Absorbent Pad Edge Folding for Precise Fiber Separation

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Solution Overview

Problem

Existing methods for producing absorbent bed pads with folds at the longitudinal edges require additional containment layers, increasing production costs and interfering with air blower separation of excess absorbent fibers.

Innovation Solution

Folding the longitudinal flaps of the support layer strip over the service surface before deposition, followed by precise separation with air blowers, and subsequent folding over the deposition surface to achieve desired folds without obstructing air flow.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If a containment layer strip is added to create folds at longitudinal edges, then the desired fold structure is achieved, but production cost increases and air blower separation is interfered with

Engineering Contradiction:

Improvefold structure at longitudinal edgesVSAvoidproduction cost and process complexity

Core Design Contradiction:

ShapeVSDevice complexity

Solution Approach 1:

The invention extracts the folding function from a separate containment layer and integrates it directly into the support layer strip. By folding the longitudinal edges of the support layer itself, the patent eliminates the need for an additional containment layer while achieving the same structural effect, thereby reducing production cost and simplifying the process.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention merges the folding structure and support layer into a single integrated component. Instead of having a separate containment layer for folding, the longitudinal edges of the support layer are folded over to form the desired shape, combining multiple functions into one layer and reducing overall complexity.

Inventive Principle:

Principle #5Merging (Combining)

2Shape

If the support layer strip width is increased to enable folding, then folds can be created, but air blower separation of excess fibers is hindered

Engineering Contradiction:

Improvefold capabilityVSAvoidfiber separation precision

Core Design Contradiction:

ShapeVSManufacturing precision

Solution Approach 1:

The invention applies preliminary action by folding the longitudinal edges of the support layer over the service surface before the deposition process. This pre-folding creates the necessary shape while ensuring that the folded edges do not interfere with subsequent air blower separation of excess fibers during deposition, as the folds are already in place and positioned correctly.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention segments the support layer into a central deposition area and folded edge areas. By separating these functional zones through folding, the patent allows the central area to receive fibers while the folded edges are positioned away from the deposition zone, preventing interference with air blower separation and maintaining manufacturing precision.

Inventive Principle:

Principle #1Segmentation

3Manufacturing precision

If longitudinal flaps are folded before deposition, then air flow separation is improved, but the process complexity increases

Engineering Contradiction:

Improvefiber separation precisionVSAvoidfolding process complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The invention applies self-service by using the support layer's own longitudinal edges to create the folding structure. The support layer folds itself over the service surface without requiring external containment layers or complex additional mechanisms, thereby improving fiber separation precision while minimizing added process complexity.

Inventive Principle:

Principle #25Self-service

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

Enables precise separation of excess fibers and uniform distribution, reducing production costs and improving the quality of absorbent pads by avoiding interference with air flow.

Implementation Method 1

two air blowers, each arranged near a respective side of the conveyor belt and, therefore, at a respective longitudinal edge of the support layer strip deposited on the conveyor belt. The air blowers are configured to each generate a respective concentrated air jet that laps the respective longitudinal edge of the support layer strip, thereby forcing the separation of the absorbent fibres in excess from those deposited on the support layer strip.

Methodology Applied

Scientific EffectAir flow:

Data Source

PatentUS20260069465A1Apparatus and method for producing absorbent bed pads or absorbent pet mats

Publication Date: 2026.03.12 GDM

AI summary

An apparatus for producing absorbent bed pads, or absorbent pet mats, having an absorbent core with a support layer and absorbent fibres arranged on a first surface of the support layer. The apparatus includes, in sequence along an advancing direction of a support layer strip, a preparation station, a deposition station downstream of the preparation station and a forming station downstream of the deposition station. The preparation station includes first folding members configured to fold opposite longitudinal flaps of the support layer strip over a service surface of the support layer strip. The deposition station includes a deposition device configured to deposit the absorbent fibres on a deposition surface of the support layer strip opposite the service surface. The forming station includes second folding members configured to fold the longitudinal flaps of the support layer strip over the deposition surface. A method that can be carried out by the apparatus.