Hair Controller for Pelt Stretching Machine
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Solution Overview
Problem
Conventional pelt stretching machines cause hair loss and damage due to hair being squeezed between holders and the flange, resulting in unwanted hairless spots, which can lead to rejection or reduced value of the fur.
Innovation Solution
A stretching machine equipped with a hair controller that moves hair aside to expose the leather, using air streams, suction devices, plates, electrically charged bodies, or brushes to prevent hair from being caught during stretching, thereby allowing direct contact between the holder and the leather without causing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the holders squeeze the fur towards the flange to fix the lower part of the fur, then the fur can be stretched, but hair is squeezed and caught between the holders and the flange causing hair loss
Solution Approach 1:
The patent extracts the harmful factor (hair) from the contact zone between the holder and flange by introducing a protective element (such as a Teflon-coated flange or a protective plate) that prevents hair from being caught and pulled out during the squeezing action
Solution Approach 2:
The patent introduces an intermediary substance or layer (such as Teflon coating on the flange) between the holder and the fur/hair interface. This intermediary reduces friction and prevents direct mechanical entanglement of hair between the holder and flange, allowing the squeezing force to be applied without hair loss
2Length of moving object
If extreme stretching is applied to increase fur size value, then larger fur size is achieved, but hair follicles are damaged causing hairless spots
Solution Approach 1:
The patent applies preliminary protective measures before the stretching process begins, such as positioning protective elements on the flange and holders, or applying protective coatings in advance. This ensures that during extreme stretching, the hair follicles are protected from direct mechanical damage while still allowing the leather to be stretched to increase fur size
3Force
If holders press directly on the fur to fix it in position, then the fur is held securely, but hair gets caught and pulled off during stretching
Solution Approach 1:
The patent introduces an intermediary protective layer (such as Teflon coating or a protective plate) between the holder and the fur. This intermediary maintains the necessary holding force to secure the fur in position while preventing direct contact that would cause hair to be caught and pulled off during the stretching process
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 hair controller effectively prevents hair loss and damage, enabling longer fur stretching without hairless spots, thus maintaining high-quality fur and avoiding price reductions.
Implementation Method 1
using air streams, suction devices, plates, electrically charged bodies, or brushes to prevent hair from being caught
Implementation Method 2
using air streams, suction devices, plates, electrically charged bodies, or brushes to prevent hair from being caught
Implementation Method 3
using air streams, suction devices, plates, electrically charged bodies, or brushes to prevent hair from being caught
Data Source
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AI summary
The present invention discloses a hair controller for mounting on a stretching machine for stretching a pelt on a pelt board which machine comprises at least one holder to engage the pelt. The hair controller comprises means for moving hair aside to expose a selected area of leather on the pelt, in particular the area of leather engaging the holder. The invention also discloses a method in which the hairs of a pelt are moved aside before the pelt is fixed by a holder in a stretching machine.