuous high-speed production of small blanks in an array configuration without the jamming issues that previously limited rotary cutters.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12208592B2Packaging blanks for containers arrayed for rotary die cutters

Publication Date: 2025.01.28 WESTROCK CP LLC

AI summary

An array of packaging blanks for containers includes a first set of one or more packaging blanks and a second set of one or more packaging blanks. A strut between the first set the second set is connected to the first set by a first line of weakness configured to be broken to separate the first set from the strut. The strut is connected to the second set by a second line of weakness configured to be broken to separate the second set from the strut.