Manual Slit Sheet Paper Dispenser with Tensioning Mechanism

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Solution Overview

Problem

Existing packing materials, such as plastic packing peanuts and bubble wrap, pose ecological and performance issues, including non-biodegradability, bulkiness, and storage problems, while manual expansion systems for slit sheet paper are cumbersome and require significant space and power.

Innovation Solution

An unpowered, manually operable apparatus that aligns rolls of interleaf and expandable sheet materials, allowing for manual expansion and dispensing of eco-friendly cushioning wrap material, with a frame design that includes opposing brackets and a tensioning mechanism to control the expansion of slit sheet paper, enabling efficient wrapping without the need for electrical power.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional electric powered machines are used to expand and dispense slit sheet packing material, then the material can be expanded and dispensed effectively, but the machine requires a large amount of table space and vertical space

Engineering Contradiction:

Improvematerial expansion and dispensing capabilityVSAvoidtable space and vertical space

Core Design Contradiction:

ProductivityVSArea of stationary object

Solution Approach 1:

The apparatus segments the material supply system into two separate rolls (expandable sheet material and interleaf material) that can be independently managed, allowing the overall system to be more compact while maintaining full functionality

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The interleaf material is nested within the expanded sheet material structure, with the unexpanded interleaf roll positioned inside or adjacent to the expandable sheet roll, maximizing space utilization in a compact footprint

Inventive Principle:

Principle #7Nested doll (Nesting)

2Productivity

Engineering Contradiction:

Improvematerial expansion and dispensing capabilityVSAvoidmachine weight

Core Design Contradiction:

ProductivityVSWeight of moving object

Solution Approach 1:

The invention extracts and eliminates all electric motors, power supplies, and electronic control systems from the apparatus, retaining only the essential mechanical components needed for material expansion and dispensing, thereby dramatically reducing weight while preserving core functionality

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The apparatus is designed to be manually operated, where the user's hand movements directly drive the expansion and dispensing mechanisms through simple mechanical means, eliminating the need for heavy electric components

Inventive Principle:

Principle #25Self-service

3Productivity

Engineering Contradiction:

Improvematerial expansion and dispensing capabilityVSAvoidlocation flexibility

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The invention extracts and eliminates all electrical power dependencies, including motors, control circuits, and power consumption, enabling the apparatus to be placed anywhere without requiring proximity to electrical outlets

Inventive Principle:

Principle #2Taking out (Extraction)

4Productivity

If mechanical components of dispensing machines are used, then the material can be expanded and dispensed, but the components eventually wear and must be replaced or repaired

Engineering Contradiction:

Improvematerial expansion and dispensing capabilityVSAvoidcomponent maintenance

Core Design Contradiction:

ProductivityVSEase of repair

Solution Approach 1:

The invention extracts and eliminates complex mechanical transmission components such as gears, belts, motors, and electronic controls, retaining only simple manual operating mechanisms that have minimal wear points and can be easily replaced or maintained by the user

Inventive Principle:

Principle #2Taking out (Extraction)

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 apparatus provides a compact, portable, and efficient means to dispense expanded slit sheet paper for packaging, reducing environmental impact and eliminating the need for power sources, while ensuring even expansion and effective cushioning for articles.

Implementation Method 1

Slit sheet paper packing material increases in thickness when stretched. This stretching and increase in thickness of the slit sheet paper packing material is referred to as expansion.

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

Friction between a user's hand and the material may be sufficient to expand and dispense the material from the apparatus.

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentEP2874806B1Apparatus and method for dispensing cushioning wrap material

Publication Date: 2020.02.12 RANPAK CORP

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AI summary

An unpowered, manually operable apparatus (10) for dispensing cushioning wrap material (13) includes a frame (12), a roll (14) of interleaf material (16) rotatably secured to the frame, a roll (18) of expandable sheet material (20) in an unexpanded form rotatably secured to the frame adjacent the roll of interleaf material, and a tensioning assembly (60, 70, 80, 90) operably associated with the roll of expandable sheet material to control rotational resistance thereof. The rotational resistance causes the expandable sheet material to expand in length and thickness as it is pulled with the interleaf material by a user. Typically, the roll of interleaf material and the roll of expandable sheet material are secured to the frame such that respective longitudinal centerlines of each roll are substantially aligned. In addition, typically, the axial directions of the rolls are substantially parallel.