Folded Lubricant Sheet for Controlled Shredder Cutter Lubrication

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Solution Overview

Problem

Existing lubrication systems for shredders often result in uneven distribution and wasteful dispersion of lubricant, leading to inefficient lubrication of cutter elements and potential damage to the shredder mechanism.

Innovation Solution

A lubricant sheet with a folded configuration that includes a primary barrier and secondary barriers to contain and deflect lubricant, forming a manifold for controlled release and redistribution, ensuring consistent lubrication of cutter elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If lubricant is released through compression during shredding, then lubrication of cutter elements is achieved, but uneven distribution and wasteful dispersion occur

Engineering Contradiction:

Improvelubrication effectivenessVSAvoidlubricant distribution efficiency

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The lubricant containment pocket is segmented into multiple compartments separated by partitions. This segmentation controls the release of lubricant in a structured manner, preventing wasteful dispersion and ensuring even distribution across cutter elements during the shredding process

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The folded blank of material acts as an intermediary structure between the lubricant and the external environment. The fold line creates a secondary barrier that mediates lubricant release, directing it toward cutter elements rather than allowing random dispersion

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If peripheral seals are used to retain lubricant, then lubricant is held in the containment pocket, but compression pressure builds up during shredding

Engineering Contradiction:

Improvelubricant containmentVSAvoidcompression pressure

Core Design Contradiction:

ReliabilityVSStress or pressure

Solution Approach 1:

The containment pocket is divided into compartments by partitions, which segment the compression pressure. This allows pressure to be distributed across multiple smaller chambers rather than building up uniformly, reducing peak stress on the peripheral seals while maintaining effective lubricant containment

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The fold line creates a secondary barrier that is intentionally designed to be breached under compression. This partial failure mechanism allows controlled pressure relief through the fold line rather than requiring complete seal failure, managing compression pressure while maintaining containment

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If lubricant is manually applied or shredded paper is used, then lubrication is provided, but even distribution is difficult to achieve

Engineering Contradiction:

Improvelubrication deliveryVSAvoidlubricant distribution uniformity

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The segmented containment pocket with multiple compartments ensures lubricant is released in controlled portions. As the shredder cuts through each compartment sequentially, lubricant is deposited evenly across different sections of the cutter elements, achieving uniform distribution that manual application cannot provide

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The lubricant is pre-positioned in specific compartments of the containment pocket before shredding begins. This preliminary arrangement ensures that lubricant is available at the right locations and times during the shredding process, guaranteeing even distribution without requiring manual intervention

Inventive Principle:

Principle #10Preliminary action

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 lubricant sheet provides effective and controlled lubrication, extending the lifespan of shredder components by maintaining lubricant in place and reducing wear on cutter elements.

Implementation Method 1

the secondary barrier is configured to deflect the released lubricant that is released towards the secondary barrier so as to relieve pressure in the released lubricant and to maintain the released lubricant in place for further lubrication

Methodology Applied

Scientific EffectPressure relief through deflection:

Implementation Method 2

a primary barrier for the lubricant that extends around and seals the lubricant containment pocket so as to hold the lubricant in the lubricant containment pocket

Methodology Applied

Scientific EffectPhysical containment: Physical Containment

Data Source

PatentUS12465922B2Lubricant sheet for a shredder

Publication Date: 2025.11.11 FELLOWES INC

AI summary

A lubricant sheet comprises a blank of material folded along a fold line into a folded configuration to form a lubricant containment pocket; a lubricant in the lubricant containment pocket; and a primary barrier for the lubricant. The primary barrier extends around and seals the lubricant containment pocket to hold the lubricant in the lubricant containment pocket. The blank of material includes a fold of material along the fold line forming a secondary barrier for the lubricant. When the lubricant in the lubricant containment pocket is being compressed during shredding of the lubricant sheet so as to cause some of the lubricant to be released through the primary barrier, the secondary barrier is configured to deflect the released lubricant that is released towards the secondary barrier.